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Патент USA US2110182

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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
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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.
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