IP Library › Granted Patent US 7,513,684
Granted Patent B2
US 7,513,684 · App. 11/353,384 · Granted Apr 7, 2009

Calcium silicate hydrate material for use as ballast in thermostatic expansion valve

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Quick Facts
Patent No.
US 7,513,684
App. No.
11/353,384
Granted
Apr 7, 2009
Kind
B2
Abstract

A thermal sensing bulb for an expansion valve, the bulb containing a ballast material, the ballast material including a plurality of particles including a calcium silicate hydrate.

Claims (16)

1. A thermal sensing bulb for an expansion valve, the bulb containing a ballast material, the ballast material comprising a plurality of particles including a calcium silicate hydrate, wherein the particles are substantially uniform in physical characteristic and a given quantity of the particles exhibits a substantially uniform adsorption characteristic.

2. The thermal sensing bulb of claim 1 wherein the physical characteristic in which the particles are substantially uniform include one or more of size, shape, weight and density.

3. The thermal sensing bulb of claim 1 wherein the plurality of particles comprises from about 10 to about 10,000 said particles.

4. The thermal sensing bulb of claim 1 wherein the particles have an average particle size ranging from about 0.1 to about 10 mm.

5. The thermal sensing bulb of claim 1 wherein the particles further comprise a binder.

6. The thermal sensing bulb of claim 5 wherein the binder comprises wollastonite.

7. The thermal sensing bulb of claim 1 wherein the particles further comprise one or more filler.

8. A refrigeration system comprising:

a thermostatic expansion valve, said expansion valve comprising a thermal sensing bulb, said thermal sensing bulb comprising a working fluid, said working fluid sealed inside said thermal sensing bulb and in operative communication with said expansion valve; and

a ballast in said thermal sensing bulb, said ballast including a plurality of particles comprising a calcium silicate hydrate, wherein the particles are substantially uniform in physical characteristic and a given quantity of the particles exhibits a substantially uniform adsorption characteristic.

9. The refrigeration system of claim 8 wherein the physical characteristic in which the particles are substantially uniform include one or more of size, shape, weight and density.

10. The refrigeration system of claim 8 wherein the plurality of particles comprises from about 10 to about 10,000 said particles.

11. The refrigeration system of claim 8 wherein the particles have an average particle size ranging from about 0.1 to about 10 mm.

12. The refrigeration system of claim 8 wherein the particles further comprise a binder.

13. The refrigeration system of claim 12 wherein the binder comprises wollastonite.

14. The refrigeration system of claim 8 wherein the particles further comprise one or more filler.