JP2007232295A - Steam generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steam generator advantageous in an aspect of energy saving and even in an aspect of cost, capable of positively removing moisture in the device after steam generating operation by efficiently drying a device body interior or the like without providing a new member or the like. <P>SOLUTION: It is characterized by that it is provided with a heat exchanger capable of generating steam by diffusing hot water from a diffusing means arranged in a casing, an air blowing means arranged in a ventilation passage in the casing, and a control means for controlling operation of the air blowing means, and capable of setting a steam generating state of blowing out steam generated by the heat exchanger from the ventilation passage into a bathroom, and a device drying state of blowing air into the casing to dry a casing interior. The air blowing means is formed by a normally and reversely rotatable air blowing fan, the steam generating state is set by normally rotating the air blowing fan by the control means, and the device drying state is set by reversely rotating the air blowing fan. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a steam generator that is installed on a ceiling portion of a bathroom and the like and generates steam in the bathroom, and more particularly to a steam generator having an apparatus drying function for drying the interior of the apparatus.

Conventionally, in the case of a steam generator installed on the ceiling of a bathroom, for example, after a mist heating operation in which steam (mist) is blown into the bathroom, condensation in the apparatus body, grill plate or exhaust duct, and in a humidification tank In some cases, moisture may remain inside the apparatus main body due to retention of moisture due to surface tension between the fins of the heat exchanger and surface tension between fins of the heat exchanger. Therefore, in order to suppress the occurrence of various problems due to moisture, the inside of the main body of the steam generator and the inside of the exhaust duct are dried by a drying function of a ventilating / drying heater separately installed on the ceiling of the bathroom. In addition, as a ventilation dryer installed in the ceiling etc. of a bathroom, it is disclosed by patent document 1, for example.
JP 2000-14998 A

  However, in such a steam generator, moisture removal (that is, drying) inside the apparatus main body has a dedicated member such as a heater as in the ventilation dryer disclosed in Patent Document 1, for example, and the entire bathroom. It is difficult to partially dry the inside of the steam generator main body and the exhaust duct, and it is difficult to dry these parts in a short time. In addition to being inferior in terms of energy, the use of a high-power ventilation dryer is undesirable in terms of energy saving and cost.

  The present invention has been made in view of such circumstances, and its object is to efficiently dry the inside of the apparatus main body and the like without providing new members or the like to ensure moisture in the apparatus after the steam generation operation. It is an object of the present invention to provide a steam generator that can be removed easily and is advantageous in terms of energy saving and cost.

  In order to achieve such an object, the invention according to claim 1 of the present invention includes a heat exchanger that is disposed in the casing and can generate steam by diffusing hot water from the diffusion means, and the ventilation in the casing. A blower unit disposed in the passage, and controlling the operation of the blower unit to blow the steam generated by the heat exchanger from the ventilation passage into the bathroom, and to blow into the housing to blow the inside of the housing. And a control means that can be set to the dry state of the apparatus to be dried.

  According to a second aspect of the present invention, the blowing means is formed of a blowable fan that can be rotated forward and backward, and the blower fan is rotated forward by the control means so that the steam generation state is set and the blower fan is reversed. Is set to the dry state of the apparatus. The invention described in claim 3 is characterized in that a part of the blades of the blower fan is set in a direction opposite to the blown direction during forward rotation.

  Furthermore, the invention described in claim 4 includes hot water circulating means for collecting hot water diffused from the diffusing means in the heat exchanger into the tank, pumping the collected hot water with a circulation pump, and supplying the hot water again to the diffusing means. It is characterized by being ventilated by a ventilation means in the tank of the hot water circulation means. The invention according to claim 5 is characterized in that the remaining water collecting section provided in the tank is blown by a blowing means when the apparatus is in a dry state, and the invention according to claim 6 is characterized in that the remaining water is The circulation pump is arranged in the water collecting section. Furthermore, the invention described in claim 7 is characterized in that it includes a guide plate that guides the blowing of air into the housing by the blowing means when the apparatus is in a dry state.

  According to the first aspect of the present invention, by controlling the operation of the air blowing means arranged in the ventilation path in the housing by the control means, the steam generation state in which steam is blown into the bathroom and the air blowing in the housing. Therefore, it is possible to set the device in a dry state so that the inside of the housing can be dried, so that the air blowing means used for generating steam can also be used for drying the inside of the housing, and the inside of the housing is not provided with a new member for drying. Etc. can be efficiently dried and moisture in the device after the steam generation operation can be surely removed, and the energy saving effect of the device can be increased by using a small capacity (low output) air blowing means. An advantageous steam generator can be obtained.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, when the blowing fan that can be rotated forward and backward as the blowing means rotates forward, the steam generation state is set. Since the apparatus is set in the dry state by reversing, the structure for drying the inside of the housing can be simplified and an inexpensive steam generator can be obtained.

  Further, according to the invention described in claim 3, in addition to the effect of the invention described in claim 2, since a part of the blades of the blower fan is set in the direction opposite to the blowing direction during normal rotation, the blades By changing a part of the shape, the blowing force at the time of reverse rotation can be set to a predetermined value, and the drying efficiency inside the housing can be further enhanced.

  Further, according to the invention described in claim 4, in addition to the effects of the invention described in claims 1 to 3, since the air is blown from the blowing means into the tank of the hot water circulating means comprising the tank and the circulation pump, Thus, the residual water in the tank can be reliably dried and removed. In addition, since the hot water diffused from the diffusing means is collected and supplied to the diffusing means again, the water can be effectively used and the energy saving effect of the steam generator can be further enhanced.

  According to the invention described in claim 5, in addition to the effect of the invention described in claim 4, the remaining water collecting section is blown to the remaining water collecting section of the tank by the blowing means when the apparatus is in a dry state. The drying and removal efficiency of the residual water in the tank can be increased by blowing air in a state where the residual water is collected.

  According to the invention described in claim 6, in addition to the effect of the invention described in claim 4 or 5, since the circulation pump is disposed in the remaining water collecting part, the remaining water in the circulation pump is blown. It can be dried and removed by blowing air to the remaining water collecting section by means, and moisture removal inside the apparatus can be performed more easily and reliably.

  Furthermore, according to the invention described in claim 7, in addition to the effects of the inventions described in claims 1 to 6, since the induction plate for guiding the blowing into the housing by the blowing means when the apparatus is in a dry state, By the guide plate arranged at the position, the air from the air blowing means can be effectively circulated to a predetermined position inside the housing, and the inside of the apparatus can be dried more reliably.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 9 show an embodiment of a steam generator according to the present invention. FIG. 1 is a basic configuration diagram thereof, FIG. 2 is a schematic plan view of a specific configuration thereof, and FIG. 3 is a longitudinal section of an air passage portion. 4 and 5 are explanatory views of the blower fan, FIG. 6 is a plan view of the buffer tank, FIG. 7 is a view taken along the line AA in FIG. 6, and FIG. 8 is a view taken along the line BB in FIG. FIG. 9 and FIG. 9 are flowcharts showing an example of the operation.

  As shown in FIG. 1, the steam generator 1 includes two heat exchangers 3 and 4 arranged in a substantially vertical state within a housing 2 with a predetermined interval, and one heat exchanger 3 with a predetermined amount. A diffusion pipe 5 (diffusion means) for diffusing (including diffusing, discharging, jetting, jetting, spraying, spraying, etc.) hot water at a temperature; a buffer tank 6 for collecting hot water diffused by the diffusion pipe 5; Generated by the heat exchangers 3 and 4 disposed in a circulation pump 7 for pumping hot water in the buffer tank 6 and supplying it to the diffusion pipe 5 through a pipe, and a ventilation path 8 in the housing 2 formed by a partition wall or the like. The blower fan 9 (blower unit) that blows out the generated steam and warm air into the bathroom 13, the ventilation fan 10 connected to the housing 2 via the damper 11 that is opened and closed by the damper motor 11a, and the control board 12 (control unit) Etc.

  The heat exchanger 3 is mainly used for generating steam, and as shown in FIGS. 2 and 3, a large number of fins 3a arranged in parallel at regular intervals, and supports disposed at both ends of the fins 3a. It consists of a plate and fins 3a and a hot water supply pipe 3b bent in a meandering manner to support the support plate. Further, the heat exchanger 4 is used for generating hot air, and, like the heat exchanger 3, is constituted by fins 4a, a support plate, a hot water supply pipe 4b, and the like. As shown in FIG. 1, the hot water supply pipes 3 b and 4 b of the heat exchangers 3 and 4 include a circulation forward pipe 15 a and a circulation return pipe 15 b connected to a heat source machine (not shown) with a hot water circulation function. Are connected via thermal valves 16a and 16b.

  The circulation pump 7 is a switchable pump that discharges hot water drawn up from the buffer tank 6 in two directions. The diffusion pipe 5 is connected to one discharge port via a pipe, and the other discharge port is connected to the circulation pump 7. A drain pipe 17 is connected. Then, according to the control signal of the control board 12, the circulation pump 7 is rotated forward and switched to the diffusion side, and the circulation pump 7 is rotated at a predetermined rotation speed, so that the pumped hot water is diffused from the diffusion pipe 5 to the heat exchanger 3. In addition, the circulating pump 7 is reversed and switched to the drain side, and is rotated at a predetermined rotational speed, so that the pumped hot water is drained outside the bathroom 13 through the drain pipe 17.

  The buffer tank 6 is disposed below the heat exchangers 3 and 4, is connected to a water supply pipe 18 to which a water supply electromagnetic valve 19 is connected, and also includes a float switch 20 that detects the level of hot water in the buffer tank 6, A water temperature sensor 21 for detecting the temperature of hot water in the buffer tank 6 is disposed. A heater 22 for drying the inside of the buffer tank 6 is disposed on the outer surface of the bottom wall of the buffer tank 6. The buffer tank 6, the circulation pump 7 and the like constitute hot water circulation means of the present invention.

  The blower fan 9 is formed of, for example, a cross flow fan capable of rotating forward and backward, and is formed in the housing 2 between the air inlet 23a and the air outlet 23b of the grill plate 23 attached to the lower surface opening of the housing 2. It arrange | positions in the ventilated path 8 made. For example, as shown in FIG. 4, the blower fan 9 is formed in a curved surface shape (fan shape) in which the blades 9 b are recessed with respect to the forward rotation direction of the fan motor 9 a, and the fan motor 9 a is indicated by an arrow a. As shown in FIG. 2, the air flow is generated (blowed) as indicated by the arrow C in FIG. 2, and the blower fan motor 9a is rotated reversely as indicated by the arrow B. It is configured to be able to blow as indicated by the arrow D.

  The form of the blades 9b of the blower fan 9 is not limited to the example of FIG. 4, and as shown in FIG. 5, the portion A of the blower fan 9 is in the direction of arrow A, which is the forward rotation direction of the fan motor 9a. In contrast to the concave curved shape, the portion B can be a curved shape that is concave with respect to the direction of the arrow B, which is the reverse direction of the fan motor 9a. It is. Further, as shown in an enlarged view in FIG. 4, one to several of the blades 9b1 are set in a curved shape that is swollen with respect to the rotational direction and set to a shape opposite to the blowing shape, or a flat blade 9b2. An appropriate form can be used in which a predetermined air volume can be obtained in a direction opposite to the forward direction, such as providing a predetermined position.

  The ventilation fan 10 is formed of, for example, a sirocco fan or the like, and forms a ventilation passage in the housing 2 between the air inlet 23a and the ventilation fan 10 by rotation of the fan motor 10a (see FIG. 2). It is configured. Further, as shown in FIG. 1, a louver 24 is disposed at the outlet 23b of the grill plate 23 so as to be opened and closed by the rotation of the louver motor 24a. In addition, an intake air temperature sensor 25 is disposed in the vicinity of the intake port 23a, and for example, a heating / warm water sensor 27 is disposed in the hot water supply pipe 3b of the heat exchanger 3, and is further disposed at a predetermined position outside the housing 2. Is provided with an outside air temperature sensor 26.

  And each component, such as the heat exchangers 3 and 4, the buffer tank 6, the circulation pump 7, and the ventilation fan 9, is arrange | positioned in the said flat thin housing | casing 2 as shown in FIG.2 and FIG.3. The steam generator 1 itself is formed in a flat and thin shape, and as shown in FIG. 1, for example, the casing 2 and the ventilation fan 10 are installed outside the bathroom 13 on the ceiling panel 13 a of the bathroom 13. ing. At this time, the buffer tank 6 constituting the hot water circulating means is configured as shown in FIGS.

  That is, as shown in FIG. 6 (and FIG. 2), the buffer tank 6 is formed in a substantially T shape in plan view by the recovery part 6 a and the storage part 6 b, and the recovery part 6 a is adjacent to both the heat exchangers 3 and 4. The storage part 6b is arranged on one side in the longitudinal direction of the heat exchangers 3 and 4 (the rear part of the housing 2). In addition, as shown in FIG. 7A, the buffer tank 6 has a bottom portion of the collecting portion 6a formed in a mortar shape, so that a remaining water collecting portion 30 is formed at the deepest portion thereof. The remaining water collecting section 30 is not limited to the shape shown in FIG. 7 (a), and is formed into a shape having two mortar portions, for example, as shown in FIG. 7 (b). An appropriate shape capable of collecting and storing the remaining water W, such as a configuration having the water portion 30, can be employed.

  Further, as shown in FIG. 8, the storage portion 6 b of the buffer tank 6 also has a mortar-shaped residual water collecting portion 31 having a predetermined portion that is one step lower and a flat bottom surface, and the residual water collecting portion 31 is disposed on the residual water collecting portion 31. A circulation pump 7 is arranged. Thus, when the circulation pump 7 is switched to the drain side, hot water stored in the storage unit 6b is pumped up and drained by the circulation pump 7 and is later described in the buffer tank 6 by the reverse rotation of the blower fan 9. Thus, when the warm air is blown, the residual water W in the residual water collecting section 31 and the residual water in the circulation pump 7 are dried and removed.

  The control board 12 is connected to the output side thereof with a circulation pump 7, various on-off valves 16a, 16b, 19 and various motors 9a, 10a, 11a, 24a, a heater 22 and the like, and various sensors 21 on the input side. 25, 26, 27, and re-commons 32, 33 outside the bathroom or in the bathroom (see FIG. 1). The steam generator 1 is configured to be operable in, for example, four operation modes of “mist heating”, “dry heating”, “drying”, and “ventilation” by the control signal of the control board 12.

  Next, an example of operation | movement of the steam generator 1 concerning this invention is demonstrated based on the flowchart of FIG. First, the present invention enables a mist heating operation in which the steam generated as described above is blown into the bathroom 13 so that the bath 13 can be bathed in a mist heating state. The mist heating operation is as follows. Is done.

  That is, when a mist heating switch (not shown) of the remote controllers 32 and 33 is turned on, the water supply electromagnetic valve 19 is opened and water is supplied into the buffer tank 6, and the circulation pump 7 is turned on (actuated) to turn on the buffer tank tank 6. The water is pumped up by the circulation pump 7 and diffused from the diffusion pipe 5 onto the heat exchanger 3, that is, hot water circulates in the hot water circulation means. Steam circulates when the circulating hot water reaches a predetermined temperature and is diffused to the heat exchanger 3, and the steam flows through the ventilation path 8 as shown by arrows C in FIGS. It blows out in the bathroom 13 from the blower outlet 23b of the board 23, and, thereby, the inside of the bathroom 13 is set to a mist heating state.

  Then, as shown in FIG. 9, for example, when the mist heating operation is terminated (S101) by turning off the mist heating switch or the like, the apparatus drying operation is automatically started (S102). Reverse (S103). By the reverse rotation of the blower fan 9, the air in the ventilation path 8 flows in the direction of the heat exchanger 4, and a part of the air is blown into the buffer tank 6 as shown by the arrow D in FIG. It will be sent to the whole area. When the blower fan 9 is reversed, it is determined whether or not the time T previously stored in the control board 12 has elapsed (S104), and this determination S104 is repeated until "YES" is reached.

  Since the heat exchangers 3 and 4 have residual heat immediately after the end of the mist heating operation due to the reversal of the predetermined time T of the blower fan 9, the blown air becomes hot air due to the residual heat, and the hot air causes the buffer tank 6 to The inside and the housing 2 are dried. At this time, since the remaining water is collected in the remaining water collecting sections 30 and 31 provided on the bottom surface of the recovery section 6a and the storage section 6b of the buffer tank 6, the warm air blown into the buffer tank 6 is It can concentrate on the residual water W in the residual water collection parts 30 and 31, and the residual water W in the residual water parts 30 and 31 will be dried and removed.

  And if it becomes "YES" by judgment S104, the ventilation fan 9 will stop (S105) and an apparatus drying operation will be complete | finished (S106). That is, when the mist heating operation is completed, the blower fan 9 reverses by a predetermined time T, and the apparatus drying operation for drying by blowing hot air into the housing 2 is automatically executed. The remaining water W and moisture such as condensation adhering to the inside of the housing 2 are dried and removed.

  In the above flowchart, the case where the apparatus drying operation is automatically executed after the completion of the mist heating operation has been described. However, for example, the remote controller 30, 31 is dedicated to the apparatus drying operation and the operation is prohibited during the mist heating operation. For example, during the drying operation of the apparatus, the ventilation fan is operated and the warm air blown into the housing 2 is supplied to the ventilation passage. May be discharged outside the bathroom 13 through an exhaust duct (not shown). Further, during the apparatus drying operation, at least one of the heat exchangers 3 and 4 is operated by supplying hot water from a heat source device with a hot water circulation function, and hot air is actively blown into the housing 2 to perform drying efficiency. You may make it raise.

  Thus, in the steam generator 1 of the said embodiment, the mist heating which blows off steam in the bathroom 13 by rotating forward or reverse the ventilation fan 9 arrange | positioned in the ventilation path 8 in the housing | casing 2 is carried out. Since the operation state and the apparatus drying operation state in which the air is blown into the housing 2 and dried inside the housing 2 can be set, the blower fan 9 used for generating steam can be used for drying the housing 2. Thus, without providing a new member such as a heater for drying as in the prior art, the inside of the housing 2 is efficiently dried so that the moisture in the steam generator 1 after the mist heating operation is reliably and efficiently Can be removed.

  Further, if a part of the blade 9b of the blower fan 9 is set in the reverse direction, the blowing force at the time of reverse rotation can be set to a predetermined value by changing a part of the shape of the blade 9b. The drying efficiency of can be increased. Moreover, since the residual water collection parts 30 and 31 are provided in the collection | recovery part 6a and the storage part 6b of the buffer tank 6, the state which collected the residual water W in the buffer tank 6 in the residual water collection parts 30 and 31 Since the circulation pump 7 is disposed in the remaining water storage unit 31, the remaining water in the circulation pump 7 can be dried and removed by blowing with the blower fan 9. Accordingly, it is possible to more easily and reliably remove moisture from the inside of the housing 2.

  Furthermore, if the ventilation fan 10 provided in the housing | casing 2 is operated at the time of apparatus drying operation, the warm air ventilated in the housing | casing 2 can be discharged | emitted out of the bathroom 13 from a ventilation passage through an exhaust duct. In addition, drying in the discharge duct can be performed simultaneously with drying in the housing 2. Further, by configuring so that the apparatus drying operation is automatically executed after the mist heating operation is completed, the apparatus drying is surely executed, and the state of the steam generator 1 at the next use is always clean. Therefore, the operation during the apparatus drying operation becomes unnecessary, and the steam generator 1 excellent in usability can be obtained.

  Moreover, since the fan for ventilation arrange | positioned in the housing | casing 2 needs only the comparatively small capacity | capacitance (low output) ventilation fan 9 used for mist heating operation, the energy-saving effect of the steam generator 1 is improved. The inside of the housing 2 is dried because the mist heating operation state is set by the forward rotation of the blower fan 9 that can be rotated forward and reverse, and the apparatus drying operation state is set by the reverse rotation of the blower fan 9. This makes it possible to obtain a steam generator 1 that is inexpensive and advantageous in terms of cost. Furthermore, since it has a hot water circulation means comprising a buffer tank 6 and a circulation pump 7 that circulates and uses the hot water diffused in the heat exchanger 3, the hot water diffused from the diffusion pipe 5 is supplied to the diffusion pipe 5 again to supply hot water. It can be reused and the water can be used effectively, and the energy saving effect of the steam generator 1 can be further enhanced.

  By the way, in the said embodiment, as shown, for example with the dashed-two dotted line of FIG. 3, the guide plate 34 is rotatably arrange | positioned in the appropriate position in the channel | path 8 in the housing | casing 2, and this guide plate 34 is mist heating operation | movement. It is sometimes arranged so as not to affect the blowing of steam or the like, and can be rotated so as to guide the warm air to the buffer tank 6 during the apparatus drying operation. If comprised in this way, it can distribute | circulate the ventilation from the ventilation fan 9 effectively to the inside of the ventilation path 8 or the other housing | casing 2 by the guide plate 34 arrange | positioned in the predetermined position (predetermined angle), and the inside of the housing | casing 2 It is possible to dry the entire area of the substrate more reliably. In this case, the number of the guide plates 34 can be set to an appropriate number of one or more according to the location where condensation occurs.

  Further, as shown by a two-dot chain line in FIG. 3, a condensation collection basket 35 is provided at the opening end portion of the housing 2 where the grill plate 23 is mounted, and the condensation W1 collected in the condensation collection bowl 35 is blown to It can also be dried and removed (or naturally dried) by blowing warm air by reversing the fan 9. If comprised in this way, the dripping of the condensation on the inner surface of the housing | casing 2 in the bathroom 13 which is the downward direction via the grill plate 23 will be prevented, and comfortable mist heating bathing etc. will be attained. The arrangement position of the dew condensation collecting bowl 35 is not limited to the illustrated example. For example, the condensation collection bowl 35 may be provided on the grill plate 23 itself, or may be provided at an appropriate position in the housing 2 corresponding to the air inlet 23a or the outlet 23b of the grill plate 23. it can. Thus, this invention can employ | adopt the suitable shape, arrangement | positioning of a member, etc. which can dry and remove the water | moisture content, such as the residual water W and dew condensation W1, by the ventilation by reverse rotation of the ventilation fan 9. FIG.

  In addition, the structure of the heat exchangers 3 and 4 in the said embodiment is not restricted to the structure of the same form which has a hot water supply pipe | tube as a fin and a heating means, For example, each heat exchanger 3 and 4 is comprised in a different form. The heating means of both heat exchangers 3 and 4 is not limited to the hot water supply pipe, and other appropriate heating means can be adopted, and further, there is a heating means for directly supplying hot water from an appropriate heat source machine. No heat exchanger can be adopted. Moreover, the installation position in the bathroom 13 of the steam generator 1 in the above embodiment is not limited to the ceiling panel 13a, and can be installed, for example, on the ceiling portion of the upper end portion of the wall panel and the corner portion of the ceiling panel. In the embodiment, the entire buffer tank 6 or the shape of the collection unit 6a and the storage unit 6b itself is an example. For example, a rectangular buffer tank 6 is used in a plan view, or the lower outside of the buffer tank 6 is covered. Thus, a buffer tank 6 or the like having an appropriate shape can be used according to the space shape in the housing 2 or the like, such as adopting a configuration with a waterproof pan attached thereto.

  The present invention is not limited to a steam generator that is installed on the ceiling or the like of a bathroom and collects and circulates the hot water diffused in the heat exchanger, but is disposed in the counter of a bathroom washroom, for example, and diffused and hot water It can also be applied to steam generators that drain water directly.

1 is a basic configuration diagram showing an embodiment of a steam generator according to the present invention. Schematic plan view showing the specific configuration of the same Longitudinal sectional view of the ventilation passage Explanatory drawing of the blower fan Explanatory drawing of other blower fans Top view of the buffer tank AA arrow view of FIG. BB line view of FIG. 6 Flow chart showing an example of the same operation

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Steam generating device, 2 ... Housing | casing 3, 4 ... Heat exchanger, 5 ... Diffusion pipe, 6 ... Buffer tank, 6a ... Recovery part, 6b ... Storage part, 7 ... Circulation pump, 8 ... Ventilation path, 9 ... Blower fan, 9a ... Fan motor, 9b ... Blade, 10 ... Ventilation fan, 12 ... Control board , 13 ... Bathroom, 13a ... Ceiling panel, 22 ... Heater, 23 ... Grill plate, 23a ... Inlet, 23b ... Outlet, 30, 31 ... Remaining water storage 34, guide plate, 35 ... dew condensation recovery tank, W ... residual water, W1 ... dew condensation.

Claims (7)

  A heat exchanger arranged in the housing and capable of generating steam by diffusing hot water from the diffusing means, a blowing means arranged in the ventilation path in the housing, and controlling the operation of the blowing means, And a control means that can be set to a steam generation state in which steam generated by a heat exchanger from a ventilation path is blown into a bathroom and a device dry state in which air is blown into the casing to dry the casing. Steam generator.   The blower means is formed by a blower fan that can be rotated forward and backward, and is set to the steam generation state when the blower fan rotates forward by the control means, and is set to the apparatus dry state by the reverse rotation of the blower fan. The steam generator according to claim 1, wherein   The steam generator according to claim 2, wherein a part of the blade of the blower fan is set in a direction opposite to a blown direction during forward rotation.   The heat exchanger includes hot water diffused from the diffusing means in the tank, and also includes hot water circulating means for pumping the collected hot water with a circulation pump and supplying the recovered hot water to the diffusing means again. The steam generator according to any one of claims 1 to 3, wherein the steam is blown by a blowing means.   The steam generator according to claim 4, wherein the remaining water collecting section provided in the tank is blown by a blowing means when the apparatus is in a dry state.   The steam generator according to claim 4 or 5, wherein the circulation pump is arranged in the remaining water collecting part.   The steam generator according to any one of claims 1 to 6, further comprising a guide plate that guides air blown into the housing by the blower when the apparatus is in a dry state.

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