CN2092722U

CN2092722U - Cooling, heating and temp. preserving box

Info

Publication number: CN2092722U
Application number: CN 91202375
Authority: CN
Inventors: 蒲连金
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-02-12
Filing date: 1991-02-12
Publication date: 1992-01-08

Abstract

The utility model relates to an incubator for refrigerating and heating which is a novel civil electric product. Tightly closed to the inner wall of aluminum alloy, a semi-conductor device is arranged in a plastic outer shell and a heat preservation heat-insulating layer, and the semi-conductor device can make refrigerating or heating according to the different direction of voltage added on both ends thereof. The utility model has the advantages of working with low voltage, power expenditure saving, no use for cryogen, high safety, reasonable structural design, small size, convenient portability. Provided with a temperature freely control circuit, the utility model is new equipment for improving labor conditions for field man and chauffeurs, being used as a portable heat preservation device for tourist, hospitals, etc.

Description

Cooling, heating and temp. preserving box

The utility model relates to a kind of refrigeration, heats, incubator.Belong to the applied technical field that electricity freezes, heats semiconductor devices.

Ozone is uniquely in the atmosphere can absorb the gas that the solar ultraviolet wire spoke is penetrated, and concentrates in a large number that stratospheric ozone is empty on earth to form a protective layer, does not allow a large amount of solar ultraviolet wire spokes be mapped to and reaches ground, in order to avoid human body and tissue of biological cells are destroyed; And only allow a small amount of ultraviolet ray shine ground.This a small amount of ultraviolet ray is not only harmless to biology, can also sterilizing disease-preventing, and favourable to ecological environment.According to the study, the ozone over nearly 20 years in the atmosphere is in obvious minimizing, and this mainly is the refrigerant that enters refrigerating plant in the mankind's activity--and dichlorodifluoromethan (fluorine Lyons) causes.

For many years; international environmental protection is often organized and is appealed to countries in the world: for human descendants's happiness; for the ozone layer in the atmosphere of preserving our planet; maintaining ecological balance; must reduce the use of using quite general refrigerant " fluorine Lyons " at present, to reduce " fluorine Lyons " pollution to earth environment.China was just begun to develop semiconductor refrigerating, is heated device by the Chinese Academy of Sciences as far back as 1966, through scientific and technical personnel make great efforts tackling key problem for many years, this device is come out.But, because cost height, refrigeration work consumption were limited at that time, substantially war products or the equipment such as guided missile, die Raketenbasis and submarine that are used for space flight and aviation, after 1988, this device just is applied in industrial refrigeration, cooling or the temperature measuring equipment gradually, as being applied in inflammable, the explosive occasions of industry such as heat-treating atmosphere stove, kiln.In recent years, raising along with the progress of economic technology and people's material, spiritual life level, with semi-conductor electricity refrigeration, heat the cry that device replaces " fluorine Lyons " refrigeration plant and increase day by day, and develop the new product that some civilian air conditioners, refrigerator etc. replace " fluorine Lyons " refrigerants gradually.

The purpose of this utility model provides and a kind ofly do not need compressor, without cold-producing medium, cancellation " fluorine Lyons " environmental pollution and the incubator that adopts the semiconductor devices refrigeration, heat.

The utility model is that the advanced semiconductor device that the utilization peltier effect that utilizes China scientific and technical personnel to succeed in developing freezes, heats is realized goal of the invention.This device can be according to the different different effect that produce refrigeration or heat of the voltage direction that its two ends applied, and this device working stability is reliable, reaches 10 service life ⁵Hour, be a kind of microelectronics novel product that has much development prospect.

The utility model utilizes semiconductor devices to freeze, heat and be incubated, and does not need compressor, and without cold-producing medium, so volume is little, in light weight, easy to carry, and production cost is low.It does not contain " fluorine Lyons ", can not destroy ozone, and atmospheric environment is produced pollute, be again low voltage operating, power consumption is low, and is safe in utilization, convenient.The effect that on structural design, has also taken into full account the reasonable Arrangement of parts and improved the device refrigeration, heat.It can create conditions for industry staff such as the geology of throughout the year working in the open air, oil, the mine welfare of making the life better, deposit blood plasma, vaccine, medicine when also can be used for the health care first aid, more can be the people of out on tours and the convenience that the driver provides diet.

Below in conjunction with accompanying drawing, specifically introduce the utility model.

Fig. 1--the 3rd, general assembly structure chart of the present utility model, wherein Fig. 1 is a front view, and Fig. 2 is a right side view, and Fig. 3 is a vertical view.

Fig. 4 is the main circuit schematic diagram of the utility model control circuit.

Fig. 5 is temperature auto control circuit theory diagrams in the utility model control circuit.

Fig. 1--in 3, the 1st, the cabinet shell of cuboid, the 2nd, be positioned at the case lid of casing 1 top, both make with rigid plastics.The 3rd, with the inner bag (wall) that thin-wall aluminum alloy is made, between shell 1 and inner bag 3, be filled with the insulation layer of making of the polyurethane expanded material 4.The 5th, close the box fastener of case lid and lock.Lateral surface in casing one side offers cavity 6, cavity top is equipped with fan 8 and drive motors 7 thereof, the bottom of cavity be equipped with can according to its two ends the different semiconductor devices 9 that freeze or heat of alive direction, be close in the inboard of device 9 heat conduction (cold) body 12 that directly links to each other by bolt 11 and aluminium alloy inwall 3 is housed, be close in the outside of device 9 its fin 10 is housed.The used refrigeration of the utility model, heat product DT12705 or DT12703 that semiconductor devices is the big the whole nation border Electronics Co., Ltd. of China.As shown in the figure, fan 8, to freeze, heat semiconductor devices 9 and fin 10 all be vertical the placement, helps ventilation and heat.Wherein the flabellum of fan 8 is the right-hand screw shape, and its rotation direction (being shown in the thick line haircut) is to the force ventilated clockwise direction of its downside.The fin made from aluminium alloy extrusions also is vertical placement with device, and the downward drip of the globule that produces in the time of can increasing area of dissipation like this and make device refrigeration prevents to enter and damages electronic circuit in the device.And flow on the fin under the globule, the heat that utilizes fin to disperse again makes globule evaporation, and absorption band is walked heat, improves radiating effect.On the cavity 6 that wall box is offered, protection housing 15 is housed in the outside of fan, motor and fin also.The housing bottom covers fin 10, housing top is used for the shroud fan, motor, its external form is the garden arcuation, be provided with barrier shape breach 15C in the middle of it, and have air draft breach 15B on the right side of its garden arc retaining wall 15A, form the air channel between fan 8 and the retaining wall 15A, when fan clockwise rotates (shown in heavy line), barrier shape breach 15C by housing 15 sucks extraneous cold air, by fan rotate compel, force ventilation downwards, make the most air fin of flowing through discharge (flow direction that fine line is wind among Fig. 2) downwards, and take away the heat that fin is dispersed out, help forming heat exchange.And flow in the air channel that between fan 8 and retaining wall 15A, is formed by the small part hot-air that fan takes up, and discharge from breach 15B, improved the heat extraction effect.Above the right side of cavity 6, be respectively equipped with the change-over switch 14 of automatic temperature control circuit 13 and control cooling and warming.Be provided with a recessed breach 17 in the middle of the top of case lid 2, handle 16 just is contained in the both sides of breach 17.Structural design of the present utility model is simple, reasonable, light, attractive in appearance, and adopts low-voltage (+12 volts) power supply, and is safe and reliable.

Control circuit of the present utility model is dimerous by the main circuit of semiconductor devices shown in Figure 4 and automatic temperature control circuit (as shown in Figure 5) thereof.Wherein be connected to refrigeration (COLD position) at the two ends of DC voltage (+12 volts) in the main circuit, heat (HOT position) double-throw selection gauge tap K; after the output two ends of K switch are then by the normally closed contact J1 of relay J respectively and be connected with refrigeration indicator lamp D1; heat indicator lamp D2; freeze, heat semiconductor devices DT and thermal protection circuit JR and rectifier circuit, the output of rectifier bridge is the wind-receiving fan motor M then.When K switch being swung to COLD position side, voltage is connected R1D1 behind protective tube RD, light emitting diode D1(green) bright, semiconductor devices DT refrigeration, rectifier circuit work simultaneously, fan motor M ventilation heat extraction.And when K switch being swung to HOT position side, voltage is connected R2D2 behind protective tube, light emitting diode D2(redness) bright, semiconductor devices DT heats mutually on the contrary because of voltage direction.Rectification bridge circuit then fan motor rotates ventilation.Make the thermal protection circuit of this device heating, be serially connected with in the parallel branch of refrigeration semiconductor device self-recovering type electrothermal relay that bimetal leaf makes.

The relay drive circuit that the voltage comparator circuit that automatic temperature control circuit then is made of single-pole double-throw switch (SPDT) K1 and operational amplifier IC1 as shown in Figure 5, the single stabilization delay circuit that is made of 555 time base circuit IC2, indicating circuit that light emitting diode D3, D4 constitute and transistor T 1, T2 constitute is formed.IC3 is+12V voltage-stabilized power supply integrated circuit among the figure.Introduce its refrigeration below in conjunction with accompanying drawing and regulate the control operation principle: at first commutator K1 is swung to COLD side (cold) position and potentiometer R3 is placed+12 volts of power supplys of connection behind the centre position, powering up moment makes also instantaneous short circuit and charging of capacitor C 3, thereby make the action of IC2555 time base circuit export high level, light emitting diode D4(redness) lamp is bright, transistor T 1, T2 conducting, relay J adhesive action makes that the normally closed contact J1 on the main circuit disconnects, and main circuit is cut off.Regulator potentiometer R3 clockwise behind delay circuit R6 and C5 time-delay certain hour again, make it turn to refrigeration side (R2 is a thermistor among the figure) to make the current potential V3 of inverting input (3 pin) of IC1 less than the current potential V2 of its in-phase input end (2 pin), this moment, the output of IC1 then was low level, transistor T 1T2 ends, the relay J release movement.The relay contact J1 of main circuit returns to normal and connects main circuit and make semiconductor devices begin refrigeration, passing along with the semiconductor devices refrigeration work time, temperature descends gradually in the casing, and the resistance that is placed in thermistor R2 wherein then descends with temperature and resistance rises big.Make the current potential of in-phase input end (2 pin) of IC1 also descend gradually, when V2 reduces to current potential V3 less than inverting input (3 pin), IC1 is with output low level, make the IC1 output high level that also overturns, transistor T 1, T2 conducting, relay J adhesive action disconnects main circuit once more, and semiconductor devices then quits work.Keep low temperature in the casing.Passing in time, temperature can rise gradually in the casing, this moment, the resistance of thermistor R2 also reduced gradually, made the current potential of in-phase input end V2 of IC1 also raise gradually, when its current potential surpasses the current potential V3 of inverting input V3, IC1 exports high level again, make the IC2 output low level, transistor T 1, T2 end once more, and relay discharges, main circuit is reclosed, allow semiconductor devices work freeze again.As mentioned above, just can realize the automatic temperature-adjusting control course of work of semiconductor devices.In like manner, this device heat principle such as above-mentioned similar, just the commutator of two control circuits is thrown to opposite side (HOT position side), make the voltage direction of main circuit change positive and negative position, and regulate R3 counterclockwise.

The utility model has been tested enforcement, makes model machine, and refrigeration can reach-10 ℃, heats to reach+80 ℃ (the test room temperature is for+20 ℃), and its volume is 12 liters, and power consumption is 40W/ hour, has reached designing requirement.

Claims

1, a kind of refrigeration, heat, incubator, include casing, case lid, handle and control circuit, it is characterized in that:

(1) casing is a cuboid, and case lid is positioned at the top of casing, and its shell is a rigid plastics, and inner bag is a thin-wall aluminum alloy, is filled with the insulation layer of making of the polyurethane expanded material between the two;

(2) lateral surface in casing one side offers cavity, cavity top is equipped with fan and drive motors thereof, the bottom of cavity be equipped with can according to its two ends the different semiconductor devices that freeze or heat of alive direction, the inside and outside both sides of this device are close to respectively and are equipped with by bolt and the direct-connected heat conduction of aluminium alloy inner bag (cold) body and fin;

(3) control circuit is made up of main circuit and automatic temperature control circuit two parts thereof of semiconductor devices; wherein be connected to refrigeration in the main circuit, heat the double-throw selector switch, the output two ends of switch then and the fan electromotor that is connected with indicator lamp, freezes, heats semiconductor and thermal protection circuit and rectifier bridge and be connected on rectification bridge output end.

2, refrigeration as claimed in claim 1, heat, incubator, it is characterized in that used refrigeration, heat product DT12705 or DT12703 that semiconductor devices is the big the whole nation border Electronics Co., Ltd. of China.

3, refrigeration as claimed in claim 1, heat, incubator, it is characterized in that fan, freezing, heat semiconductor devices, fin all is vertical the placement.

4, as claim 1 or 3 described refrigeration, heat, incubator, it is characterized in that electric fan is right spiral shell and executes shape, and its rotation direction is to the force ventilated clockwise direction of the fin of its downside.

5, refrigeration as claimed in claim 1, heat, incubator, it is characterized in that being equipped with on the wall box cavity protection housing, is provided with barrier shape breach in the middle of the housing top, its external form is the garden arcuation, and has the air draft breach on the right side of its garden arc retaining wall.

6, refrigeration as claimed in claim 1, heat, incubator, it is characterized in that in main circuit semiconductor refrigerating, heat in the parallel branch of device and be serially connected with the thermal protection circuit that the self-recovering type electrothermal relay made from bimetal leaf is made device.

7, refrigeration as claimed in claim 1, heat, incubator, it is characterized in that automatic temperature control circuit is by refrigeration, heats the selection circuit, the temperature-sensitive circuit that is made of thermistor, the voltage comparator circuit that is made of operational amplifier, the single stabilization delay circuit, indicating circuit and the relay drive circuit that are made of 555 time base circuits are formed.