Ice thickness probe, ice thickness probe assembly and ice thickness monitoring apparatus

• US 8,049,522 B2
• Filed: 08/26/2008
• Issued: 11/01/2011
• Est. Priority Date: 08/26/2008
• Status: Active Grant

• Current Assignee: Evapco Incorporated
• Original Assignee: Evapco Incorporated
• Inventors: Marshall, Arthur James, Vadder, Davey Joe, Kane, Jeffrey Michael
• Primary Examiner(s): Koval; Melissa
• Assistant Examiner(s): Baldridge; Benjamin M
• Application Number:
  US12/198,504
• Publication Number:
  US 20100052703A1
• Time in Patent Office: 1,162 Days
• Field of Search: 324/699
• US Class Current: 324/699
• CPC Class Codes: F25D 16/00 Devices using a combination of a cooling mode associated with refrigerating machinery with a cooling mode not associated with refrigerating machinery
• CPC Class Codes: F28D 20/028 Control arrangements therefor
• CPC Class Codes: G01B 21/08 for measuring thickness
• CPC Class Codes: Y02E 60/14 Thermal energy storage

Abstract

An ice thickness probe includes a longitudinally-extending probe rod, an insulator casing and a sleeve. The probe rod is fabricated from an electrically-conductive material. The insulator casing is fabricated from an electrically-insulative material and is wrapped around, is in contact with and extends along the probe rod. The sleeve is fabricated from a stiff yet resilient material and is wrapped around, is in contact with and extends along the insulator casing. The insulator casing and the sleeve are concentrically disposed about the probe rod as viewed in cross-section. An ice thickness probe assembly includes a frame structure, a reference bar and at least one ice thickness probe. An ice thickness monitoring apparatus is used in a thermal storage coil having a tank containing water and a tube disposed in the water so that, when the thermal ice storage coil is energized, ice is produced and accumulates on the tube.

Claims

1. An ice thickness probe assembly configured to releasably connect to a tube, the ice thickness probe assembly comprising:

a frame structure including an elongated support member and a pair of clamp members, each clamp member including a first half-block clamp part and a second half-block clamp part operative to releasably connect to each other with the tube being clamped therebetween, the support member being connected to and disposed between respective ones of the first half-block clamp parts and extending parallel to the tube;

a reference bar including a pair of arms and a cross member interconnecting the pair of arms to form a generally U-shaped configuration, respective ones of the pair of arms connected to and extending perpendicularly from the support member in a forward direction, the reference bar fabricated from an electrically conductive material; and

at least one ice thickness probe connected to and extending perpendicularly from the support member in the forward direction with the at least one ice thickness probe and the reference bar being disposed apart from one another, the reference bar and an end of the at least one ice thickness probe being retained by the support member to maintain the at least one ice thickness probe in a spaced parallel relationship to the pair of arms of the reference bar, with a gap between the end of the at least one ice thickness probe and the cross member of the reference bar, the at least one ice thickness probe including a probe rod fabricated from an electrically conductive material.

2. An ice thickness probe assembly according to claim 1, wherein the support member includes at least one probe-receiving hole extending through the support member sized to slidably receive the at least one ice thickness probe.

3. An ice thickness probe assembly according to claim 2, further comprising at least one fastener and wherein the support member includes at least one threaded hole extending perpendicularly from and in communication with the at least one probe-receiving hole, the at least one fastener and the at least one threaded hole in matable engagement with each other such that, when the at least one probe-receiving hole receives the at least one ice thickness probe, the at least one fastener is advanced in the at least one threaded hole to contact the at least one ice thickness probe to secure the at least one ice thickness probe in the at least one probe-receiving hole.

4. An ice thickness probe assembly according to claim 1, wherein the support member extends in a length-wise direction, a width-wise direction and a height-wise direction and is rectangularly shaped as viewed in cross section in the width-wise and height-wise directions, the support member having a front surface, a rear surface, a top surface and a bottom surface with the front and rear surfaces extending parallel to one another in the length-wise and height-wise directions and the top and bottom surfaces extending parallel to one another in the length-wise and width-wise directions and interconnecting the front and rear surfaces, the support member includes at least one probe-receiving hole extending through the front and rear surfaces, the at least on probe-receiving hole is sized to slidably receive the at least one ice thickness probe.

5. An ice thickness probe assembly according to claim 4, wherein the reference bar is connected to the bottom surface of the support member.

6. An ice thickness probe assembly according to claim 5, wherein the pair of arms and the cross member interconnecting the pair of arms to form a skewed generally U-shaped configuration.

7. An ice thickness probe assembly according to claim 1, wherein the pair of arms and the cross member interconnecting the pair of arms form an integral construction.

8. An ice thickness probe assembly according to claim 1, wherein the reference bar is fabricated from stiff yet resilient flat strip of electrically-conductive material.

9. An ice thickness probe assembly according to claim 1, wherein each one of the pair of arms has a connecting arm end portion integrally connected to opposing ends of the cross member, each one of the pair of arms extending from the connecting arm end portion and terminating in a free arm end portion.

10. An ice thickness probe assembly according to claim 9, wherein the support member has a flat bottom surface and the reference bar is fastened to the bottom surface of the support member at respective ones of the free arm end portions.

11. An ice thickness probe assembly according to claim 10, wherein the support member has a flat bottom surface and the reference bar is fastened to the flat bottom surface of the support member at respective ones of the free arm end portions.

12. An ice thickness probe assembly according to claim 1, wherein the at least one ice thickness probe includes a plurality of ice thickness probes and the support member extends in a length-wise direction, a width-wise direction and a height-wise direction and is rectangularly shaped as viewed in cross section in the width-wise and height-wise directions, the support member having a front surface, a rear surface, a top surface and a bottom surface with the front and rear surfaces extending parallel to one another in the length-wise and height-wise directions and the top and bottom surfaces extending parallel to one another in the lengthwise and widthwise directions and interconnecting the front and rear surfaces, the support member includes at least two probe-receiving holes extending through the front and rear surfaces and sized to slidably receive respective ones of the plurality of ice thickness probes.

13. An ice thickness probe assembly according to claim 1, wherein the cross member is disposed apart from the support member at a cross member distance and the at least one ice thickness probe extends from the support member at an ice thickness probe distance being less than the cross member distance.

14. An ice thickness probe assembly according to claim 13, wherein the at least one ice thickness probe is disposed between the pair of arms of the reference bar as viewed in plan view.

15. An ice thickness monitoring apparatus configured for use in a thermal storage coil assembly having a tank containing water and at least one coil tube initially disposed in the water so that, when the thermal ice storage coil assembly is energized, ice can be produced and accumulate on and around the at least one coil tube, the ice thickness monitoring apparatus comprising:

a frame structure releasably connected to the at least one coil tube and including an elongated support member and a pair of clamp members, each clamp member including a first half-block clamp part and a second half-block clamp part operative to releasably connect to each other with the at least one tube being clamped therebetween, the support member being connected to and disposed between respective ones of the first half-block clamp parts and extending parallel to the at least one tube;

a reference bar including a pair of arms and a cross member interconnecting the pair of arms to form a generally U-shaped configuration, respective ones of the pair of arms connected to and extending perpendicularly from the support member in a forward direction, the reference bar fabricated from an electrically conductive material;

at least one ice thickness probe connected to and extending perpendicularly from the support member in the forward direction, the ice thickness probe and the reference bar being disposed apart from one another, the reference bar and an end of the at least one ice thickness probe being retained by the support member to maintain the at least one ice thickness probe in a spaced perpendicular relationship to the pair of arms of the reference bar, with a gap between the end of the at least one ice thickness probe and the cross member of the reference bar, the at least one ice thickness probe including a probe rod fabricated from an electrically conductive material; and

a controller operative to transmit electrical signals to the reference bar so that the electrical signals received by the reference bar are transmitted to the at least one ice thickness probe via the water and operative to receive electrical signals detected by and from the at least one ice thickness probe in the water until the at least one ice thickness probe is enveloped in ice.

16. An ice thickness monitoring apparatus according to claim 15, wherein the at least one ice thickness probe includes a plurality of ice thickness probes, a first one of the plurality of ice thickness probes extending from the support member a first distance and a second one of the plurality of ice thickness probes extending from the support member a second distance being greater than the first distance.

17. An ice thickness monitoring apparatus according to claim 16, wherein the controller is operative to switch a light source in an ON state when ice envelopes the first one of the plurality of ice thickness probes and the controller is operative to de-energize the thermal storage coil assembly thereby discontinuing the production of ice when ice envelopes the second one of the plurality of ice thickness probes.

18. An ice thickness monitoring apparatus according to claim 16, wherein the plurality of ice thickness probes are disposed apart from one another and extend from the support member in a parallel manner relative to each other.

19. An ice thickness monitoring apparatus according to claim 18, wherein the reference bar is disposed in a first plane and the plurality of ice thickness probes are disposed in a second plane, the first plane and the second plane being disposed apart from and extending parallel to one another.