JPH0142758Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in an instantaneous heating type heat exchange device used in a private parts cleaning device that squirts warm water into a private part such as the anus, or an electric water heater.

Conventionally, instant heating type heat exchange equipment used in this type of equipment can be used continuously even if the volume is small, and has the advantage of having little heat loss. It also had some drawbacks.

That is, in the conventional heat exchange device, for example, as shown in FIG. The water was made to make a U turn from the other end, passed between the inner circumferential wall of the tank 2 and the heater 1, and was heated while flowing out from the water outlet 3 opened at the upper end of the tank 2. However, with the structure of the heat exchange device, as is clear from the temperature distribution diagram shown in FIG. The water flowing through the tank 2 was not heated very much, and there were local temperature differences within the tank 2, making it difficult to use it efficiently. or,
Inside the water outlet 3, the temperature of the hot water flowing out from the water outlet 3 is detected, and when this temperature becomes lower or higher than the required set temperature, the heater 1 is turned on or off to adjust the temperature of the hot water. A temperature detection sensor 4 is installed to keep the temperature constant. However, as shown in Figure 1, this temperature detection sensor is installed directly above tank 2 and relatively close to the heater, so when heater 1 is energized, the water near heater 1 heats up rapidly. The water exceeds the set temperature and flows out to the water outlet 3, immediately activating the temperature detection sensor 4 and stopping the power supply to the heater 1.
Further, when hot water having a temperature lower than the set temperature flows out to the water outlet 3, the temperature detection sensor 4 is activated again and the heater 1 is energized. In other words, hot water having a temperature higher than or lower than the set temperature alternately flows out from the water outlet 3. For this reason, when the heat exchange device is used, for example, in a private parts cleaning device, hot water with a temperature difference is sprayed to the private parts of the user.
This sometimes caused discomfort to the user. As a result of experiments, this temperature difference is approximately 10°C (33 to 43°C) when the set temperature is 38°C.
℃) was also hot. In this case, even if the temperature detection sensor is set at a position away from the water outlet 3, it takes time for the temperature detection sensor to detect the temperature of the hot water flowing out from the water outlet 3, and the temperature difference still remains. The point that a certain hot water is spouted from the nozzle of the private part washing device is similar to the above, and in addition, a temperature regulator 5 is installed in the tank 2 in the vicinity of the heater 1 to detect abnormal overheating of the heater 1. The operation start temperature of this temperature regulator 5 is set approximately 10° C. higher than that of the temperature detection sensor 4. However, as described above, when the temperature detection sensor 4 is placed away from the water outlet 3, when the heater 1 is energized, the water temperature on the surface of the heater 1 rises rapidly, and the temperature regulator 5 There was a risk that the heater 1 would be detected first and the heater 1 would be shut off. (The reason why the temperature regulator 5 is set close to the set temperature of the temperature detection sensor 4 is to protect the user from being burned by boiling water.) For this reason,
Usually, an auxiliary tank (not shown) is located at the outlet of water outlet 3.
A temperature detection sensor 4 is inserted into the water outlet 3 so that hot water above the set temperature and hot water below the set temperature are mixed at an appropriate temperature in this auxiliary tank and fed to the nozzle of the private part cleaning device. An instant heating type heat exchange device was used, but this structure required a separate auxiliary tank, which resulted in an increase in the size of the instant heating device and increased manufacturing costs.

The present invention eliminates the above-mentioned drawbacks, minimizes local temperature differences within the tank, and enables efficient use of the heat exchange device.
The heat exchange device has a simple structure and can be manufactured economically.The following is an example of implementing the present invention in an instantaneous heating type heat exchange device for a private parts cleaning device as shown in FIGS. 3 to 7. To explain, 11 is a tank of a heat exchanger, and as shown in FIG. 3, this tank 11 is circular in shape, with only the flange 12a on the periphery pushed out a little upwards so that the longitudinal section is almost U-shaped. a bottom plate 12; and the bottom plate 12.
The flange 13 has a flange 13a similar to the flange 13a, and has a conical flange 13 in which U-shaped fitting portions 13b are formed at four equal intervals on the flange 13a. Reference numeral 14 denotes a heater housed and installed in the tank 11, and is formed by printing a heating element a such as tungsten or molybdenum on the surface of a disc-shaped ceramic made of alumina or the like, and then coating the heater with ceramic. This heater 14 is a so-called ceramic heater, and a support arm b is provided on the outer periphery of the heater 14 at a position that fits into the fitting hole 13b of the housing 13.
are integrally protruded in four directions. When installing the heater 14, first, a sealing material 15 with excellent heat resistance and airtightness, such as a packing made by compression molding asbestos under high pressure or silicone, is placed on the flange 12a of the bottom plate 12, and then , the support arm b of the heater 14 on the disk is placed on the sealing material 15, and the heater 14 is placed on the sealing material 15.
is mounted on the bottom plate 12 in close proximity to its bottom surface. Therefore, as shown in FIG. 4, the support arm b
A void portion S is formed except for that portion. Continuing,
After placing a sealing material 15' of the same quality on the sealing material 15 across the supporting arm b, the supporting arm b of the heater 14 is fitted into the fitting part 13b provided on the flange 13a of the housing 13. It is placed on the bottom plate 12. Thereafter, the flange 13a of the housing 13 and the flange 12a of the bottom plate 12 are firmly fastened with the tightening bolts 16, as shown in FIGS. 3 and 4. Therefore, the support arm b of the heater 14 is fitted into the fitting part 13b of the housing 13, and is further tightened with the tightening bolt 16, so that it can be moved into the tank 11 close to the bottom plate 12. Moreover, by inserting sealing materials 15 and 15' between the housing 13 and the bottom plate 12, the tank 11 can be attached without damaging its watertight structure. Note that if the sealing material 15, 15' is insufficiently sealed, fill the gap between the flanges 13a, 12a with heat-resistant adhesive and close the flanges 13a, 12.
The airtightness of a may be strengthened. Reference numeral 17 indicates a required number of water holes formed in the heater 14, and reference numeral 18 indicates a water inlet opened in the center of the bottom plate 12. A water supply pipe 19 is connected to the water inlet 18. Reference numeral 20 denotes a water outlet opening at the top of the housing 13, and a mounting tube 22 housing a temperature detection sensor 21 is erected upward from the water outlet 20. The temperature detection sensor 21 senses the temperature of the hot water flowing into the water outlet 20, and controls the amount of heat generated by increasing or decreasing the current flowing to the heater 14 via a separately provided controller (not shown). 23 is a terminal of the heater 14, and 24 is a temperature regulator for preventing overheating of the heater 14.

Next, the operation of the heat exchange device of the present invention will be explained.

The water temperature in tank 11 is suitable for constant use (approximately 38°)
hot water is stored. If you need hot water to clean your anus, turn on a switch (not shown) to open the solenoid valve, and tap water will flow from the water supply pipe 19 through the water inlet 18 to the tank 11.
At the same time, the hot water in the tank 11 is fed from the discharge port 20 through the mounting tube 22 to a nozzle of a private parts cleaning device (not shown), and is discharged from this nozzle toward the private part. Then, water that newly flows into the tank 11 due to the outflow of the hot water in the tank 11 is transferred to the bottom plate 12 and the heater 14.
A part of the water flows in a radial direction while being heated by the heater 14, and a part of the water passes through the water passage hole 17 and rises to the surface of the heater 14, and the remaining water is heated by the heater 14 and flows in the radial direction. Similarly to the above, it rises to the surface of the heater 14 from the gap S formed between the peripheral edge of the bottom plate 12 and the inner circumferential surface of the bottom plate 12. In this way, the water that flows into the tank 11 from the water inlet 18 is immediately heated by the heater 14 and rises to the surface of the heater 14 through the water passage hole 17 and the gap, and has already been heated on the heater 14. The water rises in the tank 1 together with the hot water, that is, in a mixed state, and flows into the mounting tube 22 from the water outlet 20. At this time, the water flowing from the water supply pipe 19 onto the bottom plate 12 is heated to some extent while rising to the surface of the heater 14 through the water passage hole 17 and the gap S, but the temperature is not present on the surface of the heater 14. However, when the hot water rises to the surface of the heater 14 from the water passage holes 17 etc., some of it flows to the surface of the heater 14, but most of it continues to rise and has already heated up. The hot water, which has a high temperature on the surface of the heater 14, is drawn in and mixed with this hot water and moves upwards in the tank 11, so the temperature of the hot water when it flows out from the water outlet 20 is a temperature suitable for cleaning. As a result, it is fed to the mounting tube 22. For this reason, the temperature detection sensor 21 hardly operates because hot water close to the appropriate temperature flows out from the water outlet 20. This is clear from the temperature distribution diagram shown in FIG. 6, which schematically shows the state of water heating.
Although there is a slight decrease in temperature near the area, there is no significant difference in temperature from the hot water temperature on the surface of the heater 14. Therefore, while rising in the tank 11, the hot water whose temperature is not very high and the hot water whose temperature is slightly high on the surface of the heater 14 are appropriately mixed and sent out.
In addition, since there is little water circulation in the center of the surface of the heater 14, relatively high-temperature hot water flows through the water outlet 20.
However, this hot water passes through the gap S and reaches the conical housing 1.
The relatively low-temperature hot water flowing in the tank 1 along the slope 3 is mixed near the bottom of the water outlet 20 and then flows out from the water outlet 20, so that hot water higher than the set temperature flows through the water outlet 20. It will not be leaked further. The hot water in the tank 11 is released when the water supply from the water supply pipe 19 is stopped (i.e., when hot water is not used)
The temperature detection sensor 21 turns on and off the heater 14 at appropriate times to maintain an appropriate temperature.

Incidentally, the heater 14 may have a rectangular shape instead of a disk shape.
4, the support arm b is attached to the housing 13 and the bottom plate 12.
The present invention can also be achieved by providing leg portions on the bottom plate 12 and fixing the bottom plate 12 without sandwiching the bottom plate 12 between the flanges 13a and 12a.

Furthermore, although the present invention has been described with reference to an example in which it is applied to a private parts cleaning device, the present invention is not limited to this, and can also be applied to instantaneous heating type electric water heaters, etc. by changing the set temperature of the temperature detection sensor. can.

Since the present invention is configured as described above, it has the following effects.

(1) A plate-shaped heater 14 is mounted on the bottom plate 12 in close proximity to the bottom plate 12 so that water flows into the tank 11 from the bottom side of the bottom plate 12 toward the back surface of the plate-shaped heater 14. Because the cold water is heated to a certain extent below the heater 14, it rises in the tank 11, and when this rises, it is mixed with the already heated hot water on the surface of the heater 14 and flows into the tank. As it rises in tank 1, it reaches an appropriate temperature and flows out.
1, there are almost no local temperature differences, and the heat exchange device can be used efficiently.

(2) In addition, the plate-shaped heater 14 is provided with an appropriate number of water holes 17 on the bottom plate 12 of the tank 11.
Since the tank 11 is installed with a gap S formed between the heater 14 and the inner circumferential surface of the heater 14, water flowing into the tank 11 passes through these water passage holes 17 and the gap S and rises to the surface of the heater 14. Although the temperature of the hot water on the surface of the heater 14 is somewhat lower than that of the hot water on the surface of the heater 14, since the housing is formed into a conical shape, the water gradually collects below the outlet 20, and the temperature rising from the surface of the heater 14 is relatively lower. Since the high-temperature water is mixed with the high-temperature water and discharged from the water outlet 20, there is no need to install an auxiliary tank to mix the hot water above the set temperature with the hot water below the set temperature, as is the case in the past. It has a simple structure and can be manufactured at low cost without increasing its size.

(3) Furthermore, since hot water at an appropriate temperature flows out from the water outlet 20 as described above, the temperature of the hot water can be easily controlled, and as a result, changes in the discharge water temperature due to changes in the inlet water temperature and changes in the amount of water can be prevented. It can be reduced.

(4) In addition, the heat exchange device of this proposal has a plate-shaped heater 1
4 is placed close to the bottom plate 12 of the tank 11,
The upper part of this heater 14 is surrounded by a conical housing 13 to form an almost funnel-shaped space above the heater 14, and this space allows the flow of water from the bottom of the tank 11 to the bottom of the heater 14. Hot water heated on the side and heater 1
4. Since water at the appropriate temperature can be obtained by mixing with hot water heated on the surface, unlike conventional methods, hot water with a difference in temperature will not be discharged, and the temperature controller will detect the temperature to prevent the heater from rising too high. The disadvantage of operating before the sensor and making it difficult to use the heat exchange device can also be overcome.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal section showing an example of a conventional instant heating type heat exchange device, Fig. 2 is an explanatory diagram of temperature distribution during heating of water in the conventional device, and Fig. 3 is an instant heating type heat exchange device of the present invention. FIG. 4 is a cross-sectional view taken along line A-A in FIG. 3, FIG. 5 is a cross-sectional view taken along line B-B in FIG. 4, and FIG. It is an explanatory view of temperature distribution in . 11...Tank, 12...Bottom plate, 13...Housing, 14...Heater, 17...Water hole, 1
8...Water inlet, 20...Water outlet, S...Gap.

Claims (1)

[Scope of utility model registration request] A plate-shaped heater having a required number of water holes perforated on a bottom plate with a water inlet opening downward is placed close to the bottom plate, and the periphery of the heater and the inner circumferential surface of the bottom plate facing the heater periphery are arranged close to the bottom plate. an instant heating type heat exchange device, which is mounted with a gap formed between the bottom plate and a conical housing having a water outlet at the top and fixed in a watertight structure above the bottom plate.