Leak detection sensor assemblies for water heaters

Patent metadata

Field	Value
Publication number	US-10480824-B2
Application number	US-201715811187-A
Country	US
Kind code	B2
Filing date	Nov 13, 2017
Priority date	Nov 13, 2017
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

A water heater includes a leak detection system. The leak detection system includes a leak sensor assembly that is disposed in a bottom pan of the water heater. The leak sensor assembly includes a sensor housing that has a sensor channel that is formed therein such that the sensor channel is disposed at an elevation from a base of the bottom pan when the sensor housing is disposed on the base of the bottom pan. Further, the leak sensor assembly includes a leak sensor that is disposed in the sensor channel of the sensor housing. The leak sensor detects water that leaks from the water heater and accumulates in the bottom pan when a level of the water in the bottom pan rises to the elevation of the sensor channel and the leak sensor that is disposed therein.

First claim

What is claimed is:

1. A water heater comprising:
a bottom pan that comprises:
a base
a sidewall disposed along a perimeter of the base; and

a leak sensor assembly that is configured to detect water that leaks from the water heater, the leak sensor assembly comprising:
a sensor housing that comprises a sensor channel that is formed therein such that the sensor channel is disposed at an elevation from the base of the bottom pan when the sensor housing is disposed on the base of the bottom pan; and
a leak sensor that is disposed in the sensor channel of the sensor housing,
wherein the sensor housing comprises a body that has a disc shaped profile and a through hole formed therein,
wherein the through hole is configured to receive a fastener therethrough to couple the sensor housing to the bottom pan,
wherein the body is formed of two halves that are hingedly coupled to each other, and
wherein the sensor channel extends circumferentially along a perimeter of the body and on an outer surface of the body;

a shut-off valve that is configured to control a flow of the water into a storage tank of the water heater; and
a controller that is coupled to the leak sensor and configured to control the shut-off valve,
wherein responsive to receiving a signal from the leak sensor that the leak sensor has detected water, the controller is configured to:
close the shut-off valve during a first mode of operation, and
send a query to a computing device of a user associated with the water heater and close the shut-off valve based on an input from the user during a second mode of operation.

2. The water heater of claim 1 , wherein the bottom pan further comprises a channeling member that extends radially outward and away from a top edge of the sidewall, and wherein the channeling member is configured to direct water that leaks from one or more portions of the water heater towards the base of the bottom pan.

3. The water heater of claim 1 , wherein the bottom pan of the water heater is configured to receive and support at least a storage tank and an outer jacket of the water heater.

4. The water heater of claim 1 :
wherein the body comprises:
a body sidewall,
an annular top flange that extends from a top edge of the body sidewall, and
an annular bottom flange that extends from a bottom edge of the body sidewall and parallel to the annular top flange,

wherein the sensor channel is disposed between the annular top flange and the annular bottom flange,
wherein the annular top flange is wider than the bottom annular flange, and
wherein a thickness of the annular bottom flange elevates the sensor channel above the base of the bottom pan when the sensor housing is disposed on the base of the bottom flange.

5. A leak detection system comprising:
a leak sensor assembly that is configured to be disposed in a reservoir associated with a water heater and to detect water that leaks from the water heater and accumulates in the reservoir, the leak sensor assembly comprising:
a sensor housing that comprises a sensor channel that is formed therein, wherein the sensor housing comprises:
an elongate member that has a curved body and defines a portion of the sensor channel such that the portion of the sensor channel is disposed at a first elevation from a base of the reservoir when the sensor housing is disposed in the reservoir;
a head disposed at an end of the elongate member, the head defining a remainder portion of the sensor channel such that the remainder portion of the sensor channel is disposed at a second elevation from the base of the reservoir when the sensor housing is disposed in the reservoir, the second elevation being higher than the first elevation; and

a leak sensor that is disposed in the sensor channel of the sensor housing and configured to detect the water that leaks from the water heater when the water collected in the reservoir rises to the first elevation at which the leak sensor is disposed in the sensor channel, wherein the head of the sensor housing is configured to extend the leak sensor external to the reservoir.

6. The leak detection system of claim 5 , wherein the leak sensor is a rope sensor.

7. A leak detection system comprising:
a leak sensor assembly that is configured to be disposed in a bottom pan of a water heater and to detect water that leaks from the water heater and accumulates in the bottom pan, the leak sensor assembly comprising:
a sensor housing that comprises a sensor channel that is formed therein such that the sensor channel is disposed at an elevation from a base of the bottom pan when the sensor housing is disposed on the base of the bottom pan; and
a leak sensor that is disposed in the sensor channel of the sensor housing,
wherein the sensor housing comprises a body that has a disc shaped profile and a through hole formed therein,
wherein the through hole is configured to receive a fastener therethrough to couple the sensor housing to the bottom pan,
wherein the body is formed of two halves that are hingedly coupled to each other, and
wherein the sensor channel extends circumferentially along a perimeter of the body and on an outer surface of the body.

8. The leak detection system of claim 5 :
wherein the sensor housing comprises:
one or more feet members that extend out from a bottom of the elongate member and are configured to dispose the sensor channel at the first elevation from the base of the reservoir when the sensor housing is disposed on the base of the reservoir, and wherein the portion of the sensor channel connects with the remainder portion of the sensor channel through a cavity that is formed in the head, and
wherein the portion of the sensor channel has a cross-sectional profile having a first shape and the remainder portion of the sensor channel has a cross-sectional profile having a second shape.

9. The leak detection system of claim 5 :
wherein the head comprises:
a vertical member that extends substantially perpendicular to the elongate member from the end of the elongate member, the vertical member being parallel to one or more feet members that extend out from a bottom of the elongate member;
an angled member that extends upwards and at an obtuse angle to the vertical member from an end of the vertical member; and
a horizontal member that extends substantially parallel to the elongate member from an end of the angled member, the horizontal member being disposed at the second elevation from the base of the reservoir,

wherein the horizontal member comprises snap tabs that are configured to receive and securely retain a portion of the leak sensor that is disposed in the remainder portion of the sensor housing defined by the head, and
wherein the cavity that connects the portion of the sensor channel to the remainder portion of the sensor channel is formed in the vertical member of the head.

10. The leak detection system of claim 9 , wherein a slope of the angled member allows the head of the sensor housing to clear a sidewall of the reservoir by passing above the sidewall.

11. The leak detection system of claim 5 , wherein the curved body of the elongate member and the head are configured to prevent triggering of the leak sensor by water that drips on a top portion of the sensor housing from a normal operation of the water heater.

12. The leak detection system of claim 7 :
wherein the body of the sensor housing comprises:
a sidewall,
an annular top flange that extends from a top edge of the sidewall, and
an annular bottom flange that extends from a bottom edge of the sidewall and parallel to the annular top flange,

wherein the sensor channel is disposed between the annula

Assignees

• Rheem Mfg Co

Inventors

• Gardner Joseph D
• Boros Jozef
• Scott Timothy D
• Hall William J
• Chaudhry Raheel A
• Welk Gregory M

Classifications

• G01M3/165

  by means of cables or similar elongated devices, e.g. tapes · CPC title

• E03B7/071

  Arrangement of safety devices in domestic pipe systems, e.g. devices for automatic shut-off · CPC title

• G01F23/00

  Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm · CPC title

• F24H9/165

  Mechanical Engineering · mapped topic

• F24H9/2007 Primary

  for water heaters · CPC title