US1860930A - Heating apparatus - Google Patents

Description

May 31, 1932. 1. c. JENNINGS 1,360,936

' HEATING APPARATUS Filed May 17, 1929 5 Sheets$heet 1 INVEN TOR A TTORNEYJ y 1932- I. c. JENNINGS 1,8605930 HEATING APPARATUS Filed May 17. 19 29 5 Sheets-Sheet 5 I N VEN TOR BY W LZZW,

May 31, 1932.

|. c. JENNINGS 1,860,930

HEATING APPARATUS Filed May 17, 1929 5 Sheets-Sheet 2 IN V EN TOR A TTORNEYJ Patented May 31, 1932 UNrrEn STAT-ES IRVING G. JENNINGS, OF SOUTH NORWALK, CONNECTICUT 4 HEATING APPARATUS Application filed May 17,

The object of this invention is to improve vacuum steam heatingapparatus, and particularly the vacuum steam heating apparatus illustrated in Letters Patent reissuedto me June 26,1923, No. 15,637. I

This vacuum steam heating apparatus consists in its main elements of a separating tank to which the returns fromthe steam heating system are led, an air or gas pump for exhausting the air or gas therefrom and thus establishing and maintaining the vacuum 1n the return side of the heating system, and a pump for returning the water of condensation to the boiler. l

The air or gas pump which is employed consists of a rotor having peripheral displacement chambers running in an eccentric or elliptical casing and employing water for its pumping action. It is desirable in practice to return the water of condensation to the boiler as hot as is possible so as to conserve the heat. The hotter the water of'condensation and the higher the vacuum, the i more vapor that is associated withit. This vapor has to be removed from the heating system as well as the air. the air pump is reduced by the amount of vapor'to be handled. v 1

In the apparatus previously referred to, a

in the airor gaspump. I do this preferably byreturning the water thrown outby the air pump directly to theair or' gas pump itself and by cooling this water as it returns to the pump. Byth'is arrangement, the waterin the pumponly will be cooled and a considerableportion of the vaporor steam coming back with the returns from the heating sys- I term will be condensed, while at the same time the-water of condensationin the separating tank will be maintained at its high temperature and the heat therein utilized as the same is pumped back to the,boiler.

To inject cold water into the whole heating The capacity of separator is providedin the discharge of 1929. Serial No. 363,923.

system would require a considerable amount of water, much of which would have to be wasted, and would reduce the temperature of the water which is returned to the boiler. By injecting cool waterinto the lobe of the '55 air or gas pump, but verydittle additional water need be used and practically all of the water of condensation in the separating tank can be returned to the boiler at a high temperature. Such an arrangement prevents the air pump from having its eficiency reduced when handling very hot returns and enables a higher vacuum to be obtained or a smaller pump to be used. A I The invention is illustrated in the accompanying three sheets of drawings, referring to which i l r Figure 1 is an elevation, partly in section, illustrating a perferrefd form of the improvement; A Fig. 2 is a similar view illustrating a modification; l

Fig. 3 'is an elevation illustrating' how the improvement can be applied to a duplex pumping system; 7 g v 1 Fig. 4 is a cross sectional elevation of the parts shown in Fig. 8, the piping being somewhat differently arranged for the purpose of illustration; v l 1 I Fig. 5 is a detail of a-restricted connection used in the apparatus shown in Fig. 4; Fig. 6 is an illustration of a modified cooling means which can be employed;

Fig. 7 is an illustration of another modified form of cooling means which may be em ployed; and A Y Fig. '8 is a cross sectional view of theair or gas pump employed.

"In detail in the drawings, referring first to Fig. 1, M designates anelectriomotor, which is connected to drive the air or'gas pump N, which is of the well known Nash type, and also a centrifugal water pump 0. r The air or gas pump is illustrated in'Fig. 8. The same comprises a rotor R arranged in an elliptical casing provided with suitable ports, the pumping actionbeing obtained by the outward throw and inward compression of the water in thedisplacement chambers as the rotor is revolved at high speed.

The returns from the heating system. are led through a pipe and a strainer 11 into the separating tank S. The water of condensation is led by a pipe 12 to the centrifu- 5 gal pump C, which forces the same back to the boiler. A relief pipe 14 is connected to the top of the separating tank to prevent the centrifugal water pump from becoming air bound.

The top of the separating tank S is connected by pipes 15 and 15 to the air pump N, the relief pipe 14 being convenientlyconnected to the pipe 15. A vacuum relief valve 16 is usually arranged in this piping.

An eduction or escape pipe 17 is extended upwardly from the air pumpN and is carried to some convenient point where the air and gas withdrawn from the. system canbe discharged, a forwardly opening check valve 18 i usually being arranged in this piping.

A catch pot or separating chamber 19 is arranged in this piping and the same is connected by, a pipe 20 to the lobe or casing of the air pump N, a regulating valve 21 being preferably arranged in this piping.

A cooling means is interposed in this piping 20. I This cooling means, as shown in Fig. 1, comprises a pot or cylinder 22 in which is arranged a cooling coil 23 through which cold water is circulated, whereby as the water which is separated out inthe pot 19 returns to the pump, the same will be cooled.

The cooler coil 23 may be arranged in the hot, water supply of the building so that the heat taken away from the cooler pot can be utilized. 7 V r i A water inlet pipe 24 is connected to the catch pot or separator 19 and the Same is pro-- vided' with a ball-cock valve 25 which is designed to open and let in a little cold water from time to time to replace any waste or diminution in the water which is employed in the air or gas pump.

In operation, as a percentage of the water employed in the air or gas pump N is thrown or carried out in the pipe 17 the same is collected in the catch pot or separator 19, and

as this water is led back to the air or gas pump, the same is cooled by the coil23. Thus as the, water employed in the air or gas pump is kept at a low temperature relatively to the water inthe return system and separating tank and thus the advantageous results previous-lyreferred to are obtained,

In the modification shown in Fig. 2, the water passing through the airescape pipe 17 from the pump and collected in the separator pot 19 is allowed to pass out through a waste pipe 26 which may be controlled'by a ballthe cooler pot 22 through a pipe 260. In

thismodification, it is'not always necessary means for cooling the liquid used in the air cock Valve 27 and fresh water is supplied to" to the air pumps. In this construction, a coupling 31 is preferably arranged in the pipe 28 carrying the water to the cooler pot, which coupling contains a disc having a small aperture so that the circulation can be accurately adjusted. j In Fig. 6 I have shown a different cooling mechanism which can be employed which consists of a radiator 33 and an electrically driven fan 34. V

In Fig. 7 I have shown a still further modification which consists of a larger pipe 35 jacketing the pipe 28, cold water being led into the jacket through a supply pipe 36 and withdrawn therefrom by a pipe 37.

7 By the devices previously described,it will be seen that the water employed in the air or gas pump will be kept at a lower temperature than the water of condensation. and the efficiency of the pump will therefore be increased without lowering or reducing the temperature of the condensate in the separating tank which is to be returned to the boiler.

The details and arrangements herein shown and described may begreatly varied by a 5 skilled mechanic without departing from the scope of my invention as expressed in the claims. I

. While I have shown and described the improvement as' applied particularly to my specific vacuum steam heating pumping apparatus, it is obvious of course that the same can be applied and used in many other'forms of pumping apparatus designed and adapted for the specific purpose stated.

Having thus fullydescribed my invention, what I claim and desire to secure by Letters Patent is p 1. In a vacuum steam heating system, the combination of supply and return lines, a separating tank to which the return line is connected, an air or gas pump employing liquid for its pumping action connected to maintain the vacuum in the return line,

126 or gas pump so that the same will act both as a condenser for steam or vapor as well to exhaust the air or gas from the system, .and a water pump for handling the water of condensation. I 12 2. In a vacuum steam heating apparatus, the combination of a separating tank,-an air or gaspump for establishing and maintaining a vacuum, said pump employing liquid for its pumping action, means for separating the liquid from the exhaust of the air pump, connections for returning this separated liquid directly to the'air pump, and a liquid pump for handling the Water of condensation.

3. In a vacuum steam heating apparatus, the combination of a separating tank, an air or gas pump for establishing and maintaining a vacuum, said pump employing liquid for its pumping action, means for separating the liquid from the exhaust of the air pump, connections for returning this separated liquid to the air pump, and means for cooling the liquid as it is returned to the air pump.

4. In a vacuum steam heating apparatus, the combination of a separating tank, an air or gas pump for establishing and maintain ing a vacuum, said pump employing liquid for its pumping action, means for separating the liquid from the exhaust of the air pump, connections for returning the separated liquid to the air pump, means for cooling the liquid as it is returned to the air pump and means for supplying additional liquid as needed to the liquid supply for the pump.

5. In a vacuum steam heating apparatus, the combination of a separating tank, an air or gas pump for establishing and maintaining a vacuum, said pump employing liquid for its pumping action, means for separating the liquid from the exhaust of the air pump, a cooling device consisting of a cooler pot and coil to Which the separated liquid is led, and a connection from the cooler pot back to the air pump.

6. In a vacuum steam heating apparatus,

the combination of a separating tank, a r0- tary air or gas pump employing liquid for its pumping action and connected to exhaust the air or gas from the tank, a centrifugal Water pump for returning the Water of condensation from the tank to the boiler, means for separating the liquid from the exhaust of the air pump, connections for returning this separated liquid to the air pump, and means for cooling the separated liquid as its passes back to the air pump. 7

In testimony whereof I have hereunto affixed my signature.

IRVING C. JENNINGS.

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