JP2016090214A - Hot water filling control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology capable of easily draining water from a hot water filling control device.SOLUTION: Check valves 104, 105 that are opened when pressure of hot water on a water heater side reaches predetermined pressure or higher are arranged in a hot water supply passage for connecting the water heater with a bathtub. A filter 101 for removing foreign matters is installed on the water heater side of the check valves. An atmosphere release valve 106 that is opened when pressure of clean water supplied to the water heater decreases is connected to the bathtub side of the check valves. A heater 107 is disposed between the check valves and the filter, and when water is drained, a temperature of hot water between the check valves and the filter is increased. Due to this configuration, when the hot water is heated and expanded, the pressure between the check valves and the filter increases, and when the pressure exceeds predetermined pressure, the check valves open. Then, this enables inflow of air, so that the atmospheric pressure is applied to the hot water from the check valve side. In this state, since the weight of the hot water cannot be supported only by the surface tension of water generated in the filter, the hot water is discharged through the filter.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a system for filling a bathtub from a hot water supply device through a hot water control device, and more particularly to a technique for draining water from the hot water control device when draining the hot water supply device.

  In a system that fills a bathtub using hot water generated by a hot water supply device, a hot water control device is provided between the hot water supply device and the bathtub, and the hot water is filled in the bathtub via the hot water control device. ing. This hot water controller is composed of various parts such as a solenoid valve, a flow sensor, a filter, and a check valve, and each part has the following functions.

  First, the solenoid valve is provided in a hot water supply passage for supplying hot water from the hot water supply device to the bathtub, and opens and closes the hot water supply passage. The flow rate sensor is provided on the upstream side (hot water supply device side) of the solenoid valve, and detects the flow rate of hot water passing through the hot water supply passage. Further, a fine filter is provided on the upstream side of the flow rate sensor to remove small foreign matters mixed in hot water from the hot water supply apparatus. For this reason, it is possible to prevent a situation in which the flow rate sensor or the electromagnetic valve does not operate normally due to foreign matter. On the other hand, a check valve is provided on the downstream side (tub side) of the electromagnetic valve. For this reason, even when the supply pressure of hot water to the hot water supply device is reduced due to water outage and the pressure of hot water supplied from the hot water supply device is reduced, the sewage in the bathtub passes through the hot water supply passage to the hot water supply side. Backflow can be prevented.

  In addition, in such a hot water control device, it has been proposed to provide an air release valve on the downstream side of the check valve that opens when the supply pressure of clean water decreases (Patent Document 1). The open air release valve discharges hot water downstream of the check valve, and instead air is sucked in, so even if the check valve is not fully closed for some reason, It is possible to prevent sewage from flowing back to the hot water supply device side.

JP 2003-254604 A

  However, in the hot water control apparatus having the above-described structure, water tends to remain between the check valve and the filter when draining to prevent freezing in winter, and it is difficult to drain water. was there. This is due to the following reason. First, when draining water, even if the solenoid valve is opened, the check valve is closed, and atmospheric pressure does not act on the water from the check valve side. Also, if water on the upstream side (hot water supply device side) from the filter escapes, atmospheric pressure acts on the water from the upstream side of the filter, and the surface tension of the water is generated with fine eyes of the filter, making it difficult for air to pass through. . For this reason, even if water tries to flow out from the filter side between the check valve and the filter, a negative pressure is generated because there is no air to be replaced, and this negative pressure and the surface tension of the water generated in the filter The weight of water is supported by the atmospheric pressure acting from the upstream side of the filter. As a result, even if the upstream side of the filter is drained, water remains confined between the check valve and the filter.

  The present invention has been made in response to the above-described problems in the prior art, and an object thereof is to provide a technique capable of easily draining water from a hot water control apparatus.

In order to solve the above-described problems, the hot water controller of the present invention employs the following configuration. That is,
Provided in a hot water supply passage for supplying hot water from the hot water supply device to the bathtub, and when the hot water pressure on the hot water supply side becomes equal to or higher than a predetermined pressure, the valve is opened to pass hot water and the hot water pressure on the hot water supply side A check valve that closes when the pressure becomes less than the predetermined pressure and prevents the back flow of hot water, and hot water supplied from the hot water supply device provided in the hot water supply passage on the hot water supply side of the check valve. A hot water tension control device comprising: a filter that removes foreign matter from the water, and an air release valve that opens when the pressure of clean water supplied to the hot water supply device decreases and discharges hot water on the bathtub side from the check valve In
A heater is provided between the check valve and the filter that operates for a predetermined time when the hot water controller is drained to raise the temperature of hot water between the check valve and the filter. It is characterized by that.

  In such a hot water control device of the present invention, the supply of clean water to the hot water supply device is stopped when water is drained, so that the air release valve is opened, so that hot water is discharged on the bathtub side of the check valve. Has been replaced by air. Then, the hot water between the check valve and the filter is heated and expanded by the operation of the heater, so that the pressure between the check valve and the filter increases. When the pressure is applied to the check valve and exceeds a predetermined pressure, the check valve is opened. Then, inflow of air becomes possible, and atmospheric pressure acts on hot water from the check valve side. In this state, the surface tension of the water generated by the filter alone cannot support the weight of the hot water, so the hot water between the check valve and the filter passes through the filter and is discharged. As a result, water can be easily drained from the hot water controller.

  Further, in the hot water control apparatus of the present invention, water can be drained by the following operation even when the check valve is not opened. First, when the pressure between the check valve and the filter rises due to the operation of the heater, the pressure is applied not only to the check valve but also to the filter, and even if the check valve does not open, The pressure is released as the hot water oozes out. Thereafter, when the heater is stopped, the hot water between the check valve and the filter contracts as it gradually cools. Then, a large negative pressure is generated between the check valve and the filter due to the seepage of hot water from the filter, so that air breaks the surface tension of the water generated by the filter. Get in. Thus, once the surface of the water is broken by the filter, the air easily passes through the filter, so that the air to be replaced can enter the filter to discharge hot water between the check valve and the filter. .

  Further, in the hot water control apparatus of the present invention described above, the check valve is operated by operating the heater even when the hot water supply from the hot water supply apparatus to the bathtub is not performed for a predetermined period of time without draining. You may make it raise the temperature of the hot water between filters.

  In this way, the hot water between the check valve and the filter can be sterilized by heating to suppress the growth of bacteria, so even if hot water filling is not performed for a long time, It is possible to prevent the occurrence of slime.

It is explanatory drawing which showed the whole structure of the hot water system 1 of an Example. It is explanatory drawing which showed the internal structure of the hot water control apparatus 100 of a present Example. It is sectional drawing which showed the internal structure of the solenoid valve 103 and the 1st check valve 104 of a present Example. It is explanatory drawing which showed a mode that water was drained from the hot water control apparatus 100, without operating the heater 107. FIG. It is a flowchart which shows the heater control process which the controller 50 performs. It is explanatory drawing which showed the expansion | swelling amount of the water by temperature rising. It is explanatory drawing which showed a mode that the heater 107 was operated and water was drained from the hot water control apparatus 100. FIG.

  FIG. 1 is an explanatory diagram showing an overall configuration of a hot water system 1 including a hot water control device 100 of the present embodiment. As shown in the figure, a hot water supply system 1 includes a hot water supply device 10 that generates hot water, a bathtub 2 that stores hot water, a hot water supply pipe 20 that supplies hot water from the hot water supply device 10 to the bathtub 2, and a hot water supply pipe 20. The hot water controller 100 is provided. In this embodiment, the hot water supply pipe 20 corresponds to the “hot water supply passage” in the present invention.

  The hot water supply apparatus 10 includes a burner 11 that burns fuel gas supplied through the gas pipe 5, a combustion fan 12 that supplies combustion air toward the burner 11, and combustion exhaust gas generated by combustion in the burner 11. And a heat exchanger 13 for exchanging heat. Hot water is supplied to the heat exchanger 13 through the water supply pipe 4, and the supplied water is heated by heat exchange with the combustion exhaust gas in the heat exchanger 13 and then becomes hot water to the hot water supply pipe 20. And leaked. In the middle of the water supply pipe 4 connected to the heat exchanger 13, a water drain plug 3 for draining water from the hot water supply device 10 is provided. Further, the water supply pipe 4 upstream of the water drain plug 3 is provided with a main plug (not shown) for opening and closing the water supply pipe 4.

  The hot water supply pipe 20 connected to the downstream side of the heat exchanger 13 is branched into two in front of the hot water controller 100, one is connected to the hot water controller 100, and the other is a water drain plug 7 in the middle of the path. Is connected to a curran 8 equipped with In addition, a hot water pressure pipe 6 branched from the water supply pipe 4 is also connected to the hot water controller 100. Furthermore, the hot water controller 100 is electrically connected to a controller 50 that controls the hot water system 1.

  FIG. 2 is an explanatory diagram showing the internal structure of the hot water controller 100 of this embodiment. As shown in the drawing, the hot water control device 100 of this embodiment includes an electromagnetic valve 103, a flow rate sensor 102, a filter 101, and two check valves (a first check valve 104 and a second check valve 105). And an air release valve 106 and a heater 107.

  The solenoid valve 103 is controlled to be opened and closed by the controller 50 and opens and closes the hot water supply pipe 20. Note that a pilot-type solenoid valve is used as the solenoid valve 103 of the present embodiment, and the structure thereof will be described later with reference to another drawing. The flow rate sensor 102 is provided on the upstream side (hot water supply device 10 side) of the solenoid valve 103 and detects the flow rate of hot water passing through the hot water supply pipe 20. The flow rate sensor 102 of the present embodiment incorporates an impeller that rotates according to the flow of hot water in the hot water supply pipe 20, and detects the flow rate of hot water based on the rotational speed of the impeller and outputs it to the controller 50. The fine filter 101 is provided on the upstream side of the flow rate sensor 102 and removes small foreign matters mixed in the hot water from the hot water supply apparatus 10. For this reason, it is possible to prevent a situation in which the flow sensor 102 or the electromagnetic valve 103 does not operate normally due to a foreign matter being caught.

  The first check valve 104 and the second check valve 105 are provided in series on the downstream side (tub 2 side) of the electromagnetic valve 103 and prevent back flow of hot water from the bathtub 2 side to the hot water supply device 10 side. . The structure of the check valves 104 and 105 will be described later with reference to another drawing. Further, the atmosphere release valve 106 connected between the first check valve 104 and the second check valve 105 is connected to the primary chamber 106a by a valve body 106c supported by a diaphragm, similarly to a known atmosphere release valve. The structure is partitioned from the secondary chamber 106b. Clean water is guided to the primary chamber 106 a of the air release valve 106 through the clean water pressure pipe 6. On the other hand, hot water between the first check valve 104 and the second check valve 105 is guided to the secondary chamber 106b of the air release valve 106, and a spring that biases the valve body 106c toward the primary chamber 106a. 106d is provided. Normally, the pressure of clean water is higher than that of hot water supplied to the downstream side of the first check valve 104 via the hot water supply device 10, so that the valve body 106c resists the biasing force of the spring 106d. As a result of being pushed into the next chamber 106b, the air release valve 106 is closed. However, when the pressure of the water supply decreases due to water interruption or the like, the valve body 106c is pushed back to the primary chamber 106a side by the biasing force of the spring 106d, and the air release valve 106 is opened. As a result, hot water between the first check valve 104 and the second check valve 105 is discharged, and air is sucked in instead.

  The heater 107 is provided between the flow sensor 102 and the electromagnetic valve 103 and increases the temperature of hot water between the flow sensor 102 and the electromagnetic valve 103. The position where the heater 107 is provided is not limited to between the flow sensor 102 and the electromagnetic valve 103, and may be between the filter 101 and the first check valve 104. In addition, the heater 107 of this embodiment is attached to the outside of the hot water supply pipe 20 and raises the temperature of hot water indirectly from the outside, but the heater 107 is installed inside the hot water supply pipe 20 to directly supply hot water. The temperature may be increased.

  FIG. 3 is a cross-sectional view showing the internal structure of the solenoid valve 103 and the first check valve 104 of the present embodiment. The structure of the second check valve 105 is basically the same as that of the first check valve 104. FIG. 3A shows a state where both the electromagnetic valve 103 and the first check valve 104 are closed. First, in the solenoid valve 103, an inflow chamber 120 into which hot water that has passed through the flow sensor 102 flows and an outflow passage 121 that guides the hot water to the first check valve 104 are partitioned by a cylindrical partition wall 122. It has a double pipe structure in which an outflow passage 121 is formed inside the chamber 120. A diaphragm valve 123 supported by a diaphragm is provided so as to cover the end of the partition wall 122.

  A back pressure chamber 124 is formed on the opposite side of the diaphragm valve 123 from the inflow chamber 120 and the outflow passage 121, and a small-diameter connection passage 125 that connects the back pressure chamber 124 and the outflow passage 121 is provided. Yes. Further, an orifice passage 126 having a diameter smaller than that of the connection passage 125 is provided through the diaphragm valve 123, and the inflow chamber 120 and the back pressure chamber 124 are communicated with each other through the orifice passage 126.

  The electromagnetic valve 103 is provided with an actuator 127 for opening and closing the connection passage 125. The actuator 127 includes an electromagnetic coil 128 formed in a cylindrical shape by winding an electric wire, a movable iron core 129 slidably provided in the central axis of the electromagnetic coil 128, and the like. In a state where the electromagnetic coil 128 is not energized, as shown in FIG. 3A, the distal end portion of the movable iron core 129 is inserted in the connection passage 125, and the connection passage 125 is blocked.

  Since the hot water flowing into the inflow chamber 120 of the electromagnetic valve 103 also flows into the back pressure chamber 124 through the orifice passage 126, the hot water pressure becomes equal in the inflow chamber 120 and the back pressure chamber 124. However, while the hot water pressure is applied to the diaphragm valve 123 almost entirely from the back pressure chamber 124 side, the hot water pressure is applied only from the inflow chamber 120 side to the portion outside the partition wall 122. Due to the difference in pressure receiving area, the diaphragm valve 123 receives a force in the direction of being pressed against the end of the partition wall 122 from the back pressure chamber 124 side, so that the space between the inflow chamber 120 and the outflow passage 121 is blocked, and the electromagnetic valve 103 is The valve is closed.

  The first check valve 104 connected to the downstream side of the solenoid valve 103 has a valve seat 131 in which a valve hole 130 communicating with the outflow passage 121 of the solenoid valve 103 is formed, and a valve hole by contacting the valve seat 131. And a valve body 132 for closing 130. The valve body 132 is slidably supported by a support plate 134 installed in the first check valve 104, and the support plate 134 has a plurality of through holes through which hot water flowing from the valve hole 130 passes. Has been. Further, an urging spring 133 is provided between the valve body 132 and the support plate 134 and urges the valve body 132 in a direction in which the valve body 132 is pressed against the valve seat 131.

  When the solenoid valve 103 is in the closed state, the pressure of the hot water from the hot water supply device 10 does not reach the outflow passage 121, so that the valve element 132 of the first check valve 104 is seated by the biasing force of the biasing spring 133. The first check valve 104 is closed by being pressed against the valve 131.

  The solenoid valve 103 and the first check valve 104 in the closed state are opened as shown in FIG. 3B by operating as follows. First, when the electromagnetic coil 128 of the electromagnetic valve 103 is energized, the movable iron core 129 is drawn into the electromagnetic coil 128 and the connection passage 125 is unblocked. As a result, the hot water in the back pressure chamber 124 flows out to the outflow passage 121 through the connection passage 125, so that the pressure of the hot water in the back pressure chamber 124 gradually decreases, and the diaphragm valve 123 causes the hot water on the inflow chamber 120 side to flow. The pressure is pushed back to the back pressure chamber 124 side. As a result, the inflow chamber 120 and the outflow passage 121 communicate with each other, and the electromagnetic valve 103 is opened.

  Since the back pressure chamber 124 communicates with the inflow chamber 120 through the orifice passage 126, the hot water in the inflow chamber 120 flows into the back pressure chamber 124 through the orifice passage 126 when the pressure of the hot water in the back pressure chamber 124 decreases. try to. However, since the orifice passage 126 has a smaller diameter than the connection passage 125, the flow rate flowing out of the connection passage 125 is larger than the flow rate flowing in from the orifice passage 126. As a result, the hot water pressure in the back pressure chamber 124 decreases, and the solenoid valve 103 opens.

  When the electromagnetic valve 103 is thus opened, the pressure of the hot water flowing out from the inflow chamber 120 into the outflow passage 121 is applied to the valve body 132 of the first check valve 104, and the valve against the urging force of the urging spring 133 is applied. Since the body 132 is pushed back in the direction in which the body 132 is pulled away from the valve seat 131, the first check valve 104 is opened.

  Thereafter, when the energization of the electromagnetic coil 128 is stopped, the electromagnetic valve 103 in the valve open state slides in a direction in which the movable iron core 129 blocks the connection passage 125. Then, when hot water flows into the back pressure chamber 124 from the inflow chamber 120 through the orifice passage 126, the pressure of the hot water in the back pressure chamber 124 gradually increases, and the diaphragm valve 123 is moved from the back pressure chamber 124 side to the partition wall 122. The solenoid valve 103 returns to the closed state by being pressed against the end of the valve. Further, when the solenoid valve 103 returns to the closed state, the pressure of the hot water from the hot water supply device 10 does not reach the outflow passage 121, so the urging force of the urging spring 133 of the first check valve 104 causes the valve element 132 to move. By pressing against the valve seat 131, the first check valve 104 returns to the closed state.

  In the hot water controller 100 of the present embodiment as described above, it is possible to easily drain water from the hot water controller 100 by operating the heater 107 when draining water to prevent freezing in winter. . Hereinafter, although this point will be described, as a preparation for this, a case where drainage of the hot water controller 100 is performed without operating the heater 107 will be described.

  FIG. 4 is an explanatory diagram showing how water is drained from the hot water filling control device 100 without operating the heater 107. FIG. 4A shows a state before draining, and indicates that the hatched portion in the figure is filled with water. In addition, since the water of the bathtub 2 is drained before draining water, the water of the hot water supply pipe 20 on the downstream side of the second check valve 105 is also drained. In addition, since water filling is not performed when draining water, the solenoid valve 103 is in a closed state, and accordingly, the first check valve 104 and the second check valve 105 are also closed. Yes.

  At the time of draining water, the main plug (not shown) of the water supply pipe 4 is closed, and then the drain plug 3 (see FIG. 1) and the drain plug 7 are opened. Then, as shown in FIG. 4B, the water in the hot water supply pipe 20 upstream of the filter 101 is discharged from the water drain plug 7 (or the water drain plug 3). Moreover, the water in the water pressure pressure pipe 6 is discharged from the water drain plug 3, and the pressure in the water pressure pipe 6 decreases. As a result, the atmosphere release valve 106 is opened, and water between the first check valve 104 and the second check valve 105 is discharged from the atmosphere release valve 106.

  However, between the filter 101 and the first check valve 104, atmospheric pressure does not act on water from the closed first check valve 104 side, and air does not enter. Further, when water in the hot water supply pipe 20 on the upstream side of the filter 101 is removed, atmospheric pressure acts on the water from the upstream side of the filter 101, and surface tension of the water is generated with fine eyes of the filter 101 so that air enters. It becomes difficult. For this reason, even if the water between the filter 101 and the first check valve 104 tries to flow out from the filter 101 side, there is no air to be replaced, so there is no negative pressure between the filter 101 and the first check valve 104. Will occur. Then, the weight of water is supported by the negative pressure, the surface tension of the water in the filter 101, and the atmospheric pressure acting from the upstream side of the filter 101. As a result, the water is left without being discharged. .

  Therefore, in the hot water control apparatus 100 of the present embodiment, a heater 107 for raising the temperature of the water between the filter 101 and the first check valve 104 is provided, and the controller 50 performs the following heater control. By performing the process and operating the heater 107, water can be drained from between the filter 101 and the first check valve 104.

  FIG. 5 is a flowchart showing the heater control process executed by the controller 50. In the heater control process, first, it is determined whether or not a drain button (not shown) connected to the controller 50 has been operated (STEP 100). In the hot water filling system 1 of the present embodiment, when the drain plug 3 and the drain plug 7 are opened at the time of draining, the drain button is operated, and the controller 50 performs draining based on the drain button operation signal. You can grasp the execution. Instead of providing the drain button, the sensor provided in the drain plug 3 or the drain plug 7 may detect the execution of drain and input a detection signal to the controller 50.

  When the drain button is operated (STEP 100: yes), the solenoid valve 103 is turned ON (STEP 102). In this process, the connection coil 125 is unblocked by energizing the electromagnetic coil 128 of the electromagnetic valve 103 (see FIG. 3). In addition, since the main stopper of the water supply pipe 4 is closed at the time of draining water, even if the electromagnetic valve 103 is turned on, the hot water is not filled.

  When the heater 107 is turned on after the solenoid valve 103 is turned on (STEP 104), it is determined whether or not a predetermined temperature rise time has passed (STEP 106). (Step 106: no), and waits until the temperature rising time elapses. As described above, the heater 107 is provided between the flow sensor 102 and the electromagnetic valve 103 and raises the temperature of water left between the filter 101 and the first check valve 104. And since water expand | swells with temperature rising, this expansion | swelling is utilized for drainage.

  FIG. 6 is an explanatory diagram showing the amount of water expansion due to temperature rise. In this embodiment, it is assumed that the volume from the filter 101 to the first check valve 104 is 20.0 ml, and the water temperature before draining is 10 ° C. Since the density of water at a water temperature of 10 ° C. is 0.99990 g / ml, the mass of 20.0 ml of water left between the filter 101 and the first check valve 104 is 19.994 g.

  When the water temperature reaches 50 ° C. by the operation of the heater 107, the density of water becomes 0.98804 g / ml and the mass remains unchanged at 19.994 g, so the volume becomes 20.236 ml. Thus, when the water temperature rises from 10 ° C. to 50 ° C., the expansion amount of water is 0.236 ml, and the volume increases by 1.18% with respect to the water temperature of 10 ° C. Further, when the water temperature is 60 ° C., the density of water becomes 0.98320 g / ml and the volume becomes 20.336 ml. Therefore, the expansion amount of water with respect to the water temperature of 10 ° C. is 0.336 ml, and the volume is 1.68%. To increase. Further, when the water temperature reaches 70 ° C., the density of water becomes 0.97777 g / ml and the volume becomes 20.449 ml. Therefore, the expansion amount of water with respect to a water temperature of 10 ° C. is 0.449 ml, and the volume is 2.24%. To increase.

  FIG. 7 is an explanatory view showing a state in which the heater 107 is operated to drain water from the hot water controller 100. In FIG. 7 as well, the hatched portion is filled with water. First, when the water between the flow sensor 102 and the electromagnetic valve 103 is warmed and expanded by the operation of the heater 107, the pressure in the inflow chamber 120 of the electromagnetic valve 103 increases (see FIG. 3). At this time, the water in the inflow chamber 120 flows into the back pressure chamber 124 through the orifice passage 126, but the connection passage 125 is released (STEP 102 in FIG. 5), so that the pressure in the back pressure chamber 124 increases. First, the diaphragm valve 123 is pushed to the back pressure chamber 124 side, and the electromagnetic valve 103 is opened.

  Thus, in a state where the inflow chamber 120 and the outflow passage 121 of the electromagnetic valve 103 communicate with each other, water flows into the outflow passage 121 from the inflow chamber 120, and the water in the outflow passage 121 is warmed and expanded to expand inside the outflow passage 121. The pressure rises and the pressure is applied to the valve body 132 of the first check valve 104. When the pressure applied to the valve body 132 exceeds the urging force of the urging spring 133, the first check valve 104 is opened as shown in FIG. The urging force of the urging spring 133 in this embodiment corresponds to the “predetermined pressure” in the present invention.

  As described above, when draining water, the atmosphere release valve 106 is opened, and water is discharged from the atmosphere release valve 106 between the first check valve 104 and the second check valve 105, Has been replaced. Therefore, when the first check valve 104 is opened, air can flow in, and atmospheric pressure acts on water from the first check valve 104 side. When air enters from the first check valve 104 in this way, the surface tension of the water generated in the filter 101 can no longer support the weight of the water, so that the water between the filter 101 and the first check valve 104 is filtered. It flows out from the side and is discharged from the water drain plug 7 (or the water drain plug 3) as shown in FIG. 7 (b). In addition, once the surface of the water formed by the filter 101 collapses due to the water flowing out from the filter 101 side, air easily passes through the filter 101, and then the first check valve 104 is closed. Even if the valve is used, water between the filter 101 and the first check valve 104 can be discharged.

  As described above, in the hot water control apparatus 100 according to the present embodiment, the temperature of the water left between the filter 101 and the first check valve 104 is increased by the heater 107, and the first check valve is expanded by the expansion of the water. 104 can be opened and water can be easily drained from the hot water controller 100.

  In the heater control process of FIG. 5, the operation of the heater 107 is maintained until a predetermined temperature rise time elapses. The temperature rise time is a temperature (expansion amount) at which the first check valve 104 can be opened according to the urging force of the urging spring 133 of the first check valve 104 and the capability of the heater 107. The time sufficient to raise the temperature of the water between the filter 101 and the first check valve 104 is set. If the temperature raising time has elapsed (STEP 106: yes), the heater 107 is turned off (STEP 108), and then the solenoid valve 103 is turned off (STEP 110), and the process returns to the top of the heater control process.

  Here, in the hot water control apparatus 100 of the present embodiment as described above, when the temperature of the water is increased (expanded) by the heater 107, the first check valve 104 is opened, so that the first reverse valve 104 and the first reverse valve are opened. Although water can be drained from the stop valve 104, water can be drained by the following action even when the first check valve 104 is not opened. First, when water between the filter 101 and the first check valve 104 is warmed and expanded by the operation of the heater 107, the pressure increases between the filter 101 and the first check valve 104, and the pressure is increased. Is added to the first check valve 104 and the filter 101. And even if the first check valve 104 does not open, the pressure is released by the water oozing out from the filter 101.

  After the water has oozed out of the filter 101 in this way, when the temperature rise time elapses and the heater 107 is turned off, the water between the filter 101 and the first check valve 104 contracts as it gradually cools. Then, since water oozes from the filter 101 between the filter 101 and the first check valve 104, a larger negative pressure is generated than before the heater 107 is operated. Air enters by breaking the surface tension. Then, once the surface of the water is collapsed due to the entry of air from the filter 101, the air easily passes through the filter 101. Water between the valve 104 can be discharged.

  Moreover, in the hot water control apparatus 100 of the present embodiment, the heater 107 is operated even when water is not drained. In the heater control process shown in FIG. 5, if the drain button is not operated (STEP 100: no), then it is determined whether or not a predetermined period (for example, one month) has elapsed without filling with hot water. (STEP 112). Normally, the water supplied through the water supply pipe 4 is sterilized with chlorine. However, if the hot water filling is not performed for a long time (for example, two months or more), the water remaining in the hot water control device 100 is stored. Contaminated bacteria can grow and cause slime. When the orifice passage 126 and the connection passage 125 of the solenoid valve 103 are clogged particularly with such slimming, the solenoid valve 103 will not close or water between the solenoid valve 103 and the first check valve 104 will drain when draining water. Problems such as being unable to come off occur.

  Therefore, in the hot water control apparatus 100 of the present embodiment, when the predetermined period has passed without hot water filling (STEP 112: yes), the heater 107 is turned on (STEP 114). In addition, the capability of the heater 107 here may be the same as STEP104, and may be switched. The heater 107 raises the temperature of the water between the flow sensor 102 and the solenoid valve 103, whereby the water can be sterilized to suppress the growth of bacteria, and as a result, the occurrence of slime due to the growth of bacteria can be prevented. It becomes possible.

  In this embodiment, the operation of the heater 107 is maintained until a predetermined sterilization time elapses. This sterilization time is set to a sufficient time according to the temperature and heating time required for sterilization. In the case of Pseudomonas aeruginosa as an example of bacteria, it is known that when heated to 55 ° C., it will die in 1 hour. Therefore, in the heater control process of FIG. 5, when the heater 107 is turned on, it is determined whether or not the sterilization time has elapsed (STEP 116). If the sterilization time has not elapsed (STEP 116: no), the sterilization time is determined. Wait until it has passed. Thereafter, when the sterilization time has elapsed (STEP 116: yes), the heater 107 is turned off (STEP 118), and the process returns to the head of the heater control process.

  When returning to the head of the heater control process, if the drain button is not operated (STEP 100: no), it is determined again whether or not the predetermined period has passed (STEP 112), and until the predetermined period has passed (STEP 112: no) ), The process of STEP114 to STEP118 is omitted and the process waits. And if a predetermined period passes (STEP112: yes), the process of STEP114-STEP118 is performed again, and the water in the hot water control apparatus 100 is heat-sterilized. Thus, by performing heat sterilization regularly, even when hot water filling is not performed for a long period of time, generation | occurrence | production of slime can be prevented.

  As mentioned above, although the hot water control apparatus 100 of the present embodiment has been described, the present invention is not limited to the above-described embodiment, and can be implemented in various modes without departing from the gist thereof.

1 ... hot water system, 2 ... bathtub, 3 ... water tap,
4 ... Water supply piping, 5 ... Gas piping, 6 ... Water pressure piping,
7 ... Water tap, 8 ... Karan, 10 ... Hot water supply device,
11 ... burner, 12 ... combustion fan, 13 ... heat exchanger,
20 ... Hot water supply pipe, 50 ... Controller, 100 ... Hot water tension control device,
101 ... Filter, 102 ... Flow sensor, 103 ... Solenoid valve,
104 ... 1st check valve, 105 ... 2nd check valve, 106 ... Air release valve,
107: heater, 120: inflow chamber, 121: outflow passage,
122 ... partition wall, 123 ... diaphragm valve, 124 ... back pressure chamber,
125 ... Connection passage, 126 ... Orifice passage, 127 ... Actuator,
128: Electromagnetic coil, 129: Movable iron core, 130: Valve hole,
131 ... Valve seat, 132 ... Valve body, 133 ... Biasing spring,
134: Support plate.

Claims (2)

Provided in a hot water supply passage for supplying hot water from the hot water supply device to the bathtub, and when the hot water pressure on the hot water supply side becomes equal to or higher than a predetermined pressure, the valve is opened to pass hot water and the hot water pressure on the hot water supply side A check valve that closes when the pressure becomes less than the predetermined pressure and prevents the back flow of hot water, and hot water supplied from the hot water supply device provided in the hot water supply passage on the hot water supply side of the check valve. A hot water tension control device comprising: a filter that removes foreign matter from the water, and an air release valve that opens when the pressure of clean water supplied to the hot water supply device decreases and discharges hot water on the bathtub side from the check valve In
A heater is provided between the check valve and the filter that operates for a predetermined time when the hot water controller is drained to raise the temperature of hot water between the check valve and the filter. A hot water control device characterized by that. In the hot water control apparatus according to claim 1,
The heater is activated even when the hot water supply control device is not drained and the hot water supply from the hot water supply device to the bathtub is not performed for a predetermined period, and the check valve, the filter, A hot water control device characterized by raising the temperature of hot water between the two.

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