JP6460956B2 - Bathroom heating dryer - Google Patents

Description

  The present invention relates to a bathroom heater / dryer that performs bathroom heating, ventilation, bathroom drying, and clothes drying.

  This type of bathroom heating / drying machine has a fan driven by a fan motor, a circulation air passage for deriving an air flow generated by taking in the air in the bathroom by the fan, and a branch from the circulation air passage. And a ventilation air passage for leading the air flow to the outside of the bathroom.

  Heating means for heating the air flow by the fan is provided in the downstream side of the circulation air passage, and the inside of the bathroom is heated by the air flow led out from the circulation air passage into the bathroom (heating operation). In addition, the bathroom is ventilated by discharging the air flow from the fan to the outside through the ventilation air passage (ventilation operation). Furthermore, by simultaneously sending an air flow by a fan to both the circulation air passage and the ventilation air passage, clothes drying for drying laundry or the like in the bathroom and drying of the bathroom are performed (drying operation).

  Switching of the air flow sending direction by the fan is performed by a damper. The damper is provided at a branch position between the circulation air passage and the ventilation air passage, and closes the ventilation air passage during the heating operation and closes the circulation air passage during the ventilation operation. Moreover, at the time of drying operation, it is hold | maintained in the position set between the circulation air path and the ventilation air path.

  By the way, since the position of the damper at the time of drying operation is between the circulation air path and the ventilation air path, the damper is deviated from the normal position due to an external factor (for example, bathroom air pressure fluctuation accompanying opening / closing of the bathroom door). There is a case. If the damper is displaced from the normal position and the air volume on the ventilation side decreases or the air flow sent into the bathroom decreases, the drying efficiency during drying operation decreases and clothes drying and bathroom drying are insufficient. There is a risk of becoming.

  Conventionally, in this type of bathroom heating dryer, in order to prevent the drying efficiency from being lowered as described above, a sensor (for example, a magnetic sensor and a magnet as a detected element) is provided to detect the position of the damper. A sensor that corrects the position of a damper by a control unit when a sensor detects a deviation from a normal position is known (see Patent Document 1 below).

Special table 2013-512371 gazette

  However, the sensor for detecting the position of the damper is not only relatively expensive, but also has the disadvantage that the manufacturing cost increases due to an increase in man-hours for mounting the sensor and the corresponding element to be detected.

  In view of the above points, an object of the present invention is to provide a bathroom heating dryer that can suppress an increase in manufacturing cost and eliminate a position shift of a damper from a drying operation position due to an external cause.

In order to achieve such an object, the present invention provides a fan that sucks air in a bathroom to forcibly generate an air flow, a fan motor that drives the fan, and a circulation that guides the air flow into the bathroom. An air passage, a heating means provided in the downstream side of the circulation air passage, for heating the air flow, and the air flow branched from the circulation air passage on the upstream side of the heating means to the outside of the bathroom A ventilation air passage to be led out, and a branching position between the circulation air passage and the ventilation air passage are rotatably provided, and the air flow is guided to the circulation air passage and the ventilation air passage according to a rotation angle. A damper, a damper drive motor that drives the rotation of the damper, and a control unit that controls the rotation of the damper via the damper drive motor. The damper is controlled by the control unit during heating operation. It is held at a position that closes the ventilation airway and In a bathroom heating dryer that is held at a position that closes the circulation air passage by the control unit, and that is held at a drying operation position set between the circulation air passage and the ventilation air passage by the control unit at the time of drying operation. The damper drive motor is a stepping motor, and the control unit stops the rotation of the fan when the current value of the fan motor fluctuates beyond a predetermined range during a drying operation , The damper is re-adjusted to the drying operation position by rotating the damper to a predetermined origin position by a damper drive motor and then rotating the damper to the drying operation position.

  The present inventor has found that the current value of the fan motor fluctuates beyond a predetermined range when the damper is located at the drying operation position and when the damper is displaced from the drying operation position. The present invention is based on this finding. That is, when it is detected that the current value of the fan motor fluctuates beyond a predetermined range during the drying operation, it can be considered that the damper has deviated from the drying operation position.

  Therefore, in the present invention, when the current value of the fan motor fluctuates beyond a predetermined range during the drying operation, the control unit readjusts the damper to the drying operation position. According to this, it is possible to determine the displacement of the damper from the drying operation position without providing a conventional sensor or the like, and it is possible to eliminate the displacement of the damper while suppressing an increase in cost.

At this time, by adopting a stepping motor as the damper drive motor, the damper can be rotated from the origin position in the direction and angle according to the electrical pulse signal sent from the control unit. Control can be performed easily and with high accuracy. That is, for example, when the position where the ventilation air passage is blocked is the origin position of the damper, the damper is rotated and held to the drying operation position only by sending a predetermined number of pulses corresponding to the drying operation position to the damper driving motor. be able to.

  When the damper whose position has shifted due to an external cause is readjusted to the drying operation position, the control unit controls to return the damper to the origin position and then send a predetermined number of pulses corresponding to the drying operation position to the damper drive motor. The damper returns to the drying operation position. This eliminates the need for a sensor for detecting that the damper is in the drying operation position, and allows readjustment to be performed reliably. Therefore, an increase in cost can be suppressed and the position deviation of the damper can be eliminated.

The figure which shows typically the principal part structure of the bathroom heating dryer of embodiment of this invention. The graph which shows the relationship between the electric current fluctuation of a fan motor, and a damper position. The flowchart which shows the action | operation of a control part.

  An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the bathroom heating / drying machine 1 of the present embodiment includes a housing 3 attached so as to be embedded in the ceiling 2 of the bathroom, and the lower surface of the housing 3 passes through an opening 4 formed in the ceiling 2. I'm in the bathroom.

  Inside the housing 3, a fan 5 that forcibly generates an air flow and a fan motor 6 that drives the fan 5 are provided. A suction port 7 and a blowout port 8 are both formed downward on the lower surface of the housing 3.

  The air outlet 8 is formed in a horizontally long rectangular shape, and the air outlet 8 is provided with a louver 9 that can change the air direction.

  In the housing 3, an original ventilation path 10 that houses the fan 5, a heating ventilation path 11 that communicates with the original ventilation path 10, and a ventilation ventilation path 12 are formed. The heating ventilation path 11 and the ventilation ventilation path 12 are bifurcated from the downstream end of the original ventilation path 10 and extend downstream in different directions.

  The upstream end of the original ventilation path 10 is a suction port 7. A downstream end of the heating air passage 11 serves as an outlet 8. The downstream end of the ventilation passage 12 is a discharge port 13. The discharge port 13 is connected to a duct (not shown) that opens outdoors. The former ventilation path 10 and the heating ventilation path 11 correspond to the circulation ventilation path of the present invention, and the former ventilation path 10 and the ventilation ventilation path 12 correspond to the ventilation ventilation path in the present invention. The fan 5 forcibly sucks the air in the bathroom from the suction port 7 into the original ventilation path 10 and generates an airflow toward the heating ventilation path 11 and the ventilation ventilation path 12.

  A heating means 14 is provided in the vicinity of the upstream side of the outlet 8. The heating means 14 is comprised with the heat radiator which flows the warm water supplied from the heat source machine outside a figure. Further, a damper 15 is provided at a branch position between the heating ventilation path 11 and the ventilation ventilation path 12. The damper 15 is supported by a rotating shaft 17 to which the rotational force of a stepping motor 16 (damper driving motor) is transmitted. The fan motor 6 and the stepping motor 16 are controlled by the control unit 18.

  The damper 15 is located in a heating position where the ventilation passage 12 is closed during the heating operation and the heating ventilation passage 11 is fully opened, and the ventilation passage 11 is closed during the ventilation operation. It is located in the ventilation position where the path 12 is fully opened, and during the drying operation, the heating ventilation path 11 and the ventilation ventilation path 12 are simultaneously half-opened between the heating ventilation path 11 and the ventilation ventilation path 12. It is controlled by the control unit 18 so as to be positioned at the position (drying operation position). The control unit 18 transmits the pulse corresponding to the drive rotation angle of the rotating shaft 17 that supports the damper 15 to the stepping motor 16, thereby rotating the damper 15 to each position easily and accurately.

  By the way, when the damper 15 is located at the heating position or the ventilation position, it can be in contact with the edge of the ventilation path and the like to maintain a stable posture. Must be maintained by 17 stops.

  For this reason, for example, if the pressure change in the bathroom accompanying the opening / closing of the bathroom door is received, the damper 15 cannot be maintained only by stopping the rotating shaft 17, and the damper 15 is moved to the heating position side or the ventilation position side. It may shift.

  On the other hand, the air flow is forcibly formed by rotating the fan 5 in any of the heating operation, the ventilation operation, and the drying operation. At this time, when the damper 15 is shifted to the heating position side or the ventilation position side, the current value of the fan motor 6 greatly fluctuates. FIG. 2 shows the results of a test conducted by the inventor. In this test, the position of the damper 15 is displaced from the dry position by opening and closing the bathroom door, and the current value of the fan motor 6 at that time is measured. As shown in FIG. 2, it is clear from the test that the current value of the fan motor 6 changes when the damper 15 is located at the dry position and when the damper 15 is displaced from the dry position. It became.

  Therefore, in the bathroom heating dryer 1 of the present embodiment, it is determined whether the damper 15 is displaced from the drying position based on the current value of the fan motor 6, and the damper 15 is displaced from the drying position. If it is considered that the control unit 18 is present, the control unit 18 readjusts the damper 15 to the dry position.

  The operation of the control unit 18 at this time will be described in detail. As shown in FIG. 3, when the drying operation is started, the control unit 18 operates the stepping motor 16 in STEP 1 to move the damper 15 to the origin position (this embodiment). In the form, the process is returned to the ventilation position. At this time, if the damper 15 is already in the ventilation position, the damper 15 maintains the stopped state. Next, in STEP 2, the control unit 18 transmits a pulse corresponding to the rotation angle until the damper 15 is positioned from the origin position to the drying position to the stepping motor 16. Thereby, the damper 15 is located in the drying position. Next, the control unit 18 proceeds to STEP 3 and drives the fan motor 6 to rotate the fan 5. Thereby, it will be in a dry driving | running state, and the air in a bathroom containing moisture etc. will be discharged | emitted simultaneously with warm air being sent to a bathroom. When the drying operation is performed, the control unit 18 proceeds to STEP 4 and determines whether or not the current value of the fan motor 6 has fluctuated beyond a predetermined range. When the current value of the fan motor 6 fluctuates beyond a predetermined range, the control unit 18 proceeds to STEP 5, stops the fan motor 6, and returns to STEP 1. The subsequent processing by the control unit 18 in STEP 1 and STEP 2 is processing for readjusting the damper in the present invention to the drying operation position.

  As described above, when the current value of the fan motor 6 fluctuates beyond a predetermined range in STEP 4, the control unit 18 performs readjustment assuming that the damper 15 is displaced from the dry position. It is possible to prevent a decrease in the amount of airflow to the side and a decrease in drying efficiency and insufficient drying of clothes and bathrooms.

  In addition, it is possible to use the stepping motor 16 which is inexpensively configured without providing a sensor for detecting the position of the damper 15 and is extremely easy to control, and the position of the damper 15 can be readjusted with high accuracy. it can.

  DESCRIPTION OF SYMBOLS 1 ... Bathroom heating dryer, 5 ... Fan, 6 ... Fan motor, 11 ... Heating ventilation path (circulation ventilation path), 12 ... Ventilation ventilation path (ventilation ventilation path), 14 ... Heating means, 15 ... Damper, 16 ... Stepping motor (damper drive motor), 18 ... control section.

Claims (1)

A fan that sucks air in the bathroom to forcibly generate an air flow, a fan motor that drives the fan, a circulation air passage that guides the air flow into the bathroom, and a downstream inside of the circulation air passage A heating means for heating the air flow, a ventilation air passage that branches from the circulation air passage upstream of the heating means and leads the air flow to the outside of the bathroom, and the circulation air passage; A damper that is rotatably provided at a branch position with the ventilation air passage, and that guides the air flow to the circulation air passage or the ventilation air passage according to a rotation angle, and a damper that drives the rotation of the damper A drive motor and a control unit that controls the rotation of the damper via the damper drive motor, and the damper is held at a position that closes the ventilation air passage by the control unit during heating operation. At this time, the control unit maintains the position where the circulating air passage is blocked. Is, in bathroom heater dryer held the set drying operation located between the time of the drying operation and the air circulation duct by said control unit and said ventilating air duct,
The damper drive motor is a stepping motor,
The control unit stops rotation of the fan when the current value of the fan motor fluctuates beyond a predetermined range during a drying operation, and the damper driving motor causes the damper to move to a predetermined origin position. The bathroom heating / drying machine is characterized in that the damper is readjusted to the drying operation position by rotating to the drying operation position after being rotated to the drying operation position.