JP4671138B2 - Bathroom Dryer - Google Patents

Description

  The present invention relates to a bathroom dryer.

  Since such a bathroom dryer ejects air passing through the heater into the bathroom in the circulation mode, it is particularly required to ensure safety around the heater as a heat source. One event that hinders safety around the heater is a high temperature around the heater. The reason for the high temperature around the heater is that the amount of heat exchange in the heater decreases, such as the flow of air around the heater is completely lost, or the flow of air is extremely low even if it is not lost at all. Can be mentioned. If the temperature around the heater becomes high due to such a cause, there is a risk of causing an abnormality in the system constituting the bathroom dryer.

  Therefore, if the cause of the high temperature around the heater is examined in more detail, two major causes can be considered. The first cause is a state in which the motor system of the blower for sending out the wind breaks down and stops and no wind is sent around the heater. In this case, since the system abnormality that the motor stops is the cause, it is necessary to stop the system and have the user make a repair request to the user. The second cause is that the clogging of the filter proceeds excessively, and the wind sent around the heater is extremely reduced. In this case, the system is not caused by a system failure such as a motor failure, but the filter is excessively clogged due to insufficient care of the user or the like, and the amount of air flowing to the heater is extremely reduced. In this case, the temperature around the heater rises similarly, although not as much as when the air flow is completely stopped by the motor stop. However, this state is different from the previous system abnormality state and can be easily solved by having the filter cleaned.

  Early detection of the temperature rise around the heater due to the second cause described above is important for ensuring safety around the heater. This is because if this condition is left undetected and the filter is left unattended, clogging of the filter will progress further, leading to a more serious system abnormality such as a motor system. For this reason, it is very important to accurately detect a state of excessive clogging of a filter that is not a system abnormality even in a high temperature abnormality so as not to proceed to a system abnormality.

Under such a background, a technique has been disclosed in which clogging of a filter is detected by detecting a temperature rise around a heater with a temperature sensor (see, for example, Patent Document 1 below).
JP 2007-183038 A

  In the above conventional technique, a temperature sensor is arranged in a flow path downstream of the heater and through which air flows in a normal state. However, in this position, the temperature sensor can detect the temperature when the filter is not clogged and the air is flowing normally, but the filter is clogged excessively and the air flow rate is reduced. In a state where the temperature has dropped significantly, the temperature sensor is not always located in the reduced air flow, and it was very difficult to accurately detect the high temperature. is there. More specifically, when the filter is clogged excessively, the air flow rate is greatly reduced, and at the same time, the air velocity vector is also greatly reduced, such as the air flow in the bathroom and various damper positions such as the damper position for switching the flow path. The airflow becomes unstable due to factors. Therefore, the place where the high-temperature air that has passed through the heater flows is not always the same place, and the situation where the reduced high-temperature air always passes over the temperature sensor does not occur. Therefore, in the above conventional technology, it is not possible to accurately detect a high temperature state in which a non-abnormal filter is excessively clogged in the temperature rise around the heater, and as a result, the motor system fails due to the high temperature. There was a fear that it would be advanced to such a state.

  Therefore, an object of the present invention is to provide a bathroom dryer that can accurately and reliably detect a state of high temperature abnormality around a heater from a state of excessive clogging of a filter that is not a system abnormality.

  In order to solve the above problems, the bathroom dryer according to the first aspect of the present invention includes a circulation mode in which the air in the bathroom is sucked and the air is blown out through the heater, and the bathroom is sucked in the bathroom. A bathroom dryer having a ventilation mode for discharging outside, a main body fixed to the ceiling of the bathroom, a blower stored in the main body, and provided in the main body and blown out from the blower A ventilation port for discharging air to the outside of the bathroom, a circulation outlet provided in the lower part on the bathroom side in the main body, and for blowing out the air blown from the transmitter into the bathroom; and in the circulation outlet A heater disposed in the main body, a lower side which is upstream of the blower in the main body and which is the bathroom side, a suction port which is open to the bathroom side, a filter which is provided in the suction port, Blower and filter A negative pressure generator provided between the heater and the filter, the negative pressure in the negative pressure generator is increased when the filter is clogged, and the heater increases with the negative pressure. The return flow path is formed so that the downstream air that has passed through the filter is returned to the blower as a return air flow without passing through the filter, and a return flow path is formed so that the return air flow passes through the position of the temperature sensor that detects the temperature. Means are provided.

  According to the present invention, the negative pressure generating portion formed between the blower and the filter is configured so that a large negative pressure is generated when the filter is clogged excessively, and at the same time, the heater is generated by the generated large negative pressure. A return flow path forming means for forming the return flow path so that the high-temperature air that has passed through the filter is reliably sucked and can be reliably returned to the blower through the return flow path configured not to pass through the filter. It is supposed to be prepared. Further, the return flow path is configured such that the return airflow passes through the position where the temperature sensor is disposed. Therefore, even if the filter is clogged and the air volume and velocity vector are greatly reduced, the hot air will surely pass over the temperature sensor located on the return flow path. It is possible to reliably detect an abnormal condition at a high temperature. Moreover, since the sucked hot air is returned to the blower as a shortcut that does not pass through the filter, the hot air touches the outside air upstream of the filter or passes through the filter, resulting in a temperature drop. It is possible to detect early and reliably that there is a high temperature abnormal state. Therefore, it is a practically excellent effect that it can be surely avoided that the system malfunctions because the high temperature state due to clogging of the filter cannot be accurately determined, and as a result, the system abnormalities in which the air blowing stops completely Can be played.

  Moreover, the bathroom dryer which concerns on this-application Claim 2 WHEREIN: The said return flow path formation means arrange | positions the said air blower and the said circulation blower outlet in the diagonal direction of the said main body, and arrange | positions the said temperature sensor of the said main body. It arrange | positions on a diagonal line, It is characterized by the above-mentioned.

  According to this aspect, since the circulation blower outlet and the blower are spaced apart from each other in the diagonal direction of the main body, the return airflow flowing into the return flow path from the periphery of the circulation blower outlet is along the diagonal line of the main body. Flowing into. Therefore, by arranging the temperature sensor on the diagonal line of the main body, the temperature can be accurately measured even when the return airflow flows into the return flow path from any part of the circulation outlet.

  Further, the bathroom dryer according to claim 3 of the present application is characterized in that the temperature sensor is arranged so as to be biased toward the blower side with respect to the circulation outlet.

  The return airflow that has flowed into the return flow path from the periphery of the circulation outlet flows toward the blower serving as the negative pressure generation source. Therefore, by arranging the temperature sensor so as to be biased toward the blower, it is possible to configure the return airflow to flow reliably on the temperature sensor.

  Further, in the bathroom dryer according to claim 4 of the present invention, the downstream air that has passed through the heater is sucked into the return flow path and passes as a return air flow, while other outside air is sucked and does not pass. It is comprised by these.

  According to this aspect, since the downstream air that has passed through the heater is sucked into the return airflow without sucking other outside air, the temperature of the return airflow can be accurately measured without causing a temperature drop of the air passing through the temperature sensor. Can be measured.

  The bathroom dryer according to claim 5 includes a heater case that houses the heater and is fixed to the main body, and a louver at the circulation outlet, and the heater case or the heater case and the louver. The intake portion for the return airflow is formed between the two.

  According to this aspect, the air downstream of the heater can be surely sucked and the suction of outside air after passing through the louver can be suppressed, so that the feedback accurately occurs without causing a temperature drop of the air passing through the temperature sensor. The temperature of the airflow can be measured.

  In the bathroom dryer according to claim 6, the return flow path has one end connected to the intake portion and the other end connected to the negative pressure generating portion, the upper surface is the main body, and the lower surface is the main body. It is characterized by being comprised as an airtight flow path from which external air does not flow in from the middle by being covered with the cover which covers the lower part which becomes the bathroom side of each.

  According to this aspect, the closeness of each member can be ensured with a simple configuration, and it can be configured as a highly airtight flow path in which outside air does not flow into the period flow path from the middle, and more reliably high-temperature air directly under the heater. Therefore, the temperature of the return airflow can be accurately measured without causing a temperature drop of the air passing through the temperature sensor.

  The bathroom dryer according to claim 7 includes a concentrated negative pressure generating chamber separated from the main body by an annular standing wall extending from the main body to the vicinity of the filter, and the concentrated negative pressure. A suction part connected to the other end of the return flow path is provided on the circulation outlet side of the generation chamber.

  According to this aspect, since the concentrated negative pressure generating chambers separated by the annular standing wall are provided, a large negative pressure can be generated, and the return airflow can be surely flowed in through the return flow path. A return airflow can be flowed over the temperature sensor.

  Further, the bathroom dryer according to claim 8 of the present application is characterized in that the length of the standing wall extending from the main body is shortened, and the tip of the standing wall is kept at a predetermined distance from the filter. .

  According to this aspect, the length of the standing wall of the concentrated negative pressure generating chamber is shortened, and the tip of the standing wall is kept at a predetermined distance from the filter, so the air on the circulation outlet side is sucked from that portion. It has become easier. Accordingly, the return airflow can be reliably introduced through the return flow path with a simple configuration.

  According to the present invention, it is possible to accurately and quickly detect a situation where the heater is in a high temperature state, and it is particularly high temperature based on the reason that the filter is not excessively clogged. It is possible to provide a bathroom dryer capable of reliably detecting an abnormal state.

  Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  The bathroom dryer according to the embodiment of the present invention has a circulation mode for sucking air in the bathroom and ejecting the air in the direction of the bathroom via a heater, and a ventilation mode for sucking the air in the bathroom and discharging it outside the bathroom. In addition to providing it, it is possible to ventilate the bathroom, which is the second room other than the bathroom. The arrangement of the bathroom dryer will be described with reference to FIG. As shown in FIG. 1, bathroom dryer DM is attached to the ceiling of bathroom BR. The bathroom dryer DM can suck air in the bathroom BR and eject the air in the direction of the bathroom BR via a heater (not shown in FIG. 1). The bathroom dryer DM can also suck the air in the bathroom BR and discharge it outside the bathroom through the duct D1. The bathroom dryer DM can also suck air in the bathroom SR through the duct SR2 connected to the suction port SR1 provided on the ceiling of the bathroom SR, and discharge the air outside the bathroom through the duct D1.

  Then, the external appearance of bathroom dryer DM is demonstrated, referring FIG. FIG. 2A is a rear perspective view of the bathroom dryer DM, and FIG. 2B is a front perspective view of the bathroom dryer DM. The bathroom dryer DM includes a front-side cover 30 and a main body case 10 that covers the back and side surfaces.

  As shown in FIG. 2 (a), the side surface of the main body case 10 is provided with a ventilation port 12 for discharging air during ventilation, and air is supplied from a washroom as a second chamber to the opposite side. A suction port 11 outside the bathroom is provided. Further, a blower motor FM for rotating a blower housed in the main body case 10 is exposed at the opening on the back surface of the main body case 10. Furthermore, as shown in FIG.2 (b), the cover 30 is provided with the bathroom suction port 13 which sucks in the air in a bathroom, and the circulation blower outlet 14 which blows off the heated air.

  Here, in order to explain the inside of the bathroom dryer DM, a cross-sectional view in the direction along the ventilation port 12 from the suction port 11 outside the bathroom is shown in FIG. As shown in FIG. 3, a partition wall member 20, a blower 15, and a damper 16 (first damper) are arranged in the main body case 10 in order from the bathroom suction port 13. The configuration of the partition member 20 will be described in detail later. The blower 15 is configured to rotate according to the rotation of the blower motor FM, suck air from the suction port 151, and eject air from the blower port 152. The blower 15 constitutes a blower together with the blower motor FM.

  A damper 16 is disposed at the tip of the blower outlet of the blower 15. The damper 16 is a rotary rotary damper, and plays a role of directing the air blown from the blower outlet 152 of the blower 15 to one or both of the ventilation air passage 101 and the circulation air passage 102.

  As shown in FIG. 3, the ventilation air passage 101 communicates the air outlet 152 and the ventilation port 12 of the blower 15, and the circulation air passage 102 communicates the air outlet 152 and the circulation air outlet 14 of the blower 15. Yes. Therefore, the ventilation passage composed of the ventilation air passage 101 and the circulation air passage 102 forms a bifurcated branch portion that divides the air into each, and the damper 16 is disposed at a position corresponding to the bifurcated branch portion.

  A heater 18 accommodated in a heater case 17 is disposed at the circulation outlet 14 connected to the end of the circulation air passage 102. A louver 19 is disposed downstream of the heater 18.

  As described above, the air ejected from the blower outlet 152 of the blower 15 is distributed to the respective air paths by the damper 16. FIG. 4 shows the position of the damper 16 in the ventilation mode, and FIG. 5 shows the position of the damper 16 in the circulation mode.

  As shown in FIG. 4, when the ventilation mode is executed, the damper 16 is controlled to be positioned at the first position so as to close the circulation air passage 102 and the circulation outlet 14. Further, as shown in FIG. 5, when the circulation mode is executed, the damper 16 is controlled so as to be positioned at the second position so as to block the ventilation air passage 101 and the ventilation port 12. Thereby, at the time of execution of ventilation mode, all the air spouted from the blower outlet 152 goes from the ventilation air path 101 to the ventilation opening 12. Further, at the time of execution of the circulation mode, all the air ejected from the air outlet 152 is directed from the circulation air passage 102 to the circulation air outlet 14.

  Thus, when selectively closing each air passage, it is preferable to form a labyrinth structure so that air does not leak from the gap between the damper 16, the main body case 10, and the heater case 17. An example of this preferred embodiment is shown in FIG. FIG. 6 shows an example in which the main body case 10 is provided with a facing wall portion 101a. As shown in FIG. 6, when the facing wall portion 101 a is provided at a position facing the end portion of the outer peripheral surface 161 of the damper 16, the outer peripheral surface 161 of the damper 16 is arranged at a position facing the facing wall portion 101 a. In that portion, a labyrinth structure is formed in that portion, and air does not leak. A facing wall portion similar to the facing wall portion 101 a is also formed in the heater case 17.

  Here, returning to FIG. 3, the description of the arrangement position of the damper 16 will be continued. The arrangement position of the damper 16 shown in FIG. 3 is when the clothing drying mode is executed. In the clothes drying mode, a part of the air ejected from the blower outlet 152 of the blower 15 is distributed to the ventilation air passage 101 and the remaining part is distributed to the circulation air passage 102. FIG. 7 shows a schematic diagram around the damper 16.

  As shown in FIG. 7, the damper 16 is configured to be rotatable around the rotation shaft 164, and a fan-shaped support portion 162 is attached to the rotation shaft 164. An outer peripheral surface 161 having an arc shape is provided at the tip of the support portion 162, and an inner peripheral surface 163 is provided closer to the rotating shaft 164 than the outer peripheral surface 161. The outer peripheral surface 161 has an arc shape around the rotation shaft 164 so as to cover the ventilation air passage 101 connected to the ventilation port 12 and the circulation air passage 102 connected to the circulation outlet 14 in an openable and closable manner. The inner peripheral surface 163 is positioned closer to the rotating shaft 164 than the outer peripheral surface 161, and the curvature of the inner peripheral surface 163 is formed to be gentler than that of the outer peripheral surface 161. In the example shown in FIG. 7, the inner peripheral surface 163 is formed as a flat surface.

  The clothes drying mode is a mode in which air in the bathroom is sucked, a part of the air is jetted in the direction of the bathroom via the heater 18, and the remaining air is discharged outside the bathroom. When the ventilation mode is executed, the damper 16 rotates so as to be positioned at a first position that closes the circulation outlet 14 (circulation air passage 102) (see FIG. 4, a position indicated by a two-dot chain line in FIG. 7). At the time of execution of the circulation mode, the damper 16 rotates so as to be positioned at a second position that blocks the ventilation port 12 (ventilation air passage 101) (see FIG. 5). On the other hand, as shown in FIG. 7, when the clothes drying mode is executed, the damper 16 opens so that the lower part on the bathroom side of the ventilation air passage 101 connected to the ventilation opening 12 communicates with the ventilation opening. So that the end located on the ventilation port 12 side of the inner peripheral surface 163 is located on the lower side on the bathroom side than the end located on the blower 15 side, and stops in an inclined state. Rotating from the first position to the third position past the second position. The damper 16 is fixed at this third position when the clothes drying mode is executed.

  By arranging the damper 16 as shown in FIG. 7 in the clothes drying mode, the moisture contained in the air ejected from the blower 15 is cooled in the process to become water droplets, and heavy water droplets are caused by the action of centrifugal force. Since it is blown to the outside, it is actively discharged to the vent 12 side. Therefore, high-temperature and high-humidity air is efficiently discharged to the outside, so that the clothes are not dampened again. When the clothes are dried and the moisture in the air is reduced to dry air, the moisture is low, so that the centrifugal force is not so much affected, and the water droplets are not blown far away and are discharged from the vent 12. This is suppressed, and much of the air is returned to the bathroom as circulating air. Therefore, since it is possible to suppress discarding of high-temperature air without performing special control or the like, waste of energy can be eliminated. In addition, since the inner peripheral surface 163 of the damper 16 is configured as a flat surface, air does not stagnate in the inner peripheral surface 163, and the air can be efficiently directed to the ventilation port 12 or the circulation outlet 14. it can.

  The form of the damper 16 is not limited to that shown in FIG. Modified examples of the damper 16 are shown in FIGS. The damper 16a shown in FIG. 8 has a flat inner peripheral surface 163b on the side of the air outlet 152 when it is located at the third position (position indicated by the solid line in the figure) when the clothes drying mode is executed, The remaining half inner peripheral surface 163a on the 12 side forms a curved surface with a high degree of curvature. In this case, the air blown out from the air outlet 152 is positively directed toward the circulation air outlet 14 by the inner peripheral surface 163a, so that dry hot air is wasted from the ventilation port 12 unnecessarily. Energy waste can be further suppressed. On the other hand, in the ventilation mode in which the damper 16a is located at the first position (the position indicated by the two-dot chain line in the figure), the curved surface is formed at the first position because the relationship is reversed from the third position. The inner peripheral surface 163a is located on the air outlet 152 side. Therefore, the inner peripheral surface 163a becomes a position where the contribution is low with respect to the orientation of the air, and no stagnation occurs. In the first position, since the flat inner peripheral surface 163b is located on the side of the ventilation port 12 where the contribution is high, the performance in the clothes drying mode could be further improved without impairing the ventilation performance at all. is there.

  Subsequently, the damper 16b shown in FIG. 9 forms an air directing portion 163c at the end on the side of the ventilation opening 12 when the damper 16b is located at the third position (the position indicated by the solid line in the figure) during execution of the clothes drying mode. is doing. In this case, the air blown out from the air outlet 152 is positively directed toward the circulation air outlet 14 by the air directing portion 163c, so that dry hot air is wasted from the ventilation port 12 unnecessarily. Energy waste can be further suppressed. On the other hand, in the ventilation mode in which the damper 16a is at the first position (the position indicated by the two-dot chain line in the figure), the air directing portion 163c It is located on the side of the air outlet 152, and at that position, the air is blown out from the air outlet 152 so that it does not affect the air. Therefore, the air directing part 163c becomes a position where the contribution degree is low with respect to the orientation of the air, and no stagnation occurs.

  Subsequently, in the damper 16 c shown in FIG. 10, the inner peripheral surface 163 d is not a flat surface but has an arc shape with a very large curvature, and naturally the curvature radius is larger than the curvature radius of the outer peripheral surface 161. Is formed. In this case, the air ejected from the air outlet 152 is directed by the inner peripheral surface 163d that forms a gentler degree of curvature, so that it is possible to suppress the occurrence of stagnation in the ventilation mode. On the other hand, since the direction to the circulation outlet 14 in the clothing drying mode is strengthened, the performance in the clothing drying mode can also be improved while also improving the ventilation performance.

  Further, as shown in FIG. 3 and the like, an inclined guide surface 102 a is formed so that the center of the heater 18 is positioned outside the rotation center of the damper 16 and toward the outer end of the circulation outlet 14. Although the curvature of the inner peripheral surface 163 of the damper 16 is small, the force for directing the airflow toward the circulation outlet 14 is reduced, but the center of the heater 18 is biased outward from the rotation center of the damper 16. Further, by forming the inclined guide surface 102a facing the outer end of the circulation outlet 14, airflow can be smoothly ejected from the circulation outlet 14 even in the clothes drying mode using the damper 16. . In other words, since pressure loss on the circulation outlet 14 side can be reduced, unnecessary high-temperature air discharge to the ventilation port 12 side can be suppressed, so that clothes drying performance can be improved. is made of.

  Next, the partition member 20 will be described with reference to FIGS. 11 and 12. FIG. 11 shows a perspective view of the partition member 20 viewed from the lower side on the bathroom side, and FIG. 12 shows a perspective view of the partition member 20 viewed from the upper side on the blower 15 side. As shown in FIGS. 11 and 12, the partition member 20 includes a base plate 202 having an opening 202a corresponding to the suction port 151 of the blower 15 and an opening 202b formed to be connected to the suction port 11 outside the bathroom, An annular wall 201 erected in an annular shape so as to surround the periphery of the base plate 202 and a cover plate 203 that covers one side of the partition wall member 20 on the side outside the bathroom suction port 11 are provided. Moreover, there is an opening formed between the cover plate 203 and the base plate 201 on the blower 15 side of the space isolated by the cover plate 203 (the space between the cover plate 203 and the opening 202b). A damper 204 (second damper) is provided so as to cover the opening so as to be freely opened and closed. The opening provided with the damper 204 has an opening width wider than the opening 202 b connected to the outside bathroom suction port 11, and has an opening width wider than the suction port 151 of the blower 15. The damper 204 is configured to be swingable by a damper motor 205.

  The damper 204 is formed as a single damper, and is configured to open and close a flow path that connects the suction port 11 outside the bathroom to the suction port 151 of the blower 15. The damper 204 is swingably supported and fixed on the other end side (the filter side and the cover 30 side) of the partition member 20, and the opening area of the bathroom suction port 13 is increased by swinging so as to face the filter in the ventilation mode. The flow path from the outside bathroom suction port 11 to the suction port 151 of the blower 15 is narrowed and opened.

  In addition, the partition wall member 20 has an annular wall 201 formed in an annular shape so as to surround the suction port 151 of the blower 15, one end of the annular wall 201 is fixed to the main body case 10 via the base plate 202, and the other end is free. It is an end, and the other end is extended so as to be close to or abutting the filter, so that intake from the side in the direction toward the suction port 151 of the blower 15 is suppressed.

  Here, a partition member 20a, which is a modification of the partition member 20, is shown in FIG. In the partition member 20 a shown in FIG. 13, a damper 206 (third damper) is added to the partition member 20. The damper 206 is pivotally supported by a damper motor 207 so that the bathroom suction port 13 can be fully opened or partially closed.

  14 and 15 show a partition member 20b in which a cover plate 208 as a fixed cover is added to the partition member 20a. As shown in FIG. 15, in the partition member 20b, when the damper 204 swings to fully open the bathroom suction port 11 and the damper 206 partially closes the bathroom suction port 13, the cover plate 203, the cover plate 208, Since the gap between the two is narrowed and the pressure loss for sucking air from the bathroom side increases, the pressure loss for sucking air from the outside of the bathroom is relatively reduced, and the ventilation ratio between inside and outside the bathroom is equal. It is also possible to.

  Here, FIG. 16 shows the swinging state of the damper 204 and the damper 206. As shown in FIG. 16, the positions of the damper 204 and the damper 206 indicated by solid lines are the positions shown in FIG. The damper 204 swings to a position 204a indicated by a two-dot chain line when closing the outside-mouth suction port 11. The damper 206 swings to a position 206a or 206b indicated by a two-dot chain line when the bathroom suction port 13 is fully opened.

  Further, the cover plate 208 is provided with a plurality of holes 209 (second gap portions) so that air can be sucked through a filter from other than the gap portion between the cover plate 203 and the cover plate 208. It is composed. It is preferable that a damper 210 (fourth damper) is provided in each of the plurality of holes 209 to swing between a position indicated by a solid line and a position indicated by a two-dot chain line as 210a.

  If it is set as the above-mentioned structure, it will be provided with cover plates 203 and 208 as a pair of fixed covers arranged so as to cover both sides of the bathroom suction port 13 and a gap between the cover plates 203 and 208 The damper 204 and the damper 206 are arranged across the portion. When the circulation mode is executed, the damper 204 and the damper 206 open the gap (see FIG. 15). When the ventilation mode is executed, the damper 204 and the damper 206 are arranged. The damper 204 and the damper 206 can be swung so that the damper 206 narrows the gap portion.

  Further, the gap between the cover plates 203 and 208 is formed so as to be biased toward the outside suction port 11 side from the center of the suction port 151 of the blower 15, and the damper 204 fully closes the outside suction port 11. When the damper 204 is fully open the suction port 11 outside the bathroom, the blower 15 is used to suck the air from the gap portion. It can also be positioned to interfere.

  Further, when a filter is provided so as to cover the bathroom suction port 13 below the bathroom suction port 13, the damper 204 is swung to a fully open position, and the damper 206 is swung to a partially closed position (see FIG. 16), a predetermined space may be formed between the damper 204 and the damper 206 and the filter.

  Further, a hole 209 (second gap portion) is formed in the cover plate 208 so that air can be sucked through the filter from other than the gap portion when the ventilation mode is executed, and the damper 206 is provided to the hole 209. It is also possible to arrange a damper 210 (fourth damper) that exhibits the same function as in the above, so that the damper 210 does not fully close the hole 209 during execution of the ventilation mode.

  The blower motor FM and the damper motors 205 and 207 as described above are driven by control signals output from the control unit CU. A control block by the control unit CU is shown in FIG. As shown in FIG. 17, inputs from the remote controller 71 and the first and second temperature sensors 51 and 53 are received, a damper motor M1 for rotating the blower motor FM and the damper 16, a damper motor 205 and a damper 207 for rotating the damper 204. Is configured to give a command to the damper motor 207 and the heater 18. The control unit CU includes, for example, a processor and a memory, and performs a control as illustrated in FIG. 17 by executing a predetermined program.

  Next, the configuration of the cover 30 will be described with reference to FIGS. 18 and 19. FIG. 18 is a perspective view of the cover 30. FIG. 19 is an enlarged perspective view of the vicinity of the filter 33 of the cover 30.

  The cover 30 is a cover that covers the lower part of the main body case 10 on the bathroom side. The cover 30 includes an inner cover 32 located on the main body case 10 side and an outer cover 31 located on the bathroom side.

  The inner cover 32 is fixed to the main body case 10 by bolts 50 at four corners. The inner cover 32 is provided with a filter 33. A peripheral labyrinth wall 321 is formed on the outer periphery of the inner cover 32 so that a labyrinth structure can be formed with the main body case 10. The inner cover 32 is formed with a first louver labyrinth wall 322 and a second louver labyrinth wall 323 so that a labyrinth structure can be formed with the louver 19.

  The filter 33 is slidably inserted into a rail-shaped labyrinth groove 324 provided in the inner cover 32 so as to form a labyrinth structure with the inner cover. Further, the filter 33 is provided with a filter presser 34.

  By attaching the cover 30 configured as described above to the main body case 10, the space between the blower 15 as the blower and the filter 33 can be configured as a negative pressure generating unit.

  In the present embodiment, when the filter 33 is excessively clogged, the negative pressure of the negative pressure generating unit is increased and the downstream air that has passed through the heater 18 does not pass through the filter 33. It is possible to form a return flow path for returning the air flow to the blower 15 as a return airflow. The return flow path will be described with reference to FIGS. FIG. 20 is a plan view of the main body case 10 as seen from the bathroom side with the cover 30 removed. FIG. 21 is a cross-sectional view of the vicinity of the heater 18 from the blower 15.

  A peripheral labyrinth wall 103 is formed on the peripheral edge of the main body case 10, and a labyrinth structure is formed over the entire periphery by combining with the peripheral labyrinth wall 321 of the cover 30.

  A partition member 20 is disposed so as to surround the suction port 151 of the blower 15 that forms the core of the negative pressure generating portion, and constitutes a concentrated negative pressure generating chamber. As shown in FIG. 20, a notch 41 for negative pressure suction passage is formed on the heater 18 side of the partition wall member 20. The first louver labyrinth wall 322 is also formed with a notch 42 for negative pressure suction passage. Accordingly, when a negative pressure is generated in a portion surrounded by the partition wall member 20, a return airflow is generated along the arrow shown in FIG. This return airflow flows from the negative pressure suction passage cutout 42 toward the negative pressure suction passage cutout 41 to form a return flow passage. A temperature sensor 51 is disposed in the return flow path.

  As shown in FIG. 20, the blower 15 and the circulation outlet 14 (heater 18, louver 19) are diagonally arranged along the diagonal line of the main body case 10. The negative pressure suction passage cutout 42 on the louver 19 side is formed to have a relatively long length (substantially the same length as one side of the louver 19), and the negative pressure suction passage cutout 41 on the blower 15 side. Is formed relatively short. When the filter is clogged excessively and a large negative pressure is generated in the concentrated negative pressure generating chamber, the return airflow flows while converging toward the center of the blower 15, but in this embodiment, the negative pressure suction passage cutout 41 is further provided. In the present embodiment in which the temperature sensor 51 is arranged near the negative pressure suction passage cutout 41 in the present embodiment, the return airflow flows while further converging. The temperature sensor 51 can be reliably passed.

  The louver 19 is fixed to the heater case 17 by bolts. As shown in FIG. 20, the bolt fixing portions 181 and 182 of the louver 19 are equidistant from each other across the center. Therefore, in the case of the configuration shown in FIG. 20, the fastening force on the negative pressure suction passage notch 42 side is increased by fixing the bolt fixing portion 181 farther from the negative pressure suction passage cutout 42 on the louver 19 side. Can be reduced. More specifically, the airtightness between the heater case 17 and the louver 19 can be adjusted by the fastening force of a bolt (not shown in the figure, the same applies hereinafter). Therefore, the intended airtightness can be obtained only by fastening the bolt, the abnormal temperature can be accurately determined, and the assembly work can be facilitated. Moreover, the fastening force by the side of the air blower 15 can be restrained comparatively low by fastening with the volt | bolt the opposite side to the one side of the air blower 15 side. Therefore, the intended airtightness difference can be created with a simple structure, and the mounting direction can be easily changed. Furthermore, if only the bolt support portion (not shown in the figure) provided in the heater case 17 is provided so as to be biased only on the side opposite to the blower 15, errors in assembling work are reduced and the intended difference in airtightness is reduced. Can produce.

  In the case of the present embodiment, a thermal fuse 52 is provided at a position upstream of and above the negative pressure suction passage cutout 42 that serves as a portion for taking in air into the return flow path. Accordingly, when a negative pressure is generated and air is sucked from the negative pressure suction passage cutout 42, the temperature fuse 52 can be configured so that the air always passes. More specifically, as described above, the bathroom dryer DM according to the present embodiment has a large negative pressure when the clogging of the filter 33 proceeds excessively in the negative pressure generating portion formed between the blower 15 and the filter 33. At the same time, the high-pressure air that has passed through the heater 18 is reliably sucked by the large negative pressure that is generated, and is surely passed through the return flow path that does not pass through the filter 33. It is comprised so that it can return to the air blower 15. On the other hand, the role of the thermal fuse 52 is based on the temperature of heat propagated from the heater 18 by the thermal fuse 52 when the temperature rise around the heater 18 further progresses and the air flowing through the heater 18 disappears at all. By cutting off the circuit, it is possible to cope with a temperature rise based on a dangerous situation such as a blower lock of the blower 15. As described above, when the filter 33 is clogged, the return airflow is generated by the generation of the negative pressure in the negative pressure generating portion. With this arrangement, when there is suction due to negative pressure, air is actively flown in the vicinity of the thermal fuse 52, and the thermal fuse 52 is cut off when the blower 15 is driven. It is comprised so that can be prevented. A temperature sensor 53 is disposed in the vicinity of the inclined guide surface 102a.

It is a figure for demonstrating the arrangement | positioning aspect of the bathroom dryer of this embodiment. It is a figure for demonstrating the external appearance of the bathroom dryer of this embodiment. It is a figure for demonstrating the inside of a bathroom dryer. It is a figure for demonstrating the inside of a bathroom dryer. It is a figure for demonstrating the inside of a bathroom dryer. It is a figure for demonstrating the inside of a bathroom dryer. It is a figure for demonstrating the damper used for a bathroom dryer. It is a figure for demonstrating the damper used for a bathroom dryer. It is a figure for demonstrating the damper used for a bathroom dryer. It is a figure for demonstrating the damper used for a bathroom dryer. It is a figure for demonstrating the partition member used for a bathroom dryer. It is a figure for demonstrating the partition member used for a bathroom dryer. It is a figure for demonstrating the partition member used for a bathroom dryer. It is a figure for demonstrating the partition member used for a bathroom dryer. It is a figure for demonstrating the partition member used for a bathroom dryer. It is a figure for demonstrating the partition member used for a bathroom dryer. It is a figure for demonstrating the control part used for a bathroom dryer. It is a figure for demonstrating the cover used for a bathroom dryer. It is a figure for demonstrating the cover used for a bathroom dryer. It is a figure which shows the flow of the air at the time of negative pressure generation | occurrence | production. It is a figure which shows the flow of the air at the time of negative pressure generation | occurrence | production.

Explanation of symbols

10: body case 11: suction port outside the bathroom 12: ventilation port 13: bathroom suction port 14: circulation outlet 15: blower 16: damper 16a: damper 16b: damper 16c: damper 17: heater case 18: heater 19: louver 20 : Partition member 20a: partition member 20b: partition member 30: cover 31: outer cover 32: inner cover 33: filter 50: bolt 51: temperature sensor 52: temperature fuse 53: temperature sensor 71: remote control 101: ventilation air passage 101a: Facing wall portion 102: Circulating air passage 102a: Inclined guide surface 103: Peripheral labyrinth wall 1511: Suction port 152: Outlet port 161: Outer peripheral surface 162: Support portion 163: Inner peripheral surface 163a: Inner peripheral surface 163b: Inner peripheral surface 163c : Air directing part 163d: Inner peripheral surface 164: Rotating shafts 181 and 182: Bolt fixing part 201: Annular wall 201 Base plate 201: annular wall 202: base plate 202a: opening 202b: opening 203, 208: cover plate 204: damper 205, 207: damper motor 206: damper 208: cover plate 209: hole 210: damper 321: peripheral labyrinth wall 322: Louver labyrinth wall 323: Louver labyrinth wall 324: Labyrinth groove CU: Control unit D1: Duct DM: Bathroom dryer FM: Blower motor SR: Toilet SR1: Suction port SR2: Duct

Claims (8)

In a bathroom dryer provided with a circulation mode for sucking the air in the bathroom and ejecting the air in the direction of the bathroom via a heater, and a ventilation mode for sucking the bathroom air and discharging it outside the bathroom,
A body fixed to the ceiling of the bathroom;
A blower stored in the body;
A ventilation opening provided in the main body for discharging the air blown from the blower out of the bathroom;
A circulation outlet that is provided in the lower part on the bathroom side in the main body, and blows out the air blown from the transmitter into the bathroom,
A heater disposed in the circulation outlet;
A suction port provided on the lower side which is upstream of the blower in the main body and on the bathroom side, and which opens on the bathroom side;
A filter provided at the suction port;
A negative pressure generator provided between the blower and the filter,
The negative pressure in the negative pressure generating unit is configured to increase by causing the filter to become clogged, and
Due to the increase in the negative pressure, the downstream air that has passed through the heater is returned to the blower as a return airflow without passing through the filter, and returned so that the return airflow passes through the position of the temperature sensor that detects the temperature. A bathroom dryer comprising return channel forming means for forming a channel.   The return flow path forming means is characterized in that the blower and the circulation outlet are arranged apart from each other in the diagonal direction of the main body, and the temperature sensor is arranged on a diagonal line of the main body. Item 12. A bathroom dryer according to item 1.   The bathroom dryer according to claim 1 or 2, wherein the temperature sensor is arranged so as to be biased toward the blower from the circulation outlet.   2. The return flow path is configured such that downstream air that has passed through the heater is sucked and passes as a return airflow, while other outside air is sucked and does not pass. The bathroom dryer of any one of -3. A heater case that houses the heater and is fixed to the body;
A louver provided in the circulation outlet;
The bathroom dryer according to claim 4, wherein the return airflow intake portion is formed between the heater case or the heater case and the louver.   The return flow path has one end connected to the intake portion and the other end connected to the negative pressure generating portion, the upper surface is covered with the main body, and the lower surface is covered with a cover that covers a lower portion of the main body on the bathroom side. Thus, the bathroom dryer according to claim 4, wherein the bathroom dryer is configured as an airtight flow path in which outside air does not flow in from the middle. The negative pressure generating portion includes a concentrated negative pressure generating chamber separated by an annular standing wall extending from the main body to the vicinity of the filter,
The bathroom dryer according to claim 6, wherein a suction portion connected to the other end of the return flow path is provided on the circulation outlet side of the concentrated negative pressure generating chamber.   The bathroom dryer according to claim 7, wherein the length of the standing wall extending from the main body is shortened, and the tip of the standing wall is configured to maintain a predetermined distance from the filter.

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