JPH0710647U - Water heater with flow controller - Google Patents

Abstract

(57) [Abstract] [Purpose] A water heater that directly receives water pressure is intended to make the water supply flow rate constant due to changes in water pressure. [Configuration] In the flow path from the water inlet of the water heater to the heat exchange section,
An outer cylinder 9 incorporating a flow rate adjusting mechanism is attached, and an inner cylinder 7 provided with a valve 5 and a spring 4 is attached inside the outer cylinder 9 with a small gap 8 therebetween. The valve 5 is provided with a through hole 5a through which the water from the water supply inlet 2 passes into the inner cylinder 7, and the inner cylinder 7 is provided with a through hole 6 through which the water of the inner cylinder 7 passes into the small gap 8. The valve 5 that moves forward and backward by the water pressure against the spring 4 changes the opening area of the passage hole 6 to keep the flow rate of water constant regardless of the change in water pressure.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water heater having a water inlet and a hot water outlet that are connected to a heat exchanger and that directly receives water pressure.

[0002]

[Prior art]

 It is necessary to install a flow rate controller that responds to changes in water pressure to water heaters that are directly connected to water, and the most popular one is as shown in Fig. 3, which is an elastic O type that deforms due to water pressure. In some cases, a ring a (rubber or silicone resin) is provided in a housing b that allows water to pass therethrough, and the O-shaped ring a is deformed due to the difference in water pressure to change the cross section of water flow, thereby realizing a constant flow rate.

[0003]

[Problems to be solved by the device]

 In the water supply business, due to various factors such as the distance from the water source, the height of the water source, the amount used, etc., the water pressure when supplied to consumers is extremely variable, and in areas with high water pressure, It was difficult to expect 100% of the conventional flow rate regulator using an O-ring, and it was impossible to avoid variations in flow rate.

[0004]

[Means for Solving the Problems]

 The present invention relates to a water heater having a water supply inlet 2 and a hot water supply outlet 3 which are connected to the heat exchanger 1, and has a through hole 5a through which a water flow from the water supply inlet 2 passes, and a spring is provided against water pressure. 4, a valve 5 that moves back and forth in the inner cylinder 7, a passage hole 6 that serves as an outlet for the water that flows into the inner cylinder 7 and the passage area of the water changes as the valve 5 moves forward and backward, and a small hole outside the inner cylinder 7. A flow controller 10 is constituted by an outer cylinder 9 provided with a gap 8 and the flow controller 10 is attached to the water inlet 2 to provide a water heater with a flow controller.

[0005]

[Action]

 When water supply to the water supply inlet 2 equipped with the flow rate adjuster 10 is started, tap water to be supplied enters the inner cylinder 7 through the through hole 5 a of the valve 5, passes through the through hole 6 of the inner cylinder 7 and the outer cylinder 9. It flows out into the small gap 8. When the water pressure is strong, the valve 5 is pressed against the force of the spring 4, and the opening area of the passage hole 6 of the inner cylinder 7 is reduced by the valve 5, so that the water pressure can be adjusted accordingly. It has the effect of adjusting the flow rate by changing the passing area of water.

[0006]

【Example】

 The structure will be described below with reference to the drawings showing the embodiments. Reference numeral 1 is a heat exchanger incorporated in the water heater, 2 is a water inlet connected to the heat exchanger 1, and 3 is a hot water outlet also connected to the heat exchanger 1. During the period from the water supply inlet 2 to the hot water supply outlet 3 via the heat exchanger 1, it is heated by a burner 11 described later and tapped.

Reference numeral 10 denotes a flow rate regulator attached to the water supply inlet 2 as an independent member. The flow rate regulator 10 has a spring 4, a valve 5 having a through hole 5a, and an inner cylinder 7 for accommodating the spring 4 and the valve 5. There is an outer cylinder 9 which forms an outer shell outside the inner cylinder 7, and the valve 5 moves forward and backward in the inner cylinder 7 due to the balance between the water pressure and the spring 4. The inner cylinder 7 is provided with a passage hole 6 having a constant passage area which serves as an outlet for the inflowing water, and the passage area of the passage hole 6 is changed to a large or small size by moving the valve 5 forward and backward. By reducing the passage area, the amount of water passing is kept constant regardless of water pressure. Reference numeral 8 denotes a small gap provided between the inner cylinder 7 and the outer cylinder 9, and the water that has passed through the passage hole 6 flows through the small gap 8 to the heat exchanger 1 side.

Reference numeral 11 is a burner for heating the heat exchanger 1 to supply hot water, 12 is an exhaust passage communicating with the heat exchanger 1, and 13 is an exhaust outlet for outputting exhaust from the exhaust passage 12 to the outside of the frame. . Further, the outer cylinder 9 forming the outer shell of the flow rate adjuster 10 is divided into two and is provided with a sub outer cylinder 9a which is screwed into the outlet side of the outer cylinder 9, and is partitioned between the outer cylinder 9 and the sub outer cylinder 9a. The slope 14 is provided, the partition plate 14 holds the inner cylinder 7 between the partition plate 14 and the outer cylinder 9, and prevents the valve 5 and the spring 4 in the inner cylinder 7 from coming off. Further, the partition plate 14 is provided with a second through hole 14a facing the small gap 8, and the water in the small gap 8 flows from the second through hole 14a into the sub outer cylinder 9a.

[0009]

[Effect of device]

 The present invention has the above-described structure and operation, and is provided with a flow rate adjuster 10 on the water passage of the water supply inlet 2 and a passage hole 6 of the inner cylinder 7 by means of a valve 5 that moves forward and backward depending on the strength of water pressure. Since the area of passage of water changes greatly, it is possible to maintain a constant amount of water passing regardless of fluctuations in water pressure.

Further, although it is necessary to set the amount of passing water according to the capacity of the water heater, the opening area of the passing hole 6 formed in the inner cylinder 7 is appropriately changed at the time of designing, or the spring constant of the spring 4 is changed. The amount of water can be set just by adjusting the amount of water, and the amount of water is stabilized more than the conventional O-ring is deformed by water pressure.

[Brief description of drawings]

FIG. 1 is a sectional view of a water heater showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a flow rate regulator according to the present invention.

FIG. 3 is an enlarged cross-sectional view of a flow rate regulator used in a conventional water heater.

[Explanation of symbols]

 1 Heat Exchanger 2 Water Supply Inlet 3 Hot Water Supply Outlet 4 Spring 5 Valve 5a Through Hole 6 Through Hole 7 Inner Cylinder 8 Small Gap 9 Outer Cylinder 10 Flow Regulator

Claims (1)

[Scope of utility model registration request] 1. A water heater having a water supply inlet 2 and a hot water supply outlet 3 connected to a heat exchanger 1, having a through hole 5a through which a water flow from the water supply inlet 2 passes, and a spring 4 against a water pressure. The valve 5 that moves back and forth inside the inner cylinder 7, the outlet hole 6 that serves as an outlet for the water that flows into the inner cylinder 7 and the water passage area changes as the valve 5 advances and retracts, and a small gap outside the inner cylinder 7. A flow rate regulator 10 is constituted by the outer cylinder 9 provided with the flow rate regulator 1.
A water heater with a flow rate controller that is installed at 0 at the water supply inlet 2.