Патент USA US2096297код для вставки
Oct. 19; 1937. H. GCLDN ER ET AL REFRlA'GERATING MACHINE Filed Dec. 16, 1956 2,096,297 2 Sheets-Sheet l loo1.2 m5 m a ,.< 4.’. law," WW w i! E: ___ 14/ W 'Oct. 19, 1937; H. GOLDNER |-_-r AL‘ 2,096,297 REFRIGERATING MACHINE Filed Dec. 16,‘ 1936 1' 2 Sheets-Sheet 2 62/0678» 9514/. @064) . 2,096,297 Patented Oct. 19, 1937 UNITED STATES PATENT OFFICE REFRIGERATING MACHINE Hans Giildner and Wilhelm Bock, Stuttgart, Germany Application December 16, 1936, Serial No. 116,225 In Germany December 20, 1935 6 Claims. (Cl. 62-115) This invention relates to a compression refrig machine becoming materially greater, a ribbed erating machine, driven by an electric motor, for cooling ring. » - ‘ pantry refrigerators, which is characterized by, Furthermore the bottom of the pot-shaped the provision of a pot-shaped evaporator, project evaporator may be drawn inwards, and in the re U! ing into the cooling chamber, with a closure cover. » cess thus formed a freezing pan may be lodged. at. the top, upon which is mounted the driving motor, together with the condenser or lique?er ar The possibility is thus provided, in a simple man ner and without taking up additional room, of ~ ranged around it, and on the under side of which . making ice when required. are suspended the compressor and the regulator Two embodiments of the invention are illus 10 of the refrigerating medium within the evapora tor, an extension of the motor shaft, for the pur pose of driving the compressor, passing through trated by way of example in Figs. 1 and 2 and in 10 Figs. 3, 4 and 5 respectively of the accompanying. the evaporator pot cover in a gas-tight manner. There is hereby obtained a structure which is 15 cheap and simple to manufacture and which oc Fig. 1 is a sectional elevation through the ?rst embodiment of the refrigerating machine; drawings, in which , . . Fig. 2 is a horizontal section on the line 2--2 in 15 cuDies very ‘little space. The pot-shaped evapora tor may be produced seamlessly in a simple man ner by drawing from sheet metal, and requires for ,Fig. 3 shows in central sectional elevation a~ pantry cooling cupboard adapted for the recep tion of the refrigerating machine, with the refrig the connection of tubes or the like no sort of dis continuity requiring to be sealed by soldering or . erating machine itself shown in elevation; 2O Fig. 4 shows the refrigerating machine of Fig. 20 welding. It cannot therefore become leaky, and the gaseous or liquid refrigerating agent con 3 on a larger scale, partly. in outside elevation and partly in central section; and . tained therein, for instance sulphurous acid, can Fig. 5 shows a cross section on the line 3-3 in not therefore escape into the cooling chamber, 25 thereby endangering food or the like that is_ to Fig. 4. , v 25 In Figures 1 and 2, l denotes the pot-shaped be cooled, The motor and condenser mounted upon the cover of the evaporator are readily ac cessible for repairs or the like, and the motor also for any changing of its windings for the pur 30 pose of enabling the machine to be used for a dif ferent kind of current or for a different voltage. Owing to the fact that the compressorand the regulator for the refrigerating agent are suspend ed from the evaporator cover inside the evapo 35 rator, there is the possibility, in addition to the simple and compact assemblage of these mem bers, of rendering the members suspended from the cover quickly and conveniently accessible for repairs and the like by removing the said cover. '40 ‘The mounting of the compressor in the evapora tor yields a particularly noiseless working of the compressor. The motor arranged outside the evaporator is not exposed to any injury from the gases of the refrigerating agent. evaporator, closed at the top by a lid or cover 2. The cover is secured by means of screws 35 to an. annular ?ange 4, forming the upper end of the evaporator pot. This ?ange 4 bears upon the 30 cover ‘I of the cooling chamber by means of an India rubber ring 5. The evaporator thus pro jects through an aperture 36 in the cooling cham ber cover into the cooling chamber itself, and is sealed from the atmosphere by the India rubber 35 ring 5. Above, upon the cover, is ‘mounted loose an electric motor l6 for driving the compressor, with a magnet casing 23, the evaporator cover forming at the same time'the lower bearing plate of the motor. Around the motor is arranged the 40 condenser l5. On the under side of the cover 8 and inside the evaporator are suspended the com pressor 2 and the regulator 3 for the refrigerating agent, the former owing to the fact that its cas 45 The compressor is preferably in a layer ‘of lubri- I ing is made in one piece with the cover, and the 45 latter by means of its supply pipe I8. The com eating oil provided above the ‘surface of the lique pressor and the refrigerating agent regulator are fled refrigerating agent, as a result of which a located in a layer of oil 34 provided above the very simple and reliable lubrication of the moving surface 33 of the liquid refrigerating agent accu 5 o. parts of the compressor and its driving shaft, not mulating in the evaporator. An extension 29 of .50 requiring special‘ attention, is rendered possible, the motor shaft passes through the cover 8 by and the durability of the machine is ensured. The means of a packing 25 for the purpose of driving pot-shaped evaporator. renders it possible to slip on to it, for the purpose of enhancing thecool 55 log effect, and without the space required for the the compressor. - The armaturel?of the motor is carried by a sleeve 31, which is mounted upon a step 38 on the 55 2 2,090,297 motor shaft, and is iournalled at its upper end in the magnet casing 23. Upon the upper end of the shaft 29 is secured by means of a nut 39 a fan. 22, which is located in an aperture 48 at the top of a hood 2|, which surrounds‘ the con denser l5, and is completely open at its lower end. This hood is preferably carried by a few arms secured to the cover 8 and distributed round ring 46, bent out into the ribs 45, for the purpose of reinforcing the cooling action. The bottom 9 of the evaporator is drawn in wards, and in the recess 49 thus formed is lodged a freezing pan III. This is carried by a dish or cup || made of insulating material, which is slipped into the recess from below. By means of radial upper attached ribs 41 of the dish carrier its periphery, and the condenser I5 is preferably II, the bottom of the freezing pan I0 is located 10 carried by its supply pipe I1 and its discharge at a distance from the bottom of the pan carrier, ‘pipe I8‘, which are to be secured to the cover 8. ' and is supported in the latter. Furthermore the The cover 8 is preferably so shaped that the pipes pan carrier has on its periphery notches I3, I1 and I8 can pass through it outside the mag through which the. cold air arising above the net casing 23. At its lower and upper ends the freezing pan can pass underneath the bottom of 15 magnet casing is provided with holes 24. For the freezing pan and flow away through the repairing work. or the like, the hood 2|, the nut aperture H. For the purpose of holding the pan 39 and the wind vane 22, the magnet 23 and the carrier fast in the recess of the evaporator, there armature l6 can be conveniently removed from may be soldered to the latteran ‘inwardly pro the cover 8. Similarly by unscrewing the evapo-v jecting pin l2, which can be lodged in a notch 48 rator cover 8, the machine parts suspended from in the wall of the freezing, pan carrier when the 20 the under side of the latter can be quickly and latter is inserted. conveniently made accessible. The entire ma The main portions of ‘the machine illustrated chine can be quickly and conveniently suspended in Figures 3 to 5 are the pot-shaped evaporator, in the pantry or cooling chamber or removed |, its upper closure cover 8, upon which is mount therefrom. ' ed the motor 23, and the compressor 2, ?tted The‘ regulator 3 for the refrigerating medium to the under side of this cover, this compressor encloses in the usual manner a float with'a nee dipping into the layer of oil 34. The latter, how . dle valve secured thereto below, which co-oper ates with a discharge pipe 32 connected with the 30 regulator and extending down to about the bot tom 9 of the evaporator. A crank pin 4| pro vided at the lower end of the shaft 29 drives the compressor piston 44 through the medium of a connecting rod 42 and a pivot bolt43, and is sup ported by means of a footstep bearing, which con sists of a ball 28, which rests upon a‘ spring 21, which in its turn rests in a cup-shaped extension 26 of the compressor casing 2. All the movable parts of the compressor, even the suitably con 40 structed bearing of the driving shaft 29 in the cover 8,_ undergo ample lubrication by the oil surrounding them. To an inner annular groove 38 in the compressor cylinder is connected a suc tion plpe 3| opening freely near the cover 8, and 45 to the ?oor i9 of the compressor casing, equipped _ with a non-return valve 29, is connected 9. pres 'sure pipe l1. ‘ ever, now rests in a. special oil. pan‘ 50, the gas suction space 5| above the layer of oil being placed in communication, by a pipe 52 passing through 30 the bottom of the oil pan in an oiletight manner, with a gas space 53 located below the oil pan and above the surface 33 of the condensed refrigerat ing medium. . ' The oil pan 50 is formed at its upperv edge with 35 an annular ?ange 54, by means of which it is lodged in a gas-tight manner between the cover 8 and the ?ange 4 at the top of the evaporator. The evaporator ?ange 4 rests by means of the India rubber packing ring 5 upon the top wall ‘I 40 of the cooling chamber 55 of the cooling cup board 62, in such a way that the evaporator pro jects into the cooling chamber through an apera ture 36 in the said wall. By means of’ a coupling 56 the shaft 29 of the motor is secured to a shaft extension 51 serving for driving the compressor. The ‘cover l9 of the compressor cylinder is pro vided in a manner not shown in the drawings, .with a suction aperture opening into the gas space Through the pipe 3| the compressor draws in‘ 5|. Furthermore there is connected to it a pres 50 gaseous refrigerating medium by suction when sure or delivery pipe H, which leads to the con the motor is working and forces it through the ‘ denser |5 encircling the motor. The discharge pipe |'| into the condenser l5. In the latter the - tube | 8. of the condenser leads to the refrigerating compressed gas, with the co-operation of the medium regulator 3 suspended from the cover 8 55 cooling which the condenser undergoes owing tov in the gasspace 53. At the top of the motor the fact that the wind vane 22 sucks air through shaft 29 is mounted a fan 22. There is slid up the hood 2l'in the direction of the arrows,-is from below on to ‘the evaporator, for the purpose The refrigerating machine as so far described works in the following manner:— lique?ed, while at the same time, through the holes 24 in the motor casing, air is sucked for 60 the purpose of cooling the motor. The regulator 3 for the refrigerating medium allows a quantity of enhancing the cooling action, a sheet metal ring 46, which carries convexities projecting out wards like ribs. The bottom 9 of the evaporator 60 of the liquid refrigerating medium ?owing to it through the pipe l8 to ?ow away through the pipe‘ 32, this quantity corresponding to the quan 65 tity of gas sucked in through the pipe 3|. The cavity 49, into which can be frictionally inserted a metal freezing it, when is provided un liquid refrigerating amedium accumulating in the. ‘evaporator now evaporates, and in'so doing with drawsheat from the wall of the evaporator, thereby cooling the air' surrounding the latter. 70 The bubbles of gas ascend through the layer of lubricating oil 34, into the gas chamber located above the latter, out of which they are icon tinually sucked away again through the pipe 3| in the manner hereinbefore described. Onto _v the pot-shaped evaporator | is slipped a cooling is drawn inwards, in such a way as to produce a derneath with a bottom cove ' g 58 of insulating material. The motor 23, and with it the con , denser I5 and the fan 22, are enclosed by a sheet‘ metal hood 59, mounted upon the top wall ‘I of the cooling chamber. This hood has a removable‘ cover 60, and lateralair inlet and outlet aper~ tures 6|. » I .. 70 The action of therefrigerating machine ‘illus trated in Figures 3 to 5 is fundamentally the same as that of the machine shown in Figures 1 and 2, only a better cooling effect is obtained. ‘This is primarily because the gas evolved by thelayer of 75 aoeaac'r refrigerating medium 33 in the space 53 now passes through the tube 52 directly into the gas suction space 5|, that is to say, it no longer has to bubble through the oil layer 34. The gas therefore takes up to a far smaller extent the‘ heat absorbed by the layer of oil 34 from the compressor. The gas in the gas space 5| is therefore cooler than the gas that accumulates above the-layer of oil 34 in the embodiment 10 shown in Figures 1 and 2, and can there transmit its heat directly to the evaporator pot l, diminish 3 extending downwards through the evaporator cover in a gas-tight manner to drive the com pressor, a regulator for the refrigerating medium, likewise suspended in the evaporator from the under side of the cover, a ribbed cooling ring surrounding the evaporator. 4. A compression refrigerating machine for pantry refrigerators, comprising a pot-shaped evaporator projecting into a chamber to be cooled, a cover closing the top of the evaporator, an 10 electric driving motor mounted upon the said ing the cooling action of the latter. This direct cover, a condenser encircling the motor, a com- ' transmission of heatfand likewise the direct pressor suspended in the evaporator from the transmission of heat from the oil layer 34 to the 1 under side of- the cover, the shaft of the motor 15 evaporator pot, is now prevented by arranging the layer of oil 34 in the special oil pan 50. extending downwards through the evaporator 15 ' cover in a gas-tight manner to drive the com The small quantities of oil which are carried ' pressor, a regulator for the refrigerating medium, along by the compressor piston, and pass through the condenser I5 and the refrigerating medium 20 regulator 3 into the layer of refrigerating medium 33 and ?oat upon the latter, are sucked away, so far as the 011 surface 62 formed thereby rises above the lower end of the tube 52, in consequence of the partial vacuum in the gas suction space 25 5 i, through the pipe 52 into the oil pan 50. There is thereby obtained an automatic regulating of the oil level in the pan, so that ample lubrication ~ of the compressor and its driving members is always ensured. 30 , What we claim is:— 1. A compression refrigerating machine for pantry refrigerators, comprising. a pot-shaped evaporator projecting into a chamber to be cooled, a cover closing the top of the evaporator, an elec 35 tric driving motor mounted upon the said cover, likewise suspended in the evaporator from the under side of the cover, the bottom of the evap- orator being drawn inwards to form a recess, 20 and a freezing pan lodged in the said recess. 5. A compression refrigerating machine for ' pantry refrigerators, comprising a pot-shaped evaporator projecting into a chamber to be cooled, a cover closing the top of the evaporator, an elec 25' tric driving motor mounted upon the said cover, a condenser encircling the motor, an oil pan con taining a layer of lubricating oil provided inside the evaporator and above the surface of the lique ?ed refrigerating medium in the evaporator, leav 30 ing intercommunioating gas spaces above and be low the said oil pan, a compressor suspended in the evaporator from the under side of the cover and immersed in the said lubricating oil, the shaft 1 - of the motor extending downwards through the 35 a ‘condenser, encircling the motor, a compressor * evaporator cover in a gas-tight manner to drive suspended in the evaporator from the under side of the cover, the shaft of the motor extending downwards through the evaporator cover in a 40 gas-tight manner to drive the compressor, and the compressor, and a regulator for the refriger- , ating medium, likewise suspended in the evap orator from the under side of the cover. 6. A compression refrigerating machine for 40 a regulator for the refrigerating medium, like wise suspended in the evaporator from the under pantry‘ refrigerators, comprising a pot-shaped side of the cover. a cover closing the top of the evaporator, an elec tric driving motor mounted upon the said cover, a condenser encircling the motor, an oil pan con 45 ' 2. A compression refrigerating machine for 45 pantry refrigerators, comprising a pot-shaped evaporator projecting into a chamber to be cooled, a cover closing the top of the evaporator, an i electric driving motor mounted upon the said cover, a condenser encircling the motor, a layer 50 of lubricating oil above the surface of the lique ?ed refrigerating medium in the evaporator, a compressor suspended in the evaporator from the under side of the cover and immersed in the said lubricating oil, the shaft of the motor extend 55 ing downwards through the evaporator cover in a gas-tight manner to drive the compressor, and a regulator for, the refrigerating medium, like wise suspended in the evaporator from the under side of the cover. ' g 3. A compression refrigerating machine for pantry refrigerators, comprising a pot-shaped evaporator projecting into achamber to be cooled, a cover closing the top of the evaporator, an electric driving motor mounted upon the said cover,‘a condenser encircling the motor, a com pressor suspended in the evaporator from the under side of the cover, the shaft of the motor evaporator projecting into a chamber to be cooled, taining a layer of lubricating oil provided inside the evaporator and above the surface of the lique ?ed refrigerating medium in the evaporator, a ?ange round the upper margin of the oil 'pan, this ?ange being lodged in a gas-tight manner 50 between the upper edge of the evaporator and the ‘edge of its cover, a tube passing in a. ?uid tight manner through the bottom of the oil pan to establish communication between a gas space above the surface of the oil and a gas space be. 56 tween the bottom of the oil pan and the surface of the lique?ed refrigerating medium in the evap orator, a compressor suspended in the evaporator from the under side of the cover and immersed in the said lubricating oil, the shaft of the motor extending downwards through the evaporator cover in a gas-tight manner to drive the com pressor, and a regulator for the refrigerating . medium, likewise suspended in the evaporator from the under side of the cover. HANS GéLDNER. WILHEIM BOCK.