CN107178938B - Automatic exhaust system - Google Patents
Automatic exhaust system Download PDFInfo
- Publication number
- CN107178938B CN107178938B CN201710608826.XA CN201710608826A CN107178938B CN 107178938 B CN107178938 B CN 107178938B CN 201710608826 A CN201710608826 A CN 201710608826A CN 107178938 B CN107178938 B CN 107178938B
- Authority
- CN
- China
- Prior art keywords
- gas
- chamber
- exhaust
- liquid separation
- temperature generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/04—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for withdrawing non-condensible gases
- F25B43/046—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for withdrawing non-condensible gases for sorption type systems
-
- 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
-
- 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
Abstract
An automatic pumping and exhausting system comprises an exhaust chamber, an exhaust chamber and a gas-liquid separation chamber, wherein the exhaust chamber is connected with a low-temperature generator and/or a condenser through an electromagnetic valve pipeline; the extraction chamber is connected with the absorber through a pipeline; the gas-liquid separation chamber is respectively communicated with the exhaust chamber and the extraction chamber through pipelines; and a liquid level detection element is arranged in the gas-liquid separation chamber. On one hand, the invention can lead the non-condensable gas to automatically flow into the exhaust chamber through the pipeline, thus, a siphon or an injection device is not required to be added for forced introduction, thereby simplifying the structure and reducing the cost; on the other hand, through the automatic control of controller, solenoid valve, evacuation pump and aspiration pump, can take out the noncondensable gas of low temperature generator hydroecium inside and condenser inside, need not the vacuum pump, greatly reduced cost.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an automatic air pumping and exhausting system.
Background
The absorption type lithium bromide cold-warm water unit can generate non-condensable gas such as hydrogen in the normal operation process, so that the vacuum degree in the unit is reduced, and the output and the efficiency of the unit are reduced.
In the prior art, usually, the non-condensable gas of the lower cylinder absorber and the evaporator of the main body is extracted by adopting a siphon or injection mode, but the non-condensable gas generated by the high-temperature generator and the low-temperature generator cannot be extracted automatically and can only be extracted by depending on the manual operation of a vacuum pump. Because a large amount of water vapor exists in the unit during the operation of the unit, the oil emulsification of the vacuum pump is serious, the vacuum pumping capacity is limited, and an ideal vacuum state cannot be achieved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an automatic air pumping and exhausting system which is simple in structure and low in cost.
The technical scheme of the invention is as follows: an automatic pumping and exhausting system comprises an exhaust chamber, an exhaust chamber and a gas-liquid separation chamber, wherein the exhaust chamber is connected with a low-temperature generator and/or a condenser through an electromagnetic valve pipeline; the extraction chamber is connected with the absorber through a pipeline; the gas-liquid separation chamber is respectively communicated with the exhaust chamber and the extraction chamber through pipelines; and a liquid level detection element is arranged in the gas-liquid separation chamber.
The design idea of the scheme is as follows: when the high-temperature generator absorbs heat to generate steam which enters a water chamber and a heat exchange pipe of the low-temperature generator, non-condensable gas generated by the high-temperature generator is carried into the water chamber of the low-temperature generator by the steam flow, so that the gas in the water chamber of the low-temperature generator is extracted, namely the gas in the high-temperature generator is extracted. The non-condensable gas generated by the low-temperature generator is carried into the condenser along with the steam flow evaporated by the low-temperature generator, and the extraction of the gas in the condenser is equivalent to the extraction of the gas in the low-temperature generator. Therefore, the technical scheme only needs to connect the exhaust chamber with the low-temperature generator and/or the condenser, and does not need to connect the high-temperature generator. The exhaust chamber is connected with the low-temperature generator and can exhaust the non-condensable gas in the high-temperature generator and the low-temperature generator; the exhaust chamber is connected with the condenser and can exhaust the non-condensable gas in the low-temperature generator and the condenser.
In addition, when the absorption type lithium bromide cold and warm water unit operates normally, the pressure inside the low-temperature generator and the pressure inside the condenser are both larger than the pressure of the absorber, by utilizing the characteristic, the non-condensable gas of the low-temperature generator or the condenser is introduced into an exhaust chamber of the unit by a pipeline, and the non-condensable gas flows into the exhaust chamber automatically through the pipeline under the pressure difference.
Therefore, according to the design concept, the invention has the following advantages: the characteristic that the pressure inside the low-temperature generator and the pressure inside the condenser are both larger than the pressure of the absorber is fully utilized, so that the non-condensable gas automatically flows into the exhaust chamber through the pipeline, and a siphon or an injection type device is not required to be added for forced introduction, so that the structure is simplified, and the cost is reduced.
Furthermore, the exhaust chamber pipeline is connected with an exhaust pump, and the air pumping chamber pipeline is connected with an air pumping pump. The non-condensable gas in the exhaust chamber can be quickly exhausted by the air pump; through the air extracting pump, the non-condensable gas in the air extracting chamber can be quickly exhausted.
Furthermore, the exhaust chamber is connected with a water chamber of the low-temperature generator through a solenoid valve pipeline, and the air exhaust chamber is connected with a cylinder body of the absorber through a pipeline; or the exhaust chamber is connected with the cylinder of the condenser through a solenoid valve pipeline, and the air exhaust chamber is connected with the cylinder of the absorber through a pipeline; or the exhaust chamber is connected with a water chamber of the low-temperature generator through a solenoid valve pipeline, the exhaust chamber is connected with a cylinder of the condenser through another solenoid valve pipeline, and the air exhaust chamber is connected with a cylinder of the absorber through a pipeline.
Further, the air exhaust chamber is communicated with the gas-liquid separation chamber through an air exhaust pipe, one end of the air exhaust pipe extends into the gas-liquid separation chamber, and the distance from the air exhaust pipe to the bottom of the gas-liquid separation chamber is smaller than the distance from the liquid level detection element to the bottom of the gas-liquid separation chamber. Therefore, on one hand, the solution is conveniently pressed into the exhaust pipe to enter the exhaust chamber until the liquid level detection element detects that the liquid level leaves the probe; and on the other hand, liquid sealing is realized.
Further, the exhaust pipe is of a siphon type or an injection type. Thus, the air can be pumped out quickly.
Furthermore, a vacuum valve is arranged between the exhaust chamber and the low-temperature generator and/or the condenser, so that vacuum leakage in the unit can be prevented.
Further, the gas-liquid separation chamber is connected with the absorber through a return pipe. Therefore, the lithium bromide solution in the gas-liquid separation chamber can flow back to the absorber for cyclic utilization.
Furthermore, the liquid level detection element is connected with a controller, and the output end of the controller is connected with the electromagnetic valve, the exhaust pump and the air pump. Through the automatic control of controller, solenoid valve, air pump and aspiration pump, can take out the noncondensable gas of low temperature generator hydroecium inside and condenser inside, need not the vacuum pump, greatly reduced cost.
Furthermore, an exhaust valve is arranged on the exhaust chamber.
Further, an exhaust probe is arranged on the exhaust chamber.
The invention has the beneficial effects that: on one hand, the characteristic that the pressure inside the low-temperature generator and the pressure inside the condenser are both higher than the pressure of the absorber can be fully utilized, so that the non-condensable gas automatically flows into the exhaust chamber through the pipeline, and a siphon or injection type device is not required to be added for forced introduction, thereby simplifying the structure and reducing the cost; on the other hand, through the automatic control of controller, solenoid valve, exhaust pump and aspiration pump, can take out the noncondensable gas of low temperature generator hydroecium inside and condenser inside, need not the vacuum pump, greatly reduced cost.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The invention will be described in further detail below with reference to the drawings and specific examples.
As shown in fig. 1: an automatic air pumping and exhausting system comprises an exhaust chamber 1, an air pumping chamber 2 and an air-liquid separation chamber 3. The exhaust chamber 1 is connected with a water chamber of the low-temperature generator through a solenoid valve 11, the exhaust chamber 1 is connected with a cylinder of the condenser through another solenoid valve 12, and the extraction chamber 2 is connected with a cylinder of the absorber through a pipeline. The gas-liquid separation chamber 3 is respectively communicated with the exhaust chamber 1 and the extraction chamber 2 through pipelines; a liquid level detection probe 4 is arranged in the gas-liquid separation chamber 3. Wherein, communicate through exhaust tube 21 between exhaust chamber 2 and the gas-liquid separation room 3, the one end of exhaust tube 21 stretches into gas-liquid separation room 3, and the distance of exhaust tube 21 distance 3 bottoms of gas-liquid separation room is less than the distance of liquid level detection probe 4 distance 3 bottoms of gas-liquid separation room, and the one end of exhaust tube 21 stretches into in the exhaust chamber 2, and exhaust tube 21 is siphon or ejector type trachea. The exhaust chamber 1 and the gas-liquid separation chamber 3 communicate with each other through an exhaust pipe 16.
The exhaust chamber 1 is connected with an exhaust pump 5 through a pipeline, and the exhaust chamber 2 is connected with an exhaust pump 6 through a pipeline. The gas-liquid separation chamber 3 is connected to the absorber via a return conduit 31.
The liquid level detection probe 4 is connected with a controller, and the output end of the controller is connected with an electromagnetic valve, an exhaust pump and an air pump. In this embodiment, the controller is preferably a PLC controller. The suction pump 5 and the exhaust pump 6 are canned pumps.
During the theory of operation of this embodiment, through timing to the PLC controller for this pump drainage gas system intermittent type formula carries out automatic pump drainage gas, if once every 1 minute pump drainage gas. When the set time of pumping and exhausting gas is up, the PLC controller controls the two electromagnetic valves to be opened, because the pressure in the low-temperature generator and the condenser is higher than the pressure in the absorber when the absorption type lithium bromide cold and warm water unit normally operates, the characteristic is utilized, under the action of pressure difference, the non-condensable gas from the high-temperature generator automatically enters the exhaust chamber through the pipeline connected with the low-temperature generator, the non-condensable gas from the low-temperature generator automatically enters the exhaust chamber through the pipeline connected with the condenser, because the exhaust chamber is communicated with the gas-liquid separation chamber, the non-condensable gas also enters the gas-liquid separation chamber through the exhaust pipe, the lithium bromide solution from the absorber is stored in the gas-liquid separation chamber, the non-condensable gas is positioned on the upper side of the solution, and the gas-liquid separation chamber is communicated with the exhaust chamber, so that the solution in the exhaust chamber can be guided into the gas-liquid separation chamber; the air pump is always in an operating state, non-condensable gas in the air pumping chamber is sucked into the gas-liquid separation chamber in a siphoning or ejecting mode, the non-condensable gas is separated from liquid, the non-condensable gas is positioned on the upper side of the gas-liquid separation chamber, when the gas pressure is increased, the liquid level detection probe detects that the liquid level leaves the probe, a signal is sent to the controller, the controller controls the two electromagnetic valves to be closed, the air exhaust pump is rapidly started, and the non-condensable gas is exhausted out of the unit, namely the non-condensable gas is exhausted through the air exhaust valve; when the liquid level detection probe detects the liquid level, the controller controls the exhaust pump to stop exhausting.
In summary, in the embodiment, on one hand, the characteristic that the pressure inside the low-temperature generator and the pressure inside the condenser are both greater than the pressure of the absorber can be fully utilized, so that the non-condensable gas automatically flows into the exhaust chamber through the pipeline, and a siphon or an injection device is not required to be added for forced introduction, thereby not only simplifying the structure, but also reducing the cost; on the other hand, through the automatic control of controller, solenoid valve, exhaust pump and aspiration pump, can take out the noncondensable gas of low temperature generator hydroecium inside and condenser inside, need not the vacuum pump, greatly reduced cost.
Claims (7)
1. An automatic pumping and exhausting system is characterized by comprising an exhaust chamber, an exhaust chamber and a gas-liquid separation chamber, wherein the exhaust chamber is connected with a water chamber of a low-temperature generator through an electromagnetic valve pipeline and is used for exhausting non-condensable gas in the high-temperature generator and the low-temperature generator; the exhaust chamber is connected with the cylinder of the condenser through another electromagnetic valve pipeline and is used for exhausting the low-temperature generator and the non-condensable gas in the condenser; the extraction chamber is connected with the absorber through a pipeline; the gas-liquid separation chamber is respectively communicated with the exhaust chamber and the extraction chamber through pipelines; a liquid level detection element is arranged in the gas-liquid separation chamber; the gas extraction chamber is communicated with the gas-liquid separation chamber through a gas extraction pipe, one end of the gas extraction pipe extends into the gas-liquid separation chamber, and the distance from the gas extraction pipe to the bottom of the gas-liquid separation chamber is smaller than the distance from the liquid level detection element to the bottom of the gas-liquid separation chamber; the gas-liquid separation chamber is connected with the absorber through a return pipe;
the PLC controller is timed to enable the gas pumping and exhausting system to intermittently and automatically pump and exhaust gas, when the set time for pumping and exhausting gas is up, the PLC controller controls the two electromagnetic valves to be opened, the non-condensable gas from the high-temperature generator automatically enters the exhaust chamber through a pipeline connected with the low-temperature generator under the action of pressure difference, the non-condensable gas from the low-temperature generator automatically enters the exhaust chamber through a pipeline connected with the condenser, the non-condensable gas also enters the gas-liquid separation chamber through the exhaust pipe, the lithium bromide solution from the absorber is stored in the gas-liquid separation chamber, and the non-condensable gas is located on the upper side of the solution.
2. The automatic air pumping and exhausting system of claim 1, wherein the air pumping chamber is connected to an air pumping pump by a pipeline, and the air pumping chamber is connected to an air pumping pump by a pipeline.
3. The automatic air extraction and exhaust system of claim 1, wherein the air extraction pipe is siphon-type or ejector-type.
4. The system according to claim 1 or 2, wherein a vacuum valve is further provided between the exhaust chamber and the low temperature generator and/or the condenser.
5. The automatic air pumping and exhausting system of claim 1, wherein the liquid level detecting element is connected with a controller, and the output end of the controller is connected with the electromagnetic valve, the air exhaust pump and the air suction pump.
6. The automatic extraction and exhaust system of claim 1 or 2 wherein the exhaust chamber is further provided with an exhaust valve.
7. The automatic extraction and exhaust system of claim 1 or 2, wherein the exhaust chamber is further provided with an exhaust probe.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710608826.XA CN107178938B (en) | 2017-07-25 | 2017-07-25 | Automatic exhaust system |
| JP2019530710A JP6986081B2 (en) | 2017-07-25 | 2017-12-04 | Automatic extraction and exhaust system |
| PCT/CN2017/114417 WO2019019514A1 (en) | 2017-07-25 | 2017-12-04 | System for automatic gas extraction and discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710608826.XA CN107178938B (en) | 2017-07-25 | 2017-07-25 | Automatic exhaust system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107178938A CN107178938A (en) | 2017-09-19 |
| CN107178938B true CN107178938B (en) | 2023-02-03 |
Family
ID=59837559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710608826.XA Active CN107178938B (en) | 2017-07-25 | 2017-07-25 | Automatic exhaust system |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6986081B2 (en) |
| CN (1) | CN107178938B (en) |
| WO (1) | WO2019019514A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178938B (en) * | 2017-07-25 | 2023-02-03 | 远大空调有限公司 | Automatic exhaust system |
| CN110170197A (en) * | 2019-07-04 | 2019-08-27 | 辽宁蓝海川流流体控制设备有限公司 | A kind of clapboard type filter |
| US20210265016A1 (en) | 2020-02-20 | 2021-08-26 | Illumina, Inc. | Data Compression for Artificial Intelligence-Based Base Calling |
| KR102266912B1 (en) * | 2021-01-29 | 2021-06-18 | (주)월드이엔씨 | Apparatus and method for extracting by automatic in vacuum hot water boiler |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1948869A (en) * | 2005-10-14 | 2007-04-18 | 张跃 | Vacuum pump less automatic exhaust device of lithium bromide machine set and its method |
| CN207035594U (en) * | 2017-07-25 | 2018-02-23 | 远大空调有限公司 | A kind of automatic exhaust system |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1924914A (en) * | 1929-05-08 | 1933-08-29 | Stator Refrigeration Inc | Absorption system |
| JPH0718619B2 (en) * | 1988-03-23 | 1995-03-06 | 三洋電機株式会社 | Cooling / heating switching type absorption chiller extraction device |
| JPH0769100B2 (en) * | 1989-04-27 | 1995-07-26 | 株式会社日立製作所 | Bleeding device |
| JPH0436573U (en) * | 1990-07-25 | 1992-03-26 | ||
| JPH05264132A (en) * | 1992-03-24 | 1993-10-12 | Hitachi Ltd | Gas extractor for absorption type water heater/cooler |
| JPH07280396A (en) * | 1994-04-04 | 1995-10-27 | Hitachi Ltd | Bleeder |
| JPH08121911A (en) * | 1994-10-21 | 1996-05-17 | Nippondenso Co Ltd | Absorption refrigerating machine utilizing engine exhaust heat |
| CN2235592Y (en) * | 1995-10-16 | 1996-09-18 | 沈晓东 | Two stages separation type automatic air pumping out device |
| JP3209927B2 (en) * | 1996-09-18 | 2001-09-17 | リンナイ株式会社 | Absorption refrigeration equipment |
| JP2006214698A (en) * | 2005-02-07 | 2006-08-17 | Sanyo Electric Co Ltd | Extraction device |
| KR100978646B1 (en) * | 2005-10-17 | 2010-08-27 | 위에 장 | Automatic gas discharging device for lithium-bromid machine and method thereof |
| CN206054852U (en) * | 2016-08-31 | 2017-03-29 | 远大空调有限公司 | A kind of automatic purging vacuum valve and the air exhausting device being made from it |
| CN107178938B (en) * | 2017-07-25 | 2023-02-03 | 远大空调有限公司 | Automatic exhaust system |
-
2017
- 2017-07-25 CN CN201710608826.XA patent/CN107178938B/en active Active
- 2017-12-04 WO PCT/CN2017/114417 patent/WO2019019514A1/en active Application Filing
- 2017-12-04 JP JP2019530710A patent/JP6986081B2/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1948869A (en) * | 2005-10-14 | 2007-04-18 | 张跃 | Vacuum pump less automatic exhaust device of lithium bromide machine set and its method |
| CN207035594U (en) * | 2017-07-25 | 2018-02-23 | 远大空调有限公司 | A kind of automatic exhaust system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019019514A1 (en) | 2019-01-31 |
| JP2020528534A (en) | 2020-09-24 |
| JP6986081B2 (en) | 2021-12-22 |
| CN107178938A (en) | 2017-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107178938B (en) | Automatic exhaust system | |
| CN105115203B (en) | Automatic pumping system, the refrigeration unit with the system and Automatic-bleeding method | |
| CN105927548A (en) | Water-spray screw steam compressor | |
| CN204313545U (en) | A kind of liquid reservoir with gas-liquid separation and refrigerating function | |
| CN103301640B (en) | Concentration method and device for traditional Chinese medicine extracting solution | |
| CN107387364B (en) | Vacuum system | |
| CN203583460U (en) | Combination-type soft foundation treatment construction equipment | |
| CN202237344U (en) | Condensate water automatic drainer | |
| CN201397058Y (en) | Steam-extracting cooling system for improving vacuumizing effect of condenser | |
| CN207035594U (en) | A kind of automatic exhaust system | |
| CN206648365U (en) | The automatic control system of absorption heat exchange device working medium | |
| CN210688774U (en) | Novel intelligent energy-saving water boiler | |
| CN211302117U (en) | Vacuum concentration system utilizing refrigerant to directly condense and heat and tea juice concentrator | |
| CN103691140B (en) | Condensed-water discharging system and control method thereof | |
| CN203620270U (en) | Condensate water drainage system | |
| CN209326399U (en) | Condense island system | |
| CN208785784U (en) | A kind of external circulation evaporator | |
| CN209323500U (en) | A kind of single pump type vacuum preloading drainage arrangement | |
| CN215176153U (en) | Drainage device for lithium bromide refrigerator | |
| CN214535713U (en) | Concentrated vacuum collector of liquid medicine | |
| CN114658698B (en) | Combined liquid injection vacuumizing system and vacuumizing method | |
| CN217421520U (en) | Water ring vacuum pump cooling system applied to heat pump evaporation equipment | |
| CN214537461U (en) | Energy-saving vacuum pumping system for waste heat power generation | |
| CN203980737U (en) | A kind of refrigeration system | |
| CN217139225U (en) | Novel double-effect concentrator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |