CN1357270A - Electronic food preserving cupboard - Google Patents

Abstract

The electronic food preserving cupboard has built-in control circuits including sampling and amplifying circuit, A/D converter circuit, microcomputer chip, electronic heat balancing circuit, ozone and plasma generator circuit and humifity regulator circuit controlling heat pump, fan, surface discharge ceramic and evaporating dish separately. The present invention combines the electronic heat balancing technology to inhibit breach, the humidity controlling technology to prevent drying up and yellowing and the ozone and plasma generating technology to kill bacteria together, so that it can avoid the cell sap loss, prevent frost damage, drying up and yellowing of fruits and vegetable, kill bacteria and preserve food in high quality.

Description

Electronic food preserving cupboard

The present invention relates to a kind of food preservation unit, especially a kind of food fresh keeping cabinet belongs to the home electric technical field.

Along with the quickening of growth in the living standard and work rhythm, people more and more pay attention to food fresh keeping, and are also more and more higher to the fresh-keeping requirement of food.It is fresh-keeping etc. that existing preservation method mainly contains refrigeration, controlled atmosphere, medicine.Wherein cold storing and fresh-keeping delays the metabolism of food by suppress breathing, and shortcoming is can't kill bacteria; Medicine is fresh-keeping mainly to delay food spoilage by kill bacteria, but because of medicament residue, can have side effects; Controlled atmosphere is mainly breathed by filling inhibition such as nitrogen, and its shortcoming is the cost height.

What really step into huge numbers of families in fact, at present is that refrigerator storage is fresh-keeping.The design feature of refrigerator need not be spoken more, and people are very familiar.Adopt the problem of the fresh-keeping existence of refrigerator also obvious to all.The first, meat product cell liquid in refrigerating process will change into ice crystal, and ice crystal is passed in time to grow up gradually and poked cell membrane, will lose delicate flavour because of cell liquid runs off after thawing; It two is that fruit or vegetable type food can produce freeze injury and yellow because of the low temperature in the refrigerating chamber, low humidity in cold storage procedure; It three is that cold storage procedure can't kill bacteria, produce peculiar smell in the refrigerating chamber, so chilled food must be through eating safely after the sterilization.

The objective of the invention is to: at the problem of above-mentioned existing preservation technique existence, propose a kind ofly can to avoid that meat product cell liquid runs off, can prevent again that fruit or vegetable type food from damaging to plants caused by sudden drop in temperature, freeze injury and withered yellow, can be fresh-keeping again can kill bacteria electronic food preserving cupboard.

In order to achieve the above object, in the cabinet of electronic food preserving cupboard of the present invention control circuit is housed, this control circuit comprises the sampling amplifying circuit, analog to digital conversion circuit, microcomputer chip, and electronics thermal balance circuit, ozone and plasma generation circuit, the humidity regulation circuit, described electronics thermal balance circuit, ozone and plasma generation circuit, the humidity regulation circuit is by amplifying circuit, the relay controlled device constitutes, controlled device in the electronics thermal balance circuit is respectively heat pump and fan, the controlled device of ozone and plasma generation circuit is the creeping discharge pottery, the controlled device of humidity regulation circuit is an evaporating dish, the annexation of foregoing circuit and components and parts is: the input of the output termination analog to digital conversion circuit of sampling amplifying circuit, the input of the output termination micro computer of analog to digital conversion circuit, the control output end of micro computer is respectively through electronics thermal balance circuit, ozone and plasma generation circuit, amplifying circuit in the humidity regulation circuit connects the line bag of relay separately, and the break-make end of each relay connects corresponding controlled device respectively.

After the electronic food preserving cupboard energising of the present invention, sampling element is with the temperature in the cabinet, parameters such as humidity become the signal of telecommunication, after amplifying, be delivered to analog to digital conversion circuit, convert digital data transmission to by analog to digital conversion circuit and give micro computer, micro computer compares after the computing digital information from output output control signal corresponding with the parameter of program setting, respectively through electronics thermal balance circuit, ozone and plasma generation circuit, amplifying circuit in the humidity regulation circuit, control controlled device work or break-off by relay again, thereby keep the temperature in the antistaling cabinet, humidity and ozone, plasma concentration all remains on the optimum state of setting.Because the Humidity Control of the electronics thermal balance Refrigeration Technique that the present invention will suppress to breathe, the yellow that prevents to dry up and the ozone of kill bacteria and plasma generation technique are organic and reasonably combine, it is played a role jointly, therefore can avoid that meat product cell liquid runs off, can prevent again that fruit or vegetable type food from damaging to plants caused by sudden drop in temperature, freeze injury and withered yellow, can be fresh-keeping again can kill bacteria, thereby really realize high-quality food fresh keeping.Especially owing to adopt electronics thermal balance Refrigeration Technique to replace traditional refrigeration system, save expensive compressor, therefore greatly reduced production cost, had vast market prospect.

The invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is the circuit theory diagrams of one embodiment of the invention.

Fig. 2 is the structural representation of heat pump among the embodiment.

Control circuit shown in Figure 1 is housed in the electronic food preserving cupboard of present embodiment, sampling amplifying circuit in this control circuit is connected in series with two-level operating amplifier respectively by dried quick resistance R T1 and humistor RT2, and 2 and 7 pin that connect the DG211 electronic switch module more respectively constitute; Analog to digital conversion circuit and micro computer are respectively by AD7572 and 89C52 chip and the realization of conventional peripheral circuit thereof, electronics thermal balance circuit, ozone and plasma generation circuit, the humidity regulation circuit is respectively by triode T1, T2, T3, T4, T5, the second amplifying circuit that T6 forms, relay J C1, JC2, JC3 and controlled device constitute, be divided into two in the electronics thermal balance circuit, controlled device is respectively heat pump RB and fan F1, F2, the controlled device of ozone and plasma generation circuit is the creeping discharge pottery FDTC that drives through booster circuit SYDL, and the controlled device of humidity regulation circuit is evaporating dish ZFM.The annexation of foregoing circuit and components and parts is: 3 of the DG211 electronic switch module in the sampling amplifying circuit, 6 bipods are as output, connect input 1 pin of AD7572 analog-to-digital conversion module, output 8 to 16 pin of analog to digital conversion circuit AD7572 connect input 32 to 39 pin of 89C52 microcomputer chip respectively, in addition, 1 of DG211 chip, 8 bipods connect 5 of 89C52 microcomputer chip respectively, 6 bipods, 16 of AD7525 chip, 15 bipods connect 16 of 89C52 microcomputer chip through 74LS08 with door, 17 pin, the control output end 3 of 89C52 microcomputer chip, 2,1 pin is respectively through electronics thermal balance circuit, ozone and plasma generation circuit, second amplifying circuit in the humidity regulation circuit meets relay J C1 separately, JC2, JC3, the line bag, each relay J C1, JC2, the break-make end of JC3 meets corresponding controlled device heat pump RB respectively, fan F1, F2, creeping discharge pottery FDTC, evaporating dish ZFM.KGDY is a Switching Power Supply among Fig. 1, provides power supply to The whole control circuit and generation circuit.

In the present embodiment structure of heat pump as shown in Figure 2, this heat pump is made of temperature sensitive semiconductor 3, condensate film 4, fin 2, heat shield 1.The cold and hot surface of temperature sensitive semiconductor 3 is clipped in respectively between condensate film 4 and the fin 2, all stuffed heat insulated 1 at the two ends of temperature sensitive semiconductor chip 3.Can give full play to the refrigeration of temperature sensitive semiconductor chip like this, obtain desirable refrigeration.

When above-mentioned electronic food preserving cupboard is worked, doing quick resistance R T1 and humistor RT2 can be with in-cabinet temperature, the integrated information parameter of humidity etc. becomes the signal of telecommunication, after amplifying, computing is delivered in the modulus conversion chip, convert digital data transmission to by analog-digital chip and give micro computer, micro computer with the parameter comparison operation of digital information and program setting after from output output control signal corresponding, respectively through electronics thermal balance circuit, ozone and plasma generation circuit, second amplifying circuit in the humidity regulation circuit amplifies, again by relay J C1, JC2, JC3 control controlled device heat pump RB, fan F1, F2, creeping discharge pottery FDTC, evaporating dish ZFM work or break-off, thus keep the interior temperature of antistaling cabinet, humidity and ozone, plasma concentration all remains on the optimum state of setting.

Present embodiment is owing to adopt electronics thermal balance Refrigeration Technique to replace traditional refrigeration system, saved expensive compressor, therefore greatly reduce production cost, simultaneously because the acting in conjunction of control automatically of ozone, plasma sterilization and humidity, make the food fresh keeping quality better, storage time is longer, and is edible safer.

Claims (5)

1. electronic food preserving cupboard, control circuit is housed in the cabinet, it is characterized in that: described control circuit comprises the sampling amplifying circuit, analog to digital conversion circuit, microcomputer chip, and electronics thermal balance circuit, ozone and plasma generation circuit, the humidity regulation circuit, described electronics thermal balance circuit, ozone and plasma generation circuit, the humidity regulation circuit is by separately amplifying circuit, relay and controlled device constitute, controlled device in the electronics thermal balance circuit is heat pump and fan, the controlled device of ozone and plasma generation circuit is the creeping discharge pottery, the controlled device of humidity regulation circuit is an evaporating dish, the annexation of foregoing circuit and components and parts is: the input of the output termination analog to digital conversion circuit of sampling amplifying circuit, the input of the output termination micro computer of analog to digital conversion circuit, the control output end of micro computer is respectively through electronics thermal balance circuit, ozone and plasma generation circuit, amplifying circuit in the humidity regulation circuit connects the line bag of relay separately, and the break-make end of each relay connects corresponding controlled device respectively.

2. electronic food preserving cupboard according to claim 1, it is characterized in that: described heat pump is made of temperature sensitive semiconductor, condensate film, fin, heat shield, described temperature sensitive semi-conductive cold and hot surface is clipped in respectively between condensate film and the fin, all stuffed heat insulated of the two ends of temperature sensitive semiconductor chip.

3. electronic food preserving cupboard according to claim 1 is characterized in that: described sampling amplifying circuit is connected in series with two-level operating amplifier respectively by dried quick resistance and humistor, and the input that connects electronic switch module more respectively constitutes.

4. electronic food preserving cupboard according to claim 1 is characterized in that: analog-digital conversion circuit as described and micro computer are respectively by AD7572 and 89C52 chip and the realization of conventional peripheral circuit thereof.

5. electronic food preserving cupboard according to claim 1 is characterized in that: the creeping discharge pottery of the controlled device of described ozone and plasma generation control circuit for driving through booster circuit.