CN105371541B - Refrigerant injection device and refrigerant method for implanting - Google Patents
Refrigerant injection device and refrigerant method for implanting Download PDFInfo
- Publication number
- CN105371541B CN105371541B CN201410432098.8A CN201410432098A CN105371541B CN 105371541 B CN105371541 B CN 105371541B CN 201410432098 A CN201410432098 A CN 201410432098A CN 105371541 B CN105371541 B CN 105371541B
- Authority
- CN
- China
- Prior art keywords
- refrigerant
- injection device
- valve
- solenoid valve
- mass flowmenter
- 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
Abstract
A kind of refrigerant injection device and refrigerant method for implanting.Refrigerant injection device includes：Controller and refrigerant punching note pipe-line system, the pipe-line system include the vacuum pump connected by pipeline, the refrigerant tank, solenoid valve and the mass flowmenter that are stored with refrigerant；Wherein, the first end of solenoid valve is connected to refrigerant tank；The second end of solenoid valve is connected to the first end of mass flowmenter；The second end of mass flowmenter is connected to refrigerant device to be implanted；The second end of mass flowmenter is also connect with vacuum pump；The controller is electrically connected respectively with solenoid valve, mass flowmenter and vacuum pump.Refrigerant injection device provided by the invention can be by the linkage of mass flowmenter, solenoid valve and programmable logic controller (PLC) (PLC), and so as to fulfill the purpose of control refrigerant implantation quality, precision and repeatability are high.
Description
Technical field
The present invention relates to refrigerated air-conditioning systems, and equipment manufactures and designs field, it is more particularly related to a kind of refrigerant
Injection device and refrigerant method for implanting.
Background technology
Refrigerant (also known as refrigerant) is in refrigerating and air conditioning system, to transferring heat energy, generates the workflow of refrigerating effect
Body.In production process is tested, pressure-viscosity versus temperature (PVT) examination for carrying out refrigerant and refrigerator oil mixture is generally required
Test amount.PVT test measurements device needs to inject refrigerant in the high-pressure balancing chamber for having noted refrigerator oil in punching, is actually implanted into refrigerant
Quality needs are controlled and are recorded.
But since the equilibrium still of trial body is equipped with compared with multi-pipeline and sensor, and it is fixed on high/low temperature alternation case
In, so weight method commonly used in the prior art is not suitable for the device, and weigh and be turned off manually the mode quality of input lock
Error is larger.
Invention content
The technical problems to be solved by the invention are to be directed to that drawbacks described above exists in the prior art, and providing one kind can be effective
Control the refrigerant injection device of refrigerant implantation quality and refrigerant method for implanting.
In order to realize above-mentioned technical purpose, according to the first aspect of the invention, a kind of refrigerant injection device is provided, wrapped
It includes：Controller and the refrigerant punching note pipe-line system by controller control, the pipe-line system includes connecting by pipeline true
Sky pump, the refrigerant tank, solenoid valve and the mass flowmenter that are stored with refrigerant；Wherein, the first end of solenoid valve is connected to refrigerant tank；Electricity
The second end of magnet valve is connected to the first end of mass flowmenter；The second end of mass flowmenter is connected to refrigerant device to be implanted；
The second end of mass flowmenter is also connect with vacuum pump；The controller is electric with solenoid valve, mass flowmenter and vacuum pump respectively
Gas connects.
Preferably, refrigerant device to be implanted is mounted in insulating box.
Preferably, refrigerant device to be implanted is autoclave；The high-pressure balancing chamber of closing, high-voltage flat are equipped in the autoclave
Weighing apparatus intracavitary rushes a certain amount of refrigerator oil of injection in advance.
Preferably, the pipeline between refrigerant tank and the first end of solenoid valve is connected with capillary and refrigerant gasification vessel；Institute
The first end for stating capillary is connect with refrigerant tank, and the second end of capillary is connected to the first end of refrigerant gasification vessel；Refrigerant gas
The second end for changing container is connected to solenoid valve first end.
Preferably, the pipeline between vacuum pump and the second end of mass flowmenter is connected with vacuum meter；The mass flow
Pipeline between second end and the refrigerant device to be implanted of meter is connected with pressure gauge.
Preferably, it is equipped with the first valve close to the pipeline of the refrigerant tank；The second end of mass flowmenter and pressure gauge it
Between be equipped with the 4th valve；The second valve is equipped between 4th valve and vacuum meter, is set between pressure gauge and refrigerant device to be implanted
There is third valve.
Preferably, the first valve, the second valve, third valve and the 4th valve are manual ball valves.
Preferably, controller is mounted in anti-explosion cabinet；The anti-explosion cabinet further includes controller and solenoid valve, mass flowmenter
With the electrical connection circuit of vacuum pump；The refrigerant punching note pipe-line system is installed in refrigerant cabinet.
Preferably, controller is programmable logic controller (PLC).
According to the second aspect of the invention, a kind of refrigerant method for implanting is provided, employs above-mentioned refrigerant injection device,
It is characterized in that including：The pipeline of entire refrigerant injection device is vacuumized first with vacuum pump；In the pipe of refrigerant injected system
After road reaches predetermined vacuum level, refrigerant is injected to refrigerant injection device from the refrigerant tank for being stored with refrigerant and injected using refrigerant
The quality of the refrigerant of the mass flow meter measurement injection of device, the matter when the refrigerant of measurement result display injection reaches predetermined quality
Flowmeter feedback signal is measured to controller, solenoid valve is automatically controlled and closes system, stop injection.
Refrigerant injection device provided by the invention can pass through mass flowmenter, solenoid valve and programmable logic controller (PLC)
(PLC) linkage, so as to fulfill the purpose of control refrigerant implantation quality.Mass flowmenter is not by pressure, temperature during testing
Degree or fluid state (gas phase or liquid phase) influence, and not by external environment influence, precision and repeatability are very high, with required for acquisition
System pressure and refrigerant/oil injection ratio (oil in advance add in PVT experimental rigs autoclave in).
Description of the drawings
With reference to attached drawing, and by reference to following detailed description, it will more easily have more complete understanding to the present invention
And be more easily understood its with the advantages of and feature, wherein：
Fig. 1 schematically shows the structure diagram of refrigerant injection device according to the preferred embodiment of the invention.
Fig. 2 schematically shows the major parts of the pipeline of refrigerant injection device according to the preferred embodiment of the invention
Schematic diagram.
Fig. 3 schematically shows the PVT experimental provision refrigerants of refrigerant injection device according to the preferred embodiment of the invention
Inject schematic diagram.
It should be noted that attached drawing is not intended to limit the present invention for illustrating the present invention.Note that represent that the attached drawing of structure can
It can be not necessarily drawn to scale.Also, in attached drawing, same or similar element indicates same or similar label.
Specific embodiment
In order to make present disclosure more clear and understandable, with reference to specific embodiments and the drawings in the present invention
Appearance is described in detail.
The present invention devises a set of refrigerant injection device, completes " to vacuumize → refrigerant injects → and reach fixed matter wherein
The whole process of amount stopping injection ", and pass through mass flowmenter, solenoid valve and programmable logic controller (PLC) (PLC) and realize refrigerant
Quality accurately controls and record.It will be detailed below the preferred embodiment of the present invention.
Fig. 1 schematically shows the structure diagram of refrigerant injection device according to the preferred embodiment of the invention.
As shown in Figure 1, refrigerant injection device according to the preferred embodiment of the invention includes：Controller (such as may be programmed and patrol
It is volume controller, not shown in FIG. 1) and refrigerant punching note pipe-line system 400 by controller control, the pipe-line system 400
Including the vacuum pump 200 connected by pipeline, the refrigerant tank 100, solenoid valve 30 and the mass flowmenter 40 that are stored with refrigerant.
Refrigerant punching note pipe-line system 400 is installed in refrigerant cabinet 300.
Controller is mounted in the anti-explosion cabinet of 300 side of refrigerant cabinet, and touch screen is set on anti-explosion cabinet.Controller respectively with electromagnetism
Valve 30, mass flowmenter 40 are connected with vacuum pump 200 by electric wiring, and main electric wiring is placed in anti-explosion cabinet.
Fig. 2 schematically shows the major parts of the pipeline of refrigerant injection device according to the preferred embodiment of the invention
Schematic diagram.
As shown in Fig. 2, refrigerant punching note pipe-line system 400 according to the preferred embodiment of the invention further includes：10 He of capillary
Refrigerant gasification vessel 20.
Wherein, the first end of capillary 10 is connect by first manual valve 1 (for example, manual ball valve) with refrigerant tank 100,
The second end of capillary 10 is connected to the first end of refrigerant gasification vessel 20；Capillary 10 is used to depressurize the refrigerant of inflow
Processing.
The second end of refrigerant gasification vessel 20 is connected to the first end of solenoid valve 30；Refrigerant gasification vessel 20 is used for flowing into
Refrigerant carry out gasification process.
The second end of solenoid valve 30 is connected to the first end of mass flowmenter 40；Solenoid valve 30 holds for refrigerant to be controlled to gasify
Device 20 is switched on and off to mass flowmenter 40.The quality and flow of refrigerant that mass flowmenter 40 flows through for measurement.
Refrigerant punching note pipe-line system 400 according to the preferred embodiment of the invention further includes：Vacuum meter 210 and pressure gauge 310.
The second end of mass flowmenter 40 is connected to pressure gauge 310 by the 4th hand-operated valve 4 (for example, manual ball valve)；
The second end of mass flowmenter 40 is connected to by the 4th hand-operated valve 4 and the second hand-operated valve 2 (for example, manual ball valve)
Vacuum pump 200 and vacuum meter 210, and the second end of mass flowmenter 40 passes through 3 (example of the 4th hand-operated valve 4 and third hand-operated valve
Such as, manual ball valve) it is connected to refrigerant device to be implanted.
Refrigerant device to be implanted according to the preferred embodiment of the invention is autoclave, and the high-voltage flat of closing is equipped in autoclave
Weigh chamber, and high-pressure balancing intracavitary rushes a certain amount of refrigerator oil of injection in advance.
Preferably, autoclave is mounted in insulating box, convenient for controlling the temperature of high-pressure balancing chamber, maintains the low temperature of autoclave
State.The refrigerant density in autoclave is increased by the cooling (about -10 DEG C) to autoclave, ensures enough punchings note of refrigerant,
Also reduce the error that pipeline remaining refrigerant is brought into.
Specifically, the present invention can install anti-explosion cabinet in refrigerant cabinet side, main electric part is placed in anti-explosion cabinet
In, and can be designed to control electric part by controller using touch screen.Accordingly even when gas leakage occurs for pipeline, also can
The cold media gas (the weak combustion property gas such as including R32) and electrical contact of leakage are avoided as possible.
By using capillary decompression and refrigerant gasification vessel, ensure that refrigerant is the injection of pure gas state, reduces mistake
Difference.For mass flowmenter, neat liquid or gas more can be accurately detected, but if being the mixing of gas and liquid
Object, precision will significantly decline.And for refrigerant, since boiling point itself is relatively low, if it is desired to which neat liquid injects, even if with cold
100 inverted mode of matchmaker's tank is injected, it is also possible to be gasified in pipeline, be become admixture.So designed that pure gas injects, it is
Guarantee refrigerant will not be mixed into drop during injection, after refrigerant enters refrigerant injection device from refrigerant tank 100 along pipeline,
Capillary is first passed around, capillary plays decompression gasification, subsequently into refrigerant gasification vessel (sealing container), further protects
Card gasification.
The refrigerant injection device be substantially one can accurate control injection refrigerant quality rush dispensing device, it can also be used to its
During he tests, the corresponding interface is reserved in refrigerant injection device, and break-make is controlled with ball valve or other hand-operated valves.
It is above-mentioned manual in the case of full-automatic realize although describing the present invention by example of hand-operated valve above
Valve can be replaced by the automatic valve that controller controls.
Fig. 3 schematically shows the PVT experimental provision refrigerants of refrigerant injection device according to the preferred embodiment of the invention
Inject schematic diagram.
It first designs and builds above-mentioned refrigerant injection device (injecting cabinet for double door), in inner panel and/or both sides panel
Arrange pipeline, refrigerant injection device integral arrangement is as shown in Figure 1, first with vacuum pump 200 to entire refrigerant injection device
Pipeline vacuumizes and (excludes air, vacuum meter 210 shows the vacuum degree of pipeline)；Reach predetermined true in the pipeline of refrigerant injected system
After reciprocal of duty cycle, close the second hand-operated valve 2, at this time from be stored with the refrigerant tank 100 of refrigerant to refrigerant injection device inject refrigerant and
The quality of the refrigerant of injection is measured using the mass flowmenter 40 of refrigerant injection device, in the refrigerant of measurement result display injection
Mass flowmenter feedback signal gives the controller of such as programmable logic controller (PLC) etc when reaching predetermined quality, automatically controls electricity
Magnet valve closes system, stops injection (stopping injection of the refrigerant from refrigerant tank 100 to refrigerant injection device).So as to complete to take out true
Sky → refrigerant injects → reaches the process that predetermined quality stops injection, so as to pass through the linkage of mass flowmenter+PLC+ solenoid valves
The quality of accurate control refrigerant injection.
More specifically, in refrigerant injection process, refrigerant enters refrigerant injection device by refrigerant tank, subtracts by capillary
Pressure, and refrigerant gasification vessel ensure that the refrigerant of injection is all gaseous state (no liquid refrigerant), pass through quality stream after refrigerant
(such as PVT testing stands are autoclave to gauge injection testing system, and autoclave is maintained predetermined low temperature level shape using refrigeration system
State), mass flowmenter detects the quality by refrigerant in real time in this course, and feeds back to controller, needed for reaching
After the quality wanted, controller closes solenoid valve, so as to terminate refrigerant injection process.
In specific example, realize that system is vacuumized using refrigerant injection device and inject two processes with refrigerant.It is practical into
The refrigerant injection test of R410A, R22 is gone, at ambient temperature, equilibrium still, which is filled with after refrigerator oil 200ml, is only capable of injection about
The refrigerant of 20-30g.Then cooled down by temperature-controlling system, the saturated vapor pressure difference after cooling due to R410A, R22 is distinguished most
200g and more than 300g can be injected greatly, and tests refrigerator oil about 200g, can meet the pressure of refrigerant and refrigerator oil mixture
Power-viscosity versus temperature (PVT) measures the demand of experiment.
It ensure that refrigerant is the injection of pure gas state, and further above by capillary decompression and refrigerant gasification vessel
Ground is by ensureing the cooling of equilibrium still enough punchings of refrigerant are noted, and reduce pipeline error.
Refrigerant injection device provided by the invention can pass through mass flowmenter, solenoid valve and programmable logic controller (PLC)
(PLC) linkage, so as to fulfill the purpose of control refrigerant implantation quality.Mass flowmenter is not by pressure, temperature during testing
Degree or fluid state (gas phase or liquid phase) influence, and not by external environment influence, precision and repeatability are very high, with required for acquisition
System pressure and refrigerant/oil injection ratio (oil in advance add in PVT experimental rigs autoclave in).
Meanwhile the refrigerant injection device be substantially one can accurate control injection refrigerant quality rush dispensing device, also may be used
For in other experiments, having reserved the corresponding interface in refrigerant injection device, and break-make is controlled with hand-operated valve.
Furthermore, it is necessary to explanation, unless stated otherwise or is pointed out, the otherwise term in specification " first ", " the
Two ", the descriptions such as " third " are used only for distinguishing various components, element, step in specification etc., each without being intended to indicate that
Logical relation or ordinal relation between component, element, step etc..
It is understood that although the present invention has been disclosed in the preferred embodiments as above, above-described embodiment not to
Limit the present invention.For any those skilled in the art, without departing from the scope of the technical proposal of the invention,
Many possible changes and modifications are all made to technical solution of the present invention using the technology contents of the disclosure above or are revised as
With the equivalent embodiment of variation.Therefore, every content without departing from technical solution of the present invention, technical spirit pair according to the present invention
Any simple modifications, equivalents, and modifications made for any of the above embodiments still fall within the range of technical solution of the present invention protection
It is interior.
Claims (9)
1. a kind of refrigerant injection device, it is characterised in that including：Controller and the refrigerant punching note pipeline system by controller control
System, the pipe-line system include the vacuum pump connected by pipeline, the refrigerant tank, solenoid valve and the mass flow that are stored with refrigerant
Meter；Wherein, the first end of solenoid valve is connected to refrigerant tank；The second end of solenoid valve is connected to the first end of mass flowmenter；Matter
The second end of amount flowmeter is connected to refrigerant device to be implanted；The second end of mass flowmenter is also connect with vacuum pump；The control
Device processed is electrically connected respectively with solenoid valve, mass flowmenter and vacuum pump, between the refrigerant tank and the first end of solenoid valve
Pipeline is connected with capillary and refrigerant gasification vessel；The first end of the capillary is connect with refrigerant tank, the second end of capillary
It is connected to the first end of refrigerant gasification vessel；The second end of refrigerant gasification vessel is connected to solenoid valve first end.
2. refrigerant injection device according to claim 1, which is characterized in that the refrigerant device to be implanted is mounted on constant temperature
In case.
3. refrigerant injection device according to claim 2, which is characterized in that the refrigerant device to be implanted is autoclave；
The high-pressure balancing chamber of closing is equipped in the autoclave, high-pressure balancing intracavitary rushes a certain amount of refrigerator oil of injection in advance.
4. refrigerant injection device according to claim 1, which is characterized in that the second of the vacuum pump and mass flowmenter
Pipeline between end is connected with vacuum meter；Pipeline connection between second end and the refrigerant device to be implanted of the mass flowmenter
There is pressure gauge.
5. refrigerant injection device according to claim 4, which is characterized in that the pipeline close to the refrigerant tank is equipped with first
Valve；The 4th valve is equipped between the second end and pressure gauge of mass flowmenter；Second is equipped between 4th valve and vacuum meter
Valve is equipped with third valve between pressure gauge and refrigerant device to be implanted.
6. refrigerant injection device according to claim 5, which is characterized in that the first valve, the second valve, third valve and
4th valve is manual ball valve.
7. refrigerant injection device according to claim 1, which is characterized in that the controller is mounted in anti-explosion cabinet；Institute
State the electrical connection circuit that anti-explosion cabinet further includes controller and solenoid valve, mass flowmenter and vacuum pump；The refrigerant punching note pipe
Road system is installed in refrigerant cabinet.
8. refrigerant injection device according to claim 1, which is characterized in that the controller is Programmable logical controller
Device.
9. a kind of refrigerant method for implanting is employed according to the refrigerant injection device described in one of claim 1 to 8, feature exists
In including：The pipeline of entire refrigerant injection device is vacuumized first with vacuum pump；Reach in the pipeline of refrigerant injected system
After predetermined vacuum level, refrigerant is injected to refrigerant injection device from the refrigerant tank for being stored with refrigerant and utilize refrigerant injection device
The quality of the refrigerant of mass flow meter measurement injection, the mass flow when the refrigerant of measurement result display injection reaches predetermined quality
Feedback signal is counted to controller, solenoid valve is automatically controlled and closes system, stop injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410432098.8A CN105371541B (en) | 2014-08-28 | 2014-08-28 | Refrigerant injection device and refrigerant method for implanting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410432098.8A CN105371541B (en) | 2014-08-28 | 2014-08-28 | Refrigerant injection device and refrigerant method for implanting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105371541A CN105371541A (en) | 2016-03-02 |
| CN105371541B true CN105371541B (en) | 2018-06-26 |
Family
ID=55373963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410432098.8A Active CN105371541B (en) | 2014-08-28 | 2014-08-28 | Refrigerant injection device and refrigerant method for implanting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105371541B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331742B (en) * | 2017-05-10 | 2019-12-06 | 浙江飞越机电有限公司 | vacuumizing detection control system and method |
| CN107702390A (en) * | 2017-11-21 | 2018-02-16 | 上海理工大学 | A kind of carbon dioxide refrigerant high accuracy filling system and method |
| CN108845592B (en) * | 2018-08-20 | 2024-02-27 | 苏州佐竹冷热控制技术有限公司 | Refrigerant filling measurement system and refrigerant filling method |
| CN113531964A (en) * | 2021-07-06 | 2021-10-22 | 青岛海尔空调器有限总公司 | Refrigerant recovery system and recovery method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4470265A (en) * | 1982-05-10 | 1984-09-11 | Gerlach Industries | Refrigerant charging system |
| CN2454173Y (en) * | 2000-12-13 | 2001-10-17 | 赵大庆 | Automatic air-conditioner repairing machine |
| DE102008029947A1 (en) * | 2008-06-26 | 2009-12-31 | Volkswagen Ag | Coolant filling device for detectors has control device able to close valve when threshold temperature value is detected by temperature sensor |
| CN101820990A (en) * | 2007-10-05 | 2010-09-01 | 三菱化学株式会社 | Process for charging liquefied ammonia, process for production of nitride crystals, and reactor for growth of nitride crystals |
| CN102538326A (en) * | 2011-12-28 | 2012-07-04 | 中国计量学院 | Automatic liquid mixing and filling system for commercial thermal expansion valve and automatic liquid mixing and filling method for same |
| CN203605560U (en) * | 2013-06-14 | 2014-05-21 | 上汽通用五菱汽车股份有限公司 | Filling gun of refrigerant filling machine |
-
2014
- 2014-08-28 CN CN201410432098.8A patent/CN105371541B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4470265A (en) * | 1982-05-10 | 1984-09-11 | Gerlach Industries | Refrigerant charging system |
| CN2454173Y (en) * | 2000-12-13 | 2001-10-17 | 赵大庆 | Automatic air-conditioner repairing machine |
| CN101820990A (en) * | 2007-10-05 | 2010-09-01 | 三菱化学株式会社 | Process for charging liquefied ammonia, process for production of nitride crystals, and reactor for growth of nitride crystals |
| DE102008029947A1 (en) * | 2008-06-26 | 2009-12-31 | Volkswagen Ag | Coolant filling device for detectors has control device able to close valve when threshold temperature value is detected by temperature sensor |
| CN102538326A (en) * | 2011-12-28 | 2012-07-04 | 中国计量学院 | Automatic liquid mixing and filling system for commercial thermal expansion valve and automatic liquid mixing and filling method for same |
| CN203605560U (en) * | 2013-06-14 | 2014-05-21 | 上汽通用五菱汽车股份有限公司 | Filling gun of refrigerant filling machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105371541A (en) | 2016-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105371541B (en) | Refrigerant injection device and refrigerant method for implanting | |
| KR100929580B1 (en) | Leakage Tester for Low Temperature Valve | |
| CN106461497B (en) | The leakage detection equipment and method that automatic pressure is adjusted | |
| KR100731146B1 (en) | A evaluating performance test equipments of hydrogen storage | |
| CN105403390B (en) | Safety valve low-temperature test system and safety valve low-temperature test method | |
| KR100947109B1 (en) | Parts tester for an extremely low temperature | |
| CN109631435B (en) | Refrigerant charging system and method | |
| US11309703B2 (en) | Transformer simulation system, and simulation and measurement method for setting value | |
| CN106643989B (en) | Density calibration system and method for mass flowmeter | |
| CN102538326B (en) | Automatic liquid mixing and filling system for commercial thermal expansion valve and automatic liquid mixing and filling method for same | |
| CN110411735A (en) | A kind of Subzero valve simulation duty testing device | |
| CN104266798B (en) | Refrigerant leakage tester and refrigerant leak testing method | |
| US20180024026A1 (en) | System And Method For Integrity Testing Of Flexible Containers | |
| CN205426491U (en) | Relief valve cold test system | |
| CN106248730B (en) | Test device for heat-insulating material performance detection | |
| KR101445751B1 (en) | Using a cryogenic fluid heat exchanger valve leakage measuring device | |
| CN104111146B (en) | Refrigerant leakage testing apparatus and control method for same | |
| CN113030151B (en) | Device and method for testing liquefaction rate of low-temperature gas liquefaction device | |
| CN108845592B (en) | Refrigerant filling measurement system and refrigerant filling method | |
| CN110308357A (en) | A kind of high low temperature cycles test device | |
| RU123948U1 (en) | LARGE VESSEL VESSEL TEST DEVICE | |
| CN202420058U (en) | System for automatically mixing and filling liquid for commercial thermal expansion valve | |
| RU202066U1 (en) | DEVICE FOR TIGHTNESS CONTROL OF LARGE VESSELS | |
| CN204404582U (en) | A kind of flow-type refrigeration water tank loop structure | |
| CN203204467U (en) | Programmed temperature lowering instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 201206 Pudong New Area Jinqiao Ning Road, Shanghai, No. 888 Applicant after: Shanghai Haili Electrical Appliance Co. Ltd. Address before: 201206 Pudong New Area Jinqiao Ning Road, Shanghai, No. 888 Applicant before: Rili Electric Appliance Co., Ltd., Shanghai |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |