CN106969520A - A kind of double loop handpiece Water Chilling Units and dual temperature cooling system - Google Patents
A kind of double loop handpiece Water Chilling Units and dual temperature cooling system Download PDFInfo
- Publication number
- CN106969520A CN106969520A CN201710267267.0A CN201710267267A CN106969520A CN 106969520 A CN106969520 A CN 106969520A CN 201710267267 A CN201710267267 A CN 201710267267A CN 106969520 A CN106969520 A CN 106969520A
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- temperature
- water
- pipeline
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- water tank
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
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- 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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
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- 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
- F25B41/30—Expansion means; Dispositions thereof
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- 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
- F25B2400/07—Details of compressors or related parts
- F25B2400/072—Intercoolers therefor
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a kind of double loop handpiece Water Chilling Units and dual temperature cooling system, for equipment cooling, including water tank and by pipeline by compressor, evaporator, condenser, the compression refrigeration cycle that choke valve is connected, water tank is divided into main water box and secondary water tank, evaporator is located in main water box, main water box is circumscribed with low temperature water circulation supply circuit, secondary water tank is circumscribed with high temperature water circulation supply circuit, the temperature-compensating pipeline for leading to secondary water tank is connected on the outlet pipeline of low temperature water circulation supply circuit, temperature sensor is provided with secondary water tank, temperature-compensating pipeline is provided with the control valve being connected with temperature sensor signal.Water tank is divided into main water box and secondary water tank by the present invention, two circulating water loops are connected in two water tanks respectively, and in secondary water tank, temperature sensor is set, control valve is controlled to open when secondary water tank temperature is too high, the output water of low temperature is inputted into secondary water tank by temperature-compensating pipeline to be cooled down to high temperature circulation water.
Description
Technical field
The present invention relates to refrigerating field, more particularly to a kind of double loop handpiece Water Chilling Units and dual temperature cooling system.
Background technology
Water-cooled cooling water machine is to utilize the principle for compressing refrigeration to circulating water cooling, and makes the low-temperature circulating water and sky of output
Adjust unit or carry out the mode of heat exchange with cold terminal come work.Sometimes there are two user terminals in some scenarios,
Need to provide two kinds of discrepant recirculated waters of temperature, otherwise existing way is two sets of units of configuration to meet needs, but should
The equipment cost that method needs is higher；It is, using the scheme disclosed in CN 201463385U, to be returned in low-temperature circuit and high temperature
Set scale integrates triple valve between road so that the backwater of the relative low temperature in low-temperature circuit can directly enter high-temperature circuit
In, but which is difficult to temperature and accurately controlled, the temperature of the demand of high temperature user terminal is not readily available guarantor
Barrier.
The content of the invention
In order to solve the above problems, it is an object of the invention to provide a kind of double loop handpiece Water Chilling Units, be conducive to ensureing high
The demand cold of warm user terminal.
The technical solution adopted in the present invention is：
A kind of double loop handpiece Water Chilling Units, including water tank and by pipeline by compressor, evaporator, condenser, choke valve connect
The compression refrigeration cycle got up, the water tank is divided into main water box and secondary water tank, and evaporator is located in main water box, main water
Case is circumscribed with low temperature water circulation supply circuit, and secondary water tank is circumscribed with high temperature water circulation supply circuit, low temperature water circulation supply circuit
Outlet pipeline on be connected to the temperature-compensating pipeline for leading to secondary water tank, temperature sensor, temperature-compensating pipeline are provided with secondary water tank
Provided with the control valve being connected with temperature sensor signal.
As a further improvement on the present invention, low temperature water pump is connected on the outlet pipeline of low temperature water circulation supply circuit, temperature
Degree compensation conduit is connected on the export pipeline of low temperature water pump.
As a further improvement on the present invention, the compression refrigeration cycle is provided with pressure maintenance valve, the pressure
Maintain valve on the export pipeline of compressor and pressure maintenance valve is communicated with the interface of suction port of compressor pipeline.
As a further improvement on the present invention, the main water box is additionally provided with filling pipe, and filling pipe is provided with filter.
As a further improvement on the present invention, the pipeline and high temperature water circulation of the low temperature water circulation supply circuit are supplied back to
The pipeline outer wall on road is coated with heat-insulation layer.
As a further improvement on the present invention, the compression refrigeration cycle is two-stage compression refrigeration circulation loop.
As a further improvement on the present invention, the choke valve includes first throttle valve and second throttle, the compression
Machine includes low pressure compressor and high pressure compressor, low pressure compressor, high pressure compressor, condenser, first throttle valve, the second throttling
Valve, evaporator are sequentially communicated to form two-stage compression refrigeration circulation loop by pipeline.
As a further improvement on the present invention, the two-stage compression refrigeration circulation loop also includes intercooler unit, institute
Stating intercooler unit has low-pressure inlet, low tension outlet, high pressure entry and high-pressure outlet, and low-pressure inlet leads to low pressure compression
Machine, low tension outlet leads to high pressure compressor, and high pressure entry leads to first throttle valve, and high-pressure outlet leads to second throttle.
As a further improvement on the present invention, the intercooler unit includes heat exchanger and stainless steel, high-pressure outlet
It is located at high pressure entry on heat exchanger, low-pressure inlet and low tension outlet are located in stainless steel, and heat exchanger and stainless steel pass through
Pipeline is connected.
The present invention also provides a kind of dual temperature cooling system, and its technical scheme used is：
A kind of dual temperature cooling system, includes the user terminal of two kinds of different temperatures of demand, and above-mentioned double loop handpiece Water Chilling Units,
The relatively low user terminal of low temperature water circulation supply circuit connection requirement temperature, high temperature water circulation supply circuit connection requirement temperature compared with
High user terminal.
The beneficial effects of the invention are as follows：Water tank is divided into main water box and secondary water tank, two water tanks by the present invention to be connected respectively
Two circulation loops, and temperature sensor is set in secondary water tank, control control valve to open when secondary water tank temperature is too high, low temperature
Output water inputted by temperature-compensating pipeline into secondary water tank high temperature circulation water cooled down, until the water body of secondary water tank reaches
To suitable value range.
Brief description of the drawings
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the schematic diagram of handpiece Water Chilling Units first embodiment；
Fig. 2 is the schematic diagram of handpiece Water Chilling Units second embodiment；
Fig. 3 is the schematic diagram of handpiece Water Chilling Units 3rd embodiment.
Embodiment
Double loop handpiece Water Chilling Units as shown in Figure 1 to Figure 3, including water tank and compression refrigeration cycle.Compression refrigeration
Circulation loop at least has compressor, evaporator 1, condenser 2, choke valve and the pipeline for connecting these parts, pressure
Contracting refrigeration cycle belongs to the conventional techniques of this area, is not described here in detail.
Water tank is separated into main water box 3 and secondary water tank 4 by one piece of vertical dividing plate.Above-mentioned evaporator 1 is located at main water box 3
It is interior, the recirculated water in main water box 3 can be freezed.Main water box 3 is circumscribed with low temperature water circulation supply circuit, due to being used as low-temperature receiver
Evaporator 1 is located in main water box 3, and it is relatively low that the water at low temperature after refrigeration is delivered to demand temperature by low temperature water circulation supply circuit
User terminal, is back to main water box 3 after then absorbing heat, is cooled again by evaporator 1.
Above-mentioned secondary water tank 4 is circumscribed with high temperature water circulation supply circuit, and the higher user terminal of demand temperature is by secondary water tank 4
In the higher recirculated water of temperature carry out cooling.Due to continuous heat absorption, temperature can be raised constantly water body in secondary water tank 4, be
Its relatively low water temperature is kept, embodiment is cooled by the water body in 5 pairs of secondary water tanks 4 of temperature-compensating pipeline.
Described temperature-compensating pipeline 5 has arrival end and output end, its arrival end connection low temperature water circulation supply circuit
Outlet pipeline, its port of export auxiliary connection water tank 4 and the inner chamber for leading to secondary water tank 4 are additionally provided with temperature sensor in secondary water tank 4
19, temperature-compensating pipeline 5 is provided with the control valve 6 being connected with the signal of temperature sensor 19.
Thus, evaporator 1 constantly cools to the water body of main water box 3, treats that the temperature sensor 19 of secondary water tank 4 detects water temperature
After setting value, instruction control control valve 6 is sent by host computer and opened, in the middle part of the outlet pipeline of low temperature water circulation supply circuit
The water at low temperature divided is delivered to the water mixing in secondary water tank 4 with secondary water tank 4 by temperature-compensating pipeline 5, so that in secondary water tank 4
Water body（High temperature circulation water）Cooled.The process of said temperature compensation is until temperature sensor 19 detects secondary water tank 4
Water reaches another setting value.
During temperature-compensating, the water level of secondary water tank 4 can be raised constantly, therefore, position higher on dividing plate can be with
A spout hole 20 is opened up, main water box 3 can be automatically flowed into when the water level of secondary water tank 4 reaches spout hole 20.
Above-mentioned control valve 6 can be magnetic valve；Temperature sensor 21 also is provided with above-mentioned main water box 3, according to main water
The refrigerating capacity of refrigeration cycle is entirely compressed in the water temperature control of case 3.
Because the part that the water temperature in secondary water tank 4 is the low-temperature circulating water exported by main water box 3 is cooled, simultaneously
Ensure that the volume of above-mentioned main water box 3 is more than the volume of secondary water tank 4, typically as the demand of cold more sufficient user terminal is needed
For more than twice.
It is further preferred that being connected to low temperature water pump 7, temperature-compensating pipeline on the outlet pipeline of low temperature water circulation supply circuit
5 are connected on the export pipeline of low temperature water pump 7, and the water return pipeline of low temperature water circulation supply circuit is additionally provided with water flow switch 22.High temperature
High-temperature water pump 23 is also connected on the outlet pipeline of water circulation supply circuit simultaneously.
It is further preferred that main water box 3 is additionally provided with and filling pipe (not shown), for whole handpiece Water Chilling Units replenishment cycles
Water, filling pipe is provided with filter, and the filtering of preliminary or depth is carried out to the recirculated water entered in unit, it is to avoid incrustation or
The influence that impurity is produced to each part of unit.
It is further preferred that the pipeline of low temperature water circulation supply circuit and the pipeline outer wall of high temperature water circulation supply circuit are equal
It is coated with and heat-insulation layer (not shown), loss of the cold in pipeline is reduced, so as to save the energy to a certain extent.
In first embodiment shown in Fig. 1, compressor, choke valve only have separate unit, single, the compressor 24 in such as Fig. 1
With choke valve 25, it is single-stage refrigeration loop thus to compress refrigeration cycle, and handpiece Water Chilling Units disclosure satisfy that general air-conditioner set, use
The demand of family terminal.
In second embodiment and 3rd embodiment as shown in Figures 2 and 3, compression refrigeration cycle is Two-stage Compression
Refrigeration cycle, can be applied to the demand of deep refrigerating.
In two-stage compression refrigeration circulation loop, choke valve has two, including first throttle valve 9 and second throttle 10,
Compressor has two, including low pressure compressor 11 and high pressure compressor 12.Low pressure compressor 11, high pressure compressor 12, condenser
2nd, first throttle valve 9, second throttle 10, evaporator 1 are sequentially communicated by pipeline is recycled back to so as to form two-stage compression refrigeration
Road.
With reference to Fig. 2, two-stage compression refrigeration circulation loop also includes intercooler unit, and intercooler unit is a centre
Cooler 26, it has low-pressure inlet 13, low tension outlet 14, high pressure entry 15 and high-pressure outlet 16, and low-pressure inlet 13 leads to low
Compressor 11 is pressed, low tension outlet 14 leads to high pressure compressor 12, and high pressure entry 15 leads to first throttle valve 9, and high-pressure outlet 16 leads to
To second throttle 10.
During work, the steam of evaporator 1 is sucked by low pressure compressor 11, is compressed to intermediate pressure and by low-pressure inlet 13
Into intercooler, the dry saturated steam come out with intercooler 26 is mixed and exported from low tension outlet 14；High pressure afterwards
Compressor 12 sucks mixed gas, compressed to entering condenser 2 after condensing pressure；Condensed high pressure refrigerant liquid is passed through
Cooled down again from high pressure entry 15 into intercooler 26 after first throttle valve 9；Exported afterwards from high-pressure outlet 16 through
Two choke valves 10 enter the heat absorption evaporation of evaporator 1.
With reference to Fig. 3 3rd embodiment, the construction of intercooler unit is with the difference of second embodiment.3rd
In embodiment, intercooler unit includes heat exchanger 17 and stainless steel 18, heat exchanger 17 can for plate type heat exchanger 17 or
Other kinds of heat exchanger 17.High-pressure outlet 16 and high pressure entry 15 are located on heat exchanger 17, low-pressure inlet 13 and low tension outlet
14 are located in stainless steel 18, and heat exchanger 17 and stainless steel 18 are connected by pipeline.
In the embodiment, stainless steel 18 is arranged at before high pressure compressor 12, with heat exchanger 17 as intercooler, from
The gas that heat exchanger 17 and low pressure compressor 11 are discharged can be mixed in stainless steel 18 to be sucked by high pressure compressor 12 again, is protected
Gas is demonstrate,proved（Refrigerant）It is well mixed in stainless steel 18, in pipeline.
On the basis of above example, pressure maintenance valve 8 is additionally provided with compression refrigeration cycle.As shown in figure 1, pressure
Power maintains valve 8 on the export pipeline of compressor 24 and pressure maintenance valve 8 is communicated with the interface of suction port of compressor pipeline.When
After compressor 24 is started shooting, can enough height pressure differences of resume in a short time, reach compressor minimum safe fuel feeding differential pressure requirements,
Ensure that compressor will not produce catastrophe failure because mistake oil or fuel feeding are bad, reach the mesh for the reliability for improving machine set system
's.
As shown in Figures 2 and 3, in second embodiment and 3rd embodiment, pressure maintenance valve 8 is arranged at low pressure compressor
On 11 export pipeline, and the entrance pipe of the orifice low pressure compressor 11 of pressure maintenance valve 8.Certainly, high pressure compressor
12 correspondence position can also set corresponding pressure maintenance valve 8, to reach identical effect.
Above-described handpiece Water Chilling Units can be used in dual temperature cooling system, and the dual temperature cooling system includes two user's ends
Low temperature water circulation supply circuit in end, each two kinds of different temperature of user terminal demand, above-mentioned double loop handpiece Water Chilling Units
The relatively low user terminal of connection requirement temperature, the higher user terminal of high temperature water circulation supply circuit connection requirement temperature.It is above-mentioned
User terminal can be the equipment such as air-conditioning.
The simply preferred embodiment of the present invention described above, it does not constitute limiting the scope of the invention.
Claims (10)
1. a kind of double loop handpiece Water Chilling Units, including water tank and by pipeline by compressor, evaporator (1), condenser (2), section
The compression refrigeration cycle that stream valve is connected, it is characterised in that：The water tank is divided into main water box (3) and secondary water tank
(4), evaporator (1) is located in main water box (3), and main water box (3) is circumscribed with low temperature water circulation supply circuit, and secondary water tank (4) is external
Have and the temperature for leading to secondary water tank (4) benefit is connected on high temperature water circulation supply circuit, the outlet pipeline of low temperature water circulation supply circuit
Repay and temperature sensor is provided with pipeline (5), secondary water tank (4), temperature-compensating pipeline (5) is provided with to be connected with temperature sensor signal
Control valve (6).
2. double loop handpiece Water Chilling Units according to claim 1, it is characterised in that：The outlet pipe of low temperature water circulation supply circuit
Low temperature water pump (7) is connected on road, temperature-compensating pipeline (5) is connected on the export pipeline of low temperature water pump (7).
3. double loop handpiece Water Chilling Units according to claim 1, it is characterised in that：The compression refrigeration cycle is provided with
Pressure maintenance valve (8), the pressure maintenance valve (8) is located on the export pipeline of compressor and pressure maintenance valve (8) is communicated with
The interface of suction port of compressor pipeline.
4. double loop handpiece Water Chilling Units according to claim 1, it is characterised in that：The main water box (3) is additionally provided with filling pipe,
Filling pipe is provided with filter.
5. double loop handpiece Water Chilling Units according to claim 1, it is characterised in that：The pipe of the low temperature water circulation supply circuit
The pipeline outer wall of road and high temperature water circulation supply circuit is coated with heat-insulation layer.
6. the double loop handpiece Water Chilling Units according to claim 1 or 2 or 3 or 4 or 5, it is characterised in that：The compression refrigeration is followed
Loop back path is two-stage compression refrigeration circulation loop.
7. double loop handpiece Water Chilling Units according to claim 6, it is characterised in that：The choke valve includes first throttle valve
(9) and second throttle (10), the compressor includes low pressure compressor (11) and high pressure compressor (12), low pressure compressor
(11), high pressure compressor (12), condenser (2), first throttle valve (9), second throttle (10), evaporator (1) pass through pipeline
It is sequentially communicated to form two-stage compression refrigeration circulation loop.
8. double loop handpiece Water Chilling Units according to claim 7, it is characterised in that：The two-stage compression refrigeration circulation loop is also
Including intercooler unit, the intercooler unit have low-pressure inlet (13), low tension outlet (14), high pressure entry (15) and
High-pressure outlet (16), low-pressure inlet (13) leads to low pressure compressor (11), and low tension outlet (14) leads to high pressure compressor (12), high
Press-in mouth (15) leads to first throttle valve (9), and high-pressure outlet (16) leads to second throttle (10).
9. double loop handpiece Water Chilling Units according to claim 8, it is characterised in that：The intercooler unit includes heat exchanger
(17) and stainless steel (18), high-pressure outlet (16) and high pressure entry (15) are located on heat exchanger (17), low-pressure inlet (13) and
Low tension outlet (14) is located in stainless steel (18), and heat exchanger (17) and stainless steel (18) are connected by pipeline.
10. a kind of dual temperature cooling system, it is characterised in that：Include the user terminal of two kinds of different temperatures of demand, and right will
The double loop handpiece Water Chilling Units any one of 1 to 9 are sought, the relatively low user of low temperature water circulation supply circuit connection requirement temperature is whole
End, the higher user terminal of high temperature water circulation supply circuit connection requirement temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710267267.0A CN106969520A (en) | 2017-04-21 | 2017-04-21 | A kind of double loop handpiece Water Chilling Units and dual temperature cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710267267.0A CN106969520A (en) | 2017-04-21 | 2017-04-21 | A kind of double loop handpiece Water Chilling Units and dual temperature cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106969520A true CN106969520A (en) | 2017-07-21 |
Family
ID=59333979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710267267.0A Pending CN106969520A (en) | 2017-04-21 | 2017-04-21 | A kind of double loop handpiece Water Chilling Units and dual temperature cooling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106969520A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894742A (en) * | 2019-04-24 | 2019-06-18 | 珠海格力电器股份有限公司 | Cooling device |
| CN110319620A (en) * | 2019-06-26 | 2019-10-11 | 珠海格力电器股份有限公司 | Machine tool cooling unit and control method thereof |
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| CN206755642U (en) * | 2017-04-21 | 2017-12-15 | 广州翔捷仪器有限公司 | A kind of double loop handpiece Water Chilling Units and dual temperature cooling system |
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2017
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| CN203336880U (en) * | 2013-04-23 | 2013-12-11 | 深圳市大族激光科技股份有限公司 | Double-temperature and double-circulation water cooling machine |
| CN203642546U (en) * | 2013-12-31 | 2014-06-11 | 广州欧亚制冷设备制造有限公司 | Industrial water chilling unit accurate in temperature |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894742A (en) * | 2019-04-24 | 2019-06-18 | 珠海格力电器股份有限公司 | Cooling device |
| CN110319620A (en) * | 2019-06-26 | 2019-10-11 | 珠海格力电器股份有限公司 | Machine tool cooling unit and control method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 510530 Guanda Road, Huangpu District, Guangzhou City, Guangdong Province Applicant after: Guangzhou Xiang Jie refrigeration equipment Co., Ltd. Address before: 510665 Dong Hong business building, No. 4 Tong Dong Road, Zhongshan Road, Guangzhou, Guangdong, B520-1, Tianhe District Applicant before: Guangzhou Xiang Jie Instrument Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170721 |