CN106401897A - Full-sealed type refrigerant liquid pump structure and method for using same in high-rise building refrigerating system - Google Patents
Full-sealed type refrigerant liquid pump structure and method for using same in high-rise building refrigerating system Download PDFInfo
- Publication number
- CN106401897A CN106401897A CN201610815519.4A CN201610815519A CN106401897A CN 106401897 A CN106401897 A CN 106401897A CN 201610815519 A CN201610815519 A CN 201610815519A CN 106401897 A CN106401897 A CN 106401897A
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- China
- Prior art keywords
- low pressure
- pump
- refrigerant fluid
- seal casinghousing
- fluid pump
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/06—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure
- F04B15/08—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure the liquids having low boiling points
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- 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
- F25B41/00—Fluid-circulation arrangements
-
- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Disclosed are a full-sealed type refrigerant liquid pump structure and a method for using the same in a high-rise building refrigerating system. The using method (mounting method) is mainly implemented in the mode that a full-sealed type seal shell (7) obtained through a metal welding process and a pair of pipes composed of the gas pressure equalizing pipe (3) and the liquid pressure equalizing pipe (3') and connected with a low-pressure liquid storage barrel device (D) are additionally arranged on a combined structure including a pump body (2) and a pulling motor thereof so that normal work of the refrigerating system can be ensured. According to the full-sealed type refrigerant liquid pump structure and the method for using the same in the high-rise building refrigerating system, energy can be saved by about 30% as for daily operation cost; if a water-free energy transmission mode is also taken into consideration in a high-rise building heating system, a water-free energy transmission type high-rise building central refrigerating and heating air-conditioning system should be easily formed; and in addition, the problem that refrigerant leaks into outside space is avoided.
Description
Technical field
The present invention relates to a kind of can never tie to the full sealing type refrigerant fluid pump of airspace leakage of refrigerant molecule
Structure and its allow the cold-producing medium evaporation endothermic refrigeration latent heat of cold-producing medium phase transformation (rely on directly freeze) in high-rise storied house refrigerating system
The significantly energy-conservation conveying cold energy absorption refrigeration (picking cold between the sensible heat relying on the non-phase transformation of aqueous medium) to replace aqueous medium uses
Method, i.e. the connection using method of refrigeration system associated pipe.
Background technology
At present, in the refrigerated air-conditioning system of high level or high-rise building, formed by compressor in refrigeration system
Pressure is difficult to usually rely on the secondary cold of the equipment such as water and its supporting water pump composition by low-pressure, liquid refrigerant force feed up
Transmission coolant media dispenser assists to complete the conveying of cold.
Leakage problem due to liquid pump does not solve, and the leakage rate using water during water pump is big again, essentially without shadow
Ring the use cost to this refrigeration system, although increased allowing water assist transmission this middle ring of cold as middle transition medium
Section, unfavorable in the energy-conservation of whole refrigeration system, however, reality has been proven that what this still can bear；And adopt cold-producing medium
During pump, what it leaked is the cold-producing medium of very expensive air-conditioning high-temperature refrigeration purposes, and the sharp increase of caused use cost is people
Be difficult to bear, although this measure (adopting refrigerant fluid pump) can allow cold-producing medium pass through direct evaporation endothermic in vaporizer
Air to room is cooled down (the cold transmission intermediate link decreasing a water), is conducive to energy-conservation, however, what it brought
Compared with the harm that benefit is brought with cold-producing medium leakage, it is more harm than good, therefore, currently still maintain and ask aqueous medium to assist
The cold of high-rise building is transmitted with the delivery of energy of secondary " sensible heat " property of heat.
At present, (cold-producing medium can be from successfully to employ the ammonia pump of routine in the cryogenic refrigerating system of high-rise freezer first
Pump body leaks in airspace) for main body ammonia refrigerant pressurization dispenser it is achieved that in high-rise low temperature storehouse
The process of cold-producing medium direct evaporation refrigeration in vaporizer；Its deficiency is：Ammonia refrigerant liquid is from the internal past airspace of ammonia pump
Leakage rate larger, it is unavoidable for regularly periodically supplementing ammonia refrigerant to refrigeration system, even so, or profit is big
In disadvantage, because the cost of ammonia refrigerant is extremely low, moreover, the place less than 0 DEG C can not use water as medium；If by cold-producing medium
Ammonia (about 0.2 yuan of per kilogram) is changed to freon F12 (per kilogram is more than 50 yuan) or its congeniality succedaneum, and this will certainly become
Nearly hundred times ground improves the day-to-day operation cost of freezer；For this reason, using freon or its congeniality succedaneum as cold-producing medium
The low-temperature cold store overwhelming majority be all small unilamellar (now not needing refrigerant fluid pump), and in, large-scale high level freezer in by
In employing ammonia pump liquid provision, its cold-producing medium necessarily ammoniacal liquor using.
Generally, for the leakage problem of liquid pump, the requirement of GB (for being primarily directed to water) is to allow leakage, but
It is not allow to leak exceeded；However, for refrigerated medium pump, meeting the water pump of above-mentioned Standard, symbol still can not be served as
Close the day of the such as freon refrigerant (the cold-producing medium price replacing disabled freon is higher) using expensive non-Ammonia
Often use requirement.
Obviously, the premise solving the above problems is：Liquid pump must be solved, i.e. the leakage problem of refrigerant fluid pump, secondly, also
One is had to be exactly ensuing to employ technically reliable sex chromosome mosaicism in refrigeration systems after refrigerant fluid pump.
Content of the invention
The purpose of the present invention：
The leakage problem solving refrigerant fluid pump from its structure is started with, and employs technically cocksure auxiliary simultaneously again
Behave is helped to realize directly being evaporated the overall process of refrigeration in high-rise building in vaporizer using cold-producing medium.
The present invention it is critical only that：
Using the refrigerant fluid pump that can never leak and again with cocksure installation general layout (method) to realize on
The purpose of the present invention stating.
The feature of the present invention：
One. due to employing full seal type metal sealing housing in the structure of refrigerant fluid pump, this is just thorough solution
That is, and then be in high-rise or Super High building system the problem of high efficiency liquid pump spatial leaks cold-producing medium to external world creates condition,
Eliminate the inefficient above-mentioned secondary cold transmission coolant media of this delivery of energy of water in cold air conditioning system and also create condition.
Two. due to install when allow refrigerant fluid pump lower bottom part be higher than adapted low pressure receiver barrel inner refrigerant liquid level
Position, that is, before and after distance between the two there is height gap, this is just can never inside refrigerant fluid pump in work
There is the hydrops of cold-producing medium and and then created by the dragging motor that contact rotor finally damages within refrigerant fluid pump
Condition, that is, and then for definitely ensure that the normal work of refrigerant fluid pump creates condition.
Three. due to can there are two features (key element) of above-mentioned " one " and " two ", this is just that refrigeration system can be become
Work(ground is realized：Refrigeration modes are replaced in prior art by indirectly " water is situated between by direct " cold-producing medium is freezed by latent heat "
Matter passes through sensible heat transfer cold energy " create condition, that is, and then for can be (in refrigerating capacity during the use of refrigerated air-conditioning system
One timing：To be completed by conveying extremely large amount of aqueous medium and to complete to be changed to convey minimal amount of cold-producing medium) realize 30% about
Amount of energy saving create condition again.
Brief description
Fig. 1 illustrates the version of full sealing type refrigerant fluid pump.
The cold-producing medium pressurization that Fig. 2 illustrates full sealing type refrigerant fluid pump and the low pressure receiver barrel of adapted and forms is joined
Send the associated conduit connection status in apparatus system.
B：Refrigerant fluid pump；D：Low pressure receiver barrel is (with this dress employed in medium-sized and large-scale high level low-temperature cold store
Put identical)；P：Cold-producing medium liquid level in low pressure receiver barrel；H：Refrigerant fluid pump lower bottom part exceeds between cold-producing medium liquid level
Height gap；1：Feed tube；2：The pump housing (may be located at bottom or the top of dragging motor)；3：Gas pressure balancing pipe；4：Electricity
Machine rotor；5：Stator winding；6：Power transmission shaft；7：Metal sealing housing；8：Drain pipe；9：Compressor；10：Condenser；11：Throttling
Valve；12：Heat insulation layer；13：Low pressure receiver barrel shell；14：Liquid refrigerant；15：Evaporation in high-rise storied house refrigerating system
Device.
Specific embodiment
In conjunction with the signal of accompanying drawing of the present invention, the purpose above-mentioned in order to realize the present invention, intend using following technology：
Full sealing type refrigerant fluid pump B in the present invention includes in structure：
The pump housing 2 and the dragging motor being made up of with stator winding 5 rotor 4, the above-mentioned pump housing 2 and by rotor 4 with
The dragging motor that stator winding 5 is constituted is sealed in a seal casinghousing 7, and, this composition refrigerant fluid pump B's is close
It is additionally provided with pipe joint on capsule body 7：
Gas pressure balancing pipe 3 and fluid pressure balance pipe 3 ' and low pressure feed tube 1 and high pressure drain pipe 8；
The interface tube of described gas pressure balancing pipe 3 is and by shape between seal casinghousing 7 and the pump housing 2 and dragging motor
The top of the cavity space becoming is connected；
The interface tube of described fluid pressure balance pipe 3 ' is and by between seal casinghousing 7 and the pump housing 2 and dragging motor
The lower bottom part connection of the cavity space being formed；
The interface tube of described low pressure feed tube 1 is the feed liquor mouth of pipe through the cavity space in seal casinghousing 7 and the pump housing 2
Connect；
The interface tube of described high pressure drain pipe 8 is the drain pipe mouth through the cavity space in seal casinghousing 7 and the pump housing 2
Connect；
Described seal casinghousing 7 refer to be formed by metal with outside air isolation completely and pass through metal welding procedure
Implement the metal enclosed container of gap welding.
Using method in high-rise storied house refrigerating system for the full sealing type refrigerant fluid pump B in the present invention, i.e. this refrigeration
The installation requirement of agent liquid pump B：
One. refrigerant fluid pump B needs to meet following condition in setting：
The lower bottom part constituting the seal casinghousing 7 of refrigerant fluid pump B is located at：Refrigeration in the low pressure receiver barrel D of adapted
Position between agent liquid level P and low pressure receiver barrel D top, and, this lower bottom part distance between the two is deposited with this liquid level P
In enough height gaps H；
Two. constitute the method that the interface tube on the seal casinghousing 7 of refrigerant fluid pump B connects, i.e. refrigerant liquid to Outer Tube
Method even is as follows to Outer Tube for interface tube on pump B：
The interface tube of gas pressure balancing pipe 3 is connected to more than the cold-producing medium liquid level P of the low pressure receiver barrel D of adapted
Position；
The interface tube of fluid pressure balance pipe 3 ' is connected to the lower bottom part position of low pressure receiver barrel D or this dress of adapted
Put D inner refrigerant liquid level P position below；
The interface tube of low pressure feed tube 1 is connected in the lower bottom part position of low pressure receiver barrel D or this device D of adapted
Cold-producing medium liquid level P position below；
The interface tube of high pressure drain pipe 8 connects the import end position of vaporizer 15 in refrigeration systems.
The relevant issues that the present invention is related in being embodied as are described as follows：
One. being changed into high pressure liquid refrigerant by after refrigerant system condenser 10, entering have passed through choke valve 11 blood pressure lowering
After low pressure receiver barrel D storage, due to this device D outsourcing heat insulation layer, low-pressure, liquid refrigerant will not be in this intermediate transition
In container heat absorption evaporation, only after it is pumped into high-rise building vaporizer 10 by refrigerant fluid pump B, just can by with extraneous
Heat exchange normally absorbed heat boiling directly carry out sweat cooling work, that is, form the mistake directly to building internal refrigeration storage
Journey.
The key position (part) illustrated in Fig. 1 is in the structure of refrigerant fluid pump B of the present invention, there is a circle by hermetically sealed
The prevention refrigerant molecules that type metal sealing housing 7 is formed one three-dimensional defense line that airspace leaks to external world, this solid is prevented
Line can not be made up of conventional high molecule plastic or rubber, below this problem can be described special topic.
The cold-producing medium liquid level P in low pressure receiver barrel D illustrating in Fig. 2 is one of present invention key, and it can be with
Cooling load in building and limited change occurs, when cooling load is less, for example in building each room is not necessarily
It is required for freezing, the position of cold-producing medium liquid level P can be more higher, and when cooling load is larger, for example each room in building
Between be required for freeze, the position of cold-producing medium liquid level P can be more higher, for this：
When arranging the height and position of refrigerant fluid pump B, should not be too high, its lower bottom part should exceed this cold-producing medium liquid level P
Position bigger than normal for appropriate (preferably by experiment data be defined), for example：At least so that both height gap H aforementioned is enough
Greatly, slightly larger than 5 centimeters or 10 centimeters.
Two. due to there is, in the structure of the present invention, the metal sealing housing 7 constituting refrigerant fluid pump B, just prevent the pump housing 2
Internal high pressure liquid refrigerant leaks (seepage) at the axle envelope of power transmission shaft 6 by force and enters waste caused by airspace afterwards
Probability：
Above-mentioned leakage phenomenon by force is all difficult to avoid that for any pump housing 2, however, due to present configuration
Middle had the metal sealing housing 7 being formed by welding procedure and just fully covered the liquid leaking inside the pump housing 2 again
State cold-producing medium so that leaking of above-mentioned cold-producing medium becomes the leakage of whole refrigeration system internal part, and due to metallic molecule it
Between gap be less than liquid refrigerant molecular diameter, the liquid refrigeration agent molecule that leaks being covered is cannot to continue to pass through with solid
Pattern covers their three-dimensional defense line being formed by metal sealing housing 7.
This as：Long-term (for example by bike tire or automobile tire：1 year) not inflate be not all right the same, because with
Rubber is greater than the molecular diameter of air for the gap between the molecule of macromolecular material of main body itself, and simply air molecule is worn
More between the molecule of rubber-like macromolecular material, the speed in gap is unhappy.
Obviously：Formed by metal welding manner in the present invention full seal type (for material molecule magnitude and
Speech) metal sealing housing 7 structure, be to cause the full sealing type refrigerant fluid pump B in the present invention in refrigeration systems can be reliable
First key element of work.
Three. pass through in above-mentioned present configuration gas pressure balancing pipe 3 and a pair of pipeline of fluid pressure balance pipe 3 ' with
The connected behave of the region of interest of low pressure receiver barrel D, its object is to：Once constituting the pump of full sealing type refrigerant fluid pump B
The fluid pressure balance pipe 3 ' of B lower bottom part is at once back in the low pressure receiver barrel D of uniform pressure and is all reclaimed, and waits
It is used again later.
Obviously：Above-mentioned gas pressure balancing pipe 3 and fluid pressure is allowed to put down by installing in structure in the present invention
The pipeline that weighing apparatus pipe 3 ' is connected with low pressure receiver barrel D for a pair exists, and is to cause full sealing type refrigerant fluid pump B in the present invention
It is capable of second key element of reliably working in refrigeration systems.
Four. with regard to the single use life problems of full sealing type refrigerant fluid pump B：
Due to domestic refrigerator and compressor, their single use longevity used in domestic air conditioner can be investigated
Life typically can exceed 15 years, and World Famous Brand was more than 30 years；As the washing machine that the reason during their corrupted is rotated with driving water body,
Depend entirely on whether dragging motor therein also damages, that is, the service life impact of entrained motor is very big；In the present invention
The structure of full sealing type refrigerant fluid pump B falls within simplest dynamo-electric product non-removable as above-mentioned compressor
Product are it is clear that its disposable service life is always so that it exceedes above-mentioned 15 year or 30 years.
In sum：
It is not difficult to find out, form above two key elements in the present invention, that is,：Utterly guarantee " full seal type " and exhausted
Guarantee that " recycling after allowing the liquid refrigerant leaking inside the pump housing 2 to be recovered inside refrigeration system " is " to lack totally over the ground
One can not ", but be again easy realization.The a complete set of refrigeration system cost implementing the present invention is suitable with prior art,
However, its daily operating cost but can reach the effect of energy-conservation 30% about, and (the higher energy-saving effect of building level is more
Greatly)；If being also contemplated for the form of anhydrous delivery of energy in high-rise building heating, that is, form the high-rise building central authorities of anhydrous delivery of energy type
Waring and cooling air conditioning system, should also be easy realization, nor can there is a problem of increasing spatial leaks cold-producing medium to external world.
Claims (3)
1. a kind of full sealing type refrigerant fluid pump, this refrigerant fluid pump (B) includes in structure：
The pump housing (2) and the dragging motor being made up of rotor (4) and stator winding (5), the above-mentioned pump housing (2) and by rotor
(4) dragging motor being constituted with stator winding (5) is sealed in a seal casinghousing (7), and, this composition cold-producing medium
It is additionally provided with pipe joint on the seal casinghousing (7) of liquid pump (B)：
Gas pressure balancing pipe (3) and fluid pressure balance pipe (3 ') and low pressure feed tube (1) and high pressure drain pipe (8)；
The interface tube of described gas pressure balancing pipe (3) is and by between seal casinghousing (7) and the pump housing (2) and dragging motor
The top of the cavity space being formed is connected；
The interface tube of described fluid pressure balance pipe (3 ') be with by seal casinghousing (7) and the pump housing (2) and dragging motor it
Between formed cavity space lower bottom part connection；
The interface tube of described low pressure feed tube (1) is the feed tube through the cavity space in seal casinghousing (7) and the pump housing (2)
Mouth is connected；
The interface tube of described high pressure drain pipe (8) is the drain pipe through the cavity space in seal casinghousing (7) and the pump housing (2)
Mouth is connected.
2. a kind of full sealing type refrigerant fluid pump as claimed in claim 1, described seal casinghousing (7) refers to be formed by metal
With outside air isolation completely and by metal weld process implementing gap welding metal enclosed container.
3. user in high-rise storied house refrigerating system for a kind of full sealing type refrigerant fluid pump according to claim 1
Method, i.e. the installation requirement of this refrigerant fluid pump：
One. refrigerant fluid pump (B) needs to meet following condition in setting：
The lower bottom part constituting the seal casinghousing (7) of refrigerant fluid pump (B) is located at：System in the low pressure receiver barrel (D) of adapted
Position between cryogen liquid level (P) and low pressure receiver barrel (D) top, and, this lower bottom part and this cold-producing medium liquid level (P) two
There is enough height gaps (H) in the distance between person；
Two. constitute the method that the interface tube on the seal casinghousing (7) of refrigerant fluid pump (B) connects, i.e. refrigerant liquid to Outer Tube
The method that interface tube on pump (B) connects to Outer Tube is as follows：
The interface tube of gas pressure balancing pipe (3) is connected to more than the cold-producing medium liquid level (P) of the low pressure receiver barrel (D) of adapted
Position；
The interface tube of fluid pressure balance pipe (3 ') is connected to the lower bottom part position of low pressure receiver barrel (D) of adapted or this is low
Pressure liquid storage barrel (D) inner refrigerant liquid level (P) position below；
The interface tube of low pressure feed tube (1) is connected to the lower bottom part position of low pressure receiver barrel (D) or the storage of this low pressure of adapted
Liquid barrel (D) inner refrigerant liquid level (P) position below；
The interface tube of high pressure drain pipe (8) connects the import end position of vaporizer (15) in refrigeration systems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610815519.4A CN106401897A (en) | 2016-08-30 | 2016-08-30 | Full-sealed type refrigerant liquid pump structure and method for using same in high-rise building refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610815519.4A CN106401897A (en) | 2016-08-30 | 2016-08-30 | Full-sealed type refrigerant liquid pump structure and method for using same in high-rise building refrigerating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106401897A true CN106401897A (en) | 2017-02-15 |
Family
ID=57999609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610815519.4A Pending CN106401897A (en) | 2016-08-30 | 2016-08-30 | Full-sealed type refrigerant liquid pump structure and method for using same in high-rise building refrigerating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106401897A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3976391A (en) * | 1974-05-09 | 1976-08-24 | Weir Pumps Limited | Rotodynamic fluid pumps |
| CN2153654Y (en) * | 1992-07-10 | 1994-01-19 | 赵怀武 | U shape full sealing anticorrosion pump |
| CN101225805A (en) * | 2008-02-01 | 2008-07-23 | 大连劳雷流体设备有限公司 | Non-leakage reversed flow type plunger pump |
| CN101315080B (en) * | 2008-05-13 | 2011-09-07 | 深圳市雅尔典科技有限公司 | Full sealing type refrigerant fluid pump and its application in high-rise storied house refrigerating system |
| CN204061169U (en) * | 2014-09-01 | 2014-12-31 | 英德市雅家涂料有限公司 | A kind of coating gear pump reclaimed with leakage |
-
2016
- 2016-08-30 CN CN201610815519.4A patent/CN106401897A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3976391A (en) * | 1974-05-09 | 1976-08-24 | Weir Pumps Limited | Rotodynamic fluid pumps |
| CN2153654Y (en) * | 1992-07-10 | 1994-01-19 | 赵怀武 | U shape full sealing anticorrosion pump |
| CN101225805A (en) * | 2008-02-01 | 2008-07-23 | 大连劳雷流体设备有限公司 | Non-leakage reversed flow type plunger pump |
| CN101315080B (en) * | 2008-05-13 | 2011-09-07 | 深圳市雅尔典科技有限公司 | Full sealing type refrigerant fluid pump and its application in high-rise storied house refrigerating system |
| CN204061169U (en) * | 2014-09-01 | 2014-12-31 | 英德市雅家涂料有限公司 | A kind of coating gear pump reclaimed with leakage |
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Application publication date: 20170215 |
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