CN207146964U - A kind of refrigeration system - Google Patents
A kind of refrigeration system Download PDFInfo
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- CN207146964U CN207146964U CN201720818057.1U CN201720818057U CN207146964U CN 207146964 U CN207146964 U CN 207146964U CN 201720818057 U CN201720818057 U CN 201720818057U CN 207146964 U CN207146964 U CN 207146964U
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- high temperature
- cryogenic
- temperature
- evaporator
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Abstract
The utility model discloses a kind of refrigeration system, belong to technical field of refrigeration equipment.The system includes：High-temperature circuit includes high temperature compressor, high temperature oil eliminator, condenser, high temperature drying filter, high temperature regenerator, high temperature expansion valve and condenser/evaporator, low-temperature circuit includes cryogenic compressor, low temperature oil separating structure, heat exchanger, low temperature drying filter, cryogenic regenerator, low-temperature expansion valve and evaporator, it is provided with high temperature energy regulation between the evaporation tube import of condenser/evaporator and evaporation tube outlet to bypass, high temperature energy regulation bypass is provided with high temperature energy regulating valve and air and liquid mixer；Cryogenic energy regulation bypass is provided between the condenser pipe import of the air entry and condenser/evaporator 16 of cryogenic compressor, cryogenic energy regulation bypass is provided with cryogenic energy regulating valve, in parallel on pipeline between the air entry of cryogenic compressor and the gas outlet of cryogenic regenerator to be provided with Buffer bypass, Buffer bypass is provided with expansion vessel.
Description
Technical field
The utility model belongs to technical field of refrigeration equipment, more particularly to a kind of refrigeration system, more particularly to a kind of
R404A/R23 cascade refrigeration systems.
Background technology
Commercial cascade refrigeration unit is widely used in production, processing, storing and the sales section of agricultural byproducts, in food
Keep the quality and freshness, avoid or reduce food in intermediate links loss, to ensure that food security etc. plays the role of important.Modern Supermarket
The refrigeration of big volume, the refrigeration of freezer and large area, freezing displaying sales territory are all had, large, medium and small type loglstics enterprise is all built
There are refrigeration of the thousands of tons of to few hundred thousand tonnes of, freezer, refrigeration, the job shop of freezing and storage are all had in modern food processing enterprise
Warehousing.With the fast development of China's economic and the propulsion of urbanization, the demand rapid growth of commercial cascade refrigeration unit.Mesh
Before, the manufacture level of China's commercial refrigeration unit falls behind relatively with respect to USA and Europe Deng developed countries, is mainly reflected in energy-conservation, environment
Protection and reliability etc..
Existing cascade refrigeration refrigeration machine is generally made up of two parts：High-temperature circuit and low-temperature circuit, in high-temperature circuit
Freezing machine condense, and only low-temperature circuit condensing agent evaporation when just produce cold.Pass through between high-temperature circuit and low-temperature circuit
One Condensation-Evaporator connects, and it is both the evaporator of high-temperature circuit, is the condenser of low-temperature circuit again.
For existing cascade refrigeration refrigeration machine generally use R22/R13 as refrigerant, there is problems with it：
1st, R22/R13 is not environment friendly refrigerating fluid；
2nd, refrigerant operationally, influenceed by the change of use condition and the change of operating mode, it is necessary to displacement can not
Adaptively change；
3rd, when existing cascade refrigeration machine shuts down, because the temperature in system is increased to environment temperature, cryogenic refrigeration
Agent is all gasificated into superheated steam, it is likely that can be higher than defined maximum working pressure (MWP), make system in the hole.
Utility model content
In order to solve the above problems, the utility model embodiment provides a kind of refrigeration system, and the system uses environment-friendly type
Refrigerant and to structure carry out adaptation.The technical scheme is as follows：
The utility model embodiment provides a kind of refrigeration system, and the system includes high-temperature circuit and low-temperature circuit；
Wherein, the high-temperature circuit includes the high temperature compressor 10, high temperature oil eliminator 11, condenser connected by pipeline
12nd, high temperature drying filter 13, high temperature regenerator 14, high temperature expansion valve 15 and Condensation-Evaporator 16, the high temperature compressor 10
Exhaust outlet output refrigerant successively through high temperature oil eliminator 11, condenser 12, high temperature drying filter 13, high temperature regenerator
14th, high temperature expansion valve 15 to Condensation-Evaporator 16 is evaporated, the suction after evaporation through high temperature regenerator 14 to high temperature compressor 10
Gas port.
Wherein, the low-temperature circuit includes the cryogenic compressor 20, low temperature oil separating structure 21, heat exchange connected by pipeline
Device 22, low temperature drying filter 23, cryogenic regenerator 24, low-temperature expansion valve 25 and evaporator 26, the cryogenic compressor 20
The refrigerant of exhaust outlet output is condensed through low temperature oil separating structure 21, heat exchanger 22 to Condensation-Evaporator 16 successively, is condensed
It is evaporated by low temperature drying filter 23, cryogenic regenerator 24 and low-temperature expansion valve 25 to evaporator 26, through low after evaporation
Warm regenerator 24 to cryogenic compressor 20 air entry.
Wherein, it is other that high temperature energy regulation is provided between the evaporation tube import of the Condensation-Evaporator 16 and evaporation tube outlet
Road, the high temperature energy regulation bypass are provided with high temperature energy regulating valve 17 and air and liquid mixer 18；The cryogenic compressor 20
Air entry and Condensation-Evaporator 16 condenser pipe import between be provided with cryogenic energy regulation and bypass, cryogenic energy regulation
Bypass is provided with cryogenic energy regulating valve 29, between the air entry of the cryogenic compressor 20 and the gas outlet of cryogenic regenerator 24
Pipeline on it is in parallel be provided with Buffer bypass, the Buffer bypass is provided with expansion vessel 27；The cryogenic compressor 20 is hydrojet
Cooled compressor and its hydrojet entrance is connected by hydrojet pipeline with the liquid outlet of cryogenic regenerator 24.
Preferably, the low temperature oil separating structure 21 in the utility model embodiment is by two high-efficiency oil separator series connection groups
Into.
Wherein, the condenser 12 in the utility model embodiment is air-cooled condenser, and the heat exchanger 22 exchanges heat for water cooling
Device.
Preferably, the high-temperature circuit in the utility model embodiment is filled with R404A refrigerants, the low-temperature circuit filling
There are R23 refrigerants.
Wherein, the high-temperature circuit in the utility model embodiment specifically includes：Exhaust outlet, the height of the high temperature compressor 10
Warm oil eliminator 11, condenser 12, the inlet of high temperature drying filter 13 and high temperature regenerator 14 are sequentially connected by pipeline,
The evaporation tube import of the liquid outlet of the high temperature regenerator 14, high temperature expansion valve 15 and Condensation-Evaporator 16 by pipeline successively
Connection, the evaporation tube outlet of the Condensation-Evaporator 16 divide two-way to export, and the air inlet of a pipeline and high temperature regenerator 14 connects
Connect, another pipeline be connected with the evaporation tube import of Condensation-Evaporator 16 and be sequentially provided with high temperature energy regulating valve 17 thereon and
Air and liquid mixer 18, the gas outlet of the high temperature regenerator 14 are connected by pipeline with the air entry of high temperature compressor 10.
Wherein, the low-temperature circuit in the utility model embodiment specifically includes：It is the exhaust outlet of the cryogenic compressor 20, low
The condenser pipe import of warm oil separating structure 21, heat exchanger 22 and Condensation-Evaporator 16 is sequentially connected by pipeline, and the condensation-
The condenser pipe outlet of evaporator 16, the inlet of low temperature drying filter 23 and cryogenic regenerator 24 are sequentially connected by pipeline,
The liquid outlet of the cryogenic regenerator 24 divides two-way to export, and a pipeline is connected with the hydrojet entrance of cryogenic compressor 20, another
Bar pipeline is connected with the import of evaporator 26 and which is provided with low-temperature expansion valve 25, the outlet of the evaporator 26 by pipeline with
The air inlet connection of cryogenic regenerator 24, leads between the gas outlet of the cryogenic regenerator 24 and the air entry of cryogenic compressor 20
Cross pipeline connection and the Buffer bypass with expansion vessel 27, the condenser pipe of the Condensation-Evaporator 16 are also associated between it
Import is connected by the pipeline with cryogenic energy regulating valve 29 with the air entry of cryogenic compressor 20.
The beneficial effect brought of technical scheme that the utility model embodiment provides is：The utility model embodiment provides
A kind of refrigeration system, the System Priority consider Environmental Factors, as far as possible from the refrigerant of environmental protection, can somewhat sacrifice refrigeration performance.
Because new refrigerant evaporating temperature is relatively low, the utility model considers problem of oil return, cold regulation problem, expansion vessel comprehensively
Design a series of problems, such as.Obtain using environmental protection refrigerant and less than -60 DEG C of refrigeration system can be cooled to.
Brief description of the drawings
Fig. 1 is the theory diagram for the refrigeration system that the utility model embodiment provides.
In figure：10 high temperature compressors, 11 high temperature oil eliminators, 12 condensers, 13 high temperature drying filters, 14 high temperature backheats
It is device, 15 high temperature expansion valves, 16 Condensation-Evaporators, 17 high temperature energy regulating valves, 18 air and liquid mixers, 20 cryogenic compressors, 21 low
Warm oil separating structure, 22 heat exchangers, 23 low temperature drying filters, 24 cryogenic regenerators, 25 low-temperature expansion valves, 26 evaporators, 27
Expansion vessel, 28 cushioning control valves, 29 cryogenic energy regulating valves.
Embodiment
It is new to this practicality below in conjunction with accompanying drawing to make the purpose of this utility model, technical scheme and advantage clearer
Type is described in further detail.
Referring to Fig. 1, the utility model embodiment provides a kind of refrigeration system, and the system includes high-temperature circuit and low temperature returns
Road, heat exchange is carried out by Condensation-Evaporator 16 between high-temperature circuit and low-temperature circuit.
Wherein, the high-temperature circuit in the present embodiment includes high temperature compressor 10, the high temperature oil eliminator connected by pipeline
11st, condenser 12, high temperature drying filter 13, high temperature regenerator 14, high temperature expansion valve 15 and Condensation-Evaporator 16 etc., high temperature
The refrigerant of the exhaust outlet output of compressor 10 is successively through high temperature oil eliminator 11, condenser 12, high temperature drying filter 13, height
Warm regenerator 14, high temperature expansion valve 15 to Condensation-Evaporator 16 are evaporated, through high temperature regenerator 14 to high temperature compressed after evaporation
The air entry of machine 10.Wherein, medium temperature refrigerant is filled with high-temperature circuit.
Wherein, the low-temperature circuit in the present embodiment includes cryogenic compressor 20, the low-temperature oil separation knot connected by pipeline
Structure 21, heat exchanger 22, low temperature drying filter 23, cryogenic regenerator 24, low-temperature expansion valve 25 and evaporator 26 etc., low temperature compression
The refrigerant of the exhaust outlet output of machine 20 carries out cold through low temperature oil separating structure 21, heat exchanger 22 to Condensation-Evaporator 16 successively
It is solidifying, it is evaporated, evaporates through low temperature drying filter 23, cryogenic regenerator 24 and low-temperature expansion valve 25 to evaporator 26 after condensation
Air entry by cryogenic regenerator 24 to cryogenic compressor 20.Wherein, it is filled with low-temperature refrigerant in low-temperature circuit.
Wherein, the high temperature compressor 10 in the present embodiment and cryogenic compressor 20 are piston compressor, in order to avoid negative
Lotus changes and stagnant liquid phenomenon occurs when starting, it usually needs configuration gas-liquid separator, and made in the present embodiment by regenerator
With the use that can avoid gas-liquid separator.
Further, it is provided with height between the evaporation tube import of the Condensation-Evaporator 16 in the present embodiment and evaporation tube outlet
Warm energy adjustment bypasses the load for adjusting high-temperature circuit, and high temperature energy regulation bypass is provided with the He of high temperature energy regulating valve 17
Air and liquid mixer 18.Cryogenic energy is provided between the condenser pipe import of the air entry and Condensation-Evaporator 16 of cryogenic compressor 20
Regulation bypass is used for the load for adjusting low-temperature circuit, and cryogenic energy regulation bypass is provided with cryogenic energy regulating valve 29.Low temperature pressure
It is in parallel on pipeline between the air entry of contracting machine 20 and the gas outlet of cryogenic regenerator 24 to be used for low-temperature circuit provided with Buffer bypass
Superheated steam buffering, Buffer bypass is provided with expansion vessel 27.Cryogenic compressor 20 is liquid injection cooling type compressor and its spray
Liquid entrance is connected to cool down cryogenic compressor 20 by the liquid outlet of hydrojet pipeline and cryogenic regenerator 24.
Wherein, capacity adjusting valve is substantially constant pressure valve after a kind of valve, when the reduction of refrigerating plant thermic load, compressor air suction
Pressure is dropped to when pre-setting value, and capacity adjusting valve is opened, and pressure of inspiration(Pi) is bigger, and the aperture of valve is bigger, and refrigerant is from exhaust
Side bypass amount is also more, slows down drop of suction pressure speed.System high temperature loop using hot-gas bypass to expansion valve with it is cold
Regulating valve between solidifying-evaporator, the hot gas of bypass after an air and liquid mixer mixing by entering Condensation-Evaporator, quite
One " virtual load " is provided for Condensation-Evaporator in hot gas, reaches the purpose that Reduction of Students' Study Load carries, while although actual load is relatively low,
Expansion valve remains to liquid supply rate abundance of the control to Condensation-Evaporator, to ensure to have enough cold-producing medium streams in Condensation-Evaporator
Speed, be not in oil return difficulty.Low-temperature circuit employs hot-gas bypass to the energy of the exhaust side of compressor because temperature is relatively low
Regulating valve changes the method for effective capacity of compressor, using this energy adjustment mode, suction superheat can be caused, it is necessary to
Liquid injection cooling is carried out to compressor.
Wherein, when the system shuts down, because the temperature in system is increased to environment temperature, low-temperature refrigerant whole gas
Superheated steam is melted into, then can be higher than defined maximum working pressure (MWP), such case does not allow.Therefore will be in low-temperature circuit
An expansion vessel is accessed, expansion vessel can be connected on the air intake duct of compressor, can also be connected on blast pipe, be connected to air intake duct
On container volume it is small compared with the container volume being connected on blast pipe and more reasonable.Specifically, the volume of expansion vessel is：
Wherein, Vd is when disregarding expansion vessel volume, the refrigeration system total measurement (volume) (m3) of low temperature part, vp is design temperature
Low temperature loop refrigerant overheated gas specific volume (m under degree, design pressure3/ kg), vdFor low-temperature circuit under design temperature, pressure of inspiration(Pi)
Refrigerant superheat gas specific volume (m3/ kg), GdDuring to disregard expansion vessel volume, low temperature loop refrigerant charging amount (kg).
Preferably, in low-temperature circuit, lubricating oil is easily separated and condensed from refrigerant, can block expansion valve, heat exchanger,
Also the heat exchange of evaporator can be influenceed, so oil gas should be completely separated as much as possible.Referring to Fig. 1, in the utility model embodiment
Low temperature oil separating structure 21 be composed in series by two high-efficiency oil separators.
Wherein, the condenser 12 in the utility model embodiment is air-cooled condenser, and heat exchanger 22 is water cooling heat exchanger (plate
Formula).
Preferably, the high-temperature circuit in the utility model embodiment is filled with R404A refrigerants, and low-temperature circuit is filled with
R23 refrigerants.Specifically, R404A is mixed by R125, R143a and R134a, and normal boiling point is -46.6 DEG C, ODP and CLP
Value is zero, nontoxic, safe, GWP value 4540.Relative to R22, its refrigerating capacity can be slightly larger but it consumes power increase very
It is more.R23 normal boiling points are -82.1 DEG C, ODP and CLP values are zero, nontoxic, safe, GWP value 14800.Being computed this is
Medium temperature (the T of systemm) it is -33 DEG C, heat transfer temperature difference is not more than 5 DEG C.
Wherein, referring to Fig. 1, the high-temperature circuit in the utility model embodiment specifically includes：The exhaust of high temperature compressor 10
The inlet of mouth, high temperature oil eliminator 11, condenser 12, high temperature drying filter 13 and high temperature regenerator 14 by pipeline successively
Connection, the evaporation tube import of the liquid outlet of high temperature regenerator 14, high temperature expansion valve 15 and Condensation-Evaporator 16 by pipeline successively
Connection, the evaporation tube outlet of Condensation-Evaporator 16 divide two-way to export, and a pipeline is connected with the air inlet of high temperature regenerator 14,
Another pipeline (high temperature energy regulation bypass) is connected with the evaporation tube import of Condensation-Evaporator 16 and is sequentially provided with high temperature thereon
Capacity adjusting valve 17 and air and liquid mixer 18, the gas outlet of high temperature regenerator 14 pass through pipeline and the air entry of high temperature compressor 10
Connection.
Wherein, referring to Fig. 1, the low-temperature circuit in the utility model embodiment specifically includes：The exhaust of cryogenic compressor 20
Mouth, the condenser pipe import of low temperature oil separating structure 21, heat exchanger 22 and Condensation-Evaporator 16 are sequentially connected by pipeline, and condensation-
The condenser pipe outlet of evaporator 16, the inlet of low temperature drying filter 23 and cryogenic regenerator 24 are sequentially connected by pipeline,
The liquid outlet of cryogenic regenerator 24 divides two-way to export, and a pipeline (hydrojet pipeline) and the hydrojet entrance of cryogenic compressor 20 connect
Connect, another pipeline is connected with the import of evaporator 26 and which is provided with low-temperature expansion valve 25, and the outlet of evaporator 26 passes through pipe
Road is connected with the air inlet of cryogenic regenerator 24, is led between the gas outlet of cryogenic regenerator 24 and the air entry of cryogenic compressor 20
Cross pipeline connection and the Buffer bypass with expansion vessel 27, the condenser pipe import of Condensation-Evaporator 16 are also associated between it
It is connected by the pipeline (cryogenic energy regulation bypass) with cryogenic energy regulating valve 29 with the air entry of cryogenic compressor 20.Enter
One step, Buffer bypass is provided with cushioning control valve 28.
Wherein, the utility model embodiment provides a kind of refrigeration system, and the System Priority considers Environmental Factors, selects as far as possible
With the refrigerant of environmental protection, refrigeration performance can be somewhat sacrificed.Because new refrigerant evaporating temperature is relatively low, the utility model is examined comprehensively
A series of problems, such as considering problem of oil return, cold regulation problem, the design of expansion vessel.Obtain using environmental protection refrigerant and energy
It is cooled to less than -60 DEG C of refrigeration system.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (6)
1. a kind of refrigeration system, it is characterised in that including high-temperature circuit and low-temperature circuit；
The high-temperature circuit include by pipeline connection high temperature compressor (10), high temperature oil eliminator (11), condenser (12),
High temperature drying filter (13), high temperature regenerator (14), high temperature expansion valve (15) and Condensation-Evaporator (16), the high-temperature high-pressure
The refrigerant of the exhaust outlet output of contracting machine (10) is successively through high temperature oil eliminator (11), condenser (12), high temperature drying filter
(13), high temperature regenerator (14), high temperature expansion valve (15) to Condensation-Evaporator (16) are evaporated, through high temperature backheat after evaporation
Device (14) to high temperature compressor (10) air entry；
The low-temperature circuit includes the cryogenic compressor (20), low temperature oil separating structure (21), heat exchanger connected by pipeline
(22), low temperature drying filter (23), cryogenic regenerator (24), low-temperature expansion valve (25) and evaporator (26), the low temperature pressure
The refrigerant of the exhaust outlet output of contracting machine (20) is successively through low temperature oil separating structure (21), heat exchanger (22) to Condensation-Evaporator
(16) condensed, through low temperature drying filter (23), cryogenic regenerator (24) and low-temperature expansion valve (25) to evaporation after condensation
Device (26) is evaporated, the air entry through cryogenic regenerator (24) to cryogenic compressor (20) after evaporation；Characterized in that,
High temperature energy regulation is provided between the evaporation tube import of the Condensation-Evaporator (16) and evaporation tube outlet to bypass, it is described
High temperature energy regulation bypass is provided with high temperature energy regulating valve (17) and air and liquid mixer (18)；The cryogenic compressor (20)
Cryogenic energy regulation bypass, the cryogenic energy regulation are provided between the condenser pipe import of air entry and Condensation-Evaporator (16)
Bypass is provided with cryogenic energy regulating valve (29), the air entry of the cryogenic compressor (20) and the outlet of cryogenic regenerator (24)
In parallel on pipeline between mouthful to be provided with Buffer bypass, the Buffer bypass is provided with expansion vessel (27)；The cryogenic compressor
(20) it is connected for liquid injection cooling type compressor and its hydrojet entrance by hydrojet pipeline with the liquid outlet of cryogenic regenerator (24).
2. refrigeration system according to claim 1, it is characterised in that the low temperature oil separating structure (21) is efficient by two
Oil eliminator is composed in series.
3. refrigeration system according to claim 1, it is characterised in that the condenser (12) is air-cooled condenser, described
Heat exchanger (22) is water cooling heat exchanger.
4. refrigeration system according to claim 1, it is characterised in that the high-temperature circuit is filled with R404A refrigerants, institute
State low-temperature circuit and be filled with R23 refrigerants.
5. refrigeration system according to claim 1, it is characterised in that the high-temperature circuit specifically includes：
Exhaust outlet, high temperature oil eliminator (11), condenser (12), the high temperature drying filter (13) of the high temperature compressor (10)
It is sequentially connected with the inlet of high temperature regenerator (14) by pipeline, liquid outlet, the high-temperature expansion of the high temperature regenerator (14)
The evaporation tube import of valve (15) and Condensation-Evaporator (16) is sequentially connected by pipeline, the evaporation of the Condensation-Evaporator (16)
Pipe outlet divides two-way to export, and a pipeline is connected with the air inlet of high temperature regenerator (14), another pipeline and Condensation-Evaporator
(16) evaporation tube import connects and is sequentially provided with high temperature energy regulating valve (17) and air and liquid mixer (18), the high temperature thereon
The gas outlet of regenerator (14) is connected by pipeline with the air entry of high temperature compressor (10).
6. refrigeration system according to claim 1, it is characterised in that the low-temperature circuit specifically includes：
Exhaust outlet, low temperature oil separating structure (21), heat exchanger (22) and the Condensation-Evaporator (16) of the cryogenic compressor (20)
Condenser pipe import be sequentially connected by pipeline, the outlet of the condenser pipe of the Condensation-Evaporator (16), low temperature drying filter
(23) it is sequentially connected with the inlet of cryogenic regenerator (24) by pipeline, the liquid outlet of the cryogenic regenerator (24) divides two-way
Output, a pipeline are connected with the hydrojet entrance of cryogenic compressor (20), and another pipeline is connected with the import of evaporator (26)
And low-temperature expansion valve (25) is which is provided with, the outlet of the evaporator (26) passes through pipeline and the air inlet of cryogenic regenerator (24)
Connection, is connected and its it between the gas outlet of the cryogenic regenerator (24) and the air entry of cryogenic compressor (20) by pipeline
Between be also associated with the Buffer bypass with expansion vessel (27), the condenser pipe import of the Condensation-Evaporator (16) by with
The pipeline of cryogenic energy regulating valve (29) is connected with the air entry of cryogenic compressor (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720818057.1U CN207146964U (en) | 2017-07-06 | 2017-07-06 | A kind of refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720818057.1U CN207146964U (en) | 2017-07-06 | 2017-07-06 | A kind of refrigeration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207146964U true CN207146964U (en) | 2018-03-27 |
Family
ID=61672387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720818057.1U Expired - Fee Related CN207146964U (en) | 2017-07-06 | 2017-07-06 | A kind of refrigeration system |
Country Status (1)
| Country | Link |
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| CN (1) | CN207146964U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112623545A (en) * | 2021-01-07 | 2021-04-09 | 魏宇杰 | Classification garbage can |
| CN113348332A (en) * | 2018-11-28 | 2021-09-03 | 艾威普科公司 | Staged starting method and device for air-cooled low-filling-amount ammonia refrigeration system |
-
2017
- 2017-07-06 CN CN201720818057.1U patent/CN207146964U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113348332A (en) * | 2018-11-28 | 2021-09-03 | 艾威普科公司 | Staged starting method and device for air-cooled low-filling-amount ammonia refrigeration system |
| CN113348332B (en) * | 2018-11-28 | 2023-01-24 | 艾威普科公司 | Staged starting method and device for air-cooled low-filling-amount ammonia refrigeration system |
| CN112623545A (en) * | 2021-01-07 | 2021-04-09 | 魏宇杰 | Classification garbage can |
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