US1383246A - Refrigerating apparatus - Google Patents

Description

C. M. SMITH AND H. WEIGAND.

HEFRIGERATING APPARAIUS.

APPLICATION FILED IAN. 16. 1919.

Patented June .28, 1921.

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UNITED STATES PATENT OFFICE.

CURTIS M. SMITH, OF WASHINGTON. DISTRICT OF COLUMBIA, AND HERMAN WEIG-AND, OF LA GROSSE, KANSAS.

Speccation of Letters Patent.

Application `filed. January 16, 1919. Serial No. 271,465.

To all 107mm z'z may concern Be it known that we. CURTIS M. SMrrH and HERMAN IVEIGAXD. citizens of thc United States. and residents of XVaShington, DistrictI of Columbia. and La Crosse. Kansas, respectively. have invented certain new and useful Improvements in Refrigerating Apparatus, of which the following is a specific-ation.

Our invention is designed to provide a simple and economical absorbent system of refrigeration and to save the various ex! pense in the initial cost and operation in the well known compressor systems and to economize in the known methods of absorption.

In the accompanying drawing,

Figure 1 is a diagrammatic view showing our invention as attached to a well known system of condenser coil receiver and ice tank, while A Fig. 2 is a sectional detail of one of the absorbing units.

It has been heretofore proposed in an absorption system to use a substance such as nitrate of ammonium in a rotatingcylinder receiving the spent gas` which goes into solution with the nitrate but while such a system is very effective it requires the rotation of the cylinders in order to keep the absorption effect-ive and the ammonium nitrate is limited in its absorbing power while we have produced a device by reason of a different absorption material which requires no movement of the cylinders and which will absorb a largerproportion of the ammonia gas the absorbent not going into solution.

In the drawing the condensing coil A, the receiver B and the ice tank C are of ordinary or usual construction and the low pressure gas issues from the ice tank through the pipe a. A cylinder b is provided with a head c and a diaphragm (l, the latter sup-z porting` a series of tubes e. The perforated tube 7 is held within each of the tubes e, the perforations being formed by kerfs g and between the walls of the inner and outer tubes we place our absorbent material, which is preferably composed of anhydrous calcium chlorid mixed with charcoal of a granular form having a grain about that of coarse ground coffee. The chlorid and charcoal are mixed dry and are filled in the space between the two tubes. as shown at h', and as the gas flows through the pipe a, i, h, into the space 7. it passes the length of the tubes j' and gains access through the perforations and the end of the tube 7 to the absorbent' material. where it is perfectly and uniformlyabsorbed. After absorption has taken 'place to the fullest extent possible the valve Z is closed, so that no more gas enters this unit and hotwater or steam is let in through the valve mfrom the steamsupply pipe n and this circulating in the cylinder around the tubes e will volatilize and drive off the ammonia gas and this will pass out through the pipe z. and o to the condenser and receiver and make the circuitas usual. 7e prefer to have two or more units so that while one is absorbing the other is generating.

While absorption is taking place the cylinder Z) is cooled by water from the pipe p and t-he branch pipes q. A. drain pipe is shown at r. A pressure device `is shown at s.

While we prefer to use a mixture of the anhydrous calcium chlorid and charcoal preferably charcoal made of peach stones in the proportion of about ten per cent. of the charcoal and ninety per cent. of the anhydrous calcium chlorid we do not limit ourselves in this particular as the anhydrous calcium chlorid may be used alone, though it is not as effective as used with the charcoal, as the latter material keeps the chlorid from packing and makes it more absorbent, and while we might use the charcoal alone it is not as effective as an absorbent material as the anhydrous calcium chlorid and hence we prefer .to use the two materials in substantially the proportions indicated.

Te are able by the use of our absorbent to carry out the process in a very simple apparatus and very effectively and economically.

We may also employ. instead of the anhydrous calcium chlorid. anotherichemical of the deliquescent chlorid group, namely zinc chlorid, but we prefer the anhydrous calcium chlorid as we find this gives better results.

The charcoal prevents the calcium chlorid from packing. Ihen the calcium chlorid is heated it expands and it contracts when cool and unless some means is provided such as the charcoal, the calcium chlorid would pack into a mass and lessen the absorption capacity of a given quantity of the chlorid.

The charcoal serves vto keep the calcium chlorid in a divided condition and provides Patented Julie 28, 1921.

for the free access of thegas to all parts of the mass of the chlorid While holding it in this separated condition.

The calcium chloridis held in a thin layer about the tubes so that there isjnot more f than one-half inch thickness of calcium chlorid at any point, and this assures that 'the lmass of calcium chlorid' will be quickly, afw jfected by the heating and cooling agents.

The charcoal in addition to performing its function as a separating means for the calcium chlorid also serves as an absorbent and as means by which the gas is conveyed to the particles of the chlorid, so vthatthere Will be no isolated portions of the chlorid which the gas cannot reach. When the heat is applied yit drives the gas off from the charcoal as Well as from the chlorid.

What We claim is: 1.. In an-absorbent ice machine a recep- 1 ta'clecontaining a series of containers, each container ,holding an absorbent material in ieaafie gas to bel absorbed, substantially as described. f

2. ln an absorbent ice machine a cylinder,

a series of containerslocated therein, each container having an absorbent material with an open center, the'lengt-h of the containers,

Vso that the ammonia gas has ready access to the absorbent material and means for heating and cooling the saidcontainers, substantially as described.

3. `ln an absorbent ice machine the combination of Ia chamber, containers Llocated therein, each comprising an outer tube and an inner perforated tube, absorbent material Y cURTis M. SMITH. HERMAN WEiGANn.

' tures.

tubular form, thereby providing an open' center for the easy access. of .the ammonia'

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