JP2010025537A - Bath tub, and heating system using remaining heat of remaining hot water in bath - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating system using remaining heat of remaining hot water in a bath, and a bath tub, capable of recovering and utilizing efficiently the remaining heat at low cost, by simple structure. <P>SOLUTION: The bath tub 2 of the bath is formed into double structure comprising an inner tub 3 and an outer tub 4. An insulating layer 6 is provided in the outer tub 4, and a hollow part 5 formed between the inner tub 3 and the outer tub 4 is communicated with a ventilation space provided in a floor or the like in a house, via an air intake port 7 and an air take out port 8. Air in the hollow part 5 is made to flow through a space formed with respect to the ventilation space via a fan 10, while elevating a temperature of the air by the remaining heat of the remaining hot water 7 in the bath tub 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heating system that uses residual heat of remaining hot water in a bath for heating in a house and a bathtub for realizing the system.

  The remaining hot water after bathing in a general household has heat energy of 30 to 40 ° C. Various heating systems have been proposed in which the remaining heat is recovered without being thrown away as it is and used for heating in the house. Among such heating systems, those having a relatively simple configuration are typically those disclosed in Patent Documents 1 and 2.

  The outline of the heating system disclosed in Patent Document 1 is that the remaining hot water of the bath pumped out by the pump is directly supplied to the floor heating or other heat radiation type hot water heater while being reheated as necessary, and is circulated. It is.

The outline of the heating system disclosed in Patent Document 2 is a heat exchanger between a line for circulating the remaining hot water in a bath and a line for supplying warm water for heating to a floor heating or other radiant hot water heater. The residual heat of the remaining hot water is to be recovered to the heating device side through the heat exchanger.
Japanese Patent Laid-Open No. 10-227465 JP-A-8-35675

  Any of the above-described conventional heating systems that use the remaining heat of the remaining hot water circulates the remaining hot water in the bathtub in a predetermined pipe and tries to recover the remaining heat at any part of the pipe. Therefore, construction of piping, pumps and other circulation equipment requires a lot of labor and costs. In addition, a control method for suitably circulating the remaining hot water and reheated hot water becomes complicated. Considering that the total amount of residual heat that can be recovered from the remaining hot water is not very large, the heating system equipment cost significantly exceeds the energy cost saved by the recovery. In terms of sex, it is not very preferable.

  The present invention has been conceived in view of the above problems, and a heating system that can efficiently recover and use residual heat at a low cost with a simpler and simpler structure, and the system is suitably implemented. An object is to provide a bathtub for doing so.

  The basic concept of the present invention adopted to achieve the above object is that the bathtub has a double structure, the air taken into the hollow portion is directly warmed by the residual heat of the remaining hot water, and the air is taken out into the house. It is intended to heat the house by supplying. According to the heating system of the present invention that supplies air instead of hot water, construction of piping facilities and the like can be greatly simplified as compared with a conventional heating system that circulates hot water. Since the structure in which the air taken into the hollow part of the bathtub is heated by contacting the inner tank of the bathtub is adopted, the efficiency of the residual heat recovery is also excellent. Since the hollow part provided in the double-structure bathtub can be formed watertight in the bathroom, moisture in the bathroom is not mixed into the air heated by the remaining heat of the remaining hot water. Therefore, when supplying warm air to the house, the control is very easy.

  As a bathtub for realizing such a heating system, it has a double structure in which a hollow portion is provided between an inner tub and an outer tub, a heat insulating layer is provided in the outer tub, and air in the hollow portion is It is assumed that the air is communicated with the outside through at least one air intake and at least one air intake. By providing the heat insulating layer on the outside of the hollow portion, it is possible to easily recover the remaining heat of the remaining hot water in the air in the hollow portion and to prevent a decrease in the hot water temperature during the hot water. The hollow portion is preferably provided so that the contact area with the outer surface of the inner tank is increased as much as possible so as to facilitate heat dissipation from the inner tank side.

  In this bathtub, the positional relationship between the air inlet and the air outlet can be selected as an up-down arrangement or an arrangement that is a diagonal position in plan view. In the case of the vertical arrangement, the piping can be easily handled and the use efficiency of the space around the bathroom is improved. On the other hand, in the case of the diagonal arrangement, the circulation distance of the air taken into the hollow portion can be increased, so that improvement in heat recovery efficiency can be expected.

  Alternatively, a partition that blocks the circulation of air in the circumferential direction is provided at one place in the circumferential direction in the hollow portion of the bathtub, and the air intake and the air intake are disposed close to each other with the partition interposed therebetween. Good.

  Furthermore, in this bathtub, in order to control the flow of air taken into the hollow portion, a fan or other air supply means, a damper or other opening / closing means is connected to at least one of the air intake and the air intake. Is desirable. As the air supply means, various relatively small fans installed in a general air conditioning / ventilation duct or the like can be used. Ducts connected to various fans may be connected. As for the opening / closing means, various manual and electric dampers installed in general air conditioning / ventilation ducts can be used. Of course, the fan and the damper may be integrally formed.

  And the heating system using the remaining heat of the remaining hot water of the bath of the present invention installs the bathtub in the bathroom, communicates the air inlet and the air outlet of the bathtub with the ventilation space in the house, and the inside of the hollow portion of the bathtub The air is circulated between the ventilation space while the temperature is raised by the remaining heat of the remaining hot water in the bathtub.

  Or as another structure of the heating system using the remaining heat of the remaining hot water of the bath of the present invention, the bathtub is installed in the bathroom, the air intake of the bathtub is outside the house, and the air outlet is the ventilation space in the house And the outside air taken into the hollow portion of the bathtub from the air intake port is supplied to the ventilation space while being heated by the remaining heat of the remaining hot water in the bathtub.

  In these inventions, the term “ventilated space in a house” refers to a room, hall, hallway, washroom, etc. in a general house, as well as a house that adopts an external heat insulation structure or a basic heat insulation structure. Inside, the space behind the ceiling, etc. is included for air circulation and ventilation. The detailed structure of the ventilation space provided under the floor, in the wall, behind the ceiling, etc. is not particularly limited, but generally it is easy to cool down, and because of the close positional relationship with the bathroom, the floor and its surroundings are the main heating targets It is preferable in practical use to provide a ventilation space.

  As an additional configuration in the heating system, the fan or other air supply means may be stopped when bathing is used, and the air supply means may be operated to circulate air after bathing. Alternatively, the damper or other opening / closing means may be closed when using the bath, and the opening / closing means may be opened after the bath is used to circulate air. It is more preferable if the air supply means such as a fan and the opening / closing means such as a damper can be linked by simple control. By such control, it is possible to prevent the air in and out of the hollow portion from entering and exiting the bath until bathing is completed, and to prevent the temperature of the hot water in the bathtub from being lowered. Therefore, energy saving and usability are further improved.

  The heating system using the remaining heat of the remaining hot water of the bath of the present invention configured as described above warms the air taken into the hollow part of the bathtub having a double structure directly by the remaining heat of the remaining hot water, and the air is housed. Since it is intended to be used for heating by supplying it to the indoor ventilation space, the structure is simple and the construction of the facilities is simplified, and the remaining heat of the remaining hot water can be efficiently used at low cost.

  Moreover, according to the bathtub of this invention, the said heating system can be implemented suitably.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing a basic concept of a bathtub and a heating system according to the present invention.

  The bathtub 2 installed in the bathroom 1 has a double structure consisting of an inner tub 3 and an outer tub 4. A hollow portion 5 is formed between the inner tank 3 and the outer tank 4. The hollow portion 5 constitutes an air layer that is watertight with respect to the hot water in the bathtub 2 and airtight with respect to the air (humidity) in the bathroom 1.

  In this bathtub 2, the heat insulating layer 6 for preventing a decrease in hot water temperature is formed by, for example, laminating a heat insulating material on the outer surface or the entire inner surface of the outer tub 4 so as to cover the outer tub 4, or The tank 4 itself is formed integrally with the outer tank 4 by forming it with a heat insulating material. Therefore, the air in the hollow portion 5 comes into non-adiabatic contact with the inner tub 3, and the remaining heat of the remaining hot water 7 is transmitted to the air in the hollow portion 5 through the inner tub 3. Although illustration is omitted, in order to increase the heat transfer efficiency, the outer surface of the inner tub 3 may be devised to increase the contact area with air, such as a large number of radiating fins and hook-shaped protrusions.

  The hollow portion 5 communicates with the underfloor ventilation layer S1, the in-wall space S2, and other ventilation spaces provided in the house. In the illustrated embodiment, the pipe lines communicating with the ventilation space are respectively connected to two locations at approximately diagonal positions of the hollow portion 5, one of which is an air intake 8 and the other is an air intake 9. Yes. The structure of the ventilation duct is not particularly limited as long as air can be smoothly circulated. And the fan 10 as an air supply means for forcedly distribute | circulating air is installed in the suitable place of those ventilation pipe lines, and the air intake 9 in the example form. The fan 10 is operated / stopped by operating an operation switch (not shown) provided at an appropriate place in the house.

  In the illustrated embodiment, the air intake 8 is provided with a damper 11 as an opening / closing means for adjusting the flow rate of air. The damper 11 automatically opens and closes in conjunction with the operation of the fan 10.

  This heating system is used as follows. That is, during bathing, the fan 10 is stopped and the damper 11 is closed to keep the warmed air in the hollow portion 5. Thereby, it is possible to minimize cooling of the remaining hot water 7 in the bathtub 2. When bathing is completed, the fan 10 is operated, the damper 11 is also opened, and the warmed air in the hollow portion 5 is slowly sent out from the air outlet 9 toward the underfloor ventilation layer S1 and the wall space S2. The warm air sent out is further supplied to the living room S3 and the like via an appropriately provided ventilation section. Instead, the cold air in the house is taken into the hollow part 5 of the bathtub 2 from the air intake 8 and is sent out to the ventilation spaces in the house again while being heated in contact with the inner tub 3.

  Reference numeral 12 denotes a drain pipe provided so as to penetrate the inner tank 3 and the outer tank 4. When the remaining hot water 7 is cooled after a certain heating operation time, the remaining hot water 7 in the bathtub 2 is discharged through the drain pipe 12. Moreover, the code | symbol 13 is a lid | cover of the bathtub 2 used as needed.

  In this way, the remaining heat of the remaining hot water 7 that is low in terms of energy is recovered in the air at a lower level of energy, thereby realizing efficient and rational heat exchange, which is required for heating in the house. Energy cost can be reduced. Moreover, this heating system does not require equipment for circulating water (hot water) such as a pump or a switching valve, and does not require complicated control or reheating means according to the hot water temperature of the remaining hot water 7. Therefore, both the initial cost for installation and the daily operation cost can be kept low.

  FIG. 2 is a schematic diagram showing another configuration example of the heating system according to the present invention. In the illustrated embodiment, the configurations of the bathroom 1 and the bathtub 2 are substantially the same as the configuration shown in FIG. 1, but the configuration of the entire ventilation path in the house is different. That is, the air intake port 8 connected to the hollow portion 5 of the bathtub 2 communicates with the outside of the house, and takes outside air directly into the hollow portion 5 of the bathtub and warms it. Further, the air outlet 9 communicates directly with the living room S3 without passing through the underfloor ventilation layer S1 or the wall space S2. And the warm air supplied to living room S3 is discharged | emitted from the ventilation port 14 etc. which were provided suitably outside the house.

  As shown in these two examples, the overall configuration of the ventilation path can be appropriately designed according to the scale of the house, the floor plan, and the like. Moreover, you may comprise so that a ventilation path | route can be switched to the circulation system shown, for example in FIG. 1 and the external air introduction system shown in FIG. 2 according to a season.

  Drawing 3 is a key map showing the structure of the bathtub concerning other embodiments. In the illustrated bathtub 20, the inner tub 30 and the outer tub 40 are integrated at the bottom and the top, and the hollow portion 50 is formed so as to surround the inner tub 30 over substantially the entire circumference in the lateral direction. And the vertical partition 51 is formed in the hollow part 50 in one place of the short side of the bathtub 20, The movement in the circumferential direction of the air in the hollow part 50 is controlled by this partition 51. Yes.

  In the form shown in FIG. 2 (a), each of the short pipes 20 is short so that the two pipes constituting the air intake port 8 and the air intake port 9 are close to each other with the partition 51 interposed therebetween. Connected to the side.

  Further, in the embodiment shown in FIG. 2B, one of the pipes divided into a substantially semicircular cross section is obtained by dividing the inside of one pipe line in the vertical direction over the entire length of the pipe line. The air intake 8 and the other are the air intake 9, and each of the divided pipes is connected to the short side of the bathtub 20 so as to sandwich the partition 51.

  Regardless of the form of (a) and (b) above, air is fed into the hollow portion 50 from the air intake 8 and travels around the hollow portion 50 in the lateral direction along the peripheral wall of the bathtub 20. The air is taken out from the air outlet 9 again. Thus, by providing a normal air passage in the hollow portion 50 and causing the air in the hollow portion 50 to make a round in the lateral direction along the outer surface of the inner tank 30, the remaining heat of the remaining hot water can be efficiently recovered. . Moreover, according to this structure, since the air intake port 8 and the air intake port 9 can be made to adjoin, piping management becomes easy and the utilization efficiency of the piping space formed around a bathroom improves. In forming the air normal path in the hollow portion 50, not only the exemplary form but also various forms, for example, a form in which the path length is further extended by, for example, spiraling around the inner tub 30 are adopted. Is possible.

It is a schematic diagram which shows the basic concept of the bathtub and heating system which concern on embodiment of this invention. It is a schematic diagram which shows the basic concept of the heating system which concerns on other embodiment of this invention. It is the schematic perspective view which showed other embodiment of the bathtub.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bathroom 2 Bathtub 3 Inner tank 4 Outer tank 5 Hollow part 7 Remaining hot water 8 Air intake 9 Air intake 10 Fan (air supply means)
11 Damper (opening / closing means)
20 Bathtub 30 Inner tank 40 Outer tank 50 Hollow part 51 Partition

Claims (10)

  It has a double structure in which a hollow part is provided between the inner tank and the outer tank, a heat insulating layer is provided in the outer tank, and air in the hollow part has at least one air intake and at least one place. A bathtub that communicates with the outside via an air outlet.   The bathtub according to claim 1, wherein the air inlet and the air outlet are arranged vertically.   The bathtub of Claim 1 arrange | positioned so that an air intake port and an air intake port may become a diagonal position planarly.   The bathtub according to claim 1, wherein a partition that blocks the circulation of air in the circumferential direction is provided at one place in the circumferential direction in the hollow portion, and the air intake and the air intake are disposed close to each other with the partition interposed therebetween. Bathtub characterized by being.   The bathtub according to any one of claims 1 to 4, wherein a fan or other air supply means is connected to at least one of the air inlet or the air outlet.   The bathtub according to any one of claims 1 to 5, wherein a damper or other opening / closing means is connected to at least one of the air inlet or the air outlet.   The bathtub according to any one of claims 1 to 6 is installed in a bathroom, and the air inlet and the air outlet of the bathtub are communicated with a ventilation space in the house, and the air in the hollow portion of the bathtub is contained in the bathtub. A heating system using the remaining heat of the remaining hot water of the bath, wherein the temperature is raised by the remaining heat of the remaining hot water and is circulated between the ventilation spaces.   The bathtub according to any one of claims 1 to 6 is installed in a bathroom, and the air intake port of the bathtub communicates with the outside of the house and the air intake port communicates with the ventilation space in the house. A heating system using the remaining heat of the remaining hot water of the bath, wherein the outside air taken into the hollow portion of the bath is supplied to the ventilation space while being heated by the remaining heat of the remaining hot water in the bathtub.   9. A heating system using the remaining heat of the remaining hot water of a bath according to claim 7 or 8, wherein when using the bath, the fan or other air supply means is stopped, and after using the bath, the air supply means is operated to circulate the air. A heating system that uses the residual heat of the remaining hot water in the bath.   The heating system using the remaining heat of the remaining hot water of the bath according to claim 9, wherein the damper and other opening / closing means are closed when bathing is used, and the air is circulated by opening the opening / closing means after bathing. A heating system that uses residual heat from the remaining hot water in the bath.

Images