CN108195051A - A kind of refrigerant heating unit and air conditioner - Google Patents
A kind of refrigerant heating unit and air conditioner Download PDFInfo
- Publication number
- CN108195051A CN108195051A CN201711194135.6A CN201711194135A CN108195051A CN 108195051 A CN108195051 A CN 108195051A CN 201711194135 A CN201711194135 A CN 201711194135A CN 108195051 A CN108195051 A CN 108195051A
- Authority
- CN
- China
- Prior art keywords
- refrigerant
- outer barrel
- heating unit
- inner cylinder
- exocoel
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention provides a kind of refrigerant heating unit and air conditioner, refrigerant heating unit include：Outer barrel (1)；Inner cylinder (2), the inner cylinder (2) is internal positioned at the outer barrel (1) and forms exocoel (3) between, and inner cavity chamber (4) is formed inside the inner cylinder (2)；Fin (7) is arranged in the exocoel (3) and is connected to the inner cylinder (2) outer wall between the outer barrel (1) inner wall；Refrigerant pipeline (5), the refrigerant pipeline (5) are arranged in the exocoel (3)；Heating element (6), the heating element (6) are set in the inner cavity chamber (4).It can will be in the refrigerant pipeline in the heat transfer to exocoel of heating element by inner cylinder, fin by the present invention, so that heat transfer more uniformly, fully transmits heat to exocoel, heat output bigger, the heat that refrigerant acquisition in refrigerant pipeline is evenly distributed, reach uniform temperature, heat exchange efficiency effectively improves.
Description
Technical field
The invention belongs to air-conditioning technical fields, and in particular to a kind of refrigerant heating unit and air conditioner.
Background technology
Existing heat pump air conditioning system defrost heat is essentially from compressor work, if continued during defrost to indoor progress
Heat supply, it will interior is blown into for the heat of defrost, so as to weaken defrost ability.
Existing refrigerant heating unit uses the form of casing more, and inner tube is heating unit, and outer tube is refrigerant passage, refrigerant
Enter the heat for absorbing and being transmitted from inner tube from outer tube, complete heating, but there are temperature for refrigerant heating unit in existing technology
Be unevenly distributed, heat exchange area it is small, it is low so as to cause device hot-spot or heat exchange efficiency.
Due to that heat supply or even can not can be used for during heat pump air conditioning system defrost of the prior art from indoor absorption heat
Defrost causes fluctuations in indoor temperature larger, and comfort is poor, seriously affects the usage experience of user；Electric heater unit cost compared with
Height, temperature distribution is non-uniform and heat exchange efficiency is low, is unfavorable for the technical problems such as popularization and application, therefore the present invention is ground on a large scale
Study carefully and design a kind of refrigerant heating unit and air conditioner.
Invention content
Therefore, the technical problem to be solved in the present invention is to overcome the heating unit temperature of air-conditioning system of the prior art
It is unevenly distributed and the defects of heat exchange efficiency is low, so as to provide a kind of refrigerant heating unit and air conditioner.
The present invention provides a kind of refrigerant heating unit, including：
Outer barrel；
Inner cylinder, the inner cylinder are located inside the outer barrel and form exocoel, the inner cylinder between
Inside forms inner cavity chamber；
Fin is arranged in the exocoel and is connected between the inner cylinder outer wall and the outer barrel inner wall；
Refrigerant pipeline, the refrigerant pipeline are arranged in the exocoel；
Heating element, the heating element are set in the inner cavity chamber.
Preferably,
The outer barrel and the outer barrel are coaxial cylinder, and the fin is multiple and is along the circumferential direction distributed
Between the inner cylinder and the outer barrel.
Preferably,
Further include be set in the exocoel, the fins set between two fins, the fins set include it is more
A fin, multiple fins are in axial direction arranged.
Preferably,
The through-hole that the refrigerant pipeline passes through can be accommodated by being provided in the axial direction in the fins set.
Preferably,
It is respectively provided between every two adjacent fins there are one fins set, multiple fins sets are uniformly arranged along circumferential direction
Cloth, the fin ring bodies for forming annulus cylindricality.
Preferably,
Conduction oil is also filled in the exocoel, between the gap of multiple fins.
Preferably,
After further including the drive end bearing bracket for being set to the outer barrel axial forward end and being set to the outer barrel axial rearward end
Multiple receiving holes that the refrigerant pipeline can be allowed to pass through are both provided on end cap, the drive end bearing bracket and the rear end cap.
Preferably,
The position opposite with the inner cavity chamber offers channel, is therefrom worn with accommodating the heating element on the drive end bearing bracket
It crosses to stretch into the inner cavity chamber.
Preferably,
The inner cylinder corresponds to axial one end of the rear end cap using individually sealing, and the inner cylinder correspond to it is described before
Axial one end of end cap is in the axial direction relative to protruding a distance of the axial forward end of the outer barrel.
Preferably,
The drive end bearing bracket and the rear end cap with the outer barrel welded seal.
Preferably,
The outer barrel and the inner cylinder are cast for aluminium or stainless steel,
And/or the drive end bearing bracket and the rear end cap make for aluminum material；
And/or the outer barrel external surface package insulating layer.
Preferably,
The heating element is electric heating element：
Including heating wire and magnesia rod, the heating wire winding in the magnesia rod,
Or including heating wire and magnesia cylinder, the heating wire is inserted in magnesia cylinder.
The present invention also provides a kind of air conditioner, including preceding any one of them refrigerant heating unit.
A kind of refrigerant heating unit and air conditioner provided by the invention have the advantages that：
1. the refrigerant heating unit and air conditioner of the present invention, by the outer barrel and inner cylinder of suit, inner cylinder and outer barrel
Exocoel is formed between body, inner cavity chamber is formed inside the inner cylinder；Fin is arranged in the exocoel and is connected to institute
It states between inner cylinder outer wall and the outer barrel inner wall；Refrigerant pipeline, the refrigerant pipeline are arranged in the exocoel；Heating
Component, the heating element are set in the inner cavity chamber, can by inner cylinder, fin by the heat transfer of heating element extremely
In refrigerant pipeline in exocoel so that heat transfer more uniformly, fully transmits heat to exocoel, heat output bigger, refrigerant
The heat that refrigerant acquisition in pipeline is evenly distributed, reaches uniform temperature, heat exchange efficiency effectively improves；
2. the refrigerant heating unit and air conditioner of the present invention, exocoel can be further promoted by the fins set of setting
The heated heat transfer efficiency of middle refrigerant pipeline so that heat transfer is more uniformly distributed and obtains the heat output of bigger；By in multiple fins
The conduction oil filled between gap can further promote the thermal efficiency of refrigerant pipeline so that heat transfer is more uniformly distributed and obtains
The heat output of bigger.
Description of the drawings
Fig. 1 is the three-dimensional appearance structure diagram of the refrigerant heating unit of the present invention；
Fig. 2 is the structure diagram in the A directions of the sleeve of refrigerant heating unit in Fig. 1；
Fig. 3 is the configuration schematic diagram of the refrigerant heating unit of the present invention.
Reference numeral is expressed as in figure：
1st, outer barrel；2nd, inner cylinder；3rd, exocoel；4th, inner cavity chamber；5th, refrigerant pipeline；51st, inlet tube；52nd, outlet；6、
Heating element；7th, fin；8th, fins set；81st, through-hole；9th, drive end bearing bracket；10th, rear end cap.
Specific embodiment
As shown in Figs. 1-3, the present invention provides a kind of refrigerant heating unit, including：
Outer barrel 1；
Inner cylinder 2, the inner cylinder 2 is located inside the outer barrel 1 and forms exocoel 3 between, described interior
2 inside of cylinder forms inner cavity chamber 4；
Fin 7, be arranged in the exocoel 3 and be connected to 2 outer wall of inner cylinder and 1 inner wall of outer barrel it
Between (preferably fin is fixedly connected with inner cylinder outer wall and outer barrel inner wall, further preferred fin and inner cylinder and outer barrel one
It is body formed)；
Refrigerant pipeline 5 (preferably coil pipe), is arranged in the exocoel 3；
Heating element 6, the heating element 6 are set in the inner cavity chamber 4.
By the outer barrel and inner cylinder of suit, exocoel is formed between inner cylinder and outer barrel, inside the inner cylinder
Form inner cavity chamber；Fin, be arranged in the exocoel and be connected to the inner cylinder outer wall and the outer barrel inner wall it
Between；Refrigerant pipeline, the refrigerant pipeline are arranged in the exocoel；Heating element, the heating element are set in described
It, can will be in the refrigerant pipeline in the heat transfer to exocoel of heating element by inner cylinder, fin in chamber so that heat transfer
More uniformly, fully heat is transmitted to exocoel, heat output bigger, the heat that the refrigerant acquisition in refrigerant pipeline is evenly distributed
Amount, reaches uniform temperature, heat exchange efficiency effectively improves.
Heat supply or even it can not can cause room from indoor absorption heat for defrost during existing heat pump air conditioning system defrost
Interior temperature fluctuation is larger, and comfort is poor, seriously affects the usage experience of user.
Existing electric heater unit cost is higher, temperature distribution is non-uniform and heat exchange efficiency is low, is unfavorable for large-scale
It promotes and applies.
The refrigerant heating unit of the present invention, heat can be provided in the case of unlatching for heat pump system.In the heating operation phase
Between open can the heating time of system be extended with the heat capacity of lifting system.Defrost heat can be increased by being opened during defrost
Amount accelerates defrost speed.If opened it simultaneously with inner blower during defrost, the lasting heat supply of system can be not only realized,
Defrost speed is also secure simultaneously.
The device is made of fin casing, fins set, electric heating element, coil pipe, drive end bearing bracket, rear end cap, and the device is because with rib
Piece, fins set, heat can efficient uniform transmission.
In addition, the device is directly connected in original system, without additional parallel pipeline, therefore threeway can be saved
The cost of valve and parallel pipeline.
Preferably,
The outer barrel 1 and the inner cylinder 2 are coaxial cylinder, and the fin 7 is multiple and along the circumferential direction divides
Cloth is between the inner cylinder 2 and the outer barrel 1.This is the preferred structure shape of the inside and outside cylinder of the telescoping structure of the present invention
Formula, and fin is multiple transfer performances that can improve heat, improves the even distribution of heat.
Preferably,
Further include be set in the exocoel 3, the fins set 8 between two fins 7, the fins set 8 wraps
Multiple fins that arrangement is laminated along tubular axis direction are included, multiple fins are in axial direction arranged.It is preferred that the fin is
Surface carries the louvered fin of trepanning.The heated of refrigerant pipeline in exocoel can further be promoted by the fins set of setting
Heat transfer efficiency so that heat transfer is more uniformly distributed and obtains the heat output of bigger.
Preferably,
The through-hole 81 that the refrigerant pipeline 5 passes through can be accommodated by being provided in the axial direction in the fins set 8.By logical
Hole can accommodate refrigerant pipeline and extend there through so that refrigerant is flowed through from refrigerant pipeline and the shape between fins set in through-holes
Into heat exchange, heat exchange efficiency is effectively further improved.
Preferably,
Fins set 8 there are one being respectively provided between every two adjacent fins 7, multiple fins sets 8 are uniform along circumferential direction
Arrangement, the fin ring bodies for forming annulus cylindricality.This be the present invention fins set and fin between preferred fit form, one
Fins set is just inserted into two adjacent fins, in the space that inside and outside cylinder surrounds, and refrigerant pipeline can be carried out using the space high
The heat exchange of effect ground, improves heat exchange efficiency.
Space, fins set described in each group are collectively formed between two adjacent fins and inner cylinder outer wall and outer barrel inner wall
8 are respectively arranged in a space.
Preferably
Conduction oil is also filled in the exocoel 3, between the gap of multiple fins.
The refrigerant heating unit of the present invention, uses Electric heating to provide heat, main composition during air-conditioning defrost
Component has cylindrical fin casing, fins set, electric heating element, coil pipe, drive end bearing bracket, rear end cap.The refrigerant heating module by into
Mouth pipe and outlet pipeline welding access system original with air-conditioning.
The fin casing has exocoel and inner cavity chamber, and exocoel is the separate chamber separated by fin；Electric heating element
In inner cavity chamber；Fins set is located in each independent exocoel respectively, and U-shaped coil pipe passes through each fins set；Fins set is surface
Porose louvered fin composition；The gap perfusion conduction oil of fins set in exocoel；Inner cavity chamber rear end individually seals and in guarantee
Chamber front bulkhead is higher than fin casing front end outer wall, and electric heating element is inserted into from drive end bearing bracket.Heating can be opened with the device during defrost
It opens, after device is opened, the heat of generation is taken out of by the refrigerant for flowing through coil pipe for indoor heating or outer machine heat exchanger defrost.
Preferably,
It further includes the drive end bearing bracket 9 for being set to 1 axial forward end of outer barrel and is set to 1 axial rearward end of outer barrel
Rear end cap 10 is both provided with multiple receivings that the refrigerant pipeline 5 can be allowed to pass through on the drive end bearing bracket 9 and the rear end cap 10
Hole.Outer barrel can be sealed in this way, prevent especially conduction oil from being leaked from exocoel, by being set on front and rear cover
The receiving hole put enables to refrigerant pipeline to extend there through, hence into being heated in exocoel and from front and rear cover
In be pierced by and sent out in the exocoel with the refrigerant after being heated.
Preferably,
The position opposite with the inner cavity chamber 4 offers channel (preferably circular hole), with described in receiving on the drive end bearing bracket 9
Heating element 6 extends there through to stretch into the inner cavity chamber 4.Heating element can allow for by the channel set on drive end bearing bracket
It extends there through and gos deep into inner cavity chamber, the arrangement for heating element provides mounting condition.
Preferably,
The inner cylinder 2 corresponds to axial one end of the rear end cap 10 using individually sealing, and the inner cylinder 2 corresponds to institute
State axial one end of drive end bearing bracket 9 in the axial direction relative to protruding one section of the axial forward end of the outer barrel 1 away from
From.That is inner cavity chamber front end wall surface is higher than fin casing front end wall surface.
Conduction oil can be avoided to enter inner cavity chamber 4 in this way and influence the normal operation of heating element 6.
Refrigerant pipeline 5 (preferably coil pipe) is inserted into across fins set 8 in the exocoel 3 of fin casing (i.e. outer barrel 1), entirely
The U-shaped layout of refrigerant pipeline, the gap perfusion conduction oil of fins set 8 in exocoel 3.Electric heating element is from fin casing (i.e. outer barrel
1) front end is inserted into, and 4 rear end of inner cavity chamber is individually sealed relative to exocoel 3.Fin casing (i.e. outer barrel 1) rear end rear end cap 10
Sealing, front end drive end bearing bracket 9 seal.
Preferably,
The drive end bearing bracket 9 and the rear end cap 10 with the outer barrel welded seal.
It is preferred that 4 rear end of inner cavity chamber is welded using fish scale type weld seam.
It is preferred that forward and backward end cap forms seal with fin casing (i.e. outer barrel 1) sealing welding, conduction oil is avoided to let out
Dew, weld seam are also to select the welding of fish scale type weld seam.
Preferably,
The outer barrel 1 and the inner cylinder 2 are cast for aluminium or stainless steel,
And/or the drive end bearing bracket 9 and the rear end cap 10 make for aluminum material；
And/or 1 outer surface of the outer barrel package insulating layer.
This is the preferably fabricated material of outer barrel of the present invention, inner cylinder, drive end bearing bracket, rear end cap, can ensure that its structure is strong
Degree, and outer barrel external surface cladding insulating layer can keep internal heat and not distribute outward, so as to improve the heating to refrigerant
Effect prevents heat to scatter and disappear, and improves heat exchange efficiency.
Preferably,
The heating element 6 is electric heating element：
Including heating wire and magnesia rod, the heating wire winding in the magnesia rod,
Or including heating wire and magnesia cylinder, the heating wire is inserted in magnesia cylinder.Surrounding is furnished with fuse and limit
Warm device.
This is the preferred constructive form of the heating element of the present invention, can play the role of heating and heat transfer, and ensure peace
Full performance.
The present invention also provides a kind of air conditioner, including preceding any one of them refrigerant heating unit.The present invention is due to packet
Aforementioned refrigerant heating unit is included, it can be by inner cylinder, fin by the refrigerant in the heat transfer to exocoel of heating element
In pipeline so that heat transfer more uniformly, fully transmits heat to exocoel, heat output bigger, and the refrigerant in refrigerant pipeline obtains
Uniform heat must be distributed, reaches uniform temperature, heat exchange efficiency effectively improves.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.With
Only it is the preferred embodiment of the present invention described in upper, it is noted that for those skilled in the art, not
Under the premise of being detached from the technology of the present invention principle, several improvement and modification can also be made, these improvements and modifications also should be regarded as this
The protection domain of invention.
Claims (13)
1. a kind of refrigerant heating unit, it is characterised in that：Including：
Outer barrel (1)；
Inner cylinder (2), the inner cylinder (2) is internal positioned at the outer barrel (1) and forms exocoel (3), institute between
It states and inner cavity chamber (4) is formed inside inner cylinder (2)；
Fin (7) is arranged in the exocoel (3) and is connected in the inner cylinder (2) outer wall and the outer barrel (1)
Between wall；
Refrigerant pipeline (5), the refrigerant pipeline (5) are arranged in the exocoel (3)；
Heating element (6), the heating element (6) are set in the inner cavity chamber (4).
2. refrigerant heating unit according to claim 1, it is characterised in that：
The outer barrel (1) and the inner cylinder (2) are coaxial cylinder, and the fin (7) is multiple and along the circumferential direction
It is distributed between the inner cylinder (2) and the outer barrel (1).
3. refrigerant heating unit according to claim 2, it is characterised in that：
Further include be set in the exocoel (3), the fins set (8) between two fins (7), the fins set
(8) including multiple fins, multiple fins are in axial direction arranged.
4. refrigerant heating unit according to claim 3, it is characterised in that：
The through-hole (81) that the refrigerant pipeline (5) passes through can be accommodated by being provided in the axial direction on the fins set (8).
5. refrigerant heating unit according to claim 3, it is characterised in that：
Fins set (8) there are one being respectively provided between every two adjacent fins (7), multiple fins sets (8) are equal along circumferential direction
Even arrangement, the fin ring bodies for forming annulus cylindricality.
6. refrigerant heating unit according to claim 3, it is characterised in that：
Conduction oil is also filled in the exocoel (3), between the gap of multiple fins.
7. refrigerant heating unit according to claim 1, it is characterised in that：
It further includes the drive end bearing bracket (9) for being set to the outer barrel (1) axial forward end and is set to the outer barrel (1) axial rearward end
Rear end cap (10), being both provided on the drive end bearing bracket (9) and the rear end cap (10) multiple can allow the refrigerant pipeline (5)
The receiving hole passed through.
8. refrigerant heating unit according to claim 7, it is characterised in that：
The position opposite with the inner cavity chamber (4) offers channel, to accommodate the heating element (6) on the drive end bearing bracket (9)
It extends there through to stretch into the inner cavity chamber (4).
9. refrigerant heating unit according to claim 7, it is characterised in that：
Axial one end of the corresponding rear end cap (10) of the inner cylinder (2) is using individually sealing, and the inner cylinder (2) is corresponding
The axial forward end of the axial one end of the drive end bearing bracket (9) in the axial direction relative to the outer barrel (1) is protruding
A distance.
10. refrigerant heating unit according to claim 7, it is characterised in that：
The drive end bearing bracket (9) and the rear end cap (10) with the outer barrel welded seal.
11. refrigerant heating unit according to claim 7, it is characterised in that：
The outer barrel (1) and the inner cylinder (2) are cast for aluminium or stainless steel,
And/or the drive end bearing bracket (9) and the rear end cap (10) make for aluminum material；
And/or outer barrel (1) the outer surface package insulating layer.
12. refrigerant heating unit according to claim 1, it is characterised in that：
The heating element (6) is electric heating element：
Including heating wire and magnesia rod, the heating wire winding in the magnesia rod,
Or including heating wire and magnesia cylinder, the heating wire is inserted in magnesia cylinder.
13. a kind of air conditioner, it is characterised in that：Including the refrigerant heating unit described in any one of claim 1-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711194135.6A CN108195051B (en) | 2017-11-24 | 2017-11-24 | Refrigerant heating device and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711194135.6A CN108195051B (en) | 2017-11-24 | 2017-11-24 | Refrigerant heating device and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108195051A true CN108195051A (en) | 2018-06-22 |
| CN108195051B CN108195051B (en) | 2023-09-22 |
Family
ID=62573006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711194135.6A Active CN108195051B (en) | 2017-11-24 | 2017-11-24 | Refrigerant heating device and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108195051B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109556207A (en) * | 2018-11-30 | 2019-04-02 | 厦门三维丝环保股份有限公司 | A kind of air purifier of high temperature sterilization |
| CN113091357A (en) * | 2021-04-02 | 2021-07-09 | 青岛海尔空调器有限总公司 | Refrigerant heating mechanism and refrigerant filling device |
| CN114146438A (en) * | 2022-01-12 | 2022-03-08 | 巩义市予华仪器有限责任公司 | Air medium heating and cooling rotary evaporator |
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| CN207648968U (en) * | 2017-11-24 | 2018-07-24 | 珠海格力电器股份有限公司 | A kind of refrigerant heating device and air conditioner |
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| US20020023744A1 (en) * | 1999-12-10 | 2002-02-28 | Kwang-Il Kim | Manufacturing method for split heat exchanger having oval tubes in zigzag pattern |
| US20030217565A1 (en) * | 2000-06-28 | 2003-11-27 | Kevin Flynn | Liquid chiller evaporator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109556207A (en) * | 2018-11-30 | 2019-04-02 | 厦门三维丝环保股份有限公司 | A kind of air purifier of high temperature sterilization |
| CN113091357A (en) * | 2021-04-02 | 2021-07-09 | 青岛海尔空调器有限总公司 | Refrigerant heating mechanism and refrigerant filling device |
| CN114146438A (en) * | 2022-01-12 | 2022-03-08 | 巩义市予华仪器有限责任公司 | Air medium heating and cooling rotary evaporator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108195051B (en) | 2023-09-22 |
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