JP2017096506A - Bathroom ventilation dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bathroom ventilation dryer capable of correcting a stop position of a damper which has been deviated due to a sudden change of pressure, when performing switching of a circulation air passage and an exhaust air passage by the angle of the damper.SOLUTION: A bathroom ventilation dryer includes: a blower for introducing air from a suction port to an inside-bathroom blowout port and/or an outside-bathroom blowout port; a damper for distributing to the circulation air passage and the exhaust air passage; and a stepping motor for changing the angle of the damper. The bathroom ventilation dryer also includes: air volume detection means for detecting air volume of the blower; air volume ratio calculation means for calculating an air volume ratio based on the air volume detected by the air volume detection means; damper stop position abnormality determination means for determining the deviation of the damper stop position from the air volume ratio; and damper reset means for returning the deviated damper to the right position.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bathroom ventilation dryer used for heating and drying a bathroom.

  As shown in FIG. 4, this type of bathroom ventilation dryer 100 conventionally includes an air passage 101 that exhausts air in the bathroom and an air passage 102 that circulates the air in the bathroom. A device that is switched by a damper 103 and a stepping motor 104 that drives the damper is known. (For example, see Patent Document 1)

JP 2003-279065 A

  In such a conventional bathroom ventilation dryer 100, when an excessive force exceeding the holding torque of the stepping motor is applied to the damper due to a sudden pressure change in the bathroom due to opening and closing of the door of the bathroom, the damper moves. As a result, the stop position may shift.

  In such a case, since the air volume ratio of the air path to exhaust and the air path to circulate differs from a design, it had the subject that the performance as an apparatus cannot be ensured.

  Then, this invention solves the said subject, and it aims at providing the bathroom ventilation dryer which corrects an air volume ratio, even when there is a sudden pressure change.

  In order to achieve this object, the bathroom ventilation dryer according to the present invention includes an air inlet for sucking in air, an air outlet in the bathroom for blowing out circulating air, an air outlet in the bathroom for blowing out exhaust air, and the air inlet. A circulation air passage that communicates with the air outlet in the bathroom, an exhaust air passage that communicates between the suction port and the air outlet outside the bathroom, and the air outlet and / or the air outlet outside the bathroom from the air inlet A blower that guides air to the air, a damper that distributes the air sucked from the suction port into the circulation air passage and the exhaust air passage, a stepping motor that changes the angle of the damper, and an air volume that detects the air volume of the blower Calculated by a detecting means, an air volume ratio calculating means for calculating a ratio of the air volume of the circulating air path and the exhaust air path based on the air volume detected by the air volume detecting means, and the air volume ratio calculating means. Based on the comparison result of the air volume ratio storage means for storing the ratio at a predetermined time interval, the air volume ratio comparison means for comparing the air volume ratio stored in the air volume ratio storage means, and the air volume ratio comparison means, the damper Damper stop position abnormality determining means for determining deviation from the stop position, and damper reset means for performing damper reset processing that is an operation of returning the damper to the correct position based on the determination result of the damper stop position abnormal means. This is to achieve the intended purpose.

  The bathroom ventilation dryer which concerns on this invention can ensure the performance as an apparatus by correcting the stop position of the damper which has shifted | deviated by the rapid pressure change.

Side sectional view which shows the structure of the bathroom ventilation dryer which concerns on Embodiment 1 of this invention. Functional block diagram of the bathroom ventilation dryer according to Embodiment 1 of the present invention. The flowchart which shows operation | movement of the bathroom ventilation dryer which concerns on Embodiment 1 of this invention. Side sectional view showing the configuration of a bathroom ventilation dryer of a conventional bathroom ventilation dryer

  The bathroom ventilation dryer according to the present invention communicates a suction port for sucking air, a bathroom outlet for blowing circulating air, a bathroom outlet for blowing exhaust air, and the suction port and the bathroom outlet. A circulation air passage, an exhaust air passage communicating the inlet and the bathroom outlet, a blower for guiding air from the inlet to the bathroom outlet and / or the bathroom outlet, and the suction A damper that distributes the air sucked from the mouth into the circulation air passage and the exhaust air passage, a stepping motor that changes the angle of the damper, an air volume detecting means that detects the air volume of the blower, and an air volume detecting means An air volume ratio calculating means for calculating a ratio of the air volume of the circulating air path and the exhaust air path based on the calculated air volume, and a wind for storing the ratio calculated by the air volume ratio calculating means at a predetermined time interval. Damper stop for determining deviation from the stop position of the damper based on the result of comparison by the ratio storage means, the air volume ratio comparison means for comparing the air volume ratio stored in the air volume ratio storage means, and the air volume ratio comparison means The apparatus includes a position abnormality determination unit and a damper reset unit that performs a damper reset process that returns the damper to a correct position based on the determination result of the damper stop position abnormality unit.

  Thereby, the air volume ratio is calculated by the air volume ratio calculating means from the air volume detected by the air volume detecting means, and the damper stop position abnormality determining means determines the damper according to the result of comparison by the air volume ratio comparing means. It is determined whether or not the stop position is deviated, and when the damper stop position abnormality determining unit determines that the damper stop position is deviated, the damper reset unit performs an operation of returning the damper to the correct position. That is, even when an excessive external force is applied to the damper and the stop position is shifted, the damper stop position can be returned to the original correct position.

Further, the air volume ratio comparing means compares the stored air volume ratio with the air volume ratio stored in the past shorter than a predetermined time from the stored air volume ratio, and the damper stop position abnormality determining means is configured to compare the air volume ratio. When the value compared by the means has a difference greater than or equal to a predetermined value, it is determined that the damper stop position is deviated from the predetermined stop position. The air volume ratio is compared with the air volume ratio just before the deviation when the damper is displaced. If the difference is not less than a predetermined value, the damper stop position abnormality determining means determines that the damper stop position is displaced. That is, the deviation of the damper stop position can be reliably determined from the difference in the compared air volume ratios.

  Further, the damper position abnormality determining means has a configuration in which a deviation from the stop position of the damper is determined when there is no movement process of the damper.

  Thereby, the damper abnormality determining means determines whether or not the damper stop position moves to a predetermined position and is deviated from the stop position after stopping. That is, the damper position abnormality determining means can determine the deviation from the stop position after the damper movement.

  Further, the damper reset process has a configuration in which the damper is returned to an initial position via the stepping motor, and the damper is moved to the predetermined stop position via the stepping motor.

  As a result, the damper is moved to a predetermined stop position before being displaced after being returned to the initial position. In other words, once the position is returned to the initial position, the damper displacement is reset, and then moved to a predetermined stop position, so that it can be reliably returned to the stop position before the shift.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments are examples embodying the present invention, and do not limit the technical scope of the present invention. In addition, throughout the drawings, the same portions are denoted by the same reference numerals, and the second and subsequent descriptions are omitted. Furthermore, in each drawing, the description of the details of each part not directly related to the present invention is omitted.

(Embodiment 1)
The bathroom ventilation dryer main body 1 according to the present embodiment controls the flow of air between inside and outside the bathroom by being embedded in the ceiling of the bathroom, for example. The inside and outside of the bathroom are usually separated by a wall and exist as different spaces.

  Hereinafter, the configuration of the bathroom ventilation dryer body 1 will be described with reference to FIGS. 1 and 2. FIG. 1 is a side sectional view showing a configuration of a bathroom ventilation dryer and a functional block diagram of the bathroom ventilation dryer.

  The bathroom ventilation dryer main body 1 includes a suction port 2, a bathroom outlet 3, a bathroom outlet 4, a circulation air passage 5, an exhaust air passage 6, and a control means 16.

  The suction port 2 is a downward opening for sucking air from the inside of the bathroom, that is, the lower space of the bathroom ventilation dryer main body 1 (downward direction in FIG. 1).

  The bathroom outlet 3 is a downward opening for blowing the air sucked from the inlet 2 into the lower space of the bathroom ventilation dryer main body 1.

  The bathroom outside outlet 4 is an opening directed to the side for blowing the air sucked from the inlet 2 outside the bathroom, that is, to the side space (right direction in FIG. 1) of the bathroom ventilation dryer body 1.

  The circulation air passage 5 communicates the suction port 2 and the bathroom outlet 3. That is, it is an air passage that guides air from the inlet 2 to the bathroom outlet 3 through the internal space of the bathroom ventilation dryer body 1.

  The exhaust air passage 6 communicates the suction port 2 and the outside bathroom outlet 4. That is, it is an air path that guides air from the inlet 2 to the bathroom outlet 4 through the interior space of the bathroom ventilation dryer body 1.

  Moreover, the bathroom ventilation dryer main body 1 is provided with the air blower 7, the damper 8, the stepping motor 9, and the air volume detection means 10 as a means to make the flow of air.

  The blower 7 includes a motor 20 and a fan 21 that generates a flow of air by being rotationally driven by the motor 20. The blower 7 guides air from the inlet 2 to the bathroom outlet 3 and / or the bathroom outlet 4. That is, depending on the position of the damper 8 to be described later, when air is guided from the suction port 2 to both the bathroom outlet 3 and the bathroom outlet 4, and when air is guided only from the suction port 2 to the bathroom outlet 3. In some cases, air is led from the suction port 2 only to the bathroom outlet 4.

  The damper 8 is a flat plate that is larger than the openings of the bathroom outlet 3 and the bathroom outlet 4, that is, has an area capable of closing these two openings. The damper 8 changes the angle with respect to the air blown from the blower 7, and distributes the air sucked from the suction port 2 to the circulation air passage 5 and the exhaust air passage 6 at a predetermined ratio. In the present embodiment, the air blowing from the blower 7 is the horizontal direction of the damper 8 in FIG.

  The stepping motor 9 changes the angle of the damper 8 with respect to the blowing of air from the blower 7. Specifically, the stepping motor 9 rotates by a predetermined angle in accordance with the number of applied pulse signals, and changes the angle of the damper 8 with respect to the air blowing.

  The air volume detection means 10 corresponds to, for example, a fine differential pressure sensor, and is provided in the circulation air path 5 and the exhaust air path 6 to detect the air volume in each air path from the blower 7.

  The blower 7, the stepping motor 9, and the air volume detection means 10 are connected to the control means 16 and function as described above according to the control signal from the control unit 16.

  The control unit 16 is, for example, a microcomputer, and includes a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and a fan 7, a stepping motor 9, and an air volume in the bathroom ventilation dryer main body 1. A driver corresponding to each drive unit such as the detection means 10 is connected via an internal bus. For example, the CPU uses a RAM as a work area, executes a program stored in the ROM, and controls the operation of each drive unit by exchanging data and commands with the driver based on the execution result.

  By the way, the bathroom ventilation dryer main body 1 determines the ratio of the air volume of the circulation air passage 5 and the exhaust air passage 6 according to the angle of the damper 8, and at that time, the wind pressure from the blower 7 is applied to the damper 8. . That is, the stepping motor 9 that changes the angle of the damper 8 has a holding force higher than the wind pressure from the blower 7 when stopped, and maintains a predetermined stop position. Here, for example, when the bathroom door is suddenly opened or closed, the pressure in the bathroom changes rapidly. In particular, the bathroom has a high degree of sealing and is a narrow space. For example, the pressure change during opening and closing operations of doors and windows is larger than that of a normal room. If an excessive force exceeding the holding force of the stepping motor 9 is applied to the damper 8 in addition to the wind pressure from the blower 7, the stepping motor 9 moves unintentionally under the pressure. That is, there is a possibility that the stop position of the damper 8 cannot be maintained. As a result, the balance of the air volume ratios of the circulation air passage 5 and the exhaust air passage 6 is lost, and the original performance of the bathroom ventilation dryer main body 1 cannot be exhibited or does not function.

  Therefore, the bathroom ventilation dryer main body 1 includes the following means for returning the damper 8 to the original predetermined stop position when the stop position of the damper 8 is shifted. The following means are provided as a program or memory executed in the control means 16.

  As means for maintaining the stop position of the damper 8 at a predetermined stop position, air volume ratio calculation means 11, air volume ratio storage means 12, air volume ratio comparison means 13, damper stop position abnormality determination means 14, and damper reset processing are performed. The damper reset means 15 to perform is provided.

  The air volume ratio calculating means 11 calculates the ratio of the air volume of the circulating air path 5 and the exhaust air path 6 based on the air volume detected by the air volume detecting means 10 provided in the circulating air path 5 and the exhaust air path 6.

  The air volume ratio storage unit 12 stores the air volume ratio calculated by the air volume ratio calculation unit 11 at a predetermined time interval, for example, an interval of 10 seconds. That is, the air volume ratio storage means 12 is provided in a predetermined storage area in the above-described RAM.

  The air volume ratio comparison means 13 compares the air volume ratio stored in the air volume ratio storage means 12 with the air volume ratio stored in the past, for example, 1 minute, shorter than a predetermined time from the stored air volume ratio.

  The damper stop position abnormality determining means 14 is based on the result of comparison by the air volume ratio comparing means 13 in a state where the damper 8 is not moved, and when the compared value has a difference of a predetermined value or more, It is determined that the stop position has a deviation from a predetermined stop position.

  The damper reset means 15 returns the damper 8 to the initial position once when the judgment result of the damper stop position abnormality judgment means 14 determines that the stop position of the damper 8 is deviated, and then moves to a predetermined stop position, that is, Perform the operation to return to the original position.

  The operation of returning the stop position of the damper 8 shifted by the damper reset means 15 to the predetermined stop position based on the air volume detected by the air volume detection means 10 in the above configuration will be described with reference to FIG. In the figure, “S” means a step.

  First, the case where the bathroom ventilation dryer main body 1 is dried and operated will be described as an example. The “drying operation” here is an operation of drying the inside of the bathroom, and in this case, for example, the air volume ratio between the exhaust air passage and the circulation air passage is, for example, 50:50. The angle of the damper 8 that realizes this ratio is 15 degrees upward when the leftward horizontal direction in FIG. 1 is 0 degree. However, this angle varies depending on the type and configuration of the bathroom ventilation dryer body 1.

  When the operation is started, the bathroom ventilation dryer body 1 determines the operation type (FIG. 3: S01).

  Here, when the operation type is “dry operation”, the bathroom ventilation dryer body 1 sets the angle of the damper 8 to 15 degrees in order to secure the circulation air passage 5 and the exhaust air passage 6 at a ratio of 50:50. Perform the action to change. In this case, the stepping motor 9 operates based on the signal from the control means 16 to move (turn) the damper 8, and the damper 8 stops at 15 degrees (FIG. 3: S01 Yes → S02).

  If it is not “drying operation”, the check in the drying operation is repeated or another process is performed. However, the subsequent processing is not limited to the “drying operation”, and may be executed in another operation (FIG. 3: S01 No).

  Thereafter, the control means 16 operates the blower 7 and sucks air from the suction port 2. The sucked air is sent out from the bathroom outlet 3 and the bathroom outlet 4 through the circulation air passage 5 and the exhaust air passage 6 (FIG. 3: S03).

  When the air is blown from the blower 7, the air volume detecting means 10 detects the air volume of the circulation air path 5 and the exhaust air path 6, and transmits the detected air volume information to the air volume ratio calculating means 11 (FIG. 3: S04).

  When the air volume ratio calculation means 11 receives the air volume information from the air volume detection means 10, the air volume ratio calculation means 11 calculates the ratio of the air volume of the circulation air path 5 and the air volume of the exhaust air path 6 from the received air volume information, and calculates it in the air volume ratio storage means 12. The air volume ratio is transmitted (FIG. 3: S05).

  The air volume ratio storage means 12 stores the air volume ratios of the circulation air path 5 and the exhaust air path 6 received from the air volume ratio calculation means 11 at a predetermined time interval, for example, an interval of 10 seconds, and transmits it to the air volume ratio comparison means 13 ( Figure 3: S06).

  The air volume ratio comparison means 13 compares the stored air volume ratio received from the air volume ratio storage means 12 with, for example, the air volume ratio stored in the past, eg, 1 minute, shorter than a predetermined time from the stored air volume ratio. (FIG. 3: S07).

  The comparison result is transmitted to the damper stop position abnormality determination means 14.

  The damper stop position abnormality determination means 14 determines whether or not the comparison result in the air volume ratio comparison means 13 has a difference equal to or greater than a predetermined value (FIG. 3: S08).

If there is a difference, an excessive force exceeding the holding force of the stepping motor 9 is applied to the damper 8, and the damper 8 moves unintentionally from a position of 15 degrees and the air volume ratio of the circulation air path 5 and the exhaust air path 6. Means changing. In this case, the damper stop position abnormality determination means 14 determines that the stop position of the damper 8 is deviated from the predetermined stop position (FIG. 3: S08 Yes → S09). If it is determined that there is a shift, the damper reset means 15 once returns the damper 8 to the initial position (in order to return the shift of the stop position of the damper 8 to the original predetermined stop position (in this case, a 15 degree position)). (0 degree position) and then moved to a predetermined stop position (15 degree position). (Figure 3: S10)
In other words, the damper stop position abnormality determining means 14 determines the deviation of the stop position of the damper 8 from the change in the air flow ratio in this way, and the damper reset means 15 returns the original position to the original position. Even in the case of a failure, it can be maintained at a predetermined stop position.

  On the other hand, if the result of comparing the stored air volume ratio with the past air volume ratio in the air volume ratio comparing means 13 is not different from a predetermined value, the damper stop position abnormality determining means 14 determines that the stop position of the damper 8 is It determines with having not changed (FIG. 3: S08No-> S04). In such a case, it is not necessary to perform the operation of returning the damper 8 to the original stop position in the damper reset means 15.

As described above, even when the stop position of the damper 8 is shifted by determining the shift of the stop position of the damper 8 from the air volume ratio of the circulation air path 5 and the exhaust air path 6, the predetermined stop position can be maintained. it can.
(Modification)
In the above embodiment, the air volume detection means 10 is provided downstream of the blower 7 and detects the air volume from the blower 7 in the circulation air passage 5 and the exhaust air passage 6. However, it is not always necessary to detect the air volume of each of the circulation air path 5 and the exhaust air path 6. For example, the air volume of either the circulation air path 5 or the exhaust air path 6 is sucked into the blower 7 upstream or downstream of the blower 7. It is also possible to detect the air volume to be detected and calculate the air volume ratio therefrom.

  Further, the determination of the deviation of the damper from the stop position may be limited to the case where there is no damper movement process. The case where there is no movement processing here means that such a reset operation is not performed during the movement of the damper, that is, it is canceled.

  Moreover, you may delete the past record memorize | stored in the air volume ratio memory | storage means 12 after the movement process. As a result, the air volume ratio changes after the damper is moved, but the comparison with the past record is forcibly disabled by resetting, and unnecessary damper reset processing can be easily prevented.

  INDUSTRIAL APPLICABILITY The present invention is useful as a bathroom heating device that can be restored when the damper stop position is shifted.

DESCRIPTION OF SYMBOLS 1 Bathroom ventilation dryer main body 2 Air inlet 3 Bathroom outlet 4 Bathroom outside outlet 5 Circulation air path 6 Exhaust air path 7 Blower 8 Damper 9 Stepping motor 10 Air volume detection means 11 Air volume ratio calculation means 12 Air volume ratio storage means 13 Air volume Ratio comparison means 14 Damper stop position abnormality determination means 15 Damper reset means

Claims (5)

A suction port for inhaling air;
A bathroom outlet that blows out the circulating air;
An outdoor air outlet for blowing exhaust air;
A circulation air passage communicating the suction port and the bathroom outlet;
An exhaust air passage communicating the suction port and the bathroom outlet;
A blower that guides air from the inlet to the bathroom outlet and / or the bathroom outlet;
A damper that distributes the air sucked from the suction port into the circulation air passage and the exhaust air passage;
A stepping motor that changes the angle of the damper;
An air volume detecting means for detecting an air volume of the blower;
An air volume ratio calculating means for calculating a ratio of the air volume of the circulating air path and the exhaust air path based on the air volume detected by the air volume detecting means;
An air volume ratio storing means for storing the ratio calculated by the air volume ratio calculating means at a predetermined time interval;
An air volume ratio comparing means for comparing the air volume ratio stored in the air volume ratio storage means;
Damper stop position abnormality determining means for determining a deviation from the stop position of the damper based on the result of comparison by the air volume ratio comparing means;
Damper reset means for performing damper reset processing, which is an operation for returning the damper to the correct position based on the determination result of the damper stop position abnormality means;
With bathroom ventilation dryer. The air volume ratio comparing means is:
Compare the memorized air volume ratio with the memorized air volume ratio stored in the past shorter than a predetermined time,
The damper stop position abnormality determining means is
The bathroom ventilation dryer according to claim 1, wherein when the value compared by the air volume ratio comparison means has a difference of a predetermined value or more, the stop position of the damper is determined to have a deviation from the predetermined stop position. The damper position abnormality determining means is
The bathroom ventilation dryer according to claim 1 or 2, wherein a deviation from a stop position of the damper is determined when there is no movement process of the damper. The damper reset process
Return the damper to the initial position via the stepping motor,
The bathroom ventilation dryer according to any one of claims 1 to 3, wherein the damper is moved to the predetermined stop position via the stepping motor. The air volume detecting means is
The bathroom ventilation dryer in any one of Claim 1 to 4 which detects the air volume from the said air blower in each air path of the said circulation air path and the said exhaust air path.

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