JPS64496Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the structure of a separation tank provided to separate clean water from bath water in a bathtub with a hot water supply function and an automatic bath water supply function.

[Prior Art] First, Fig. 9 shows a diagram of the operating principle of a bathtub with hot water supply function having an automatic bath water supply function. This appliance is a so-called two-can, two-channel bathtub with hot water supply in which a water heater and a bathtub are housed in one unit, and the hot water supply side is equipped with a burner 24 for burning gas as a heat source, Therefore, the hot water supply heat exchanger 4 that heats water is a main component, and the hot water supply heat exchanger 4
At the exit, it branches into two pipes: a pipe 7 exclusively for bath automatic hot water supply and a general water supply pipe 16 used for supplying hot water to the kitchen, etc.
A water flow sensor 5 and a water shutoff valve 6 are provided in the automatic bath water supply pipe 7. On the other hand, the bath pot consists of a burner 24, a reheating heat exchanger 12, and a bathtub 1.
Pump 11 for forcibly circulating hot water in 5
are the main parts. Furthermore, since this appliance has an automatic hot water supply function for baths, a separation tank 8 with a separate structure is installed downstream of the pipe 7 for automatic bath water supply, and the outlet of the separation tank 8 is connected to the reheating circulation pipe 13. Three-way switching valve 10 provided on the suction side of the pump 11
Connected to one connection port.

Next, these operations will be explained below.

First, when using it as a normal water heater, it is as follows. Issue a command to supply hot water with a remote control (not shown), open the faucets (not shown) in each hot water supply area such as the kitchen, and when water flows into the hot water supply side waterway, the hot water gas solenoid valve 22 opens and the gas flows to the burner. 24 and burns. Water, which is a fluid to be heated, passes through a water supply pipe 2 and is heated by hot water combustion gas in a hot water supply heat exchanger 4.
Hot water is supplied through a general hot water supply pipe 16 from each hot water tap (not shown) in the kitchen or the like.

Next is the case of bath automatic hot water supply. In this case, when a bath automatic hot water supply command is issued with a remote control (not shown), the water stop valve 6 installed in the bath bath automatic hot water supply dedicated pipe 7 opens, and When water flows into the separation tank 8, combustion starts on the hot water supply side, similar to the above-mentioned normal hot water supply, and hot water is supplied into the separation tank 8. On the other hand, reheating circulation piping 1
The three-way switching valve 10 provided in the separation tank 8 is opened on the A and C sides and closed on the B and C sides before the water shutoff valve 6 is opened.
1, hot water is supplied from the bathtub circulation port 14 to the bathtub 15 along the route indicated by the thick arrow shown in FIG. 9, and the bathtub 15 is filled with hot water. Then, when the amount of hot water accumulated by the water amount sensor 5 provided in the pipe 7 for automatic hot water supply for baths reaches a set value set in advance with a remote control, the water stop valve 6 is automatically closed to end the automatic hot water supply for baths.

Finally, when using it as a normal bath pot, when you issue a command to reheat the bath from the remote control (not shown), the three-way switching valve 10 closes on the A and C sides and opens on the B and C sides. The hot water in the bathtub 15 starts circulating by the pump 11, and the reheating gas solenoid valve 2
3 opens, and the burner 24 on the reheating side starts combustion. While the hot water in the bathtub 15 is being circulated by the pump 11, it is heated by the reheating heat exchanger 12 and the hot water is heated in the bathtub 1.
5. Boil the water inside.

FIG. 6 shows a structural diagram of the separation tank 8 shown in the operating principle diagram of FIG. 3. The separation tank 8 is provided at the tip of the suction side of the pump 11 in order to separate clean water and bath water from a sanitary point of view.The upper part is open to receive the clean water, and the lower part is opened from the separation tank 8. A small diameter pipe is provided, and a three-way switching valve 10
connected to. In other words, in the separation tank 8, the hot water injected from the bath automatic hot water supply pipe 7 is sucked by the pump 11, so in order to balance the injection amount and the suction amount, the water level in the separation tank 8 is detected. It is necessary to do so, and one or more water level sensors 9 are installed. This is because electricity is applied between the separation tank 8 and the water level sensor 9, and when the water level sensor 9 comes into contact with water due to a change in the water level in the separation tank 8, the water level in the separation tank 8 becomes energized. It detects that it is located at a position higher than sensor 9.

[Problem that the invention attempts to solve]

FIGS. 7 and 8 schematically show the internal state of the separation tank 8 when the conventional separation tank shown in FIG. 6 is used for automatic bath water supply. During automatic hot water supply, hot water accumulates in the separation tank 8 at a certain water level, and FIG. 7 shows the case when the water level is low, and FIG. 8 shows the case when the water level is high. Since the hot water injected from the bath automatic hot water supply pipe 7 falls directly onto the water surface, many air bubbles are mixed into the hot water accumulated in the separation tank 8, as shown in FIGS. 7 and 8. If the separation tank 8 is made larger, these bubbles will float to the surface due to buoyancy, but if you try to downsize the bathtub with hot water supply while keeping the separation tank 8 built-in, the separation tank 8 will also have to be made smaller. In this case, many air bubbles are mixed into the hot water sucked by the pump 11. i.e. pump 1
No. 1 had the problem that it moved with air bubbles mixed in, which increased the noise and reduced its performance. In one example, if there is no air bubbles, 8
If air bubbles are mixed into a product that has a discharge capacity of 5/min, it will drop to about 5/min, based on simple calculations.
When automatically supplying hot water to a 180 bathtub, if the capacity of the pump 11 does not decrease, it will take 180 ÷ 8/min, but if air bubbles are mixed in and the capacity of the pump 11 decreases, it will take 180 ÷ 5/min ≒ 36 min. This makes it difficult for the user to use the device. In addition, the hot water injected from the automatic bath pipe 7 is transferred to a separation tank 8.
Since the water falls directly onto the water surface in the separation tank 8, the water scatters and tends to adhere to the water level sensor 9 provided to detect the water level in the separation tank 8, causing a problem of erroneous water level detection. Ta. In addition, in order to avoid the problems of increased pump noise, decreased pump capacity, and erroneous water level detection, it is necessary to increase the size of the separation tank 8, and it is necessary to downsize the body of the bathtub with hot water supply. The problem was that I couldn't do it.

[Means for solving problems]

A separation tank structure of the present invention for solving the above problems is shown in FIG. In this structure, a water flow guide plate 31 with a certain inclination is installed above the water level sensor 9 to guide the hot water injected from the bath automatic hot water supply pipe 7 toward the wall of the separation tank 8 on the opposite side of the water level sensor 9. , on the lower side of the water level sensor 9, the water flow guide plate 31 receives the water flow flowing down the wall, the flow is directed horizontally, and then flows out from the water level sensor 9 side to the outlet of the separation tank 8. Further, a water level sensor 9 is provided below the water level sensor 9 and above the air water separating plate 32.
A malfunction prevention plate 33 is provided which is closed on one side and open on the opposite side from the water level sensor 9.

[Examples and effects]

With the separation tank structure of the present invention, as shown in FIGS. 2 and 3, it is possible to prevent air bubbles from entering the pump 11, and also to prevent the water level sensor 9 from malfunctioning due to air bubbles. 2 shows a case where the water level in the separation tank 8 is low, and FIG. 3 shows a case where the water level is high. Hot water injected from the bath automatic hot water supply pipe 7 is first received by the water flow guide plate 31 and guided toward the wall opposite to the water level sensor 9, so malfunctions due to water splashing on the water level sensor 9, etc. Moreover, since the flow after the water flow guide plate 31 is along the wall, the falling speed of the water is reduced, and the mixing of air bubbles into the hot water accumulated in the separation tank 8 is reduced, and the hot water is The depth at which the air bubbles are mixed in becomes shallower, making it easier for the air bubbles to rise.
Furthermore, a steam/water separation plate 32 provided at the bottom of the separation tank 8
Now, we will stop the flow of water along the wall, so
The bubbles will float upwards. Therefore, even if the separation tank 8 is downsized, air bubbles are not included in the hot water sucked by the pump 11, and it is possible to prevent a decrease in the performance of the pump 11 and generation of noise in the pump 11 due to the inclusion of air bubbles. In addition, the malfunction prevention plate 33
This prevents air bubbles floating upward on the air/water separation plate 32 from touching the water level sensor 9 and causing malfunction, and also prevents water droplets scattered on the air/water separation plate 32 from hitting the water level sensor 9. In particular, the water level sensor 9 This is effective when a sufficient distance between the air and water separation plate 32 cannot be maintained. Furthermore, FIG. 4 shows an embodiment in which the malfunction prevention plate 33 is L-shaped and stands up on the opening side. This prevents the hot water that has fallen along the wall by the water flow guide plate 31 from splashing when it is stopped by the steam/water separating plate 32 to prevent the hot water from hitting the water level sensor 9. It is. Moreover, since it is set up in an L-shape, a notch 34 for draining water is provided in the horizontal part as shown in FIG. 5 to follow the rise and fall of the water level in the separation tank 8. Although FIGS. 1 to 5 show the case where there are two water level sensors 9, the same applies not only to the case where there is one but also to the case where there are three or more.

[Effect of idea]

With the conventional separation tank structure, air bubbles easily get mixed into the hot water injected into the separation tank during automatic hot water supply for baths, and the air bubbles are difficult to float to the surface, resulting in air bubbles getting mixed into the hot water sucked by the pump. The pump noise increases and the pump capacity decreases.
Automatic bath water supply took a long time and was inconvenient to use, and when water was injected into the separation tank, it fell directly into the hot water that had accumulated in the separation tank, making it easy for the water to scatter and hit the water level sensor. The floating air bubbles easily touch the water level sensor, and the water level sensor is also prone to malfunction, resulting in low reliability. In addition, in order to prevent these problems from occurring, it is necessary to increase the size of the separation tank and the main body of the device. With this invention, even if the separation tank is made smaller,
There are few air bubbles mixed in in the separation tank, and the bubbles that are generated tend to float to the surface, so the hot water sucked by the pump does not contain air bubbles, so there is no pump noise caused by air mixing, and there is no reduction in pump performance. In addition, since hot water is slowly poured into the separation tank, there is no fear that the water level sensor will malfunction due to water scattering or floating air bubbles, and reliability can be improved.

[Brief explanation of the drawing]

Figure 1 is a structural diagram of a separation tank according to the present invention, Figures 2 and 3 are schematic diagrams of the internal state when the separation tank of Figure 1 is used, and Figure 4 is another embodiment of the present invention. Separation tank structure diagram, Figure 5 is a sectional view taken along line A-A in Figure 4, Figure 6 is a conventional separation tank structure diagram, and Figures 7 and 8 are internal views when using the separation tank in Figure 6. Fig. 9 is a diagram showing the operating principle of a bathtub with hot water supply function that uses a separation tank and has an automatic hot water supply function. 1... Bath pot with hot water supply, 8... Separation tank, 9...
...Water level sensor, 11...Pump, 15...Bathtub,
31...Water flow guide plate, 32...Air/water separation plate, 33
...Malfunction prevention plate.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A bathtub with hot water supply function that uses a pump to supply hot water to the bathtub with an automatic hot water supply function, and a separation tank that separates clean water from bathtub water is provided on the pump suction side, A water level sensor is attached to the separation tank, and a water flow guide plate with an opening and an inclination that allows hot water to fall to the side opposite to the side where the water level sensor is installed is installed at the top of the water level sensor, and a water flow guide plate with an opening on the side where the water level sensor is installed is installed at the bottom of the water level sensor. A separation tank for a bathtub with hot water supply, characterized in that a separation plate is provided, and a malfunction prevention plate is provided above the air/water separation plate and below the water level sensor and opened on the side opposite to the water level sensor mounting side. 2. The separation tank according to claim 1 of the utility model registration, characterized in that the opening side of the malfunction prevention plate is raised up in an L-shape, and an opening for draining water is provided in the horizontal part of the opening side.