JPH07286739A - Warm water supplying apparatus - Google Patents

Abstract

PURPOSE:To always execute mixing of hot water and cold water by a hot water and water mixing valve and regulation of its temperature in a stable state irrespective of number of an assembled hot water supply implement connected to a secondary side. CONSTITUTION:A large capacity large-sized hot water and water mixing valve 1 and a small capacity small-sized hot water and water mixing valve 4 are connected in parallel between hot water and cold water supply pipes 2, 3 and a hot water supply pipe 5 for supplying warm water to an assembled hot water supply implement. A pressure detection type automatic switching valve 6 for stopping hot water supply from the valve 1 when a pressure in the pipe 5 exceeds a set value is mounted on the pipe 5 immediately after a hot water outlet 1c of the valve 1 at this side of a connector of the valve 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides hot water and cold water mixed in-line using a hot and cold water mixing valve to form hot water whose temperature is automatically adjusted. The present invention relates to a hot water supply device configured to supply a large number of hot water supply devices called faucets.

[0002]

2. Description of the Related Art A hot water supply device for supplying hot water whose temperature is controlled by mixing hot water and cold water to various hot water supply devices such as a shower or a hot water tap, mixes hot water and cold water on a hot water supply pipe. A collective type that is equipped with a valve to supply hot water whose temperature is automatically adjusted to a number of water heaters, and a hot and cold water mixing control valve is installed for each water heater to control the temperature of each water heater. There is a unit type (single type) configured to discharge hot water from the hot water supply, and among these hot water supply devices, the collective type is for a washroom of a public facility or a public bath where a large amount of hot water is required. It is widely used as a hot water supply source such as a hot water tap or a shower.

Further, in the hot and cold water mixing valve used in the above-mentioned collective hot water supply device, a plurality of types having different capacity types (for example, as shown in the graph of FIG. 3) from the relationship between the hot water discharge flow rate Q and the differential pressure characteristic ΔΡ are shown. A to D) are prepared in advance, and a structure is prepared in which one having a capacity capable of sufficiently covering the flow range of hot water is selected and used from among these plural types.

That is, as shown in FIG. 4, the hot water and cold water supply pipes 11 and 12 are connected to the hot water inlet 1 of the hot and cold water mixing valve 10.
0a and cold water inlet 10b, and outlet 10c
Shower 14a for hot water supply pipe 13 connected to
In the case of a system in which ~ 14b is connected, if about 20 l / min of hot water is discharged from one shower,
Since the flow rate range is Qmin to Qmax = 20 to 60 liters / minute, a volume type D type hot and cold water mixing valve that can sufficiently cover this flow rate range (Qmin to Qmax) in light of the graph shown in FIG. Select and use, and the number of hot water taps is larger than this and the flow range is, for example, 2
In the case of a large amount such as 00 to 300 liters / minute, the capacity forming machine and the A type hot and cold water mixing valve capable of covering the same are selected according to the graph shown in FIG. 3 and used.

[0005]

As described above, according to the collective hot water supply device, by selecting a hot water mixing valve suitable for the flow range of the hot water, the temperature is adjusted by mixing with the hot water mixing valve to an appropriate temperature. Hot water can be discharged from each water heater.

However, when using all or a large number of hot water supply devices connected to the hot water supply pipe in using each of these hot water supply devices, stable temperature control is performed as designed, and hot water of an appropriate temperature is supplied. Hot water can be discharged from each hot water supply device, but when using a small number of hot water supply devices such as one or two, the flow rate of hot water decreases and the secondary pressure of the hot and cold water mixing valve, that is, the differential pressure of the hot and cold water mixing valve, Since it decreases and is practically out of the left end of each curve of the capacity graph shown in FIG. 3, the temperature control by the hot and cold water mixing valve becomes unstable, and the hot water discharged from the hot water supply equipment becomes hot. It may be too hot or too cold, especially in the case of a collective shower, when using 1 or 2 showers, the back pressure rises sharply, so there is a problem that the above-mentioned inconvenience of temperature control is remarkable. .

Therefore, the technical problem of the present invention is to mix hot water and cold water by the hot and cold water mixing valve and adjust the temperature thereof regardless of the number of the collective hot water supply equipment connected to the secondary side (hot water supply pipe side). , Always in a stable state.

[0008]

[Means for Solving the Problems] Means taken in the present invention for solving the above technical problems are as follows.

Hot water and cold water respectively sent through the water supply pipe are mixed with hot water whose temperature is controlled by using a large capacity large hot water mixing valve, and the hot water is called a collective shower or a collective hot water tap through the hot water supply pipe. In a hot water supply device configured to supply a large number of water heaters,

(1) A relatively small-capacity small-sized device capable of supplying hot water whose temperature is adjusted to one hot water supply apparatus between each hot water and cold water water supply pipe and hot water hot water supply pipe. The hot and cold water mixing valve is connected in parallel to the large hot and cold water mixing valve described above, and is located on the front side of the connection portion of the small hot and cold water mixing valve and on the hot water supply pipe immediately after the outlet of the large hot and cold water mixing valve. , Install a pressure detection type automatic opening / closing valve that closes when the pressure in the hot water supply pipe exceeds the set value and stops hot water supply from the large hot water mixing valve.

[0011]

The means described in (1) above operates as follows.

According to the means described in (1) above, between the hot water and cold water supply pipes and the hot water supply pipe, the hot water whose temperature is adjusted is supplied to a large number of hot water supply devices connected to the hot water supply pipe. A large number of large-capacity hot and cold water mixing valves and a relatively small-capacity small hot and cold water mixing valve that can supply temperature-controlled hot water to one hot water supply device are connected in parallel. During normal use of the hot water supply equipment, hot water and cold water are respectively mixed by these hot and cold water mixing valves, and hot water whose temperature is adjusted to an appropriate temperature can be discharged from each hot water supply equipment, and Even when using one or two of the many water heaters connected to the hot water supply pipe, the automatic open / close valve closes when the rise in pressure of the hot water supply pipe (secondary side) is detected, Stop hot water supply and mix small hot water In order to only allow the hot water supply from,
Even if the flow rate of the hot water decreases, the temperature control is performed in a stable state by the small hot and cold water mixing valve, and even one or two hot water supply devices can discharge hot water whose temperature is adjusted to an appropriate temperature.

As described above, the above-mentioned technical problems can be solved by the above-mentioned means, and the problems of the conventional art can be solved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the hot water supply apparatus according to the present invention described above will be described in detail below with reference to the accompanying drawings.

FIGS. 1 and 2 show an embodiment of a hot water supply apparatus according to the present invention, in which 1 is a large-capacity large-sized hot and cold water mixing valve, and this hot and cold water mixing valve 1 is a hot water supply apparatus to be used. The capacity type that can sufficiently cover the entire flow rate range (Qmin to Qmax) is selected and used from the capacity graph shown in FIG. 3, for example.

Reference numerals 2 and 3 are hot water and cold water supply pipes, and the first water supply ports 2a and 3a of the pipes 2 and 3 are the hot water and cold water receiving ports 1a of the large-scale hot and cold water mixing valve 1. 1b, the large hot and cold water mixing valve 1 mixes hot water and cold water sent through these water supply pipes 2 and 3 to form hot water whose temperature is adjusted, and the hot water is discharged from the hot water outlet. Although it has a mechanism for supplying to the hot water supply pipe 5 side (secondary side) connected to 1c, since the large-scale hot and cold water mixing valve 1 used heretofore is known as it is, description of the internal structure thereof is omitted here. .

Reference numeral 4 is a small hot water / water mixing valve having a relatively small capacity, which is configured to supply hot water whose temperature is adjusted to one or two hot water supply devices. The respective water inlets 4a, 4b of the second water supply ports 2b, 3b of the respective water supply pipes 2, 3 for supplying the hot water and the cold water described above.
Is connected, and hot water and cold water sent through each of these water supply pipes 2 and 3 are mixed to form hot water whose temperature is adjusted, and this hot water is passed through the branch hot water supply pipe 7 connected to the hot water outlet 4c. Although it is structured to supply the hot water to the hot water supply pipe 5, the small hot and cold water mixing valve 4 is a conventionally known one as it is, and the description of the internal structure thereof is omitted.

Reference numeral 6 denotes the secondary side of the large-sized hot / water mixing valve 1 in which the small-sized hot / water mixing valve 4 is connected in parallel as described above, that is, the front side of the connection portion of the branch hot water supply pipe 7 and the large-sized hot / water mixing valve 1 is connected. 2 is a pressure detection type automatic on-off valve mounted on the hot water supply pipe 5 immediately after the hot water supply port 1c of the hot water supply port 1c, and when the pressure in the tip portion 5a of the hot water supply pipe 5 exceeds a set value,
As shown in FIG. 4, the hot water supply from the large hot water mixing valve 4 is closed to stop the supply of hot water.

Further, 8a, 8b, 8c, 8d, 8e, 8
f, 8g, 8h are a large number of collective showers (hot water supply equipment) attached to the pipe 8 connected to the tip 5a of the hot water supply pipe 5, and the capacity type (type) of the large hot water mixing valve 1 described above is Those which can sufficiently cover the flow rate range (Qmin to Qmax) of all of these collective showers 8a to 8h are selected and used, and the capacity type of the small hot and cold water mixing valve 4 described above is one or two showers. Those that can cover the flow rate range of are selected and used.

Further, when all or three or more of the collective showers 8a to 8h are used, the above-mentioned automatic open / close valve 6 is opened as shown in FIG. 1 to make the large and small hot and cold water mixing valves 1 and 4 respectively. It is possible to supply hot water from the
If only one shower 8g is used or if only two showers are used, the hot water supply pipe 5
Since the passage is closed by detecting an increase in the internal pressure, the hot water supply from the large hot water mixing valve 1 is stopped, and only the hot water supply from the small hot water mixing valve 4 is enabled.

Since the hot water supply apparatus according to the present invention has the above-described structure, it is applied to various collective hot water supply devices such as the collective showers 8a to 8h shown in FIGS. 1 and 2 and collective hot water taps. Then, when using all or a large number of hot water supply devices, the hot water whose temperature is adjusted is supplied from the large and small hot and cold water mixing valves 1 and 4 to the tip 5a side of the hot water supply pipe 5, so that each hot water supply device Can be used by tapping hot water of a suitable temperature from the above, and when using one or two hot water supply equipment, the automatic opening / closing valve 6 stops the hot water supply from the large hot water mixing valve 1 by pressure detection, Since only the hot water supplied from the small hot water mixing valve 4 is sent to the hot water supply equipment in use,
With this small hot water mixing valve 4, hot water adjusted to a predetermined temperature can be discharged from the water heater.

[0022]

As described above, according to the hot water supply device of the present invention, the hot water whose temperature is adjusted to a predetermined temperature is always supplied to the collective shower or the collective hot-water tap regardless of the usage. Therefore, it is possible to reliably prevent the problem of temperature change that occurs when one or two showers and hot water taps are used, and especially public facilities requiring a large amount of hot water supply. It is suitable for use as a hot water supply source for bathrooms such as nursing homes and large public baths, and hot water sources such as showers.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram illustrating a state when a hot water supply device according to the present invention is fully used.

FIG. 2 is also an overall configuration diagram illustrating a state when the hot water supply device according to the present invention is partially used.

FIG. 3 is a graph showing the capacity of a large hot water mixing valve for a collective hot water supply device.

FIG. 4 is a configuration diagram showing a conventional hot water supply device using one large hot water mixing valve.

[Explanation of symbols] 1 large hot and cold water mixing valve 1c hot water outlet 2 hot water water supply pipe 3 cold water water supply pipe 4 small hot and cold water mixing valve 5 hot water supply pipe 6 pressure detection type automatic opening and closing valve 7 branch hot water supply pipe 8a-8h collective shower

Claims (1)

[Claims] 1. Hot water and cold water respectively sent through a water supply pipe are mixed with hot water whose temperature is adjusted by using a large-capacity large hot water mixing valve, and the hot water is used as a collective shower or a collective hot water tap through the hot water supply pipe. In a hot water supply device configured to supply a large number of hot water supply devices, the temperature of one hot water supply device is also increased between each hot and cold water supply pipe and the hot water supply pipe. A relatively small capacity small hot water mixing valve configured to be able to supply adjusted hot water is connected in parallel to the large hot water mixing valve described above, and on the front side of the connection portion of the small hot water mixing valve, Moreover, on the hot water supply pipe immediately after the outlet of the large hot water mixing valve,
A hot water supply device equipped with a pressure detection type automatic opening / closing valve that closes when the pressure in the hot water supply pipe exceeds a set value and stops hot water supply from the large hot water mixing valve.