JP3984621B2 - Hot water storage system - Google Patents

Description

  The present invention relates to a hot water storage tank hot water supply system using a heat storage hot water storage tank.

  In a hot water tank hot water supply system, it is common to use a 2-input 1-output mixing valve in order to obtain hot water having a desired temperature by mixing hot water in a hot water tank with city water (tap water).

  For example, Patent Document 1 discloses a method in which city water is mixed with hot water having an arbitrary temperature stored by operation of a heat pump water heater and mixed with a mixing valve to supply hot water at a set temperature.

For example, in patent document 2, when mixing city water with the hot water of a solar water heater with a mixing valve, the thing which changes the mixing ratio of the hot water and city water by a mixing valve according to a hot water supply use and preset temperature is disclosed. Yes.
JP-A-9-126547 JP 2000-81246 A

  When hot water that has been naturally collected and hot water boiled by midnight power or the like is stored in one hot water tank, hot water is stored in the upper part of the hot water tank and intermediate hot water is stored in the lower part. In the prior art, the hot water outlet of the hot water tank is only provided at the top, and there are the following problems.

  Hot water from the hot water storage tank is always performed first from the high-temperature water at the top of the hot water tank. Medium-temperature water tends to accumulate in the tank, and when high-temperature hot water supply becomes necessary, the required amount is insufficient, or a heat exchanger for heating. Necessary temperature cannot be taken when trying to use it. For this reason, it is necessary to boil using electricity and gas from the middle.

  In addition, as described above, medium-temperature water tends to accumulate in the hot water storage tank, and the temperature in the lower part of the tank is unlikely to decrease. .

  An object of the present invention is to stably use heat storage hot water supply and heat exchange for heating in a hot water storage tank hot water supply system, and to improve heat exchange efficiency of heat exchange for heat storage.

  Moreover, the subject of this invention exists in utilizing the warm water of the upper part-middle lower part of a hot water tank widely.

The invention according to claim 1 is a hot water storage tank, a first pipe for discharging hot water from an upper portion of the hot water storage tank, a second pipe for discharging hot water from the middle of the hot water storage tank, and a first pipe for discharging hot water from the first pipe. In the hot water storage hot water supply system comprising: 1 piping water or 2nd piping water discharged from the second piping and city water, and a mixing valve control device that generates hot water having a predetermined set temperature. The valve control device mixes the first piping water and the city water at the beginning of hot water supply , and then discharges the second piping water .

  According to the first aspect of the present invention, the mixing valve control device draws out the hot water from the hot water storage tank not only from the first pipe on the upper side (hot water side) but also from the second pipe on the middle side (medium hot water side). I also tried to do it. Therefore, it becomes difficult to reduce the high-temperature water, the necessary amount of high-temperature water can be secured for when the hot-water supply water becomes necessary, and the necessary temperature for use in a heat exchanger for heating can be secured in the high-temperature water. .

  Since the mixing valve controller can discharge the middle temperature water in the middle of the hot water storage tank from the second pipe, the temperature in the lower part of the tank will be lowered, and a heat pump and a solar heat storage heat exchanger will be installed in the lower part of the tank. The heat exchange efficiency when installed in the can be improved.

  Since the mixing valve control device can discharge the middle temperature water in the middle of the hot water storage tank from the second pipe, the middle temperature water produced by natural heat can be used positively, so that the natural heat can be used effectively. In addition, if the temperature of the medium temperature water is high, the high temperature water made from electricity or gas is not used, thus saving energy.

  Since the mixing valve control device has a sensor for detecting the temperature of the second piping water, the first temperature while accurately grasping the temperature of the medium temperature water in the tank that is not stable depending on the amount of heat stored and used in the hot water storage tank, The mixing ratio of the piping water, the second piping water, and the city water is controlled, and the hot water supply temperature can be controlled with high accuracy and high efficiency.

  Moreover, the average use temperature of hot water supply is often about the middle temperature water. Therefore, if the mixing valve control device controls to discharge the first piping water at the upper part of the tank at the beginning of hot water supply from the hot water storage tank, then the second piping water in the middle of the tank is discharged. As a result, the hot water in the upper to middle and lower parts of the hot water tank can be widely used, and deterioration of water quality due to the accumulated water in the tank can be prevented.

According to a second aspect of the present invention, there is provided a hot water storage tank, a first pipe for discharging hot water from an upper portion of the hot water storage tank, a second pipe for discharging hot water from the middle of the hot water storage tank, the first pipe and the second pipe. A primary control valve for connecting the pipe, a discharge pipe connected to the primary control valve, a city water pipe, a second control valve for connecting the discharge pipe and the city water pipe, and the second control valve. A sensor for measuring the temperature of the second piping water flowing in the piping, the first piping water discharged from the first piping, the second piping water discharged from the second piping, and the city water piping. In a hot water storage hot water supply system comprising: a controller that mixes at least two of city water to be generated and generates hot water having a predetermined set temperature;
The controller is characterized in that only the first piping water is discharged to the discharge pipe by the primary control valve at the beginning of hot water supply , and then the second piping water is discharged.

  ADVANTAGE OF THE INVENTION According to this invention, in a hot water storage tank hot water supply system, it can utilize stably for high temperature hot water supply, heat exchange for heating, etc., and can improve the heat exchange efficiency of heat exchange for heat storage.

  Moreover, according to this invention, the warm water of the upper part-middle lower part of a hot water tank can be utilized widely.

  FIG. 1 is a piping diagram showing a basic configuration of a hot water tank hot water supply system, FIG. 2 is a piping diagram showing a hot water tank hot water supply system of the first embodiment, and FIG. 3 is a piping diagram showing a hot water tank hot water supply system of the second embodiment. 4 is a piping diagram showing a hot water tank hot-water supply system of the third embodiment, FIG. 5 is a longitudinal sectional view of one embodiment of the control valve, FIG. 6A is a sectional view taken along the line AA of FIG. ) Is a cross-sectional view taken along the line BB in FIG. 5, FIG. 6C is a cross-sectional view taken along the line CC in FIG. 5, and FIG. 8 is a cross-sectional view showing an operation state further rotated about 30 ° from the state of FIG. 7, FIG. 9 is a cross-sectional view showing an operation state further rotated about 30 ° from the state of FIG. 8, and FIG. 10 is a state of FIG. It is sectional drawing which shows the operation state which further rotated about 30 degrees from the.

  The hot water storage tank hot water supply system 10 of FIG. The hot water storage tank 11 connects the city water pipe 12 (water pipe) to the lowermost part in the tank, heats and stores the city water to about 90 ° C. with the heater 13 for heating, and is provided at the lower part in the tank. In addition, it is possible to store medium temperature water of about 30 ° C. to 60 ° C. by using a heat pump 14 or a solar heat storage heat exchanger 14. For example, the heat storage heat exchanger 14 passes a heat exchange pipe in the tank, and heats the water by heat exchange between the surface of the pipe and the water in the tank.

  The hot water storage tank 11 has a first pipe 21 that discharges high-temperature water in the upper part of the tank and a second pipe 22 that discharges medium-temperature water in the middle. The second pipe 22 is arranged near the upper limit level of the medium temperature water in the tank, for example, near the position of the heater 13 for boiling. Moreover, the hot water storage tank 11 is provided with the heat exchanger 15 for heating in the upper part in a tank.

  The hot water storage tank hot water supply system 10 includes a mixing valve control device 30. The mixing valve control device 30 includes a controller 31 and a mixing valve 40. The mixing valve 40 is generated by the controller 31 so as to generate hot water having a preset temperature by inputting the controller 31 and supply hot water to the hot water supply pipe 23. The first piping water discharged from the first piping 21, the second piping water discharged from the second piping 22, and the city water supplied from the city water piping 12 are appropriately mixed with each other. Mix in ratio. The mixing valve 40 is composed of a three-input one-output control valve (mixing valve), or two two-input one-output control valves (one control valve is a selection control valve or a mixing valve, and the other one The control valve can be a combination of mixing valves.

  At this time, the mixing valve control device 30 has a sensor 32 for detecting the temperature of the second piping water in the second piping 22, and the first piping water based on the comparison result between the detected temperature and the set temperature. And the mixing ratio of the second piping water and city water is controlled.

Hereinafter, a specific example of the mixing valve control device 30 will be described.
(First Embodiment) (FIG. 2)
The mixing valve control device 30 of the first embodiment includes a 2-input 1-output primary control valve 41 (selection control valve) (a mixing valve is acceptable) to which the first pipe 21 and the second pipe 22 are connected, A discharge pipe of the primary control valve 41 and a secondary control valve 42 (mixing valve) with two inputs and one output to which the city water pipe 12 is connected are provided, and the discharge pipe of the secondary control valve 42 is used as a hot water supply pipe 23. Is.

  The controller 31 of the mixing valve control device 30 selects the first piping water and the second piping water by the electric valve opening motor 41A of the primary control valve 41 based on the temperature detected by the sensor 32 (or mixes at a constant mixing ratio). In addition, the mixing ratio of the discharge water and city water of the primary control valve 41 is controlled by the electric valve opening motor 42A of the secondary control valve 42, and as a result, hot water having a set temperature is generated.

  For example, when the temperature of the second piping water detected by the sensor 32 is equal to or lower than the set temperature, the first control water 41 selects and discharges the first piping water, and the mixing temperature of the discharge water and city water is set. Mixing control is performed by the secondary control valve 42 so that the temperature is reached. On the other hand, when the temperature of the second piping water detected by the sensor 32 is higher than the set temperature, the first control valve 41 selects and discharges the second piping water, and the mixed temperature of the discharge water and city water is the set temperature. Thus, the mixing control is performed by the secondary control valve 42.

  At this time, the controller 31 of the mixing valve control device 30 supplies the first piping water by the electric valve opening motor 41A of the primary control valve 41 so that the first piping water is always discharged at the beginning of hot water supply from the hot water storage tank 11. Selection (or mixing of the first piping water and the second piping water) is controlled. If the controller 31 sets the electric valve opening motor 41A of the primary control valve 41 as described above at the end of the previous hot water supply, the first piping water can be discharged immediately without delaying the initial stage of the next hot water supply.

According to this embodiment, there are the following operations.
The mixing valve control device 30 is configured to discharge hot water from the hot water storage tank 11 not only from the first pipe 21 on the upper side (high temperature water side) but also from the second pipe 22 on the middle side (medium temperature water side). Accordingly, it is difficult to reduce the high-temperature water, so that a necessary amount of high-temperature water can be secured for the case where high-temperature hot water is needed, and the necessary temperature for use in the heat exchanger 15 for heating can be secured at a high temperature. .

  Since the mixing valve control device 30 can discharge the middle temperature water in the middle of the hot water storage tank 11 from the second pipe 22, the temperature of the lower part in the tank is also lowered, so that the heat storage heat exchanger 14 using heat pump and solar heat is used. The heat exchange efficiency when installed in the lower part of the tank can be improved.

  Since the mixing valve control device 30 has the sensor 32 for detecting the temperature of the second piping water, while accurately grasping the temperature of the medium temperature water in the tank that is not stable depending on the heat storage amount and usage amount of the hot water storage tank 11. The mixing ratio of the first piping water, the second piping water, and the city water is controlled, and the hot water supply temperature can be controlled with high accuracy and high efficiency.

  The average operating temperature of hot water supply is often about the middle temperature water. Therefore, if the mixing valve control device 30 is controlled to always discharge the first piping water (high temperature water) in the upper part of the tank at the beginning of the hot water supply from the hot water tank 11, then the middle of the tank In many cases, the control is switched so that hot water (second piping water) is discharged, and as a result, the hot water in the upper part to the lower part of the hot water tank 11 is widely used, and the water quality deteriorates due to the generation of accumulated water in the tank. Can be prevented.

Second Embodiment (FIG. 3)
The mixing valve control device 30 of the second embodiment includes a 2-input 1-output primary control valve 51 (selection control valve) (a mixing valve is acceptable) to which the first pipe 21 and the city water pipe 12 are connected, and 1 A discharge pipe of the secondary control valve 51 and a secondary control valve 52 (mixing valve) with two inputs and one output connected to the second pipe 22 are provided, and the discharge pipe of the secondary control valve 52 is used as a hot water supply pipe 23. Is.

  Based on the temperature detected by the sensor 32, the controller 31 of the mixing valve control device 30 selects (or mixes) the first piping water and city water by the electric valve opening motor 51A of the primary control valve 51 (or mixing at a constant mixing ratio). Further, the mixing ratio of the discharge water of the primary control valve 51 and the second piping water is controlled by the electric valve-opening motor 52A of the secondary control valve 52, and as a result, hot water having a set temperature is generated.

  For example, when the temperature of the second piping water detected by the sensor 32 is equal to or lower than the set temperature, the first piping water is selected and discharged by the primary control valve 51, and the mixed temperature of this discharged water and the second piping water Is controlled by the secondary control valve 52 so that becomes the set temperature. On the other hand, when the temperature of the second piping water detected by the sensor 32 is higher than the set temperature, the city water is selected and discharged by the primary control valve 51, and the mixed temperature of the discharge water and the second piping water is the set temperature. Thus, the secondary control valve 52 controls the mixing.

At this time, the controller 31 of the mixing valve control device 30 supplies the first piping water by the electric valve opening motor 51A of the primary control valve 51 so that the first piping water is always discharged at the beginning of hot water supply from the hot water storage tank 11. Select (or mix the first piping water and city water) and control. If the controller 31 sets the electric valve opening motor 51A of the primary control valve 51 as described above at the end of the previous hot water supply, it can immediately discharge the first pipe water without delaying the initial stage of the next hot water supply.
According to this embodiment, the same operation as in the first embodiment is achieved.

(Third Embodiment) (FIG. 4)
The mixing valve control device 30 of the third embodiment includes a 2-input 1-output primary control valve 61 (selection control valve) (a mixing valve is acceptable) to which the second pipe 22 and the city water pipe 12 are connected, and 1 A discharge pipe of the secondary control valve 61 and a secondary control valve 62 (mixing valve) with two inputs and one output connected to the first pipe 21 are provided, and the discharge pipe of the secondary control valve 62 is used as a hot water supply pipe 23. Is.

  Based on the temperature detected by the sensor 32, the controller 31 of the mixing valve control device 30 selects (or mixes) the second piping water and city water by the electric valve opening motor 61A of the primary control valve 61 (or mixing at a constant mixing ratio). Further, the mixing ratio of the discharge water of the primary control valve 61 and the first pipe water is controlled by the electric valve opening motor 62A of the secondary control valve 62, and as a result, hot water having a set temperature is generated.

  For example, when the temperature of the second piping water detected by the sensor 32 is equal to or lower than the set temperature, the second piping water is selected and discharged by the primary control valve 61, and the mixing ratio of the discharged water and the first piping water is Is controlled by the secondary control valve 62 so that becomes the set temperature. On the other hand, when the temperature of the second piping water detected by the sensor 32 is higher than the set temperature, the city water is selected and discharged by the primary control valve 61, and the mixed temperature of the discharge water and the first piping water is the set temperature. Thus, the mixing control is performed by the secondary control valve 62.

At this time, the controller 31 of the mixing valve control device 30 supplies the first piping water by the electric valve opening motor 62A of the secondary control valve 62 so that the first piping water is always discharged at the beginning of hot water supply from the hot water storage tank 11. Control hot water.
According to this embodiment, the same operation as in the first embodiment is achieved.

(4th Embodiment) (FIGS. 5-10)
The mixing valve control device 30 according to the fourth embodiment is that a mixing valve 100 having three inputs and one output is used as the mixing valve 40 in FIG. The mixing valve 100 has a first inlet 111, a second inlet 112, and a third inlet 113 to which the first pipe 21, the second pipe 22, and the city water pipe 12 are respectively connected. It has one outlet 114 to which the hot water supply pipe 23 is connected.

  5 and 6, the mixing valve 100 includes a valve main body 110 and a valve body 120 rotatably disposed in the valve main body 110. The valve main body 110 includes a first inlet 111, a first inflow valve. Two inlets 112, a third inlet 113, and one outlet 114 are provided. The valve main body 110 is formed in a cylindrical shape that opens downward by metal casting, plastic molding, or the like, and a lid 115 is screwed into a waterproof state with a packing 116 sandwiched in the lower opening. Is formed. The outlet 114 mixes and flows out the fluids that have entered from the three inlets 111, 112, and 113.

  On the outer periphery of the first inlet 111, the second inlet 112, the third inlet 113, and the outlet 114, there are a first pipe 21, a second pipe 22, a city water pipe 12, and a hot water supply pipe, respectively. An attachment screw portion for attaching 23 pipes is formed. The valve body 120 fitted into the valve body 110 has a shaft portion 125 that integrally pivots upward to pivot the valve body 120, and the upper end of the shaft portion 125 projects from the valve body 110 to the outside. A square shaft portion 126 for attaching a lever (not shown) or the like is formed. The shaft portion 125 is kept waterproof from the valve body 110 by the packing 127. Thus, the valve main body 110 is configured so that fluids entering from the three inlets 111, 112, and 113 are mixed and exit from the one outlet 114, so that water does not leak.

  The first inlet 111, the second inlet 112, and the third inlet 113 are provided in the horizontal direction in FIG. 5 from the valve body 110, that is, in the direction orthogonal to the cylindrical axial direction. The upper first inlet 111 is formed on one side of the valve body 110, that is, on the left side in FIG. 5, and the second inlet 112 is spaced from the first inlet 111 at the lower left side. Formed on the side. The third inlet 113 is formed on the other side of the valve main body 110, that is, on the right side from the upper and lower central portions corresponding to the distance between the first inlet 111 and the second inlet 112. Thus, since the third inlet is formed on the opposite side of 180 degrees corresponding to the distance between the first inlet 111 and the second inlet 112, the valve body 110 can be made thin, Since the inflow ports 111, 112, and 113 do not approach, the piping work of the first pipe 21, the second pipe 22, and the city water pipe 12 can be easily performed.

  The valve body 120 has a cylindrical shape that is in contact with the inner surface of the valve body 110, is formed by metal casting, plastic molding, or the like, and has a first opening 121 that can communicate with the first inflow port 111 of the valve body 110. The second opening 122 that can communicate with the second inlet 112 and the third opening 123 that can communicate with the third inlet 113 are formed at the same phase. . That is, in this example, the second opening 122 is shifted by about 60 degrees clockwise as shown in FIG. 6C with respect to the first opening 121, and the third opening 123 is different from the first opening 121 in FIG. As shown in (b), it is formed by shifting by about 60 degrees counterclockwise. Then, by rotating the valve body 120, the first opening 121, the second opening 122, and the third opening 123 are sequentially connected to the first inlet 111, the second inlet 112, and the third inlet 113. , Arranged to communicate. A lower portion of the valve body 120 is opened, and serves as an outflow opening 124 facing the outflow port 114. 5 and 6 show a state in which the first inflow port 111 and the first opening 121 coincide with each other and face each other.

  In this example, as shown in FIG. 6 (a), when the first inflow port 111 and the first opening 121 are 100% opposite to each other and communicate with each other, as shown in FIG. 6 (c). The second inlet 112 and the second opening 122 are set so as not to communicate with each other, but the second inlet 112 and the second opening 122 are set so as to slightly communicate with each other and overlap. May be switched. As will be described later, the third inlet 113 is set in the same manner, but may be set so as to overlap.

  The mixing operation of the mixing valve 100 of the present embodiment configured as described above will be described with reference to FIGS. In the mixing valve 100, high-temperature water (first piping water) is supplied to the first inlet 111, intermediate-temperature water (second piping water) is supplied to the second inlet 112, and the third inlet 113. Is supplied with low-temperature water (city water) and supplied with hot water for hot water supply or floor heating from the outlet 114, and by rotating the shaft portion 125, high-temperature water, medium-temperature water, and low-temperature water are provided. Can mix and drain water.

  In the state of FIG. 6, the upper first inlet 111 and the first opening 121 communicate with each other, and the second inlet 112 and the third inlet 113 communicate with the second opening 122 and the third opening 123. First, high temperature water flows in from the first inlet 111 and flows out from the outlet 114. When the valve body 120 is rotated about 30 ° counterclockwise from the state of FIG. 6, the state of FIG. 7 is obtained, and the first inlet 111 and the first opening 121 communicate with each other about half, and the second inlet 112 and the second opening 122 communicate with each other about half, and the third inlet 113 does not communicate with the third opening 123. The state of FIG. 7 is a state in which the hot water flowing in from the first inlet 111 and the medium-temperature water flowing in from the second inlet 112 are mixed and flow out from the outlet 114.

  While the valve body 120 is rotated from the state of FIG. 6 to the state of FIG. 7, the amount of high-temperature water flowing from the first inflow port 111 gradually decreases corresponding to the rotation angle of the valve body 120. Since the amount of intermediate temperature water flowing from the second inlet 112 gradually increases, the mixing ratio can be gradually changed continuously. In the state of FIG. 7, substantially the same amount of fluid flows into the valve body 120 from the first inlet 111 and the second inlet 112, and flows out of the outlet 114 through the outlet opening 124. Note that the first inlet 111 and the first opening 121 may be formed in a rectangular hole so that the mixing ratio changes in proportion to the rotation angle of the valve body 120.

  When the valve body 120 is further rotated about 30 ° counterclockwise from the state of FIG. 7, the state of FIG. 8 is obtained, and the first inlet 111 does not communicate with the first opening 121 and the second inlet 112. Is in communication with the second opening 122, and the third inlet 113 is not in communication with the third opening 123. In the state of FIG. 8, medium-temperature water flows only from the second inlet 112, and only medium-temperature water flows out from the outlet 114. In the state of FIG. 8, when the second inlet 112 and the second opening 122 are 100% opposite to each other and coincide with each other, the first inlet 111 and the first opening 121 are set so as not to communicate with each other. However, it may be slightly communicated.

  While the valve body 120 is rotated from the state of FIG. 7 to the state of FIG. 8, the amount of hot water flowing from the first inflow port 111 further gradually decreases in accordance with the rotation angle of the valve body 120. In addition, since the amount of the intermediate temperature water flowing from the second inlet 112 further gradually increases, the mixing ratio of the intermediate temperature water can be increased gradually and continuously. In the state of FIG. 2 inflow port 112 and outflow port 114 through outflow opening 124. As described above, the rotation angle and the mixing ratio may be proportional.

  When the valve body 120 is further rotated by about 30 ° from the state of FIG. 8, the state of FIG. 9 is obtained. The first inlet 111 does not communicate with the first opening 121, and the second inlet 112 is the second. The third inflow port 113 communicates with the third opening 123 in communication with the opening 122. The state of FIG. 9 is a state in which medium-temperature water flowing in from the second inlet 112 and low-temperature water flowing in from the third inlet 113 are mixed and flow out from the outlet 114 (see FIG. 5). .

  While the valve body 120 is rotated from the state of FIG. 8 to the state of FIG. 9, the amount of intermediate temperature water flowing from the second inlet 112 gradually decreases in accordance with the rotation angle of the valve body 120. Since the amount of low-temperature water flowing from the third inlet 113 gradually increases, the mixing ratio can be changed gradually and continuously. In the state of FIG. 9, substantially the same amount of fluid flows into the valve body 120 from the second inlet 112 and the third inlet 113 and flows out from the outlet 114 through the outlet opening 124.

  When the valve body 120 is further rotated approximately 30 ° counterclockwise from the state of FIG. 9, the state of FIG. 10 is obtained, and the first inlet 111 does not communicate with the first opening 121 and the second inlet 112. Also, the second opening 122 is not communicated, and only the third inflow port 113 is in communication with the third opening 123. In the state of FIG. 10, low temperature water flows only from the third inlet 113 and only low temperature water flows out from the outlet 114. In the state shown in FIG. 10, when the third inlet 113 and the third opening 123 face each other 100%, the second inlet 112 and the second opening 122 are set not to communicate with each other. However, it may be slightly communicated.

  While the valve body 120 is rotated from the state of FIG. 9 to the state of FIG. 10, the amount of medium-temperature water flowing from the second inlet 112 further gradually decreases corresponding to the rotation angle of the valve body 120. In addition, since the amount of the low temperature water flowing from the third inlet 113 further increases gradually, the mixing ratio of the low temperature water can be gradually increased while reducing the medium temperature water. Only low-temperature water flows into the valve body 120 from the third inlet 113 and flows out from the outlet 114 through the outlet opening 124.

  When the desired set temperature of the hot water flowing out from the outlet 114 is higher than the intermediate temperature water of the second inlet 112, the position of the valve body 120 is set as shown in FIGS. 6 to 8 so as to mix the high temperature water and the intermediate temperature water. Set to any position and set the mixing ratio. Further, when the desired set temperature of the hot water flowing out from the outlet 114 is lower than the medium temperature water, the position of the valve body 120 is set to an arbitrary position in FIGS. 8 to 10 so as to mix the medium temperature water and the low temperature water. To set the mixing ratio. In this way, since the warm water supplied to the second inlet 112 from the heat storage heat exchanger 14 or the like using solar heat can be actively used, solar energy can be effectively used. In addition, when the temperature of the medium temperature water is high, such as during fine weather, high temperature water using electricity or gas is not used, so that energy can be greatly reduced.

  In the embodiment described above, the valve body is shown as an example of a cylinder, but it is needless to say that a valve body such as a sphere may be used. You may comprise the axial part which rotates a valve body so that it may be rotated by the electric mechanism which combined the motor and the gear, for example. Then, the rotation angle of the valve body may be controlled via an electric mechanism so that the temperature and concentration of the mixed fluid can be detected and mixed to a desired set temperature and concentration. Even in the case of automatic control as described above, since only one shaft portion is rotated, the control can be easily performed.

  Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration of the present invention is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. Is included in the present invention.

It is a piping diagram which shows the basic composition of a hot water storage tank hot water supply system. It is a piping diagram showing the hot water tank hot water supply system of the first embodiment. It is a piping diagram which shows the hot water storage tank hot water supply system of 2nd Embodiment. It is a piping diagram which shows the hot water storage tank hot water supply system of 3rd Embodiment. It is a longitudinal cross-sectional view of one Embodiment of a control valve. (A) is the sectional view on the AA line of FIG. 5, (b) is the sectional view on the BB line of FIG. 5, (c) is the sectional view on the CC line of FIG. It is sectional drawing which shows the operation state rotated about 30 degrees from the state of FIG. It is sectional drawing which shows the operation state which further rotated about 30 degrees from the state of FIG. It is sectional drawing which shows the operation state which further rotated about 30 degrees from the state of FIG. FIG. 10 is a cross-sectional view showing an operation state further rotated by about 30 ° from the state of FIG. 9.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Hot water storage tank hot water supply system 11 Hot water storage tank 12 City water piping 21 1st piping 22 2nd piping 30 Mixing valve control apparatus 32 Sensor 41,51,61 Primary control valve 42,52,62 Secondary control valve 100 Mixing valve 110 valve body 111 first inlet 112 second inlet 113 third inlet 114 outlet 115 lid 120 valve body 121 first opening 122 second opening 123 third opening 124 outflow opening 125 shaft portion

Claims (2)

A hot water storage tank, a first pipe discharging from the upper part of the hot water storage tank, a second pipe discharging from the middle of the hot water storage tank, and the first pipe water discharged from the first pipe or the second pipe In a hot water storage tank hot water supply system comprising: a mixing valve control device that mixes the second piping water discharged from the piping with city water and generates hot water having a predetermined set temperature;
The hot water tank hot water supply system characterized in that the mixing valve control device mixes the first piping water and the city water at the beginning of hot water supply , and then discharges the second piping water . A primary control for connecting the hot water storage tank, the first piping for discharging hot water from the upper part of the hot water storage tank, the second piping for discharging hot water from the middle of the hot water storage tank, and the first piping and the second piping. A valve, a discharge pipe connected to the primary control valve, a city water pipe, a second control valve connecting the discharge pipe and the city water pipe, and a second pipe water flowing in the second pipe At least one of a sensor for measuring the temperature of the first piping water discharged from the first piping, a second piping water discharged from the second piping, and city water discharged from the city water piping. In a hot water storage hot water supply system comprising: a controller that mixes two and generates hot water having a predetermined set temperature;
The controller is configured to discharge only the first piping water to the discharge pipe by the primary control valve at the beginning of hot water supply , and then discharge the second piping water. .

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