JP2006275365A - Steam generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steam generator capable of efficiently generating sufficient amount of steam while circulating and using hot water for generating steam in a clean condition and being favorably installed in a ceiling part of a bathroom. <P>SOLUTION: This steam generator is provided with a heat exchanger for generating steam by diffusing hot water from a diffusion means, a hot water circulation means for recovering hot water diffused in the heat exchanger into a tank and supplying hot water to the diffusion means, and a water drain means for draining hot water in the tank. Water is supplied into the tank of the hot water circulation means and the water drain means is operated to drain water remaining in the tank before starting operation of the heat exchanger. The tank has a gutter part for recovering hot water flowing down from the heat exchanger and a storage part which is provided continuously with the gutter part and in which a circulation pump for supplying hot water to the diffusion means and a drainage pump are arranged. <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 generates steam in the bathroom.

Conventionally, as a steam generator installed on the ceiling of a bathroom, for example, Patent Document 1 discloses. In the mist device (steam generating device) disclosed in Patent Document 1, a heat exchanger is disposed in an inclined state in a horizontally long apparatus main body, and a suction port is provided on the primary side of the heat exchanger and on the secondary side. A circulation fan is provided, and hot air heated to a high temperature by the heat exchanger is blown into the bathroom by the operation of the circulation fan. Further, a mist spraying means composed of a hot water supply pipe and a plurality of spray nozzles is disposed outside the vicinity of the suction port of the grill that closes the opening of the apparatus main body, and the mist (steam) from the mist spraying means into the bathroom. Is made to eject directly.
JP 2002-336327 A

  However, in such a steam generator, since the heat exchanger arranged in the main body of the apparatus does not generate steam, the hot water supplied from the water heater to the hot water supply pipe is ejected from the ejection nozzle as a mist. It is necessary to provide a mist jetting means that protrudes into the bathroom at the opening end of the apparatus main body, and it is difficult to generate a sufficient amount of steam in the bathroom in a short time. In addition, the design of the bathroom ceiling is not preferable.

  The present invention has been made in view of such circumstances, and the object thereof is to efficiently generate a sufficient amount of steam while circulating and using hot water for generating steam in a clean state, and in the bathroom. An object of the present invention is to provide a steam generator that can be suitably installed on a ceiling portion or the like.

  In order to achieve such an object, the invention described in claim 1 of the present invention includes a heat exchanger capable of generating steam by diffusing hot water from the diffusing means, and hot water diffused in the heat exchanger. A steam generator comprising a hot water circulation means for collecting in the tank and supplying the diffusion means, and a drain means for draining the hot water in the tank, before the steam generation by the heat exchanger, Water is supplied into the tank of the hot water circulation means and the drainage means is operated to drain the remaining water in the tank.

  The invention according to claim 2 operates the drainage means simultaneously with the supply of water into the tank or after a predetermined time, and supplies water into the tank again after the drainage is completed to supply hot water to the diffusion means. Is preferably supplied. Further, as in the invention described in claim 3, the tank is provided with a flange portion that collects hot water flowing down from the heat exchanger, and a circulation pump that is connected to the flange portion and supplies hot water to the diffusion means. It is preferable that the drainage means is disposed in the deepest part on the bottom side of the storage part. Further, as in the invention described in claim 4, it is preferable that the residual water is heated by a heating means disposed on the bottom surface of the tank before the steam is generated by the heat exchanger and before the water is supplied to the tank.

  According to the first aspect of the present invention, before steam is generated by the heat exchanger, water is supplied into the tank of the hot water circulation means and the remaining water in the tank is drained by the drainage means. The residual water in the tank at the end of operation can be drained while diluting, for example, hot water containing bacteria etc. can be reliably drained to the outside before operation, and the hot water for generating steam can be kept clean. A sufficient amount of steam can be efficiently generated by the heat exchanger, and it can be suitably installed on the ceiling of the bathroom.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the drainage means is operated simultaneously with the supply of water into the tank or after a predetermined time, and the tank is again discharged after the drainage is completed. Since the hot water is supplied to the diffusion means by supplying water into the interior and operating the circulation pump, etc., the water supply to the tank, the drainage and the operation of supplying the hot water to the diffusion means can be reliably performed according to a predetermined procedure. Thus, the hot and cold water for generating steam can always be kept clean.

  Further, according to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the tank has a flange portion for collecting hot water flowing down from the heat exchanger, and is connected to the flange portion. And a storage part in which a circulation pump for supplying hot water to the diffusion means is disposed, and the drainage means is disposed in the deepest part on the bottom side of the storage part, so that the remaining water in the storage part of the tank is in the deepest part. The water can be reliably drained by the drainage means in a state of collecting and reducing the amount of water, and the amount of residual water in the tank itself can be reduced, and the residual water can be diluted and reliably drained by the supplied water. The hot water for generation can be kept clean.

  Further, according to the invention described in claim 4, in addition to the effects of the invention described in claims 1 to 3, it is arranged on the bottom surface of the tank before supplying water to the tank before generating steam by the heat exchanger. Since the residual water is heated by the heating means, the residual water sterilized by the heating means can be drained while being diluted with clean water supplied to the tank, and the tank is kept clean and used for steam generation. Further cleaning can be achieved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 7 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 perspective view showing an installation state in a bathroom, and FIG. 3 is a diagram of the steam generator. 4 is a schematic plan view showing a specific configuration, FIG. 4 is a view taken along line AA in FIG. 3, FIG. 5 is a longitudinal sectional view of the buffer tank, FIG. 6 is a plan view thereof, and FIG. It is a timing chart which shows.

  As shown in FIG. 1, a steam generator 1 according to the present invention includes a first heat exchanger 4 in which a large number of fins 4a are connected by a hot water supply pipe 4b, and a large number of fins 5a that are connected to a hot water supply pipe 5b. The steam and hot air generated by the second heat exchanger 5 and the first heat exchanger 4 and the second heat exchanger 5 are connected to the bathroom from the outlet 3b of the grill plate 3 (see FIG. 4). A blower fan 6 that blows out inside, a hot water circulating means 7 that collects hot water diffused on the first heat exchanger 4 and diffuses it again into the first heat exchanger 4, a ventilation fan 8, and the like are provided. .

  The hot water circulating means 7 is a diffusion pipe 9 as a diffusing means for diffusing hot water of a predetermined temperature on the fins 4a of the first heat exchanger 4 (including diffusion, discharge, jetting, jetting, spraying, spraying, etc.). And a buffer tank 10 as a tank for recovering the hot water diffused by the diffusion pipe 9, a circulation pump 11 that pumps up the hot water in the buffer tank 10 and supplies it to the diffusion pipe 9 through the pipe 12. ing.

  At this time, the buffer tank 10 includes a shallow-bottom bowl-shaped flange 10a that collects hot water flowing down from the first heat exchanger 4, and a deep-bottom storage section 10b that is connected to the flange 10a. A drainage pump 13 having the circulation pump 11 and a drainage pipe 14 connected thereto is disposed in the storage portion 10b. A water supply pipe 15 to which a water supply electromagnetic valve 16 is connected is connected to a predetermined position of the buffer tank 10.

  Furthermore, a hot water supply pipe 17a and a hot water supply return pipe 17b are connected to the hot water supply pipe 4b of the first heat exchanger 4 and the hot water supply pipe 5b of the second heat exchanger 5, respectively. Is connected to a hot water solenoid valve 18. The hot-water supply piping 17 a and the hot-water supply return piping 17 b are connected to a hot water supply 19 such as a kerosene boiler with a circulation function or a gas hot water supply, and the water supply piping 15 is connected to a water supply or a water supply pipe in the hot water supply 19. ing.

  The blower fan 6 is formed of, for example, a sirocco fan, a cross flow fan, or the like, and is configured to form a ventilation path 20 between the air inlet 3a and the air outlet 3b of the grill plate 3 by rotation of the fan motor 6a. Has been. Further, the ventilation fan 8 is formed by, for example, a sirocco fan or the like disposed in the fan case 8c, and a housing is formed between the intake port 3a and the discharge port 8b of the ventilation fan 8 by rotation of the fan motor 8a. A ventilation passage 21 is formed through a connection port 23 provided in FIG. A louver 22 is disposed at the outlet 3b of the grill plate 3 so as to be opened and closed by the rotation of the louver motor 22a.

  Then, by arranging these components in the flat and thin casing 2, the steam generator 1 itself is formed in a flat and thin shape, and a wireless or wired remote control 25 is provided in the casing 2. Is connected to the control device 24. The control device 24 is connected to the output side thereof with the circulation pump 11, drainage pump 13, various solenoid valves 16, 18 and various motors 6a, 8a, 22a, etc. The remote controller 25 is connected. 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 device 24.

  The steam generator 1 configured as described above is installed on the ceiling of the bathroom as shown in FIG. That is, the flat and thin casing 2 is suspended and installed on a ceiling panel 28 above the bathtub 27 that forms the bathroom ceiling, for example, by a plurality of suspension bolts on a building frame (not shown) above the bathroom 26. The hot water supply pipe 17a, the hot water return pipe 17b, and the water supply pipe 15 are arranged on the upper surface (back of the ceiling) of the ceiling panel 28, and the drainage pipe 14 is passed through the outer surface of the wall panel 29 of the bathroom 26 from the upper surface of the ceiling panel 28. Place the drain outlet at the bottom on the waterproof pan in the bathtub apron. Further, various cables 30 drawn from the housing 2 are wired on the upper surface side of the ceiling panel 28, and a ventilation duct 31 connected to the discharge port 8b of the ventilation fan 8 is disposed on the upper surface side of the ceiling panel 28, thereby The steam generator 1 is installed on the ceiling panel 28 of the bathroom 26.

  3 to 6 show a specific structure of the steam generator 1. In the following description, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals. As shown in FIGS. 3 and 4, the steam generator 1 has the casing 2 described above, and a grill provided with the inlet 3 a and the outlet 3 b in the lower surface opening 2 a of the casing 2. A plate 3 is detachably mounted. Further, the ventilation path 20 is formed in the housing 2 so as to communicate with the air outlet 3b of the grill plate 3 from the air inlet 3a of the grill plate 3 by a partition wall 2b having a predetermined shape, and as shown in FIG. The first heat exchanger 4 is disposed on the left side of the port 3a (upstream side) in a downwardly inclined manner, and the second heat exchanger 4 is in a state where the lower ends of the first heat exchanger 4 are adjacent to the left side of the first heat exchanger 4. By arranging the heat exchanger 5 in an upwardly inclined state, the first heat exchanger 4 and the second heat exchanger 5 have a V-shape in a side view in the ventilation path 20 of the housing 2. Are arranged.

  Note that the blower fan 6 is disposed on the downstream side of the heat exchanger 5 with a predetermined gap in the second heat exchanger 5 on the outlet 3b side (downstream side) of the ventilation path 20. By setting the blower fan 6 to rotate as indicated by an arrow A in FIG. Further, as shown in FIG. 3, the ventilation fan 8 is disposed in a state where the fan case 8 c protrudes to the side of the housing 2, and is disposed at a connection port 23 provided on the side wall of the housing 2. It communicates with the inside of the housing 2 through 23a (see FIG. 1). When the fan motor 8a rotates, the air in the bathroom 26 sucked from the air inlet 3a of the grill plate 3 is converted into a ventilation passage (not shown), the connection port 23, the ventilation fan 8 in the housing 2. In addition, the ventilation passage 21 is formed by being discharged into the ventilation duct 31 through the discharge port 8b.

  Further, the buffer tank 10 is disposed below the first heat exchanger 4 and the second heat exchanger 5 in the housing 2. As shown in FIGS. 5 and 6, the buffer tank 10 has the bottom surface of the flange portion 10a formed as an inclined surface and a substantially rectangular shape in plan view. The bottom surface of the covered storage portion 10b is also formed by two inclined surfaces such that the substantially central portion in the longitudinal direction is the deepest portion 10c. And the drain pump 13 is arrange | positioned in the deepest part 10c of the storage part 10b, the circulation pump 11 is arrange | positioned to the side of this drain pump 13, and the water supply solenoid valve is located on the upper end part side of the inclined surface of the storage part 10b. A water supply port 15a of the water supply pipe 15 to which 16 is connected is disposed. The drainage pump 13 has a dimension in which the suction port 13a provided on the lower surface side does not adversely affect the suction with respect to the bottom surface of the deepest portion 10c. It is attached.

  The circulation pump 11 and the drainage pump 13 disposed in the buffer tank 10 and the water supply electromagnetic valve 16 of the water supply pipe 15 connected to the buffer tank 10 are operated by the control device 24 as shown in FIG. That is, when an operation switch (operation SW) (not shown) provided in the remote controller 25 for mist heating operation is turned on, the water supply electromagnetic valve 16 is first turned on (opened) for a predetermined time after a predetermined time, and the water supply port of the water supply pipe 15 is turned on. Water (tap water) is supplied (discharged) from 15a toward the inclined bottom surface of the reservoir 10b as shown by arrow C in FIG.

  By supplying this water, a predetermined amount of water is stored in the storage unit 10b of the buffer tank 10, and the remaining water W (see FIG. 5) that cannot be sucked by the drain pump 13 at the bottom of the storage unit 10b during the previous operation. 5) is diluted. Note that the amount of water supplied at this time is set to an amount that can sufficiently dilute the remaining water W in the reservoir 10b. Moreover, since the water supplied from the water supply port 15a is discharged toward the inclined surface with a large inclination angle of the bottom surface of the storage portion 10b, the water is vigorously mixed with the remaining water W to obtain a good diluted state. Will be.

  When the water supply solenoid valve 16 is turned on for a predetermined time and turned off (closed), the drain pump 13 is turned on (actuated) simultaneously with this turning off, and the water supplied from the suction port 13a into the storage portion 10b of the buffer tank 10 is supplied. Is sucked and drained through the drain pipe 14 onto the waterproof pan inside the bathtub apron of the bathroom 26. In this drainage, the residual water W in the storage unit 10b is diluted with the water supplied from the water supply pipe 15. For example, bacteria and the like breed in the residual water W of the storage unit 10b after the previous operation is completed. Even if it is, it is drained to the outside together with the water supplied through the water supply pipe 15, so that before the mist heating operation of the steam generator 1 (before the steam is generated by the first heat exchanger 4). Thus, the inside of the buffer tank 10 is cleaned.

  When the drain pump 13 is turned on for a predetermined time and all the residual water W diluted with water is drained to the outside, the water supply electromagnetic valve 16 is turned on again for a predetermined time, and the water used in the current mist heating operation is buffered. It is supplied into the tank 10. When the circulation pump 11 is turned on (operated), the water in the buffer tank 10 circulates in the hot water circulation means 7, and hot water is circulated and supplied from the hot water heater 19 to the hot water supply pipe 4a simultaneously with the operation switch being turned on. The first heat exchanger 4 is used to convert the water into hot water having a predetermined temperature, which is diffused from the diffusion pipe 9 onto the fins 4a of the first heat exchanger 4 to generate steam (mist). Then, by the operation of the blower fan 6, the steam flows through the ventilation path 20 and is blown into the bathroom 26 from the outlet 3 b of the grill plate 3, and the bathroom 26 is in a mist heating state.

  The water supply electromagnetic valve 16 is turned on for a predetermined time to replenish water in the buffer tank 10 when the hot water in the buffer tank 10 falls below a predetermined water level due to the generation of steam. Further, when the operation switch is turned off, the drain pump 13 is turned on after a predetermined time, and the hot water remaining in the storage portion 10b of the buffer tank 10 is drained to the outside. That is, when the operation switch is turned on when bathing in the mist heating state, the water supply electromagnetic valve 16 is turned on for a predetermined time, and a predetermined amount of clean water such as tap water is supplied into the storage unit 10b of the buffer tank 10. Then, the remaining water W remaining in the storage unit 10b is diluted by the previous operation, and this can be drained to the outside by turning on the drain pump 13, that is, the inside of the storage unit 10b can be rinsed with clean water. It becomes possible to perform this mist heating operation in a clean state.

  In the timing chart shown in FIG. 7, before the mist heating operation, a predetermined amount of water is supplied to the buffer tank 10 only once and drained to drain the remaining water W in the storage unit 10 b to the outside. The present invention is not limited to this, and for example, a timing chart shown in FIG. 8 can be used. That is, while the water supply solenoid valve 16 is ON, the drain pump 13 is turned ON to perform water supply and drainage simultaneously, and while the drain pump 13 is ON, the water supply solenoid valve 16 is turned a plurality of times (twice in the figure). ) It is designed to be turned on. Thereby, before the mist heating operation, the remaining water W can be diluted in a state of running down with the water supplied into the storage unit 10b, and the water supply electromagnetic valve 16 is turned on a plurality of times to be supplied into the storage unit 10b. A plurality of diluted (mixed) states of water and residual water W can be selected, and a better diluted state can be obtained.

  As described above, the operation of the water supply electromagnetic valve 16 and the drainage pump 13 may be operated at an appropriate timing at which the remaining water W in the storage portion 10b of the buffer tank 10 can be diluted and drained before the mist heating operation. For example, a timing chart in which ON / OFF of the water supply electromagnetic valve 16 and the drain pump 13 is repeated a plurality of times before the mist heating operation, or the circulating pump 11 is operated at a predetermined timing after water supply to supply clean water or the like to the hot water circulating means 7 An appropriate timing chart can be used, such as cleaning the inside of the means 7 by circulating the inside.

  As described above in detail, in the steam generator 1 of the above embodiment, the steam is generated in the reservoir 10b of the buffer tank 10 before the steam is generated by the first heat heat exchanger 4 before the mist heating operation. Since the tap water is supplied to dilute and drain the residual water W in the reservoir 10b, the residual water W remaining in the reservoir 10b after the previous mist heating operation can be drained. For example, the reservoir 10b Residual water W containing bacteria or the like that may be generated by storage inside can be reliably drained to the outside before the mist heating operation. As a result, the inside of the storage portion 10b of the buffer tank 10 can be purified and the hot water used for steam generation can be kept clean while being diffused from the diffusion pipe 9 onto the first heat exchanger 4, and clean in the bathroom 26. Thus, a sufficient amount of steam can be efficiently generated.

  Further, the buffer tank 10 has a flange portion 10a that collects hot water flowing down from the first heat exchanger 4, and a storage portion 10b that is connected to the flange portion 10a and in which a circulation pump 11 is disposed. Since the drainage pump 13 is arranged in the deepest part 10c of 10b, the residual water W in the storage part 10b of the buffer tank 10 can be surely pumped up and drained by the drainage pump 13, and the amount of residual water W in the storage part 16b itself. Can be reduced. In addition, since the water supply solenoid valve 16 and the drainage pump 13 or the circulation pump 11 are operated according to a predetermined procedure under the control of the control device 24, for example, a good dilution (rinsing) state of the residual water W can be obtained or the residual water can be left in a dripping state. Water W can be drained. As a result, the hot and cold water used for steam generation can be kept clean at all times, and water droplets that can easily drip in the steam as in the case of conventional steam generators are suppressed. A comfortable mist heating state can be easily obtained.

  Furthermore, the second heat exchanger 5 that has the hot water supply pipe 5a in the housing 2 and generates hot air, along with the first heat exchanger 4 for generating steam, has a substantially V shape in a side view. Since the heat exchangers 4 and 5 can be efficiently arranged in the housing 2 to reduce the size of the housing 2, the heat exchangers 4 and 5 Steam and warm air can be efficiently generated by using 5. Also, a flange portion 10a of the buffer tank 10 is disposed below the adjacent lower end portions of the first heat exchanger 4 and the second heat exchanger 5, and the two heat exchangers 4, at the end portion of the flange portion 10a, Since the storage part 10b is arrange | positioned at one side of the longitudinal direction of 5, the buffer tank 10 which can store a predetermined amount of hot water is efficiently arrange | positioned in the housing | casing 2, and the external shape of the steam generator 1 is shown. Further downsizing can be achieved.

  Further, since the pump-up type drainage pump 13 is used as the drainage means for the hot water (residual water W) in the buffer tank 10, the height dimension of the casing 2 can be made as low as possible. The size can be further reduced, and the use of the drain pump 13 eliminates the need to provide a drain port on the bottom surface of the storage portion 10b of the buffer tank 10 and can reliably prevent water leakage from the buffer tank 10. As a result, the steam generator 1 can be installed compactly and inexpensively on a bathroom ceiling with a small installation space, and can be suitably used as the steam generator 1 for a system bathroom or the like.

  By the way, in the said embodiment, although the residual water W in the storage part 10b of the buffer tank 10 was diluted with water supply and drained, it removed (drained) from the storage part 10b, but this invention is, for example, the storage part 10b. A method of sterilizing bacteria in the residual water W using a heating device (heating means) provided in the above can be used in combination. That is, for example, as shown by a two-dot chain line in FIG. 5, a heating device 32 such as a heater or a hot water supply pipe is attached to the outer surface (or the inner surface) of the deepest portion 10c of the storage portion 10b.

  And before the mist heating operation, the temperature of the residual water W is raised to, for example, 60 ° C. or more by operating the heating device 32 for a predetermined time by the control signal of the control device 24 to heat the deepest portion 10c. Due to the temperature rise of the residual water W, the bacteria in the residual water W are sterilized, and the residual water W in a state in which the bacteria are killed can be drained to the outside in a state diluted with the supplied water. If comprised in this way, the bacteria removal in the residual water W in the storage part 10b of the buffer tank 10 etc. can be performed more reliably by combined use of the rinsing action and sterilization action by water supply.

  Moreover, in the said embodiment, although the drainage pump 13 was used as a hot water draining means in the buffer tank 10, this invention is not limited to this, For example, a drainage electromagnetic valve can also be used as a draining means. When this drainage electromagnetic valve is used, as shown by a two-dot chain line in FIG. 1, a drainage port is provided at the deepest portion 10c of the storage portion 10b, and a drainage pipe 14 having a drainage electromagnetic valve 33 provided at the drainage port is provided. Connecting. Then, by operating this drain electromagnetic valve 33 before the mist heating operation at the same timing as the drain pump 13 described above, the residual water W remaining in the reservoir 10b and the drain pipe 14 is diluted and the like. The hot water in the hot water circulation means 7 can be kept clean during the mist heating operation.

  In the above embodiment, the first heat exchanger 4 and the second heat exchanger 5 are constituted by heat exchangers of the same form having fins 4a and 5a and hot water supply pipes 4b and 5b as heating means. However, this invention is not limited to this, For example, you may comprise each heat exchanger 4 and 5 in a different form, and the heating means of both the heat exchangers 4 and 5 is not restricted to warm water supply pipe | tube 4b, 5b. Other appropriate heating means can be employed. Further, the arrangement form of the heat exchangers 4 and 5 in the housing 2 is not limited to a completely V-shaped arrangement, and for example, the second heat exchanger 5 is arranged in a substantially horizontal state so as to cross the ventilation path 20. For example, an appropriate arrangement form can be adopted.

  Furthermore, in the said embodiment, although the steam generator 1 was installed in the ceiling panel 28 of the bathroom 26, it can also be installed in ceiling parts, such as the upper end part of the wall panel 29 and the corner part of the ceiling panel 28, for example. Furthermore, the shape of the entire buffer tank 10 or the collar portion 10a or the storage portion 10b itself in the above embodiment is also an example. For example, a rectangular buffer tank 10 is used in a plan view, or a lower portion of the buffer tank 10 is used. The buffer tank 10 having an appropriate shape can be used according to the space shape in the housing 2 or the like, such as adopting a configuration in which a waterproof pan is attached to cover the outside.

  The present invention can be applied not only to a bathroom such as a system bathroom but also to a steam generator such as a sauna room or a shower room.

1 is a basic configuration diagram showing an embodiment of a steam generator according to the present invention. The schematic perspective view which shows the installation state to the bathroom Schematic plan view showing the specific structure of the steam generator AA line arrow view of FIG. Cross section of the buffer tank The plan view Timing chart showing an example of the same operation Timing chart showing another example of the same operation

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Steam generator, 2 ... Housing, 3 ... Grill plate, 3a ... Intake port, 3b ... Outlet, 4 ... 1st heat exchanger, 4a ... -Fins, 4b ... hot water supply pipe, 5 ... second heat exchanger, 5a ... fins, 5b ... hot water supply pipe, 6 ... blower fan, 7 ... hot water circulation means 9 ... diffusion pipe, 10 ... buffer tank, 10a ... collar, 10b ... reservoir, 10c ... deepest part, 10d ... lid, 11 ... circulation pump, DESCRIPTION OF SYMBOLS 13 ... Drain pump, 13a ... Suction inlet, 14 ... Drain piping, 15 ... Water supply piping, 15a ... Water supply port, 16 ... Water supply solenoid valve, 24 ... Control apparatus, 32 ... heating device, 33 ... drainage solenoid valve, W ... residual water.

Claims (4)

A heat exchanger capable of generating steam by diffusing hot water from the diffusion means, hot water circulating means for collecting the hot water diffused in the heat exchanger into the tank and supplying the hot water to the diffusion means, and in the tank A steam generator comprising a drainage means for draining hot water.
Before the steam is generated by the heat exchanger, water is supplied into the tank of the hot water circulation means and the drainage means is operated to drain the remaining water in the tank.   2. The drainage means is operated simultaneously with the supply of water into the tank or after a predetermined time, and the water is supplied again into the tank after drainage is completed to supply hot water to the diffusion means. The steam generator described in 1.   The tank includes a flange portion that collects hot water flowing down from the heat exchanger, and a storage portion in which a circulation pump that is connected to the flange portion and supplies hot water to the diffusion means is disposed. The steam generator according to claim 1 or 2, wherein the drainage means is arranged at the deepest part on the bottom side.   The residual water is heated by heating means arranged on the bottom surface of the tank before steam is generated by the heat exchanger and before water is supplied to the tank. Steam generator.

Images