US2479128A

US2479128A - Vehicular refrigerating apparatus

Info

Publication number: US2479128A
Application number: US565634A
Authority: US
Inventors: Maniscalco Pietro
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-11-29
Filing date: 1944-11-29
Publication date: 1949-08-16
Anticipated expiration: 1966-08-16

Description

P. MANISCALC VEHICULAR REFRIGERATING APPARATUS Aug. 16, 1949.

5 Sheets-Sheet 1 lFiled Nov. 29, 1944 Aug. 16, 1949. P. MANlscALco Y 2,479,123

- VEHIGULAR REFRIGERATING APPARATUS vN 29 1944 l s' sheets-sheet 2 Filed ov.

3 Sheets-Sheet 5 P. MANISCALCO VEHICULAR REFRIGERATING APPARATUS Aug. 16, 1949.

Filed NOV. 29, 1944 Patented Auge 16) UNITED STATES PATENT OFFICE 16 Claims.

The present invention relates to refrigeration Y kets, stores, community storage centers and the like and comprises a plurality of chambers or compartments for housing the refrigerating producing means or device, one or more refrigerating compartments for usual cold storage, one or more compartments for deep freezing, and the like; and may have also means, such as heating means, to compensate for or counter-balance the differential of outside and inside temperatures when the outside temperature falls below the desired temperature within the compartment or compartments.

Other objects, advantages, capabilities, features and the like are comprehended by the invention as will later appear and as are inherently possessed by the invention.

Referring briefly to the drawings:

Fig. 1 is a vertical sectional view through the device constructed in accordance -with the in vention;

Fig. 2 is a horizontal sectional view of the same;

Fig. 3 is a transversev sectional view, on an enlarged scale, taken in a plane'represented by line 3-3 in Fig. 1 of the drawings;

Fig. 4 is a horizontal sectional view, similar to Fig. 2, of a structure having a deep freezing compartment;

Fig. 5 is a diagrammatic view of the refrigerating system;

Fig. 6 is Va fragmentary side View of shock absorbing supporting means; and

Fig. '1 is a transverse sectional View of a refrigerant duct. u

Referring more in detail to the drawings, the embodiments chosen to illustrate the invention are shown by Way of illustration with a. railroad car having a body I supported by way of wheels 2 on tracks 3. This may be a flat top type of car although other types may be used.

On this body I is a housing having a floor 4, sides 5 and 6, and end Walls 1 and 8, and a ceiling or roof 9. The iioor (see Fig. 3) may slant to drain outlets I connected to drain pipes II. The side walls and 6 may have refrigeratortype doors I2 and I3 (see Fig. 2) suitably hinged to the side walls and also suitably packed and insulated.

At one end of the structure may be provided a compartment I4 for housing the refrigerating plant, later described, and having Walls I5 and I6. The roof 9 above the chamber or compartment I4 may have a hatch type of door I1, suitably packed and insulated through which access may be had to the compartment I4 by means oi' a ladder I 8. Also accessmay be had to the compartment I4 by way` of a side door I9 (see Fig. 2) suitably hinged to the side wall 5 and packed and insulated. The wall I6 may also have a door 20 .(see Fig. 2) to afford a passage between the compartment I4 and the freezing compartment or chamber 2I and also being suitably packed and insulated.

In the compartment I4 is located the refigerating plant comprising a motor element 22, such as a gas engine, which may be supported by way of shock absorbing means 23 (see also Fig. 6) upon a support or base 24 suitably supported upon or secured to the floor 4. Within or adjacent to'this base 24 may be provided av tank 25 for the refrigerant fluid. The engine 22 is operatively connected-to a suitable compressor 26 by way of a suitable drive 21, such as pulleys and a belt, or sprockets and a chain.

From the engine 22 runs an exhaust duct 28 leading to a muler 29 which in turn extends to and through the roof 9 for exhaust of the products of combustion to the atmosphere. In branched connection with the exhaust duct 28 is an auxiliary exhaust duct having duct parts or segments 30 and 3| which extend to the floor 4 and which are connected to a longitudinally extending duct part or segment 32, the latter being preferably of rectangular cross-sectional form to t in a channel provided in the floor 4, and having at its outlet 'end a suitable flexible duct or housing 33 for conducting the exhaust 'gases to the exterior (see Figs. land 2). ff"

In the duct parts 29 and 30 are valves 34'a'rid 35, which may be of the damper or butterflygtyp'e and to these values are connected suitable-levers or arms 36 and 31 which are in turn pivotally `connected to a connecting rod 39 hitched to a spring 39 and pivotally linked to an armature 40 operable in an electrical coil, solenoid or the like 4I. The valvesl 34 and 35 are so related to the levers 36 and 31 that when one valve opens 'or closesthe other valve closes or opens whereby when the exhaust gas is passing out by way of the duct 29 it is shut off from the duct 30--3I--32, and conversely when the exhaust gas is passing out by way of the duct 30-3I--324it is shut oi from the duct 29.

The refrigerant fluid flows by way of a return duct 42 to the compressor 2B and thence by way of a duct43 to a condenser 44 and thence'by Way of a duct 45 to the tank 25. From the tank 25 the fluid flows by way 0f a duct 46 to the cooling units in the chamber 2|. On the engine shaft is provided a fan "located opposite the condenser 44 to cool the lfluid passing through the latter.

Ventilation of the chamber I4 may be effected by way of an air inlet blower 48 operatively connected to a fresh air inlet duct 48 connected to and extending up through the roof 8, as shown in Fig. 1. Also connected tp and extending up through the roof 9 is provided an air exhaust duct 5D opposite which is located an exhaust fan 5| driven by a motor 52 suitably supported in the chamber |4.

Within the chamber 2| is provided one or more cooling units 53 of which one, two or more of these units may be disposed in a medial plane of the chamber 2| and others of these disposed at the sides as near to, but spaced from the side walls 5 and 6 and the end wall 8, as shown by way of example in Figs. 1 and 2. (See also Fig. 3.) Each ofl these units stands upright and is of a more or less flat form and comprises a tank or holder 54 supported on seats or brackets 55 suitably secured to the door 4 so that the lower end of the tank is spaced from the oor to afford free movement or circulation of air beneath the unit 53. At the upper end of the tank 541s provided one or more capped inlets 56 by way of which liquid may be poured into the tank 54, and at the lower end of the tank 54 is provided a suitable drain valve 51;

Within the tank 54 and submerged in the liquid in the tank 54 is a coil 58 which is connected at its inlet end by way of a control valve 58 which is in the ductv46, and connected at its outlet end to theduct 42 or to the inlet of a coil 58 of a succeeding unit 53 when the units are connected in series. When the units 53 are arranged in paralle] the outlets of the coils 58 are connected to the return duct 42.

Around the units 53 and in spaced relation thereto may be provided suitable screens or grids 60 to act as guards or fenders to protect the units from injury from' the stored goods .and also to protect the worker when handling the goods. To the top of the unit 53 and to the roof 8 are preferably connected stay or brace means 6| which prevent lateral swaying of the units as the vehicle travels. Beneath each unit is provided an air circulation fan 62 operated by an electric motor 63 supported on stands 64 seating on and preferably secured to the oor 4. In the roof 8 are provided one or more Ventilating doors 65 each having an arm 86 pivotally connected to a linkv61 carried by a screw 68 in turn having screw engagement with a gear 68 operatively meshed with worm 10 driven by a motor 1| xed to a bracket 12 fastened to the roof 8. This motor is suitably electrically connected to a temperature control means, as a thermostat or the like (not shown) for automatically opening and closing the doors 65. Beneath each door 65 is provided a motor driven air-fan 13 for eecting ow of air through the port oi' the door 85. This fan is suitably supported by way of a supporting bracket 14 nxed to the roof 8 or to the end wall 8,

as shown in Fig. 1.

1n contact with the return duct 42 is a. temperature responsive bulb 15 having a fluid tube 16 connected to the control valve 58 (see Fig. 1) sov that as the temperature of the fluid in the return duct 42 rises the iiuid in the bulb 15 and tube 16 expands to cause the valve 58 to open to afford increased ilow of the refrigerant fluid to the coil or coils 58 tothe end of maintaining a constant temperature of the air in the cham'- ber 2|. This may be a master valve 58 to control all the units 53 in the chamber 2|,ibut there may be one of these valves in each inlet duct part to each unit 53 and there may be a bulb 15 and tube 16 connected to each outlet duct part from each unit 53, so that at each locus of each unit the ltemperature of the air of such locus may be maintained constant and even with the air about the other units.

When the outside temperature falls below that to be maintained in the' chamber 2 I, as when the vehicle is in or traveling in cold territory or at high altitudes as in mountainous sections, it becomes desirable to compensate for the dierential of temperatures within and without the chamber 2|. Compensation is eiected by use of heating means in the chamber 2|. This means may be in the form of a radiator 11 having bypass inlet and

outlet connections

18 and 19 with the exhaust duct part 32, and at the juncture of the inlet 18 and the duct 32 is provided a damper or buttery-type of valve controlled by a thermal or like device 8| which operates the valve 80 to shunt the hot gases in the coil or radiator 11 so as to supply heat in the chamber 2|`. One or more of these radiators 11 may be suitably located in the chamber 2| and connected to the exhaust duct 32. The fan 62 will aid in circulating the air so that the balancing of the temperature of the air in the chamber 2| will be quickly eiected.

Coordinately, a thermostat 82 is connected in a circuit with the solenoid 4| and a generator 83.

operated by the engine 22 by way of a suitable drive 84, such as a belt and pulleys, or a chain and sprockets, so that when the temperature in the chamber 2| falls below that desired to effect proper refrigeration in the chamber 2| the thermostat 82 will close the circuit to the solenoid 4| and cause the valves 34 and 35 to shift to cut of! the duct 28 and to open the duct 30--3l-32 to the passage of the hot exhaust gases from the engine. When the temperature of the air in the chamber 2| has been raised suilicie'ntly to that desired in the chamber 2|, the thermal elements 8| and 82 operate conversely to shift the

valves

80, 34 and 35 so a-s to cut oi flow of hot gases to the duct 30-3I-32 and to the radiator 11.

The

ducts

42 and 46 are preferably insulated and are covered with suitable insulating material 85 (see Fig. '7).

Referring to Fig. 4, the structure shown there is similar to that shown in Fig-s. 1, 2 and 3, and for parts common to them the same reference characters are used. Inthis embodiment is provided a. deep freezing chamber 86 having a wall or housing portion 81 between the chambers or compartments 2| and 86, the wall 81 having a door 81' for aiording communication between said chambers. In this chamber 86 are provided any number of cooling units 88 which are the same as the cooling units 53 in the chamber 2|. The coils in these units 88 are connected by a uid duct 88 leading from the duct 46 and to the units 88 by way of control valves 90 which are the same as the valves 58 and which operate in a similar manner except being set for a lower temperature con-` trol, and a bulb control similar to 15-16 shown in Fig. 1 is connected to each of these valves 88 and to the return duct 8| running back to the return duct 42.

When the desired temperature in the compartment or compartments is attained and for the purpose of preventing the temperature going lower thethermostat in the respective compartment is connected to the control valve for the fuel to the engine and acts to slow down the engine so as to slow down the ow of fluid to the cooling unit or units or may even operate the ,engine idly so as to reduce the circulation of th fluid to a minimum. Since operation is usually by way of a gas motor it is desired that it be not stopped entirely because it would be then diilicult to start it up again and therefore it is desirable that the engine be permitted to run idly or at a low capacity until the temperature rises again to the point when the thermostat will act to cause the engine to operate at greater capacity. This thermostat 93 (see Fig. 1)` may be connected by way of electrical line 94 running to a solenoid 95 connected to the fuel control valve or throttle 96 of the engine. The connections to the thermostats 82 and 93, and to the temperature responsive bulbs 15, and to the control 8i may all be inclosed in suitable heat insulating ducts, conduits, pipes or the like as desired.

Access from the outside to the chamber 86 may also be had by way of a door 92 provided in the side wall 5.

While I have herein described and upon the drawings shown an illustrative embodiment of the invention it is to be understood that the invention is not limited thereto but comprehends other constructions, details, arrangements of parts, features and the like without departing from the spirit of the invention.

Having thus disclosed the invention, I claim:

1. A transportable type of refrigerating structure comprising a housing of unitary construction and provided with a plurality of chambers, a refrigerating plant in one of said chambers and having a refrigerant fluid circulation duct, an internal combustion engine drivingv said refrigerating plant and having an exhaust duct connected thereto, a refrigerating unit located in another of said chambers, said refrigerant fluid circulation duct having a feed section extending into said latter chamber and connected to the inlet side of said refrigerating unit and having also a return section in said latter chamber and connected to the outlet side of said refrigerating unit, a lcontrol valve in said feed section for controlling the flow of said refrigerant fluid to said refrigerating unit, a temperature responsive bulb connected to said return section and having a tube connected-to said .control valve for controlling the action of said valve in accordance with the temperature of the fluid passingv through said return section, a heating means in said latter chamber associated with said exhaust duct to receive exhaust gases from the engine, and control means associated With said exhaust duct to ling the action of said-valve in accordance with the temperature of the fluid passing through said 'circulating duct having a coil submerged in the liquid in said container to cool said liquid, a heating means in said latter chamber associated with said exhaust duct to receive exhaust gases from the engine, and control means associated with said exhaust duct to control the flow of exhaust gases through the heating means in response to the temperature in said latter chamber.

3. A transportable type of refrigerating structure comprising a housing of unitary construction and provided with a'plurality of chambers, a refrigerating plant in one of said chambers and having a refrigerant fluid circulation duct, an internal combustion engine driving said refrigerating plant and having an exhaust duct connected thereto, a refrigerating 'unit located in another of said chambers, said refrigerant :duid circulation duct having a feed section extending into said latter chamber and connected to the inlet side of said refrigerating unit and having also a return section in said latter chamber and connected to the outlet side of said refrigerating unit, a control valve in said feed section for controlling the flow of said refrigerant fluid to said refrigerating unit, a temperature responsive bulb connected to said return section and having a tube connected to said control valve for controlling the action of said'valve in accordance with the temperature of the fluid passing through said return section, said refrigerating unit comprising an upright container for holding a liquid to be cooled and to cool the walls of the container, said circulating duct having a coil submerged in the liquid in said container to cool said liquid, supports in said latter chamber for supporting said refrigerating -unit spacedly above the bottom of said latter chamber to provide for circulation of air below said unit, a heating means in said latter chamber associated with said exhaust duct to receive exhaust gases from the engine, and control means associated with said exhaust duct to control the ow of exhaust gases through the heating means in response to the temperature in said latter chamber. I

4. A transportable type of refrigerating structure comprising a housing of unitary construccontrol theflow of exhaust gases through the heating means in response to the temperature in said latter chamber.

2. A transportable type of refrigeratingstructure comprising a housing of unitary construction and provided with a plurality of chambers, a refrigerating plant in one of said chambers and having a refrigerant fluid circulation duct, an internal combustion engine driving said refrigerating plant and having an exhaust'duct connected thereto, a refrigerating unit located in another of said chambers, said refrigerant fluid circulation duct having a feed section extending into said latter chamberand connected to the inlet 'side of said refrigerating unit and having also a return section in said latter chamber and connected to the outlet side of said refrigerating unit, a control valve in said feed 'section for controlling the fiow of said refrigerant uid to said refrigerating unit, a temperature responsive bulb connected to said return section and having a tube connected to said control valve for controltion and provided with a plurality of chambers,

a refrigerating plant in one of said chambers and having a refrigerant uid circulation duct, an internal combustion engine driving said refrigerating plant and having an exhaust duct connected thereto, a refrigeratingunit located in another of said chambers, said refrigerant fluid circulation duct having a feed section extending into said latter chamber and connected to the inlet side of saidrefrigerating unit and having also a return section in said latter chamber and connected to the outlet side of said refrigerating unit, a control valve in said feed section for controlling the ilow of said refrigerant fluid to said refrigerating unit, a temperature responsive bulb connected to -said return section and having a tube connected to said control valve for controlling the action of said valve in accordance with the temperature of the uid passing through said return section, said refrigerating unit comprising an upright container for holding a liquid to be cooled and to cool the walls of the container, said circulatingduct having a coil submerged in the 'liquid in said container to cool said liquid, supports in said latter chamber for supporting said refrigerating unit spacedly above the bottom of said latter chamber to provide for circulation of air below said unit, and a fan in said space below said unit to edect circulation of air around the lower portion Vof the unit, a heating means in said latter chamber associated with said exhaust duct to receive exhaust gases from the engine, and control means associated with said exhaust duct to control the flow of exhaust gases through the heating means in response to the temperature in said latter chamber.

5. A transportable type f refrigerating structure comprising a housing of unitary construction and provided with a plurality of chambers, a refrigerating plant in one of said chambers and having a refrigerant uid circulation duct, an internal combustion engine driving said refrigerating plant and having an exhaust duct connected thereto, a refrigerating unit located in another of said .chambers, said refrigerant fluid circulation duct having a feed section extending into said latter chamber and connected to the inlet side of said refrigerating unit and having also a return section in said latter chamber and connected to the outlet side of said refrigerating unit, a control valve in said feed section for controlling the flow of said refrigerant fluid to said refrigerating unit, a temperature responsive bulb connected to said return section and having a tube connected to said control Valve for controlling the action of said valve in accordance with the temperature of the uid passing through said return section, said refrigerating unit comprising an upright container for holding a liquid to be cooled and to cool the walls of the container, said circulating duct having a coil submerged in the liquid in said container to cool said liquid, supports in said latter chamber for supporting said refrigerating unit in spaced relation to the side walls and to the upper and lower walls of the latter chamber to provide for circulation of air in said latter chamber around said unit, a heat-l ing means in said latter chamber associated with said exhaust duct to receive exhaust gases from the engine, and control means associated with saidexhaust duct to control the now of exhaust gases through the heating means in response to the temperature in said latter chamber.

6. A transportable type of refrigerating structure comprising avhousing of unitary construction and provided with a plurality of chambers, a refrigerating plant in one of said chambers and having a refrigerant fluid circulation duct, an internal combustion engine driving said refrigerating plant and having an exhaust duct connected thereto, a refrigerating unit located in another of said chambers, said refrigerant uid circulation duct having a feed section extending into said latter chamber and connected to the inlet side of said refrigerating unit and having also a return section in said latter chamber and connected to the outlet side of said refrigerating unit, a control valve in said feed section for controlling the flow of said refrigerant fluid to said refrigerating unit, a temperature responsive bulb connected to said return section and having a tube connected to said control valve for controlling the action of said'valve in accordance with the temperature of the fluid passing through said return section, said refrigerating unit comprising an upright container for holding a liquid to be cooled and to cool the walls of the container. said circulating duct having a coil submerged in the liquid in said container to cool said liquid,

supports in said latter chamber for supporting said refrigerating unit in spaced relation to the side walls and to the upper and lower walls of the latter chamber to provide for circulation of air in said latter chamber around said unit, and a fan in the space below said unit to eiect circulation of air around said unit, a heating means in said latter chamber associated with said exhaust duct to receive exhaust gases from the engine, and control means associated with said exhaust duct to control the -ilow of exhaust gases through the heating means in response to the temperature in said latter chamber.

7. A transportable type of refrigerating structure comprising a housing of unitary construction and provided with a plurality of chambers, a refrigerating plant in one of said chambers and having a refrigerant iuid of circulation duct, an internal combustion engine driving said refrigerating plant and having an exhaust duct connected thereto, a refrigerating unit located in another of said chambers, said refrigerant iiuid circulation duct having a feed section extending into said latter chamber and connected tc the inlet side of said refrigerating unit and having also a return section in said latter chamber and connected to the outlet side of said refrigerating unit, a control valve in said feed section for controlling the flow of said refrigerant fluid to said refrigerating unit, a temperature responsive bulb connected to said return section and having a tube connected to said control valve for controlling the action of said valve in accordance with the temperature of the fluid passing through said return section, said refrigerating unit compri-sing an upright container for holding a liquid to be cooled and to cool the walls of the container, said circulating duct having a coil submerged in the liquid in said container to cool said liquid, supports in said latter chamber for supporting said refrigerating unit in spaced relation to the side walls and to the upper and lower walls of the latter chamber to provide for circulation of air in said latter chamber around said unit, and brace means connected to the upper end of said unit and to the upper wall of said latter chamber, a heating means in said latter chamber associated with said exhaust duct to receive exhaust gases from the engine, and control means associated with said exhaust duct to control the flow of exhaust gases through the heating means in response to the temperature in said latter chamber.

v8. A transportable type of refrigerating structure comprising a housing of unitary construction and provided with a. plurality of chambers, a refrigerating plant in one of said chambers and having a refrigerant fluid circulation duct, an internal combustion engine driving said refrigerating plant and having an exhaust duct connected thereto, a refrigerating unit located in another of said chambers, said refrigerant fluid circulation duct having a feed section extending into said latter chamber and connected to the inlet side of said refrigerating unit and having also a return section in said latter chamber and connected to the outlet side of said refrigerating unit, a control valve in said feed section for controlling the ow of said refrigerant fluid to said refrigerating unit, a temperature responsive bulb connected to said return section and having a. tube connected to said control valve for controlling the action of said valvein accordance with the temperature of the iluid passing through said return section, said refrigerating unit comprising an upright container for holding a liquid to be cooled and to cool `the walls of the container, said circulating duct having a coil submerged in the liquid in said container to cool said liquid, supports in said latter chamber for supporting said refrigerating unit in spaced relation to the side walls and tothe upper and lower walls of the latter chamber to provide for circulation of air in said latter chamber around said unit, and a drain means in the lower wall of said latter chamber and below said unit, a heating means in said latter chamber associated with said exhaust duct to receive exhaust gases from the engine, and control means associated with said exhaust duct to control the flow of exhaust gases through the heating means in response to the temperature in said latter chamber.

-9. A'transportable type of refrigerating structure comprising a housing of unitary construction and provided with a plurality of chambers, a refrigerating plant in one of said chambers and having a refrigerant fluid circulation duct, an internal combustion engine driving said refrigerating plant and having an exhaust duct con nected thereto, a refrigerating unit located in another of said chambers, said refrigerant fluid circulation duct having a feed section extending into said latter chamber and connected to the inlet side of said refrigerating unit and having also a return section in said latter chamber and connected tothe outlet side of said refrigerating unit,a control valve in said feed section for controlling the flow of said refrigerant fluid to said refrigerating unit, a temperature responsive bulb connected to said return section and having a tube connected to said control valve for controlling the action of said valve in accordance with the temperature of the fluid passing through said return section, said refrigerating unit comprising an upright vcontainer for holding a liquid to be cooled and to cool the walls of the container, said circulating duct having a coil submerged in the liquid in said container to cool said liquid, supports in said latter chamber for supportingsaid refrigerating unit in spaced relation'to the side walls and to the upper and lower walls of the latter chamber to provide for circulation of air in said latter chamber around said unit, the upper end of said container having a normally closed liquid inlet filling opening, a heating means in said latter chamber associated with said exhaust duct to receive exhaust gases from the engine, and control means associated with said exhaust duct to control the ow of exhaust gases through the heating means in response to the temperature in said latter chamber.

10. A transportable type of refrigerating structure comprising a housing of unitary construction and provided withv a plurality of chambers, a refrigerating plant in one of said chambers and having, a refrigerant uid circulation duct, an internal combustion engine driving said refrigerating plant and having an exhaust duct connected thereto, a refrigerating unit located in another of said chambers, said refrigerant fluid circulationl duct having a feed section extending into said latter chamber and connected to the inlet side of said refrigerating unit and having also a return section in said latter chamber and connected to the outlet side of said refrigerating unit, a control valve in said feed section for conv Y trolling the now of said refrigerator num to said refrigerating unit, a temperature responsive bulb connected to said return section and having a tube connected to said control valve for controlsaid refrigerating unit comprising an upright ling the action of said valve in accordance with the temperature of the uuid passing through said return section, said refrigerating unit comprising an upright container for holding a liquid to be cooled and to cool the walls of the container, said circulating duct having a coil submerged in the liquid in said container to cool said liquid, supports in said latter chamber for supporting said refrigerating unit in spaced relation to the side walls and to the upper and lower walls of the latter chamber tovprovide for circulation of air in said latter chamber around said unitl the upper end of said container having a normally closed liquid inlet filling opening, and the'lower end of said container having a drain valve, a heating means in said latter chamber associated with said exhaust duct to receive exhaust gases from the engine, and control means associated with said exhaust duct to control the flow of exhaust gases through the heating means in response to the temperature in lsaid latter chamber.

11. A transportable type of refrigerating struc- 'ture comprising a housing of unitary construction and provided with a plurality of chambers, a refrigerating plant'in one of said chambers and having a refrigerant uid circulation duct connected to said plant, a refrigerating unit located in another of said chambers, said fluid circulation duct having a feed section extending into said latter chamber and connected to the inlet side of said refrigerating unit and having also a return section in said latter chamber and connected to the outlet side of said refrigerating unit, a control valve in said feed section for controlling the flow of said fluid to said refrigerating unit, a temperature responsive bulb connected to said return section and having a tube connected to `said control valve for controlling the action of said valve in accordance with the temperature of the fluid passing through said return section, said refrigerating unit comprising an upright container for holding a liquid to be cooled and to cool the walls of the container, said circulating duct having a coil submerged in the liquid in said container to cool said liquid, said refrigerating plant comprislng a gas engine having a main exhaust duct extending to the exterior of said housing, an auxiliary exhaust duct connected to said main exhaust duct and extending into and through said latter chamber, a heat radiator in said latter chamber and connected to said auxiliary exhaust duct, a valve in said auxiliary exhaust duct, and athermostat in said latter chamber and connected to said latter valve for controlling the flow of exhaust gases to said radiator. i 12. A transportable type of refrigerating structure comprising a housing of unitary construction and provided with a plurality of chambers, a refrigerating plant in one of said chambers and having a refrigerant fluid circulation duct connected to said plant, a refrigerating unit located in another of said chambers, said fluid circulation duct having a feed section extending into said latter chamber and connected to the inlet side of said refrigerating unit and having also a return section in said latter chamber and connected to the outlet side of said refrigerating unit,

a control valve in said feed section forcontrolling the flow of-said fluid to said refrigerating unit, a temperature responsive bulb connected to said return section and having a tube connected to said control valve for controlling the action of said valve in accordance with the temperature of the fluid passing through said return'section,

container for holding a liquid to be cooled and to. cool the walls of the container, said circulating duct having a coil submerged in the liquid in said container to cool said liquid, said refrigerating plant comprising a gas engine having a. main exhaust duct extending to the exterior of said housing, an auxiliary exhaust duct connected to said main exhaust duct and extending into and through said latter chamber, a heat radiator in said latter chamber and connected to said'auxiliary exhaust duct, a valve in said auxiliary exhaust duct, and a thermostat in said latter chamber and connected tosaid latter valve for controlling the now of exhaust gases to said radiator, the lower wall of said latter chamber being provided with a channel, and said auxiliary exhaust duct extending along said channel.

13. A transportable type of refrigerating structure comprising a hiusing of unitary construction and provided with a plurality of chambers, a refrigerating plant in one of said chambers and having a refrigerantuid circulation duct connected to said plant, a refrigerating unit located in another of said chambers, said uid circulation duct having a, feed section extending into said latter chamber and connected to the inlet side of said refrigerating unit and having also a return section in said latter chamber and connected'to the outlet side of said refrigerating unit, a control valve in said feed section for controlling the ow of said uid to said refrigerating unit, a temperature responsive bulb connected to said return section and having a tube connected to said control valve for controlling the action of said valve in accordance with the temperature `of the fluid passing through said return section,

said refrigerating unit comprising an upright container for holding a liquid to be cooled and to cool the walls of the container, said circulating duct having a coil submerged in the liquid in said container to cool said liquid, said refrigerating plant comprising a gas engine having a main exhaustduct extending to the exterior of said housing, an auxiliary exhaust duct connected to said main exhaust duct and extending into and through said latter chamber, a heat radiator in said latter chamber and connected to said auxiliary exhaust duct,'a valve means connected to said exhaust duct for switching the exhaust gases to one or the other of said exhaust ducts, a thermostat in said latter chamber, an electrical means connected to said valve means and to said thermostat to operate said valve means in accordance with the temperature of the air in said latter chamber.

14. A transportable type of refrigeratingstructure comprising a housing of unitary construction and provided with a plurality of chambers, a refrigerating plant in one of said chambers and having a refrigerant fluid circulation duct connected to said plant, a refrigerating unit located in another of said chambers, said fluid circulation duct having a feed section extending into said latter chamber and connected to the inlet side of said refrigerating unit and `paving also a return section in said latter chamber and connected to the outlet side of said refrigerating unit, a control valve in said feed section for controlling the flow of said fluid to said refrigerating unit, a temperature responsive bulb yconnected to said return section and having a tube connected to said control valve for controlling the action of said valve in accordance with the temperature of the uid passing through said return section, said refrigerating unit comprising an upright container for holding a liquid to be cooled 'and to cool the walls of the container, said circulating duct having a coil submerged in the liquid in said container to cool said liquid, said refrigerating plant comprising a gas engine having a main exhaust duct extending to the exterior of said housing, an auxiliary exhaust duct connected to said main exhaust duct and extending into and through said latter chamber, a heat radiator in said latter chamber and connected to said auxiliary exhaust duct, a valve means connected to said exhaust duct for switching the exhaust gases to one or the other of said exhaust ducts, a thermostat in said latter chamber, an electrical means connected to said valve means and to said thermostat to operate said valve means in accordance with the temperature of the air in said latter chamber. said radiator having a duct connected in shunt with said auxiliary exhaust duct, a valve in said shunt connection, and a thermostat in said latter chamber and connected to said latter valve for controlling the shunting of exhaust gases between said auxiliary exhaust duct and said radiator.

15. A transportable type of refrigerating structure comprising a housing of unitary construction and provided with a plurality of chambers, a refrigerating plant in one of said chambers and having a refrigerant iiuid circulation duct connected to said plant, a refrigerating unit located in another of said chambers. said fluid circulation duct having a feed section extending into said latter chamber and connected to the inlet side of said refrigerating unit and having also a return section in said latter chamber and connected to the outlet side of said refrigerating unit, a control valve in said feed section for controlling the flow of said iiuid to said refrigerating unit, a temperature responsive bulb connected to said return section and having a tube connected to said control valve for controlling the action of said valve in accordance with the teinperature of the uid passing through said return section, said refrigerating unit comprising an upright container for holding a liquid to be cooled and to cool the walls of the container, said circulating duct having a coil submerged in the liquid in said container to cool said liquid, said refrigerating plant comprising a gas engine having a main exhaust duct extending to the exterior of said housing, an auxiliary exhaust duct connected to said mainexhaust duct and extending into and through said latter chamber, a heat radiator in said latter chamber and connected to said auxiliary exhaust duct, a valve means connected to said exhaust duct for switching the exhaust gases to one or the other of said exhaust ducts, a thermostat in said latter chamber, an electrical means connected to said valve means and to said thermostat to operate said valve means in accordance with the temperature of the air in said latter chamber, said radiator having a duct connected in shunt with said auxiliary exhaust duct, a valve in said shunt connection, and a thermostat in said latter chamber and connected to said latter valve for controlling the shunting of exhaust gases between said auxiliary exhaust duct and said radiator, said gas engine having a throttle means for regulating the operation of said engine, an electrical means connected to said throttle means, and a thermostat connected to said second electrical means to regulate the operation of said engine in accordance with the temperature of the air in said latter chamber.

ture comprising a housing of unitary construction vand provided with a refrigerating plant chamber containing a rei'rlgerating plant, a normal freezing chamber, and a deep freezing chamber, refrigerant fluid circulation ducts connected to said plant and to said normal freezing chamber and to said deep freezing chamber, each of said circulating ducts having a feed section extending respectively to said freezing chambers and a return section extending respectively from said freezing chambers, a normal freezing refrigerating unit in said normal freezing chamber and connected to the feed and return sections therein, and a deep freezing refrigerating unit in said deep freezing chamber and connected to the feed and return sections therein, a control valve in each of said feed sections, a temperature responsive bulb connected to each of said return sections and having a tube connected respectively to said control valves, an internal combustion engine driving said refrigerating plant and having an exhaust duct connected thereto. a heating means in said normal freezing chamber associated with said exhaust duct to receive exhaust gases from the engine therethrough, and control means associated with said exhaust duct to control the dow of exhaust gases through the heating means in response to the` temperature 'in said normal freezing chamber.

PIETRO MANISCALCO.

REFERENCES errno.

ie of this patent:

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