CN210035990U - Semiconductor refrigeration storage box capable of controlling cold quantity and air quantity for cold chain transportation - Google Patents
Semiconductor refrigeration storage box capable of controlling cold quantity and air quantity for cold chain transportation Download PDFInfo
- Publication number
- CN210035990U CN210035990U CN201920552653.9U CN201920552653U CN210035990U CN 210035990 U CN210035990 U CN 210035990U CN 201920552653 U CN201920552653 U CN 201920552653U CN 210035990 U CN210035990 U CN 210035990U
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- semiconductor refrigeration
- cold
- semiconductor
- storage box
- button switch
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 150
- 238000005057 refrigeration Methods 0.000 title claims abstract description 131
- 238000003860 storage Methods 0.000 title claims abstract description 48
- 239000000463 material Substances 0.000 claims description 25
- 239000012774 insulation material Substances 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 6
- 239000010960 cold rolled steel Substances 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 7
- 230000017525 heat dissipation Effects 0.000 abstract description 7
- 238000009826 distribution Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 235000013305 food Nutrition 0.000 description 21
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- 235000013361 beverage Nutrition 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 235000013622 meat product Nutrition 0.000 description 1
- 235000014102 seafood Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Devices That Are Associated With Refrigeration Equipment (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
The utility model discloses a semiconductor refrigeration storage box with controllable cold quantity and air quantity for cold chain transportation, which comprises a heat-insulating storage box body, wherein a refrigeration box cover is arranged at the top of the box body, an automatic control semiconductor refrigeration module is arranged on the refrigeration box cover, the semiconductor refrigeration module comprises a semiconductor refrigeration piece, the semiconductor refrigeration piece comprises a heat dissipation surface and a refrigeration surface, the heat dissipation surface faces upwards and is attached to a heat dissipation fin, and the heat dissipation fin is attached to a heat dissipation fan to exchange heat between heat at a hot end and outside air; the refrigerating surface is downward and is jointed with the cold guide fan. The semiconductor refrigeration storage box is characterized in that the number of the semiconductor refrigeration pieces which are started and stopped is automatically controlled by the laser sensor, the air speed of the cooling fan is manually controlled by clicking a button, the semiconductor refrigeration efficiency can be effectively improved, and the system is simple in structure and suitable for cold chain transportation and distribution processes.
Description
Technical Field
The utility model relates to a semiconductor refrigeration hutch of controllable cold volume and amount of wind for cold chain transportation belongs to the cold-stored field of cold chain.
Background
With the development of the logistics industry, the variety of logistics goods is more diversified, and the fresh goods distribution becomes one of the main business of Taobao, Jingdong and the like at present. The semiconductor refrigeration technology is applied to the refrigeration box, so that the volume and the weight of the refrigeration box can be reduced, the cost is saved, and the reliability and the convenience in the transportation process are improved. If can open the semiconductor refrigeration piece of appropriate quantity according to eating material type and volume in the box, and effectively adjust cold junction cooling fan wind speed, can improve semiconductor refrigeration efficiency.
There have been some patents that apply semiconductor refrigeration to the field of refrigeration cases. Patent CN208282444U "low temperature refrigeration delivery case based on semiconductor refrigeration piece" utilizes semiconductor refrigeration, adopts the temperature control board that even has the step-down transformer to control the semiconductor refrigeration temperature, and the temperature control scope is limited, can't obtain optimum refrigeration temperature according to the interior actual conditions feedback of box. Patent 107763924A semiconductor refrigeration distribution box utilizes semiconductor refrigeration piece to refrigerate, and the semiconductor refrigeration piece hot junction adopts the water-cooling mode. When water cooling is adopted for heat dissipation, the semiconductor cannot be refrigerated for a long time, so that the semiconductor is not suitable for long-distance cold chain distribution. Meanwhile, the system needs to be provided with a cooling water tank, so that the volume of the refrigeration tank is increased.
The utility model relates to a semiconductor refrigeration storage box with controllable cold quantity and air quantity for cold chain transportation, a refrigeration device has no complex equipment and pipelines, and the volume and the manufacturing cost of a refrigeration box body can be effectively reduced; the laser sensor is used in the semiconductor refrigeration storage box to automatically control the number of the semiconductor refrigeration pieces for starting and stopping, and the air speed of the cooling fan is manually controlled according to the type of food materials, so that the semiconductor refrigeration efficiency and the operation time of the box body can be effectively improved. The utility model discloses can provide new thinking and scheme for the manufacturing and designing of cold chain transportation field refrigeration case.
Disclosure of Invention
An object of the utility model is to overcome the not enough of prior art existence, provide a semiconductor refrigeration hutch of controllable cold volume and amount of wind for cold chain transportation.
The utility model provides a pair of a semiconductor refrigeration hutch of controllable cold volume and amount of wind for cold chain transportation, its characterized in that includes first laser sensor (1-1), second laser sensor (1-2), insulation material (2), lead cold material (3), power (4), button switch (5), first button switch (5-1), second button switch (5-2), third button switch (5-3), fourth button switch (5-4), first semiconductor refrigeration piece (6-1), second semiconductor refrigeration piece (6-2), third semiconductor refrigeration piece (6-3), hot junction fan (7), grid (8), radiating fin (9), refrigeration case lid (10), insulating layer (11), cold junction fan (12), hutch (13), An ammeter (14) and a voltage regulator (15);
wherein, one third of the left side of the storage box (13) is provided with a first laser sensor (1-1), two thirds of the left side of the storage box (13) is provided with a second laser sensor (1-2), the top of the storage box (13) is provided with a refrigeration box cover (10), the center of the refrigeration box cover (10) is provided with a first semiconductor refrigeration sheet (6-1), a second semiconductor refrigeration sheet (6-2), a third semiconductor refrigeration sheet (6-3) and a layer of heat insulation layer (11), wherein, the first semiconductor refrigeration sheet (6-1), the second semiconductor refrigeration sheet (6-2) and the third semiconductor refrigeration sheet (6-3) are distributed at the center of the refrigeration box cover (10) at equal intervals, the heat insulation layer (11) is positioned in the interval, the refrigeration box cover (10) is divided into an upper part and a lower part, and the first semiconductor refrigeration sheet (6-1) is arranged, The cold ends of the second semiconductor refrigerating sheet (6-2) and the third semiconductor refrigerating sheet (6-3) face the lower side, the hot ends face the upper side, and the top surface of the refrigerating box cover (10) is provided with a grating (8);
the cold ends of the first semiconductor refrigeration piece (6-1), the second semiconductor refrigeration piece (6-2) and the third semiconductor refrigeration piece (6-3) are not in direct contact with the interior of the box body, and the cold ends of the first semiconductor refrigeration piece (6-1), the second semiconductor refrigeration piece (6-2) and the third semiconductor refrigeration piece (6-3) are connected with a cold end fan (12); the hot ends of the first semiconductor refrigerating sheet (6-1), the second semiconductor refrigerating sheet (6-2) and the third semiconductor refrigerating sheet (6-3) are connected with one end of the radiating fin (9), and a hot end fan (7) is attached to the other end of the radiating fin (9); a power supply (4) is arranged on the left side of the radiating fin (9), and a button switch (5) is arranged on the left side of the grille (8); the first end of the power supply (4) is connected with the first end of a fourth button switch (5-4), the second end of the fourth button switch (5-4) is respectively connected with the first end of a hot-end fan (7), the first end of a voltage regulator (15) and the first end of an ammeter (14), the second end of the ammeter (14) is connected with the first end of a cold-end fan (12), the second end of the cold-end fan (12) is respectively connected with the first end of a first button switch (5-1), the first end of a second button switch (5-2) and the first end of a third button switch (5-3), the second end of the first button switch (5-1), the second end of the second button switch (5-2), the second end of the third button switch (5-3), the second end of the hot-end fan (7) and the second end of the voltage regulator (15) are respectively connected with the second end of the power supply (4).
The utility model provides a pair of a semiconductor refrigeration hutch for controllable cold volume of cold chain transportation and amount of wind, its characterized in that includes following working process:
food materials are filled in the storage box (13), when the height of the food materials exceeds two thirds of the height of the storage box (13), the second laser sensor (1-2) senses the food materials, the first semiconductor refrigeration piece (6-1), the second semiconductor refrigeration piece (6-2) and the third semiconductor refrigeration piece (6-3) are in a working state, cold ends of the first semiconductor refrigeration piece (6-1), the second semiconductor refrigeration piece (6-2) and the third semiconductor refrigeration piece (6-3) generate cold energy, and the cold end fan (12) is started to transmit the cold energy into the storage box (13); the hot ends of the first semiconductor refrigerating piece (6-1), the second semiconductor refrigerating piece (6-2) and the third semiconductor refrigerating piece (6-3) generate heat, a hot end fan (7) is started, air outside the box is led in to exchange heat with the radiating fin (9), and the heat generated by the hot ends of the first semiconductor refrigerating piece (6-1), the second semiconductor refrigerating piece (6-2) and the third semiconductor refrigerating piece (6-3) is taken away; when the height of the food material exceeds one third of the height of the storage box (13) and does not exceed two thirds of the height, the first laser sensor (1-1) senses the food material, the second laser sensor (1-2) does not sense the food material, the second semiconductor refrigeration piece (6-2) is in an inoperative state, the first semiconductor refrigeration piece (6-1) and the third semiconductor refrigeration piece (6-3) are in an operative state, cold ends of the first semiconductor refrigeration piece (6-1) and the third semiconductor refrigeration piece (6-3) generate cold energy, and the cold end fan (12) is started to transmit the cold energy into the storage box (13); the hot ends of the first semiconductor refrigerating piece (6-1) and the third semiconductor refrigerating piece (6-3) generate heat, a hot end fan (7) is started, air outside the box is introduced to exchange heat with the radiating fins (9), and the heat generated by the hot ends of the first semiconductor refrigerating piece (6-1) and the third semiconductor refrigerating piece (6-3) is taken away; when the height of the food material is not more than one third, the first laser sensor (1-1) and the second laser sensor (1-2) do not sense the food material, the first semiconductor refrigeration piece (6-1) and the third semiconductor refrigeration piece (6-3) are in an out-of-operation state, the second semiconductor refrigeration piece (6-2) is in an operating state, the cold end of the second semiconductor refrigeration piece (6-2) generates cold, and the cold end fan (12) is started to transmit the cold energy into the storage box (13); the hot end of the second semiconductor refrigerating sheet (6-2) generates heat, a hot end fan (7) is started, and air outside the box is introduced to exchange heat with the radiating fins (9) so as to take away the heat generated by the hot end of the second semiconductor refrigerating sheet (6-2).
The power supply (4) is a voltage-adjustable direct-current power supply and supplies electric energy to the first semiconductor refrigeration piece (6-1), the second semiconductor refrigeration piece (6-2), the third semiconductor refrigeration piece (6-3), the hot-end fan (7) and the cold-end fan (12); when food materials such as vegetables are filled in the storage box (13), the button switch (5-1) is closed, and the cold end fan (12) runs at a high wind speed state; when the food materials are meat products, the button switch (5-2) is closed, and the cold end fan (12) runs in a medium wind speed state; when food materials are fruit drinks are filled in the storage box (13), the button switch (5-3) is closed, and the cold end fan (12) is in a low wind speed state; when the food is not loaded in the storage box (13), the button switch (5-4) is turned off, and the power supply (4) is turned off.
Cold conducting materials (3) are arranged around the storage box (13), and cold energy of cold ends of the first semiconductor refrigeration piece (6-1), the second semiconductor refrigeration piece (6-2) and the third semiconductor refrigeration piece (6-3) can be effectively transmitted into the storage box (13).
The periphery of the storage box (13) is provided with a heat insulation material (2), the heat insulation material (2) can be polyurethane or other heat insulation materials, and the box body material can be a cold-rolled steel plate.
Drawings
FIG. 1 is a schematic plan view of a semiconductor refrigeration storage container with controlled cooling capacity and air volume for cold chain transportation;
reference number designations in the drawings: 1-1, a first laser sensor, 1-2, a second laser sensor, 2, a heat insulation material, 3, a cold guide material, 4, a power supply, 5-1, a first button switch, 5-2, a second button switch, 5-3, a third button switch, 5-4, a fourth button switch, 6-1, a first semiconductor refrigeration sheet, 6-2, a second semiconductor refrigeration sheet, 6-3, a third semiconductor refrigeration sheet, 7, a hot end fan, 8, a grid, 9, a heat dissipation fin, 10, a refrigeration box cover, 11, a heat insulation layer, 12, a cold end fan, 13 and a storage box.
FIG. 2 is a schematic diagram of the circuit control of a semiconductor refrigeration storage box with controlled cooling capacity and air volume for cold chain transportation;
reference number designations in the drawings: 4. the fan comprises a power supply, 5-1 parts of a first button switch, 5-2 parts of a second button switch, 5-3 parts of a third button switch, 5-4 parts of a fourth button switch, 7 parts of a hot-end fan, 12 parts of a cold-end fan, 14 parts of an ammeter, 15 parts of a voltage regulator.
FIG. 3 is a schematic plan view of a refrigerator lid of a controlled capacity and capacity semiconductor refrigeration container for cold chain transportation;
reference number designations in the drawings: 2. the device comprises a heat insulation material 3, a cold conduction material 4, a power supply 5, a button switch 7, a hot end fan 9, a radiating fin 14, an ammeter 15 and a voltage regulator.
Fig. 4 is a flow chart of the operation of the semiconductor refrigeration storage box with controllable cold quantity and air quantity for cold chain transportation.
Detailed Description
Fig. 1 is a schematic view of the overall structure of a semiconductor refrigeration storage box with controllable cold quantity and air quantity for cold chain transportation, and the specific implementation mode of the refrigeration storage box is as follows:
the power supply 4 is a voltage-adjustable direct-current power supply and supplies electric energy to the first semiconductor refrigerating sheet 6-1, the second semiconductor refrigerating sheet 6-2, the third semiconductor refrigerating sheet 6-3, the hot-end fan 7 and the cold-end fan 12. When vegetables need to be refrigerated in the storage box 13, the button switch 5-1 is closed, and the cold-end fan 12 runs at a high wind speed; when fresh meat and seafood need to be frozen in the storage box 13, the button switch 5-2 is closed, and the cold end fan 12 is in a medium wind speed state; when the fruit and beverage needs to be refrigerated in the storage box 13, the button switch 5-3 is closed, and the cold-end fan 12 is in a low-wind-speed state.
When the height of the food material in the storage box 13 exceeds two thirds of the height of the storage box 13, the second laser sensor 1-2 senses the food material at the moment, the first semiconductor refrigeration piece 6-1, the second semiconductor refrigeration piece 6-2 and the third semiconductor refrigeration piece 6-3 are in a working state, cold ends of the first semiconductor refrigeration piece 6-1, the second semiconductor refrigeration piece 6-2 and the third semiconductor refrigeration piece 6-3 generate cold energy, and the cold end fan 12 is started to transmit the cold energy into the storage box 13; the hot ends of the first semiconductor refrigerating piece 6-1, the second semiconductor refrigerating piece 6-2 and the third semiconductor refrigerating piece 6-3 generate heat, a hot end fan 7 is started, and air outside the box is introduced to exchange heat with the radiating fins 9 so as to take away the heat generated by the hot ends of the first semiconductor refrigerating piece 6-1, the second semiconductor refrigerating piece 6-2 and the third semiconductor refrigerating piece 6-3; when the height of the food material exceeds one third of the height of the storage box 13 and does not exceed two thirds of the height, the first laser sensor 1-1 senses the food material, the second laser sensor 1-2 does not sense the food material, the second semiconductor refrigeration piece 6-2 is in an inoperative state, the first semiconductor refrigeration piece 6-1 and the third semiconductor refrigeration piece 6-3 are in an operative state, cold ends of the first semiconductor refrigeration piece 6-1 and the third semiconductor refrigeration piece 6-3 generate cold energy, and the cold end fan 12 is started to transmit the cold energy into the storage box 13; the hot ends of the first semiconductor refrigerating sheet 6-1 and the third semiconductor refrigerating sheet 6-3 generate heat, a hot end fan 7 is started, and air outside the box is introduced to exchange heat with the radiating fins 9 so as to take away the heat generated by the hot ends of the first semiconductor refrigerating sheet 6-1 and the third semiconductor refrigerating sheet 6-3; when the height of the food material is not more than one third, the first laser sensor 1-1 and the second laser sensor 1-2 do not sense the food material at the moment, the first semiconductor refrigerating sheet 6-1 and the third semiconductor refrigerating sheet 6-3 are in an inoperative state, the second semiconductor refrigerating sheet 6-2 is in an operative state, the cold end of the second semiconductor refrigerating sheet 6-2 generates cold, and the cold end fan 12 is started to transmit the cold into the storage box 13; the hot end of the second semiconductor refrigerating sheet 6-2 generates heat, the hot end fan 7 is started, and air outside the box is introduced to exchange heat with the radiating fins 9 so as to take away the heat generated by the hot end of the second semiconductor refrigerating sheet 6-2.
When the food is not loaded in the storage box 13, the button switch 5-4 is turned off, and the power supply 4 is turned off.
Claims (4)
1. A semiconductor refrigeration storage box capable of controlling cold quantity and air quantity for cold chain transportation is characterized by comprising a first laser sensor (1-1), a second laser sensor (1-2), a heat insulation material (2), a cold guide material (3), a power supply (4), a button switch (5), a first button switch (5-1), a second button switch (5-2), a third button switch (5-3), a fourth button switch (5-4), a first semiconductor refrigeration sheet (6-1), a second semiconductor refrigeration sheet (6-2), a third semiconductor refrigeration sheet (6-3), a hot end fan (7), a grid (8), a radiating fin (9), a refrigeration box cover (10), a heat insulation layer (11), a cold end fan (12), a storage box (13), an ammeter (14), A voltage regulator (15);
wherein, one third of the left side of the storage box (13) is provided with a first laser sensor (1-1), two thirds of the left side of the storage box (13) is provided with a second laser sensor (1-2), the top of the storage box (13) is provided with a refrigeration box cover (10), the center of the refrigeration box cover (10) is provided with a first semiconductor refrigeration sheet (6-1), a second semiconductor refrigeration sheet (6-2), a third semiconductor refrigeration sheet (6-3) and a layer of heat insulation layer (11), wherein, the first semiconductor refrigeration sheet (6-1), the second semiconductor refrigeration sheet (6-2) and the third semiconductor refrigeration sheet (6-3) are distributed at the center of the refrigeration box cover (10) at equal intervals, the heat insulation layer (11) is positioned in the interval, the refrigeration box cover (10) is divided into an upper part and a lower part, and the first semiconductor refrigeration sheet (6-1) is arranged, The cold ends of the second semiconductor refrigerating sheet (6-2) and the third semiconductor refrigerating sheet (6-3) face the lower side, the hot ends face the upper side, and the top surface of the refrigerating box cover (10) is provided with a grating (8);
the cold ends of the first semiconductor refrigeration piece (6-1), the second semiconductor refrigeration piece (6-2) and the third semiconductor refrigeration piece (6-3) are not in direct contact with the interior of the box body, and the cold ends of the first semiconductor refrigeration piece (6-1), the second semiconductor refrigeration piece (6-2) and the third semiconductor refrigeration piece (6-3) are connected with a cold end fan (12); the hot ends of the first semiconductor refrigerating sheet (6-1), the second semiconductor refrigerating sheet (6-2) and the third semiconductor refrigerating sheet (6-3) are connected with one end of the radiating fin (9), and a hot end fan (7) is attached to the other end of the radiating fin (9); a power supply (4) is arranged on the left side of the radiating fin (9), and a button switch (5) is arranged on the left side of the grille (8); the first end of the power supply (4) is connected with the first end of a fourth button switch (5-4), the second end of the fourth button switch (5-4) is respectively connected with the first end of a hot-end fan (7), the first end of a voltage regulator (15) and the first end of an ammeter (14), the second end of the ammeter (14) is connected with the first end of a cold-end fan (12), the second end of the cold-end fan (12) is respectively connected with the first end of a first button switch (5-1), the first end of a second button switch (5-2) and the first end of a third button switch (5-3), the second end of the first button switch (5-1), the second end of the second button switch (5-2), the second end of the third button switch (5-3), the second end of the hot-end fan (7) and the second end of the voltage regulator (15) are respectively connected with the second end of the power supply (4).
2. The semiconductor refrigeration storage box with controllable cold quantity and air quantity for cold chain transportation according to claim 1, characterized in that:
the power supply (4) is a voltage-adjustable direct-current power supply and supplies electric energy to the first semiconductor refrigeration piece (6-1), the second semiconductor refrigeration piece (6-2), the third semiconductor refrigeration piece (6-3), the hot-end fan (7) and the cold-end fan (12).
3. The semiconductor refrigeration storage box with controllable cold quantity and air quantity for cold chain transportation according to claim 1, characterized in that:
the cold conducting material (3) is arranged around the storage box (13).
4. The semiconductor refrigeration storage box with controllable cold quantity and air quantity for cold chain transportation according to claim 1, characterized in that:
the periphery of the storage box (13) is provided with a heat insulation material (2), the heat insulation material (2) is polyurethane, and the box body is made of cold-rolled steel plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920552653.9U CN210035990U (en) | 2019-04-22 | 2019-04-22 | Semiconductor refrigeration storage box capable of controlling cold quantity and air quantity for cold chain transportation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920552653.9U CN210035990U (en) | 2019-04-22 | 2019-04-22 | Semiconductor refrigeration storage box capable of controlling cold quantity and air quantity for cold chain transportation |
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| Publication Number | Publication Date |
|---|---|
| CN210035990U true CN210035990U (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920552653.9U Expired - Fee Related CN210035990U (en) | 2019-04-22 | 2019-04-22 | Semiconductor refrigeration storage box capable of controlling cold quantity and air quantity for cold chain transportation |
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| Country | Link |
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| CN (1) | CN210035990U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945581A (en) * | 2019-04-22 | 2019-06-28 | 南京工业大学 | It is a kind of for the controllable refrigerating capacity of cold chain transportation and the semiconductor refrigerating hutch of air quantity |
-
2019
- 2019-04-22 CN CN201920552653.9U patent/CN210035990U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945581A (en) * | 2019-04-22 | 2019-06-28 | 南京工业大学 | It is a kind of for the controllable refrigerating capacity of cold chain transportation and the semiconductor refrigerating hutch of air quantity |
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| GR01 | Patent grant | ||
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Granted publication date: 20200207 |