CN208901523U - The energy-saving fresh freeze drying system of low dew-point air supply - Google Patents
The energy-saving fresh freeze drying system of low dew-point air supply Download PDFInfo
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- CN208901523U CN208901523U CN201920228304.1U CN201920228304U CN208901523U CN 208901523 U CN208901523 U CN 208901523U CN 201920228304 U CN201920228304 U CN 201920228304U CN 208901523 U CN208901523 U CN 208901523U
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Abstract
The utility model provides a kind of energy-saving fresh freeze drying system of low dew-point air supply.The system includes air-treatment unit, air conditioner cold water pipeline, refrigeration system and TT&C system.The three security protection technology measures that the utility model improves evaporating temperature by suitably increasing devaporizer number of rows, devaporizer antifrost automatic protection functions and automatic defrosting function are arranged; solves the safety issue of the freeze drying system frosting frozen block of low dew-point air supply; the air-supply dew-point temperature of freeze drying system can be made to reach 5 DEG C hereinafter, extending the application range of freeze drying technology.The condensing units of refrigeration system are used for reheating simultaneously, and condensing units amount is adjusted in heat again that can be as needed, has not only eliminated the thermal energy consumption again of freeze drying, but also condenser heat can be prevented and excessively recycle the problem of making the increase of air conditioner refrigerating energy consumption.The systematic difference can be such that investment, operation energy consumption and the expense of the fresh air dehumidifying system of low dew-point air supply is greatly reduced.
Description
Technical field
The utility model belongs to air conditioner dehumidification field, and in particular to one kind is able to achieve lower than 5 DEG C dew-point temperature air-supplies, condensations
The adjustable energy-saving fresh freeze drying system of recuperation of heat.
Background technique
In the production of space product, assembly, test and launch facility, high requirement is proposed to fresh air dehumidification, it is desirable that
Outdoor humid air is carried out depth dehumidifying by fresh air dehumidifying system, and air-supply dew-point temperature is made to reach 5~4 DEG C, previous this system
All use dehumidifying effect relatively strong and energy consumption and all higher rotary wheel dehumidifying mode of investment.Freeze drying is a kind of investment and energy consumption
It is all lower, in Air-conditioning Engineering widely applied dehumidification mode, but the dehumidifying effect of conventional freeze drying system is weaker, can not
It is lower than 5 DEG C of low dew-point air supply field applied to air-supply dew-point temperature, main problem is as follows:
1) there are the safety issues that frosting ice blocks up.Cool air to 5 DEG C hereinafter, refrigeration system devaporizer
Evaporating temperature typically need to be below 0 DEG C, the stifled problem of frosting ice is at this moment easy to appear on devaporizer, makes fresh air dehumidification system
System can not work normally, therefore conventional freeze drying system may be only available for the case where air-supply dew-point temperature is higher than 5 DEG C, in reality
In the engineering practice of border, it is usually applied to the case where air-supply dew-point temperature is higher than 8 DEG C.
2) there are problems that the high energy saving of reheating energy consumption.For depth dehumidifying, freeze drying system needs air is cooling
To very low temperature, after the dehumidification by condensation that cools down, since supply air temperature is too low, it is also necessary to use the heat sources such as electric heater by low temperature
Air is heated to suitable temperature, this results in cold-hot counteraction, increases considerably energy consumption.Especially in conditioning in Transition Season, low dew-point air supply
Freeze drying system need heat again it is larger, this problem is more serious.It is lower that this reduces freeze drying energy consumption significantly
Advantage.
The fresh air dehumidifying system of previous low dew-point air supply generallys use freeze drying+solution dehumidification or freeze drying+runner
The dehumanization method of dehumidifying.But compared with freeze drying method, both dehumanization methods are not only invested and are multiplied, but also run energy
Consumption and expense also increase considerably, therefore there is an urgent need to find a kind of new freeze drying method, solve the knot of low dew-point air supply
The problem of frost blocks up problem and reheating energy consumption is high, makes it not only be able to achieve low dew-point air supply but also is able to maintain lower energy consumption level.
Existing technical literature:
1) a kind of patent document (CN202927987U): double cold source depth dehumidifying fresh air conditioner system with condensing units
System.By condensation heat, all recycling is used for reheating to the freeze drying system, but since the reheating that fresh air freeze drying system needs is negative
Lotus be it is continually changing, by condensation heat all recycling be used to heat fresh air, this has certain energy-saving effect in conditioning in Transition Season, but in summer
Low temperature fresh air, which is sent into interior, can play cooling effect, therefore not need to reheat low temperature fresh air, at this moment by condensation heat
All recycling will increase the cooling load of air-conditioning system for reheating instead, increase considerably air conditioning energy consumption.Synthesis is examined
The case where considering summer and conditioning in Transition Season, energy-saving effect is had a greatly reduced quality, even not energy-efficient.In addition, the fresh air freeze drying system
System does not account for the antifrost technical measures of evaporator, and being not used to air-supply dew-point temperature, (corresponding air humidity content is about lower than 5 DEG C
The case where for 5.4g/kg).
2) a kind of patent document (CN205227615U): fresh air dehumidification unit with condensing units.The cooled dehumidifier unit
Group is provided with two airflow channels of fresh air and air draft, is used to cool down refrigerant liquid for the remaining cold recovery of indoor exhaust wind, and will
Condensing units are adjustable for fresh air reheating, then heat.The freeze drying system does not account for the antifrost of evaporator yet
Technical measures are not used to the case where air-supply dew-point temperature is lower than 5 DEG C.In addition, the unit is not suitable for indoor not air draft
Situation, such as the fresh air dehumidifying system of clean room.
Utility model content
(1) technical problems to be solved.
The investment of freeze drying method and energy consumption are lower, but when dew-point temperature of blowing is lower than 5 DEG C, are easy to appear evaporator
The stifled problem of frosting ice, can not work normally fresh air dehumidifying system.In addition, the cooling temperature of low dew point freeze drying is lower,
The reheating heating amount and energy consumption needed is larger, thus by freeze drying method be applied to low dew-point air supply the case where, just it is necessary
Solve the problems, such as the safety issue of evaporimeter frosting frozen block and the energy saving that reheating energy consumption is high.
(2) technological means taken
The utility model provides a kind of energy-saving fresh freeze drying system that can be achieved to blow lower than 5 DEG C of dew-point temperatures
System comprising air-treatment unit, air conditioner cold water pipeline, refrigeration system and the TT&C system being connected to each other, wherein this is new
Air-cooled jelly dehumidification system uses two-stage freeze drying, and air-supply dew-point temperature is lower than 5 DEG C, wherein the two-stage freeze drying includes
It the chilled water cooling and dehumidifying that is carried out of air conditioning water that is provided using air conditioner cold water pipeline and is carried out using refrigeration system
Direct-expansion type freeze drying.Wherein, the air-treatment unit include new air-valve, low efficient filter, surface air cooler, devaporizer,
Blower and condensation heat recoverer and cabinet, air conditioner cold water pipeline include the air conditioner cold water water supply adapter tube and air-conditioning connecting with surface air cooler
Air conditioner cold water water supply adapter tube and hand-operated valve and electric control valve on air conditioner cold water connecting is arranged in cold-water return adapter tube.
Wherein, the TT&C system is responsible for the parameter measurement, automatic control and automatic protection of system.The surface air cooler includes first order table
Cooler and second level surface air cooler, the number of rows of two surface air coolers are no less than 8 rows.The chilled water supply water temperature of the surface air cooler is not high
In 7 DEG C, outlet air temperature maintains 11 DEG C to 13 DEG C.
For devaporizer antifrost frozen block problem, following three protection technique measures are taken:
1) number of rows of devaporizer is increased.Specifically, the number of rows of the devaporizer is at least 12 rows, to reduce
The evaporating temperature of design conditions is increased to 1 DEG C or more by heat transfer temperature difference, and in the case where normal work, devaporizer will not
There is the problem of frosting frozen block.
2) devaporizer antifrost automatic protection functions are provided with.Specifically, temperature is set on devaporizer surface
Sensor, when devaporizer surface temperature is lower than 0.5 DEG C, TT&C system reduces the running frequency of refrigeration compressor automatically,
Reducing semen donors, (refrigeration compressor is frequency-changeable compressor, is adjusted by variable frequency adjustment to the refrigerating capacity of refrigeration system
Section), evaporating temperature is improved, the appearance of frost is prevented.
3) it is provided with automatic defrosting function.The pressure difference of devaporizer inlet and outlet air-flow is monitored, when pressure difference is excessive
When, show devaporizer frosting frozen block, the blower and new air-valve of fresh air dehumidifying system is at this moment automatically closed, using hot gas
Defrosting method carries out defrosting.Specifically, when the pressure difference of devaporizer inlet and outlet air-flow is greater than 300Pa, TT&C system is closed new
The blower and new air-valve of wind dehumidification system simultaneously carry out defrosting.
For the problem that heat is big, reheating energy consumption is high again existing for low dew point freeze drying, takes and return system waste heat
Receive the energy conservation measure for being used for reheating.The condensation heat of refrigeration system is waste heat in the system, is discharged by outdoor condenser in the past
The condensing units of refrigeration system are used for reheating by outdoor, the system, and refrigeration system is connected to two condensers: one of them sets
It sets in fresh air dehumidification unit behind devaporizer, condensing units is used for the reheating of freeze drying system, to eliminate
Thermal energy consumption again；Another is outdoor air-cooled condenser, extra condensation heat is discharged outdoor.It is adjustable by electric T-shaped valve
The refrigerant flow ratio of two condensers makes it meet reheating heating amount so that the condenser heat to recycling is adjusted
It is required that and do not generate excessive reheating, reach optimal energy-saving effect, the energy consumption of fresh air freeze drying unit is greatly reduced.
(3) beneficial effect of technical solution
The utility model solves the safety of the devaporizer frosting frozen block of the freeze drying system of low dew-point air supply
Problem can make the air-supply dew-point temperature of freeze drying system reach 5 DEG C hereinafter, extending the application range of freeze drying technology.
Condensing units are used for reheating, eliminate thermal energy consumption again, and heat again that can be as needed adjusts condensing units amount
Section, avoid the occurrence of the problem of excessive reheating increases air conditioning energy consumption, make low dew point fresh air freeze drying system operation energy consumption and
Expense is greatly reduced.The system can be applied to the factory, assembly workshop and space launching site test workshop of space product
Air conditioning and cleaning system, substitute previous common investment, energy consumption and all higher dehumidification system for runner of operating cost, make air-conditioning system
Primary investment, operation energy consumption and the expense of system are greatly reduced, and can produce significant energy-saving and emission-reduction benefit and economic benefit.For
The coastal space launching site and marine launching site, test workshop whole year having a humid climate require to dehumidify, therefore practical using this
Novel energy-saving benefit and economic benefit is more significant.
Detailed description of the invention
Fig. 1 is the system module composition figure of the utility model；
Fig. 2 is the system flow chart of the utility model.
Appended drawing reference:
1, air-treatment unit:
11, air-treatment unit cabinet；12, fresh inlet electric switching valve；13, low efficient filter；14, first order table is cold
Device；15, second level surface air cooler；16, devaporizer；17, centrifugal blower；18, condensation heat recoverer；
2, air conditioner cold water pipeline:
21, air conditioner cold water feed water valve (1)；22, air conditioner cold water back-water valve (BWV) (1)；23, air conditioner cold water feed water valve (2)；24, empty
It adjusts cold-water return valve (2)；25, air conditioner cold water, which supplies water, takes over；26, air conditioner cold water connecting；27, air conditioner cold water, which supplies water, is adjusted
Valve；
3, refrigeration system:
31, refrigeration compressor；32, expansion valve；33, freeze outlet three-way control valve；34, outdoor condenser；
4, TT&C system:
41, control cabinet；42, fresh air inlet Temperature Humidity Sensor；43, surface air cooler outlet temperature sensor；44, evaporation cooling
Device surface temperature sensor；45, outlet temperature for evaporation cooler sensor；46, air-supply Temperature Humidity Sensor；47, evaporation cooling
Device differential pressure pickup.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.This specific embodiment is only practical new to this
The explanation of type is not limitations of the present invention.It, might not about the means according to the present utility model solved the problems, such as
The whole combinations for the various aspects for needing to be described according to following embodiments.Based on the embodiments of the present invention, art technology
Personnel's every other embodiment obtained without making creative work belongs to the model of the utility model protection
It encloses.
It is applied below in the air conditioner dehumidification of a test workshop as embodiment, referring to Figures 1 and 2 in detail using the utility model
Illustrate the fresh air dehumidifying system of the utility model.The fresh air dehumidifying system of the utility model is using chilled water cooling and dehumidifying and straight swollen
The two-stage freeze drying of formula freeze drying, as shown in Fig. 1, including air-treatment unit, the air-conditioning being connect with air-treatment unit
Cold water pipeline, refrigeration system (such as air-cooled direct-expansion type refrigeration system) and for system is monitored, is automatically controlled and from
Four parts of TT&C system of dynamic protection.
Specifically, as shown in Fig. 2, air-treatment unit 1 mainly includes air-treatment unit cabinet 11, fresh inlet electricity
Dynamic switch valve 12, low efficient filter 13, surface air cooler (14,15), devaporizer 16, blower (such as centrifugal blower 17) and condensation
Heat regenerator 18.The above-mentioned component 12-18 of air-treatment unit 1 can be sequentially arranged in cabinet 11 by fresh air flow direction.
In the identical situation of moisture removal, it is cold that the investment of chilled water cooling and dehumidifying mode and energy consumption are substantially lower than direct-expansion type
Freeze dehumidification mode, therefore the embodiments of the present invention are provided with first order surface air cooler 14 and surface air cooler 15 two tables in the second level are cold
Device, the number of rows of each surface air cooler are no less than 8 rows, this can increase substantially the cooling and dehumidifying effect of surface air cooler, make big in fresh air
Partial moisture (80% or more) is removed in surface air cooler, and the freeze drying amount of devaporizer is greatly reduced, makes direct-expansion type
Freeze drying mode is greatly reduced except humidity load, so that the investment of fresh air dehumidifying system and energy consumption be made to be greatly reduced.Table
The cold source of cooler is the extraneous air conditioning water provided, usually 7 DEG C of water supply, 12 DEG C of return water.
Air conditioner cold water pipeline 2 mainly includes that the air conditioner cold water water supply adapter tube connecting with surface air cooler and air conditioner cold water return water connect
It manages, the hand-operated valve that air conditioner cold water supplies water on adapter tube and air conditioner cold water connecting is set.Specifically, air conditioner cold water feed water valve 21
It is arranged on the water supply adapter tube and connecting for being connected to first order surface air cooler 14 with air conditioner cold water back-water valve (BWV) 22, with control to the
The water supply of level-one surface air cooler 14 and return water.Air conditioner cold water feed water valve 23 and the setting of air conditioner cold water back-water valve (BWV) 24 are being connected to the second level
On the water supply adapter tube and connecting of surface air cooler 15, to control water supply and the return water to second level surface air cooler 15.
Air-cooled direct-expansion type refrigeration system 3, which specifically includes that, is arranged in outdoor refrigeration compressor 31, refrigeration outlet threeway adjusting
Valve 32, outdoor condenser 33 and expansion valve 34, and it is cold by refrigerant air-liquid connecting pipe and the evaporation in air-treatment unit
But device 16 and condensation heat recoverer 18 form refrigeration cycle.The air that devaporizer 16 exports second level surface air cooler 15
Further cool down dehumidification by condensation.The Cryogenic air that 18 recovering condensing heat of condensation heat recoverer exports devaporizer 16 adds
Heat.Extra condensation heat is discharged to outdoor by outdoor condenser 33.
The outlet three-way control valve 32 that freezes adjusts the flow distribution of refrigerant of condensation heat recoverer 18 and outdoor condenser 33,
Keep condenser heat and the heat demand amount again of recycling almost the same, excessive reheating is avoided to increase workshop building air conditioner cooling load and energy consumption
Add.
TT&C system 4 specifically includes that control cabinet 41, is arranged at fresh air inlet fresh air inlet Temperature Humidity Sensor 42,
Be arranged surface air cooler (such as second level surface air cooler) exit surface air cooler outlet temperature sensor 43, be arranged in devaporizer
The devaporizer surface temperature sensor 44 on surface, the outlet temperature for evaporation cooler that devaporizer exit is set
Sensor 45, the air-supply Temperature Humidity Sensor 46 that fresh air exit is set, for measure devaporizer inlet and outlet side pressure it is poor
Devaporizer differential pressure pickup 47.4 major function of TT&C system includes system principal states parameter detecting display function, ginseng
Number automatic control function, antifrost Automatic monitoring and protection function, automatic defrosting defencive function etc..
[the air dewetting processing method of the fresh air dehumidifying system of the utility model]
The air dewetting processing method of this system: the fresh air of outdoor high temperature high humidity first passes around the filtering of low efficient filter 13,
Remove biggish dust particle in outdoor air；Then 12 are cooled to by first order surface air cooler 14 and second level surface air cooler 15
DEG C hereinafter, remove air in most of moisture；It further cools subsequently into devaporizer 16 to 5 DEG C or less (3~5
DEG C), the moisture in air makes the dew-point temperature of air reach 5 DEG C or less by further condensation removal；Cryogenic air enters centrifugation
Blower 17 enters condensation heat recoverer 18 after being pressurized, and recycles the condensation heat of refrigeration system for reheating, improves supply air temperature, real
Waste Heat Reuse is showed, has eliminated thermal energy consumption again, has enabled the system to consumption and be greatly reduced.
Centrifugal blower 17 is arranged behind devaporizer 16, it is possible to reduce cooling system load and energy consumption, fever
Amount gets into the air, and can also play certain reheating effect, reduces reheating energy consumption.Centrifugal blower 17 is that frequency conversion is centrifuged wind
Machine is adapted to the demand that test workshop fresh air volume is adjusted, and when fresh air volume demand is reduced, can reduce its running frequency, make
Fan energy consumption is reduced.
The number of rows of devaporizer 16 is increased to 12 rows or more, to reduce its heat transfer temperature difference, improves design conditions
Evaporating temperature is to 1 DEG C or more, to prevent it from the problem of frosting frozen block occur.
TT&C system is provided with devaporizer antifrost monitoring and protecting function.When devaporizer surface temperature 44 is lower than
At 0.5 DEG C, the automatic running frequency for reducing refrigeration compressor 31 reduces semen donors, improves evaporating pressure, propose evaporating temperature
Height, to prevent the appearance of frost.
TT&C system is provided with the automatic protection functions of automatic defrosting.Devaporizer inlet outlet pressure differential is monitored,
When pressure difference is excessive, show devaporizer frosting, 17 He of centrifugal blower of air-treatment unit is at this moment automatically closed
Fresh air electric switching valve 12, direct-expansion type refrigeration system carry out defrosting using hot gas defrosting method.
The refrigeration compressor 31 of air-cooled direct-expansion type refrigeration unit is frequency-changeable compressor, can be to refrigeration by variable frequency adjustment
The refrigerating capacity of system is adjusted, and realizes the adjusting to system dehumidification amount, while providing for devaporizer antifrost defencive function
Technological means.
Electric switching valve 12 is set in the fresh air inlet of air-treatment unit, the valve is closed in system closedown, is prevented
Outdoor humid air enters the room, to keep the drying regime of workshop room air.
According to the signal of surface air cooler outlet temperature sensor 43, air conditioner cold water is carried out automatically controlling for water regulating valve 27,
It turns down, opened higher than 12 DEG C greatly lower than 12 DEG C, surface air cooler outlet temperature is made to maintain 11 DEG C -13 DEG C, be the target of control with 12 DEG C
Value.
The adjusting method of system dehumidification amount: when system air-supply dew-point temperature is lower than setting value, refrigeration compressor 31 is turned down
Running frequency；When system air-supply dew-point temperature is higher than setting value, the running frequency of refrigeration compressor 31 is tuned up.
The adjusting method of system supply air temperature: when system supply air temperature is lower than setting value, big refrigeration outlet threeway tune is opened
Valve 32 is saved, the flow rate of refrigerant gas for flowing to condensation heat recoverer 18 is increased；When system supply air temperature is higher than setting value, turn down
Freeze outlet three-way control valve 32, reduces the flow rate of refrigerant gas for flowing to condensation heat recoverer 18.
In conclusion fresh air dehumidifying system according to the present utility model and its dehumanization method, solve low dew-point air supply
The safety issue of the devaporizer frosting frozen block of freeze drying system, can be such that the air-supply dew-point temperature of freeze drying system reaches
To 5 DEG C hereinafter, extending the application range of freeze drying technology, the investment of low dew point fresh air dehumidifying system is greatly reduced.
Condensing units are used for reheating, eliminate thermal energy consumption again, and heat again that can be as needed adjusts condensing units amount
Section keeps the condenser heat of recycling and heat demand amount again almost the same, excessive reheating is avoided to make workshop building air conditioner cooling load and energy consumption
Increase, so that the operation energy consumption of low dew point fresh air freeze drying system and expense be made to be greatly reduced.
Although the utility model is described referring to exemplary embodiment above, above-described embodiment is only to illustrate
The technical ideas and features of the present invention do not limit the protection scope of the present invention.It is all practical new according to this
Any equivalent variations or modification that type Spirit Essence is made, should be covered within the scope of the utility model.
Claims (10)
1. a kind of energy-saving fresh freeze drying system of low dew-point air supply, which is characterized in that it includes the air being connected to each other
Unit, air conditioner cold water pipeline, refrigeration system and TT&C system are handled, which is removed using two-stage freezing
It is wet, wherein the freezing water cooling that the two-stage freeze drying is carried out including the use of the air conditioning water that air conditioner cold water pipeline provides
But the direct-expansion type freeze drying for dehumidifying and being carried out using refrigeration system,
Wherein, the air-treatment unit includes devaporizer, and the TT&C system includes for cold to the evaporation
But the devaporizer differential pressure pickup that the pressure difference of device inlet and outlet air-flow is monitored.
2. fresh air freeze drying system according to claim 1, wherein the air-treatment unit further include: cabinet, with
And it is arranged in the intracorporal new air-valve of case, low efficient filter, surface air cooler, blower, condensation heat recoverer, the fresh air freeze drying system
Air-supply dew-point temperature be lower than 5 DEG C.
3. fresh air freeze drying system according to claim 2, wherein the air conditioner cold water pipeline includes connecting with surface air cooler
The air conditioner cold water connect supplies water to take over and connect with air conditioner cold water connecting, setting in air conditioner cold water water supply adapter tube and air conditioner cold water return water
Hand-operated valve and electric control valve on pipe.
4. fresh air freeze drying system according to claim 2, wherein when the pressure difference of devaporizer inlet and outlet air-flow is big
When 300Pa, the TT&C system closes the blower and new air-valve of air-treatment unit, and carries out defrosting.
5. fresh air freeze drying system according to claim 2, wherein the refrigeration system includes being arranged in outdoor system
Cold compressor, refrigeration outlet three-way control valve, outdoor condenser and expansion valve, refrigeration compressor, refrigeration outlet three-way control valve,
Outdoor condenser and expansion valve are returned by the devaporizer and condensation heat of refrigerant air-liquid connecting pipe and air-treatment unit
It receives device and forms refrigeration cycle.
6. fresh air freeze drying system according to claim 2, wherein the surface air cooler includes first order surface air cooler and
Second level surface air cooler, the number of rows of each surface air cooler are no less than 8 rows.
7. fresh air freeze drying system according to claim 2, wherein the number of rows of the devaporizer is at least 12
Row, so that the evaporating temperature of the devaporizer design conditions is at 1 DEG C or more.
8. fresh air freeze drying system according to claim 5, wherein the refrigeration compressor is frequency-changeable compressor, is led to
Variable frequency adjustment realization is crossed to adjust the refrigerating capacity of refrigeration system.
9. fresh air freeze drying system according to claim 2, wherein the chilled water supply water temperature of the surface air cooler is not high
In 7 DEG C, outlet air temperature maintains 11 DEG C to 13 DEG C.
10. fresh air freeze drying system according to claim 5, wherein the TT&C system includes that devaporizer is anti-
Frosting automatic protection functions are provided with temperature sensor on devaporizer surface, wherein when devaporizer surface temperature is low
When 0.5 DEG C, the automatic running frequency for reducing refrigeration compressor reduces semen donors, improves evaporating temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920228304.1U CN208901523U (en) | 2019-02-20 | 2019-02-20 | The energy-saving fresh freeze drying system of low dew-point air supply |
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| CN201920228304.1U CN208901523U (en) | 2019-02-20 | 2019-02-20 | The energy-saving fresh freeze drying system of low dew-point air supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109724175A (en) * | 2019-02-20 | 2019-05-07 | 中国人民解放军63921部队 | The energy-saving fresh freeze drying system of low dew-point air supply |
| CN113028531A (en) * | 2021-03-15 | 2021-06-25 | 苏州热工研究院有限公司 | Energy-saving environment-friendly central air-conditioning system |
| CN117167884A (en) * | 2023-10-08 | 2023-12-05 | 杭州泰龙净化设备工程有限公司 | Air treatment device and method for workshop |
-
2019
- 2019-02-20 CN CN201920228304.1U patent/CN208901523U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109724175A (en) * | 2019-02-20 | 2019-05-07 | 中国人民解放军63921部队 | The energy-saving fresh freeze drying system of low dew-point air supply |
| CN113028531A (en) * | 2021-03-15 | 2021-06-25 | 苏州热工研究院有限公司 | Energy-saving environment-friendly central air-conditioning system |
| CN117167884A (en) * | 2023-10-08 | 2023-12-05 | 杭州泰龙净化设备工程有限公司 | Air treatment device and method for workshop |
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