close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2135515

код для вставки
Nov. 8, 1938.
H; B. HULL ET AL -
2,135,515
REFRIGERAT ING APPARATUS
Original Filed Jan. 31, 1931
3 Sheets-Sheet l
w?ww
.
BY
NYENLBFM
'
~
ATTORNEY
I
Nov. '8, '1 938.
H. YB. HULL ET AL
2,135,515
REFRIGERATING APPARATUS
Original Filed Jan. '31‘ 1931
5 Sheeté-Sheet 2
‘11*
0"511°m
. + WAMAJQVE TORQJ'QHCW
d
BY
'
ATTOR N EY
Nov. 8, 1938.
’
H. B.'HULL ET AL
2,135,515
REFRIGERATING APPARATUS
Original Filed Ja?. 51, 1931
3 Sheets—Sheet 5
ATTORNEY
Patented Nov. v8, 1938
2,135,535
UNlTED STATES PATENT 'orrica
2,135,515
REFRIGERATING APPARATUS
\
Harry B. Hull and Alex ~A. McCormack, Dayton,
Ohio, assignors, by mesne assignments, to Gen
eral Motors Corporation, a corporation of Dela
ware
Application January 31, 1931, Serial No. 512,633
Renewed May 26, 1937
17 Claims. (Cl. 230—147)
This invention relates to refrigerating appa
metically sealed casing. However, it is to be
ratus of the compression type and more partic
ularly to motor-compressor units for use with understood that the inventionv is not limited to
such a compressing‘ unit. The compressing unit
refrigerating apparatus of such type.
22 comprises motor 30 which includes rotor 33
One of the objects of the present invention is
to provide an improved compressing apparatus and stator 35, and a compressing means 31 ac- 5
tuated by motor 30. The compressing unit with
which is inexpensive to manufacture, economical draws
gaseous refrigerant from the evaporator
to operate and easily assembled. - I
1O
Another object is to provide an improved com
pressing means of the oscillating ring type hav
ing a plurality of compression spaces, and to
. provide
means
for ‘ sealing
said
compression
spaces from one another, which means also seals
the intake from the discharge sides of said com
pressing means.
through a vapor conduit 42, compresses the gas
eous refrigerant and delivers it to the condenser
wherein it is lique?ed and from which it is de- 10
livered to a receiver 43 which is connected to
the evaporator-‘by means of a supply conduit 45
under the control, of an expansion valve 636.
The compressing ‘means 31 is shown as driven
by the electric motor 30 and the starting and 15
Another object is to provide aneccentric cs;
cillating ring type compressing means with_ stopping of the motor is controlled by an auto
counter-balancing means to lessen vibrations.
20
Another object is to provide improved means
for loading and unloading the compressing
means.
Further objects and advantages of the present
invention will be apparent from the following
description, reference being had to the accom
panying drawings, wherein a preferred form of
the present invention ‘is clearly shown.
In the drawings:
'
Fig. 1 is atop plan view, partly in elevation
(.3 O and partly broken away, of a compressing appa
' ratus embodying features of the invention;
~ Fig. 2 is a view of a refrigerating system em
bodying features of the invention showing, the
system partly diagrammatic and an enlarged
view in cross-section of the compressing appara
tus shown in Fig. 1, the view of the compressing
matic switch 4‘! controlled by a thermostat bulb
48 in the vicinity of the evaporator 26.
The motor-compressor unit 22 is enclosed
within the ?uid-tight casing to which includes 2°
an upper cover 50, and an intermediate member
52 and a lower member 54 suitably clamped to
gether by screws 55 and 56. The lower member
54 and the intermediate member 52 cooperate
to form a reservoirv 51 for a body of lubricating 25
oil preferably mineral oil.
The intermediate
member 52 serves also to provide an intake
chamber 59, which is provided with a check valve
60 located at the inlet thereof to permit refrig
erant to enter said chamber but preventing re- 30
turn thereof. The intermediate member 52 is
provided with a horizontal web or plate 62 at the
top thereof which serves to divide the casing 40
into two separate chambers for compressed ?uid,
apparatus being taken along the line 2-2 of ~ namely, 65 and 66. Both chambers are located 35
Fig. 1;
1
.
Fig. 3 is a view in cross-section of a portion
of the compressing apparatus shown in-Fig. 2,
the view being taken in the direction of the ar
rows 3-3 of Fig. 2;
Fig. 4 is a view similar‘ to Fig. 3 and showing
a modi?ed form of sealing means for the com
pressing apparatus; and
.
Fig. 5 is a fragmentary view of a portion of
the ‘compressing apparatus‘ shown in Fig. 1 and
showing a siderview in elevation'of- the discharge
valve
mechanism.
,
>
'
Referring to the drawings, the numeral 20 des
3 ignates in general a refrigerating system-which
includes therein. a- motor-compressor unit 22,
condenser 24 and cooling or evaporator element
26. The motor-compressor unit herein shown is
of the type in which both the motor and com
pressor are enclosed within a ?uid-tight, her
on the same side of the compressor, and for in
stance, on the high pressure side as shown in the
drawings. The web 62 is provided with an an
nular groove 70 which provides a compression
chamber for the compressing means 31.
40
The compressing means 31 is of the oscillating
ring type which is one of the types which must be
'?ooded with a lubricant to accomplish any ap
preciable'compressing action as a gaseous medium
as described hereinafter. The compressing 45
means includes a disc-shaped member 12 which
forms the top wall of the compression chamber
70.
The member 12 is provided with a down
wardly depending ring 14 which oscillates within
-he compression chamber for‘ compressing the 50
?uid therein. The ring 14 is so positioned with
in the chamber ‘I0 so as to provide a-plurality
of compression spaces within ‘the compression
chamber 10. As shown in Fig. 3 it will be noted
that a compression space is provided adjacent 55
8,185,515
2
noted that rotation‘ of shaft 85 due to the eccen
the outer periphery of said ring and a second tric
arrangement-thereon that the ring ‘I4 oscil
compression space is provided adjacent the inner
lates
within the compression chamber ‘III in the
periphery of said ring. Thus it will be noted that
there is provided a compression space adjacent manner previously described. In order to coun
said eccentric arrangement there is
each periphery of the ring ‘I4 as shown in Fig. 3 tor-balance
provided counter-balancing means I05 which is
where one compression space is indicated at ‘I5
carried by shaft 85 diametrically opposite to the
and a second compression space is indicated at
‘I6. Each of the compression spaces is provided eccentric portion of the shaft 85. The counter;
with a separate discharge valve 11. Compression _ balancing means I05 includes a portion I88 above 10
the disc-shaped member ‘I2 and a similar portion
10 abutments are provided in the form of an oscil
I01 which is located below said disc-shaped mem
lating or rocking pin 80 disposed within the com
As previously stated the disc-shaped mem
pression chamber ‘III to seal one compression space ber.
ber 12 forms the top Wall of the compression
from the other and arranged so as to be in en
chamber ‘I0 and as will be noted said disc-shaped
gagement with at least one of the ends of the
member rests upon the web 62 by gravity alone. 15
ring
during
pumping
operation
so
as
to
prevent
15
Means have been provided for sealing the
leakage from one compression space to the other.
joints
between the disc 12 and the web 62 to thus
The oscillating pin as shown in Fig. 3 is disposed
the compression chamber so as to enable the
Within the chamber ‘III with its ends in slidable seal
engagement with opposite vertical walls of the compressing means to perform its compressing 20
action. In order to provide means for sealing
20 annular groove or compression chamber 10. Dur
joint we‘ employ the lubricant within the
ing the operation of the compressing means the said
reservoir for submerging the compressing means
pin 80 oscillates with its ends slidably engaging ,
the walls of the compression chamber ‘I0 while
the ring member ‘I4 oscillates within the com
25 pression chamber 10 with respect to the axis of
the pin 80. Throughout operation of the com
pressing means there is a plane contact between
at least one end of the ring ‘I4 and one side of
I the oscillating pin 80. That is, the end of the
30 ring 14 is flush with the side wall of the oscil
lating pin 80 during pumping action and is in
a sliding engagement during pumping operation
and in stationary engagement therewith when
the compressor is in its idle condition. Thus the
35 oscillating ring 14 oscillates within the com
pression chamber ‘III with respect to the axis of
the pin 88, and the oscillating pin oscillates with
its ends slidably engaging opposite vertical walls
of the compression chamber. By' this arrange
40 ment there is provided two distinct compression
spaces, and, also by the present arrangement one
compression space is entirely sealed from the
other and the intake side of the compressing
means is also sealed by the same means from the
discharge side.
~
'
Referring now to Fig. 4, there is shown a
modi?ed form of compressing means. In this
modi?cation the oscillating pin 82 is formed in
in lubricant. This is accomplished by providing
a spiral groove III) on the lower end of shaft 85.
This groove receives lubricant from the reservoir
51 through strainer III and passage “la. The
groove IIU communicates with a radial bore_I I2
in shaft 85, which bore leads to a central passage
H5. The central passage permits lubricant to
flow through the open end at the top of the 30
passage and into the chamber 65. The lubricant
thus supplied to the chamber 65 acts to lubricate
the compressing means and to seal the joint vbe
tween the disc-shaped member 12 and the web
62. ,The central passage H5 in shaft 85 also
communicates with a radial bore I25 in shaft 85
for supplying lubricant to the bearing 81 while
the spiral passage I III in shaft 85 serves to supply
lubricant to bearing 90. The disc-shaped mem
ber ‘I2 is provided with a plurality of vertical 40
passages IIIIA which extend from the top of said
disc-shaped member to the underside thereof
which is in engagement with the web 62'to thus
permit lubricant to flow therethrough to lubri
cate the joint between the disc and web. In
order to lubricate the bottom wall'of the com
pression chamber ‘III a plurality of vertical pas
sages I I2 have been provided in the disc-shaped
member 12 and which extend from the top there- _
two pieces and is held in engagement with one of through the bottom of the oscillating ring 14.
50
50 end of the oscillating ring by means of a spring
separate'passage H3 is provided in disc ‘I2
83. This arrangement provides a self-adjusting > A
which leads to a plurality of passages I I4 formed
contact between the ring and pin on the dis- at right angles to each other in .pin 80 to lubri
charge side of the compressing means to thus . cate between the ends of the pin 80 and walls of
prevent any recompression of gas. Other details
chamber ‘I0, and between the sides of the pin 80 55
55 shown in this modi?cation correspond to those
and the ends of ring ‘I4.
>
shown in Fig. 3.
The operation of the compressor is as follows: '
The compressing means 31 is arranged to be
actuated by a shaft 85 which is driven by rotor
33 of motor 30. The shaft 85 is journaled on its
60 one end in a bearing 81 which is carried by web
62 and on its opposite end is journaled in a hear
ing 90 carried by the lower member 54 of the
casing 40. The shaft 85 maintains its position
within the’ bearings 81 and 98 by means of
65 gravity, the end of said shaft resting upon a but
ton 95 carried by the lower member 54 of casing
40. The shaft on its upper end is provided with
an eccentric portion 100 which carries the ball
bearingmember I02. The ball bearing member
I02 engages the disc-shaped member 12 by a slip
?t at 12a to thus engage the ring ‘I4. As shown
vin the drawings the compression chamber is
concentric with the main portion of the shaft 85
while the ring member _'I4 is concentric with the
75 eccentric portion of shaft 85. Thus it will be
The gaseous refrigerant, for example CHzClF, is
withdrawn from the vapor conduit as previously
stated and is drawn into the intake chamber 59 60
which communicates with the pressure chamber
‘I0 through an intake passage I40 which com
municates with a passage I42 provided in the
ring ‘I4. The passage I42 extends from one side
to the other of ring ‘I4 so as to supply fluid to be 65
compressed to each compression space in ‘the
compression chamber ‘I0. By this arrangement
gaseous refrigerant or the refrigerant from the
intake or low pressure side of the receiver is ad
mitted to the compression chamber to be com
pressed. The compressed refrigerant is then dis
charged through valves ‘I'I which are covered by
a ?lm of lubricant received from the oil pump
III] to thus dampen valve noises. The valves
'I'I are provided with a cut-awayportion . I45 15
2,135,515
' which tends to form a small reservoir for lubri
3
date such a quantity of high compressed gas.
Thus it will be noted that the compressing means
is acting upon high compressed gas and the com
pressing of low pressure gas into'high pressure
gas will not take place until the high pressure
gas has all been withdrawn from the chamber 59
and lowipressure gas is admitted into the com
cant adjacent said valve seats. The valves
proper are formed of thin reeds which will be
?exed during operation of thelcompressing means
and in order to provide a stop for said valves
there is provided an angular projection I50. The
high pressuregas discharged through the valves
‘I1 is then passed to the high pressure chamber
pression chamber ‘I0.
66 through the ball bearing member I02, which
10 ball bearing member I02 also serves as an over
?ow drain for lubricant from the chamber 65 to.
be returned to the reservoir 51. The high pres
sure gas also passes through conduits I55 before
entering the high pressure chamber 66. The i
15 high pressure gas passes from the chamber 66
into the condenser 24 as previously stated through
a suitable outlet passage I51. In order to pro
-
The rotation of shaft 85 is clockwise (Figs. 3
and 4) giving the ‘ring 14 a tendency to rotate 10
alsoclockwise, thus maintaining a contact be-'
tween its end ‘Ma and pin 80. The plane contact
also insures correct oscillation of the pin with
the ring.
While the preferred form of the invention in 15
cludes two compression chambers, it is to be
understood that many advantages of the inven
- tect the‘ windings of the motor there is provided
, tion'may be obtained when only one compression
a shield I60 which is carried by the rotor 33 and
20 extends above the lowermost portion of the con
duit I55. This shield I60 prevents the oil which
is being drained from the chamber 65 to reser
voir 51 from splashing upon the windings of the
motor and permits same to pass through pas
25 sages I02 provided in the .rotor 33 to the reservoir
51, and since the uppermost portion of the shield
I60 is above the lowermost portion of the conduit
I55 the shield I60 tends to act as a separator for
separating some of the lubricant which may be
30 come entrained with the gas in passing from con
duit I55 to outlet I61. However, in the event
some lubricantshould become entrained with the
gas and pass into the chamber 66 on the outside
of the-shield I60 it- is returned to the reservoir
51 by means of one or more passages I6l pro
vided in the stator 35.
20
tion as herein disclosed constitutes a preferred
form, it is ‘to be understood that other forms
might be adopted, all coming within the scope
of the claims which follow.
What is claimed is as follows: .
'
25
1. A compressor ‘for refrigerating apparatus
comprising in combination a casing, means pro
viding a chamber within said casing, an' oscillat
ing ring disposed in said chamber, means for 30
actuating said ring, said ring together with said
?rst named means providing a compression space
temperature. Thus it is customary to start the
compressor when the temperature in the refrig
erator reaches a predetermined high limit and to
stop the compressor when the temperature
reaches a predetermined low limit. Since the
discharge or high pressure side of the compressor
adjacent the inner periphery of said ring and pro
viding a compression space adjacent the outer
periphery of said ring, and a rocking pin co 35
operating with said ring for sealing said compres
sion spaces from one another, there being a plane
contact between said ring and said pin so as to
provide a slidable engagement therebetween, and
self-adjusting means for taking up clearance slack
for maintaining said contact said self-adjusting
means cooperating with said ring and pin.
2. A compressor for refrigerating apparatus
comprising in combination a ?uid-tight casing,
means dividing said easing into a plurality of
compartments, a shaft extending through said 45
means, a motor below said means for driving said
is under condenser pressure and the suction .or
low pressure side is under evaporator pressure,
it is obvious that the compressor whether of the
shaft, an eccentric on said shaft, a ball bearing
member carried by the eccentric on said shaft,
means forming a compression chamber, and an
In refrigerating apparatus of the type herein
described it is customary to operate the com
pressor intermittently to maintain the evapora
40
chamber is used, either on the inner or outer
periphery of the ring. ~
- While the form of embodiment‘ of the inven
tor, or the refrigerator cabinet which generally
houses the evaporator at a substantially constant
rotarytype, oscillating type, the vibrator type or
of any other type, start'under load and conse
quently the motor requires a high starting torque
unless some means is provided for permitting
the motor to reach a running speed before the
load is taken up. In order to provide means for
loading and unloading the compressing means
we have‘ provided the intake chamber 59 and
have'arranged for the high pressure gas in the
60 chambers 65 and 66 to escape therefrom, during
oscillating ring in said chamber actuated by said
bearing member, said compression chamber com
municating with 'one of said compartments and
said compartment discharging compressed ?uid
60
to a second compartment through said ball bear
ing member, said casing providing an outlet pas
sage in said latter compartment.
'
3. A compressor for refrigerating apparat
comprising in combination a drive shaft, an ec
centric on said shaft, a ball bearing member car
periods of idleness of the compressor, through the . ried by the eccentric on said shaft, means form 60
compressing means and compression chamber ‘I0 ing an annular chamber, a disc-shaped member
into the intake chamber 59 so as to equalize the having a downwardly extending ring oscillated
pressure within the chambers 59, 65 and 66. This by said eccentric, the disc-shaped member form
leakage through the pump takes-place between ing the top wall of said- chamber and said ring ex-.
the joint of the disc-shaped member and a web tending into said chamber, said ring together
member 62 and some leakage occurs through the with said chamber forming a plurality of com~
passages I I2 which leads'to the bottom wall of pression spaces during the operation of said disc
the compression chamber 10 from the chamber _shaped member, a pin passing through said ring
65. By this arrangement su?icient high pressure and having a sealing engagement with said ring
gas- will pass into the chamber 59 so as to enable
the compression chamber '|0_to be supplied with
high pressure gas until the motor attains a run
ning speed. This is accomplished by providing
an intake chamber of su?lcient size to accommo
to seal said compression spaces from each other
and individual outlet check ‘valves for each com
pression space carried by said disc-shaped mem
ber whereby pressure differentials may be estab
lished between said compression spaces.
4
2,135,515
4. A compressor for refrigerating apparatus
comprising in combination a member having a
flat top portion and having a rectangularly cross
sectioned annular groove in said portion, an oscil
lator having a flat bottom portion in sealing en
gagement with said flat top portion and having a
downwardlyv extending ring in sealing contact
with both side walls and bottom of said annular
groove to form two compression spaces on each
1.0 side of said ring, means in sealing contact with
said membervand with said ring forming com
pression abutments in said compression spaces,
means forming a compression chamber above said
member, means forming discharge passages from
15 said compression spaces to said compression
chamber adjacent said compression. abutments,
and check valves for said discharge passages.
5. A compressor for refrigerating apparatus
comprising in combination a member having a
20 flat top portion and having a rectangularly cross
a horizontally disposed disc-shaped member hav
ing a downwardly extending ring oscillated by
said eccentric, the disc-shaped member forming
the top wall of said chamber and said ring ex
tending into said chamber, said ring together
with said chamber forming a plurality of com
pression spaces during the operation of said disc
shaped member, intake means for said compres
sion spaces, upwardly directed discharge means
in said disc-shaped member from said compres 10
sion spaces, check valves carried by said disc
shaped member on said discharge means, and
means to maintain a body of oil on said check
valves.
10. A compressor comprising a drive shaft, an 15
eccentric on said shaft, means forming a vertical
cylindrical chamber, means forming a lower hori
zontal wall for said chamber, means forming an
upper horizontal wall for said chamber, a ring
oscillated by said eccentric against said vertical
sectioned annular groove in said portion, an o..
cylindrical chamber between said upper and lower
cillator-having a ?at bottom portion in sealing.
engagement with said ?at top portion and having
horizontal walls, a gas outlet valve on said upper
wall, and means for flowing a ?lm of lubricant
over said valve.
11. A compressor comprising a drive shaft, an 25
eccentric on said drive shaft, means forming an
a downwardly extending ring in sealing contact
25 with both side walls and bottom of said annular
groove to form two compression spaces on each
side of said ring, means in sealing contact with
said member and with said ring forming com
pression abutments in said compression spaces,
80 means'forming a compression chamber above said
member, means forming discharge passages from
said compression spaces to said compression
chamber adjacent said compression abutments,
check valves for said discharge passages and
means for maintaining a supply of oil over said
check valves.
6. A compressor for refrigerating apparatus
comprising in combination a motor driven shaft,
an eccentric portion on said shaft, means form
ing an annular compression chamber, an oscillat
ing ring concentric with said eccentric portion,
annular cylindrical chamber having inner and
outer coaxial vertical cylindrical walls, means
forming a lower horizontal wall for said chamber,
means forming an upper horizontal wall for said 30
chamber, a ring having coaxial cylindrical walls
oscillated by said eccentric against said inner and
outer coaxial vertical cylindrical walls between
said upper and lower horizontal walls, a gas outlet
valve on said upper wall, and means for ?owing a 35
?lm of lubricant over said valve.
12. A compressor comprising a drive shaft, an
eccentric on said shaft, means forming a vertical .
cylindrical chamber,_means forming a lower hori
zontal wall for said chamber, av plate forming an
upper horizontal wall for said chamber, a ring
carried by said plate and oscillated by said eccen
said ring being located in said chamber and
tric against said vertical cylindrical chamber and
actuated by said eccentric and forming two com
pression spaces on each side of said ring, means against said lower horizontal wall, a gas outlet
valve on said plate and means for ?owing a ?lm 45
45 sealing said spaces from each other and oil pas
of lubricant over said plate.
sages in said ring.
‘
13. A motor-compressor unit comprising a cas
'7. A compressor for refrigerating apparatus
comprising in combination a motor driven shaft, ing, said casing enclosing a motor and a com
an eccentric portion on said shaft, means form ' pressor drivingly connected together, said com
pressor comprising a drive shaft, an eccentric on 50
ing an annular compression chamber, an oscillat
ing ring concentric with said eccentric portion, said shaft, means forming a vertical cylindrical
said ring being located in said chamberand chamber, means forming a lower horizontal wall
for said chamber, a plate forming an upper hori
actuated by said eccentric and forming two com
pression spaces on each side of said ring, means zontal wall for said chamber, a ring carried by
sealing said spaces from each other, means for said plate and oscillated by said eccentric against 55
55 discharging compressed fluid from one edge of
said vertical cylindrical chamber and against said
the ring and back through the center of said ring. lower horizontal wall, a gas outlet valve on said
8. A compressor for refrigerating apparatus plate, a reservoir for a body of lubricant, and
comprising a drive shaft,/an eccentric on said means for lubricating said motor from said body
drive shaft, means forming an annular chamber, of lubricant and for maintaining a film of lubri
a disc-shaped member having a downwardly ex
cant over said valve.
tending ring oscillated by said eccentric, the disc
14. A motor-compressor unit comprising a cas-' '
shaped member forming the top wall of said
ing,
said casing enclosing a motor drivingly con
chamber and said ring extending into said
65
chamber, said ring together with said chamber
forming a compression space during the opera
tion of said disc-shaped member, intake means
for said ‘compression space, upwardly directed
nected to a compressor comprising a drive shaft,
an eccentric on said drive shaft, means forming
an annular cylindrical chamber having inner and
outer coaxial vertical cylindrical walls, means
discharge means from said compression space ‘ forming a lower horizontal wall for said chamber,
carried
by said disc-shaped member, a check valve a plate forming an upper horizontal wall for said
70
on said discharge means, and means to maintain chamber, a ring carried by said plate having co
axial cylindrical walls oscillated by said eccentric
a body of oil on said check valve.
9. A compressor for refrigerating apparatus
comprising a drive shaft, an eccentric on said
7; drive shaft, means forming an annular chamber,
against said inner and outer coaxial vertical cylin
drical walls between said upper and lower hori
zontal walls, a gas outlet valve on said plate, and
0
2,185,515
means for maintaining lubricant over said valve
and for circulating lubricant to said, motor.
15. A compressor for refrigerating apparatus
comprising a drive shaft, an eccentric,on said
drive shaft, means forming an annular cham
ber, a disc-shaped member having a downwardly
extending ring oscillated by said eccentric, the
disc-shaped member forming the top wall of said
chamber and said ring extending into said cham
10 ber, said ring together with said chamber form
ing a compression space during the operation of
said disc-shaped member, intake means for said
compression space, upwardly directed discharge
‘is
means from said compression space carried by
said disc-shaped member, a check valve on said
discharge means, and means causing the ?uid
compressed by said compressor to pass through
said disc-shaped member after‘ having been dis
charged through said check valve.
16. A compressor for refrigerating apparatus
_ comprising a sealed casingidivided by a ?at plate
5
having a cylinder formed therein, a disc-shaped
piston member oscillating on said plate and coop
erating with said cylinder, means for discharging
compressed ?uid from said cylinder to one side
of said disc-shaped member, means for passing 5
said compressed ?uid through said disc-shaped
member to the other side of said ?at plate and an
outlet from the casing on the last named side of
said ?at plate.
17. A compressor having a cylinder, and a pis 10
ton plate oscillatable with respect to said cylin
der, a refrigerant inlet means in the side of ‘said
plate, means for discharging gaseous compressed
refrigerant on one side of the'plate, and then pass
ing thmgaseous refrigerant through the center of 15
said compressor to the other side of said plate
a casing on said last named side of said plate
receiving said gaseous refrigerant, and a gaseous
refrigerant outlet in said casing.
HARRY B. HULL.
, ALEX A. McCORMACK.
20
Документ
Категория
Без категории
Просмотров
0
Размер файла
982 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа