JP4311330B2 - Hot water storage water heater - Google Patents

Description

  The present invention relates to a hot water storage type hot water heater that uses electric power to boil hot water.

Conventionally, this type of hot water storage hot water heater has been provided with a relief valve at the top of the tank to automatically suppress the rise in the pressure in the tank due to the expansion of the hot water during boiling and drain the hot water in the tank As a configuration to ensure this replacement action, the relief valve has an operating lever so that the valve body can be manually opened and closed, and this operating lever is operated. Thus, the valve body can be opened and closed by the manual opening / closing mechanism. The manual opening / closing mechanism is configured to freely rotate with respect to the rotation direction about the valve shaft, and moves freely even when the operation lever is opened and closed (see, for example, Patent Document 1).

3A shows a conventional relief valve described in Patent Document 1, and FIG. 3B shows an overall configuration diagram. As shown in FIG. 3 (b), the tank 1 is composed of an outer casing 3, a front plate 4, and a relief valve 5. The relief valve is an operating lever as shown in FIG. 3 (a). 9 is generally configured such that when the operation lever 9 is rotated in a direction other than the operation direction, the operation lever 9 is freely rotated.
JP-A-11-108450

  However, in the conventional configuration, even when the operation lever is rotated in a direction other than the operation direction, the operation lever is freely rotated, and the relief valve is generally installed at the upper part of the hot water storage tank. Therefore, it is forced to operate the control lever at a point exceeding the height.

  Thus, in the conventional configuration, when manually operating the relief valve, it is necessary to perform the operation in a high place where the height is exceeded and the operation lever freely moves, and the operability is poor. There was a problem that there was a risk of touching the hot part.

  The present invention solves the above-described conventional problems and provides a hot water storage type hot water heater that improves operability during manual operation of the relief valve and reduces contact with the high temperature part during operation and has high safety. For the purpose.

In order to solve the above-described conventional problems, a hot water storage type hot water heater according to the present invention includes a tank for storing hot water heated by a heating means, and a manual operation for disposing the expanded water in the tank disposed above the tank. A pressure relief valve having an openable / closable operation lever, a relief valve fixture for fixing the pressure relief valve to a housing, and a direction other than the operation direction of the operation lever linked to the opening / closing operation of the pressure relief valve. A rotation restricting means for restricting the rotation is provided .

  As a result, the operability of the relief valve can be improved and the contact with the high temperature part during operation can be reduced.

  INDUSTRIAL APPLICABILITY The hot water storage type hot water heater of the present invention can improve the operability during manual operation of the relief valve and can provide a highly safe hot water storage type hot water heater by reducing contact with the high temperature part during operation.

A first invention is a tank for storing hot water heated by a heating means, a pressure relief valve having an operation lever that is disposed at an upper part of the tank and that can be manually opened and closed to discharge expanded water in the tank, A relief valve fixture for fixing the pressure relief valve to the housing; and a rotation regulating means for regulating the rotation of the operation lever in a direction other than the operation direction in conjunction with the opening / closing operation of the pressure relief valve . It is characterized by this.

  According to the present invention, when the operating lever is moved, it does not rotate in any direction other than the predetermined operating direction. Therefore, it is only necessary to apply a force in the moving direction of the operating lever. In operation, the operating lever can be operated reliably, improving the operability during manual operation of the relief valve and reducing the contact with the high temperature part during operation, providing a highly safe hot water storage hot water heater can do.

  The second invention is characterized in that, in the first invention, the rotation angle of the operation lever is regulated by a guide claw provided in the relief valve fixture as the rotation regulating means.

  According to the present invention, the fixing of the relief valve and the restriction of the rotation angle of the operation lever can be performed with one component called a relief valve fixture, the structure can be simplified, and the operability during manual operation of the relief valve. It is possible to provide a hot water storage type hot water heater with improved safety and reduced contact with the high temperature part during operation.

  According to a third aspect of the present invention, in the first and second aspects of the present invention, the relief valve fixture is formed of a metal plate that fixes the relief valve body to the housing, and a guide claw is provided at the tip of the relief valve body. The manual opening / closing mechanism is configured not to rotate when a part of the opening / closing mechanism abuts on the guide claw.

  According to the present invention, the fixing of the relief valve and the restriction of the rotation angle of the operation lever can be performed with one component called a relief valve fixture, the structure can be simplified, and the operability during manual operation of the relief valve. It is possible to provide a hot water storage type hot water heater with improved safety and reduced contact with the high temperature part during operation.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is an overall configuration diagram of a hot water storage hot water machine according to a first embodiment of the present invention, and FIG. 2 is a detailed view of the relief valve and the relief valve fixture.

  In the figure, hot water in a tank 1 for storing hot water is heated by the heating means 2, and hot water is stored in a stacked state from the upper part of the tank 1. Reference numeral 3 denotes a rectangular parallelepiped exterior housing that is open at the front, and a front plate 4 that can be attached and detached by screws is fixed. The front plate 4 is used in the case of hot water supply piping, electrical work, or maintenance work. Can be done.

  A pressure relief valve provided at the top of the tank 1 so that when the hot water in the tank 1 is heated by the heating means 2, the pressure in the tank 1 rises excessively to cause damage to the tank 1 or damage to the piping. 5, when the pressure rises to a predetermined pressure or higher, a valve body (not shown) built in the relief valve 5 is opened to automatically release the pressure. The released pressure passes through the metal tube 13 and is discharged from the drain port 14. Reference numeral 6 denotes a relief valve fixing tool for fixing the relief valve 5 to the exterior housing 3.

  2A is a side view showing the mounting configuration of the relief valve 5, and FIG. 2B is a front view of the relief valve 5. The relief valve 5 has a pressure sensing port 7, a relief port 8, an operation lever 9, and the operation lever. 9 is constituted by a valve shaft 5a linked to 9 and an opening / closing mechanism 5b for manually moving the valve shaft 5a by an operation lever 9. The escape port 8 has a shape of a hose nipple in the past, and a rubber hose is used for connection to the drain port. However, in the present embodiment, the connection to the drain port is used. Since the metal tube 13 is used, the escape port 8 has a socket shape. As a result, the connection method is changed from the conventional hose band to the quick fastener. The operation lever 9 rotates 360 degrees around the valve shaft 5a, and the relief valve 5 is opened and closed by pulling the operation lever 9 forward or pushing it in.

The relief valve fixing tool 6 has a relief valve fixing surface 10 having a fixing hole for fixing the relief valve 5, and a direction other than the operation direction of the operation lever 9 of the relief valve 5 at the tip of the relief valve fixing surface 10. The guide claw 11 is a rotation restricting means for restricting the rotation angle, and the case fixing surface 12 having a hole for fixing to the outer case 3. The outer case 3 is separated from the relief valve fixing surface 10. The escape port 8 that is heated by the hot water and the hand are kept at a certain distance.

  As shown in FIG. 2B, the guide claw 11 serves as a rotation restricting means. When the operation lever 9 is rotated in a direction other than a predetermined operation direction, the valve shaft 5 a is manually operated by the operation lever 9. The opening / closing mechanism 5b for moving at the abutment is in contact with the guide claw 11 to restrict further rotation. This rotation restriction works in the same way when the operation lever 9 is rotated in the opposite direction, and the rotation of the operation lever 9 is restricted in both directions, and the operation lever 9 moves only in the normal operation direction.

  With this configuration, when the operation lever 9 is moved, it does not rotate in any direction other than the predetermined operation direction. Therefore, it is only necessary to apply a force in the direction in which the operation lever 9 moves. In operation, the operating lever 9 can be operated reliably, improving the operability when the relief valve 5 is manually operated, and reducing the contact with the high temperature part during the operation, so that the hot water storage hot water heater is highly safe. Can be provided.

  In the above configuration, the operation will be briefly described. Hot water stored in the tank 1 is heated by the heating means 2 and stored in a stratified state from the upper part of the tank 1. During this heating process, the hot water in the tank 1 expands and the tank internal pressure rises. If this tank internal pressure rises too much, it will lead to damage of the tank 1 and so on, and if the pressure rises above the pressure set by the pressure relief valve 5 arranged at the location communicating with the upper part of the tank 1, the built-in valve body will automatically And the expansion water in the tank 1 is discharged from the outlet 8 to reduce the tank internal pressure. This action is normally performed automatically in conjunction with the boiling operation, but the valve body of the pressure relief valve 5 is forcibly periodically in order to check whether the above action is performed normally. And confirm that the hot water in the tank 1 is discharged.

  The operation of the pressure relief valve 5 can be confirmed by forcibly moving the valve shaft 5a by the operation of the operation lever 9 and the opening / closing mechanism 5b acting in conjunction therewith. At this time, the operation lever 9 and the opening / closing mechanism 5b are configured to freely rotate 360 ° in the rotational direction about the valve shaft 5a, and the pressure relief valve 5 is disposed in the upper part of the tank 1. Therefore, when a general user performs the above-described operation, when the operation lever 9 is operated, the operation lever 9 is rotated in a direction other than the normal direction, and is in close proximity. There is a risk of causing the hand to come into contact with the hot part.

  In this embodiment, in order to avoid this unstable work, the relief valve fixture 6 is provided with a guide claw 11 as a rotation restricting means so that the operation lever 9 does not rotate except in the normal operation direction. Yes. With the simple configuration in which the guide claw 11 is provided on the relief valve fixture 6, it is possible to ensure reliable operability of the operation lever 9 when confirming the operation of the pressure relief valve 5.

  As described above, the hot water storage type water heater according to the present invention has a configuration that ensures the reliable operation of the operation lever when confirming the operation of the pressure relief valve. The present invention is not limited to this, and can be applied to devices that store hot water using gas, oil, solar heat, etc., perform bath operation using the stored hot water, and all devices that include a relief valve.

Overall configuration diagram of a hot water storage type hot water heater in Embodiment 1 of the present invention (A) Side view showing the mounting configuration of the relief valve in the hot water storage type water heater (b) Front view showing the mounting configuration of the relief valve (A) Detailed view of a relief valve of a conventional hot water storage type hot water heater (b) Overall configuration diagram of a conventional hot water storage type hot water heater

DESCRIPTION OF SYMBOLS 1 Tank 2 Heating means 3 Case 5 Relief valve 6 Relief valve fixture 9 Operation lever 11 Guide claw (turning restriction means)

Claims (3)

A tank for storing hot water heated by the heating means, a pressure relief valve provided at the top of the tank and having a manually openable / closable operation lever for discharging the expanded water in the tank, and the pressure relief valve are provided. A hot water storage system comprising: a relief valve fixing tool that is fixed to a body; and a rotation regulating means that regulates rotation of the operation lever in a direction other than the operation direction in conjunction with the opening / closing operation of the pressure relief valve. Water heater. The hot water storage type hot water heater according to claim 1, wherein the rotation restricting means restricts the rotation angle of the operation lever by a guide claw provided on the relief valve fixture. The relief valve fixture is composed of a metal plate that fixes the relief valve body to the housing, and is provided with a guide claw at its tip, and a part of the manual opening / closing mechanism of the relief valve abuts on the guide claw, The hot water storage type hot water heater according to claim 1 or 2, wherein the manual opening / closing mechanism is configured not to rotate.

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