US2265282A

US2265282A - Regulating device

Info

Publication number: US2265282A
Application number: US216489A
Authority: US
Inventors: Heinrich Johann
Original assignee: MASCH und METALLWAREN HANDELS
Current assignee: MASCH und METALLWAREN HANDELS; Maschinen-Und Metallwaren-Handelsgesellschaft Mbh
Priority date: 1937-02-13
Filing date: 1938-06-29
Publication date: 1941-12-09
Anticipated expiration: 1958-12-09

Description

9, 1941. J. HEINRICH 2,265,282

'REGULATING DEVICE Filed June 29, 1938 2 Sheets-Sheet 1 Egg. 1.

INVENTOR JOHANN HEINRICH ATTORNEYS 1941- J. HEINRICH 2, ,282

REGULATING DEVICE Filed June 29, 1938 2 Sheets-Sheet 2 Egg. 2.

N 11]! O 1F y y 1 f L 9 /7 24 3 5 /5 I 7 \SEQIIIIIIIIIIIA f l I llflflflfl H a; I 1 4 l I I l I INVENTOR JoHA NN HE/NR/ H ATTORNEYS Patented Dec. 9, 1941 REGULATING DEVICE Johann Heinrich, Berlin-Tegel, Germany, as-

signor,

und Metallwaren-Handelsgesellschait m.

by mesne assignments, to Maschinen- Berlin, Germany, a limited-liability company of Germany Application June 29, 1938, Serial No. 216,489 In Germany February 13, 1937 3 Claims.

This invention relates to a regulating device for refrigeration plants and refers more particularly to means for automatically regulating the amount or liquid in evaporators of refrigeration plants.

An object or the present invention is the provision of an automatic regulating device of this type which is solid and dependable in operation and'which will not jam or get out of commission due to the pressure of the cooling medium.

Another object is the provision of an automatic regulating device for refrigeration plants, the movable parts of which can easilyovercome the friction resulting from the pressure of the cooling medium.

' Other objects of the present invention will be apparent in the course of the following speciiication.

The objects of the present invention may be realized through the provision of a flow valve which is included in the conduit supplying the liquid cooling medium to the evaporator, and which is operated by the compressed gaseous cooling medium depending upon the position of a float which indicates the level of the liquid cooling medium in the evaporator. The flow of the compressed gaseous cooling medium to the valve is regulated by a pivot which is connected to the float, and which provides for the removal or the compressed gaseous cooling medium from the valve and the closing of the latter when the liquid cooling medium in the evaporator has reached a desired level.

The invention will appear more clearly from the following detailed description when taken in connection with the accompanying drawings, showing by way of example a preferred embodiment of the inventive idea.

In the drawings:

Figure 1 illustrates diagrammatically, partly in section, a regulating device constructed in accordance with the principles of the present invention;

Figure 2 is an enlarged detail view in section, of the float container;

Figure 3 is a section along the line 33 of Figure 2 on a larger scale; and

Figure 4 is a section along the line 4-4 of F ure 2.

Figure 1 shows an evaporator 5 which may be filled with the liquid cooling medium and which carries a container 6. The interior of the I container 6 is connected with that of the evaporator 5, so that the level of the liquid in the container 6 depends upon that of the evaporator 5. The container 6 is connected by means of a pipe I with a compressor 8, which is illustrated diagrammaticall in the drawings.

A pipe 9 is connected to the lower portion of the container 6 and leads to another container Ill which serves as a casing for the float ll. Due to the provision of the pipe 9, the level of the liquid cooling medium in the container II) depends upon that in the container 6 and the evaporator 5.

The container I0 is illustrated in greater dc tail in Figures 2 and 3 of the drawings. This container comprises a casing, which encloses the float I I and which is connected by the bolts l3 to the portion l4 serving as a support or hearing for the steering pivot or pin l5. The end I8 of the pivot I5 is rotatably mounted in a support I9, which is connected by the bolts 20 to the portion in of the container Hi. The arm I! of the float I0 is provided with a rectangular opening into which the rectangular portion ii of the pivot I5 is fitted, so that when the float H moves up and down following the level of the liquid in the container ill, the pivot l5 will rotate within its support M.

The pivot 15 is provided with a groove 2| which extends in the direction of the pivotal axis. The pivot I5 is also provided with a bore-hole 22 extending through the pivot at right angles to its axis and communicating with the passage or groove 23 which leads to the

chambers

24 and 25 formed within the portions I4 and l2 0! the container ID.

The portion Id of the container in is provided with two

openings

26 and 21, which are so located that they are interconnected by the groove 2! when the pivot I5 is turned by the lowering of the float ll, caused by the dropping of the level of the liquid within the container It.

The opening 26 is in communication with a pipe 28 which leads to the valve 38. This valve comprises a cylinder 29 and a piston 30 which is reciprocable within the cylinder 29 and which is engaged by a spring 3|. The piston 30 is connected by a piston rod 32 with a valve body 33. adopted to close the passage 34, which inter connects two passages 35 and 38 provided in the valve casing 31. The spring 3| tends to maintain the valve body 33 in the closed position.

The device 38 is a flow valve which is included in the conduit 39 connecting the condenser 40 with the container 6.

The opening 21 provided in the portion ll of the casing in is connected to a pipe or concooling medium in the evaporator 5, the level of the liquid in the containers 3 and I8 is substantially high. so that the'rod-ll oi the ,float II which follows the level of the. liquid, will ex'-' tend substantially horizontally. In that position, the groove 2| of the pivot I 5 is situated below the

openings

26 and 21. so that there is no communication between these openings or between the pipes ll and 28.

When the amount of the liquid in the evaporator 5 is diminished, the float II will gradually move downwards, thereby turning the rod l1 and the pivot l5. Due to this turning of the pivot l5, the groove 2| will move gradually upwards and at a time when the level of the liquid is at its lowest, it is situated opposite the

openings

26 and 21, so that it interconnects these openings.

Then the compressed gaseous cooling medium in the compressor 8 will ,-flow through the pipe ll into the opening 21 provided in the portion H of the casing 10. Thence. the compressed gas will flow through the groove 2| and the opening 26 reaching the pipe 28 which is connected with the opening 26. The' compressed cooling medium will flow through the pipe 28 into the interior of the cylinder 29 of the valve 38 and will exert a pressure upon the piston 30 moving this piston downward against the action of the spring 3|.

Since the piston 33 is connected*by the piston rod 32 with the valve body 33, this movement of the piston 30 and of the valve body 33 connected therewith will free the passage 34 so that a connection will be established between the passages 35 and 36 provided inthe valve casing 31. Since the passages 35 and 36 constitute a part of the conduit 33 connecting the condenser 48 with the container 6, the movement of the valve body 33 will establish a connection between the condenser 40 and the evaporator 5, with the re suit that the liquid cooling medium will flow from the condenser 40 to the evaporator 5.

' Thus the levelof theliquid in the evaporator 5 will be raised so that the float II will gradually move upward. At the same time, the groove 2| will move downwards due to the rotation of the pivot I5 until the connection between the

openings

26 and 21 is interrupted again.

The compressed gaseous cooling medium sit-.

uated in the cylinder 23 will leave the cylinder through the pipe 28, the opening 26 in the casing in, and the

passages

22 and 23 formed in the pivot ID. The valve 38 will be closed again and the connection between the evaporator 5 and the condenser 40 will be interrupted.

The cooling medium evaporated or situated in the

chambers

24 and 25 of the container Ill may leave these chambers through a pipe 42 which connects the container ill with the upper portion of the container 6.

The valve 38 is preferably provided with a spindle 43 which is used for manually interrupting the connection between the condenser 40 and the container 6 in case of repairs.

The regulation of the lever of the liquid in the e aporator is carried out in a simple and effective manner by means of the described construction and the size of the steering pivot may be comparatively small due to the fact that no large passages are required for the compressed gas, so that no difllculties are likely to arise in the operation.

structures above described are subject to wide variation and modification without departing from the scope or intentof the invention, all of which variations and modifications are to be included within the scope of the present invention.

What is claimedis:

1. In cooling plants, in combination with an evaporator, a compressor connected with said evaporator, and a condenser; a conduit for supplying the liquid cooling medium from said condenser to said evaporator, said conduit including a flow valve, a casing connected with said evaporator, a float within said casing, a steering pivot operatively connected with said float and supported by said casing, said steering pivot having a groove formed therein for interconnecting two openings formed in said casing, a conduit providing a communication between one of said two openings and the interior of said compressor,

means actuating said valve, and another conduit providing a communication between the other one of said openings and the valve-actuating means.

2. In refrigeration plants, in combination, an

' ing a flow valve, a float actuated by the level of the liquid in the evaporator, a steering pivot firmly connected with said float, said pivot having a groove formed therein, a casing connected with said evaporator and carrying said pivot, said casing having two openings formed therein, said openings being interconnected by said groove in a predetermined position of said float, means connecting one of said openings with said compressor ,to supply compressed'gaseous cooling mediumfrom said compressor to that opening, means actuating said valve, and means providing a communication between the other oneof said openings and the valve-actuating means to cause said a compressed gaseous jcooling medium to operate said valve-actuating means in said position of 3. In refrigeration plants, in combination, an evaporator, a compressor connected with said evaporator, a conduit for supplying the liquid cooling medium to said evaporator and comprising a flow valve, a float actuated by the level of the liquid in the evaporator, a steering pivot firmly connected with said float, said pivot having a groove formed therein, a casing connected with said evaporator and carrying said pivot, said casinghaving two openings formed therein, said openings being interconnected by said groove in a predetermined position of said float, means connecting one of said openings with said compressor to supply compressed gaseous cooling medium from said compressor to that opening, means actuating said valve, and means providing a communication between the other one of said openings and the valve-actuating means to cause said compressed gaseous cooling medium to operate said valve-actuating means in said position of the float, said pivot having a passage formed.

for removing the compressed gaseous cooling medium from said valve.

J OHANN HEINRICH.