JP2008185226A - Expansion tank and hot water supply system using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To balance a pressure in a hot water supply pipe and a pressure in a water supply pipe regardless of temperatures of hot water. <P>SOLUTION: This expansion tank 1 used in a hot water supply system 2 including a hot water supply system for supplying water of normal temperatures, and a hot water supply system for supplying water of high temperatures prepared by heating the water of normal temperatures, comprises a water supply-side connection port 12 connected to the water supply system, a hot water supply-side connection port 11 connected to the hot water supply system, and a displaceable blocking member 13 for blocking the water supply-side connection port 12 and the hot water supply-side connection port 11 so that they are not connected to each other inside. When the blocking member 13 is displaced to a water supply-side connection port 12 side according to the inflow water of high temperatures from the hot water supply system through the hot water supply-side connection port 11, the water of normal temperatures is discharged through the water supply-side connection port 12 by the quantity equal to that of the inflow water of high temperatures, and when the blocking member 13 is displaced to a hot water supply-side connection port 11 side according to the outflow water of high temperatures from the hot water supply system through the hot water supply-side connection port 11, the water of normal temperatures flows in through the water supply-side connection port 12 by the quantity equal to that of the outflow water of high temperatures. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an expansion tank and a hot water supply system using the expansion tank.

  Conventionally, in a hot water supply pipe of a hot water supply system, an expansion tank is provided in order to absorb a change in pressure due to expansion and contraction due to a temperature change in hot water in the pipe.

  There are open and closed expansion tanks. The open type has the advantage that the hot water supply pressure can be kept constant and the structure is simple, but the installation location is limited to high places such as the rooftop, freezing in winter, and piping due to air contamination There were defects such as corrosion.

In order to compensate for the drawbacks of these open expansion tanks, a closed expansion tank having a structure that absorbs the amount of expansion of hot water in the hot water supply pipe using the elasticity of air has been developed (for example, Non-Patent Document 1 and Patent Document 1).
Hitachi Metals / Product Information / Plumbing / Equipment Components MENU / Sealed diaphragm expansion tank [online] [Search on December 26, 2006] Internet <URL: http://www.hitachi-metals.co.jp/ prod / prod08 / p08_21.html> JP-A-10-288348

  However, although this closed expansion tank can eliminate the above-mentioned drawbacks of the open expansion tank, there are new problems such as a pressure imbalance between the water supply pipe and the hot water supply pipe.

  The present invention provides an expansion tank capable of balancing the pressure in the hot water supply pipe and the pressure in the water supply pipe regardless of the hot water temperature, and a hot water supply system using the expansion tank. Objective.

A first invention is an expansion tank used in a hot water supply system including a water supply system for supplying normal temperature water and a hot water supply system for supplying high temperature water generated by heating normal temperature water supplied by the water supply system. There,
A water supply side connection port connected to the water supply system;
A hot water supply side connection port connected to the hot water supply system;
A displaceable blocking member that blocks the water supply side connection port and the hot water supply side connection port so as not to communicate with each other inside,
When hot water flows in from the hot water supply system through the hot water supply side connection port, the blocking member is displaced to the water supply side connection port side in response to this, so that the same amount of normal temperature water as the inflowed hot water is connected to the water supply side Discharged through the mouth,
When high-temperature water flows out from the hot water supply system through the hot water supply side connection port, the blocking member is displaced to the hot water supply side connection port accordingly, thereby connecting the same amount of normal temperature water as the outflowed hot water to the water supply side connection It is an expansion tank which is made to flow in through a mouth.

The second invention is the expansion tank according to the first invention,
The water supply system is an expansion tank that supplies room temperature water from an elevated water tank installed at a high level.

3rd invention is an expansion tank as described in 1st invention, Comprising:
The water supply system supplies room temperature water by a pressure pump,
An expansion tank comprising a relief valve at any location on a pipe connecting the water supply side connection port and the pressure pump.

A fourth invention is the expansion tank according to any one of the first to third inventions,
Divided into three or more chambers that are blocked from each other by two or more blocking members;
The hot water supply side connection port is provided in the chamber on one end side, and the water supply side connection port is provided in the chamber on the other end side,
The expansion tank is characterized in that a fluid is sealed in each chamber between the one end side chamber and the other end side chamber.

A fifth invention is the expansion tank according to any one of the first to fourth inventions,
The blocking member is an expansion tank characterized in that the periphery is a film body joined to the inner periphery of the expansion tank.

A sixth invention is the expansion tank according to any one of the first to fifth inventions,
The expansion tank has a cylindrical shape, and the blocking member is a piston.

A seventh invention is the expansion tank according to any one of the first to sixth inventions,
A first tank connected to the hot water supply system and a second tank connected to the water supply system;
Each of the first and second tanks is partitioned into a plurality of chambers that are blocked from each other by a displaceable blocking member.
The hot water supply side connection port is provided in the first chamber which is any one of the plurality of chambers of the first tank;
The water supply side connection port is provided in a second chamber which is one of a plurality of chambers of the second tank;
A third chamber that is any chamber other than the first chamber of the first tank, and a fourth chamber that is any chamber other than the second chamber of the second tank; It is an expansion tank characterized by being connected.

The eighth invention is the expansion tank according to the seventh invention,
The expansion tank is characterized in that the third chamber of the first tank and the fourth chamber of the second tank are connected via another tank.

A ninth invention is a water supply system including an elevated water tank that is installed at a high level and stores room temperature water, and a water supply pipe that supplies room temperature water from the elevated water tank,
Hot water generating means for heating normal temperature water supplied from the water supply pipe, a hot water storage tank for storing high temperature water generated by the hot water generating means, and hot water supply for supplying hot water to a hot water supply port where hot water is used A hot water supply system including piping,
A water supply side connection port connected to the water supply system;
A hot water supply side connection port connected to the hot water supply system;
A displaceable blocking member that blocks the water supply side connection port and the hot water supply side connection port so as not to communicate with each other inside,
The expansion tank is
When hot water flows in from the hot water supply system through the hot water supply side connection port, the blocking member is displaced to the water supply side connection port side in response to this, so that the same amount of normal temperature water as the inflowed hot water is connected to the water supply side Discharged through the mouth,
When high-temperature water flows out from the hot water supply system through the hot water supply side connection port, the blocking member is displaced to the hot water supply side connection port accordingly, thereby connecting the same amount of normal temperature water as the outflowed hot water to the water supply side connection It is a hot water supply system characterized by flowing in through a mouth.

A tenth aspect of the present invention is a water supply system including a pressure pump that supplies water by pressurizing normal temperature water, and a water supply pipe that supplies normal temperature water by the pressure pump.
Hot water is supplied to the hot water generating means for heating the normal temperature water supplied from the water supply pipe, the hot water storage tank for storing the high temperature water generated by the hot water generating means, and the hot water supply port where the high temperature water is used. A hot water supply system including a hot water supply pipe,
A water supply side connection port connected to the water supply system;
A hot water supply side connection port connected to the hot water supply system;
An expansion tank including a blocking member that blocks the water supply side connection port and the hot water supply side connection port so as not to communicate with each other inside,
The expansion tank is
When hot water flows in from the hot water supply system through the hot water supply side connection port, the blocking member is displaced to the water supply side connection port side in response to this, so that the same amount of normal temperature water as the inflowed hot water is connected to the water supply side Discharged through the mouth,
When high-temperature water flows out from the hot water supply system through the hot water supply side connection port, the blocking member is displaced to the hot water supply side connection port accordingly, thereby connecting the same amount of normal temperature water as the outflowed hot water to the water supply side connection It is a hot water supply system characterized by flowing in through a mouth.

  According to the present invention, it is possible to provide an expansion tank capable of balancing the pressure in the hot water supply pipe and the pressure in the water supply pipe regardless of the hot water temperature, and a hot water supply system using the expansion tank.

  FIG. 1 is an overall configuration diagram of a hot water supply system 2 including an expansion tank 1 according to an embodiment of the present invention. As shown in the figure, the hot water supply system 2 includes an expansion tank 1, a water supply system, and a hot water supply system, and the water supply system includes an elevated water tank 21, a pumping pipe 22, and a water supply pipe 23. , A hot water tank 31, hot water generating means 32, and a hot water supply pipe 33.

  FIG. 2 is an enlarged view of the expansion tank 1. The expansion tank 1 is for absorbing expansion and contraction due to temperature change of hot water, and is constituted by a tank 1a and a tank 1b, a hot water supply side connection port 11, a water supply side connection port 12, blocking members 13a and 13b, and the like. .

  The tank 1a is divided into a fluid chamber 14a and a high-temperature water chamber 15 by a blocking member 13a. A hot water supply side connection port 11 is provided in the high temperature water chamber 15, and is connected to the hot water storage tank 31 through the first expansion pipe 41.

  Similarly to the tank 1a, the tank 1b is divided into a fluid chamber 14a and a room temperature water chamber 16 by a blocking member 13b. A water supply side connection port 12 is provided in the room temperature water chamber 16 and is connected to the water supply pipe 23 via the second expansion pipe 42.

  A fluid which is a liquid such as water or a gas such as air is sealed in the fluid chamber 14a and the fluid chamber 14b. Moreover, the fluid chamber 14a and the fluid chamber 14b are connected by the connection piping 17, and the fluid of the fluid chamber 14a and the fluid of the fluid chamber 14b can move mutually.

  The blocking members 13a and 13b are made of a deformable material such as rubber, and can be deformed in response to the inflow / outflow of water into the high temperature water chamber 15 and the normal temperature water chamber 16 (“displaceable in claims”) ”).

  The elevated water tank 21 is provided at a higher level than the hot water supply port 34 of the hot water supply system (for example, the roof of a building including the hot water supply system 2), and receives and stores room temperature water via the pumping pipe 22. Then, normal temperature water is supplied to the hot water tank 31 through the water supply pipe 23.

  The water supply pipe 23 is provided with a check valve 24 that prevents a back flow from the hot water tank 31. The water supply pipe 23 branches and supplies normal temperature water to the hot water supply port 34 through the branch pipes 25a and 25b. Further, the water supply pipe 23 is provided with an on-off valve 26 for stopping water supply at the time of repair or maintenance.

  The hot water generating means 32 is, for example, a heater, a heat pump, a gas water heater, or the like, and generates hot water by heating normal temperature water supplied and stored in the hot water tank 31. In FIG. 1, the hot water generation means 32 is attached inside the hot water tank 31, but may be installed outside the hot water tank 31. The high-temperature water stored in the hot water storage tank 31 is supplied to a hot water supply port 34 (for example, a hot water tap or a shower) through a hot water supply pipe 33. The user of the hot water adjusts the mixing ratio of the normal temperature water supplied via the branch pipes 25a and 25b and the high temperature water supplied via the hot water supply pipe 33 at the hot water supply ports 34a and 34b using the mixing valves 35a and 35b. By doing so, the temperature can be adjusted and used.

  The safety valve 36 is a valve that opens when the pressure in the hot water tank 31 exceeds a predetermined value and discharges the high-temperature water stored in the hot water tank 31 or the like to lower the pressure in the hot water tank 31 to a predetermined value. .

Next, the operation of the expansion tank 1 will be described.
By being heated by the hot water generating means 32, the temperature of the hot water stored in the hot water tank 31 is increased. As a result, the pressure in the hot water supply system increases, so that the hot water in the hot water storage tank 31 flows into the hot water chamber 15 of the expansion tank 1 from the hot water supply side connection port 11 via the first expansion pipe 41. Accordingly, the blocking member 13a is displaced in the direction in which the high temperature water chamber 15 expands, that is, in the direction in which the fluid chamber 14a contracts. Further, as the blocking member 13a is displaced, the fluid in the fluid chamber 14a flows out to the fluid chamber 14b via the connecting pipe 17, and the blocking member 13b also expands the fluid chamber 14b, that is, the room temperature water chamber 16. Is displaced in the direction of contraction. Thereby, the normal temperature water in the normal temperature water chamber 16 flows out from the water supply side connection port 12 and is sent to the water supply pipe 23 through the second expansion pipe 42.

  On the other hand, when the temperature of the hot water stored in the hot water storage tank 31 is reduced by radiating heat to the building or the outside air, the hot water contracts and the pressure in the hot water supply system is reduced. For this reason, the high temperature water in the high temperature water chamber 15 of the expansion tank 1 flows out from the hot water supply side connection port 11 and is sent to the hot water storage tank 31 through the first expansion pipe 41. Accordingly, the blocking member 13a is displaced in the direction in which the high temperature water chamber 15 contracts, that is, in the direction in which the fluid chamber 14a expands. Further, when the blocking member 13a is displaced, the fluid in the fluid chamber 14b flows into the fluid chamber 14a via the connecting pipe 17, and accordingly, the blocking member 13b moves in the direction in which the fluid chamber 14b contracts, that is, the room temperature water chamber. 16 is displaced in the direction of expansion. For this reason, the normal temperature water in the water supply pipe 23 flows into the normal temperature water chamber 16 of the expansion tank 1 from the water supply side connection port 12 through the second expansion pipe 42.

  Since the normal temperature water chamber 16 is connected to the water supply pipe 23 via the second expansion pipe 42, the pressure in the normal temperature water chamber 16 is equal to the pressure in the water supply pipe 23 provided by the elevated water tank 21. Moreover, the high temperature water chamber 15 is equal to the pressure of the room temperature water chamber 16 by the displacement of the blocking members 13a and 13b. That is, the pressure in the water supply pipe 23, the pressure in the normal temperature water chamber 16, and the pressure in the high temperature water chamber 15 are always equal.

  FIG. 3 shows an expansion tank 300 which is another embodiment of the expansion tank according to the present invention. As shown in the figure, the expansion tank 300 may be constituted by three or more tanks by adding another tank 301c on the connecting pipe 317 or the like.

  FIG. 4 shows an expansion tank 400 which is another embodiment of the expansion tank according to the present invention. As shown in the figure, the blocking members 413a and 413b may be pistons that are slidable inside the tank 401a and the tank 401b configured in a cylindrical shape. As the piston moves in the tanks 401a and 401b, hot water in the hot water supply system and normal temperature water in the water supply system flow in and out from the expansion tank 400.

  FIG. 5 shows an expansion tank 500 which is another embodiment of the expansion tank according to the present invention. As shown in the figure, the expansion tank 500 is constituted by one tank, and a blocking member 513a and a blocking member 513b are provided in the expansion tank 500 so as to be separated from each other. The tank 500 is divided into three chambers by a blocking member 513a and a blocking member 513b, but the hot water chamber 515 on one end side (right side in the drawing) is provided with a hot water supply side connection port 511 and the other end side (see FIG. (Middle left side) The room temperature water chamber 516 is provided with a water supply side connection port 512. The central fluid chamber 514 partitioned by the blocking members 513a and 513b is filled with a fluid such as a liquid such as water or a gas such as air.

  FIG. 6 shows an expansion tank 600 which is another embodiment of the expansion tank according to the present invention. As shown in the figure, the expansion tank 600 is constituted by one tank, and the expansion tank 600 is provided with a hot water supply side connection port 611 and a water supply side connection port 612, and a hot water supply side connection port 611 and a water supply side connection port 612. Is provided in the expansion tank 600 so as not to communicate with each other, and the expansion tank 600 is partitioned into two chambers. Of these two chambers, the room in which the hot water supply side connection port 611 is provided is the high temperature water chamber 615, and the room in which the water supply side connection port 612 is provided is the room temperature water chamber 616.

  FIG. 7 shows an expansion tank 700 which is another embodiment of the expansion tank according to the present invention. As shown in the figure, the expansion tank 700 may be configured to connect two or more tanks in parallel. The tanks 701a and 701b include hot water supply side connection ports 711a and 711b, water supply side connection ports 712a and 712b, and blocking members 713a and 713b, respectively. The interiors of the tanks 701a and 701b are divided into high-temperature water chambers 715a and 715b and normal-temperature water chambers 716a and 716b by blocking members 713a and 713b, respectively.

  In addition, the connection method of a tank is not restricted to said example, For example, as shown in FIG. 8, it is good also as a structure which mixed series and parallel.

  As described above, according to the expansion tank 1 of the present embodiment, the volume change of the high-temperature water in the hot water storage tank 31 is changed to the high-temperature water chambers 15, 315, 415, 515, 615, 715 and the room temperature water chamber 16, Absorption can be achieved by changing the capacitance of 316, 416, 516, 616, 716. Thereby, even if the volume of the high temperature water in the hot water storage tank 31 changes, the pressure of the hot water supply system and the pressure of the water supply system can be kept equal. For example, since the room temperature water chamber 16 of the expansion tank 1 is connected to the water supply pipe 23, the pressure in the room temperature water chamber 16 is equal to the pressure in the water supply pipe 23 provided by the elevated water tank 21. Further, in the expansion tank 1, the pressure in the normal temperature water chamber 16 and the pressure in the high temperature water chamber 15 are balanced by the displacement of the blocking member 13. Furthermore, since the high temperature water chamber 15 is connected to the hot water storage tank 21, the pressure in the high temperature water chamber 15 is equal to the pressure in the hot water supply system. Thereby, the pressure of the hot water supply system and the pressure of the water supply system can be made equal.

  Since the pressure of the hot water supply system and the pressure of the water supply system are equal, when the user mixes and uses high temperature water and normal temperature water at the hot water supply port 34, the mixing ratio of the high temperature water and normal temperature water if the respective openings are constant. Therefore, the temperature of the hot water at the hot water supply port 34 can be kept constant.

  Moreover, since the hot water supply pipe is kept sealed, it is possible to prevent air from being mixed into the hot water supply pipe, and to prevent aging such as rust in the pipe.

  At the moment when the hot water supply port 34 is opened, a rapid pressure change generated in the hot water supply port 34 is transmitted as shock waves in the hot water supply pipe 33 and the hot water storage tank 31. In the above embodiment, the shock wave is provided by including the expansion tank 1. Propagates to the elevated water tank 21 through the second expansion pipe 42 and the water supply pipe 23. Since the elevated water tank 21 is open to the atmosphere, this shock wave can be diverged.

  Moreover, if the shielding member 13a and the shielding member 13b are provided as in the embodiment shown in FIG. 2 and a gas such as air is sealed between them, this shock wave can be absorbed.

  Furthermore, if the expansion tank 1 includes fluid chambers 14, 314, 414, 514, 614, 714 (hereinafter referred to as fluid chamber 14) as in the embodiment shown in FIG. Since the normal temperature water is separated from the normal temperature water by the fluid such as the fluid chamber 14, heat exchange between the high temperature water and the normal temperature water can be prevented, and heat dissipation loss of the hot water supply system can be reduced.

  Further, when the fluid chamber 14 or the like is provided as in the embodiment shown in FIG. 2, the on-off valve 26 is closed and cannot be discharged from the room temperature water chamber by filling the fluid chamber 14 or the like of the expansion tank 1 with gas. Even if the hot water in the hot water storage tank 31 expands in this state, the expansion of the hot water can be absorbed to some extent by the contraction of the gas. For this reason, the set pressure of the safety valve 36 provided in the hot water tank 31 can be given a margin.

  FIG. 9 shows another embodiment of the hot water supply system 902. In the embodiment shown in the figure, the hot water supply system 2 is configured to supply water by a pressure pump 27 instead of the elevated water tank 21. The pressurizing pump 27 is provided on the water supply pipe 23 and pressurizes the room temperature water to supply the hot water storage tank 31 and the hot water supply port 34. A relief valve 28 is provided on the second expansion pipe 42, and normal temperature water in the second expansion pipe 42 is discharged when the pressure exceeds a predetermined pressure. When the pressure in the hot water storage tank 31 decreases, room temperature water is supplied from the pressurizing pump 27 to the expansion tank 1 via the second expansion pipe, but when the pressure in the hot water storage tank 31 increases, the expansion tank 1 A regulating valve 29 may be provided to prevent normal temperature water from being sent in the direction of the pressurizing pump 27 and to be discharged at the relief valve 28. Further, the expansion tank 1 may have any of the configurations shown in FIGS. 2 to 8, but the case of the configuration shown in FIG. 2 will be described below.

  Also in the embodiment shown in FIG. 9, as in the embodiment shown in FIG. 1, when the pressure in the hot water supply system increases, the hot water in the hot water storage tank 31 passes through the hot water supply side connection port 11 and the first expansion pipe 41. The blocking member 13a moves in the direction in which the high temperature water chamber 15 expands, that is, the direction in which the fluid chamber 14a contracts. Further, as the blocking member 13a moves, the fluid in the fluid chamber 14a flows out to the fluid chamber 14b through the connecting pipe 17, and the blocking member 13b also expands the fluid chamber 14b, that is, the room temperature water chamber 16 Moves in the direction of contraction. Thereby, the normal temperature water in the normal temperature water chamber 16 flows out from the water supply side connection port 12 and is discharged from the relief valve 28 through the second expansion pipe 42.

  On the other hand, when the pressure in the hot water supply system decreases, the high temperature water in the high temperature water chamber 15 flows out of the hot water supply side connection port 11 and is sent to the hot water storage tank 31 through the first expansion pipe 41. Accordingly, the blocking member 13a moves in the direction in which the high temperature water chamber 15 contracts, that is, in the direction in which the fluid chamber 14a expands. Further, as the blocking member 13a moves, the fluid in the fluid chamber 14b flows into the fluid chamber 14a through the connecting pipe 17, and the blocking member 13b also contracts in the fluid chamber 14b, that is, the room temperature water chamber 16. Moves in the direction of expansion. For this reason, the normal temperature water in the water supply pipe 23 flows into the normal temperature water chamber 16 of the expansion tank 1 from the water supply side connection port 12 through the second expansion pipe 42.

  As described above, according to the hot water supply system 902 of the present embodiment, even when water is supplied by the pressure pump 27 instead of the elevated water tank 21, the volume change of the hot water in the hot water tank 31 is changed to the high temperature of the expansion tank 1. Absorption can be achieved by changing the capacity of the water chambers 15, 315, 415, 515, 615, 715 and the room temperature water chambers 16, 316, 416, 516, 616, 716. Thereby, even if the volume of the high temperature water in the hot water storage tank 31 changes, the pressure of the hot water supply system and the pressure of the water supply system can be kept equal. For example, since the room temperature water chamber 16 of the expansion tank 1 is connected to the water supply pipe 23, the pressure in the room temperature water chamber 16 is equal to the pressure in the water supply pipe 23 provided by the elevated water tank 21. Further, in the expansion tank 1, the pressure in the normal temperature water chamber 16 and the pressure in the high temperature water chamber 15 are balanced by the displacement of the blocking member 13. Furthermore, since the high temperature water chamber 15 is connected to the hot water storage tank 21, the pressure in the high temperature water chamber 15 is equal to the pressure in the hot water supply system. Thereby, the pressure of the hot water supply system and the pressure of the water supply system can be made equal.

  Since the pressure of the hot water supply system and the pressure of the water supply system are equal, when the user mixes and uses high temperature water and normal temperature water at the hot water supply port 34, the mixing ratio of the high temperature water and normal temperature water if the respective openings are constant. Therefore, the temperature of the hot water at the hot water supply port 34 can be kept constant.

  Moreover, since the hot water supply pipe is kept sealed, it is possible to prevent air from being mixed into the hot water supply pipe, and to prevent aging such as rust in the pipe.

  By the way, at the moment when the hot water supply port 34 is opened, an abrupt pressure change generated in the hot water supply port 34 is transmitted as a shock wave through the hot water supply pipe 33 and the hot water storage tank 31, but is blocked as in the embodiment shown in FIG. If a member 13a and a blocking member 13b are provided and a gas such as air is sealed between them as a fluid, this shock wave can be absorbed.

  Furthermore, if the expansion tank 1 includes fluid chambers 14, 314, 414, 514, 614, 714 (hereinafter referred to as fluid chamber 14) as in the embodiment shown in FIG. Since the normal temperature water is separated from the normal temperature water by the fluid such as the fluid chamber 14, heat exchange between the high temperature water and the normal temperature water can be prevented, and heat dissipation loss of the hot water supply system can be reduced.

  Further, when the fluid chamber 14 or the like is provided as in the embodiment shown in FIG. 2, the on-off valve 26 is closed and cannot be discharged from the room temperature water chamber by filling the fluid chamber 14 or the like of the expansion tank 1 with gas. Even if the hot water in the hot water storage tank 31 expands in this state, the expansion of the hot water can be absorbed to some extent by the contraction of the gas. For this reason, the set pressure of the safety valve 36 provided in the hot water tank 31 can be given a margin.

  In addition, the description of the above embodiment is for making an understanding of this invention easy, and does not limit this invention. It goes without saying that the present invention can be changed and improved without departing from the gist thereof, and that the present invention includes equivalents thereof.

1 is an overall configuration diagram of a hot water supply system 2 including an expansion tank 1 according to an embodiment of the present invention. 1 is an overall configuration diagram of an expansion tank 1. FIG. It is another whole block diagram of the expansion tank 300 comprised by three tanks. It is a whole block diagram of the expansion tank 400 whose interruption | blocking member 13 is a piston. It is a whole block diagram of the expansion tank 500 comprised by one tank. 1 is an overall configuration diagram of an expansion tank 600 configured with one tank and one blocking member 13. FIG. It is a whole block diagram of the expansion tank 700 which has a structure which connects two tanks in parallel. It is a whole block diagram of the expansion tank 700 which has the structure which connects a some tank in series and parallel. 1 is an overall configuration diagram including an expansion tank 1 of a hot water supply system 2 using a pressurizing pump 27. FIG.

Explanation of symbols

1 expansion tank, 2 hot water supply system, 11 hot water supply side connection port, 12 water supply side connection port,
13 Blocking member, 14 Fluid chamber, 15 High temperature water chamber, 16 Normal temperature water chamber, 17 Connection piping,
21 elevated tank, 22 pumping pipe, 23 water supply pipe, 24 check valve, 25 branch pipe,
26 on-off valve, 27 water supply pump, 28 relief valve, 29 regulating valve, 31 hot water storage tank,
32 hot water generating means, 33 hot water supply pipe, 34 hot water supply port, 35 mixing valve, 36 safety valve,
41 1st expansion pipe, 42 2nd expansion pipe

Claims (10)

An expansion tank used in a hot water supply system including a water supply system for supplying normal temperature water, and a hot water supply system for supplying high temperature water generated by heating normal temperature water supplied by the water supply system,
A water supply side connection port connected to the water supply system;
A hot water supply side connection port connected to the hot water supply system;
A displaceable blocking member that blocks the water supply side connection port and the hot water supply side connection port so as not to communicate with each other inside,
When hot water flows in from the hot water supply system through the hot water supply side connection port, the blocking member is displaced to the water supply side connection port side in response to this, so that the same amount of normal temperature water as the inflowed hot water is connected to the water supply side Discharged through the mouth,
When high-temperature water flows out from the hot water supply system through the hot water supply side connection port, the blocking member is displaced to the hot water supply side connection port accordingly, thereby connecting the same amount of normal temperature water as the outflowed hot water to the water supply side connection An expansion tank which is made to flow through a mouth. The expansion tank according to claim 1,
The expansion tank is characterized in that the water supply system supplies room temperature water from an elevated water tank installed at a high level. The expansion tank according to claim 1,
The water supply system supplies room temperature water by a pressure pump,
An expansion tank comprising a relief valve at any location on a pipe connecting the water supply side connection port and the pressure pump. The expansion tank according to any one of claims 1 to 3,
Divided into three or more chambers that are blocked from each other by two or more blocking members;
The hot water supply side connection port is provided in the chamber on one end side, and the water supply side connection port is provided in the chamber on the other end side,
An expansion tank, wherein a fluid is sealed in each chamber between the one end side chamber and the other end side chamber. The expansion tank according to any one of claims 1 to 4,
The expansion tank is characterized in that the blocking member is a film body whose periphery is joined to the inner periphery of the expansion tank. The expansion tank according to any one of claims 1 to 5,
The expansion tank has a cylindrical shape, and the blocking member is a piston. The expansion tank according to any one of claims 1 to 6,
A first tank connected to the hot water supply system and a second tank connected to the water supply system;
Each of the first and second tanks is partitioned into a plurality of chambers that are blocked from each other by a displaceable blocking member.
The hot water supply side connection port is provided in the first chamber which is any one of the plurality of chambers of the first tank;
The water supply side connection port is provided in a second chamber which is one of a plurality of chambers of the second tank;
A third chamber that is any chamber other than the first chamber of the first tank, and a fourth chamber that is any chamber other than the second chamber of the second tank; An expansion tank characterized by being connected. The expansion tank according to claim 7,
The expansion tank, wherein the third chamber of the first tank and the fourth chamber of the second tank are connected via another tank. A water supply system including an elevated water tank that is installed at a high level and stores room temperature water; and a water supply pipe that supplies room temperature water from the elevated water tank;
Hot water generating means for heating normal temperature water supplied from the water supply pipe, a hot water storage tank for storing high temperature water generated by the hot water generating means, and hot water supply for supplying hot water to a hot water supply port where hot water is used A hot water supply system including piping,
A water supply side connection port connected to the water supply system;
A hot water supply side connection port connected to the hot water supply system;
A displaceable blocking member that blocks the water supply side connection port and the hot water supply side connection port so as not to communicate with each other inside,
The expansion tank is
When hot water flows in from the hot water supply system through the hot water supply side connection port, the blocking member is displaced to the water supply side connection port side in response to this, so that the same amount of normal temperature water as the inflowed hot water is connected to the water supply side Discharged through the mouth,
When high-temperature water flows out from the hot water supply system through the hot water supply side connection port, the blocking member is displaced to the hot water supply side connection port accordingly, thereby connecting the same amount of normal temperature water as the outflowed hot water to the water supply side connection A hot water supply system characterized by flowing in through a mouth. A water supply system including a pressure pump for supplying water by pressurizing normal temperature water, and a water supply pipe for supplying normal temperature water by the pressure pump;
Hot water is supplied to the hot water generating means for heating the normal temperature water supplied from the water supply pipe, the hot water storage tank for storing the high temperature water generated by the hot water generating means, and the hot water supply port where the high temperature water is used. A hot water supply system including a hot water supply pipe,
A water supply side connection port connected to the water supply system;
A hot water supply side connection port connected to the hot water supply system;
An expansion tank including a blocking member that blocks the water supply side connection port and the hot water supply side connection port so as not to communicate with each other inside,
The expansion tank is
When hot water flows in from the hot water supply system through the hot water supply side connection port, the blocking member is displaced to the water supply side connection port side in response to this, so that the same amount of normal temperature water as the inflowed hot water is connected to the water supply side Discharged through the mouth,
When high-temperature water flows out from the hot water supply system through the hot water supply side connection port, the blocking member is displaced to the hot water supply side connection port accordingly, thereby connecting the same amount of normal temperature water as the outflowed hot water to the water supply side connection A hot water supply system characterized by flowing in through a mouth.

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