Method for utilizing small-sized wall-mounted hot water storage tank

Abstract

To solve the problems that when using a high water-saving faucet to conserve water, its flow rate is insufficient because it is below the minimum operating flow rate of an instantaneous water heater, the instantaneous water heater did not function, leaving only cold water available in winter, which caused physical pain, and that a water-saving faucet cannot be used to obtain hot water, and a non-water-saving faucet requires a large amount of hot water, resulting in high cost.SOLUTION: Hot water is temporarily stored in a small-sized wall-mounted hot water storage tank at an upper part of an instantaneous water heater with an operating flow rate of the instantaneous water heater, and then flowed from the hot water storage tank to a water-saving faucet at a lower part thereof, making it possible to use hot water even with the water-saving faucet. This reduces costs and eliminates physical pain in winter.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for using an external hot water storage tank that enables hot water to be supplied even from a faucet with a high water-saving rate, as a solution to the problem that only water comes out when the flow rate of an instantaneous water heater is less than the minimum operating flow rate when using a faucet with a high water-saving rate. [Background technology]

[0002] In order to reduce costs, the use of water-saving faucets is increasing in the washing areas of large kitchens, but there are problems with the use of water-saving faucets, such as storage-type water heaters and instantaneous water heaters. Storage-type water heaters have the problem that the water heater itself is large, which makes it difficult to find a place to install it, and the problem that the water temperature does not rise easily after it has been used up. Instantaneous water heaters have the problem that only cold water comes out of the faucet when the hot water flow rate is below the minimum operating flow rate, or that a faucet with a high water-saving rate cannot be used to provide hot water. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-7399 Summary of the Invention [Problem to be solved by the invention]

[0004] Of the issues we are trying to solve, the location of storage-type water heaters is physically impossible to resolve, so we will consider solving the problem of instantaneous water heaters. To provide an instantaneous hot water heater capable of supplying hot water to a faucet even when the flow rate of hot water is less than the minimum operating flow rate when a faucet with a high water-saving rate is used, thereby reducing costs and eliminating physical pain caused by manual work with cold water in winter. [Means for solving the problem]

[0005] An external small wall-mounted hot water storage tank for storing a small amount of hot water, about one or two buckets' worth, is installed on the wall above the faucet, and hot water is temporarily stored in the small wall-mounted hot water storage tank at a flow rate equal to or greater than the minimum operating flow rate of the instantaneous hot water heater, and hot water is supplied from the hot water storage tank to the faucet, making it possible to get hot water even from a faucet with a high water-saving rate that is less than the minimum operating flow rate of the instantaneous hot water heater. [Effects of the Invention]

[0006] In places where dishes are washed for long periods each day, such as in the dishwashing areas of large kitchens, water-saving faucets are often used to limit the flow rate in order to reduce costs. However, the solution is to either set the flow rate below the minimum operating flow rate of the instantaneous water heater so that only cold water comes out, or to set the flow rate above the minimum operating flow rate so that hot water can be used. However, the present invention provides hot water even with a low flow rate, which can be expected to reduce costs and eliminate the physical pain of manually working with cold water in winter, making it a very effective invention. [Brief explanation of the drawings]

[0007] [Figure 1] How to use a small wall-mounted hot water tank [Explanation of symbols]

[0008] 1. Hot water tank 2-1 Empty prevention electrode 2-2 Overflow prevention electrode 3 Temperature Sensor 3-1 Controller 4 Lid 5 Hot water on-off valve 6 Power switch 7 Hot water supply pipe 8 Outlet pipe 8-0 Tap hole 9-1 External faucet 9-2 External faucet 9-3 External faucet 10. External instantaneous water heater DETAILED DESCRIPTION OF THE INVENTION

[0009] A small wall-mounted hot water storage tank is installed on the wall located above the water-saving faucet between the external instantaneous water heater and the water-saving faucet, and hot water is stored in the small wall-mounted hot water storage tank at a flow rate equal to or higher than the minimum operating flow rate of the external instantaneous water heater, and the hot water is supplied to the external faucet with a high water-saving rate. [Example]

[0010] As shown in Figure 1, hot water is stored in the hot water storage tank (1) from an external instantaneous water heater (10), and the controller (3-1) determines the status of the power switch (6), the dead water prevention electrode (2-1), the overflow prevention electrode (2-2), and the temperature sensor (3), opens and closes the hot water supply valve (5), and adjusts the amount of hot water stored in the hot water storage tank (1).

[0011] The hot water flows from the external instantaneous water heater (10) through the hot water supply pipe (7), the hot water supply valve (5), the hot water storage tank (1), the hot water outlet (8-0), the hot water outlet pipe (8), and the external faucets (9-1), (9-2), and (9-3). The hot water storage tank (1) has a lid (4) on top to prevent the hot water from splashing when the water is poured into it.

[0012] The conditions for adding hot water to the hot water storage tank (1) are when the power switch (6) is on, the anti-air-dry electrode (2-1) in the hot water storage tank (1) is not immersed in hot water, and the temperature measured by the temperature sensor (3) is below the safe upper limit temperature to prevent users of the external faucets (9-1), (9-2), and (9-3) from getting burned, etc., the controller (3-1) judges the conditions and opens the hot water supply valve (5), and fills the hot water storage tank (1) with hot water from the external instantaneous water heater (10) at a flow rate above the minimum operating flow rate. The safe upper limit temperature can be determined arbitrarily, but a temperature of 45°C or below is considered a safe temperature to prevent burns.

[0013] The conditions for stopping the supply of hot water to the hot water storage tank (1) are when the power switch (6) is turned off, or when the overflow prevention electrode (2-2) is immersed in hot water, or when the temperature measured by the temperature sensor (3) exceeds the upper safety limit temperature. The controller (3-1) judges the condition and closes the hot water supply opening / closing valve (5) to stop the supply of hot water from the external instantaneous hot water heater (10). However, if the amount of hot water in the hot water storage tank (1) decreases, etc., the hot water supply conditions of paragraph 0012 of this specification are met and hot water is supplied.

[0014] When there is hot water in the hot water storage tank (1) and one or more of the external faucets (9-1), (9-2), and (9-3) are opened to use the hot water, the controller (3-1) determines the conditions for hot water use, and the hot water in the hot water storage tank (1) repeatedly increases and decreases, allowing the external faucets (9-1), (9-2), and (9-3) to use hot water at a stable temperature and flow rate.

[0015] Because the hot water storage tank (1) is located above the external faucets (9-1), (9-2), and (9-3), when the external faucets (9-1), (9-2), and (9-3) are opened and hot water is dispensed, the hot water flows to the external faucets (9-1), (9-2), and (9-3) even if the water-saving rate is high and the flow rate is less than the minimum operating flow rate of the external instantaneous water heater (10). When the hot water in the hot water storage tank (1) runs low, it is replenished, and hot water can be used stably at the external faucets (9-1), (9-2), and (9-3).

[0016] The hot water storage tank (1) is located above the external faucets (9-1), (9-2), and (9-3). Hot water flows from the external instantaneous water heater (10) through the hot water supply pipe (7), the hot water supply valve (5), the hot water storage tank (1), the hot water outlet (8-0), the hot water outlet pipe (8), and the external faucets (9-1), (9-2), and (9-3) in this order. When the conditions for supplying hot water to the hot water storage tank (1) are met, the hot water supply valve (5) is opened and the external instantaneous water is supplied to the hot water storage tank (1). If the hot water flows at a rate exceeding the minimum operating flow rate of the intermediate water heater (10) and does not meet the conditions for hot water supply, the hot water supply on-off valve (5) is closed, the flow of hot water into the hot water storage tank (1) is stopped, and while the hot water in the hot water storage tank (1) repeatedly increases and decreases, one or more of the external faucets (9-1), (9-2), and (9-3) are opened, so that a stable temperature and a stable water-saving flow rate flow to the external faucets (9-1), (9-2), and (9-3).

[0017] Normally, an external instantaneous water heater (10) requires about 24L (24L / min) for three hot water supply points, such as external faucets (9-1), (9-2), and (9-3). However, if an 80% water-saving faucet is used, it is possible to significantly reduce water consumption by about 5L / min for three hot water supply points. It is also possible to add more external faucets, such as (9-4), (9-5), (9-6), etc.

[0018] The hot water storage tank (1) and the external instantaneous hot water heater (10) have sufficient flow rates, so that the external faucets (9-1), (9-2), and (9-3) can be used stably.

[0019] Future challenges To ensure a safe temperature without the risk of burns, the external instantaneous water heater (10) automatically lowers the set temperature. It is also important to consider future features such as automatically lowering the water temperature by automatically mixing water.

[0020] In the event that hot water becomes unavailable due to a power outage or other malfunction, it is best to secure a bypass waterway so that water can flow to the external faucets (9-1), (9-2), and (9-3). [Industrial Applicability]

[0021] Water-saving faucets are often used to reduce costs, and by making it possible to get hot water even with instantaneous water heaters, 1. Eliminates the physical pain of direct contact with cold water in winter. 2 Hot water can be produced even with a low flow rate, saving water and reducing costs. Both advantages are expected, and there is ample potential for industrial application.

Claims

[Claim 1] The hot water storage tank (1) is located above the external faucets (9-1), (9-2), and (9-3), and the flow of hot water flows from the external instantaneous hot water heater (10) through the hot water supply pipe (7), the hot water supply valve (5), the hot water storage tank (1), the hot water outlet (8-0), the hot water outlet pipe (8), and the external faucets (9-1), (9-2), and (9-3) in this order. When the conditions for supplying hot water to the hot water storage tank (1) are met, the hot water supply valve (5) is opened and the hot water is supplied to the hot water storage tank (1) with the minimum operation of the external instantaneous hot water heater (10). This is a method for using a small wall-mounted hot water storage tank, characterized in that if the hot water flow exceeds the moving flow rate and does not meet the conditions for hot water supply, the hot water supply on-off valve (5) is closed, the flow of hot water into the hot water storage tank (1) is stopped, and while the hot water in the hot water storage tank (1) repeatedly increases and decreases, one or more of the external faucets (9-1), (9-2), and (9-3) are opened, so that a stable temperature and a stable water-saving flow rate flow to the external faucets (9-1), (9-2), and (9-3).

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