Auxiliary refrigeration power means

Claim 2

In an engine powered vehicle having a storage battery and a generator connected to said engine and battery, and a refrigerated compartment and a refrigeration system therefor including a cooling coil, a compressor connected by a conduit to the outlet of said cooling coil, an alternating current motor operatively connected to said compressor, a condensor connected by conduit to the outlet of said compressor and to the inlet of said cooling coil, and an expansion valve or the like in the conduit to said cooling coil, the improvement therein and therewith, comprising: a. a second compressor mounted on said vehicle, said second compressor connected to said condensor and said cooling coil in parallel wIth said first named compressor, b. a direct electric motor mounted on said vehicle and operatively connected to said second compressor, said direct current motor being electrically connected to said storage battery and said generator in powered relation thereto, and c. control means operatively connected to said system downstream of said second compressor and to said direct current motor to intermittently operate said direct current motor and second compressor relative the refrigeration demand of said system, said second compressor is constructed and adapted to be operable during periods when said alternating current motor is disconnected from a source of alternating current electicity.

Claim 3

The refrigeration means of claim 1, wherein: a. said refrigeration system has a first check valve means connected in said conduit from said outlet of said compressor to pass fluid from said compressor to said condensor, and b. said refrigeration system has a second check valve means connected to the outlet of said second compressor to pass fluid from said second compressor to said condensor.

Claim 4

The refrigeration means of claim 2, wherein: a. said control means has a pressure actuated switch means connected to said conduit between said cooling coil and said second compressor, said pressure actuated switch means is electrically connected to said direct current electric motor and to said battery, b. said control means has a thermostat switch means communicably connected to said cooling coil, said thermostat switch being electrically connected to said alternating current electric motor to intermittently operate same, and c. a cooling fan means is mounted with said vehicle for cooling said direct current electric motor and said second compressor, said cooling fan means having a direct current electric motor and being electrically connected to said pressure actuated switch means for simultaneous operation with said direct current electric motor.

Claim 5

The refrigeration means of claim 1 wherein: a. said second compressor has a second condensor connected to the outlet thereof, said second condensor having the outlet thereof connected by conduit to said expansion valve or the like, b. said refrigeration system has a first check valve communicably connected in said conduit between said first named condensor and said expansion valve or the like to pass fluid from said first named condensor to said expansion valve or the like, and c. said refrigeration system has a second check valve communicably connected in said conduit between said second condensor and said expansion valve or the like to allow refrigerant to pass from said second condensor to said expansion valve or the like.

Claim 6

The refrigeration means of claim 4, wherein: a. said control means has a pressure actuated switch means communicably connected to said conduit between said cooling coil and said second compressor, said pressure actuated switch means is electrically connected to said direct current electric motor and to said storage battery, b. said control means has a thermostat switch means communicably connected to said cooling coil, said thermostat switch being electrically connected to said alternating current electric motor to intermittently operate same, and c. said refrigeration system has a cooling fan means for cooling said direct current electric motor and said first named compressor, said cooling fan means having a direct current electric motor and being connected to said pressure actuated switch means for operation simultaneously with said direct current electric motor.

Claim 7

In an engine powered vehicle having a storage battery and a generator connected to said engine and battery, and a refrigerated compartment and a refrigeration means therefor including a cooling coil, a compressor connected by a conduit to the outlet of said cooling coil, a condensor connected by conduit to the outlet of said compressor and to the inlet of said cooling coiL, and an expansion valve or the like in the conduit to said cooling coil, the improvement therein and therewith comprising: a. a direct current electric motor mounted on said vehicle and operatively connected to said compressor, said motor being electrically connected to said storage battery and said generator in powered relation thereto, and said motor being the only powering means for said refrigeration system, b. rectifying means mounted on said vehicle and connected to said motor, such being constructed and adapted to convert alternating current to direct current, said rectifying means having means connectable to a source of alternating current electricity when said vehicle is normally not in use, c. refrigeration demand control means operably connected to said system downstream of said compressor and to said motor to intermittently operate said motor relative to the refrigeration demand of said system, and d. electrical control means operatively connected to said rectifying means and having means to connect said rectifying means to said motor when said rectifying means is electrically connected to said source of alternating current electricity, and having means to automatically change from powering said motor from said rectifier to powering said motor from said battery upon termination or interruption of said alternating current electricity, and having means to automatically change from powering said motor from said battery to powering said motor via said rectifying means when said rectifying means is connected to said source of alternating current electricity.

Claim 8

In an engine powered vehicle having a storage battery and a generator connected to said engine and battery, and a refrigerated compartment and a refrigeration means therefor including a cooling coil, a compressor connected by a conduit to the outlet of said cooling coil, a condensor connected by conduit to the outlet of said compressor and to the inlet of said cooling coiL, and an expansion valve or the like in the conduit to said cooling coil, the improvement therein and therewith comprising: a. a direct current electric motor mounted on said vehicle and operatively connected to said compressor, said motor being electrically connected to said storage battery and said generator in powered relation thereto, and said motor being the only powering means for said refrigeration system, b. rectifying means mounted on said vehicle and connected to said motor, such being constructed and adapted to convert alternating current to direct current, said rectifying means having means connectable to a source of alternating current electricity when said vehicle is normally not in use, c. refrigeration demand control means operably connected to said system downstream of said compressor and to said motor to intermittently operate said motor relative to the refrigeration demand of said system, and d. electrical control means operatively connected to said rectifying means and having means to connect said rectifying means to said motor when said rectifying means is electrically connected to said source of alternating current electricity, and having means to automatically change from powering said motor from said rectifier to powering said motor from said battery upon termination or interruption of said alternating current electricity, and having means to automatically change from powering said motor from said battery to powering said motor via said rectifying means when said rectifying means is connected to said source of alternating current electricity.

Claim 9

The refrigeration means of claim 6 wherein said refrigeration demand control means has a thermostat switch means thermally communicably connected to said cooling coil and electrically connected to said motor.

Claim 10

The refrigeration means of claim 7, wherein: a. said electrical control means has a solenoid switch means with the solenoid coil thereof connected to the input of said rectifying means, and an input contact thereof connected to said battery, another input contact thereof connected to the output of said rectifying means and having an output electrically connected to said motor, and b. said electrical control means has a second solenoid switch means having the solenoid coil thereof connected to said first solenoid switch means output and said thermostat switch means having an input contact thereof connected to said direct current electric motor, and having an output contact thereof connected to said first solenoid switch means output.

Claim 11

The refrigeration means of claim 6, wherein, said rectifying means is removably connectable with said motor, and a source of alternating current power.