JP2008045827A - Expansion tank-less hot water supply/storage tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an expansion tank-less hot water supply/storage tank, having both a function of a hot water supply/storage tank and a function of an expansion tank, and preventing air separated in the hot water supply/storage tank from flowing into a hot water outlet pipe. <P>SOLUTION: This expansion tank-less hot water supply/storage tank 1 includes: a tank body 5 as a closed container, which has a top plate 3 and a base plate 4 provided on a cylindrical drum part 2; a hot water supply inlet pipe 6 and a hot water supply return pipe 7, which are respectively communicated with the interior of the tank body 5; a water supply and temperature rising feed pipe 8 for supplying water or supplying hot water; a hot water outlet pipe 9 and a surplus air discharge pipe 10 for discharging surplus air, which penetrate the top plate 3 with the respective lower end parts suspended from the top plate 3 and respectively communicated with the interior of the tank body 5; an expansion release pipe 11 for releasing expanded water; and a drain pipe 12 communicated with the interior of the tank body 5 from the base plate 4, wherein the lower end opening part 9a of the hot water supply outlet pipe 9 is provided at a lower position than the lower end opening part 10a of the surplus air discharge pipe 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an expansion tank-less hot water / hot water storage tank that has functions of a hot water / hot water storage tank and an expansion tank, and prevents air separated in the hot water / hot water storage tank from flowing into a hot water outlet pipe.

This type of conventional hot water / hot water storage tank generally has the following characteristics.
(1) In addition to the hot water / hot water storage tank, a separate expansion tank was provided.
(2) The air separated in the hot water / hot water storage tank also flowed into the hot water outlet pipe together with the hot water.
An example in which an expansion tank is provided is Patent Document 1, for example.
JP 2003-302106 A

The following problems can be pointed out in the conventional technology.
(1) In addition to the hot water / hot water storage tank, a space for installing an expansion tank is required.
(2) In addition to hot water and hot water storage tanks, materials, piping and installation work costs for installing the expansion tank are required.
(3) When the air and hot water separated in the hot water / expansion tank are mixed and flow into the pipe, the hot water pipe is corroded and the durability of the hot water pipe is lowered.
(4) Air is discharged from the hot water supply curan, causing hot water to splash and is dangerous.

  In view of the above situation, the present invention provides an expansion tank-less hot water / hot water storage tank that has functions of a hot water / hot water storage tank and an expansion tank, and prevents air separated in the hot water / hot water storage tank from flowing into the hot water outlet pipe. For the purpose.

In order to solve the above problems, the present invention provides the following configurations.
The invention according to claim 1 is an airtight container-like tank body provided with a top plate and a bottom plate in a cylindrical body,
A hot-water supply inlet pipe, a hot-water supply return pipe, and a hot-water supply / temperature-raising feed pipe for supplying water or hot water;
A hot water supply outlet pipe penetrating the top plate and having a lower end portion suspended from the top plate to communicate with the inside of the tank body, an excess air discharge pipe for discharging excess air, and escaped expanded water An expansion relief tube for,
An expansion tankless hot water storage / storage tank provided with a drain pipe communicated from the bottom plate into the tank body,
The lower end opening of the hot water outlet pipe is provided at a position below the lower end opening of the surplus air discharge pipe,
An expansion characterized in that an air chamber is formed in the tank body above the lower end opening of the surplus air discharge pipe when sufficient water or hot water is supplied into the tank body. It provides tankless hot water storage and hot water storage tanks.

  2. The expansion tank-less hot water / hot water storage tank according to claim 1, wherein a tip opening of the hot water inlet pipe is provided at a position lower than a lower end opening of the surplus air discharge pipe. Is to provide.

  According to a third aspect of the present invention, the tip end of the hot water supply inlet pipe has a tapered portion that gradually increases in diameter toward the tip side, and is connected to the tip portion of the tapered portion, and is bent upward, An expansion tank-less hot water / hot water storage tank according to claim 1 or 2, further comprising an inlet curved pipe formed so that the portion opens upward.

  According to the first aspect of the present invention, a sealed container-like tank main body having a top plate and a bottom plate in a cylindrical body, a hot-water supply inlet pipe and a hot-water supply return pipe communicated with each other in the tank main body. A hot and cold water supply pipe for supplying water or hot water, a hot water supply outlet pipe penetrating the top plate, and having a lower end portion suspended from the top plate and communicating with the tank body, excess air An expansion tankless hot water / hot water storage tank provided with an excess air discharge pipe for discharging water, an expansion escape pipe for escaping the expanded water, and a drain pipe communicating with the inside of the tank body from the bottom plate. When the lower end opening of the hot water outlet pipe is provided at a position lower than the lower end opening of the surplus air discharge pipe, when the water or hot water is sufficiently supplied into the tank body, Empty in the tank body above the bottom opening An expansion tank-less hot water / hot water storage tank configured to form a chamber is provided, so it has the functions of a hot water / hot water storage tank and an expansion tank so that air separated by the hot water / hot water storage tank does not flow into the hot water outlet pipe. It is possible to provide an expanded tankless hot water storage / storage tank.

More specifically, the following effects can be expected.
(1) By providing the air chamber in the upper part of the tank, it is possible to prevent the hot water from being discharged to the outside by absorbing the amount of hot water in the tank that has been heated and expanded by compressing the air chamber.
(2) By integrating the hot water / hot water storage tank and the expansion tank, the installation space can be reduced and the construction cost can be reduced.
(3) Waste is eliminated by preventing the expanded hot water from being discharged to the outside.
(4) The separated air can be prevented from entering the hot water supply outlet pipe.
(5) By preventing the air separated inside the tank from flowing into the hot water outlet pipe, corrosion of the hot water pipe can be prevented and the durability of the hot water pipe can be increased, resulting in a longer hot water pipe replacement cycle. The cost of replacement can be reduced.
(6) Since no air is emitted from the hot water supply curan, the hot water does not repel and becomes safe.

  According to the invention described in claim 2, since the tip opening of the hot water inlet pipe is provided at a position lower than the lower end opening of the surplus air discharge pipe, in addition to the effect of the invention of claim 1, the hot water inlet Since hot water flowing in from the opening at the tip of the tube does not directly contact the air in the air chamber, mixing of air can be prevented.

According to invention of Claim 3, the front-end | tip part of the said hot water supply inlet pipe is connected to the taper part gradually diameter-expanded toward the front end side, the front-end | tip part of the said taper part, and bends upwards, In addition to the effects of the invention according to claim 1 or 2, the tip portion is provided with an inlet curved pipe formed so as to open upward, and in addition to the effect of the invention according to claim 1, Henry's law is achieved by slowing the flow velocity by the tapered portion. Accordingly, air can be easily separated from the hot water.
In addition, by opening the tip opening of the bent curved pipe upward, it uses the difference in specific gravity between hot water and air to promote air floating, making it easier for air to collect at the top of the tank, and hot water and air inside the tank. Can be prevented from mixing.

Hereinafter, embodiments of the present invention will be described with reference to the drawings showing examples.
In FIG. 1, reference numeral 1 denotes an expansion tankless hot water / hot water storage tank of the present invention. The expansion tankless hot water / hot water storage tank 1 is a dome-shaped top plate that is gently curvedly formed in a cylindrical body 2. 3 and a tank body 5 in the form of a sealed container provided with an inverted dome-shaped bottom plate 4 that is gently curved, a hot water supply inlet pipe 6 that penetrates the body 2 in the horizontal direction and communicates with the tank body 5, and hot water The return pipe 7 and the water supply / temperature rising feed pipe 8 for supplying water or hot water and the top plate 3 are vertically penetrated, and the lower end portion is suspended from the top plate 3 so as to communicate with the tank body 5. The hot water outlet pipe 9, the surplus air discharge pipe 10 for discharging surplus air, the expansion escape pipe 11 for escaping the water expanded above a predetermined pressure, and the bottom plate 4 through the center of the bottom plate 4 in the vertical direction. 5 is provided with a drain pipe 12 communicated with the inside.

  In the expansion tankless hot water supply / hot water storage tank 1, the lower end opening 9 a of the hot water supply outlet pipe 9 is provided at a position lower than the lower end opening 10 a of the surplus air discharge pipe 10 by a step D <b> 1. The lower end opening 11 a of the expansion escape pipe 11 is also provided at a position lower than the lower end opening 10 a of the surplus air discharge pipe 10. The level difference D1 is set to a level level where air in the air chamber A, which will be described later, does not enter the hot water supply outlet pipe 9.

  Furthermore, the front end opening 6a of the hot water supply inlet pipe 6 (opening upward as will be described later) is the lower end opening 10a of the surplus air discharge pipe 10 (the water surface WL at the time of full water is substantially the same height). The height position H1 of the tip opening 6a of the hot water supply inlet pipe 6 is lower than the lower opening 9a of the hot water outlet pipe 9 and the lower end opening 11a of the expansion escape pipe 11 than the step D2. The lower position is set. The level difference D2 is set to a level difference where hot water in the hot water supply inlet pipe 6 does not mix air in the air chamber A.

  Furthermore, the distal end portion of the hot water supply inlet pipe 6 is connected to the tapered portion 13 that gradually increases in diameter toward the distal end side, and the distal end portion of the tapered portion 13, and is bent upward so that the distal end opening portion 6 a is formed. And an inlet curved pipe 14 formed so as to open upward.

The hot water supply return pipe 7 is provided in a horizontal direction at an upper position of the body portion 2 of the tank body 5, and the height position H2 of the tip opening 7a of the hot water return pipe 7 (H2 is the upper end of the tip opening 7a). Is provided at a position below the lower end opening 9 a of the hot water supply outlet pipe 9 and the lower end opening 11 a of the expansion escape pipe 11.
The water supply / temperature-raising feed pipe 8 is provided in the horizontal direction at the lower end of the body 2 of the tank body 5. The water supply / temperature rising feed pipe 8 can supply water or hot water.

Thus, in the expansion tankless hot water supply / hot water storage tank 1, when water is supplied from the water supply / temperature raising feed pipe 8 while the tank body 5 is empty, the tank is opened from the lower end opening 10 a of the surplus air discharge pipe 10. When the surplus air in the main body 5 is discharged and water is supplied to the position of the lower end opening 10a of the surplus air discharge pipe 10, the lower end opening 10a is blocked with water, and it becomes difficult to discharge air, and water supply is stopped.
As a result, an air chamber A is formed in the tank body 5 above the lower end opening 10a of the surplus air discharge pipe 10, and a portion below the lower end opening 10a of the surplus air discharge pipe 10 is filled with water W. As shown, the water surface WL is formed at the position of the lower end opening 10 a of the surplus air discharge pipe 10. The expansion relief pipe 11 is closed at a pressure equal to or higher than the water supply pressure, and water does not leak from the expansion relief pipe 11 due to the water supply.

In this state, when hot water is supplied from the hot water inlet pipe 6 communicated with an external boiler (not shown) or the like, the flow rate of the hot water is slowed down at the tapered portion 13, and the hot water is directed upward at the inlet curved pipe 14. And flows into the tank body 5 from the tip opening 6a. At this time, the taper portion 13 slows the flow rate of the hot water, so that the pressure of the hot water is lowered and air is easily separated from the hot water according to Henry's law. By separating the air, corrosion of the hot water supply outlet pipe 9 and the like can be prevented.
In addition, since the distal end opening 6a of the inlet curved pipe 14 is opened upward, air having a specific gravity that is lighter than that of hot water can easily float above the tank body 5 first. Air can be prevented from mixing.
The temperature of the hot water in the tank body 5 rises due to the hot water supply, and the amount of hot water increased by the hot water supply is returned from the hot water return pipe 7 to an external boiler or the like. When a pressure equal to or higher than a predetermined pressure is applied to the tank body 5 by the hot water supply, the valve (not shown) of the expansion escape pipe 11 is opened, and the expanded hot water can be released from the expansion escape pipe 11.

  When the hot water in the tank body 5 is used through the hot water supply outlet pipe 9, the inside of the tank body 5 is depressurized, and an amount of water corresponding to the used hot water is supplied into the tank body 5 from the water supply / temperature-raising feed pipe 8. Is done.

It is front sectional drawing of the expansion tankless hot water supply / hot water storage tank by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Expansion tank-less hot water supply / storage tank 2 Body part 3 Top plate 4 Bottom plate 5 Tank main body 6 Hot water supply inlet pipe 6a Tip opening 7 Hot water return pipe 8 Water supply / temperature rising feed pipe 9 Hot water outlet pipe 9a Lower end opening 10 Excess air discharge Pipe 10a Lower end opening 11 Expansion escape pipe 12 Drain pipe 13 Taper part 14 Inlet curved pipe A Air chamber W Water

Claims (3)

A sealed container-like tank body provided with a top plate and a bottom plate in a cylindrical body,
A hot-water supply inlet pipe, a hot-water supply return pipe, and a hot-water supply / temperature-raising feed pipe for supplying water or hot water;
A hot water supply outlet pipe penetrating the top plate and having a lower end portion suspended from the top plate to communicate with the inside of the tank body, an excess air discharge pipe for discharging excess air, and escaped expanded water An expansion relief tube for,
An expansion tankless hot water storage / storage tank provided with a drain pipe communicated from the bottom plate into the tank body,
The lower end opening of the hot water outlet pipe is provided at a position below the lower end opening of the surplus air discharge pipe,
An expansion characterized in that an air chamber is formed in the tank body above the lower end opening of the surplus air discharge pipe when sufficient water or hot water is supplied into the tank body. Tankless hot water storage tank.   The expansion tank-less hot water / hot water storage tank according to claim 1, wherein a front end opening of the hot water inlet pipe is provided at a position lower than a lower end opening of the surplus air discharge pipe. The distal end portion of the hot water inlet pipe is connected to the tapered portion that gradually increases in diameter toward the distal end side, and the distal end portion of the tapered portion, bends upward, and the distal end opening opens upward. The expansion tank-less hot water / hot water storage tank according to claim 1, further comprising an inlet curved pipe formed as described above.

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