CN205119603U - Vacuum freezing refrigerator that keeps fresh - Google Patents
Vacuum freezing refrigerator that keeps fresh Download PDFInfo
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- CN205119603U CN205119603U CN201520826781.XU CN201520826781U CN205119603U CN 205119603 U CN205119603 U CN 205119603U CN 201520826781 U CN201520826781 U CN 201520826781U CN 205119603 U CN205119603 U CN 205119603U
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Abstract
The utility model provides a vacuum freezing refrigerator that keeps fresh, it is main includes casing, refrigeration mechanism and evacuation mechanism, evacuation mechanism mainly includes vacuum pump, buffer, pressure sensor, automatically controlled valve, check valve and automatically controlled board. Respectively establish a hemisphere shell type gas -tight door on the freezing and fresh -keeping box side direction opening of hemisphere shell type, respectively be equipped with a plurality of reinforced rib plates on freezing box of the aforesaid and fresh -keeping box outer peripheral face, the freezing evaporimeter of refrigeration mechanism cheng surrounds the tube bank combination outside freezing box with fresh -keeping evaporimeter by the heat exchange tube group that a plurality of roots link to each other, and this tube bank combination is equipped with always to advance, the outlet pipe. The utility model discloses can be a lot of with the extension more lower than conventional low temperature of the retention time of food, can guarantee in addition that the quality of food can not take place great change and still keep fresh to practice thrift a large amount of electric energy sources, reduce use cost for the user.
Description
Technical field
The utility model relates to a kind of refrigerator.
Background technology
At present, domestic and international most of refrigerator is normal pressure refrigerator, although people update it, it is short that normal pressure refrigerator still also exists fresh keeping time, and the problem such as waste energy.
Summary of the invention
The purpose of this utility model be to provide a kind of freezing and chilled food can be made to obtain than conventional refrigerator high-quality protection again can the vacuum refrigeration fresh-keeping refrigerator of economize energy more.
The utility model mainly comprises: housing, refrigeration mechanism and vacuum device.Wherein, housing mainly comprises: shell, central dividing plate, freezer box, refrigerated cabinet, gas-tight door and touch intelligent control panel.Wherein, the central dividing plate being divided into upper and lower two chambers is provided with in the middle of Box-type enclosures, upper and lower two corresponding with upper and lower two chambers respectively round tube holes are established in the side of shell, reinforcing ring in hemisphere shell-type freezer box lateral openings on it in round tube hole and upper chamber is fixedly linked, and the reinforcing ring in the hemisphere shell-type antistaling box body lateral openings of its lower round tube hole and bottom chamber is fixedly linked.Above-mentioned freezer box and the external side face of antistaling box are respectively provided with the coupled some deep floors in one end, and the other end of this deep floor is then connected with shell or central dividing plate respectively.The opening of above-mentioned freezer box and fresh-keeping casing is respectively established one by hinged hemisphere shell-type gas-tight door, the casing at they and respective place forms spherical shell.The annular end limit of gas-tight door has in establishing the O type rubber seal of magnetic stripe, and it is corresponding with the groove set by the reinforcing ring on freezer box or fresh-keeping box opening.Gas-tight door annular end limit is also fixed with three uniform guides, a locking bar is had to pass in the through hole of each guide, the end top section that locking bar is adjacent with reinforcing ring is inclined-plane, the contact portion of locking bar and gas-tight door is rack shapes, the teeth of tooth bar are circular, the inner that this locking bar is positioned at gas-tight door center is placed in support member through the through hole of circular hollow support member sidewall, the locking bar being positioned at support member is provided with strip through-hole, the through hole of support member end face is passed in bolt one end through this strip through-hole, the other end passes the through hole of disk set by turning cylinder the inner.When twisting turning cylinder, the bolt be located on disk just drives locking bar to stretch thereupon, makes gas-tight door lock or open.Turning cylinder outer end reaches outside gas-tight door through gas-tight door central through hole, and end top is provided with rotation handwheel.Pressure cap is provided with between gas-tight door central through hole and turning cylinder, its one end is located at outside gas-tight door, the other end and the mechanical seal be located in gas-tight door are overlapped threaded one end and are connected, the mechanical seal on the rotating shaft of this cover is overlapped between the other end and turning cylinder and is provided with mechanical sealing member, the turning cylinder of side adjacent with mechanical sealing member is provided with the axle sleeve of locating is overlapped in mechanical seal, be provided with in this axle sleeve wall with axis being parallel run through through hole, be provided with screw in it, this screw is connected with the flute profile screw in mechanical seal jacket wall.Also be provided with intelligent control panel in the side shell upper being provided with gas-tight door, bottom is provided with thermovent.Separately in freezer box and fresh-keeping casing, be respectively equipped with article-displacing partition board and illuminating lamp, the dedicated sealing member other end that the wire be connected with illuminating lamp is each passed through on freezer box and fresh-keeping casing is located on electric-controlled plate.Dedicated sealing member described in the utility model has a cylinder, and the through hole of its periphery wall and place parts is connected, and both ends open lays respectively at through hole both sides, is provided with airtight and watertight padding through the object of cylinder chamber and cylinder.
Refrigeration mechanism mainly comprises: refrigerating evaporator, fresh-keeping evaporimeter, compressor, filter, condenser, electric-controlled plate, electrically-controlled valve, temperature sensor and compressed gas cylinder.Wherein, refrigerating evaporator is formed by some connected heat exchanger tubes and is enclosed in the pipe bundle combinations outside freezer box, this pipe bundle combinations is provided with total import and export pipe, its general import pipe is connected with capillary outlet, this capillary inlet pipe is connected with the coil pipe type filter outlet being located at enclosure, this filter inlet exports with coiler type condenser and is connected, and this condenser inlet is connected with compressor outlet, and this compressor is connected with compressed gas cylinder.Compressed gas cylinder is released Compressed Gas and is entered the gaseous refrigerant that compressor is converted into HTHP, liquid is become by the cooling of condenser, enter refrigerating evaporator again by carrying out throttling by capillary after metre filter again, the heat in absorption refrigerating case carries out freezing to the article stored in it.Cold-producing medium after heat absorption becomes steam state from liquid state, returns compressor circulate by return tube.The bottom of refrigerating evaporator is connected with return tube entrance point, and this return tube port of export is connected with compressor.Equally, fresh-keeping evaporimeter is also that some connected heat exchanger tubes form and are enclosed in the external pipe bundle combinations of antistaling box, this pipe bundle combinations is also provided with total import and export pipe, they are respectively connected with compressor return tube by an electrically-controlled valve, and general import pipe is close to return tube entrance point, general export pipe is close to the return tube port of export.Described electrically-controlled valve is connected with electric-controlled plate, and the refrigerating capacity needed because of antistaling box is few, and the refrigerating capacity of compressor supply antistaling box will soon be met, and under the manipulation of electric-controlled plate, electrically-controlled valve is closed, so compressor no longer provides refrigerating capacity to antistaling box.Above-mentioned compressor is connected with electric-controlled plate by automatic control switch.Separately in freezer box and refrigerated cabinet, respectively establish a temperature sensor, they are connected with electric-controlled plate respectively by wire, and wire is each passed through the dedicated sealing member be located on freezer box and fresh-keeping casing.This electric-controlled plate is established in the enclosure, touches switch be connected with the intelligent control panel be located on shell by door.
Vacuum device mainly comprises vavuum pump, dedicated sealing member, buffer, pressure sensor, electrically-controlled valve, check-valves and electric-controlled plate.Freezer box is respectively connected with vacuum line one end by a dedicated sealing member respectively with on fresh-keeping casing, and this vacuum line other end being provided with electrically-controlled valve is connected with air-inlet of vacuum pump, and this vavuum pump is connected with electric-controlled plate by automatic control switch.Best, the vacuum line near the dedicated sealing member of freezer box is provided with capillary type buffer, to reduce noise.Vacuum line in addition between freezer box and fresh-keeping casing is provided with a coupled vacuum tube, as the blowdown pipe opening gas-tight door, be provided with electrically-controlled valve in this vacuum tube end, the control cable of its electrically-controlled valve is connected with electric-controlled plate.When gas-tight door opened by needs, automatically terminate the normally off of electrically-controlled valve, make the air pressure in freezer box or refrigerated cabinet recover normal pressure, gas-tight door that is freezing or refrigerating box is opened; Electrically-controlled valve recovers normally off at closing time, and vavuum pump starts to vacuumize, and when reaching the negative pressure value of pressure sensor setting, stops vacuumizing.Separately in freezer box He in fresh-keeping casing, respectively establish a pressure sensor, they are connected with electric-controlled plate with the dedicated sealing member other end on fresh-keeping casing through freezer box respectively by wire.The electric-controlled plate of vacuum device and the electric-controlled plate of refrigeration mechanism are one block of plate, and it also touches switch by door and is connected with the intelligent control panel be located on shell.Above-mentioned electric-controlled plate is provided with the single-chip microcomputer be made up of some modules, and this single-chip microcomputer is connected with the various function buttons (button) on intelligent control panel.
The course of work of the present utility model is roughly as follows: be household freezer setting operating temperature (being generally-18 ~-24 DEG C), pressure (0.05 ~ 0.07Mpa) in advance; Antistaling box setting operating temperature (being generally-5 ~-5 DEG C), pressure (0.05 ~ 0.07Mpa); Start the refrigerator power switch on intelligent control panel, the single-chip microcomputer on electric-controlled plate then can start relevant refrigeration or the electric equipment of pumped vacuum systems by the program of setting, makes them carry out work by instruction.When the data that pressure or temperature sensor are passed back are in setting range, the electric equipment of single-chip microcomputer meeting instruction related system quits work, when the data that pressure or temperature sensor are passed back are not in setting range, the electric equipment of single-chip microcomputer meeting instruction related system starts again.After the refrigerator gas-tight door opened cuts out, can touch coupled door simultaneously and touch switch, this door touches switch and is connected with single-chip microcomputer, can start pumped vacuum systems and vacuumizes freezer box or fresh-keeping casing and freeze, when reaching setting value break-off.
The utility model compared with prior art tool has the following advantages:
The conduction of the cold energy 1, under vacuum conditions in freezer box and fresh-keeping casing can be relatively slow, the in like manner loss of cold energy also can be slow, so electric equipment does not need to continue to consume the energy, power supply refrigeration will be reduced like this, (through test, insulation power consumption under vacuum state is 1/5th of general refrigerator) therefore can save a large amount of electric energy, for user reduces use cost.
2, vacuum fresh-keeping box can be more a lot of than extending under Conventional cryogenic by the holding time of food under vacuum and low temperature state, and can ensure that the quality of food can not have greatly changed and still keep fresh.Vacuum refrigeration case is then by under precooling low temperature and cryogenic vacuum state, make Food Contact air capacity less, the chance of contact oxygen also reduces greatly, reduce pernicious gas to the impact of food freshness, this store method more can ensure the freshness of food than common cold storage mode, and the holding time of some food will extend more than 5 times than common refrigeration, the longlyest reach tens times, more can ensure that the nutrition of food changes on a small quantity, can also ensure that the color of food continues the time more grown.
The fresh-keeping correction data of food vacuum:
Accompanying drawing explanation
Fig. 1 is that master of the present utility model looks simplified schematic diagram.
Fig. 2 of the present utility modelly overlooks simplified schematic diagram.
Fig. 3 is the side-looking simplified schematic diagram of the utility model gas-tight door.
Fig. 4 is I close-up schematic view of Fig. 7.
Fig. 5 is II close-up schematic view of Fig. 3.
Fig. 6 is that the C of Fig. 3 is to partial enlargement simplified schematic diagram.
Fig. 7 is that Figure 1A is to the view removing shell.
Fig. 8 is that the utility model dedicated sealing member master looks section simplified schematic diagram.
Fig. 9 is that Figure 1B is to the view removing shell.
Detailed description of the invention
The central dividing plate 2 being divided into upper and lower two chambers is provided with in the middle of Box-type enclosures 1 shown in Fig. 1 and Fig. 2, upper and lower two corresponding with upper and lower two chambers respectively round tube holes are established in the side of shell, reinforcing ring 4 in hemisphere shell-type freezer box 3 lateral openings on it in round tube hole and upper chamber is fixedly linked, and the reinforcing ring 6 in hemisphere shell-type antistaling box body 5 lateral openings of its lower round tube hole and bottom chamber is fixedly linked.Above-mentioned freezer box and the external side face of antistaling box are respectively provided with the coupled some deep floors 7 in one end, and the other end of this deep floor is then connected with shell or central dividing plate respectively.Above-mentioned freezer box and the hemisphere shell-type gas-tight door 9 that the opening of fresh-keeping casing respectively establishes to be connected by hinge 8, the casing at they and respective place forms spherical shell.Also be provided with intelligent control panel 10 in the side shell upper being provided with gas-tight door, bottom is provided with thermovent 11.In the side-looking simplified schematic diagram of the utility model gas-tight door shown in Fig. 3, the annular end limit of gas-tight door has in establishing the O type rubber seal 12 of magnetic stripe, it is corresponding with the groove set by the reinforcing ring on freezer box or fresh-keeping box opening, as shown in Figure 4, gas-tight door annular end limit is also fixed with three uniform guides 13, a locking bar 14 is had to pass in the through hole of each guide, the end top section that locking bar is adjacent with reinforcing ring is inclined-plane, and the contact portion of locking bar and gas-tight door is rack shapes, the teeth of tooth bar are circular; In Figure 5, the inner that locking bar is positioned at gas-tight door center is placed in support member through the through hole of circular hollow support member 15 sidewall, the locking bar being positioned at support member is provided with strip through-hole, the through hole of support member end face is passed in bolt 16 one end through this strip through-hole, and the other end is through the through hole of the inner set disk of turning cylinder 17.Turning cylinder outer end reaches outside gas-tight door through gas-tight door central through hole, and end top is provided with rotates handwheel 18.Pressure cap 19 is provided with between gas-tight door central through hole and turning cylinder, its one end is located at outside gas-tight door, the other end and the mechanical seal be located in gas-tight door are overlapped 20 threaded one ends and are connected, the mechanical seal on the rotating shaft of this cover is overlapped between the other end and turning cylinder and is provided with mechanical sealing member 21, the turning cylinder of side adjacent with mechanical sealing member is provided with the axle sleeve 22 of locating is overlapped in mechanical seal, be provided with in this axle sleeve wall with axis being parallel run through through hole, be provided with screw 23 in it, this screw is connected with the flute profile screw in mechanical seal jacket wall.In the utility model refrigeration mechanism side-looking simplified schematic diagram shown in Fig. 7, refrigerating evaporator 24 is formed by some connected heat exchanger tubes and is enclosed in the pipe bundle combinations outside freezer box, this pipe bundle combinations is provided with total import and export pipe, its general import pipe exports with capillary 25 and is connected, this capillary inlet pipe exports with the coil pipe type filter 26 being located at enclosure and is connected, this filter inlet exports with coiler type condenser 27 and is connected, this condenser inlet exports with compressor 28 and is connected, and this compressor is connected with compressed gas cylinder 29.The bottom of refrigerating evaporator is connected with muffler 30 entrance point, and this return tube port of export is connected with compressor.Equally, fresh-keeping evaporimeter is also that some connected heat exchanger tubes form and are enclosed in the external pipe bundle combinations of antistaling box, this pipe bundle combinations is also provided with total import and export pipe, they are respectively connected with compressor return air pipe by an electrically-controlled valve 31,32, and general import pipe is close to return tube entrance point, general export pipe is close to the return tube port of export, and described electrically-controlled valve is connected with electric-controlled plate.Above-mentioned compressor is connected with electric-controlled plate 33 by automatic control switch.Separately in freezer box and refrigerated cabinet, respectively establish a temperature sensor 34, they are connected with electric-controlled plate respectively by wire, and wire is each passed through the dedicated sealing member 35 be located on freezer box and fresh-keeping casing.This electric-controlled plate is established in the enclosure, touches switch be connected with the intelligent control panel be located on shell by door.Separately in freezer box and fresh-keeping casing, be respectively equipped with article-displacing partition board 36 and illuminating lamp 37, the dedicated sealing member other end that the wire be connected with illuminating lamp is each passed through on freezer box and fresh-keeping casing is located on electric-controlled plate.Look in section simplified schematic diagram the utility model dedicated sealing member master shown in Fig. 8, this dedicated sealing member has a cylinder, the through hole of its periphery wall and place parts is connected, and both ends open lays respectively at through hole both sides, is provided with airtight and watertight padding through the object of cylinder chamber and cylinder.In the utility model vacuum device side-looking simplified schematic diagram shown in Fig. 9, freezer box is respectively connected with vacuum line 44 one end by a dedicated sealing member respectively with on fresh-keeping casing, this vacuum line other end being provided with electrically-controlled valve 45,38 is connected with vavuum pump 39 air inlet, and this vavuum pump is connected with electric-controlled plate by automatic control switch.Vacuum line near the dedicated sealing member of freezer box is provided with capillary type buffer 40.Vacuum line in addition between freezer box and fresh-keeping casing is provided with a coupled vacuum tube 41, be provided with electrically-controlled valve 42 in this vacuum tube end, the control cable of its electrically-controlled valve is connected with electric-controlled plate.Separately in freezer box He in fresh-keeping casing, respectively establish a pressure sensor 43, they are connected with electric-controlled plate with the dedicated sealing member other end on fresh-keeping casing through freezer box respectively by wire.The electric-controlled plate of vacuum device and the electric-controlled plate of refrigeration mechanism are one block of plate, and it also touches switch by door and is connected with the intelligent control panel be located on shell.Above-mentioned electric-controlled plate is provided with the single-chip microcomputer be made up of some modules, and this single-chip microcomputer is connected with the various function buttons (button) on intelligent control panel.
Claims (8)
1. a vacuum refrigeration fresh-keeping refrigerator, comprise housing, refrigeration mechanism, it is characterized in that: also comprise vacuum device, vacuum device comprises vavuum pump, dedicated sealing member, buffer, pressure sensor, electrically-controlled valve, check-valves and electric-controlled plate, freezer box is respectively connected with vacuum line one end by a dedicated sealing member respectively with on fresh-keeping casing, this vacuum line other end being provided with electrically-controlled valve is connected with air-inlet of vacuum pump, this vavuum pump is connected with electric-controlled plate by automatic control switch, vacuum line between freezer box and fresh-keeping casing is provided with a coupled vacuum tube, electrically-controlled valve is provided with in this vacuum tube end, the control cable of its electrically-controlled valve is connected with electric-controlled plate, separately in freezer box He in fresh-keeping casing, respectively establish a pressure sensor, they are connected with electric-controlled plate with the dedicated sealing member other end on fresh-keeping casing through freezer box respectively by wire, the electric-controlled plate of vacuum device and the electric-controlled plate of refrigeration mechanism are one block of plate, it also touches switch by door and is connected with the intelligent control panel be located on shell, above-mentioned electric-controlled plate is provided with the single-chip microcomputer be made up of some modules, this single-chip microcomputer is connected with the various function buttons on intelligent control panel.
2. vacuum refrigeration fresh-keeping refrigerator according to claim 1, it is characterized in that: in the middle of Box-type enclosures, be provided with the central dividing plate being divided into upper and lower two chambers, upper and lower two corresponding with upper and lower two chambers respectively round tube holes are established in the side of shell, reinforcing ring in hemisphere shell-type freezer box lateral openings on it in round tube hole and upper chamber is fixedly linked, and the reinforcing ring in the hemisphere shell-type antistaling box body lateral openings of its lower round tube hole and bottom chamber is fixedly linked; Above-mentioned freezer box and the external side face of antistaling box are respectively provided with the coupled some deep floors in one end, and the other end of this deep floor is then connected with shell or central dividing plate respectively; The opening of above-mentioned freezer box and fresh-keeping casing is respectively established one by hinged hemisphere shell-type gas-tight door, the casing at they and respective place forms spherical shell.
3. vacuum refrigeration fresh-keeping refrigerator according to claim 1 and 2, is characterized in that: the O type rubber seal having magnetic stripe in establishing on the annular end limit of gas-tight door, and it is corresponding with the groove set by the reinforcing ring on freezer box or fresh-keeping box opening, gas-tight door annular end limit is also fixed with three uniform guides, a locking bar is had to pass in the through hole of each guide, the end top section that locking bar is adjacent with reinforcing ring is inclined-plane, the inner that this locking bar is positioned at gas-tight door center is placed in support member through the through hole of circular hollow support member sidewall, the locking bar being positioned at support member is provided with strip through-hole, the through hole of support member end face is passed in bolt one end through this strip through-hole, and the other end passes the through hole of disk set by turning cylinder the inner, turning cylinder outer end reaches outside gas-tight door through gas-tight door central through hole, end top is provided with rotation handwheel, pressure cap is provided with between gas-tight door central through hole and turning cylinder, its one end is located at outside gas-tight door, the other end and the mechanical seal be located in gas-tight door are overlapped threaded one end and are connected, the mechanical seal on the rotating shaft of this cover is overlapped between the other end and turning cylinder and is provided with mechanical sealing member, the turning cylinder of side adjacent with mechanical sealing member is provided with the axle sleeve of locating is overlapped in mechanical seal, be provided with in this axle sleeve wall with axis being parallel run through through hole, screw is provided with in it, this screw is connected with the flute profile screw in mechanical seal jacket wall.
4. vacuum refrigeration fresh-keeping refrigerator according to claim 3, is characterized in that: the contact portion of locking bar and gas-tight door is rack shapes, and the teeth of tooth bar are circular.
5. vacuum refrigeration fresh-keeping refrigerator according to claim 2, is characterized in that: refrigeration mechanism refrigerating evaporator is formed by some connected heat exchanger tubes and is enclosed in the pipe bundle combinations outside freezer box, and this pipe bundle combinations is provided with total import and export pipe; Equally, fresh-keeping evaporimeter is also that some connected heat exchanger tubes form and are enclosed in the external pipe bundle combinations of antistaling box, this pipe bundle combinations is also provided with total import and export pipe, they are respectively connected with compressor return air pipe by an electrically-controlled valve, and general import pipe is close to return tube entrance point, general export pipe is close to the return tube port of export, and described electrically-controlled valve is connected with electric-controlled plate.
6. vacuum refrigeration fresh-keeping refrigerator according to claim 5, it is characterized in that: separately in freezer box and refrigerated cabinet, respectively establish a temperature sensor, they are connected with electric-controlled plate respectively by wire, and wire is each passed through the dedicated sealing member be located on freezer box and fresh-keeping casing, electric-controlled plate is established in the enclosure, touches switch be connected with the intelligent control panel be located on shell by door.
7. vacuum refrigeration fresh-keeping refrigerator according to claim 1, it is characterized in that: described dedicated sealing member has a cylinder, the through hole of its periphery wall and place parts is connected, and both ends open lays respectively at through hole both sides, is provided with airtight and watertight padding through the object of cylinder chamber and cylinder.
8. vacuum refrigeration fresh-keeping refrigerator according to claim 1, is characterized in that: the vacuum line near the dedicated sealing member of freezer box is provided with capillary type buffer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520826781.XU CN205119603U (en) | 2015-10-23 | 2015-10-23 | Vacuum freezing refrigerator that keeps fresh |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520826781.XU CN205119603U (en) | 2015-10-23 | 2015-10-23 | Vacuum freezing refrigerator that keeps fresh |
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| Publication Number | Publication Date |
|---|---|
| CN205119603U true CN205119603U (en) | 2016-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520826781.XU Active CN205119603U (en) | 2015-10-23 | 2015-10-23 | Vacuum freezing refrigerator that keeps fresh |
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| CN (1) | CN205119603U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110393090A (en) * | 2018-04-24 | 2019-11-01 | 鲁国庆 | Vacuum cold is guaranteed the quality silo |
| CN110395493A (en) * | 2018-04-24 | 2019-11-01 | 鲁国庆 | Vacuum cold freezes Keep the quality and freshness container |
| CN110395171A (en) * | 2018-04-24 | 2019-11-01 | 鲁国庆 | Vacuum cold freezes Keep the quality and freshness electric transporting vehicle |
-
2015
- 2015-10-23 CN CN201520826781.XU patent/CN205119603U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110393090A (en) * | 2018-04-24 | 2019-11-01 | 鲁国庆 | Vacuum cold is guaranteed the quality silo |
| CN110395493A (en) * | 2018-04-24 | 2019-11-01 | 鲁国庆 | Vacuum cold freezes Keep the quality and freshness container |
| CN110395171A (en) * | 2018-04-24 | 2019-11-01 | 鲁国庆 | Vacuum cold freezes Keep the quality and freshness electric transporting vehicle |
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| C14 | Grant of patent or utility model | ||
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