CN218043715U - Full heat recovery vacuum fresh-locking heat pump drying and puffing embrittlement system - Google Patents
Full heat recovery vacuum fresh-locking heat pump drying and puffing embrittlement system Download PDFInfo
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- CN218043715U CN218043715U CN202221214004.6U CN202221214004U CN218043715U CN 218043715 U CN218043715 U CN 218043715U CN 202221214004 U CN202221214004 U CN 202221214004U CN 218043715 U CN218043715 U CN 218043715U
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Abstract
The utility model provides a full heat recovery vacuum fresh-locking heat pump drying and puffing embrittlement system, belonging to the technical field of food processing equipment, comprising a vacuum wheel set system, a vacuum pump set system, a cold trap system, a heat recovery and temperature control circulating system; the vacuum wheel set system comprises n vacuum tanks connected in parallel, wherein one side of n more than or equal to 2,n vacuum tanks is provided with a main gas pipeline, the main gas pipeline is communicated with a puffing tank, and the vacuum tanks are communicated with the main gas pipeline through branch gas pipelines; the vacuum pump unit system is used for realizing and maintaining the vacuum degree of the vacuum tank, the vacuum pump unit system is communicated with the main gas pipeline, and the cold trap system is communicated between the vacuum pump unit system and the main gas pipeline; the heat energy recovery and temperature control circulating system is used for recovering heat of the vacuum pump unit system and the cold trap system, and is used for heating and cooling the vacuum tank; the utility model discloses realize that operation, low temperature stoving under full heat recovery, the vacuum are popped, can realize higher stoving article looks, stoving technology green.
Description
Technical Field
The utility model relates to a food processing equipment technical field, concretely relates to bright heat pump of full heat recovery vacuum lock is dried and popped embrittlement system.
Background
Puffed food is a new food developed internationally in recent years. The puffed food is prepared from grains, beans, potatoes, vegetables and the like as raw materials by processing through puffing equipment, and is various in puffed food variety, exquisite in appearance, rich in nutrition, crisp and delicious. Therefore, a broad category of food products is uniquely formed.
In the production process of the puffed food, after the food is formed, partial moisture needs to be removed in a drying device so as to carry out drying and shaping, so that the drying efficiency directly determines the production efficiency of the puffed food.
There are various food drying methods, such as high temperature drying, freeze drying, low temperature drying, etc. The high-temperature drying usually causes various physical and chemical changes of food, mainly has nutrient loss, flavor and appearance change and browning, the most important influencing factors are temperature and time, and the higher the temperature is, the longer the time is, the more serious the damage to substances is, so the high-temperature drying is not suitable for heat-sensitive substances; the original color, fragrance, taste and nutrition of the substances can be maintained by freezing and drying, the drying quality is the best, but the drying system has a complex structure, large initial investment of equipment, long drying time and extremely high energy consumption, so that the application of the drying system is limited.
The low-temperature drying is a process for drying food by utilizing low-temperature low-humidity air to circulate in the food to gradually reduce the water content of the food, the low-temperature drying has small damage to heat-sensitive substances and low cost, so great development potential is shown, the low-temperature drying is to use the air with extremely low moisture content and low temperature as a carrier to dry the materials, the temperature of the product in the drying process does not exceed 35 ℃, so the low-temperature drying is suitable for drying heat-sensitive materials such as medicines, foods and the like, the low-temperature drying is to use the steam pressure difference between the dry air and the wet materials as a driving force, and the key technology is to obtain the dry air.
At present, the puffed food drying equipment who adopts has some inadequacies because the limitation of stoving principle and structure: 1. the heat energy lost in the drying process is inconvenient to recycle, so that the energy is greatly wasted; 2. because of food direct with external cold air contact at the stoving in-process to cause: the drying time changes along with the change of the external temperature; the energy consumption changes along with the change of the external temperature, and the cost is also rapidly improved; the temperature is difficult to control within a required range, the temperature is too low, the error of the water content of the food is large, the food cannot reach a required value, and if the temperature is too high, the volume of the food expands to generate scorched particles; the contact with air affects the freshness of the product and the processing effect; 3. the processing of food in large batch or continuous operation is not convenient to realize, and the processing efficiency needs to be improved.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a bright heat pump of full heat recovery vacuum lock is dried and popped embrittlement system realizes that full heat recovery, operation, low temperature drying are popped under the vacuum, can realize higher stoving article looks, stoving technology green.
In order to solve the technical problem, the utility model provides a full heat recovery vacuum fresh-keeping heat pump drying and puffing embrittlement system, which comprises a vacuum wheel set system, a vacuum pump set system, a cold trap system, a heat recovery and temperature control circulating system;
the vacuum wheel set system comprises n vacuum tanks connected in parallel, wherein one side of n more than or equal to 2,n vacuum tanks is provided with a total gas pipeline, the total gas pipeline is communicated with a puffing tank, and the vacuum tanks are communicated with the total gas pipeline through branch gas pipelines;
the vacuum pump unit system is used for realizing and maintaining the vacuum degree of the vacuum tank, the vacuum pump unit system is communicated with the main gas pipeline, and the cold trap system is communicated between the vacuum pump unit system and the main gas pipeline;
the heat energy recovery and temperature control circulating system is used for recovering heat of the vacuum pump unit system and the cold trap system, and the heat energy recovery and temperature control circulating system is used for heating and cooling the vacuum tank.
By adopting the technical scheme, the vacuum wheel set system with multiple groups of vacuum tanks can be driven to operate, continuous operation of drying materials in the vacuum tanks can be realized, the requirement on vacuum degree can be met quickly, and the working efficiency is effectively improved.
Furthermore, a first air path valve is arranged on the branch air pipeline, a pressure release valve is arranged on the vacuum tank, and a pressure sensor is arranged in the vacuum tank.
Furthermore, a temperature and humidity sensor is arranged in the vacuum tank, a water coil is arranged in the vacuum tank, and the water coil is circularly communicated with the heat energy recovery and temperature control circulating system through a water inlet pipe and a water outlet pipe.
Further, the heat energy recovery and temperature control circulating system comprises a high-temperature water tank and an intermediate water tank;
the pipelines of the water inlet pipe and the water outlet pipe communicated with the high-temperature water tank are respectively provided with a first water valve, and the pipelines of the water inlet pipe and the water outlet pipe communicated with the middle water tank are respectively provided with a second water valve;
and a first circulating water pump is arranged on the water inlet pipe.
Furthermore, the middle water tank is communicated with the spray cooling tower in a circulating mode, a third water valve is arranged on a water drainage pipeline and a water return pipeline which are communicated between the middle water tank and the spray cooling tower, and a second circulating pump is arranged on the water drainage pipeline.
Further, the high-temperature water tank is communicated with the high-temperature heat pump hot water unit in a circulating mode, a high-temperature unit circulating pump is arranged on a circulating pipeline between the high-temperature water tank and the high-temperature heat pump hot water unit, and the high-temperature heat pump hot water unit is communicated with the vacuum pump unit system and the cold trap system through a heat recovery circulating pipeline.
By adopting the technical scheme, the environment drying is realized through the vacuum, the freshness in the material drying process is improved, the drying treatment effect is improved, in addition, the heating and cooling are realized through a circulating mode, and the scorching phenomenon is avoided while the drying rate is ensured.
On the one hand, the temperature in the vacuum tank can be improved through high-temperature circulation, the drying of the components is realized, and on the other hand, the embrittlement treatment can be realized through low-temperature circulating water and cooling.
Further, the vacuum pump unit system comprises a primary vacuum pump and a secondary vacuum pump which are sequentially connected in series, the secondary vacuum pump is communicated with the heat recovery circulation pipeline, and a second air path valve is arranged on a pipeline communicated with the cold trap system through the primary vacuum pump.
Further, the cold trap system comprises a cold trap catcher and a cold trap refrigerating unit for circularly refrigerating the cold trap catcher;
the main gas pipeline is communicated with one side of the cold trap, the primary vacuum pump is communicated with one side of the bottom end of the cold trap, a condensed water drain pipe is arranged at the bottom end of the cold trap, and a drain valve is arranged on the condensed water drain pipe;
one side of the cold trap refrigerating unit is communicated with a heat recovery circulating pipeline.
By adopting the technical scheme, the closed loop is integrally formed, the heat generated by the cold trap system and the vacuum pump unit system is effectively recovered, and the heat recovery system is used for heating water in the high-temperature water tank, effectively improving the heat recovery and reducing the waste of energy.
Furthermore, a third air path valve is arranged on a pipeline communicated between the expansion tank and the main air pipeline, and a pressure valve is arranged on the expansion tank.
The utility model discloses an above-mentioned technical scheme's beneficial effect as follows:
1. the utility model discloses can realize that the drive contains the vacuum wheelset system operation of multiunit vacuum jar, realize the continuity of operation of the interior stoving material of vacuum jar, can satisfy and reach the vacuum requirement fast, effectively improve work efficiency.
2. The utility model discloses in, wholly constitute closed loop, the heat that cold-trap system and vacuum pump unit system produced is effectively retrieved, and is used for effectively improving heat recovery for the hot-water heating of high temperature water tank, reduces the waste to the energy.
3. The utility model discloses in, can realize diversified processings such as material bulking, stoving, embrittlement, form the associated operating system of comparatively accomplishing, it is more convenient to use.
4. The utility model discloses in, realize the environment through the vacuum and dry, improve the fresh-keeping degree in the material stoving process, improve the stoving treatment effect, in addition, realize heating and cooling through the circulation mode, avoid appearing burnt phenomenon when guaranteeing the stoving rate;
on the one hand, the temperature in the vacuum tank can be improved through high-temperature circulation, the drying of the components is realized, and on the other hand, the embrittlement treatment can be realized through low-temperature circulating water and cooling.
Drawings
Fig. 1 is a schematic view of a full heat recovery vacuum fresh-locking heat pump drying and puffing embrittlement system of the utility model;
FIG. 2 is a schematic view of a vacuum wheel assembly system according to the present invention;
fig. 3 is a schematic diagram of the cold trap system of the present invention;
fig. 4 is a schematic view of the heat energy recovery and temperature control circulation system of the present invention.
1. A vacuum wheel set system; 11. a vacuum tank; 111. a branch gas line; 112. a first air passage valve; 113. a pressure relief valve; 114. a pressure sensor; 115. a temperature and humidity sensor; 116. a water coil pipe; 117. a water inlet pipe; 118. a water outlet pipe; 12. a total gas line; 13. a puffing tank; 131. a third air passage valve; 132. a pressurization valve;
2. a vacuum pump unit system; 21. a primary vacuum pump; 22. a secondary vacuum pump; 23. a second air passage valve;
3. a cold trap system; 31. a cold trap; 32. a cold trap refrigerating unit;
4. a heat energy recovery and temperature control circulating system; 41. a high temperature water tank; 411. a first water valve; 42. an intermediate water tank; 421 a second water valve; 43. a first circulating water pump; 44. spraying a cooling tower; 441. a third water valve; 442. a second circulation pump; 45. a high temperature heat pump hot water unit; 451. a high-temperature unit circulating pump; 452. and a heat recovery circulation pipeline.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 4 of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the present invention, belong to the protection scope of the present invention.
As shown in fig. 1-4: a full heat recovery vacuum fresh-locking heat pump drying and puffing embrittlement system comprises a vacuum wheel set system 1, a vacuum pump set system 2, a cold trap system 3 and a heat recovery and temperature control circulating system 4;
the vacuum wheel set system 1 comprises 4 vacuum tanks 11 connected in parallel, a main air pipeline 12 is arranged on one side of n vacuum tanks, a puffing tank 13 is communicated with the main air pipeline 12, and the vacuum tanks 11 are communicated with the main air pipeline 12 through branch air pipelines 111;
the vacuum pump set system 2 is used for realizing and maintaining the vacuum degree of the vacuum tank 11, the vacuum pump set system 2 is communicated with the main gas pipeline 12, and the cold trap system 3 is communicated between the vacuum pump set system 2 and the main gas pipeline 12;
the heat energy recovery and temperature control circulation system 4 is used for recovering the heat of the vacuum pump unit system 2 and the cold trap system 3, and the heat energy recovery and temperature control circulation system 4 is used for heating and cooling the vacuum tank 11.
Wherein, be equipped with third gas circuit valve 131 on the pipeline of intercommunication between popped jar 13 and the total gas pipeline 12, be equipped with pressure valve 132 on popped jar 13.
Specifically, the expansion treatment can be performed by the expansion tank 13.
Wholly constitute closed circuit, the effective recovery of heat that cold-trap system and vacuum pump unit system produced, and be used for the water heating of high temperature water tank, effectively improve heat recovery, reduce the waste to the energy.
The branch gas pipeline 111 is provided with a first gas circuit valve 112, the vacuum tank 11 is provided with a pressure release valve 113, and the vacuum tank 11 is provided with a pressure sensor 114.
A temperature and humidity sensor 115 is arranged in the vacuum tank 11, a water coil 116 is arranged in the vacuum tank 11, and the water coil 116 is circularly communicated with the heat energy recovery and temperature control circulating system 4 through a water inlet pipe 117 and a water outlet pipe 118.
The heat energy recovery and temperature control circulating system 4 comprises a high-temperature water tank 41 and an intermediate water tank 42;
the pipelines of the water inlet pipe 117 and the water outlet pipe 118 communicated with the high-temperature water tank 41 are respectively provided with a first water valve 411, and the pipelines of the water inlet pipe 117 and the water outlet pipe 118 communicated with the middle water tank 42 are respectively provided with a second water valve 421;
the water inlet pipe 117 is provided with a first circulating water pump 43.
The middle water tank 42 is externally communicated with the spray cooling tower 44 in a circulating manner, a water drainage pipeline and a water return pipeline which are communicated between the middle water tank 42 and the spray cooling tower 44 are respectively provided with a third water valve 441, and the water drainage pipeline is provided with a second circulating pump 442.
The high-temperature water tank 41 is in circulating communication with the high-temperature heat pump hot water unit 45, and a high-temperature unit circulating pump 451 is arranged on a circulating pipeline between the high-temperature water tank 41 and the high-temperature heat pump hot water unit 45.
Realize the environment through the vacuum and dry, improve the fresh-keeping degree among the material stoving process, improve the drying process effect, in addition, realize heating and cooling through the circulation mode, avoid appearing burnt phenomenon when guaranteeing the stoving rate.
On the one hand, the temperature in the vacuum tank 11 can be improved through high-temperature circulation, the drying of the components is realized, and on the other hand, the embrittlement treatment can be realized through low-temperature circulating water and cooling.
In another embodiment of the present invention, as shown in figure 1,
the high-temperature heat pump hot water unit 45 is communicated with the vacuum pump unit system 2 and the cold trap system 3 through a heat recovery circulation pipeline 452.
The vacuum pump unit system 2 comprises a primary vacuum pump 21 and a secondary vacuum pump 22 which are sequentially connected in series, the secondary vacuum pump 22 is communicated with a heat recovery circulation pipeline 452, and a second air path valve 23 is arranged on a pipeline through which the primary vacuum pump 21 is communicated with the cold trap system 3.
The cold trap system 3 comprises a cold trap catcher 31 and a cold trap refrigerating unit 32 for circularly refrigerating the cold trap catcher 31;
the main gas pipeline 12 is communicated with one side of the cold trap 31, the primary vacuum pump 21 is communicated with one side of the bottom end of the cold trap 31, a condensed water drain pipe is arranged at the bottom end of the cold trap 31, and a drain valve is arranged on the condensed water drain pipe;
one side of the cold trap refrigeration unit 32 is in communication with a heat recovery circulation line 452.
The whole closed loop is formed, heat generated by the cold trap system and the vacuum pump unit system is effectively recovered, and the heat recovery system is used for heating water in the high-temperature water tank, effectively improving heat energy recovery and reducing waste of energy.
The utility model discloses a working method: when the vacuum refreshing drying is specifically realized, materials are added into the vacuum tanks 11 one by one, and as shown in fig. 1, the four vacuum tanks 11 are numbered as a first vacuum tank, a second vacuum tank, a third vacuum tank and a fourth vacuum tank from top to bottom in sequence; then, opening a second air path valve 23 in the vacuum pump unit system 2 and a first air path valve 112 on an air supply pipeline 111 of the first vacuum tank, starting a primary vacuum pump 21 and a secondary vacuum pump 22 to work, opening the first air path valve 112 on the air supply pipeline 111 of the second vacuum tank after the first vacuum tank reaches a vacuum degree, entering a vacuum pumping link, and sequentially and alternately processing; after the first vacuum tank reaches the target vacuum time, the pressure is released through the pressure release valve 113 on the first vacuum tank, the pressure release time is entered, then the vacuum pumping treatment is entered again, and the second vacuum tank, the third vacuum tank and the fourth vacuum tank are also subjected to the pressure release and vacuum pumping treatment alternately in sequence.
Meanwhile, the first water valve 411 on the pipeline connecting the water inlet pipe 117 and the water outlet pipe 118 with the high temperature water tank 41 is opened to heat the vacuum tank 11 by the hot circulating water, during the vacuum pumping, the pumped damp hot air passes through the cold trap 31, the moisture in the pumped air is condensed into water in the cold trap 31 and is discharged by the condensed water drain pipe, wherein the cold trap refrigerating unit 32 cools the cold trap 31 by the circulation of the refrigerant between the cold trap refrigerating unit 32 and the cold trap 31, the refrigerant absorbs heat and then returns to the cold trap refrigerating unit 32, the heat is recovered to the high temperature heat pump hot water unit 45, the high temperature heat pump hot water unit 45 is used for heating the high temperature water tank, and similarly, the heat generated by the vacuum pump hot water unit 2 is also recovered to the high temperature heat pump hot water unit 45.
When the material needs to be embrittled, after the material is dried and decompressed in the vacuum tank 11, the air path valve is closed, the first water valve 411 communicated with the high-temperature water tank 41 is closed, the second water valve 421 on the pipeline communicated with the intermediate water tank 42 is opened, low-temperature cold water in the intermediate water tank 42 is circulated and circulated into the vacuum tank 11, embrittling is achieved, and after the temperature of the circulating water in the intermediate water tank 42 is increased in the process of temperature reduction, the circulating water in the intermediate water tank 42 can be cooled through circulation communication with the spray cooling tower 44.
When the material needs to be puffed, the material to be puffed is placed into the puffing tank 13, high-pressure nitrogen is injected through the pressurizing valve 132 for maintaining the pressure for a certain time, after all the vacuum tanks 11 reach the target vacuum degree, the third air path valve 131 is rapidly opened and maintained for a certain time, and then the third air path valve 131 is closed, and the material is subjected to pressure relief.
This technical scheme realizes total heat recovery, avoids the energy extravagant, and operation, low temperature are dried popped under the vacuum, effectively improve the fresh-keeping degree among the stoving process, optimize the stoving effect, can realize higher stoving article looks, and stoving technology green realizes continuity of operation among the stoving process, improves machining efficiency.
Can realize the diversified treatments such as material bulking, drying, embrittlement and the like, form a relatively finished associated operation system and be more convenient to use.
In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate medium, and may be used for communicating the inside of two elements or for interacting with each other, unless otherwise specifically defined, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to the specific circumstances.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. Fresh heat pump stoving and popped embrittlement system of full heat recovery vacuum lock, its characterized in that: comprises a vacuum wheel set system (1), a vacuum pump set system (2), a cold trap system (3) and a heat energy recovery and temperature control circulating system (4);
the vacuum wheel set system (1) comprises n vacuum tanks (11) connected in parallel, wherein one side of n is more than or equal to 2,n vacuum tanks (11) is provided with a total air pipeline (12), the total air pipeline (12) is communicated with a puffing tank (13), and the vacuum tanks (11) are communicated with the total air pipeline (12) through branch air pipelines (111);
the vacuum pump unit system (2) is used for realizing and maintaining the vacuum degree of the vacuum tank (11), the vacuum pump unit system (2) is communicated with the main gas pipeline (12), and the cold trap system (3) is communicated between the vacuum pump unit system (2) and the main gas pipeline (12);
the heat energy recovery and temperature control circulating system (4) is used for recovering heat of the vacuum pump unit system (2) and the cold trap system (3), and the heat energy recovery and temperature control circulating system (4) is used for heating and cooling the vacuum tank (11).
2. The full heat recovery vacuum fresh-locking heat pump drying and puffing embrittlement system of claim 1, wherein: be equipped with first air circuit valve (112) on bronchus (111), be equipped with relief valve (113) on vacuum tank (11), be equipped with pressure sensor (114) in vacuum tank (11).
3. The full heat recovery vacuum fresh-keeping heat pump drying and puffing embrittlement system of claim 2, wherein: be equipped with temperature and humidity sensor (115) in vacuum tank (11), be equipped with water coil pipe (116) in vacuum tank (11), water coil pipe (116) are through inlet tube (117) and outlet pipe (118) and heat recovery and control by temperature change circulation system (4) circulation intercommunication.
4. The full heat recovery vacuum fresh-keeping heat pump drying and puffing embrittlement system of claim 3, wherein: the heat energy recovery and temperature control circulating system (4) comprises a high-temperature water tank (41) and an intermediate water tank (42);
the pipelines of the water inlet pipe (117) and the water outlet pipe (118) communicated with the high-temperature water tank (41) are respectively provided with a first water valve (411), and the pipelines of the water inlet pipe (117) and the water outlet pipe (118) communicated with the middle water tank (42) are respectively provided with a second water valve (421);
and a first circulating water pump (43) is arranged on the water inlet pipe (117).
5. The full heat recovery vacuum fresh-keeping heat pump drying and puffing embrittlement system of claim 4, wherein: middle water tank (42) is external with spray cooling tower (44) circulation intercommunication, all be equipped with third water valve (441) on the water drainage pipeline and the return water pipeline of intercommunication between middle water tank (42) and spray cooling tower (44), be equipped with second circulating pump (442) on the water drainage pipeline.
6. The full heat recovery vacuum fresh-keeping heat pump drying and puffing embrittlement system of claim 4, wherein: high temperature water tank (41) and high temperature heat pump hot water unit (45) circulation intercommunication, be equipped with high temperature unit circulating pump (451) on the circulating line between high temperature water tank (41) and high temperature heat pump hot water unit (45), high temperature heat pump hot water unit (45) are through heat recovery circulating line (452) and vacuum pump unit system (2), cold-trap system (3) intercommunication.
7. The full heat recovery vacuum fresh-keeping heat pump drying and puffing embrittlement system of claim 6, wherein: vacuum pump unit system (2) is including primary vacuum pump (21), secondary vacuum pump (22) of series connection in proper order, secondary vacuum pump (22) and heat recovery circulation pipeline (452) intercommunication, be equipped with second gas circuit valve (23) on the pipeline of primary vacuum pump (21) and cold trap system (3) intercommunication.
8. The full heat recovery vacuum fresh-locking heat pump drying and puffing embrittlement system of claim 7, wherein: the cold trap system (3) comprises a cold trap catcher (31) and a cold trap refrigerating unit (32) for circularly refrigerating the cold trap catcher (31);
the main gas pipeline (12) is communicated with one side of the cold trap (31), the primary vacuum pump (21) is communicated with one side of the bottom end of the cold trap (31), a condensed water drain pipe is arranged at the bottom end of the cold trap (31), and a drain valve is arranged on the condensed water drain pipe;
one side of the cold trap refrigerating unit (32) is communicated with a heat recovery circulation pipeline (452).
9. The full heat recovery vacuum fresh-keeping heat pump drying and puffing embrittlement system of claim 1, wherein: and a third air path valve (131) is arranged on a pipeline communicated between the expansion tank (13) and the main air pipeline (12), and a pressure valve (132) is arranged on the expansion tank (13).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221214004.6U CN218043715U (en) | 2022-05-20 | 2022-05-20 | Full heat recovery vacuum fresh-locking heat pump drying and puffing embrittlement system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221214004.6U CN218043715U (en) | 2022-05-20 | 2022-05-20 | Full heat recovery vacuum fresh-locking heat pump drying and puffing embrittlement system |
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| CN218043715U true CN218043715U (en) | 2022-12-16 |
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| CN202221214004.6U Active CN218043715U (en) | 2022-05-20 | 2022-05-20 | Full heat recovery vacuum fresh-locking heat pump drying and puffing embrittlement system |
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