JP5089727B2 - Bathroom mist equipment - Google Patents

Description

  The present invention relates to a bathroom mist device, and more particularly, to a bathroom mist device in which a sauna effect is obtained by spraying hot and cold water in a mist form in a bathroom.

In recent years, bathroom mist devices that increase the sauna effect by spraying heated hot water in a mist form from a mist spraying section installed in the bathroom are becoming popular with bathroom heating devices.
When the hot water for hot water supplied to the kitchen or washroom is branched and used as it is in the mist device, the minimum amount of water that must be passed through the heat exchanger to burn the burner, Even if it is the so-called minimum working water amount, the amount of warm water suitable for spraying mist is large, so if this is sprayed from the mist spraying section, the mist particle size becomes large and the user feels uncomfortable. There was an inconvenience such as giving. Further, in order to reduce the amount of hot water supplied to the mist spraying part, it is conceivable to discharge a part of the hot water, but this is a waste of resources and has a disadvantage of increasing running cost (Patent Document). 1).
In order to prevent such inconvenience, as shown in FIG. 4 , the mist spraying section (1) is provided at the downstream end of the water supply circuit for mist (11) for supplying tap water, and the mist spraying section (1) is provided. There is known a configuration in which a liquid-liquid heat exchanger (10) is provided in the middle of the flow path to reach the tap water with a heat medium supplied through a heating circuit (Patent Documents 2 and 3). .

In this, the bathroom heating device (20) is installed in the bathroom (4), and the hot water supply device (2) with a built-in heat source part (23) for bathroom heating is installed outdoors as a heat source, Through the branch circulation circuit (22) branched from the circulation heating circuit (21) circulating between the heating heat source section (23) and the bathroom heating device (20), the liquid heat exchanger (10 ) Is supplied with hot water as the heat medium. Accordingly, the water in the water supply circuit for mist (11) is set to be warmed through the liquid heat exchanger (10).
The liquid heat exchanger (10) is preferably a plate-type heat exchanger with high efficiency, and water on the mist water supply circuit (11) side and branch circulation circuit on both sides of the heat transfer plate (10a). When the hot water on the (22) side flows alternately, heat is exchanged via the heat transfer plate (10a).

In this case, the amount of water to be passed through the water supply circuit for mist (11) is not restricted by the minimum amount of working water, so it should be set to a predetermined amount suitable for spraying from the mist spraying section (1). Can do. Therefore, it is possible to spray the warm water of the water supply circuit for mist (11) heated through the liquid heat exchanger (10) from the mist spraying part (1) into the bathroom (4) with an appropriate mist particle size. it can.
In the above-described conventional mist device, the first and second solenoid valves (31), (32) as opening / closing valves for opening / closing the water supply circuit (11) for the mist are provided downstream of the liquid heat exchanger (10). An automatic drain valve (30) of the water pipe (12) branched from between the first and second solenoid valves (31) and (32) is provided upstream of the liquid heat exchanger (10). Is provided with a pressure reducing valve (36) for adjusting the water pressure in the water supply circuit for mist (11). In addition, a flow control valve for adjusting the flow rate of the circulating hot water sent from the circulation heating circuit (21) to the branch circulation circuit (22) is provided at the branch portion branched from the circulation heating circuit (21) to the branch circulation circuit (22). And a heat exchanger thermistor (34) for detecting the temperature of the circulating hot water.

  At the start of operation of the mist device, the flow rate control valve (33) is fully opened, hot water is sent from the circulation heating circuit (21) to the branch circulation circuit (22), and is branched together with the hot water in the circulation heating circuit (21). By circulating the hot water in the circulation circuit (22), the hot water is warmed to an appropriate temperature. When it is detected by the heat exchanger thermistor (34) that the circulating hot water is sufficiently warm, the second solenoid valve (32) and the automatic drain valve (30) are opened with the first solenoid valve (31) closed, Heat exchange by the liquid heat exchanger (10) is started. The temperature of hot water in the water supply circuit for mist (11) is detected by the mist thermistor (35) provided on the downstream side of the liquid-to-liquid heat exchanger (10). Discharged from the tube (12). When the mist thermistor (35) detects that the temperature of the hot water in the mist water supply circuit (11) is stable, the automatic drain valve (30) is closed and the first electromagnetic valve (31) Is opened, and mist is sprayed from the mist spraying section (1) into the bathroom (4). Thereby, it is possible to spray hot water having an appropriate temperature instead of cold water from the mist spraying section (1) from the initial operation of the mist device.

  After the operation of the mist device is completed, if both the first solenoid valve (31) and the automatic drain valve (30) are opened with the second solenoid valve (32) closed, the second solenoid valve (32 ) To the mist spraying section (1), residual water in the mist hot water supply channel (13) is drained from the drain pipe (12) by natural fall. Thus, various bacteria are propagated in the hot water remaining in the hot water supply channel (13) for mist to become sewage, and this sewage prevents inconvenience of spraying from the mist spraying section (1) at the next mist spraying.

JP 2002-000489 A Japanese Patent Laid-Open No. 2003-334230 Japanese Patent Application No. 2004-239284

  However, generally, an antifreeze liquid such as propylene glycol is introduced into the circulating hot water for heating, and this is supplied to the liquid heat exchanger (10). For example, when the plate heat exchanger described above is used as the liquid heat exchanger (10), the water and mist water supply circuit (11) through the branch circulation circuit (22) side in which the antifreeze liquid is mixed are used. The supplied tap water is configured to alternately flow on both sides of the heat transfer plate (10a). Therefore, in the unlikely event that the heat transfer plate (10a) has a hole or the like and the warm water mixed with the antifreeze liquid has entered the mist water supply circuit (11), the mist water supply circuit (11 ) Becomes negative pressure under some conditions, the antifreeze liquid flows backward through the water supply circuit for mist (11). Since the circulating hot water is circulated and used for many years, it becomes sewage. If the circulating hot water flows backward, there is a problem that the upstream water supply is contaminated.

  The present invention has been made in view of such a point, and “a liquid medium heat exchanger supplied from a heat source device through a circulation heating circuit and heating water supplied through a water supply circuit for mist; In the mist apparatus for bathroom provided with a mist spraying section for spraying hot water in the water supply circuit for mist heated by a heat exchanger into the bathroom, the sewage in the circulation heating circuit is supplied to the water supply circuit for mist. It is an object of the present invention to prevent contaminated water from flowing backward in the mist water supply circuit to the upstream side even if mixed into the mist.

[Invention of Claim 1]
The technical means of the invention according to claim 1 for solving the above-mentioned problem is as follows: "A reverse flow that prevents a reverse flow in the water supply circuit for the mist is provided upstream of the liquid heat exchanger of the water supply circuit for the mist. A check valve to prevent
A first on-off valve and a second on-off valve as an on-off valve for opening and closing the water supply circuit for mist are provided in series on the downstream side of the liquid heat exchanger , and between the first on-off valve and the second on-off valve. A drain valve,
Supply of water to the water supply circuit for mist by opening the second on-off valve and the drain valve on the upstream side at the same time as the operation of the heat source apparatus is started and the supply of the heat medium to the liquid-to-liquid heat exchanger is started. The hot water in the mist water supply circuit is discharged from the drain valve, and when the temperature of the mist water circuit exceeds the set temperature for mist spraying, the first on-off valve on the downstream side is opened and the drain valve is closed. It is set to start spraying hot water from the mist spraying section .
The technical means operates as follows.
The circulation heating circuit is connected, for example, between a heating terminal such as a floor heating device or a bathroom heating device and a heating heat source unit, and hot water (circulation hot water) circulating in the circulation heating circuit is heated. Water supplied as a medium to the primary side of the liquid-to-liquid heat exchanger and supplied through the water supply circuit for mist on the secondary side is heated. Even if the circulating hot water may be mixed in the water supply circuit for mist in the heat exchanger due to breakage of the liquid heat exchanger, etc., it will be upstream of the liquid heat exchanger. Since the check valve is provided, the circulating hot water does not flow back to the mist water supply circuit upstream.

Incidentally, in the closed state of the said opening and closing valve, between said opening and closing valve the check valve becomes a possible closed space is formed, the portion thereof Ru is heated by a liquid-liquid heat exchanger The hot water in the closed space in the water supply circuit for mist expands in volume, which causes an inconvenience that excessive pressure is applied to the on-off valve, causing spray failure without opening the on-off valve. Further, even when warm water does not flow through the water supply circuit for mist, the same phenomenon occurs because the gas in the closed space expands in volume.

Therefore, the technical means of the invention according to claim 1 is that the operation of the heat source unit is started and the supply of the heat medium to the liquid heat exchanger is started at the same time as the second on-off valve and drain valve on the upstream side. Is set so that the water supply to the mist water supply circuit is started and the hot water in the mist water supply circuit is discharged from the drain valve. Thereby, the hot water in the space between the on-off valve (the first on-off valve and the second on-off valve) and the check valve is heated by the liquid heat exchanger, but the operation of the heat source machine is Since the second on-off valve and the drain valve on the upstream side are opened at the same time as the supply of the heat medium to the liquid heat exchanger is started, the space is opened to the downstream side, The internal pressure between the second on-off valve and the check valve does not increase.
When the temperature of the water supply circuit for mist becomes equal to or higher than the set temperature for mist spraying, the first on-off valve on the downstream side is opened and the drain valve is closed to start spraying hot water from the mist spraying section. ing. Thereby, it is possible to spray hot water having an appropriate temperature from the mist spraying section instead of cold water from the initial operation of the mist device.

[Invention of Claim 2 ]
Technical means of the invention according to claim 2 is the bathroom mist device according to claim 1, upstream of and the on-off valve in the downstream side of the "front Kigyakutomeben, the internal pressure of the mist water supply circuit are those "overpressure relief is provided with means for releasing, liquid-liquid heat exchanger is provided between the check valve and the on-off valve, the hot water in the space between said on-off valve the check valve Although it is heated by the liquid heat exchanger, since the pressure in the space between the on-off valve and the check valve is released by the overpressure release means, the on-off valve and the check valve The internal pressure between is not increased.

The present invention has the following specific effects.
In the invention according to claim 1, since the check valve of the water supply circuit for mist is provided on the upstream side of the liquid heat exchanger, it is possible to prevent the backflow to the water supply upstream of the water supply circuit for mist. Even if circulating hot water, which is sewage in the circulation circuit, is mixed in the mist water supply circuit in the liquid heat exchanger, there is no inconvenience that the clean water is sewed.
In addition , a check valve for the water supply circuit for mist is provided upstream of the liquid-liquid heat exchanger, and even if the water supply circuit for mist is heated by the liquid-liquid heat exchanger, excessive pressure is applied to the on-off valve. Therefore, there is no inconvenience that the on-off valve does not open at the start of operation of the mist device. Therefore, the usability of the mist device is improved and the spraying failure from the mist spraying portion can be prevented. The water supply circuit for mist is heated by the liquid heat exchanger at the time of warm-up in the initial stage of operation of the mist device as described above, but even in this case, it may hinder the opening operation of the on-off valve. Absent.

Furthermore , even in a circuit having a configuration in which an on- off valve is provided on the downstream side of the liquid-to-liquid heat exchanger, it is possible to prevent inconvenience that excessive pressure is applied to the on-off valve, so that control can be performed without changing the circuit. it can be obtained on the climate results by simply changing the.
In the invention according to claim 2, it is possible to obtain a circuit configuration provided with an opening and closing valve on the downstream side of the liquid-liquid heat exchanger, the effect that the overpressure relief incorporate means.

Explanatory drawing which shows the circuit of a mist apparatus as a reference example . The flowchart figure which shows the processing content of the spray control of the mist apparatus in 1st Embodiment . Explanatory drawing which shows the circuit of the mist apparatus in 2nd Embodiment. Explanatory drawing which shows the circuit of the conventional mist apparatus.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
[ Reference examples ]
Those shown in FIG. 1 is an explanatory diagram showing a circuit of a mist apparatus in reference example.
The bathroom (4) is provided with a mist spraying section (1) and a bathroom heating device (20), and the bathroom heating device (20) has a hot water supply device (2 as a heat source device installed outdoors). ) Is supplied with warm water through the circulation heating circuit (21), and the mist spray section (1) communicates with a water supply circuit for mist (11) provided separately from the circulation heating circuit (21). .
The hot water supply device (2) has a heat source section (24) for supplying hot water for supplying hot water to a kitchen or a washroom, and a heat source section (23) for heating for supplying hot water for floor heating or bathroom heating. Is provided. Each heat source section (23) (24) is composed of a burner and a heat exchanger.The heat exchanger of the hot water supply heat source section (24) includes an upstream water supply pipe (25a) and a downstream hot water supply. The pipe (25b) is connected, and the heating device of the heating heat source section (23) is connected to the bathroom heating device (20), which is a heating terminal, via the circulation heating circuit (21). . The circulation heating circuit (21) is connected to another heating terminal together with the bathroom heating device (20).

A branch circulation circuit (22) is branched to the circulation heating circuit (21), and hot water heated by combustion of the burner of the heating heat source section (23) circulates in the circulation heating circuit (21). At the same time, by circulating in the branch circuit (22), the hot water circulating in the branch circuit (22) is supplied to the primary side of the liquid heat exchanger (10) as a heat medium.
The liquid-to-liquid heat exchanger (10) has a flow path formed between a plurality of heat transfer plates (10a) arranged in parallel, hot water circulating in the branch circulation circuit (22), and water supply for mist on the secondary side The plate heat exchanger is configured such that heat can be exchanged through the heat transfer plate (10a) by being configured such that water flowing in the circuit (11) flows alternately.
Thereby, the water supplied through the water supply circuit for mist (11) is heated by the hot water circulating through the branch circulation circuit (22) via the liquid-liquid heat exchanger (10).
As with the conventional mist circuit described above, the flow control valve (33) and the thermistor (34) are provided at the branch from the circulation heating circuit (21) to the branch circulation circuit (22). . A mist thermistor (35) is provided downstream of the liquid heat exchanger (10) in the mist water supply circuit (11), and a pressure reducing valve (36) and a check valve are provided upstream. (37) is provided.

In the mist circuit of the reference example , an electromagnetic valve (3) as an on-off valve for opening and closing the mist water supply circuit (11) is provided on the upstream side of the liquid heat exchanger (10), and the liquid An automatic drain valve (30) is provided in the drain pipe (12) branched from the upstream side of the heat exchanger (10) and from the downstream side of the solenoid valve (3), and the mist water supply circuit (11) The hot water is set to be discharged from the drain pipe (12).
The operation of the bathroom heating device (20) and the mist spraying section (1) is set to be remotely operable, and although not shown, when the mist operation switch of the remote control is turned ON, the heating heat source section (23) is activated. At the same time, the flow control valve (33) is maintained at the set opening, and the hot water in the circulation heating circuit (21) and the branch circulation circuit (22) circulates. Whether the temperature of the hot water is equal to or higher than a set temperature at which the water in the water supply circuit for mist (11) can be effectively heated by the liquid-to-liquid heat exchanger (10) is detected by the thermistor (34) and heated. If it is above the set temperature to be obtained, the solenoid valve (3) is opened, and tap water is passed through the water supply circuit for mist (11). At this time, the automatic drain valve (30) is closed.

The water passed through the water supply circuit for mist (11) is heated when passing through the liquid heat exchanger (10) and sprayed from the mist spraying section (1) to the bathroom (4) in a mist form. Can do. The flow rate control is performed so that the water pressure in the water supply circuit for mist (11) is held constant by the pressure reducing valve (36) and the temperature detected by the mist thermistor (35) is held at the set temperature for mist spraying. The flow rate fed to the branch circuit (22) is adjusted by the valve (33).
When the mist operation switch is turned off, the solenoid valve (3) is closed and the automatic drain valve (30) is opened, and the heating heat source (23) is stopped. The solenoid valve (3) and the automatic drain valve (30) are provided on the upstream side of the liquid heat exchanger (10), and are disposed at a position lower than the mist spraying section (1). Therefore, the residual water in the water supply circuit for mist (11) flows back in the water supply circuit for mist (11) due to natural fall and is blocked by the electromagnetic valve (3), and an automatic drain valve (30 ) Through the drain pipe (12). Thus, hot water does not remain in the mist water supply circuit (11) after use on the downstream side of the solenoid valve (3). Therefore, it is not necessary to drain the residual water from the mist spraying section (1) at the next use, and the running cost can be saved.

In the above reference example , the check valve (37) for preventing the backflow of water in the mist water supply circuit (11) and the solenoid valve (3) for opening and closing the mist water supply circuit (11) The mist water supply circuit (11) corresponding to the liquid heat exchanger (10) is provided on the upstream side of the heat exchanger (10), and the downstream side of the mist water supply circuit (11) is set open. The inside does not block. Therefore, even if the water supply circuit for mist (11) is heated by the mist operation warm-up and the freeze prevention operation for heating and circulating the circulation heating circuit (21), no pressure is applied to the solenoid valve (3). There is no inconvenience that the solenoid valve (3) is difficult to open. Thus, the mist device can be used without any trouble even during the freeze prevention operation.
In addition, generally, an antifreeze liquid such as propylene glycol is added to the hot water as a heat medium circulating in the circulation heating circuit (21) and the branch circulation circuit (22), and this is mixed and supplied to the mist water supply circuit. (11) It is not preferable that the inside is contaminated, but in the unlikely event that the liquid heat exchanger (10) is damaged, the antifreeze liquid input water is mixed into the mist water supply circuit (11). However, since the check valve (37) can prevent further backflow, the antifreeze is mixed into the water supply upstream of the water supply circuit for mist (11) and the water is contaminated. Can be prevented.

[About the first embodiment]
Flowchart shown in FIG. 2 is related to control of the mist operation of the first embodiment, the circuit for mist device, in a similar circuit to that of the prior art shown in FIG. 4, a liquid-liquid heat exchanger (10) having a structure in which a check valve (37) on the upstream side is employed.
With reference to FIG. 2, in this embodiment, when it is determined in step S1 that the operation switch has been turned ON and the start of mist operation is commanded, in step S2, a heating heat source is generated. Section (23) operates, the flow control valve (33) is maintained at the set opening, and the heat medium from the circulation heating circuit (21) to the liquid-to-liquid heat exchanger (10) via the branch circulation circuit (22) Supply of hot water as is started. At the same time, the second solenoid valve (32) and the automatic drain valve (30) are opened, and the supply of tap water to the mist water supply circuit (11) is started. When the mist thermistor (35) detects that the temperature (TW) in the mist water supply circuit (11) is equal to or higher than the mist spraying temperature (YT) in step S3, the process proceeds to step S4. Thus, the first electromagnetic valve (31) is opened, the automatic drain valve (30) is closed, and hot water is sprayed from the mist spraying section (1) to the bathroom (4). In this embodiment, while the temperature (TW) detected by the mist thermistor (35) is equal to or lower than the mist set temperature (YT), the mist water supply circuit (30) is provided via the automatic drain valve (30). 11) It is set to discharge the hot water in the drain pipe (12).
When the mist operation switch is turned OFF in step S5 and the mist operation is stopped, the process proceeds to step S6, the second solenoid valve (32) is closed and the automatic drain valve (30) is opened. Then, the residual water on the downstream side of the second solenoid valve (32) is drained.
In this embodiment, since the second solenoid valve (32) is opened and hot water is passed through the mist water supply circuit (11) from the start of the mist operation, the water in the mist water supply circuit (11) is opened. Pressure does not increase.

[About the second embodiment]
FIG. 3 is an explanatory view showing a circuit of the mist device in the second embodiment. Like the conventional circuit shown in FIG. 4 , an open / close valve is provided on the downstream side of the liquid heat exchanger (10). The first and second solenoid valves (31) and (32) are arranged as an overpressure relief means upstream of the second solenoid valve (32) and downstream of the check valve (37). When a blow valve (40) is provided and the pressure in the water supply circuit for mist (11) between the second solenoid valve (32) and the check valve (37) becomes equal to or higher than a set operating pressure, the blow valve (40) opens to release pressure. Due to the combustion of the heating heat source section (23), the water supply circuit for mist (11) is heated via the liquid heat exchanger (10), and the second expansion occurs due to the volume expansion of the hot water in the water supply circuit for mist (11). The internal pressure of the water supply circuit for mist (11) increases between the solenoid valve (32) and the check valve (37), but when the pressure exceeds the set operating pressure, the blow valve (40) is activated. Thus, since the hot water in the mist water supply circuit (11) is set to be discharged, the pressure in the mist water supply circuit (11) does not increase excessively. Therefore, even if the second electromagnetic valve (32) is disposed on the downstream side of the liquid-liquid heat exchanger (10), there is no inconvenience that the second electromagnetic valve (32) is not opened due to pressure.
In the embodiment of the present invention, the blow valve is used as the overpressure releasing means. However, if the pressure is not increased by using the accumulator, the drainage does not occur like the blow valve, and the wastewater is treated. There is no need to consider.

(1) ・ ・ ・ ・ ・ ・ Mist spraying part
(10) ... Liquid heat exchanger
(11) ・ ・ ・ ・ ・ ・ Water supply circuit for mist
(2) ・ ・ ・ ・ ・ ・ Heat source machine (hot water supply equipment)
(21) ... Circulating heating circuit
(3) ・ ・ ・ ・ ・ ・ Open / close valve (solenoid valve)
(37) ・ ・ ・ ・ ・ ・ Check valve
(4) ・ ・ ・ ・ ・ ・ Bathroom

Claims (2)

A heat medium supplied from a heat source device through a circulation heating circuit, a liquid-to-liquid heat exchanger for heating water supplied through a mist water supply circuit, and a mist water supply circuit heated by the liquid-to-liquid heat exchanger In a bathroom mist device equipped with a mist spraying section for spraying hot water into the bathroom,
On the upstream side of the liquid heat exchanger of the water supply circuit for mist, a check valve for preventing a back flow in the water supply circuit for mist is provided,
A first on-off valve and a second on-off valve as an on-off valve for opening and closing the water supply circuit for mist are provided in series on the downstream side of the liquid heat exchanger , and between the first on-off valve and the second on-off valve. A drain valve,
Supply of water to the water supply circuit for mist by opening the second on-off valve and the drain valve on the upstream side at the same time as the operation of the heat source apparatus is started and the supply of the heat medium to the liquid-to-liquid heat exchanger is started. The hot water in the mist water supply circuit is discharged from the drain valve, and when the temperature of the mist water circuit exceeds the set temperature for mist spraying, the first on-off valve on the downstream side is opened and the drain valve is closed. A mist device for a bathroom that is set to start spraying hot water from the mist spraying section . In the bathroom mist device according to claim 1,
A bathroom mist device provided with an overpressure release means for releasing the internal pressure of the water supply circuit for mist on the downstream side of the check valve and the upstream side of the on-off valve.

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