JPH078012Y2 - Bath filtration equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a bath filtration device for filtering hot water in a bathtub to remove dust such as scales and hair.

[Background Art] In the conventional bath filtration device, a filter is provided in the reheating circuit, and the bath heat exchanger and the filter are connected in series.

[Problems to be solved by the invention] Therefore, in the conventional bath filtration device, the bath water passes through the bath heat exchanger during filtration, and the heat in the bath heat is dissipated. There was a problem that the temperature dropped.

Therefore, the present invention has been made in view of the above-mentioned drawbacks of the conventional examples, and an object thereof is to prevent heat radiation from the bath heat exchanger during bath filtration.

[Means for Solving the Problems] Therefore, the bath filtration device of the present invention includes a bath heat exchanger and a pump, a reheating circuit connected to the bath, and a filter. A bypass circuit connected to the reheating circuit in parallel with the flow path provided with the exchanger,
The backwash drainage circuit connected to the bypass circuit so as to branch from the upstream side of the filter of the bypass circuit, and at the time of filtration, the heat exchanger side flow path of the reheating circuit is closed and the bypass circuit is opened to filter. Allow water to pass through the bypass circuit in the forward direction, and at the time of backwashing, open the heat exchanger side flow path of the reheating circuit and close the flow path on the downstream side of the heat exchanger side flow path to create a backwash drainage circuit. Open and further close the downstream side of the bypass circuit during backwashing from the backwash drainage circuit and open the upstream side of the backwashing drainage circuit during backwashing to bypass the backwash water that has passed through the heat exchanger. It is characterized in that it comprises a flow path switching means for causing a reverse flow to be discharged from the backwash drain circuit.

[Operation] In the present invention, however, at the time of filtration, the bath water (filtered water) passes through the bypass circuit from the upstream side of the bath heat exchanger in the reheating circuit, and the heat exchange for bath in the reheating circuit. It flows to the downstream side of the vessel, and dirt and dust such as scales and hair are removed by the filter of the bypass circuit. Therefore, at the time of filtration, the bath water does not pass through the flow path on the bath heat exchanger side that is arranged in parallel with the bypass circuit, and it is possible to prevent the bath water from radiating at the bath heat exchanger at the time of filtration, It is possible to prevent the temperature of the hot water in the bathtub from decreasing.

Further, in the present invention, at the time of backwashing, the bypass circuit is reversely flowed through the flow path of the hot water in the bathtub on the side of the bath heat exchanger,
It is discharged from the backwash drain circuit. Therefore, during this backwashing, the backwash water can be heated to a high temperature by the bath heat exchanger, and by backwashing the filter with high-temperature water, the filter material inside the filter is stuck or solidified. It is possible to dissolve and remove dirt and dust, and it is possible to effectively backwash the filter.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows an automatic bath device equipped with the bath filtration device of the present invention. In FIG. 1, 1 is a bathtub, 2 is a reheating circuit for circulating hot water in the bathtub 1 to reheat it, 3 is a hot water supply circuit for dropping hot water into the bathtub 1, and 3 is a hot water supply circuit. It is connected to the bathtub 1 via a heating circuit 2. The reheating circuit 2 is connected to the bathtub 1, and the reheating circuit 2 includes a pump 5 for forcedly circulating hot water in the bathtub 1, a bath heat exchanger 6 for heating the hot water, and a water level in the bathtub 1. A pressure sensor 7 for detection, a water flow switch 8 used for circulation determination, etc., a thermistor 9 for detecting the temperature of hot water in the bathtub 1 and a thermistor 21 for detecting the temperature of hot water discharged from the bath heat exchanger 6 are provided. Has been. Further, a bypass circuit 23 is provided in parallel with the flow path B provided with the bath heat exchanger 6 and the thermistor 21, and the bypass circuit 23 is provided with a filter 22. The downstream end of the bypass circuit 23 and the reheating circuit 2 are connected by a three-way valve 25, and the upstream end of the bypass circuit 23 and the reheating circuit 2 are directly connected. In addition, the bypass circuit 23
A backwash drain circuit 24 is branched from a location upstream of the filter 22 via a three-way valve 26. The three-way valves 25, 26 constitute a flow path switching means. The hot water supply circuit 3 is connected to the reheating circuit 2 from city water via the hot water supply heat exchanger 10, and the hot water supply branch circuit 11 is branched from the hot water supply circuit 3 downstream of the hot water supply heat exchanger 10. ing. The hot water supply branching circuit 11 is connected to a shower, a currant, or the like, and supplies hot water to these devices. An inlet water flow rate sensor 12 for detecting the inlet water flow rate from city water and a thermistor 13 for detecting the water temperature are provided on the upstream side of the hot water supply heat exchanger 10 in the hot water supply circuit 3, and the hot water supply heat exchanger is provided. Between the hot water supply branch circuit 11 and the hot water supply branch circuit 11, there are provided a flow rate adjusting valve 14 for adjusting the incoming water flow rate, and a thermistor 15 for detecting the hot water supply temperature of the hot water supply heat exchanger 10. Further, on the downstream side of the hot water supply branch circuit 11, a flow rate adjusting valve 16 for controlling the drop flow rate, a drop flow rate sensor 17 for detecting the drop flow rate into the bathtub 1, and a vacuum breaker.
18 、 Open / close valve for dropping the hot water supply circuit 3 19
And a check valve 20 is provided.

Further, as shown in FIG. 2, an overflow weir 27 having an open upper surface is provided around the set water level in the bathtub 1, and the opening edge of the overflow weir 27 is set to be equal to the height of the set water level. ing. A filter 28 for removing large dust such as hair is housed in the overflow weir 27, and a drain port 29 is opened at the bottom of the overflow weir 27, and a reheating circuit is provided in the drain port 29. The upstream ends of 2 are connected. On the other hand, the downstream end of the reheating circuit 2 is connected to the bus adapter 4.

The operation of the above automatic bath device at the time of dropping (hot water supply) will be described. As shown in FIG. 3, the three-way valve 25 is more effective than the bath heat exchanger side flow path B and the bath heat exchanger of the reheating circuit 2. It is controlled so that the downstream side flow path c (hereinafter, referred to as the downstream side flow path) is connected and the bypass circuit 23 side is closed, and the three-way valve 26 connects the filter 22 side and the backwash drainage circuit 24 and connects them. It is controlled to close on the side directly connected to the heating circuit 2. 3 to 5, the direction in which the three-way valves 25 and 26 communicate with each other is shown by a solid line, and the closed direction is shown by a broken line. When the drop opening / closing valve 19 is opened, hot water flows from the hot water supply circuit 3 into the reheating circuit 2 as shown by the solid line arrow in FIG. From the flow path a upstream of the vessel 6 (hereinafter referred to as the upstream flow path) to the bath heat exchanger side flow path b, the downstream side flow path c, and drop from the bath adapter 4 into the bathtub 1. Be done. Therefore, in this case, the hot water does not pass through the filter 22.

Next, the operation at the time of reheating will be described. Also at this time, as in the case of dropping, as shown in FIG. 3, the three-way valve 25 is controlled so that the bath heat exchanger side flow path B and the downstream side flow path C are connected and the bypass circuit 23 side is closed. The three-way valve 26 is controlled so that the filter 22 side and the backwash drainage circuit 24 are communicated with each other and the side directly connected to the reheating circuit 2 is closed. Then, when the pump 5 is operated, hot water is sucked from the bathtub 1 into the reheating circuit 2 as indicated by a dashed arrow in FIG. After passing through the road b, it flows through the downstream side flow path c and returns from the bus adapter 4 into the bathtub 1. Therefore, also in this case, the hot water is filtered by the filter 22.
Do not pass through.

Further, at the time of filtration, as shown in FIG. 4, the three-way valve 25 is controlled so as to connect the bypass circuit 23 and the downstream side flow passage c and close in the direction of the bath heat exchanger side flow passage b, The three-way valve 26 is controlled so that the filter 22 side and the side directly connected to the reheating circuit 2 are communicated with each other, and the three-way valve 26 is controlled to be closed in the direction of the backwash drain circuit 24, and the pump 5 is operated. At this time, as shown in FIG. 2, the water level in the bathtub 1 is 27
If it is higher than the opening edge of, the dust and dirt floating on the surface of the bath will flow into the overflow weir 27 together with the bath water.
Large dust such as hair is removed by the filter 28. Further, the hot water flowing into the overflow weir 27 flows into the reheating circuit 2 to turn on the water flow switch 8. When the water flow switch 8 is turned on, the pump 5 is continuously operated, and hot water flows from the upstream side flow path a through the bypass circuit 23 to the downstream side flow path c as shown in FIG. ,
Return to the bathtub 1 from the bus adapter 4. Then,
The hot water passes through the filter 22 in the bypass circuit 23, and fine dirt such as scales in the bath water is removed. On the other hand, when the water level in the bathtub 1 is lower than the opening edge of the overflow weir 27 by using the bath water, the hot water does not flow into the overflow weir 27, and eventually the air is added to the reheating circuit 2. When the air is sucked, the capacity of the pump 5 becomes extremely low and the water flow switch 8 is turned off. Then, when the water flow switch 8 is turned off, the pump 5 is stopped and the water supply operation is started. That is, the drop opening / closing valve 19 is opened to drop a fixed amount (for example, 20 liters) of hot water into the bathtub 1 from the hot water supply circuit 3, and the water level is raised above the opening edge of the overflow weir 27. When the water replenishment is completed, the pump 5 is operated and the bath water is filtered again as described above. Thus, when filtering,
Since the hot water does not pass through the bath heat exchanger 6, it does not radiate heat in the bath heat exchanger 6 and lower the hot water temperature in the bathtub 1.
Further, when the overflow weir 27 having the above-mentioned structure is used to suck in dirt and dust floating on the surface of the bath water, there is no moving part, so there is no risk of failure and the reliability is high. The water level in 1 can be adjusted within a certain height from the opening edge of the overflow weir 27, and further, the space in the bathtub 1 is not taken up so much.

Next, at the time of backwashing, as shown in FIG. 5, the three-way valve 25 connects the bath heat exchanger side flow path B and the bypass circuit 23 and closes in the direction of the downstream flow path C, and the three-way valve 26 The filter 22 side and the backwash drainage circuit 24 are communicated with each other and the reheating circuit 2 is connected.
The pump 5 is operated by closing the side directly connected to. Therefore, as shown in FIG. 5, the hot water in the bathtub 1 passes from the upstream side flow path a through the bath heat exchanger side flow path b to the bypass circuit.
23 is backflowed and discharged from the backwash drain circuit 24 to a bathroom washing place or the like. At this time, the backwash water flows back through the filter 22,
Dirt adhering to the filter material in the filter 22 is peeled off and washed away by the backwash water, and is discharged together with the backwash water. In addition, at this time, the backwash water is detected by the water flow switch 8 and the burner of the bath heat exchanger 6 is ignited, and the pump 5 is phased so that the temperature of the backwash water becomes high (for example, about 80 ° C.). By controlling and controlling the flow rate and backwashing the filter 22 with high-temperature backwash water, it is possible to effectively carry out the backwash by dissolving the oil and fat and dirt that have stuck to the filter medium.

Although the reheating circuit 2 is connected to the overflow weir 27 of the bathtub 1 and the bus adapter 4 in the above embodiment,
If the overflow weir 27 is not provided, the reheating circuit 2
It is advisable to connect the suction side of the to the bus adapter 4. Further, the suction side of the reheating circuit 2 may be connected to the overflow weir 27 and the bus adapter 4 via a switching valve so that either one can be switched.

FIG. 6 shows another example of the present invention, in which an optimum flow rate is obtained during filtration and backwashing. In this automatic bath device, the reheating circuit 2 connected to the bath adapter 4 of the bathtub 1 is provided with a thermistor 9 for detecting the incoming water temperature, a thermistor 21 for detecting the outgoing hot water temperature, and a flow rate sensor 30. 22 is provided in a bypass circuit 23 which is arranged in parallel with the bath heat exchanger 6. The arrangement of the three-way valves 25, 26 is the same as that in the above-mentioned embodiment. The same components as those in the embodiment shown in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted.

At the time of filtration, the three-way valve 25 is controlled so as to connect the bypass circuit 23 and the downstream side flow path c and close in the direction of the bath heat exchanger side flow path b, and the three-way valve 26 is controlled. The side and the side directly connected to the reheating circuit 2 are communicated with each other, and are controlled so as to close in the direction of the backwash drainage circuit 24,
The pump 5 is operated. And the filtered water bypass circuit
Filter the bath water by passing it through a filter 22 of 24.
At this time, the flow rate of the filtered water is detected by the flow rate sensor 30, and the optimum filtration rate determined in advance by an experiment or the like (normally 10 to 20 m /
The flow rate is controlled by controlling the phase of the pump 5 so that the flow rate of hr is 5 to 10 liters / min when the sectional area is 300 cm ² .

Further, at the time of backwashing, the three-way valve 25 connects the bath heat exchanger side flow path B and the bypass circuit 24 and closes in the direction of the downstream side flow path C, and the three-way valve 26 and the filter 22 side and the backwash drainage. The circuit 5 is connected to the circuit 24 and is closed at the side directly connected to the reheating circuit 2 to operate the pump 5. Therefore, the hot water in the bathtub 1 passes from the upstream flow path a through the bath heat exchanger side flow path b,
It flows back through the bypass circuit 24 and is discharged from the backwash drain circuit 24. At this time, the flow rate of the backwash water is detected by the flow rate sensor 30, and the optimum backwash flow rate determined in advance by experiments etc. (a flow rate that does not cause the filter medium to flow out and does not result in poor cleaning, for example, 15 liters / min) The flow rate of the backwash water is controlled by controlling the phase of the pump 5 so that Also in this case, the backwash water can be effectively backwashed by heating the backwash water in the bath heat exchanger 6 and backwashing it with high-temperature water.

[Advantage of the Invention] According to the present invention, since the bath water does not pass through the bath heat exchanger during filtration, it is possible to prevent the temperature of hot water in the bath from lowering due to heat radiation from the bath heat exchanger during filtration. it can. Also, during backwashing, the backwash water can be heated to a high temperature by the bath heat exchanger, so by backwashing the filter with high-temperature water, the dirt and dust stuck to the filter material inside the filter is effective. Can be removed selectively.

[Brief description of drawings]

FIG. 1 is a block diagram of an automatic bath apparatus according to an embodiment of the present invention, FIG. 2 is a schematic cross-sectional view showing the structure and action of the overflow weir, and FIG. FIG. 4 is an explanatory view showing an operation at the time of heating, FIG. 4 is an explanatory view showing an operation at the time of filtration of the above filtering apparatus, FIG. 5 is an explanatory view showing an operation at the time of backwashing of the above filtering apparatus, and FIG. It is a block diagram of the automatic bath apparatus which concerns on the other example of this invention. 1 …… Bath, 2 Reheating circuit 5 …… Pump, 6 …… Bath heat exchanger 22 …… Filter, 23 …… Bypass circuit 24 …… Backwash drainage circuit 25,26 …… Three-way valve

Claims (1)

[Scope of utility model registration request] 1. A reheating circuit provided with a bath heat exchanger and a pump, provided with a reheating circuit connected to a bathtub, and a filter so as to be in parallel with a flow path provided with the bath heat exchanger. A bypass circuit connected to the bypass circuit, a backwash drain circuit connected to the bypass circuit so as to branch from the upstream side of the filter of the bypass circuit, and a heat exchanger side flow path of the reheating circuit during filtration. When closed, the bypass circuit is opened to allow filtered water to pass through the bypass circuit in the forward direction.When backwashing, the heat exchanger side flow path of the reheating circuit is opened and the flow path downstream of the heat exchanger side flow path is opened. Close, open the backwash drainage circuit, close the downstream side of the bypass circuit during backwashing from the backwash drainage circuit, and open the upstream side of the backwashing drainage circuit during backwash to install the heat exchanger. The backwash water that has passed through is bypassed Bath for filtration device flows were characterized by comprising a flow passage switching means for draining from the backwash drainage circuit.