CN106307920A - Refrigeration and heating lunch box with thermal insulation effect - Google Patents

Refrigeration and heating lunch box with thermal insulation effect Download PDF

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Publication number
CN106307920A
CN106307920A CN201610599448.9A CN201610599448A CN106307920A CN 106307920 A CN106307920 A CN 106307920A CN 201610599448 A CN201610599448 A CN 201610599448A CN 106307920 A CN106307920 A CN 106307920A
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layer
storage material
box body
heat
heat storage
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CN201610599448.9A
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CN106307920B (en
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胡军
王祯
王甜甜
何世军
马晓迅
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Northwest University
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Northwest University
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    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C11/00—Receptacles for purposes not provided for in groups A45C1/00-A45C9/00
    • A45C11/20—Lunch or picnic boxes or the like
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C13/00—Details; Accessories
    • A45C13/02—Interior fittings; Means, e.g. inserts, for holding and packing articles
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C13/00—Details; Accessories
    • A45C13/10—Arrangement of fasteners
    • A45C13/12—Arrangement of fasteners of press-button or turn-button fasteners
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/24—Warming devices
    • A47J36/2405—Warming devices for warming food contained in vessels immersed in a water bath, e.g. chafers or steam tables
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/24—Warming devices
    • A47J36/28—Warming devices generating the heat by exothermic reactions, e.g. heat released by the contact of unslaked lime with water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D31/00—Other cooling or freezing apparatus

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)

Abstract

The invention provides a refrigeration and heating lunch box with a thermal insulation effect. The refrigeration and heating lunch box comprises a box body and a box cover and the box body and the box cover are tightly fastened through a locking device. Each one of the box body and the box cover comprises a vacuum-stainless steel external layer, a stainless steel internal layer and an interlayer space between the external layer and the internal layer. A first water storage material layer, a first heating and heat storage layer and a second water storage material layer are orderly arranged in the interlayer space at the bottom of the box body from bottom to top. A refrigeration and heat storage layer is arranged in the interlayer space at the side wall of the box body. A second heating and heat storage layer is arranged in a second interlayer space of the box cover. The refrigeration and heat storage layer is filled with an organic heat storage material. The first heating and heat storage layer and the second heating and heat storage layer are filled with salt hydrate phase-change heat storage materials. The refrigeration and heating lunch box with a thermal insulation effect has a simple structure and good heat insulation effects, prolongs a food storage period as long as possible through refrigeration and can heat foods so that nutrients of foods can be well absorbed by the human body.

Description

A kind of cooling and warming incubation canteen
Technical field
The present invention relates to articles for daily use field, be specifically related to a kind of cooling and warming incubation canteen.
Background technology
Nowadays, can hear that people talk about food-safety problem everywhere, edible rotten due to microorganism amount reproduction Food is huge to the harm of health, and it is sick that it can infect gastrointestinal infection, causes gastroenteritis even to cause alimentary toxicosis.Suitably Temperature moisture and nutritional condition under, the breeding of microorganism is drastically, as long as it is one that proper temperature contains the lunch box of food The individual one's own little world making microorganism well to breed, the suitableeest the bread worm of microorganism is about 30-40 DEG C, due to the water of food Divide and nutritional labeling can not change, reduce temperature and just may be used for suppressing the breeding of microorganism, and this measure can be effective Reduction food in the lipolytic ability of lipolytic enzyme, and then at utmost postpone the rotten of food.Make a general survey of on the market Common incubation canteen simply plays the effect of insulation, and at temperature during fall, the temperature retention time of 30-40 DEG C can be the longest, this Sample will cause bacterial micro-organism amount reproduction to cause food spoilage, and food can not preserve for a long time.Therefore, exploitation one can The lunch box of cold preservation-insulation-heating-be incubated again is the most necessary.
Summary of the invention
For deficiency of the prior art, the present invention provides a kind of cooling and warming incubation canteen, and this lunch box structure is simple, no Only can freeze and reach to preserve the most for a long time the purpose of food, hot food can also be added simultaneously and make nutrition therein more preferable It is absorbed by the body.
The cooling and warming incubation canteen that the present invention provides, wraps respectively including box body and lid, described box body and described lid Including vacuum-rustless steel outer layer and rustless steel internal layer, the vacuum of described box body-rustless steel outer layer and described rustless steel internal layer are at top Edge engages, has the first mezzanine space, described box between the vacuum-rustless steel outer layer of described box body and described rustless steel internal layer Between vacuum-rustless steel outer layer and the described rustless steel internal layer of lid, there is the second mezzanine space；
Be positioned at the first mezzanine space of described box body base section be sequentially provided with from the bottom to top the first water storage material layer, One heats recuperation layer and the second water storage material layer, and the first mezzanine space being positioned at described box side wall part is provided with refrigeration accumulation of heat Layer；It is sequentially provided with the 3rd water storage material layer in described second mezzanine space from the bottom to top, second heats recuperation layer and the 4th water storage Material layer；
Being filled with the first phase change heat storage material in described refrigeration recuperation layer, described first phase change heat storage material is organic accumulation of heat Material；Described first heats recuperation layer and described second heats and is all filled with the second phase change heat storage material in recuperation layer, and described Two phase change heat storage materials are hydrous salt phase transition heat-storing material；
Described box body and described lid are sealed by locking device and cover.
Preferably, described first phase change heat storage material is the positive 16 organic heat-storing materials of carbon paraffin, and described second phase transformation stores The main component of hot material is Na2HPO4.12H2O crystal.
It is highly preferred that described second phase change heat storage material is by the Na of quality accounting 94-97%2HPO4.12H2O crystal, 1- The anti-phase separation agent of 2% and the anti-cryogen of crossing of 2-4% form.
It is highly preferred that described anti-phase separation agent is carboxymethyl cellulose, described anti-cryogen of crossing is to mix according to mass ratio 1:1 Boric acid and the mixture of Borax.
Preferably, described first water storage material layer, described second water storage material layer, described 3rd water storage material layer and Described 4th water storage material layer is made by bamboo fibre.
Preferably, it is additionally provided with the separation steel plate of at least one hollow in described box body, described box body is separated at least two The individual district that contains, is filled with third phase change heat storage material, described third phase change heat storage material and the first phase transformation in described separation steel plate Heat-storing material material is identical.
Preferably, described locking device includes multiple being rotatably connected at the snap close at described lid edge by pivot, with And it being fixedly connected on the multiple buckles on described box body outer wall, described snap close fastens with described buckle one_to_one corresponding.
It is highly preferred that the quantity of described snap close and described buckle is respectively 4-6.
The cooling and warming incubation canteen that the present invention provides has the advantages that
Main material uses rustless steel to be processed, and stainless-steel vacuum technology is the most ripe, and difficulty of processing is little, heat-storing material After after the mezzanine space being placed between rustless steel, clearance aperture is carried out welded seal or uses integral shaping method, processing simplicity, Can produce in enormous quantities, the sealing between lid and box body uses steel buckle structure, compares helicitic texture processing simplicity, and sealing Good, it is ensured that the effect of heat insulation that lunch box is internal with extraneous.
Accompanying drawing explanation
The box body structure schematic diagram of the cooling and warming incubation canteen that Fig. 1 provides for the embodiment of the present invention；
The sectional view of a kind of cooling and warming incubation canteen that Fig. 2 provides for the embodiment of the present invention；
The vertical view of the box body of a kind of cooling and warming incubation canteen that Fig. 3 provides for the embodiment of the present invention cuts open figure.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that, technical scheme can be practiced, below in conjunction with specifically The invention will be further described for embodiment, but illustrated embodiment is not as a limitation of the invention.
A kind of cooling and warming incubation canteen, the most as Figure 1-3, wraps respectively including box body and lid, box body and lid Including vacuum-rustless steel outer layer and rustless steel internal layer, the vacuum of box body-rustless steel outer layer and rustless steel internal layer connect on top sides edge Close, the vacuum of box body-there is between rustless steel outer layer and rustless steel internal layer the first mezzanine space 103, the vacuum-rustless steel of lid There is between outer layer and rustless steel internal layer the second mezzanine space 203；
Be positioned at the first mezzanine space 103 of box body base section be sequentially provided with from the bottom to top the first water storage material layer 108, First heats recuperation layer 106 and the second water storage material layer 107, and the first mezzanine space 103 being positioned at box side wall part is provided with Refrigeration recuperation layer 105；It is sequentially provided with the 3rd water storage material layer 206, second in second mezzanine space 203 from the bottom to top and heats accumulation of heat Layer 204 and the 4th water storage material layer 205；Refrigeration recuperation layer 105 is filled with the first phase change heat storage material, the first phase-transition heat-storage material Material is organic heat-storing material；First heats recuperation layer 106 and second heats and is all filled with the second phase-transition heat-storage material in recuperation layer 204 Material, the second phase change heat storage material is hydrous salt phase transition heat-storing material；Box body and lid are sealed by locking device and cover.
For the concrete structure of clearer expression cooling and warming incubation canteen, the most as shown in Figure 1, box body in Fig. 1 Vacuum-rustless steel outer layer is 101 indications, and the rustless steel internal layer of box body is 102 indications, the vacuum of box body-rustless steel outer layer and not The first mezzanine space between rust steel internal layer is 103 indications；The vacuum of lid-rustless steel outer layer is 201 indications, lid stainless Steel internal layer is 202 indications, and the second mezzanine space of the vacuum of lid-between rustless steel outer layer and rustless steel internal layer is 203 indications.
Preferably, above-mentioned first phase change heat storage material is positive 16 carbon paraffin, above-mentioned second phase change heat storage material main Composition is Na2HPO4.12H2O crystal；It is highly preferred that above-mentioned second phase change heat storage material is by quality accounting 94-97% Na2HPO4.12H2O crystal, the anti-phase separation agent of 1-2% and 2-4% are anti-crosses cryogen composition, and the most anti-phase separation agent is carboxymethyl Cellulose, anti-cryogen of crossing is boric acid and Borax；First water storage material layer the 108, second water storage material layer the 107, the 3rd water storage material Layer 206 and the 4th water storage material layer 205 are made by bamboo fibre, and water storage is effective.Recuperation layer 106 and is heated first Two heat recuperation layer about 204 is all provided with water storage material layer, and on the one hand upper strata water storage material layer can absorb first and heats recuperation layer 106 and second aqueous water heating recuperation layer 204 phase change heat storage material at the middle and upper levels and steam, lower floor's water storage material layer absorbs lower floor The aqueous water of phase change heat storage material；On the other hand, upper and lower water storage material layer can add hot food faster.
Above-mentioned cooling and warming incubation canteen uses stainless jacket structure, positive ten filled in its refrigeration recuperation layer 105 Six carbon paraffin are organic phase change material, and its melting temperature is 18 DEG C, and once temperature is less than 18 DEG C, and it is always maintained at solid, shaped State, once environment temperature is higher than 18 DEG C, and this paraffin can become liquid absorbent and store energy, to guarantee that environment temperature drops to 18 DEG C, reduce the effect of food temperature；And first heats in recuperation layer 106 and second heats recuperation layer 204 master all filled Want composition Na2HPO4.12H2O crystal is inorganic hydrous salt phase transition heat-storing material, and inorganic hydrous salt phase transition heat-storing material has and compares Big heat of fusion and fixing fusing point (the really temperature of inorganic hydrated salt abjection water of crystallization), the water of crystallization of abjection makes salt melt And absorb heat, generation inverse process when heating for food, absorbs aqueous water and heat release generates inorganic hydrated salt structure again； Na2HPO4.12H2The melting temperature of O crystal is 40 DEG C, and once temperature is more than 40 DEG C, and abjection water of crystallization is made salt melt by this crystal And store the heat of 279kJ/kg, now water of crystallization becomes aqueous water inflow bamboo fibre preservation, once needs to add food Heat, rocks up and down by lunch box, makes the Na of aqueous water and the generation being stored in bamboo fibre2HPO4Contact, regenerates Na2HPO4.12H2O crystal.Now, first heat recuperation layer 106 and second and heat recuperation layer 204 and will release substantial amounts of heat, it is achieved Heating to food, but liberated heat is not over 40 DEG C, because Na2HPO4.12H2The fusing point of O crystal is 40 DEG C, exceedes 40 DEG C it will no longer undergo phase transition, also will not neither endothermic nor exothermic, final heat foods only can be made to 40 DEG C, and then reach suitable people The temperature of edible food.
Owing to the heat conductivity of the thermal conductivity ratio hydrous salt phase transition heat-storing material of organic heat-storing material is low, therefore, in temperature Spend higher food when being put in lunch box, the Na that heat conductivity is high2HPO4.12H2O crystal has first absorbed required heat, water of crystallization Becoming aqueous water and be stored in water storage material layer, the most positive 16 carbon paraffin absorb remaining heat, until food temperature reaches About 18 DEG C, stop heat absorption.
Additionally, the heat conductivity of positive 16 carbon paraffin is about 0.12W/ (m.K), hydrated salt Na2HPO4.12H2O crystal due to There is hydrone, heat conductivity is about 0.7W/ (m.K).Therefore when cooling insulation, the carrying out that food temperature can be relatively slow Cooling, reaches the low-temperature protection of persistence.When heating up to food, the Na of high thermal conductivity coefficient2HPO4.12H2O crystal can be quickly Food heats, and heats the speed with cooling and differs about 7 times, it is ensured that when heating for food, heat will not be freezed immediately Recuperation layer 105 absorbs, and makes people's temperature when having dinner reach 40 DEG C as far as possible.
Second phase change heat storage material be mainly composed of Na2HPO4.12H2O crystal, mass fraction is the carboxylic first of 1%-2% The effect of base cellulose acts as anti-phase separation agent, in order to will not be at Na2HPO4.12H2O crystal occurs to generate when melting or synthesize Other hydrates, and cause hydrous salt phase transition heat-storing material not recycle, after making the heat storage performance of this hydrate decline Really.Mass fraction is the boric acid of about 3% and the effect of Borax of about 3% acts as and anti-crosses cryogen, in order to stable Na2HPO4.12H2The temperature that O undergoes phase transition, prevent temperature too low or too high time just can undergo phase transition and cause heat accumulation or heating effect It is deteriorated.
For the composition of the second phase change heat storage material, with the Na of quality accounting 94-97%2HPO4.12H2O crystal, 1-2% Anti-phase separation agent and the anti-cryogen composition of crossing of 2-4%, the most anti-cryogen of crossing is the mixture of boric acid and Borax.In the range of join Can well realize heat accumulation function than all, the such as second phase change heat storage material is by the Na of quality accounting 97%2HPO4.12H2O is brilliant The anti-of body, the anti-phase separation agent of 1% and 2% crosses cryogen composition, the anti-mass ratio crossing cryogen mesoboric acid and Borax is 1:1, they Component add and be 100%.
Lunch box outer layer uses vacuum-rustless steel insulation construction, and its rustless steel heat conductivity is 17W/ (m.K), and heat is permissible Preferably transmitting inside incubation canteen, the heat conductivity of vacuum layer is 0.023W/ (m.K), owing to the transmission of heat needs Medium, vacuum structure does not has any medium, and heat cannot scatter and disappear from this structure, and the heat conductivity of this vacuum layer is owing to being less than 0.05W/ (m.K), it is believed that this structure can effectively completely cut off the energy exchange inside and outside lunch box, makes to be equivalent to inside lunch box insulator System, can well realize the insulation effect of lunch box.
Owing to heat transfer has three kinds of modes: conduction, convection current and radiation, wherein, conduction is present between food and lunch box, adopts Can effectively hinder the conduction of heat with Stainless Steel Vacuum insulation construction and then food is effectively cooled down insulation.Convection current is only Can be present in the situation that lunch box is opened, therefore when lunch box is opened, heat exchange is the fastest, in order to be preserved by food Longer time, the sealing between lid and box body must be good, therefore uses locking device to seal and covers, before having a meal as far as possible Lid is covered and can effectively carry out low-temperature insulation.Secondly as temperature only has 18 DEG C in lunch box, its heat is in the form of heat Being substantially negligible to external radiation, thus, the comprehensive three kinds of thermaltransmission modes of above-mentioned incubation canteen prevent hot institute as far as possible There is the exchange of approach and then food is carried out low-temperature insulation, food can be preserved as far as possible for more time and not because of high temperature Rotten.
It should be noted that above-mentioned locking device is divided into two parts, it is respectively provided with and box body outer wall and lid edge, in fact Existing structural formula is diversified, and a kind of preferably scheme is: this locking device includes multiple being rotatably connected at box by pivot The snap close 302 at lid edge, and the multiple buckles 301 being fixedly connected on box body outer wall, lid covers on box body, its snap close 302 after the direction near box body outer wall rotates, and seals with buckle 301 one_to_one corresponding and fastens.
Generally, the quantity of snap close 302 and buckle 301 is respectively 4-6, can meet seal request.
Concrete, for Na2HPO4.12H2O crystal and the consumption of positive 16 carbon paraffin, be ideally calculated as follows:
Q=cm △ t, wherein Q is up (reduction) food institute calorific requirement；C is the specific heat capacity of food, calculates by rice and is about 2.930kJ/(kg.K)；M is quality；△ t is temperature variation；
M=ρ V, wherein m is quality；ρ is the density of food, calculates by cooked rice and is about 0.8kg/L；V is the appearance of lunch box Long-pending；
Assume that this lunch box capacity is V=S.h=90 × 60 × 3 × 1000 (mm)=1620000mm according to Fig. 13= 1.62L；
The temperature of hot meal of assuming to take the dish out of the pot is 90 DEG C, calculates through above formula:
The quality of 1.62L rice is m=1.62L × 0.8kg/L=1.296kg
(1) the cooling first stage 90 DEG C-40 DEG C:
Q1=2.930kJ/ (kg.K) × 1.296kg × (90-40)=189.864kJ
And Na2HPO4.12H2The melting energy of O crystal is 279kJ/kg
Then cool to 40 DEG C from hot rice and only need m1The Na of=189.864kJ/279kJ/kg=0.681kg2HPO4.12H2O Crystal.
(2) cooling second stage 40 DEG C-18 DEG C:
Q2=2.930kJ/ (kg.K) × 1.296kg × (40-18)=83.54kJ
And the melting energy of positive 16 carbon paraffin is 237kJ/kg
Then rice drops to 18 DEG C from 40 DEG C and only needs m2The positive 16 carbon paraffin of=83.54kJ/237kJ/kg=0.352kg are i.e. Can.
(3) temperature rise period:
Q3=Q2=83.54KJ
Na2HPO4.12H2The melting energy of O crystal is 279kJ/kg
Then rice is warming up to 40 DEG C from 18 DEG C and needs m3The Na of=83.54kJ/279kJ/kg=0.299kg2HPO4.12H2O is brilliant Body.
To sum up can be calculated, ideally positive 16 carbon paraffin (effect refrigeration) 0.352kg in lunch box surrounding and dividing plate, Na is needed with lid bottom lunch box2HPO4.12H2O crystal (effect heats) 0.681kg.
Therefore, positive 16 carbon paraffin are about 352g, Na2HPO4.12H2O crystal is that about 681g can realize above-mentioned mesh 's.
Solid-liquid dilatancy in view of paraffin is relatively big, and density of solid is 835kg/m3, fluid density is 776kg/m3, calculate The liquid volume of required positive 16 carbon paraffin is: V1=m2/ρ1=0.352kg/776kg/m3=0.454L.It is also contemplated that due to Food temperature after cooling is relatively low, and extraneous temperature is high, and heat can pass through slowly the form of conduction of heat and pass to food, in order to Refrigeration recuperation layer 105 still can effectively regulate the temperature of food, absorbs the heat of external world's transmission, the most positive 16 carbon paraffin Volume should be greater than 0.454L, the actual recuperation layer 105 that freezes man-hour that adds just should have 0.543kg (about 0.7L during liquid) left and right 16 carbon paraffin.
As it is shown in figure 1, the volume of refrigeration recuperation layer 105 is about:
V2=S.h=(220 × 10 × 2+90 × 10 × 4) × 100 (mm)=800000mm3=0.8L.Refrigeration recuperation layer The 105 organic heat-storing materials that can fill about 0.7L, it is believed that this size design is reasonable.
Na2HPO4.12H2The density of O crystal is 1520kg/m3, calculate required Na2HPO4.12H2The volume of O crystal is: V2 =m3/ρ2=0.681kg/1520kg/m3=0.000448m3=0.448L.
The content of the refrigeration recuperation layer 105 of incomplete phase transformation is about: V=0.7L-0.454L=0.246L
M=V. ρ1=0.246L × 776kg/m3=0.191kg
The refrigeration recuperation layer 105 of phase transformation completely does not undergoes phase transition the energy of needs completely
Q4=0.191kg × 237kJ/kg=45.267kJ
Being 189.864kJ owing to heating the absorption heat of recuperation layer, heating food theory need to consume 83.54kJ, and heating is not The refrigeration recuperation layer 105 of phase transformation completely need to consume 45.267kJ, 189.964kJ and be far above 128.807kJ, therefore Na2HPO4.12H2The content of O be 0.448L (0.681kg) be rational.
If first at the bottom of cover of the lunch box and lunch box heats recuperation layer 106 and second and heats recuperation layer 204 and be highly h mm
Then V2=448000mm3=220 × 110 × h (mm)
Calculate about h=18.51mm.
Same, it is considered to extraneous conduction of heat, first heats recuperation layer 106 and second heats and contains in recuperation layer 204 Na2HPO4.12H2The volume of O should be greater than 0.448L, h and adds and should be about 20mm man-hour.
Lunch box cooling heats up as follows to the requirement of food amount:
The quality assuming food is M, Na2HPO4.12H2The heat of O crystal preferential absorption food, allows the temperature of food reduce Being 40 DEG C, it absorbs heat and is about Q=2.930kJ/ (kg.K) × M kg × (90-40)=146.5M kJ.Further, positive ten Six carbon wax phase change make food temperature be reduced to 18 DEG C, and it absorbs heat and is about Q=2.930kJ/ (kg.K) × M kg × (40- 18)=64.46M kJ.
The calculating process heating up food is as follows: the energy needed for all positive 16 complete phase transformations of carbon paraffin is 128.691kJ.That is: 146.5M > 64.45M+ (128.691kJ-64.45M)
Calculate M > 0.878kg, when filled a bowl with rice dish is more than 878g, food can be lowered the temperature accurately and heat up.Filled a bowl with rice When dish is less than 878g, although food can effectively be lowered the temperature, but temperature rise effect is not the most notable.
Lunch box cooling temperature-rise period is analyzed as follows:
Assume when the food in lunch box is full Sheng state, as follows to the process of food cooling: initially in this accumulation of heat lunch box Refrigeration recuperation layer 105, first heat recuperation layer 106 and second to heat recuperation layer 204 be all solid state, when the foods of 90 DEG C are put Time in lunch box, owing to first heats recuperation layer 106 and second and heat and have inorganic hydrous salt phase transition accumulation of heat material in recuperation layer 204 Material, the height of its thermal conductivity ratio organic phase change material, the most quickly absorb heat, Na2HPO4.12H2Part knot in O crystal Brilliant water becomes aqueous water and is stored in bamboo fibre, its by the food heat absorption of 90 DEG C to 40 DEG C time, stop heat absorption, perfect condition Under need 0.681kg Na2HPO4.12H2O crystal.And then due to positive 16 carbon paraffin heat conductivitys in refrigeration recuperation layer 105 Relatively low, and phase transition temperature is 18 DEG C, it can continue to absorb the heat of food in lunch box, now heats recuperation layer due to first 106 and second Na heating recuperation layer 2042HPO4.12H2The aqueous water of O crystal abjection is stored in bamboo fibre, does not exist automatically The function of homoiothermic, the temperature of food is continued to drop to 18 DEG C by 40 DEG C, ideally needs positive ten by the most positive 16 carbon paraffin Six carbon paraffin 0.352kg, in addition to temperature is low in avoiding lunch box, can be transmitted to lunch box through long period ambient temperature Inside, therefore needs to positive 16 some surpluses of carbon paraffin, and the actual positive 16 carbon paraffin adding 0.543kg in man-hour ensure to absorb More heat, and then the purpose of the food temperature that reaches automatically to lower the temperature, make the low temperature state that food is maintained at 18 DEG C for a long time.
The process heating up food is as follows: when food to be eaten, rocks lunch box, makes the aqueous water being stored in bamboo fibre Bamboo fibre and Na is shaken out due to inertia2HPO4Contact regenerates Na2HPO4.12H2O crystal, this process first heats accumulation of heat It is that food carries out heat temperature raising that layer 106 and second heats recuperation layer 204 by substantial amounts of for releasing heat, and ideally required energy is about For 83.54kJ.May be not up in view of positive 16 carbon paraffin before heating and become the state that liquid is no longer absorbed heat completely, therefore Na2HPO4.12H2It is 45.267kJ that the amount of O crystal is considered as the surplus institute calorific requirement of positive 16 carbon paraffin, and 0.681kg Na2HPO4.12H2The heat of O absorption of crystal is the energy that 189.864kJ is far above needed for heating, therefore heats the system of recuperation layer Thermal effect is good.Furthermore, it is contemplated that extraneous and within lunch box conduction of heat, i.e. required Na under virtual condition2HPO4.12H2O crystal Content should be more than 0.681kg.
Preferably, being additionally provided with the separation steel plate 104 of at least one hollow in above-mentioned box body, typically individual with 1-2 is optimal, logical Over-segmentation steel plate is filled with third phase change heat storage material in box body is separated into the district of filling a bowl with rice of 2-3, and separation steel plate 104, the Three phase change heat storage materials and the first phase change heat storage material material are identical, are hydrous salt phase transition heat-storing material；
Such setting, is not only separated food by kind, and food is big with the contact area of lunch box, the fastest prompt drop Temperature or intensification.
It should be noted that the lunch box for specific volume, according to calculating above, required hydrous salt phase transition accumulation of heat Material is divided into first and heats recuperation layer 106 and second and heat in recuperation layer 204, and total amount is constant.And the first phase change heat storage material Being positive 16 carbon paraffin with third phase change heat storage material, when not setting segmentation steel plate in lunch box, positive 16 carbon paraffin are all filled in In first mezzanine space 103 of box side wall part；When arranging segmentation steel plate, the first interlayer being divided into box side wall part is empty Between in 103 and in segmentation steel plate, total amount is constant.
The advantage of the cooling and warming incubation canteen of above-mentioned offer is as follows:
(1) the internal same use stainless steel material Nonpoisonous, non-environmental-pollution of incubation canteen, can allow people not worry that lunch box is subject to High temperature affects the material safety problem caused.
(2) the heat accumulation mode of above-mentioned heat accumulating type incubation canteen is simple, and the food that only need to take the dish out of the pot is put in lunch box can be effective Make Na2HPO4.12H2Water of crystallization in O material becomes aqueous water, and then aqueous water will be flowed down by action of gravity and be stored in bamboo fibre Dimension effectively stores heat.
(3) refrigeration modes of above-mentioned heat accumulating type incubation canteen is simple, and winter uses very convenient, owing to ambient temperature is general Less than 18 DEG C, the most positive 16 carbon paraffin the most all can be present in this lunch box in solid form, when food is placed in lunch box, and two Kind of phase change heat storage material can automatically for food regulation temperature, and then the most at last temperature stabilization at about 18 DEG C.When external world's temperature in summer When degree is higher than 18 DEG C, this lunch box is placed in refrigerator frost meeting, makes phase change heat storage material become solid, allow it can absorb energy i.e. Can be used for being automatically adjusted the temperature of lunch box.
In sum, before this lunch box uses, it is ensured that lunch box first heats recuperation layer 106 and second and heats recuperation layer Na in 2042HPO4.12H2Positive 16 carbon paraffin in O crystal and refrigeration recuperation layer are solid forms, in order to in lunch box Food is lowered the temperature, and the former can be used for allowing food temperature be down to 40 DEG C, and the latter can be used for allowing food temperature be down to 18 DEG C.
The mode of heating of above-mentioned heat accumulating type incubation canteen is simple, rocks lunch box up and down and can heat food, rocks The Na that aqueous water in lunch box bamboo fibre generates after flowing into dehydration due to effect of inertia2HPO4In recombine generation Na2HPO4.12H2O crystal releases heat, it is ensured that even if lunch box temperature after cooling is the lowest, make people at cuisines to be tasted Time phase change heat storage material also can provide heat for food, finally make the temperature of food reach 40 DEG C, allow the nutritional labeling in food Preferably it is absorbed by the body.
This heat accumulating type incubation canteen both may be used for cooling protection food and exempted from the amount reproduction of microorganism and the food that causes Thing goes bad, and prevents the harm that food spoilage is brought, can effectively heat food when people eat food again, Allow people the nutritional labeling in food preferably be absorbed, improve the life health level of people.And mode of heating is easy, Not electricity consumption, need not be fiery, only need to shake, energy-conserving and environment-protective.
Embodiment described above is only the preferred embodiment lifted by absolutely proving the present invention, and its protection domain does not limits In this.The equivalent that those skilled in the art are made on the basis of the present invention substitutes or conversion, all in the protection of the present invention Within the scope of, protection scope of the present invention is as the criterion with claims.

Claims (8)

1. a cooling and warming incubation canteen, including box body and lid, it is characterised in that described box body and described lid wrap respectively Including vacuum-rustless steel outer layer and rustless steel internal layer, the vacuum of described box body-rustless steel outer layer and described rustless steel internal layer are at top Edge engages, has the first mezzanine space (103) between the vacuum-rustless steel outer layer of described box body and described rustless steel internal layer, There is between the vacuum of described lid-rustless steel outer layer and described rustless steel internal layer the second mezzanine space (203)；
The first mezzanine space (103) being positioned at described box body base section is sequentially provided with the first water storage material layer from the bottom to top (108), first heat recuperation layer (106) and the second water storage material layer (107), be positioned at the first interlayer of described box side wall part Refrigeration recuperation layer (105) it is provided with in space (103)；The 3rd storage it is sequentially provided with from the bottom to top in described second mezzanine space (203) Water material layer (206), second heat recuperation layer (204) and the 4th water storage material layer (205)；
Being filled with the first phase change heat storage material in described refrigeration recuperation layer (105), described first phase change heat storage material is organic storage Hot material；Described first heats recuperation layer (106) and described second heats in recuperation layer (204) and is all filled with the second phase-transition heat-storage Material, described second phase change heat storage material is hydrous salt phase transition heat-storing material；
Described box body and described lid are sealed by locking device and cover.
Cooling and warming incubation canteen the most according to claim 1, it is characterised in that described first phase change heat storage material is just The 16 organic heat-storing materials of carbon paraffin, the main component of described second phase change heat storage material is Na2HPO4.12H2O crystal.
Cooling and warming incubation canteen the most according to claim 2, it is characterised in that described second phase change heat storage material is by matter The Na of amount accounting 94-97%2HPO4.12H2O crystal, the anti-phase separation agent of 1-2% and 2-4% are anti-crosses cryogen composition.
Cooling and warming incubation canteen the most according to claim 3, it is characterised in that described anti-phase separation agent is that carboxymethyl is fine Dimension element, described anti-cryogen excessively is the mixture of boric acid and the Borax mixed according to mass ratio 1:1.
Cooling and warming incubation canteen the most according to claim 1, it is characterised in that described first water storage material layer (108), Described second water storage material layer (107), described 3rd water storage material layer (206) and described 4th water storage material layer (205) are equal It is made up of bamboo fibre.
Cooling and warming incubation canteen the most according to claim 1, it is characterised in that be additionally provided with at least one in described box body The separation steel plate (104) of hollow, is separated into described box body at least two and contains district, be filled with in described separation steel plate (104) Third phase change heat storage material, described third phase change heat storage material and the first phase change heat storage material material are identical.
Cooling and warming incubation canteen the most according to claim 1, it is characterised in that described locking device includes multiple passing through Pivot is rotatably connected at the snap close (302) at described lid edge, and is fixedly connected on the multiple buttons on described box body outer wall Plate (301), described snap close (302) fastens with described buckle (301) one_to_one corresponding.
Cooling and warming incubation canteen the most according to claim 7, it is characterised in that described snap close (302) and described buckle (301) quantity is respectively 4-6.
CN201610599448.9A 2016-07-27 2016-07-27 A kind of cooling and warming incubation canteen Expired - Fee Related CN106307920B (en)

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CN107198458A (en) * 2017-06-26 2017-09-26 张绍乙 Self-heating/cooling and phase transformation store device and its application method that insulation is combined
CN107902199A (en) * 2017-10-25 2018-04-13 徐靓琳 A kind of food delivery incubator
CN109349935A (en) * 2018-11-02 2019-02-19 荆门它山之石电子科技有限公司 A kind of barbecue grill
CN110653836A (en) * 2019-10-31 2020-01-07 西南交通大学 Intelligent food delivery robot combined with food heat preservation system and delivery method

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CN107198458A (en) * 2017-06-26 2017-09-26 张绍乙 Self-heating/cooling and phase transformation store device and its application method that insulation is combined
CN107902199A (en) * 2017-10-25 2018-04-13 徐靓琳 A kind of food delivery incubator
CN109349935A (en) * 2018-11-02 2019-02-19 荆门它山之石电子科技有限公司 A kind of barbecue grill
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CN110653836A (en) * 2019-10-31 2020-01-07 西南交通大学 Intelligent food delivery robot combined with food heat preservation system and delivery method

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