JP4863222B2 - Bathroom heater with sauna function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the use of water by efficiently evaporating hot water and to prevent increase of ventilation resistance of a heat exchanger in a bathroom heater with a sauna function provided with a circulation fan 6 in a ventilation flue 5 in a heater main body 1 for sucking the air in a bathroom from a suction port 3 and supplying the air to the bathroom from a supply port 4, and a fin tube-type heat exchanger 7 at an upstream side with respect to the circulation fan, and comprising a vapor generating means 8 for generating water vapor by applying hot water to the heat exchanger. <P>SOLUTION: An upper portion 73 of the heat exchanger 7 is disposed in a state of offset to a circulation fan 6 side, and a drain pan 9 is disposed over between a lower end of the upper portion 73 and an upper end of a part 72 of the heat exchanger lower than the lower end. A collision plate 84 for making the hot water jetted from a spout nozzle 83 collide therewith is disposed at an upper part of the drain pan 9, and fine water drops scattered from the collision plate 84 are applied to the upper portion 73 of the heat exchanger 7. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a bathroom heater with a sauna function that can make a bathroom in a hot and humid sauna state.

  A bathroom heater generally has a heater body having a suction port and an outlet port communicating with the bathroom, and defines a ventilation path connecting the suction port and the outlet port in the heater body. In addition, a circulation fan is provided in the ventilation path to draw air in the bathroom from the suction inlet and blown out from the outlet to the bathroom, and a fin-tube heating heat exchanger is provided in the ventilation path upstream of the circulation fan. ing. Then, the heating medium heated by the heat source device is circulated to the heating heat exchanger, the air sucked from the suction port is heated by the heating heat exchanger, and the hot air is blown into the bathroom from the blowout port. I am doing so.

  Further, as such a bathroom heater, a steam generating means for generating water vapor using a heating heat exchanger as a heat source is provided, and the bathroom is heated and humidified by mixing the steam generated by the steam generating means into the air flowing through the air passage. The thing with the sauna function which makes the sauna state of this is also known (for example, refer patent document 1). In this apparatus, the steam generating means dissipates warm water from a plurality of water discharge nozzles over the entire upper portion of the heating heat exchanger, and evaporates the hot water while flowing downward from above along the fins of the heating heat exchanger. It is configured.

  However, in this case, since warm water flows down along all the fins of the heat exchanger for heating, a gap that allows ventilation between the fins is narrowed by the hot water, and the ventilation resistance of the heat exchanger for heating increases. As a result, in order to ensure the required air volume, it is necessary to significantly increase the rotational speed of the circulation fan, resulting in increased noise.

  Moreover, in order to make the bathroom an atmosphere of 40 ° C. and a relative humidity of 80% or more suitable for a sauna bath, it is necessary to evaporate about 0.1 L of warm water per minute. It is necessary to dissipate as much as 6 liters of hot water, which is very inefficient.

In view of this, Japanese Patent Application Laid-Open No. H10-228561 is also known which has a hot water circulation means for recovering the hot water that has flowed down without being evaporated by the heating heat exchanger and returning it to the water discharge nozzle. According to this, water consumption can be reduced. However, there is a problem that a pump is required as the hot water circulation means, which increases the cost. In addition, an increase in ventilation resistance of the heat exchanger for heating is unavoidable, and the problem of noise due to an increase in the rotational speed of the circulation fan cannot be solved.
Japanese Patent No. 2773014 JP 2003-235931 A

  In view of the above, the present invention is a bathroom with a sauna function that can efficiently evaporate hot water and reduce the amount of water used, and can also prevent an increase in ventilation resistance of a heat exchanger for heating. The challenge is to provide a heater.

  In order to solve the above-mentioned problems, the present invention defines a ventilation path connecting the suction inlet and the outlet in the heater body in which the inlet and the outlet connected to the bathroom are opened, Provided with a circulation fan that sucks air in the bathroom from the inlet and blows it out of the outlet to the bathroom, and is a finned tube type heater that heats the air sucked from the inlet in the part of the ventilation path upstream of the circulation fan A bathroom heater provided with a heat exchanger for heating, provided with steam generating means for generating water vapor using the heating heat exchanger as a heat source, and mixing the steam generated by the steam generating means with the air flowing through the air passage In the thing with a sauna function which makes the bathroom a hot and humid sauna state, the steam generating means collides the water discharge nozzle that spouts hot water and the hot water spouted from the water discharge nozzle into fine water droplets. The provided, impact plate is characterized in that the fine water droplets scattered from the impact plate is arranged to span only a portion of the heating heat exchanger.

  According to the present invention, the water ejected from the water discharge nozzle is not directly applied to the heating heat exchanger, but is crushed into fine water droplets by the collision plate and applied to the heating heat exchanger. Evaporates efficiently. As a result, the amount of water used can be reduced. Moreover, since warm water evaporates efficiently, sufficient water vapor | steam can be generated only by a part of heat exchanger for heating. And hot water does not flow down to the other part of the heat exchanger for heating, and the increase in ventilation resistance of the whole heat exchanger for heating is suppressed. As a result, a required air volume can be obtained without increasing the rotational speed of the circulation fan, and fan noise can be reduced.

  Note that even if the evaporation efficiency of the hot water is improved, not all the hot water applied to the heating heat exchanger evaporates. Therefore, it is necessary to provide a drain pan that receives the warm water flowing down without evaporating. Here, if the main body of the heater is embedded in the back of the ceiling of the bathroom, if the fine water droplets scattered from the collision plate are applied to the lower part of the heat exchanger for heating, the arrangement position of the drain pan must be lowered, It becomes difficult to place the drainage pipe connected to the drain pan with a gradient on the back of the ceiling. As a result, it is necessary to forcibly drain the water in the drain pan with a drain pump. Therefore, when the main body of the heater is embedded in the ceiling of the bathroom, the fine water droplets scattered from the collision plate are applied to the upper part of the heating heat exchanger, and the water that has flowed down without evaporating at the upper part of the heating heat exchanger. It is desirable to arrange the drain pan receiving between the upper part of the heat exchanger for heating and the part of the heat exchanger for heating below it. According to this, the arrangement position of the drain pan becomes high, and it becomes easy to arrange the drain pipe connected to the drain pan with a gradient on the back of the ceiling. As a result, the water in the drain pan can be drained naturally without using a drain pump, which is advantageous for cost reduction.

  Further, in this case, the upper part of the heating heat exchanger is arranged offset to the circulation fan side with respect to the part of the heating heat exchanger below this, and the lower end of this upper part and the heating heat exchanger below this part are arranged. It is desirable that the drain pan is disposed so as to straddle between the upper end of this portion and the collision plate be disposed above the drain pan. According to this, the water dripping from the collision plate can be received by the drain pan. Here, even if the upper part of the heat exchanger for heating is arranged immediately above the part of the heat exchanger for heating below this, the drain pan is projected outward from the heat exchanger for heating, and this If a collision board is arrange | positioned above a part, the water dripping from a collision board can be received with a drain pan. However, in this, the flow of air from the suction port to the upper part of the heating heat exchanger is obstructed by the drain pan, and it becomes difficult for the air to flow to the upper part of the heating heat exchanger, and the evaporation efficiency of hot water is reduced. Ventilation resistance increases. On the other hand, if the upper portion of the heating heat exchanger is offset as described above, the space generated by this offset is utilized for the arrangement space of the drain pan and the collision plate, and the drain pan is placed outside the heating heat exchanger. It is possible to receive water dripping from the collision plate without overhanging, and the above-mentioned problems do not occur. The drain pan can also be used as a collision plate, and a separate collision plate can be omitted.

  FIG. 1 shows a bathroom heater with a sauna function according to an embodiment of the present invention. The bathroom heater includes a box-shaped heater body 1 that is embedded in the back of the ceiling through an opening formed in the ceiling R of the bathroom. The heater body 1 includes a lower cover 2 exposed on the inner surface of the ceiling R of the bathroom, and a suction port 3 and an outlet 4 are opened in the lower cover 2.

  In the heater body 1, a ventilation path 5 that connects the suction port 3 and the outlet 4 is defined. A circulation fan 6 is provided in the ventilation path 5, and a heating heat exchanger 7 is provided in a portion of the ventilation path 5 on the upstream side of the circulation fan 6. The heating heat exchanger 7 is a fin tube type heat exchanger that includes a large number of fins 7a stacked in the direction perpendicular to the paper surface of FIG. 1 and a meandering tube 7b that passes through the fins 7a. And a heat medium (water, antifreeze liquid, etc.) heated by the heating part of the heat source machine having the heating part and the heating part flows into the tube 7b. When a heating medium is supplied to the heating heat exchanger 7 and the circulation fan 6 is operated, the air in the bathroom is sucked from the suction port 3 and heated by the heating heat exchanger 7. Become blown into the bathroom.

  The heating heat exchanger 7 is arranged in a standing posture so as to extend upward from the lower first portion 71 arranged in a horizontal posture and the outer end portion opposite to the circulation fan 6 of the first portion 71. The second portion 72 and the third portion 73 disposed above the second portion 72 and offset from the second portion 72 toward the circulating fan 6 side.

  Moreover, the bathroom heater of this embodiment is provided with the steam generation means 8 which generate | occur | produces water vapor | steam by using the heat exchanger 7 for heating as a heat source by applying warm water to the heat exchanger 7 for heating. The steam generating means 8 collides with the water discharge nozzle 83 that ejects hot water supplied from the hot water supply path 81 through the electromagnetic valve 82 in a straight rod flow state, and the hot water ejected from the water discharge nozzle 83 to crush it into fine water droplets. Plate 84. Here, the collision plate 84 is disposed above the drain pan 9 provided so as to straddle between the lower end of the third portion 73 and the upper end of the second portion 72 of the heat exchanger 7 for heating. The fine water droplets scattered from 84 are applied only to the third portion 73 of the heating heat exchanger 7. Further, the hot water flowing down without evaporating in the third portion 73 of the heating heat exchanger 7 and the hot water dripping from the collision plate 84 are received by the drain pan 9. Then, the water in the drain pan 9 is drained outdoors via a drain hose 91 connected to the drain pan 9.

  The hot water supply path 81 may be supplied with hot water from the hot water supply unit of the heat source unit, or supplied with hot water heated by a liquid heat exchanger that supplies a heat medium from the heating unit of the heat source unit. Also good. Further, a plurality of water discharge nozzles 83 are arranged side by side at intervals in the width direction of the heating heat exchanger 7 (in the direction perpendicular to the plane of FIG. 1). A fine water droplet is applied over the entire area.

  Next, the operation of this embodiment will be described. When the sauna switch provided in the remote controller (not shown) is turned on, the heating medium is supplied to the heating heat exchanger 7 from the heating section of the heat source unit, the circulation fan 6 is driven, and the electromagnetic valve 82 is opened. Then, hot water is ejected from the water discharge nozzle 83. The ejected hot water collides with the collision plate 84 and is crushed into fine water droplets. And the fine water droplets of the hot water splashing from the collision plate 84 are applied to the third portion 73 of the heating heat exchanger 7 and evaporate, and the water vapor is mixed into the air flowing through the ventilation path 5 to make the bathroom in a hot and humid sauna state. Become.

  Here, if the hot water ejected from the water discharge nozzle 83 is directly applied to the heating heat exchanger 7, the ratio of the hot water evaporated in the heating heat exchanger 7 becomes very small. On the other hand, in this embodiment, since the warm water is crushed into fine water droplets and applied to the heating heat exchanger 7, the warm water evaporates efficiently. As a result, the amount of water used can be reduced. Furthermore, by improving the evaporation efficiency, a sufficient amount of water vapor can be generated only by the third portion 73 of the heating heat exchanger 7. And since warm water does not flow down into the 2nd part 72 and the 1st part 71 of the heat exchanger 7 for heating, the clearance gap between the fins 7a of these parts 71 and 72 is not narrowed by the warm water which flows down. Accordingly, an increase in ventilation resistance of the entire heat exchanger 7 for heating is suppressed, and a required air volume can be obtained without increasing the rotational speed of the circulation fan 6, thereby reducing fan noise.

  By the way, it is also possible to arrange the collision plate 84 so that fine water droplets scattered from the collision plate 84 are applied to the second portion 72 below the heating heat exchanger 7. However, in this case, it is necessary to dispose the drain pan 9 below the second portion 72, the disposition position of the drain pan 9 becomes too low, and the drain hose 91 connected to the drain pan 9 is disposed with a gradient on the back of the ceiling. It becomes difficult to do. Therefore, it is necessary to forcibly drain the water in the drain pan 9 with a drain pump. On the other hand, in this embodiment, the drain pan 9 is arranged with the third portion 73 by disposing the collision plate 84 so that the fine water droplets scattered from the collision plate 84 are applied to the upper third portion 73 of the heating heat exchanger 7. It becomes possible to arrange at a relatively high position between the second portion 72. Accordingly, the drain pipe 91 connected to the drain pan 9 is disposed with a gradient on the back of the ceiling, so that the water in the drain pan 9 can be drained naturally. This eliminates the need for a drain pump and is advantageous in reducing costs.

  It is also possible to arrange the third portion 73 of the heating heat exchanger 7 immediately above the second portion 72. However, in this case, in order to allow the drain pan 9 to receive the water dripping from the collision plate 84, the drain pan 9 is projected outside the heating heat exchanger 7 (left side in FIG. 1), It is necessary to dispose the collision plate 84 on the overhanging portion. As a result, the flow of air from the suction port 3 toward the third portion 73 of the heating heat exchanger 7 is obstructed by the overhanging portion of the drain pan 9, making it difficult for the air to flow into the third portion 73, and evaporating efficiency of hot water As the air flow decreases, the airflow resistance increases. On the other hand, if the third portion 73 of the heating heat exchanger 7 is arranged offset to the circulating fan 6 side with respect to the second portion 72 as in the present embodiment, the space generated by this offset is made to be the drain pan 9 and the collision plate. The drain pan 9 can be used for the arrangement space 84 to receive the water dripping from the collision plate 84 without protruding the drain pan 9 to the outside of the heating heat exchanger 7. Accordingly, air smoothly flows from the suction port 3 to the third portion 73 of the heating heat exchanger 7 without being interrupted by the drain pan 9, and the above-described problems do not occur.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, in the above-described embodiment, the collision plate 84 is disposed above the drain pan 9, but the hot water ejected from the water discharge nozzle 83 is collided with the bottom plate portion of the drain pan 9, and the drain pan 9 is also used as the collision plate, and a separate collision is performed. It is also possible to omit the plate 84.

  Moreover, although the said embodiment applies this invention to the bathroom heater which installs the heater main body 1 behind the ceiling of a bathroom, the wall-mounted bathroom heater which installs a heater main body in the side wall of a bathroom is also applied. The present invention can be applied. In addition, in a wall-mounted bathroom heater, since the drain pan can be naturally drained even when the position of the drain pan is lowered, so that fine water droplets of hot water splashing from the impingement plate are applied to the lower part of the heating heat exchanger. You may arrange.

Sectional drawing which shows the bathroom heater of embodiment of this invention.

Explanation of symbols

  R: Bathroom ceiling, 1 ... Heater body, 3 ... Suction port, 4 ... Air outlet, 5 ... Ventilation path, 6 ... Circulating fan, 7 ... Heat exchanger for heating, 72 ... Second part (heat exchange for heating) The lower part from the upper part of the vessel), 73 ... the third part (upper part of the heat exchanger for heating), 8 ... the steam generating means, 83 ... the water discharge nozzle, 84 ... the impingement plate, 9 ... the drain pan.

Claims (3)

An air passage connecting the air inlet and the air outlet is defined in the main body of the heater that has an air inlet and an air outlet that communicate with the bathroom. In addition to providing a circulation fan that blows out from the bathroom to the bathroom, the bathroom heater has a fin-tube type heat exchanger for heating the air sucked from the suction port in the ventilation path upstream of the circulation fan. With a steam generating means that generates steam using a heat exchanger for heating as a heat source, and with a sauna function that makes the bathroom a hot and humid sauna state by mixing the steam generated by the steam generating means into the air flowing through the air passage In
The steam generating means includes a water discharge nozzle that ejects hot water and a collision plate that collides the hot water ejected from the water discharge nozzle and breaks it into fine water droplets, and the collision plate is heated by the fine water droplets scattered from the collision plate. A bathroom heater with a sauna function, which is arranged so as to cover only a part of the exchanger. The bathroom heater with a sauna function according to claim 1, wherein the heater body is embedded in the ceiling of a bathroom.
A fine water droplet splashing from the collision plate is applied to the upper part of the heating heat exchanger, and a drain pan that receives the water that has flowed down without being evaporated at the upper part of the heating heat exchanger has an upper part of the heating heat exchanger. A bathroom heater with a sauna function, which is disposed between a portion of a lower heat exchanger for heating.   The upper part of the heating heat exchanger is arranged offset to the circulating fan side with respect to the part of the heating heat exchanger below it, and the lower end of this upper part and the part of the heating heat exchanger below this part The drain pan is disposed so as to straddle between the upper end of the drain pan, the collision plate is disposed above the drain pan, or the drain pan is also used as the collision plate. Bathroom heater.

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