Патент USA US2110182код для вставки
March 8, 1938. 0. M. SUMMERS 2,110,182 REFRIGERATING APPARATUS Original Filed Aug. 13, 1934 .. 2 Sheets-Sheet l March '8, 1938. o. M. SUMMERS REFRIGERATING APPARATUS ' 2,110,182 Original Filed Aug. 15, 1954 2 Sheets-Sheet 2 4 68 70 '\ V 76 J 82 56 / 46 , \X ‘ “40. 42 3mm OT 72) f7. $11M”) 5R3 atknmmd 2,110,182 Patented Mar. 8, 1.938 NlTED STATES PATENT OFFICE ' 2,110,182 BEFRIGERATING APPARATUS Otto M. Summers, Dayton, Ohio, assignor to Gen eral Motors Corporation, Dayton, Ohio, a cor poration of Delaware Application August 13, 1934, Serial No. 739,562 Renewed June 3, 1937 _ 5 Claims. ' (c1. zso-zos) This invention relates to refrigerating appa ratus and more particularly to a compressor of. the reciprocating piston type for a refrigerating machine. In the construction of refrigerating apparatus, it has been customary, heretofore, to provide at the inlet and outlet connections of the compressor manually operable shut-off valves and connec tions to permit of certain service operations on 10 the refrigerating machine. These valves have, heretofore, been provided as separate units at tached either to the compressor or some other part of the refrigerant connections as additional ?ttings. Also in compressors of the valved piston 15 type, it has been customary to locate the inlet connection in a wall of the crank case inasmuch » as the construction requires that incoming gas must enter the crank case. ' ,It is an object of the invention to provide a compressor having both the inlet and outlet con 20 nections therefor located in the head of the com pressor and to provide in the compressor cylinder head built-in manually operable valves for clos ing the inlet and outlet connections during serv 25 ice operations, as well as to provide in the cylinder head built-in connections to the inlet and outlet for attaching gauges, charging apparatus, purg ing devices and other accessories utilized‘in per forming service operations. 30 It is also. an object to provide a refrigerator compressor of the valved piston type having an delivery through a conduit. l2 to a condenser I4. The compressed refrigerant is lique?ed in_ the condenser l4 and collected in a receiver I6, whence it is delivered by a. conduit l8 to an evaporator 20, which may contain the customary 5 ‘?oat valve (not'shown) for regulating the ex pansion of liquid refrigerant therein. The con duit 22 delivers gaseous refrigerant to the inlet connection 24 of the compressor H]. A bellows 23 communicates with the conduit 22 to control 10 a switch 28 for intermittently operating a motor 30 which drives the compressor Ill for maintain ing substantially constant temperatures in the evaporator 20. . , v ' The compressor l0 may comprise a body mem- 15 bar 32 forming a crank case and one or more cylinders 34. Two cylinders are disclosed in the present embodiment. Pistons 36 are adapted to be reciprocated in the cylinders 34 by the cus tomary crank shaft and connection rods, well 20 knownin the art, and are formed with inlet valves 38 therein for the admission of gas from the crank case to the cylinder. At the top of the body member 32, there is mounted a valve plate '40 forming a seat for an exhaust valve 42 and 25 immediately above the plate 40 there is provided a cylinder head 44, which together with plate 40, is adapted to form a discharge chamber 46 above the valves 42. The head 44 and valve plate 40 and body 32 are formed with apertures which, 30 together, form a conduit 48 communicating with , the crank case of the compressor body 32. inlet connection located in the cylinder head and , A horizontal bore 50 is formed in the cylinder which communicates with thecrank case of the _'head to communicate with the conduit 48 and compressor through a built-in conduit formed in - inlet connection 24 and to contain a ‘manually 35 body. a theA compressor operable valve 52. The valve 52 cooperates with further object is to provide ?ltering means in a seat member 54 which may be formed at the the built-in inlet conduit of the compressor. end of the inlet connection 24, while the Further objects and advantages‘of‘the present inner opposite end of the valve stem is squared at 56 invention will be apparent ‘from the following for reception of a suitable tool for operating the 40 40 description, reference being had to the accom valve. A packing gland ‘58 is provided to seal panying drawings, wherein a preferred‘ form of the valve stem during operation and in order to the present invention is clearly shown. ' assure hermetic sealing of the valve operating In the drawings: end of the bore 50 at times when the valve 52 Fig. 1 is an end view partly in section of a is not'in use, a screw plug 60 is provided to seat 4_5 45 compressor embodying the present invention, the against the outer face of the cylinder head by major elements of a complete refrigerating appa means of a gasket 62. An additional bore 64 (see ratus being shown diagrammatically; __ ' Fig. 2) is formed in the cylinder head communi Fig. 2 is a horizontal cross section on line 2-2 cating between the bore 44 and the outside of the of Fig. 1; head. It is normally closed by ascrew plug 66; Fig. 3 is a top view of the cylinder head of the 50 A second bore 68 is formed in the cylinder head compressor; and for the reception of a manually operable vvalve Fig. 4 is a cross section on line 4-4 of Fig. 3. 10 adapted to cooperate with a seat formed on g The refrigerating apparatus disclosed in Fig. 1' the inner end “of an outlet connection 12. A may comprise preferably a compressor lli which packing gland ‘l4 and sealing plug 16 are provided 55 refrigerant for 55 is adapted to compress gaseous v2 8,110,182 in the same manner as for the valve 52. (Also, compressor body formingla cylinder and a crank . an additional bore 18 communicates between the case, a cylinder head, an inlet connection in said cylinder head and means forming a conduit from said inlet connection to the crank case for con ducting all incoming gas to the crank case bore 68 and the outside of the head and isnor mally closed by a screw plug. 80. The bore 68 communicates with the discharge chamber 46 as shown in Fig. 4 at 82. Each of the valves 52 and 10 is provided with a back seat 84 and 86 respec through the cylinder head and the compressor bodY- tively for closing communication between the tion. . In operation, the valves normally lie in the po sitions shown in Fig. 2 in which refrigerant is circulated through the inlet connection N and 15 valve 52 to the conduit 48 and the crank case of the compressor. Gas discharged into the cham ber 46 passes through the passage 82, and valve ' 10 to the connection ‘I2. During normal func » 2. In a refrigerator compressor of the recipro cating valved piston type, the combination of a compressor body forming a cylinder and a crank 1. case, a cylinder head, an inlet connection in said cylinder head, means forming a‘ conduit from said inlet connection to the crank case for con ducting all incoming gas to the crank case, and a manually operable valve in the cylinder head 15 for at times closing said inlet connection; bores 50 and 68 and the connections 24 and 12 10 respectively when the valvés are in open posi 3. In a refrigerator'compressor of the recipro cating valved piston type, the combination of a compressor body forming a cylinder and a crank tioning of the refrigerating apparatus, the op 20 eration is as just described. Upon occasions when it becomes necessary to case, a cylinder head, an inlet connection in said 20 perform service operations on the refrigerating ‘cylinder head, means forming a conduit from ~ apparatus, the plugs 66 and to may be removed said inlet connection to the crank case for con ducting all incoming gas to the crank case, a - to attach gauges or other service accessories 25 and when attached communication may be es manually operablevalve in the cylinder head for at times closing said ‘inlet connection, a bore in _ tablished with the rest of the system by remov ingreither or both of the'plugs 60 and ‘I6 and the cylinder head communicating between said conduit and the outside of the compressor, and moving the valves 52 and 10 to a position mid way between the two seats therefor. Also if means for closing the outer end of said bore. 4, In a refrigerator compressor of the recipro 30' for any reason, it is desired to shutfoii’ com munication between the compressor and either jcating valved'piston type, the combination of a 30 the exhaust conduit I! or the intake conduit 22, compressor body forming a cylinder and a crank case, a cylinder head, an inlet connection in said either the valve 10 or the valve 52 may be com pletely closed. ' cylinder head and means forming a conduit from 35 It will thus be seen that there has been pro said inlet connection to the crank case extending vided a compressor in which the necessary man- L through the cylinder head and the compressor 35 body for conducting all incoming gas there ual intake and discharge valves are provided as through to the crank case, and a manually oper built~in parts of the compressor, andthat not onlyathe discharge valve, but the intake valve \able valve in the cylinder head ‘for at times clos 40 as well are located at thevcylinder head. This ing said inlet connection. 5. In a refrigerator compressor of the recipro contributes materially to a neat appearance of cating valved piston type, the combination of a the complete refrigerating apparatus and elimi compressor'body forming a cylinder and a crank case, a cylinder head, an inlet connection in said nates a considerable number of detachable con nections otherwise necessary. 45 , >. While the form of embodiment of the inven 40 . cylinder head, an outlet connection in said cylin der head, means forming a conduit from said in let connection to the crankcase for conducting all might be adopted, all coming within'the scope of incoming gas to the crankcase, a'valved recip rocating piston compressing gas from said crank the claims which follow. 50 case and discharging compressed gas through What is claimed is as follows: ’ tion as herein disclosed, constitutes a preferred form, it is to be understood that other forms '- 1. In a refrigerator compressor of the recipro cating valved piston type, the combination of a said outlet connection. . . 50 O'I'I'O M. SUMMERS.