초록 ▼

A refrigerating machine having tube-cooled evaporator & air-cooled evaporator includes a refrigerating device (1) and a defroster (4). The refrigerating device (1) includes a compressor (11), a condenser (12), a reservoir (13), a heat exchanger (14), a first refrigerating electromagnetic valve (15a)

A refrigerating machine having tube-cooled evaporator & air-cooled evaporator includes a refrigerating device (1) and a defroster (4). The refrigerating device (1) includes a compressor (11), a condenser (12), a reservoir (13), a heat exchanger (14), a first refrigerating electromagnetic valve (15a), a first expansion valve (16a), a tube-cooled evaporator (2), a second refrigerating electromagnetic valve (15b), a second expansion valve (16b), an air-cooled evaporator (3), and a plurality of pipes (10a, 10b, 10c, 10d, 10g). The defroster (4) includes a micro switch (41), a door-opening relay, a high/low pressure switch (43), a compressor electromagnetic switch, a delay relay (45), a set timer (46), a defrosting timer (47), a defrosting conversion contactor, and a defrosting resetting temperature switch (40). The air-cooled evaporator 3 can absorb hot air entering a refrigerating chamber (5) and absorbing moisture in the hot air to increase the freezing effect and refrigerating efficiency in the refrigerating chamber (5).

대표청구항 ▼

1. A refrigerating machine having tube-cooled evaporator & air-cooled evaporator comprising: refrigerating device including: a compressor having an output end and an input end;a condenser including an input end, an output end and a fan;a first pipe in communication with and located between the outpu

1. A refrigerating machine having tube-cooled evaporator & air-cooled evaporator comprising: refrigerating device including: a compressor having an output end and an input end;a condenser including an input end, an output end and a fan;a first pipe in communication with and located between the output end of the compressor and the input end of the condenser;a reservoir including an inlet and an outlet;a heat exchanger including an input pipe and an output pipe, with the output pipe of the heat exchanger being in communication with the input end of the compressor;a second pipe;a first refrigerating electromagnetic valve mounted on the second pipe;a first expansion valve mounted on the second pipe and located downstream of the first refrigerating electromagnetic valve;a tube-cooled evaporator in communication with a downstream end of the first expansion valve;a fifth pipe in communication with a downstream end of the tube-cooled evaporator, with the input pipe of the heat exchanger being in communication with the fifth pipe;a third pipe in communication with the second pipe and located upstream of the first refrigerating electromagnetic valve;a second refrigerating electromagnetic valve mounted on the third pipe;a second expansion valve mounted on the third pipe and located downstream of the second refrigerating electromagnetic valve;an eighth pipe in communication with a downstream end of the second expansion valve;an air-cooled evaporator in communication with a downstream end of the eighth pipe;a fourth pipe in communication with a downstream end of the air-cooled evaporator and the fifth pipe; andan in-chamber temperature switch having a first contact and a second contact,wherein the inlet of the reservoir is in communication with the output end of the condenser, the outlet of the reservoir is in communication with the second pipe; anda defroster including: a micro switch having a first contact and a second contact;a door-opening relay including a coil, a first contact, a second contact, a third contact, and a fourth contact;a high/low pressure switch;a compressor electromagnetic switch including an overload protector and a coil electrically connected to the overload protector;a delay relay having a contact;a set timer having a first contact and a second contact;a defrosting timer having a first contact and a second contact;a defrosting conversion contactor including a coil, a first contact, a second contact, a third contact, and a fourth contact;a seventh pipe;a defrosting electromagnetic valve mounted on the seventh pipe;a defrosting resetting temperature switch having a fixed contact, a first contact, and a second contact,wherein the micro switch is mounted in an entrance of a refrigerating chamber, the first contact of the micro switch is electrically connected to the coil of the door-opening relay, the first contact of the door-opening relay, the contact of the delay relay, and the second contact of the door-opening relay,wherein the second contact of the micro switch is electrically connected to the delay relay and the contact of the delay relay,wherein the contact of the delay relay is electrically connected to the first contact of the door-opening relay,wherein the second contact of the door-opening relay is electrically connected to the second refrigerating electromagnetic valve, the fan of the condenser, the third contact of the door-opening relay, the first contact of the set timer, the defrosting timer, the defrosting electromagnetic valve, and the coil of the defrosting conversion contactor,wherein the third contact of the door-opening relay is electrically connected to the first contact of the set timer, the second contact of the set timer, a plurality of fans of the air-cooled evaporator, the high/low pressure switch, and the in-chamber temperature switch,wherein the second contact of the set timer is electrically connected to the fourth contact of the door-opening relay, and the fourth contact of the door-opening relay is electrically connected to the first refrigerating electromagnetic valve,wherein the high/low pressure switch is electrically connected to the in-chamber temperature switch, the third contact of the door-opening relay, the coil of the compressor electromagnetic switch, and the overload protector,wherein the first contact of the defrosting timer is electrically connected to the first contact of the defrosting resetting temperature switch, the first contact of the defrosting conversion contactor, and the third contact of the defrosting conversion contactor,wherein the second contact of the defrosting timer is electrically connected to the fourth contact of the defrosting conversion contactor,wherein the first contact of the defrosting conversion contactor is electrically connected to the fixed contact of the defrosting resetting temperature switch, the first contact of the defrosting resetting temperature switch, and the third contact of the defrosting resetting temperature switch,wherein the second contact of the defrosting conversion contactor is electrically connected to the second refrigerating magnetic valve, the fan of the condenser, the plurality of fans of the air-cooled evaporator, and the fourth contact of the defrosting conversion contactor,wherein the third contact of the defrosting conversion contactor is electrically connected to the defrosting magnetic valve,wherein the coil of the defrosting conversion contactor is electrically connected to the fixed contact of the defrosting resetting temperature switch and the first contact of the defrosting conversion contactor,wherein the seventh pipe including a first end located between the compressor and the condenser and a second end in communication with the eighth pipe connected between the second expansion valve and the air-cooled evaporator. 2. The refrigerating machine having tube-cooled evaporator & air-cooled evaporator as claimed in claim 1, further comprising: a manual selection switch mounted between the coil of the compressor electromagnetic switch and the micro switch, the coil of the door-opening relay, the high/low pressure switch, the delay relay, the set timer, the defrosting timer, the defrosting conversion contactor, the defrosting electromagnetic valve, and the in-chamber temperature switch. 3. The refrigerating machine having tube-cooled evaporator & air-cooled evaporator as claimed in claim 2, with the heat exchanger including a closed container having an outer barrel and an inner barrel fixed inside the outer barrel, with the outer barrel including an inlet tube in communication with the outlet end of the reservoir, with the outer barrel further including an outlet tube in communication with the first and second expansion valves, with the inner barrel including the input pipe in communication with the fifth pipe, with the inner barrel further including the output pipe in communication with the input end of the compressor. 4. The refrigerating machine having tube-cooled evaporator & air-cooled evaporator as claimed in claim 3, with the tube-cooled evaporator including a tube, a plurality of radially spaced fins integrally formed on an outer periphery of the tube, and a bracket, with the tube or the plurality of radially spaced fins fixed by the bracket to an inner top face of the refrigerating chamber. 5. The refrigerating machine having tube-cooled evaporator & air-cooled evaporator as claimed in claim 3, with the air-cooled evaporator including a tank fixed to an inner top face of the refrigerating chamber, the plurality of fans fixed to the tank, a row of copper pipes mounted in the tank, and a water pan mounted to a bottom of the tank, with a water draining pipe mounted to the water pan. 6. The refrigerating machine having tube-cooled evaporator & air-cooled evaporator as claimed in claim 4, with the tube-cooled evaporator further including: a sixth pipe in communication with and located between the first refrigerating electromagnetic valve on the second pipe and the first expansion valve;a third expansion valve mounted on a downstream end of the sixth pipe; anda first tube-cooled evaporator in communication with a downstream end of the third expansion valve, with the first tube-cooled evaporator including a tube, a plurality of radially spaced fins integrally formed on an outer periphery of the tube, and a bracket, with the tube or the plurality of radially spaced fins fixed by the bracket to an inner top face of the refrigerating chamber, with the tube of the first tube-cooled evaporator including an end in communication with the downstream end of the third expansion valve, with the tube of the first tube-cooled evaporator including another end in communication with the fifth pipe. 7. The refrigerating machine having tube-cooled evaporator & air-cooled evaporator as claimed in claim 5, with the tube-cooled evaporator further including: a sixth pipe in communication with and located between the first refrigerating electromagnetic valve on the second pipe and the first expansion valve;a third expansion valve mounted on a downstream end of the sixth pipe; anda first tube-cooled evaporator in communication with a downstream end of the third expansion valve, with the first tube-cooled evaporator including a tube, a plurality of radially spaced fins integrally formed on an outer periphery of the tube, and a bracket, with the tube or the plurality of radially spaced fins fixed by the bracket to an inner top face of the refrigerating chamber, with the tube of the first tube-cooled evaporator including an end in communication with the downstream end of the third expansion valve, with the tube of the first tube-cooled evaporator including another end in communication with the fifth pipe.