Heated regulator with removable heat inducer and fluid heater and methods of use

• US 7,471,882 B2
• Filed: 09/16/2005
• Issued: 12/30/2008
• Est. Priority Date: 09/16/2005
• Status: Active Grant

• Current Assignee: Welker Engineering Co
• Original Assignee: Welker, Inc.
• Inventors: Peebles, Tracy Dean, Green, Thomas S.
• Primary Examiner(s): Campbell; Thor S
• Application Number:
  US11/162,626
• Publication Number:
  US 20050274171A1
• Time in Patent Office: 1,201 Days
• Field of Search: 392/311
• US Class Current: 392/311
• CPC Class Codes: F24H 1/102 with resistance
• CPC Class Codes: G05D 16/0663 using a spring-loaded membrane with a spring-loaded slideable obturator

Abstract

A removable heat inducer may be used in either a heated regulator or a fluid heater. The removable heat inducer has various embodiments. In one embodiment, helical threads are formed on the outside surface of the inducer. The inducer expands when heated causing the crest of the threads to come into contact with the inside surface of a heating chamber to form a spiral fluid passageway which promotes better heat exchange between the fluid and the heating element. In a first alternative embodiment of the inducer, a series of walled partitions and slots are formed on the outside surface of the inducer, which likewise expand and contact the inside surface of the heating chamber to form a dead head flow passageway. Again, the purpose of the passageway is to promote efficient heat exchange. In a second alternative embodiment of the removable heat inducer, a plurality of rods are placed in the heating chamber to promote heat exchange. The spaces between the rods form passageways for the fluid. The removable heat inducer may be used in a heated regulator or a fluid heater.

Claims

1. A heated fluid regulator comprising:

a body having an inlet, an outlet and a heating chamber proximate the inlet;

a heating tube, at least a portion of which is positioned in the heating chamber;

a removable heat inducer sized and arranged to fit inside the heating chamber and contacting at least a portion of the heating tube;

an electric heating element located inside the heating tube to heat the heating tube, the heat inducer and the fluid as it flows through the heating chamber; and

wherein the removable heat inducer comprises a plurality of rods in the heating chamber, at least some of which are in contact with the heat tube.

2. The apparatus of claim 1 wherein a clearance between an outside diameter of the heat inducer and an inside diameter of the heating chamber is small enough to allow the outside diameter of the heat inducer to expand into contact with the inside diameter of the heating chamber when the heating element is on.

3. A heated fluid regulator comprising:

a body having an inlet, an outlet, a regulator mechanism between the inlet and the outlet and a heating chamber;

a heating tube penetrating the body and positioned in the heating chamber;

a removable heat inducer sized and arranged to fit inside the heating chamber and straddle at least a portion of the heating tube;

an electric heating element located inside the heating tube to heat the heating tube and the heat inducer and the fluid as it flows through the heating chamber;

the heat inducer having sufficient clearance with the heating chamber when the regulator is cold to be removed from the heating chamber and expanding into contact with the heating chamber when the regulator is heated; and

wherein the removable heat inducer has an irregular passageway formed on at least a portion of an exterior surface of the heat inducer with an opening to allow the heat inducer to straddle at least a portion of the heat tube.

4. A heated fluid regulator comprising:

a body having an inlet, an outlet, a regulator mechanism between the inlet and the outlet and a heating chamber;

a heating tube penetrating the body and positioned in the heating chamber;

a removable heat inducer sized and arranged to fit inside the heating chamber and straddle at least a portion of the heating tube;

an electric heating element located inside the heating tube to heat the heating tube and the heat inducer and the fluid as it flows through the heating chamber;

the heat inducer having sufficient clearance with the heating chamber when the regulator is cold to be removed from the heating chamber and expanding into contact with the heating chamber when the regulator is heated; and

wherein the removable heat inducer is formed from a plurality of rods.

5. A fluid heater comprising:

a body defining a heating chamber having an inlet and an outlet;

a heating tube, at least a portion of which is positioned in the heating chamber;

a removable heat inducer sized and arranged to fit into the heating chamber and contact at least a portion of the heating tube;

an electric heating element, a portion of which is positioned inside the heating tube to heat the tube, the heat inducer and the fluid as it passes through the; and

wherein the removable heat inducer is formed from a plurality of rods.