CN208504872U - Utilize the freeze dryer energy conserving system of solar energy absorption type refrigeration - Google Patents
Utilize the freeze dryer energy conserving system of solar energy absorption type refrigeration Download PDFInfo
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- CN208504872U CN208504872U CN201820937286.XU CN201820937286U CN208504872U CN 208504872 U CN208504872 U CN 208504872U CN 201820937286 U CN201820937286 U CN 201820937286U CN 208504872 U CN208504872 U CN 208504872U
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- water tank
- defrosting water
- freeze dryer
- air conditioner
- defrosting
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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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
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model relates to a kind of freeze dryer energy conserving systems using solar energy absorption type refrigeration, the system adds the heat storage units of the components such as defrosting water tank, air conditioner afterheat heat exchange mechanisms composition, defrosting water tank is connected by air conditioner afterheat recovering mechanism with the condenser of absorption refrigeration unit and absorber, it is recycled for the waste heat to condenser and absorber, and defrosting water tank is connect with solar thermal unit, to carry out caloic exchange, the defrosting water of heating can be supplied cold-trap and defrosted by the defrosting valve connecting with defrosting water tank.Compared with prior art, the utility model can absorb, store absorption refrigeration unit waste heat and solar energy waste heat, and the defrosting system for being used for freeze dryer defrosts.
Description
Technical field
The utility model relates to freeze dryer technology fields, more particularly, to a kind of freeze-drying using solar energy absorption type refrigeration
Machine energy conserving system.
Background technique
The process characteristic of vacuum freeze drying exactly will be frozen into solid article under vacuum conditions, and distillation is fallen in article
Moisture and the moisture content that finally makes article dry, and distil, be transferred on cold-trap coil pipe and sublimated again as ice.This feature determines
: freeze dryer is that distillation is fallen the moisture of article and needs to be heated using the heating agent circulatory system to material, and is sublimated on cold-trap coil pipe
Ice be necessarily required to a large amount of heat also to discharge after melting.
Freeze dryer is in freezing dry process, the vapor that cold-trap needs continuous capturing distillation to generate, so cold-trap coil pipe
On can constantly freeze, the ice of cold-trap coil pipe capture requires ice-melt after each freeze-drying batch, and ice-melt needs largely high again
The defrosting water or defrosting steam of temperature；For the freeze dryer containing the heating agent circulatory system, since lyophilization needs constantly to absorb
Heat, so, article lyophilization from starting until drying terminates, the required heat of distillation by the heating agent circulatory system electricity
Heater provides；Preparation defrosting water or defrosting steam and the electric heater for providing necessary heat for distillation need a large amount of consumption
The energy, the excessive energy consumption of freeze dryer cause the excessively high serious waste with the energy of freeze-drying cost of freeze-drying article.
Absorber and the heat of condenser discharge need cooling tower to be cooled down in absorption type air-conditioner refrigeration system, especially
Absorber, heat exhaust is one times more than Ordinary Compression formula refrigeration machine.But these heats are equivalent to directly after cooling tower
It wastes, and the operation and maintenance of cooling tower are also required to spend human and material resources.
Summary of the invention
The purpose of this utility model is exactly to provide to overcome the problems of the above-mentioned prior art and a kind of utilize the sun
The freeze dryer energy conserving system of energy absorption refrigeration.Freeze dryer can not only stable absorption, storage room conditioning fortune using the system
The heat of each system discharge during row, and the heat can also be applied to need to provide heat in freeze dryer operational process
Except indoor waste heat in defrosting system, is taken full advantage of, the investment of cooling tower is saved, while reducing freeze dryer energy consumption, reduces and freezes
Dry cost.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of freeze dryer energy conserving system using solar energy absorption type refrigeration, the defrosting for freeze dryer cold-trap, comprising:
Absorption refrigeration unit, including generator, condenser, evaporator and absorber,
Solar thermal unit, including solar thermal collector, the refrigeration boiler being connect with solar thermal collector and use
In the electric heater of heating refrigeration boiler, the refrigeration boiler is connect with generator, to exchange heat；
Heat storage units, including defrosting water tank and air conditioner afterheat recovering mechanism, defrosting water tank are recycled by air conditioner afterheat
Mechanism is connected with the condenser of absorption refrigeration unit and absorber, recycles for the waste heat to condenser and absorber,
And defrosting water tank and solar thermal collector and refrigeration boiler are connected, and solar thermal collector with freeze boiler it
Between, between solar thermal collector and defrosting water tank and form solar energy heating between refrigeration boiler and defrosting water tank and follow
Loop back path is connected with defrosting water circulation pipe between defrosting water tank and freeze dryer cold-trap.
Preferably, the solar energy heating circulation loop is equipped with solar energy heating circulating pump.
Preferably, the solar thermal unit is additionally provided with the electric heater for heating refrigeration boiler.
Preferably, the air conditioner afterheat recovering mechanism includes air conditioner afterheat heat exchanger, air conditioner afterheat recovery pump and company
The air conditioner afterheat recycling circulation line being connected between air conditioner afterheat heat exchanger, condenser and absorber, air conditioner afterheat recovery pump are set
It is placed on air conditioner afterheat recycling circulation line.
Preferably, the defrosting water tank is connected with air conditioner afterheat heat exchanger, and the air conditioner afterheat recovery pump was both
It is connected with air conditioner afterheat heat exchanger, and is connected with defrosting water tank.
Preferably, the air conditioner afterheat heat exchanger is set to inside defrosting water tank.
Preferably, along flow direction of medium, on from defrosting water tank to the defrosting water circulation pipe between freeze dryer cold-trap
Equipped with UTILIZATION OF VESIDUAL HEAT IN circulating pump and defrosting valve, it is equipped with from freeze dryer cold-trap to the defrosting water circulation pipe between defrosting water tank
Defrosting water recovery valve and defrosting water recovery pump.
Preferably, water tank overflow mouth is equipped at the top of the defrosting water tank.
Preferably, freeze dryer cold-trap is additionally provided with cold-trap dump valve.
Preferably, generator, condenser, evaporator and the absorber of the absorption refrigeration unit pass sequentially through refrigeration
Agent piping connection, and the refrigerant pipe road between condenser and evaporator is equipped with refrigerant throttle valve；The generator
Solution circulation line is equipped between absorber, along flow direction of medium, from generator to the solution circulation pipe between absorber
Road is equipped with solution throttle valve, and solution pump is equipped with from absorber to the solution circulation line between generator.
The operation method of the above-mentioned freeze dryer energy conserving system using solar energy absorption type refrigeration is as follows:
When absorption refrigeration cell operation, the defrosted water in defrosting water tank is obtained by air conditioner afterheat recovering mechanism inhales
The waste heat of receipts formula refrigeration unit, and carry out caloic with solar thermal unit and exchange, if not needing to carry out removing for freeze dryer cold-trap
Frost, the defrosted water in defrosting water tank are used to promote the collection thermal cycle of solar thermal unit, if desired carry out freeze dryer cold-trap
Defrosting, then open defrosting water circulation pipe, defrosted using defrosted water；
When absorption refrigeration unit stops working, defrosted water and solar thermal unit in defrosting water tank carry out heat
If desired mass transter carries out the defrosting of freeze dryer cold-trap, open defrosting water circulation pipe, defrosted using defrosted water.
Compared with prior art, the utility model has the following beneficial effects:
Freeze dryer uses the energy conserving system of the utility model, can not only stable absorption, air-conditioning refrigeration system in storage room
The exhaust gas heat of middle absorber and condenser, and can will absorb, storage heat be applied to defrosting system cold-trap defrosting and
The heating agent of the heating agent circulatory system is heated.The utility model takes full advantage of in absorption refrigeration unit operational process and discharges
Heat, so that absorption refrigeration unit itself has been achieved the effect that refuse reclamation, and be saved greatly the energy of freeze dryer
Consumption, reduces the freeze-drying cost of article, reasonable in design, easy to use.
Detailed description of the invention
Fig. 1 is the connection schematic diagram of the utility model.
In figure, 1 is generator, and 2 be condenser, and 3 be evaporator, and 4 be evaporator, and 5 be refrigerant throttle valve, and 6 be solution
Throttle valve, 7 be solution pump, and 8 be solar thermal collector, and 9 be solar energy heating circulating pump, and 10 be refrigeration boiler, and 11 be water tank
Overflow port, 12 be defrosting water tank, and 13 be defrosting valve, and 14 be freeze dryer cold-trap, and 15 be cold-trap coil pipe, and 16 be cold-trap dump valve,
17 be defrosting water recovery valve, and 18 be defrosting water recovery pump, and 19 be air conditioner afterheat heat exchanger, and 20 be air conditioner afterheat recovery pump, and 21 are
UTILIZATION OF VESIDUAL HEAT IN circulating pump.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
Embodiment 1
A kind of freeze dryer energy conserving system using solar energy absorption type refrigeration, as shown in Figure 1, for freeze dryer cold-trap 14
Defrosting, which is characterized in that including absorption refrigeration unit, solar thermal unit and heat storage units, in which:
Absorption refrigeration unit includes generator 1, condenser 2, evaporator 3 and absorber 4；Solar thermal unit includes
Solar thermal collector 8 and the refrigeration boiler 10 connecting with solar thermal collector 8, refrigeration boiler 10 are connect with generator 1,
To exchange heat；Heat storage units include defrosting water tank 12 and air conditioner afterheat recovering mechanism, and defrosting water tank 12 passes through air-conditioning
Waste heat recovering mechanism is connected with the condenser 2 of absorption refrigeration unit and absorber 4, for condenser 2 and absorber more than 4
Heat is recycled, and defrosting water tank 12 is connect with solar thermal unit, to carry out caloic exchange；Defrosting water tank 12
Defrosting water circulation pipe is connected between freeze dryer cold-trap 14.
Specifically, in the present embodiment, absorption refrigeration unit is absorption room conditioning, and generator 1, steams condenser 2
Hair device 3 passes sequentially through refrigerant line with absorber 4 and connects, and the refrigerant pipe road between condenser 2 and evaporator 3 is set
There is refrigerant throttle valve 5；Solution circulation line is equipped between generator 1 and absorber 4, along flow direction of medium, from generator 1
It is equipped with solution throttle valve 6 to the solution circulation line between absorber 4, from absorber 4 to the solution circulation between generator 1
Pipeline is equipped with solution pump 7.
Water tank overflow mouth 11 is equipped in the present embodiment at the top of defrosting water tank 12.Defrosting water tank 12 and solar thermal collector
8 are connected with refrigeration boiler 10, and between solar thermal collector 8 and the boiler 10 that freezes, solar thermal collector 8 and defrosting
Solar energy heating circulation loop is formed between water tank 12 and between refrigeration boiler 10 and defrosting water tank 12.Solar energy collection
Soft circulation circuit is equipped with solar energy heating circulating pump 9.Moreover, the solar thermal unit of the present embodiment is additionally provided with for heating
The electric heater of refrigeration boiler 10.The air conditioner afterheat recovering mechanism of the present embodiment includes air conditioner afterheat heat exchanger 19, more than air-conditioning
Recuperation of heat pump 20 and the air conditioner afterheat recycling circulation pipe being connected between air conditioner afterheat heat exchanger 19, condenser 2 and absorber 4
Road, air conditioner afterheat recovery pump 20 are set on air conditioner afterheat recycling circulation line.Defrosting water tank 12 and air conditioner afterheat heat exchanger
19 are connected, and air conditioner afterheat recovery pump 20 was not only connected with air conditioner afterheat heat exchanger 19, but also are connected with defrosting water tank 12.More into one
Step, the air conditioner afterheat heat exchanger 19 in the present embodiment is set to inside defrosting water tank 12.
In the present embodiment, cold-trap coil pipe 15 is equipped in freeze dryer cold-trap 14, and freeze dryer cold-trap 14 is additionally provided with cold-trap row
Valve 16 out, for defrosting water circulation pipe in this present embodiment, along flow direction of medium, from defrosting water tank 12 to freeze-drying
Defrosting water circulation pipe between machine cold-trap 14 is equipped with UTILIZATION OF VESIDUAL HEAT IN circulating pump 21 and defrosting valve 13, from freeze dryer cold-trap 14 to
Defrosting water circulation pipe between defrosting water tank 12 is equipped with defrosting water recovery valve 17 and defrosting water recovery pump 18.
The operation method of the above-mentioned freeze dryer energy conserving system using solar energy absorption type refrigeration:
When absorption refrigeration cell operation, the defrosted water in defrosting water tank 12 is obtained by air conditioner afterheat recovering mechanism
The waste heat of absorption refrigeration unit, and carry out caloic with solar thermal unit and exchange, if not needing to carry out freeze dryer cold-trap 14
Defrosting, the defrosted water in defrosting water tank 12 is used to promote the collection thermal cycle of solar thermal unit, is if desired lyophilized
The defrosting of machine cold-trap 14 is then opened defrosting water circulation pipe, is defrosted using defrosted water；
When absorption refrigeration unit stops working, defrosted water and solar thermal unit in defrosting water tank 12 are carried out
Caloic exchange, if desired carries out the defrosting of freeze dryer cold-trap 14, opens defrosting water circulation pipe, is defrosted using defrosted water.
Specifically, when room conditioning is run, defrosting water tank 12 can be heated, and the heat in defrosting water tank 12
Water can promote the collection thermal cycle of refrigeration boiler 10 and solar thermal collector 8.Condenser 2 and absorber 4 produce in room conditioning
Raw waste heat is connected by air conditioner afterheat recovery pump 20 with the air conditioner afterheat heat exchanger 19 in defrosting water tank 12, and air-conditioning is utilized
Waste heat heats the water in defrosting water tank 12 as heat source.If freeze dryer not running, defrosting valve 13, which is in, at this time is closed
State, the water being heated in defrosting water tank 12 is under the action of solar energy heating circulating pump 9 in defrosting water tank 12, solar energy
It is recycled between heat collector 8, while being exchanged heat with refrigeration boiler 10 by the hot water that generator 1 cools down, reduce the sun
The load of energy heat collector 8.When freeze dryer operation, meeting frosting, defrosts in freeze dryer cold-trap 14.Defrosting is opened at this time
Valve 13, at this point, 12 moisture goes out a branch and passes through defrosting under the action of UTILIZATION OF VESIDUAL HEAT IN circulating pump 21 in defrosting water tank
Valve 13, into freeze dryer cold-trap 14, the defrosting water of high temperature removes the frosting above cold-trap coil pipe 15.At this point, defrosting water recycles
Valve 17 is opened, and the low temperature defrosting water after thawing is again introduced into defrosting water tank 12, by air-conditioning under the action of defrosting water recovery pump
Afterheat heat exchanger 19 is heated using air conditioner afterheat, to form a defrosting water circulation.Due to defrosting water tank 12 and refrigeration heat
Water tank 10 and solar thermal collector 8 are attached by solar energy heating circulating pump 9, therefore defrosting water is under the heating of dual heat source
Good defrosting effect can be played.At the end of defrosting, defrosting valve 13 and defrosting water recovery valve 17 are closed.At this point, defrosting water storage
Water in case 12 will recycle in solar energy heating circulation loop again, carry out auxiliary heat cycles to refrigeration boiler 10.
When room conditioning and not running but when needing to defrost, solar thermal collection system simultaneously can to defrosting water tank 12 into
Row heating.And the electric heating of solar thermal collection system itself be also able to satisfy defrosting water tank 12 needed for heat.
The other all parts of the utility model are also the component directly bought in the market, the connection method between them, all
The common sense for well known to those of ordinary skill in the art, just no longer describes here.
Waste heat in the utility model room covers all fields that air conditioner afterheat, industrial exhaust heat etc. meet UTILIZATION OF VESIDUAL HEAT IN
System in one's power.
Technical solutions of the utility model are suitble to use in any freeze dryer, are particularly suitable for large-scale freeze dryer and use.Together
When, technical solution described in the utility model not only can be with stand-alone application, also simultaneously can the public a set of heat accumulation system of more freeze dryers
System forms heat accumulation station Application of composite.
According to the utility model, in addition to that can be widely applied in the production of freeze dryer, can also to existing freeze dryer into
Row technological transformation, to achieve the purpose that energy efficiency.
The above-mentioned description to embodiment is for ease of ordinary skill in the art to understand and use the invention.It is ripe
The personnel for knowing art technology obviously easily can make various modifications to these embodiments, and general original described herein
It ought to use in other embodiments without having to go through creative labor.Therefore, the utility model is not limited to the above embodiments, this
Field technical staff announcement according to the present utility model, does not depart from improvement that the utility model scope is made and modification all should
It is within the protection scope of the utility model.
Claims (7)
1. a kind of freeze dryer energy conserving system using solar energy absorption type refrigeration is used for the defrosting of freeze dryer cold-trap (14), special
Sign is, comprising:
Absorption refrigeration unit, including generator (1), condenser (2), evaporator (3) and absorber (4),
Solar thermal unit, including solar thermal collector (8), the refrigeration boiler (10) being connect with solar thermal collector (8)
And the electric heater for heating refrigeration boiler (10), the refrigeration boiler (10) are connect with generator (1), to
It exchanges heat；
Heat storage units, including defrosting water tank (12) and air conditioner afterheat recovering mechanism, defrosting water tank (12) pass through air conditioner afterheat
Recovering mechanism is connected with the condenser (2) of absorption refrigeration unit and absorber (4), for condenser (2) and absorber (4)
Waste heat recycled, and defrosting water tank (12) and solar thermal collector (8) and refrigeration boiler (10) are connected, and
Between solar thermal collector (8) and refrigeration boiler (10), between solar thermal collector (8) and defrosting water tank (12) and make
Solar energy heating circulation loop, defrosting water tank (12) and freeze dryer are formed between hot and cold water tank (10) and defrosting water tank (12)
Cold-trap is connected with defrosting water circulation pipe between (14).
2. the freeze dryer energy conserving system according to claim 1 using solar energy absorption type refrigeration, which is characterized in that described
Solar energy heating circulation loop be equipped with solar energy heating circulating pump (9).
3. the freeze dryer energy conserving system according to claim 1 using solar energy absorption type refrigeration, which is characterized in that described
Air conditioner afterheat recovering mechanism include air conditioner afterheat heat exchanger (19), air conditioner afterheat recovery pump (20) and be connected to air conditioner afterheat
Air conditioner afterheat between heat exchanger (19), condenser (2) and absorber (4) recycles circulation line, air conditioner afterheat recovery pump (20)
It is set on air conditioner afterheat recycling circulation line.
4. the freeze dryer energy conserving system according to claim 3 using solar energy absorption type refrigeration, which is characterized in that described
Defrosting water tank (12) be connected with air conditioner afterheat heat exchanger (19), the air conditioner afterheat recovery pump (20) both with air-conditioning more than
Heat exchanger (19) is connected, and is connected with defrosting water tank (12).
5. the freeze dryer energy conserving system according to claim 1 using solar energy absorption type refrigeration, which is characterized in that along Jie
Matter flow direction is equipped with UTILIZATION OF VESIDUAL HEAT IN from defrosting water tank (12) to the defrosting water circulation pipe between freeze dryer cold-trap (14)
Circulating pump (21) and defrosting valve (13), on from freeze dryer cold-trap (14) to the defrosting water circulation pipe between defrosting water tank (12)
Equipped with defrosting water recovery valve (17) and defrosting water recovery pump (18).
6. the freeze dryer energy conserving system according to claim 1 using solar energy absorption type refrigeration, which is characterized in that described
Defrosting water tank (12) at the top of be equipped with water tank overflow mouth (11).
7. the freeze dryer energy conserving system according to claim 1 using solar energy absorption type refrigeration, which is characterized in that described
Generator (1), condenser (2), evaporator (3) and the absorber (4) of absorption refrigeration unit pass sequentially through refrigerant line
Connection, and the refrigerant pipe road between condenser (2) and evaporator (3) is equipped with refrigerant throttle valve (5)；The generation
Between device (1) and absorber (4) be equipped with solution circulation line, along flow direction of medium, from generator (1) to absorber (4) it
Between solution circulation line be equipped with solution throttle valve (6), from absorber (4) to the solution circulation line between generator (1)
It is equipped with solution pump (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820937286.XU CN208504872U (en) | 2018-06-15 | 2018-06-15 | Utilize the freeze dryer energy conserving system of solar energy absorption type refrigeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820937286.XU CN208504872U (en) | 2018-06-15 | 2018-06-15 | Utilize the freeze dryer energy conserving system of solar energy absorption type refrigeration |
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| CN208504872U true CN208504872U (en) | 2019-02-15 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425827A (en) * | 2019-08-28 | 2019-11-08 | 上海盈达空调设备股份有限公司 | Lyophilization system based on recuperation of heat and photothermal technique |
| CN110455041A (en) * | 2019-08-28 | 2019-11-15 | 上海盈达空调设备股份有限公司 | Freeze-drying method based on recuperation of heat and photothermal technique |
| CN114923314A (en) * | 2022-03-07 | 2022-08-19 | 上海工程技术大学 | Freeze dryer energy-saving system utilizing solar energy and condensation heat |
-
2018
- 2018-06-15 CN CN201820937286.XU patent/CN208504872U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425827A (en) * | 2019-08-28 | 2019-11-08 | 上海盈达空调设备股份有限公司 | Lyophilization system based on recuperation of heat and photothermal technique |
| CN110455041A (en) * | 2019-08-28 | 2019-11-15 | 上海盈达空调设备股份有限公司 | Freeze-drying method based on recuperation of heat and photothermal technique |
| CN114923314A (en) * | 2022-03-07 | 2022-08-19 | 上海工程技术大学 | Freeze dryer energy-saving system utilizing solar energy and condensation heat |
| CN114923314B (en) * | 2022-03-07 | 2023-04-28 | 上海工程技术大学 | Freeze dryer energy-saving system utilizing solar energy and condensation heat |
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