JP7195749B2 - bath system - Google Patents

Description

The present invention relates to a bath cooling system forcibly lowering the temperature of bath water in a bath.

Conventionally, when the temperature of the bathtub water in the bathtub is forcibly lowered, water is added. For example, in Patent Document 1 below, when hot water is intermittently filled into a bathtub, post-boiled high-temperature hot water is dropped every time hot water is intermittently filled, and hot water higher than the set temperature of the bath is filled. Therefore, a technique is disclosed in which an extra water pouring operation is performed at the end to adjust the temperature of the hot water in the bathtub.

JP-A-10-038368

There are various requests other than the above to lower the temperature of the bath water in the bath. For example, if the bath water is reheated the next day and used, germs tend to grow until the bath water cools down. Although it is possible to prevent the propagation of germs by adding chemicals, chemicals are not preferable because they irritate the skin. Bacteria tend to grow at temperatures around 40°C, so in order to suppress the growth of bacteria, the water in the bath should be quickly cooled.

Also, in recent years, high insulation in bathtubs has progressed, making it difficult for the water to cool down. However, it may be expensive and uncomfortable for the following people: For example, in winter, the body feels cold and the bath feels hot, so it is preferred to take a bath that is slightly lukewarm at first, and then reheat it to raise the temperature of the water to warm it up. If the next person has the same taste, it is desirable that the temperature of the hot water raised by the reheating of the previous person is forcibly lowered before the next person enters.

However, the method of lowering the hot water temperature by pouring water not only wastes water, but also causes the water level in the bathtub to rise each time. Reheating after the water level rises requires a lot of energy due to the rise in water temperature.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bath cooling system capable of forcibly lowering the temperature of hot water in a bathtub without pouring water.

The gist of the present invention for achieving this object lies in the following inventions.

[1] a heat exchanger installed in an air supply duct that penetrates a wall and connects the outdoors and the indoors;
a circulating device for circulating the heat medium fluid heated by exchanging heat with the bathtub water or the bathtub water in the bathtub through the heat exchanger;
a control unit for controlling execution of a bath cooling operation for operating the circulation device to lower the temperature of the bath water in the bath below the current temperature;
a reservation unit that receives bathing reservations from users;
a set temperature registration unit that receives and registers bath set temperature for each bather;
with
The control unit operates the circulation device when a predetermined bath cooling condition, which is a criterion for determining whether the temperature of the water in the bathtub should be lowered below the current temperature, is established , and
The condition for bathing includes that, when one user finishes bathing, the bath setting temperature of the next person who makes a reservation for bathing is lower than the current bath water temperature by a predetermined temperature or more.
A bathing system characterized by:

In the above invention, when the bath heating condition is satisfied, the heat exchanger installed in the air supply duct that penetrates the wall and connects the outdoors and the indoors exchanges heat with the bathtub water in the bathtub or the bathtub water. The temperature of the bath water is lowered by circulating the heat medium fluid whose temperature has been raised by heating. When one user finishes bathing, the control unit checks the bath set temperature of the next person who made a reservation for bathing, and if the bath set temperature of the next person who made a reservation is lower than the current bathtub water temperature by a predetermined temperature or more, the bath is It judges that the cooling condition is satisfied and executes the bath cooling operation.
[2] a heat exchanger installed in a supply air duct that penetrates the wall and connects the outdoors and the indoors;
a circulating device for circulating the heat medium fluid heated by exchanging heat with the bathtub water or the bathtub water in the bathtub through the heat exchanger;
a control unit for controlling execution of a bath cooling operation for operating the circulation device to lower the temperature of the bath water in the bath below the current temperature;
A reservation department that accepts bathing reservations,
a setting temperature registration unit that receives and registers the bath setting temperature related to the bathing reservation;
with
The control unit operates the circulation device when a predetermined bath cooling condition, which is a criterion for determining whether the temperature of the water in the bathtub should be lowered below the current temperature, is established, and
The condition for bath cooling includes that when one user finishes bathing, the bath setting temperature related to the next bathing reservation is lower than the current bathtub water temperature by a predetermined temperature or more.
A bathing system characterized by:

[ 3 ] The bath according to [1] or [2] , wherein the condition for bathing includes that automatic operation of the bath has ended and the last bather has left the bath. better system.

In the above invention, after the last bather leaves, the temperature of the bath water is forcibly lowered to prevent the propagation of germs.

[ 4 ] The conditions for bathing are winter, manual reheating is performed while a person is taking a bath, and the temperature of the bath water is a predetermined value higher than the set temperature of the bath when the person leaves the bath. The bath cooling system according to [1] or [2] , characterized in that it is higher than the temperature.

In the above invention, when reheating is performed during bathing in winter, when the bather leaves the bath, the bathtub water temperature is forcibly lowered for the next bather.

[5] In the heat exchanger, a plurality of hollow flat tubes are stacked at intervals, and adjacent flat tubes are arranged in the stacking direction by connecting portions at one end side and the other end side, respectively. any one of [1] to [4], characterized in that the fluid flowing into the inflow port flows out of the outflow port through each flat tube and the connecting part. Bath system as described.

According to the bath cooling system of the present invention, it is possible to forcibly lower the temperature of hot water in the bathtub without pouring water.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows schematic structure of the bath system which concerns on embodiment of this invention. It is a figure which shows the installation example of a 24-hour ventilation system. FIG. 4 is a diagram showing a state in which the heat exchange unit is inserted into the air supply duct; It is a perspective view showing a heat exchange unit. It is a figure which shows three types of flat tubes which comprise a heat exchanger. FIG. 4 is a diagram showing a water flow path in a single reciprocating heat exchanger; It is a figure which shows the water-flow path|route in a parallel type heat exchanger. It is a figure which shows the flow of hot water in reheating operation|movement. FIG. 10 is a diagram showing a hot water circulation path when preheating supplied air in a heat exchange unit in a living room while performing a heating operation with a hot water mat for floor heating. FIG. 4 is a diagram showing a hot water circulation path when preheating supplied air in a heat exchange unit in a living room without performing heating with a hot water mat for floor heating. FIG. 4 is a diagram showing a hot water circulation path when preheating supplied air is performed by a heat exchange unit in a living room and a heat exchange unit in a bedroom, etc., without performing heating by a hot water mat for floor heating. FIG. 4 is a diagram showing a hot water circulation path when hot water for heating is circulated to preheat supply air in a heat exchange unit such as a bedroom. FIG. 10 is a diagram showing a hot water circulation path when hot water is circulated to preheat supplied air in a heat exchange unit such as a bedroom. FIG. 10 is a flow chart showing processing related to activation control of a bath cooling function when the temperature of remaining hot water in the bath is lowered to suppress the growth of germs. FIG. FIG. 11 is a flowchart showing an example of activation processing for an operation related to the bath function; FIG. It is a figure which shows the structural example of the bathing system which can reserve bathing. FIG. 11 is a flow chart showing processing when performing control related to a bath function based on a bathing reservation; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below based on the drawings.

FIG. 1 is a diagram showing a schematic configuration of a bath system 8 according to an embodiment of the invention. The bath system 8 includes a hot water supply/heating heat source 10, a path switching unit 40, a heating radiator 3, and a heat exchange unit 60 provided in the air supply duct 103 of the 24-hour ventilation system. Here, the heat exchange unit 60 is provided in the air supply duct 103 of the living room, which is the living room on the south side, and in the air supply duct 103 of the bedroom and other rooms (north side room, etc.). The heating radiator 3 is a hot water mat for floor heating, but is not limited to this.

The bath system 8 has a hot water supply function for heating water supply to supply hot water to a shower in the bathroom and a faucet in the kitchen, etc., a hot water pouring function for pouring hot water into the bathtub 5 and reheating the bathtub water in the bathtub 5. A reheating function that raises the temperature by heating, a heating function that circulates hot water in a heating radiator 3 such as a hot water mat for floor heating to heat, and a heat exchange unit 60 that circulates hot water for heating or bath water. It is equipped with a supply air preheating function that exchanges heat with the outside air. In addition, the bathtub is automatically filled with hot water at the bath set temperature to the set water level, and after the hot water filling is completed, the set water level and bath set temperature are maintained for a predetermined time (for example, 4 hours). It is equipped with a function of automatic operation of the bath that performs reheating etc.

A hot water supply/heating heat source device 10 of the bath system 8 has a first heat exchanger 11 for hot water supply heated by a burner, and a second heat exchanger 12 for reheating and heating. Each of the first heat exchanger 11 and the second heat exchanger 12 includes sensible heat exchangers 11a and 12a and latent heat exchangers 11b and 12b for recovering the latent heat of the exhaust gas.

When a faucet provided at the tip of hot water supply pipe 14 is opened, water supplied from a water supply source is discharged through water supply pipe 13 , the water pipe of first heat exchanger 11 and hot water supply pipe 14 . The water supply pipe 13 is provided with a water volume sensor 15, a water volume servo 16 for adjusting (limiting) the water volume, and the like. The water supply pipe 13 and the hot water supply pipe 14 are connected by a bypass pipe 17 immediately downstream of the water quantity servo 16, and a bypass servo 18 for adjusting the quantity of water flowing through the bypass pipe 17 is provided in the middle of the bypass pipe 17. - 特許庁

The hot water supply pipe 14 has a heat exchanger temperature sensor 21 for detecting the temperature of the hot water immediately after leaving the first heat exchanger 41, and a hot water supply temperature sensor for detecting the temperature of the hot water after the water supply from the bypass pipe 17 joins (outflow hot water temperature). 22 are provided.

The hot water that has returned to the hot water supply heating heat source unit 10 from the return pipe 81 of the heating circuit that circulates hot water to the hot water mat 3 for floor heating is subjected to latent heat exchange of the collective header 23, the internal return pipe 24, and the second heat exchanger 12. Via the vessel 12b, the cistern 25 open to the atmosphere, and the heating circulation pump 26, part of the It flows out to the going pipe (low temperature going pipe) 82 .

The collective header 23 joins the hot water from the return pipe 81 and the hot water from the hot water return pipe 88 and sends it to the in-machine return pipe 24 . The thermal valve branch header 28 has a function of branching the hot water from the internal supply pipe 27 into the supply pipe 82 and the hot water supply pipe 87, and switches whether to send the hot water to the supply pipe 82 or not. It incorporates a thermal valve that switches whether to deliver to pipe 87 or not.

Some other hot water branched at the downstream branch point of the heating circulation pump 26 passes through the sensible heat exchanger 12a of the second heat exchanger 42, the flow control valve 29, the reheating water-water heat exchanger Through the primary side water pipe 30 and the return pipe 31 , it merges in the middle of the in-machine return pipe 24 . The amount of hot water flowing to the primary side of the reheating water-water heat exchanger 30 is adjusted by the flow control valve 29 .

A bath water switch 33 and a bath circulation pump 34 are provided in the water pipe 32 connected to the inlet side of the secondary side water pipe of the reheating water-water heat exchanger 30. A water pipe 35 is connected to the outlet side of the secondary water pipe. A hot water supply pipe 36 branched from the hot water supply pipe 14 downstream of the hot water supply temperature sensor 22 joins the water pipe 35 in the middle and is connected. A pouring valve 37 for opening and closing the pouring pipe 36 is provided in the middle of the pouring pipe 36 .

The outgoing pipe 82 of the heating circuit is connected to the inlet side of the warm water mat 3 for floor heating installed under the floor of the living room or the like, and the outlet side of the warm water mat 3 for floor heating is connected to the living room via a water pipe 83. The inlet side of the heat exchange unit 60 inserted into the air supply duct 103 is connected, and the return pipe 81 is connected to the outlet side of the heat exchange unit 60 . The return pipe 81 is connected to the collective header 23 of the hot water supply/heating heat source machine 10 . A switching valve 84 is interposed in the outgoing pipe 82 in front of the hot water mat 3 for floor heating. A switching valve 84 switches between connecting the outgoing pipe 82 to the inlet side of the hot water mat 3 for floor heating or connecting it to the water pipe 83 bypassing the hot water mat 3 for floor heating. The switching valve 84 is switched according to a control signal from a control section 93, which will be described later. Note that the switching valve 84 may be of a manually switching type.

A first connection port of the path switching unit 40 is connected to the other end of a heat radiation return pipe 86 having one end connected to the output side of a heat exchange unit 60 provided in an air supply duct 103 such as a bedroom. A second connection port of the route switching unit 40 is connected to the other end of the hot water return pipe 88 , one end of which is connected to one inlet of the collective header 23 . The third connection port of the path switching unit 40 is connected to the other end of a hot water feed pipe 87 having one end connected to one outlet of the thermal valve branch header 28 of the hot water supply/heating heat source machine 10 . The fourth connection port is connected to the other end of a heat radiating supply pipe 85 having one end connected to the entrance side of a heat exchange unit 60 provided in an air supply duct 103 such as a bedroom.

Further, the fifth connection port of the path switching unit 40 is connected to the bath return pipe 89 whose one end is connected to the inflow port of the circulation fitting of the bathtub 5, and the sixth connection port is connected to the hot water supply/heating heat source machine 10. The other end of a water pipe 32 having one end connected to the entry side of a bath circulation pump 34 is connected. The seventh connection port of the path switching unit 40 is connected to the other end of a water pipe 35 having one end connected to the outlet side of the secondary side water pipe of the reheating water-water heat exchanger 30 of the hot water supply and heating heat source equipment 10, The eighth connection port is connected to the other end of a bath pipe 90 having one end connected to the outflow port of the circulation fitting of the bathtub 5 .

The route switching unit 40 has a first pipe 41 that connects the first connection port and the second connection port inside the machine, and a first solenoid valve 42 that opens and closes the first pipe 41 is provided in the middle of the first pipe 41. There is. The first solenoid valve 42 functions as a check valve that blocks flow from the second connection port to the first connection port side when opened.

Further, the path switching unit 40 has a second pipe 43 that connects the third connection port and the fourth connection port inside the machine, and a second electromagnetic valve 44 that opens and closes the second pipe 43 is installed in the middle of the second pipe 43. It is provided. The second solenoid valve 44 functions as a check valve that blocks flow from the fourth connection port to the third connection port side when open.

A third pipe 45 branched from the first pipe 41 between the first connection port and the first solenoid valve 42 connects the secondary side of the first circulation pump 46 , the third solenoid valve 47 , and the water-water heat exchanger 48 . , and joins the second pipe 43 between the second solenoid valve 44 and the second connection port. The first circulation pump 46 feeds water from the first connection port toward the secondary side of the water-water heat exchanger 48 . The third electromagnetic valve 47 functions as a check valve that opens and closes the third pipe 45 and blocks the flow from the water-water heat exchanger 48 to the first circulation pump 46 when opened.

The path switching unit 40 has a fourth pipe 51 that connects the fifth connection port and the sixth connection port inside the machine, and a fourth electromagnetic valve 52 that opens and closes the fourth pipe 51 is provided in the middle of the fourth pipe 51. There is. The fourth solenoid valve 52 functions as a check valve that blocks flow from the sixth connection port to the fifth connection port side when opened.

Further, the route switching unit 40 has a fifth pipe 53 that connects the seventh connection port and the eighth connection port inside the machine, and a fifth solenoid valve 54 that opens and closes the fifth pipe 53 is installed in the middle of the fifth pipe 53. It is provided. The fifth solenoid valve 54 functions as a check valve that blocks flow from the eighth connection port to the seventh connection port side when opened.

A sixth pipe 55 branched from the fourth pipe 51 between the fifth connection port and the fourth solenoid valve 52 connects the primary side of the water-water heat exchanger 48, the second circulation pump 56, and the sixth solenoid valve 57. After passing through, it merges with the fifth pipe 53 between the fifth electromagnetic valve 54 and the eighth connection port. The second circulation pump 56 feeds water from the primary side of the water-water heat exchanger 48 toward the sixth solenoid valve 57 . The sixth electromagnetic valve 57 functions as a check valve that opens and closes the sixth pipe 55 and blocks flow from the eighth connection port side to the second circulation pump 56 side when opened.

The hot water supply/heating heat source machine 10 includes a control section 93 (see FIG. 16) that controls the operation of each section. The control unit 93 is composed of a circuit having a CPU, a ROM, a RAM, etc. as main parts, and controls the operation of the hot water supply/heating heat source machine 10, the path switching unit 40, and the switching valve 84 (when not manually operated).

FIG. 2 shows an installation example of a 24-hour ventilation system. A ventilation fan 101 is provided in the ceiling of the bathroom, etc., and the suction port 102 of the ventilation fan 101 is arranged in the ceiling (near the center of the house) of the toilet, washroom, bathroom, etc., and the wall of each living room facing the outside is supplied. An air port (air supply duct) 103 is provided, and exhaust air from the ventilation fan 101 is discharged outside from an air outlet 104 provided at the front door or the like through the duct. This is a system (exhaust type) in which air is exhausted by a fan and air is taken in naturally without using a fan (exhaust type), and is widely used in ordinary houses.

When such a 24-hour ventilation system is used, cold outside air enters the room from the supply air duct 103 in winter, so in this system, the outside air is slightly warmed by the supply air preheating function before being introduced into the room. That is, the heat exchange unit 60 is arranged in the air supply duct 103, and hot water for heating or bath water is circulated through the heat exchange unit 60 to slightly warm the outside air before introducing it into the room. If the bathtub water in the bathtub 5 is circulated through the heat exchange unit 60 to preheat the supplied air, the temperature of the bathtub water can be lowered to achieve a bath cooling function.

FIG. 3 shows the heat exchange unit 60 inserted into the air supply duct 103 . An air supply port cover 108 is attached to the entrance of the air supply duct 103 on the outdoor side. The air supply port cover 108 covers the front, upper and lower parts of the entrance in front of the entrance on the outdoor side of the air supply duct 103, and forms a ventilation passage penetrating left and right from the ground along the outer wall of the building. to prevent the wind blowing up from below from entering directly into the air supply duct 103.

FIG. 4 is a perspective view showing the heat exchange unit 60. FIG. The heat exchange unit 60 has a heat exchanger 61 through which warm water flows, and a partition plate 62 that closes the gap between the outer edge of the heat exchanger 61 and the inner wall of the supply air duct 103 . A heat exchanger 61 of the heat exchange unit 60 has a structure in which a plurality of flat tubes 63 are stacked with a gap therebetween. Each flat tube 63 is hollow inside and has a rectangular (herein, substantially square) thin flat plate shape. The height of the internal cavity (water channel) of each flat tube 63 is 0.6 mm, the wall thickness (plate thickness) constituting the internal cavity is 0.2 mm, and the interval between the stacked flat tubes 23 is 2.2 mm. ing. Each size of the flat tube 63 is not limited to this.

The heat exchanger 61 has a hot water inlet 65 and an outlet 66 , and hot water flowing into the inlet 65 passes through the laminated flat tubes 63 and flows out from the outlet 66 .

The structure of heat exchanger 61 will be described in more detail.
Each of the rectangular flat tubes 63 has connecting portions 64 at two corners located on one diagonal line, and the flat tubes 63 adjacent to each other in the stacking direction are connected by the connecting portions 64 . The connection part 64 has a short cylindrical shape protruding from the wall surface of the flat tube 63 to a height of about 1/2 of the stacking interval. Both sides) are provided with a hole communicating with the cylindrical connecting portion 64 .

As shown in FIG. 5, in the present embodiment, as the flat tubes 63, a through-type flat tube 63a in which holes are opened in both front and back wall surfaces at two connecting portions 64 on the diagonal line, and two connecting portions 64 on the diagonal line. Two connection portions 64 have holes in the wall surface on the back side, and the wall surface on the front side has holes at positions corresponding to the connection portions 64 on one side only. There are three types of single-backed flat tubes 63c in which holes are opened in the wall surface on the front side of both connection parts 64, and holes are opened in corresponding positions only on one connection part 64 on the wall surface on the back side. By combining, the heat exchanger 61 of various water flow paths is configured.

For example, as shown in FIG. 6, from the top, one-side flat tube 63b×1, through-type flat tube 63a×2, one-side flat tube 63c×1, one-side flat tube 63b×1, through-type flat tube By stacking two tubes 63a and one single-sided flat tube 63c, a single-reciprocating heat exchanger is constructed in which hot water flows as indicated by the dashed line in the figure. If the number of flat tubes 63 is large, a two-reciprocating type, a three-reciprocating type, and so on may be used. In the case of the reciprocating type, the inflow port 65 and the outflow port 66 are formed on the same connecting portion side.

On the other hand, as shown in FIG. 7, it is also possible to construct a parallel heat exchanger 61 in which hot water flows in the same direction in all flat tubes 63 . In this example, a single front flat tube 63b×1, a penetrating flat tube 63a×5, and a single back flat tube 63c×1 are stacked from above. In the case of the parallel type, the inflow port 65 is formed in one connection portion 64 and the outflow port 66 is formed in the other connection portion 64 . Configurations such as forward, backward, forward are also possible.

By stacking the respective flat tubes 63, the connecting portions 64 of the adjacent flat tubes 63 are connected and connected. By connecting the connecting portions 64 having holes in the wall surfaces, the flat tubes 63 adjacent to each other at that point communicate with each other via the connecting portions 64 .

The partition plate 62 is arranged so as to be perpendicular to each flat tube 63 and oblique to the extending direction of the air supply duct 103 . Here, the connecting portion 64 is arranged along a diagonal line that is different from the diagonal line connecting the two corners (see FIG. 4).

A rectangular opening is formed in the partition plate 62 and the heat exchanger 61 is accommodated therein.

The passage area of the air supply duct 103 is the smallest at the opening of the partition plate 62 . When the partition plate 62 is provided perpendicular to the extending direction of the air supply duct 103 and the cross section of the air supply duct 103 is circular, the rectangular opening of the maximum size that can be formed in the partition plate 62 is a square. . On the other hand, if the partition plate 62 is arranged obliquely to the extending direction of the air supply duct 103, the outer shape of the partition plate 62 becomes elliptical. The rectangular opening becomes rectangular and has a larger opening area than the square opening described above. As a result, the ventilation resistance when the airflow in the air supply duct 103 passes through the heat exchanger 61 can be kept small.

Next, operations related to various functions of the bath system 8 will be described.

<Hot water supply operation>
When the hot water tap is opened and the water sensor 15 of the hot water supply and heating heat source unit 10 detects water flow, the control unit 93 turns on the combustion fan (not shown) to ignite the burner on the first heat exchanger 11 side for combustion. Burn the gas. The feed water flowing from the feed water source into the feed pipe 13 is heated when passing through the first heat exchanger 11 (the sensible heat exchanger 11a and the latent heat heat exchanger 11b), and further the bypass servo 18 adjusts the amount of water in the bypass pipe. The hot water is mixed with the water supply from 17, heated to the set temperature, and discharged from the hot water supply pipe 14 to the hot water tap.

<Pouring operation>
The hot water pouring operation is executed when automatic operation of the bath is started or when an instruction for pouring hot water is received from the user via the bath remote controller 97 or the like (see FIG. 16). In the pouring operation, the control unit 93 opens the pouring valve 37, operates the combustion fan, ignites the burner on the first heat exchanger 11 side, and burns the combustion gas. Furthermore, the fifth solenoid valve 54 of the path switching unit 40 is opened. As a result, the hot water generated in the same manner as the hot water supply operation flows into the water pipe 35 through the hot water pouring pipe 36, passes through the fifth solenoid valve 54 and the fifth pipe 53 in the path switching unit 40, and flows from the bath pipe 90 to the bathtub 5. be dropped into.

<Reheating operation>
FIG. 8 shows the flow of hot water during the reheating operation. The reheating operation is performed when the temperature of the bathtub water in the bathtub 5 is raised to the bath set temperature after the above hot water pouring operation is performed based on the instruction of the automatic operation of the bath and the water is filled to the set water level. Alternatively, it is executed when the temperature of the hot water in the bathtub 5 is raised to maintain the bath set temperature during the automatic operation of the bath, or when the bath remote control 97 or the like is operated by the user to instruct reheating.

In the reheating operation, the control unit 93 opens the flow control valve 29, operates the heating circulation pump 26, operates the combustion fan, ignites the burner on the second heat exchanger 12 side, and burns the combustion gas. Let As a result, from the cistern 25, the heating circulation pump 26, the sensible heat exchanger 12a of the second heat exchanger 12, the flow control valve 29, the primary side of the reheating water-water heat exchanger 30, the return pipe 31, the return to the machine Hot water circulates in a circuit returning to the cistern 25 via the pipe 24 and the latent heat exchanger 12 b of the second heat exchanger 12 . The circulating hot water is heated when passing through the second heat exchanger 12 .

Further, along with this operation, an operation of circulating the hot water in the bathtub 5 to the secondary side of the reheating water-water heat exchanger 30 is performed. Specifically, the fourth solenoid valve 52 and the fifth solenoid valve 54 of the path switching unit 40 are opened, and the bath circulation pump 34 of the hot water supply/heating heat source machine 10 is operated. As a result, the bath return pipe 89 from the bathtub 5, the fourth solenoid valve 52 and the fourth pipe 51 in the path switching unit 40, the water pipe 32, the bath circulation pump 34, the bath water switch 33, the reheating water-water heat exchanger 30 , the water pipe 35 , the fifth solenoid valve 54 and the fifth pipe 53 in the path switching unit 40 , and the bath pipe 90 to return to the bathtub 5 . When the bathtub water passes through the secondary side of the reheating water-water heat exchanger 30, it heat-exchanges with the hot water circulating on the primary side of the reheating water-water heat exchanger 30 and is heated.

<Air supply preheating operation>
The supply air preheating operation includes various operations shown in (1) to (5) below.
(1) Heating operation is performed by the hot water mat 3 for floor heating, while the heat exchange unit 60 in the living room preheats the supplied air. FIG. 9 shows the flow of hot water in the above case. This operation is performed, for example, when heating the living room with the warm water mat 3 for floor heating immediately after returning home on a cold night.

The control unit 93 sets the switching valve 84 so that the incoming pipe 82 of the heating circuit and the inlet side of the warm water mat 3 for floor heating are communicated, closes the flow control valve 29, and closes the outgoing pipe 82 side of the thermal valve branch header 28. is opened, the circulation pump 26 for heating is operated, and the temperature of the hot water flowing through the second heat exchanger 12 is increased by the burner on the second heat exchanger 12 side. As a result, hot and cold water sent out from the heating circulation pump 26 is distributed through the in-floor supply pipe 27, the thermal valve branch header 28, the supply pipe 82, the hot water mat 3 for floor heating, the water pipe 83, the heat exchange unit 60 in the living room, It circulates so as to return to the suction side of the return pipe 81 , the collective header 23 , the internal return pipe 24 , the latent heat exchanger 12 b of the second heat exchanger 12 , the cistern 25 , and the heating circulation pump 26 . Also, in order to increase the temperature of the hot water circulating in the heating circuit, part of the hot water sent from the heating circulation pump 26 is heated by the sensible heat exchanger 12a of the second heat exchanger 12 and sent to the sister 25. Flow to enter.

(2) Air supply preheating is performed by the heat exchange unit 60 in the living room without performing heating by the hot water mat 3 for floor heating FIG. 10 shows the flow of hot water in the above case. This operation is performed, for example, after the room is sufficiently warmed up by the operation (1). Even if the room warms up, the outside air is cold, so preheating of supplied air is continued.

The control unit 93 sets the switching valve 84 so that the hot water from the outgoing pipe 82 bypasses the hot water mat 3 for floor heating, closes the flow control valve 29, and closes the thermal valve branch header 28 on the outgoing pipe 82 side. The thermal valve is opened, the heating circulation pump 26 is operated, and the temperature of the hot water flowing through the second heat exchanger 12 is raised by the burner on the second heat exchanger 12 side. As a result, the hot water sent out from the heating circulation pump 26 flows through the in-apparatus supply pipe 27, the thermal valve branch header 28, the supply pipe 82, the switching valve 84, the water pipe 83, the heat exchange unit 60 in the living room, the return pipe 81, It circulates so as to return to the collective header 23 , the internal return pipe 24 , the latent heat exchanger 12 b of the second heat exchanger 12 , the sister 25 , and the suction side of the heating circulation pump 26 . Also, in order to increase the temperature of the hot water circulating in the heating circuit, part of the hot water sent from the heating circulation pump 26 is heated by the sensible heat exchanger 12a of the second heat exchanger 12 and sent to the sister 25. Flow to enter.

(3) Heating is not performed by the hot water mat 3 for floor heating, and the heat exchange unit 60 in the living room and the heat exchange unit 60 in the bedroom etc. are used to preheat the supplied air. showing. In this operation, when the heating load is too small in the operation (2) and the thermal efficiency of the hot water supply/heating heat source device 10 is significantly reduced, hot water is supplied to the heat exchange unit 60 in the bedroom or the like to increase the heating load, thereby increasing the amount of heat. It is done in cases such as aiming for effective utilization.

The control unit 93 sets the switching valve 84 so that the hot water from the outgoing pipe 82 bypasses the hot water mat 3 for floor heating, closes the flow control valve 29, and closes the thermal valve branch header 28 on the outgoing pipe 82 side. Open the thermal valve and the thermal valve on the hot water supply pipe 87 side, open the first electromagnetic valve 42 and the second electromagnetic valve 44 of the path switching unit 40, operate the heating circulation pump 26, and operate the second heat exchanger. The burner on the 12 side heats up the hot water flowing through the second heat exchanger 12 . As a result, the hot water sent out from the heating circulation pump 26 enters the thermal valve branch header 28 from the in-machine supply pipe 27, and part of it is supplied to the supply pipe 82, the switching valve 84, the water pipe 83, and the heat exchange unit in the living room. 60 , return pipe 81 , collective header 23 , in-machine return pipe 24 , latent heat exchanger 12 b of second heat exchanger 12 , cistern 25 , and suction side of heating circulation pump 26 circulates. In addition, the hot water branched at the thermal valve branch header 28 and flowed to the hot water supply pipe 87 side passes through the second pipe 43 and the second solenoid valve 44 in the route switching unit 40, passes through the heat radiation supply pipe 85, and heats the bedroom. It flows through the replacement unit 60 and the heat radiation return pipe 86 , passes through the first pipe 41 and the first solenoid valve 42 in the route switching unit 40 , and flows back from the hot water return pipe 88 to the collective header 23 . In order to raise the temperature of the hot water circulating in the heating circuit, part of the hot water sent out from the heating circulation pump 26 is heated by the sensible heat exchanger 12a of the second heat exchanger 12 and sent to the sister 25. Flow to enter.

(4) Circulate hot water for heating to preheat supplied air in the heat exchange unit 60 of the bedroom or the like FIG. 12 shows the flow of hot water in the above case. This operation is performed in the bedroom while sleeping, for example.

The control unit 93 closes the flow control valve 29, opens the thermal valve on the hot water supply pipe 87 side of the thermal valve branch header 28, opens the first electromagnetic valve 42 and the second electromagnetic valve 44 of the path switching unit 40, The heating circulation pump 26 is operated, and the temperature of the hot water flowing through the second heat exchanger 12 is raised by the burner on the second heat exchanger 12 side. As a result, the hot water sent out from the heating circulation pump 26 passes through the in-machine supply pipe 27, the thermal valve branch header 28, the hot water supply pipe 87, the second pipe 43 in the path switching unit 40, and the second electromagnetic valve 44. , the heat radiation supply pipe 85, the heat exchange unit 60 in the bedroom, the heat radiation return pipe 86, the first pipe 41 in the route switching unit 40, the first solenoid valve 42, and the hot water return pipe 88 to the collective header 23. , the in-machine return pipe 24, the latent heat exchanger 12b of the second heat exchanger 12, the cistern 25, and the suction side of the circulation pump 26 for heating. Also, in order to increase the temperature of the hot water circulating in the heating circuit, part of the hot water sent from the heating circulation pump 26 is heated by the sensible heat exchanger 12a of the second heat exchanger 12 and sent to the sister 25. Flow to enter.

(5) Circulate Bathtub Water to Preheat Supply Air in Heat Exchange Unit 60 in Bedroom, etc. FIG. 13 shows the flow of hot water in the above case. This operation is performed for the heating purpose of warming the outside air and introducing it into the bedroom, and is also performed as an operation related to the bath warming function of forcibly lowering the temperature of the bathtub water in the bathtub 5 .

The control unit 93 closes the first electromagnetic valve 42, the second electromagnetic valve 44, the fourth electromagnetic valve 52, and the fifth electromagnetic valve 54 of the path switching unit 40, opens the third electromagnetic valve 47, and the sixth electromagnetic valve 57, The first circulation pump 46 and the second circulation pump 56 are operated. As a result, the bathtub water in the bathtub 5 flows from the bathtub 5 into the bath return pipe 89, the sixth pipe 55 in the route switching unit 40, the primary side of the water-water heat exchanger 48, the second circulation pump 56, the sixth electromagnetic It circulates through the valve 57 and the fifth pipe 53 and returns to the bathtub 5 via the bath pipe 90. - 特許庁

On the other hand, the hot and cold water sent out from the first circulation pump 46 passes through the third solenoid valve 47, the secondary side of the water-water heat exchanger 48, the heat radiation supply pipe 85, the heat exchange unit 60 in the bedroom, the heat radiation return pipe 86, the 1 piping 41 and circulates back to the first circulation pump 46 . Bathwater heat through the primary side of water-to-water heat exchanger 48 is transferred to hot water through the secondary side of water-to-water heat exchanger 48 . By this operation, the temperature of the water circulating on the secondary side of the water-water heat exchanger 48 is raised, and the temperature of the bathtub water circulating on the primary side of the water-water heat exchanger 48 is lowered.

Next, the control related to the execution timing of the operation related to the bath cooling function shown in FIG. 13 will be described.

The operation related to the bath cooling function is executed when a predetermined bath cooling condition is satisfied. The bath condition is met in the following cases.

(A) When automatic operation of the bath ends and when it is detected that the last bather has left the bath, the condition for leaving the bath is satisfied.
This is done for the purpose of preventing the growth of germs by immediately lowering the temperature of the bathtub water after bathing for the day, when leaving the hot water in the bath and reheating it for bathing the next day.

FIG. 14 shows a process for activating the bath cooling function when the temperature of the remaining hot water in the bath is lowered to suppress the growth of germs. During the automatic operation of the bath (step S101; No), the control unit 93 determines whether the person entered or exited the bathtub based on the bathtub water level. S102; Yes), the bathing flag is turned off (step S103), and when it is detected that a person has entered the bathtub (step S104; Yes), the operation of turning on the bathing flag (step S105) is repeated. .

When the automatic operation of the bath ends (step S101; Yes), the control unit 93 checks whether the bathing flag is on (step S106). If the bathing flag is off (step S106; Yes), the last bather has already left the bathtub when the automatic operation of the bath ends. S108), this process is terminated.

If the bathing flag is ON when the automatic operation of the bath ends (step S106; No), the person is still in the bathtub when the automatic operation of the bath ends. It waits for detection of getting out of the bathtub (step S107; No). When it is detected that the person has gotten out of the bathtub (step S107; Yes), an operation related to the function of keeping the bath is performed (step S108), and this process ends. The operation related to the bath heating function is performed until the temperature of the bath water drops to a predetermined temperature (for example, 29° C.) at which the growth of germs can be suppressed. It should be noted that 30° C. to 35° C. is said to be the temperature range in which various bacteria easily propagate.

The bath cooling condition may include that the bathtub water remains in the bathtub 5 at a predetermined water level or higher. Further, the bath cooling condition may include setting the remaining hot water to be used for bathing the next day.

(B) When the person gets out of the bathtub, in winter, when reheating is performed during bathing, and when the temperature of the bathtub water is higher than the bath set temperature + n°C, the condition for bathing is satisfied. do.
Since it is difficult for the hot water to cool down in a highly insulated bathtub, if the previous bather manually reheats the water, the hot water will not cool down when the next person enters, and the hot water temperature may be too high for the next person to be comfortable. Therefore, in order to avoid this, when the condition (B) is satisfied, the operation related to the bath function is performed. Note that n°C can be set to any temperature. n°C is, for example, 1°C or 2°C. n may be 0.

FIG. 15 is a flow chart showing the processing when the operation related to the bath cooling function is activated under the condition (B). When the controller 93 detects that one user has finished bathing based on a change in the bathtub water level or the like during automatic operation of the bath (step S201; Yes), the season is winter (step S202; Yes), and If the manual reheating operation is performed while the user is taking a bath (step S203; Yes), and if the current bathtub water temperature is higher than the bath set temperature +n°C (step S204; Yes), the bath cooling function is performed. perform an action. In this case, the bath cooling function is performed until the bath water temperature drops to the bath set temperature. Whether the season is winter or not can be determined from the outside temperature or the date.

If the season is not winter (step S202; No), or if the manual reheating operation is not performed during bathing (step S203; No), or if the current bathtub water temperature is less than the bath set temperature +n°C If not (step S204; No), this process ends without executing the operation related to the bath function.

It should be noted that the bath-refreshing function may be executed based on a user operation such as a bath-refreshing button. The bath cooling condition may include that the bath is in automatic operation. In addition, regardless of whether or not manual reheating has been performed, if the temperature of the bathtub water is higher than the bath set temperature +n°C when one bather leaves the bath, it is considered that the bath cooling condition has been met. You can judge.

(C) If the temperature of the water in the bathtub when the person leaves the bathtub is higher than the bath setting temperature of the next person who makes a reservation for bathing, the condition for bathing is satisfied.
This is a bath setting condition that can be adopted when the bath system 8 has a function of reserving a scheduled bathing time for each user and a function of registering a desired bath setting temperature for each user. If the temperature of the bath water when one person leaves the bath is higher than the bath set temperature of the next person who has made a reservation for bathing, the control unit 93 controls whether the temperature of the water in the bathtub rises before the time when the person who made a reservation for bathing comes to take a bath. A bath cooling function is operated so that the bath temperature is lowered to the bath setting temperature of the bathing reservation person.

FIG. 16 shows a configuration example of a bath system 8 that allows bathing reservations. The control unit 93 of the bath system 8 is connected to a network, and a portable information processing terminal 99 of each user using the bath system 8 is connected to the network. The portable information processing terminal 99 may be a tablet, a smartphone, or the like in which a browser or an application related to the bath system 8 is installed. In the example of FIG. 16, the bath system 8 also has a dedicated bath remote controller 97 .

The control unit 93 of the bath system 8 includes a reservation unit 94 that accepts a bathing reservation for each user, a set temperature registration unit 95 that accepts and registers a set bath temperature for each user, and communication that communicates with a portable information processing terminal 99 via a network. The function of the part 96 is provided. The set bath temperature for each user may be registered in advance, or may be received for each bathing reservation.

Each user makes a bathing reservation from his own portable information processing terminal 99 . For example, Mr. A reserves a bath with a set temperature of 41°C from 18:00 to 18:30, and Mr. B reserves a bath with a set temperature of 39°C from 18:40 to 19:15. A reservation for bathing is made for the bath system 8 at this time.

FIG. 17 shows the flow of processing for controlling the activation of the operation related to the bathing function based on the bathing reservation. When the controller 93 detects that one user has finished bathing from a change in the bathtub water level or the like (step S301; Yes), it checks whether or not the next bathing reservation has been made (step S302). If the next bathing reservation has not been made (step S302; No), this process ends.

If there is a next bathing reservation (step S302; Yes), the bath setting temperature is changed to the bath setting temperature of the next bathing reservation person (step S303). Then, if the bath setting temperature of the next person who makes a reservation for bathing is lower than the current bath water temperature -n°C (step S304; Yes), the operation related to the bath cooling function is executed (step S305). End the process. In this case, the operation related to the bath cooling function is executed until the bath water temperature reaches the bath setting temperature of the next person who makes a reservation for bathing. n°C can be set arbitrarily, for example, 1°C or 2°C. It may be 0°C.

If the next bathing reservation person's bath setting temperature is not lower than the current bathtub water temperature -n°C (step S304; No), the process ends without executing the operation related to the bath cooling function.

In addition, it is predicted whether the bathtub water temperature will drop to the next bather's set bath temperature by the next bather's reservation time just by leaving it alone. An operation related to the function may be executed.

The activation condition for the operation related to the bath heating function is not limited to the above example, and may be arbitrary.

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configurations are not limited to those shown in the embodiments, and modifications and additions may be made without departing from the scope of the present invention. is also included in the present invention.

The heat exchange unit 60 shown in the embodiment is an example. A finned tube type that does not use the flat tube 63 may be used. The heat exchanger used for the bath cooling function is preferably of the type inserted into the air supply duct 103, but is not limited to this.

In the embodiment, the bath water and the water circulating in the heat exchange unit 60 exchange heat in the water-water heat exchanger 48 of the path switching unit 40, but the bath water is directly transferred to the heat exchange unit 60. You may make it circulate.

3 … Radiator for heating (warm water mat for floor heating)
5 Bathtub 8 Bath system 10 Hot water supply and heating heat source 11 First heat exchanger 11a Sensible heat exchanger of first heat exchanger 11b Latent heat exchanger of first heat exchanger 12 Second heat Exchanger 12a Sensible heat exchanger of the second heat exchanger 12b Latent heat heat exchanger of the second heat exchanger 13 Water supply pipe 14 Hot water supply pipe 15 Water quantity sensor 16 Water quantity servo 17 Bypass pipe 18 Bypass Servo 21 Heat exchanger temperature sensor 22 Hot water supply temperature sensor 23 Collective header 24 In-machine return pipe 25 Cistern 26 Heating circulation pump 27 In-machine feed pipe 28 Thermal valve branch header 29 Flow control valve 30 Follower Firing water-water heat exchanger 31 Return pipe 32 Water pipe 33 Bath water switch 34 Bath circulation pump 35 Water pipe 36 Pouring pipe 37 Pouring valve 40 Path switching unit 41 First pipe 42 Second 1 solenoid valve 43... second pipe 44... second solenoid valve 45... third pipe 46... first circulation pump 47... third solenoid valve 48... water-water heat exchanger 51... fourth pipe 52... fourth solenoid valve 53... Fifth pipe 54... Fifth solenoid valve 55... Sixth pipe 56... Second circulation pump 57... Sixth solenoid valve 60... Heat exchange unit 61... Heat exchanger 62... Partition plate 63... Flat tube 63a... Penetration type Flat tube 63b Single-front flat tube 63c Single-back flat tube 64 Connection part 65 Inflow port 66 Outflow port 81 Return pipe 82 Outbound pipe 83 Water pipe 84 Switching valve 85 Heat radiation outbound pipe 86 Heat radiation return pipe 87 Hot water return pipe 88 Hot water return pipe 89 Bath return pipe 90 Bath flow pipe 93 Control unit 94 Reservation unit 96 Communication unit 97 Bath remote controller 99 Portable information processing terminal 101 Ventilation fan 102... Suction port 103... Air supply port (air supply duct)
104... Exhaust port 108... Air supply port cover

Claims (5)

a heat exchanger installed in a supply air duct that penetrates the wall and connects the outdoors and the indoors;
a circulating device for circulating the heat medium fluid heated by exchanging heat with the bathtub water or the bathtub water in the bathtub through the heat exchanger;
a control unit for controlling execution of a bath cooling operation for operating the circulation device to lower the temperature of the bath water in the bath below the current temperature;
a reservation unit that receives bathing reservations from users;
a set temperature registration unit that receives and registers bath set temperature for each bather;
with
The control unit operates the circulation device when a predetermined bath cooling condition, which is a criterion for determining whether the temperature of the water in the bathtub should be lowered below the current temperature, is established , and
The condition for bathing includes that, when one user finishes bathing, the bath setting temperature of the next person who makes a reservation for bathing is lower than the current bath water temperature by a predetermined temperature or more.
A bathing system characterized by: a heat exchanger installed in a supply air duct that penetrates the wall and connects the outdoors and the indoors;
a circulating device for circulating the heat medium fluid heated by exchanging heat with the bathtub water or the bathtub water in the bathtub through the heat exchanger;
a control unit for controlling execution of a bath cooling operation for operating the circulation device to lower the temperature of the bath water in the bath below the current temperature;
A reservation department that accepts bathing reservations,
a setting temperature registration unit that receives and registers the bath setting temperature related to the bathing reservation;
with
The control unit operates the circulation device when a predetermined bath cooling condition, which is a criterion for determining whether the temperature of the water in the bathtub should be lowered below the current temperature, is established , and
The condition for bath cooling includes that when one user finishes bathing, the bath setting temperature related to the next bathing reservation is lower than the current bathtub water temperature by a predetermined temperature or more.
A bathing system characterized by: 3. The bath cleaning system according to claim 1, wherein the bath cleaning conditions include completion of automatic operation of the bath and that the last bather has left the bath. The condition for bathing is winter, manual reheating is performed while a person is taking a bath, and the bath water temperature is higher than the bath setting temperature by a predetermined temperature or more when the person getting out of the bath. The bath cooling system according to claim 1 or 2 , characterized by comprising: In the heat exchanger, a plurality of hollow flat tubes are stacked at intervals, and adjacent flat tubes are connected in the stacking direction by connecting portions at one end side and the other end side, respectively, 5. The bath cooler according to any one of claims 1 to 4, wherein the fluid that has flowed into the inflow port flows out of the outflow port through each flat tube and the connecting portion. system.

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