CN103954089A - Passive car refrigerator - Google Patents
Passive car refrigerator Download PDFInfo
- Publication number
- CN103954089A CN103954089A CN201410209432.3A CN201410209432A CN103954089A CN 103954089 A CN103954089 A CN 103954089A CN 201410209432 A CN201410209432 A CN 201410209432A CN 103954089 A CN103954089 A CN 103954089A
- Authority
- CN
- China
- Prior art keywords
- polyurethane foam
- hard polyurethane
- car refrigerator
- wall layer
- passive type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920005830 Polyurethane Foam Polymers 0.000 claims abstract description 34
- 239000011496 polyurethane foam Substances 0.000 claims abstract description 34
- 238000009413 insulation Methods 0.000 claims abstract description 15
- 238000005057 refrigeration Methods 0.000 claims abstract description 8
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 33
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 claims description 22
- 239000000203 mixture Substances 0.000 claims description 21
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 11
- RGSFGYAAUTVSQA-UHFFFAOYSA-N pentamethylene Natural products C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 claims description 11
- 125000004817 pentamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 claims description 11
- 229920005573 silicon-containing polymer Polymers 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- LNDKRVOOYMEYTC-UHFFFAOYSA-N buta-1,3-dien-1-ol Chemical compound OC=CC=C LNDKRVOOYMEYTC-UHFFFAOYSA-N 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 235000011089 carbon dioxide Nutrition 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 239000003507 refrigerant Substances 0.000 abstract description 3
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 abstract 4
- 239000012792 core layer Substances 0.000 abstract 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 abstract 1
- 230000008016 vaporization Effects 0.000 abstract 1
- 238000009834 vaporization Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229960005486 vaccine Drugs 0.000 description 1
- 210000003934 vacuole Anatomy 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Polyurethanes Or Polyureas (AREA)
- Refrigerator Housings (AREA)
- Thermal Insulation (AREA)
Abstract
The invention relates to a passive car refrigerator, which comprises a heat insulation box body and refrigerants contained in the heat insulation box body, wherein the heat insulation box body consists of a plurality of wall parts, each wall part comprises an outer wall layer, an inner wall layer and a vacuum heat insulation plate core layer, in addition, a hard polyurethane foam body is filled between each outer wall layer and the corresponding inner wall layer, in addition, the vacuum heat insulation plate core layers are cladded inside the hard polyurethane foam bodies, the integral density of each hard polyurethane foam body is 35 to 40Kg/m<3>, the compression intensity is 0.10 to 0.15MPa, and the dimension change rate is not higher than 1.0 percent when each hard polyurethane foam body is placed in the air at a temperature between -20 DEG C and 50 DEG C for 24 hours. The passive car refrigerator provided by the invention has the advantages that a direct refrigeration mode of refrigerant vaporization heat absorption and diffusion to the box body is adopted, and a power supply system for supplying power to an electric compressor is not needed, so the capacity rate of the whole car refrigerator can be obviously improved, and the transportation cost is obviously reduced.
Description
Technical field
The present invention relates to the technical field of Refrigerated Transport, more particularly, the present invention relates to a kind of passive type car refrigerator.
Background technology
Refrigerating transporting apparatus refers to that itself can maintain certain low temperature environment, and facility and the device of energy transfer of cryogenic kinds of goods; And refrigerator is last link in cold chain.Refrigerated Transport should have good cold insulation, ventilation equipment; Casing should have good heat-proof quality, should have certain ventilation device, capable of washing; Should have that load-bearing is large, dischargeable capacity is large, from the feature of heavy and light, and there is good applicability.Need the article of Refrigerated Transport to mainly contain fresh vegetables, fruit, outside the food such as aquatic products, conventionally also comprise the less article of the scale of construction such as medicine, vaccine and electronic component.In prior art, Refrigerated Transport adopts the van container freezing with motor compressor conventionally, i.e. common described active refrigerated transport case; This container is economically viable for the REFC of amount transport one species, if but such as accurate electronic component or medicine etc. of goods that is less than a whole container for transportation adopts active refrigerated transport case transportation, the electric energy of the normal work of the motor compressor of need to giving security in transportation has especially increased cost of transportation in transportation small article or the transportation that requires the article of different refrigerated storage temperatures to load in mixture.
Summary of the invention
In order to solve above-mentioned technical problem of the prior art, the object of the present invention is to provide a kind of passive type car refrigerator.
In order to solve the described technical problem of invention and to realize goal of the invention, the present invention has adopted following technical scheme:
A passive type car refrigerator, comprises body of thermal insulating box and is arranged on the cold-producing medium in body of thermal insulating box; It is characterized in that: described body of thermal insulating box consists of a plurality of wall portion that forms described refrigerator main body, described wall portion comprises outer wall layer and inner wall layer, and be arranged on the vacuum heat-insulating plate sandwich layer between described outer wall layer and described inner wall layer, and outer wall layer and described inner wall layer certain distance described in described vacuum heat-insulating plate sandwich layer interval; Between described outer wall layer and described inner wall layer, fill hard polyurethane foam; And described hard polyurethane foam is coated within it by described vacuum heat-insulating plate sandwich layer; The global density of described hard polyurethane foam is 35～40Kg/m
3, compressive strength is 0.10～0.15MPa, in air, in temperature between-20 ℃ and 50 ℃, places size changing rate after 24 hours not higher than 1.0%.
Wherein, described agent for storage of coldness is liquid, be preferably dry ice, liquid carbon dioxide or liquid nitrogen, and described agent for storage of coldness is stored in pressure steel cylinder.
Wherein, on described agent for storage of coldness steel cylinder, be also provided with flow controller.
Wherein, in described insulation box, be also provided with the refrigeration piping spiraling; And described refrigeration piping is connected with the flow controller on described agent for storage of coldness steel cylinder by expander.
Wherein, on described insulation box, be also provided with for discharging the pressure relief device of the gas in described body of thermal insulating box.
Wherein, described the first hard polyurethane foam and the second hard polyurethane foam be by the vulcabond of 20.5～25.0wt%, the PEBA-1000 of the PEA-1000 of 15.0～18.0wt%, 5.0～7.5wt%, the polyvinylamine resin of the end hydroxy butadiene of 2.0～2.5wt%, 2.5～3.5wt%, the dimethyl silicone polymer of 1.5～1.8wt%, the pentamethylene of the triethylenediamine of 0.20～0.25wt%, 12.0～15.0wt%, the composition of the ethyl acetate of the water of 0.8～1.5wt% and surplus mix cast obtains.
Wherein, described vulcabond is liquefied mdi, for example Carbodiimide-Modified MDI.
Wherein, the thickness of described vacuum insulation flaggy is 10～20mm, and the maximum ga(u)ge of described hard polyurethane foam is 25～50mm, and the maximum ga(u)ge of described hard polyurethane foam is the more than 2 times of vacuum heat-insulating plate layer thickness.
Compare with immediate prior art, passive type car refrigerator of the present invention has following beneficial effect:
Passive type car refrigerator of the present invention adopts refrigerants vaporize absorb heat and be diffused into the direct refrigeration modes in casing, and refrigerating efficiency is high; And thereby the plot ratio that can significantly improve whole car refrigerator due to the electric power system without adopting supply motor compressor power is to be applicable to the transportation of variety classes or a small amount of article, compared with prior art, not only invest low, and for the transportation of a small amount of article or variety classes article, can significantly reduce cost of transportation.Passive type car refrigerator of the present invention has formed compound heat-insulation structure, can effectively prevent heat radiation, heat conduction and thermal convection current between box house and external environment.
Accompanying drawing explanation
Fig. 1 is the structural representation of the passive type car refrigerator described in embodiment 1.
The specific embodiment
Below with reference to specific embodiment, passive type car refrigerator of the present invention is further elaborated, to help those skilled in the art to have more complete, accurate and deep understanding to inventive concept of the present invention, technical scheme; In embodiment, the description of related structure, material and technique etc. is all exemplary, and does not refer to the restriction to invention protection domain.
Passive type car refrigerator of the present invention, comprises body of thermal insulating box and is arranged on the cold-producing medium in body of thermal insulating box; Described body of thermal insulating box consists of a plurality of wall portion that forms described refrigerator main body; And described wall portion comprises outer wall layer, vacuum heat-insulating plate and inner wall layer; As shown in Figure 1, the main box 10 of described passive type car refrigerator consists of roof 11, diapire 12, antetheca 13, rear wall 14, left wall 15 and right wall 16, and described left wall 15 be can folding structure; On described antetheca 13, also offer front side door 17.Described wall portion comprises outer wall layer and inner wall layer, and is arranged on the vacuum heat-insulating plate sandwich layer between described outer wall layer and described inner wall layer, and outer wall layer and described inner wall layer certain distance described in described vacuum heat-insulating plate sandwich layer interval; Between described outer wall layer and described inner wall layer, fill hard polyurethane foam; And described hard polyurethane foam is coated within it by described vacuum heat-insulating plate sandwich layer; The global density of described hard polyurethane foam is 35～40Kg/m
3, compressive strength is 0.10～0.15MPa, in air, in temperature between-20 ℃ and 50 ℃, places size changing rate after 24 hours not higher than 1.0%.As preferably, described agent for storage of coldness is liquid, such as dry ice, liquid carbon dioxide or liquid nitrogen etc., and described agent for storage of coldness is stored in pressure steel cylinder.On described agent for storage of coldness steel cylinder, be also provided with flow controller.In described insulation box, be also provided with the refrigeration piping spiraling; And described refrigeration piping is connected with the flow controller on described agent for storage of coldness steel cylinder by expander.The thickness of described vacuum insulation flaggy is 10～20mm, and the maximum ga(u)ge of described hard polyurethane foam is 25～50mm, and the maximum ga(u)ge of described hard polyurethane foam is the more than 2 times of vacuum heat-insulating plate layer thickness; And the volume of described refrigerator is more than 1000L.
The global density of described hard polyurethane foam is 35～40Kg/m
3, compressive strength is 0.10～0.15MPa, in air, in temperature between-20 ℃ and 50 ℃, places size changing rate after 24 hours not higher than 1.0%.Described hard polyurethane foam is the Carbodiimide-Modified MDI by 20.5～25.0wt%, the PEA-1000 of 15.0～18.0wt%, the PEBA-1000 of 5.0～7.5wt%, the end hydroxy butadiene of 2.0～2.5wt%, 2.5 the polyvinylamine resin of～3.5wt%, the dimethyl silicone polymer of 1.5～1.8wt%, the triethylenediamine of 0.20～0.25wt%, the pentamethylene of 12.0～15.0wt%, the composition of the water of 0.8～1.5wt% and the ethyl acetate of surplus mixes cast and obtains.
Embodiment 1
Hard polyurethane foam described in the present embodiment is by the PEA-1000 of Carbodiimide-Modified MDI, 18.0wt% of 22.0wt%, the polyvinylamine resin of the end hydroxy butadiene of the PEBA-1000 of 7.5wt%, 2.5wt%, 3.0wt% (molecular weight is 800), the dimethyl silicone polymer of 1.6wt%, the pentamethylene of the triethylenediamine of 0.20wt%, 12.0wt%, the composition of the ethyl acetate of the water of 1.2wt% and surplus mix cast obtains.
Embodiment 2
Hard polyurethane foam described in the present embodiment is by the PEA-1000 of Carbodiimide-Modified MDI, 18.0wt% of 22.0wt%, the polyvinylamine resin of the end hydroxy butadiene of the PEBA-1000 of 7.5wt%, 2.0wt%, 3.0wt%, the dimethyl silicone polymer of 1.6wt%, the pentamethylene of the triethylenediamine of 0.20wt%, 12.0wt%, the composition of the ethyl acetate of the water of 1.2wt% and surplus mix cast obtains.
Embodiment 3
Hard polyurethane foam described in the present embodiment is by the PEA-1000 of Carbodiimide-Modified MDI, 18.0wt% of 22.0wt%, the polyvinylamine resin of the end hydroxy butadiene of the PEBA-1000 of 7.5wt%, 2.5wt%, 3.0wt%, the dimethyl silicone polymer of 1.6wt%, the pentamethylene of the triethylenediamine of 0.20wt%, 12.0wt%, the composition of the ethyl acetate of the water of 0.8wt% and surplus mix cast obtains.
Embodiment 4
Hard polyurethane foam described in the present embodiment is by the PEA-1000 of Carbodiimide-Modified MDI, 18.0wt% of 22.0wt%, the polyvinylamine resin of the end hydroxy butadiene of the PEBA-1000 of 7.5wt%, 2.5wt%, 3.0wt%, the dimethyl silicone polymer of 1.6wt%, the pentamethylene of the triethylenediamine of 0.20wt%, 15.0wt%, the composition of the ethyl acetate of the water of 1.5wt% and surplus mix cast obtains.
Comparative example 1
Hard polyurethane foam described in this comparative example be by the PEA-1000 of Carbodiimide-Modified MDI, 18.0wt% of 22.0wt%, the end hydroxy butadiene of the PEBA-1000 of 7.5wt%, 2.5wt%, the triethylenediamine of the dimethyl silicone polymer of 1.6wt%, 0.20wt%, the composition of the water of the pentamethylene of 12.0wt%, 1.2wt% and the ethyl acetate of surplus mix cast obtain.
Comparative example 2
Hard polyurethane foam described in this comparative example is by the PEA-1000 of Carbodiimide-Modified MDI, 18.0wt% of 22.0wt%, the polyvinylamine resin of the PEBA-1000 of 7.5wt%, 3.0wt%, the dimethyl silicone polymer of 1.6wt%, the pentamethylene of the triethylenediamine of 0.20wt%, 12.0wt%, the composition of the ethyl acetate of the water of 1.2wt% and surplus mix cast obtains.
Comparative example 3
Hard polyurethane foam described in this comparative example is by the PEA-1000 of Carbodiimide-Modified MDI, 25.0wt% of 22.0wt%, the polyvinylamine resin of the end hydroxy butadiene of 2.5wt%, 3.0wt%, the dimethyl silicone polymer of 1.6wt%, the pentamethylene of the triethylenediamine of 0.20wt%, 12.0wt%, the composition of the ethyl acetate of the water of 1.2wt% and surplus mix cast obtains.
Comparative example 4
Hard polyurethane foam described in this comparative example is by the PEBA-1000 of Carbodiimide-Modified MDI, 25.0wt% of 22.0wt%, the polyvinylamine resin of the end hydroxy butadiene of 2.5wt%, 3.0wt%, the dimethyl silicone polymer of 1.6wt%, the pentamethylene of the triethylenediamine of 0.20wt%, 12.0wt%, the composition of the ethyl acetate of the water of 1.2wt% and surplus mix cast obtains.
Hard polyurethane foam performance test
From central part sampling, hard polyurethane fat vacuole foam its global density of bulk measurement with epidermal area that volume of sample is 100mm * 100mm * 25mm and thermal conductivity factor (adopt heat-flow meter method, mean temperature is 10 ℃); Take transfer rate 4mm/min as load, and the compression area of usining is removed the value of the load while being out of shape 10% as compressive strength; Low temperature size changing rate: the gauge rate of change while placing 24 hours at-20 ℃; Gauge rate of change while placing 24 hours at 50 ℃.The performance test results is as shown in table 1.
Table 1
For the ordinary skill in the art; specific embodiment is just exemplarily described the present invention by reference to the accompanying drawings; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (10)
1. a passive type car refrigerator, comprises body of thermal insulating box and is arranged on the cold-producing medium in body of thermal insulating box; It is characterized in that: described body of thermal insulating box consists of a plurality of wall portion that forms described refrigerator main body, described wall portion comprises outer wall layer and inner wall layer, and be arranged on the vacuum heat-insulating plate sandwich layer between described outer wall layer and described inner wall layer, and outer wall layer and described inner wall layer certain distance described in described vacuum heat-insulating plate sandwich layer interval; Between described outer wall layer and described inner wall layer, fill hard polyurethane foam; And described hard polyurethane foam is coated within it by described vacuum heat-insulating plate sandwich layer; The global density of described hard polyurethane foam is 35～40Kg/m
3, compressive strength is 0.10～0.15MPa, in air, in temperature between-20 ℃ and 50 ℃, places size changing rate after 24 hours not higher than 1.0%.
2. passive type car refrigerator according to claim 1, is characterized in that: described agent for storage of coldness is for liquid, and described agent for storage of coldness is stored in pressure steel cylinder.
3. passive type car refrigerator according to claim 2, is characterized in that: described agent for storage of coldness is dry ice, liquid carbon dioxide or liquid nitrogen.
4. passive type car refrigerator according to claim 2, is characterized in that: on described agent for storage of coldness steel cylinder, be also provided with flow controller.
5. passive type car refrigerator according to claim 4, is characterized in that: in described insulation box, be also provided with the refrigeration piping spiraling; And described refrigeration piping is connected with the flow controller on described agent for storage of coldness steel cylinder by expander.
6. passive type car refrigerator according to claim 1, is characterized in that: on described insulation box, be also provided with for discharging the pressure relief device of the gas in described body of thermal insulating box.
7. passive type car refrigerator according to claim 1, it is characterized in that: described the first hard polyurethane foam and the second hard polyurethane foam are the vulcabond by 20.5～25.0wt%, the PEA-1000 of 15.0～18.0wt%, the PEBA-1000 of 5.0～7.5wt%, the end hydroxy butadiene of 2.0～2.5wt%, the polyvinylamine resin of 2.5～3.5wt%, the dimethyl silicone polymer of 1.5～1.8wt%, the triethylenediamine of 0.20～0.25wt%, the pentamethylene of 12.0～15.0wt%, the composition of the water of 0.8～1.5wt% and the ethyl acetate of surplus mixes cast and obtains.
8. passive type car refrigerator according to claim 7, is characterized in that: described vulcabond is liquefied mdi.
9. passive type car refrigerator according to claim 7, is characterized in that: described vulcabond is Carbodiimide-Modified MDI.
10. passive type car refrigerator according to claim 1, it is characterized in that: the thickness of described vacuum insulation flaggy is 10～20mm, the maximum ga(u)ge of described hard polyurethane foam is 25～50mm, and the maximum ga(u)ge of described hard polyurethane foam is the more than 2 times of vacuum heat-insulating plate layer thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209432.3A CN103954089B (en) | 2014-05-16 | 2014-05-16 | Passive type car refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209432.3A CN103954089B (en) | 2014-05-16 | 2014-05-16 | Passive type car refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103954089A true CN103954089A (en) | 2014-07-30 |
| CN103954089B CN103954089B (en) | 2016-04-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410209432.3A Expired - Fee Related CN103954089B (en) | 2014-05-16 | 2014-05-16 | Passive type car refrigerator |
Country Status (1)
| Country | Link |
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| CN (1) | CN103954089B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2099942U (en) * | 1991-08-12 | 1992-03-25 | 曾涛 | Non-electricity refrigerator |
| CN2199157Y (en) * | 1994-07-07 | 1995-05-31 | 北京市雪龙制冷科技发展总公司 | Container for refrigerating and transporting liquid nitrogen |
| CN1298789A (en) * | 1999-10-29 | 2001-06-13 | 株式会社日立制作所 | Hard polyurethane foam, and refrigerator utilizing said foam |
| CN2505273Y (en) * | 2001-09-17 | 2002-08-14 | 王新疆 | Injection moulding structure of polyurethane thermal insulation material |
| CN1587874A (en) * | 2004-07-26 | 2005-03-02 | 王建华 | Composite vacuum heat insulating layer for refrigerator and freezer body |
| CN201653028U (en) * | 2009-12-01 | 2010-11-24 | 中国电子科技集团公司第十八研究所 | Portable thermoelectric temperature control box |
-
2014
- 2014-05-16 CN CN201410209432.3A patent/CN103954089B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2099942U (en) * | 1991-08-12 | 1992-03-25 | 曾涛 | Non-electricity refrigerator |
| CN2199157Y (en) * | 1994-07-07 | 1995-05-31 | 北京市雪龙制冷科技发展总公司 | Container for refrigerating and transporting liquid nitrogen |
| CN1298789A (en) * | 1999-10-29 | 2001-06-13 | 株式会社日立制作所 | Hard polyurethane foam, and refrigerator utilizing said foam |
| CN2505273Y (en) * | 2001-09-17 | 2002-08-14 | 王新疆 | Injection moulding structure of polyurethane thermal insulation material |
| CN1587874A (en) * | 2004-07-26 | 2005-03-02 | 王建华 | Composite vacuum heat insulating layer for refrigerator and freezer body |
| CN201653028U (en) * | 2009-12-01 | 2010-11-24 | 中国电子科技集团公司第十八研究所 | Portable thermoelectric temperature control box |
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| Publication number | Publication date |
|---|---|
| CN103954089B (en) | 2016-04-13 |
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Granted publication date: 20160413 |