CN204063356U - The indoor and outdoor machine tube connector of Split heat pump and refrigeration plant - Google Patents
The indoor and outdoor machine tube connector of Split heat pump and refrigeration plant Download PDFInfo
- Publication number
- CN204063356U CN204063356U CN201420248899.4U CN201420248899U CN204063356U CN 204063356 U CN204063356 U CN 204063356U CN 201420248899 U CN201420248899 U CN 201420248899U CN 204063356 U CN204063356 U CN 204063356U
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- CN
- China
- Prior art keywords
- linkage section
- interlude
- indoor
- tube connector
- outdoor machine
- 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.)
- Expired - Lifetime
Links
- 238000005057 refrigeration Methods 0.000 title claims abstract description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 73
- 229910052802 copper Inorganic materials 0.000 claims abstract description 73
- 239000010949 copper Substances 0.000 claims abstract description 73
- 238000007789 sealing Methods 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- 229910052782 aluminium Inorganic materials 0.000 description 11
- 238000005219 brazing Methods 0.000 description 7
- 239000004411 aluminium Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000003507 refrigerant Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 229910017767 Cu—Al Inorganic materials 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 150000001398 aluminium Chemical class 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- JOHZPMXAZQZXHR-UHFFFAOYSA-N pipemidic acid Chemical compound N1=C2N(CC)C=C(C(O)=O)C(=O)C2=CN=C1N1CCNCC1 JOHZPMXAZQZXHR-UHFFFAOYSA-N 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The indoor and outdoor machine tube connector of a kind of Split heat pump and refrigeration plant, described tube connector is full copper connecting tube, linkage section in the two ends of described tube connector are respectively equipped with and are connected with indoor set, the outer linkage section be connected with off-premises station, described full copper connecting tube comprises interlude, one end of described interlude is fixedly connected with described interior linkage section, the other end of described interlude is fixedly connected with described outer linkage section, and in the wall ratio of described interlude, the wall thickness of linkage section, outer linkage section is little.The utility model provides the indoor and outdoor machine tube connector of a kind of Split heat pump of effectively reducing costs under the prerequisite guaranteeing serviceability and refrigeration plant.
Description
Technical field
The utility model relates to a kind of Split heat pump and refrigeration plant, especially a kind of indoor and outdoor machine tube connector.
Background technology
Split heat pump and refrigeration plant, such as split-type air conditioner, indoor set is connected with off-premises station and needs to use tube connector, and conventional tube connector is full copper connecting tube, Cu-Al connecting pipe or full aluminium connecting tubes.
Full copper connecting tube is the connecting pipe of a kind of air conditioning chamber internal-external machine refrigerant transmission, be generally two pipes with the use of, the gaseous coolant of a Pipe transfer low-temp low-pressure, the liquid refrigerants of a Pipe transfer HTHP.Current copper valency height enterprise, air conditioner connecting pipe price is higher, so a lot of producer carries out cost declining by two kinds of modes.First kind of way subtracts wall thickness, and the second way is that Cu-Al connecting pipe or full aluminum pipe carry out alternative original full copper connecting tube.
It is need with indoor and outdoor machine junction to crimp or enlarging is connected that full copper connecting tube subtracts wall thickness produced problem, and copper pipe is thinning easily occurs crackle in crimping and enlarging place afterwards, easily causes secondary refrigerant leakage, and can the attenuating of telephone-moving number of times.
Adopt Cu-Al connecting pipe to substitute full copper connecting tube to have problems equally and cannot avoid.First the potential difference at copper aluminium welding place causes the aluminum pipe at this place easily to corrode.Secondly due to the needs of cost, the fine aluminium series aluminum pipe that aluminum tube sections uses continuous extruding technology to produce, coarse grains, density is low, prevents the ability of corrosion very low, so general factory is in order to evade application risk, copper aluminium welding place uses PUR to seal, all the other aluminum tube sections use heat shrinking sleeve to carry out isolating with external environment, but if accidentally punctured by sharp thing in production, transport and assembling process, then this kind of safeguard procedures do not have protective action.
Adopt full aluminium connecting tubes to substitute full copper connecting tube to have problems too, copper aluminium potential difference is there is at tube connector and indoor and outdoor machine junction, easily cause electrochemical corrosion, the mechanical performance of aluminium is far away from copper pipe in addition, mechanical properties decrease is easily caused man-hour to cause decline service life adding junction inside and outside city, reliability decrease.
Summary of the invention
In order to overcome the deficiency cannot taking into account cost and serviceability of the indoor and outdoor machine tube connector of existing Split heat pump and refrigeration plant, the utility model provides the indoor and outdoor machine tube connector of a kind of Split heat pump of effectively reducing costs under the prerequisite guaranteeing serviceability and refrigeration plant.
The utility model solves the technical scheme that its technical problem adopts:
The indoor and outdoor machine tube connector of a kind of Split heat pump and refrigeration plant, described tube connector is full copper connecting tube, linkage section in the two ends of described tube connector are respectively equipped with and are connected with indoor set, the outer linkage section be connected with off-premises station, described full copper connecting tube comprises interlude, one end of described interlude is fixedly connected with described interior linkage section, the other end of described interlude is fixedly connected with described outer linkage section, and in the wall ratio of described interlude, the wall thickness of linkage section, outer linkage section is little.
Further, the wall thickness of described interlude be meet need with pressure, percentage elongation and installation time the bending performance copper pipe wall thickness that requires, the wall thickness of described interior linkage section, outer linkage section be meet percentage elongation, anti-shake performance, with the sealing property of indoor and outdoor machine cooperation place, the copper pipe wall thickness of Reusability performance requirement.
Further, the wall thickness of described interior linkage section, outer linkage section is equal.This structure belongs to conventional or preferred version, certainly, according to different occasion needs, and also can be unequal.
Further again, one end of described interlude is welded with described interior linkage section, and the other end of described interlude welds with described outer linkage section.
Or: one end and the described interior linkage section of described interlude are mechanically connected by securing member, and the other end and the described outer linkage section of described interlude are mechanically connected by securing member.
Again or: one end and the described interior linkage section of described interlude fit tightly, and the other end and the described outer linkage section of described interlude fit tightly.
Or be: one end of described interlude and described interior linkage section are in one, and the other end of described interlude and described outer linkage section are in one.
In above-mentioned connected mode, the two ends of described intermediate ends are identical with the connected mode of described inside and outside linkage section, certainly, also difference can be chosen as, two ends and the connected mode of described inside and outside linkage section of described intermediate ends are respectively wherein two kinds in above-described mode (weld, be mechanically connected, fit tightly or one), such as: one end and the described interior linkage section of described interlude are mechanically connected by securing member, the other end of described interlude and described outer linkage section are in one etc.
Interlude is than a kind of scheme of end walls thickness: the external diameter of described interlude is equal with the external diameter of described interior linkage section, outer linkage section, and the internal diameter of described interlude is larger than the internal diameter of described interior linkage section, outer linkage section.
Interlude is than another scheme of end walls thickness: the internal diameter of described interlude is equal with the internal diameter of described interior linkage section, outer linkage section, and the external diameter of described interlude is less than the external diameter of described interior linkage section, outer linkage section.
Interlude is than another scheme of end walls thickness: the external diameter of described interlude is less than the external diameter of described interior linkage section, outer linkage section, and the internal diameter of described interlude is larger than the internal diameter of described interior linkage section, outer linkage section.
Technical conceive of the present utility model is: design different wall thickness according to the performance requirement of tube connector different piece, not only meets mechanical property, antiseptic power and install convenient requirement but also can reduce copper consumption, reduce costs.
Full copper connecting tube two ends copper pipe is thick, and middle copper pipe wall thickness is thin.Two ends copper pipe is used to be connected with air conditioning chamber's internal-external machine, need reliable extensibility, plastic deformability, anti-shake performance, with sealing property and the Reusability performance (telephone-moving number of times requires) of indoor and outdoor machine cooperation place, so copper pipe wall thickness design in two ends not only will consider to meet above-mentioned requirements and will have certain surplus, be exactly briefly two ends copper pipe wall thickness.Allowable pressure, percentage elongation and the bending performance requirement when installing mainly are considered in middle copper pipe wall thickness design, relative to the copper pipe at two ends, require that reduction is many, so the copper pipe wall thickness of centre is thinner than two ends copper pipe wall thickness.
Two ends heavy wall copper pipe and middle thin-wall copper pipe are realized by kinds of processes such as mechanical connection, welding, metal forming, castings.
The beneficial effects of the utility model are mainly manifested in: effectively reduce costs under the prerequisite guaranteeing serviceability, practicality is good.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the indoor and outdoor machine tube connector of a kind of Split heat pump and refrigeration plant.
Fig. 2 is the schematic diagram of the indoor and outdoor machine tube connector of another kind of Split heat pump and refrigeration plant.
Fig. 3 is the schematic diagram of the indoor and outdoor machine tube connector of another Split heat pump and refrigeration plant.
Fig. 4 is a kind of interior linkage section or the connection diagram between outer linkage section and interlude.
Fig. 5 is another kind of interior linkage section or the connection diagram between outer linkage section and interlude.
Fig. 6 is the another kind of version schematic diagram of interior linkage section, outer linkage section or interlude.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described.
With reference to Fig. 1 ~ Fig. 6, the indoor and outdoor machine tube connector of a kind of Split heat pump and refrigeration plant, described tube connector is full copper connecting tube, linkage section 1 in the two ends of described tube connector are respectively equipped with and are connected with indoor set, the outer linkage section 2 be connected with off-premises station, described full copper connecting tube comprises interlude 3, one end of described interlude 3 is fixedly connected with described interior linkage section 1, the other end of described interlude 3 is fixedly connected with described outer linkage section 2, and in the wall ratio of described interlude 3, the wall thickness of linkage section 1, outer linkage section 2 is little.
Further, the wall thickness of described interlude 3 be meet need with pressure, percentage elongation and installation time the bending performance copper pipe wall thickness that requires, the wall thickness of described interior linkage section 1, outer linkage section 2 be meet percentage elongation, anti-shake performance, with the sealing property of indoor and outdoor machine cooperation place, the copper pipe wall thickness of Reusability performance requirement.
Further, the wall thickness of described interior linkage section 1, outer linkage section 2 is equal.This structure belongs to conventional or preferred version, certainly, according to different occasion needs, and also can be unequal.
Described interior linkage section 1, outer linkage section 2 can be the homogeneous copper pipes of wall thickness, also can be according to using, processing characteristics needs the single copper pipe that wall thickness, external diameter, shape carried out changing or multistage copper pipe to be combined into, as ladder pipe, bellows etc., shape of cross section is circular or is not circular.
Described interlude 3 can be the homogeneous copper pipe of wall thickness, also can be need the single copper pipe that wall thickness, external diameter, shape carried out changing or multistage copper pipe to be combined into according to serviceability, processing, as ladder pipe, bellows etc., shape of cross section is circular or is not circular.The wall thickness of interlude 3 described in described interior linkage section 1, the wall ratio of outer linkage section 2 refer to greatly copper pipe two ends and indoor and outdoor machine interface do not carry out necessary processing before the original thickness of (processing mode is as enlarging, drawing etc.) thicker than middle copper pipe thinnest part.
Further again, one end of described interlude 3 is welded with described interior linkage section 1, and the other end of described interlude 3 welds with described outer linkage section 2.Pass through welding manner, the copper pipe of different wall is welded together, or needs to weld together by auxiliary tube, as being welded in object stainless steel tube, copper pipe reaching connection respectively according to technique, also can be divided into several sections of machine-shapings by thin from wall thickness to wall for copper pipe, then weld together.
Welding manner mainly contains but is not limited to soldering (soldering is divided into again furnace brazing, gas brazing, induction brazing, resistance brazing, laser braze welding, resistance brazing, infrared brazing, arc brazing), melting welding (arc welding, gas welding, electroslag welding, electron beam welding, Laser Welding) pressure welding (friction weldering, explosive welding (EW), diffusion welding (DW), induction welding, supersonic welding, cold welding, electric resistance welding) etc.
Or: one end and the described interior linkage section 1 of described interlude 3 are mechanically connected by securing member, and the other end and the described outer linkage section 2 of described interlude 3 are mechanically connected by securing member.Mechanical connection is exactly utilize mechanical device to carry out card pressure thin-wall copper pipe and heavy wall copper pipe to be socketed or docking, in order to sealing effectiveness, this connected mode may need sealing ring and inside and outside lining pipe jointly to complete, and mechanical connection manner mainly contains but is not limited to plug-in, clamping hoop type, socket joint type etc.
Again or: one end and the described interior linkage section of described interlude fit tightly, and the other end and the described outer linkage section of described interlude fit tightly.Gradient is done in light-wall pipe, thick-walled pipe relative engagement face, carries out diffusion, extruding or drawing, these two kinds of different wall are fitted tightly together, in order to sealing effectiveness, fluid sealant may be smeared in junction.
Or be: one end of described interlude and described interior linkage section are in one, and the other end of described interlude and described outer linkage section are in one.Plastic forming mode can be adopted: utilize metal forming principle, the copper pipe of a wall thickness such as grade is carried out partial mold shaping, likely by thinning for heavy wall copper pipe mid portion, also likely make thin-wall copper pipe two ends thickening, realize the type shape of a thick intermediate thin in copper pipe two ends.Which advantage is that full copper connecting tube is by whole copper pipe processing out, and between thin-walled portion and thick wall part is continuous transition, do not exist occur transition portion and substrate performance inconsistent.And the transition portion of mechanical connection is discontinuous, there is decay in the transition portion performance that welding manner is formed.Or casting: by this two ends wall thickness, the direct casting of full copper connecting tube that midfeather is thin.
In above-mentioned connected mode, the two ends of described intermediate ends are identical with the connected mode of described inside and outside linkage section, certainly, also difference can be chosen as, two ends and the connected mode of described inside and outside linkage section of described intermediate ends are respectively wherein two kinds in above-described mode (weld, be mechanically connected, fit tightly or one), such as: one end and the described interior linkage section of described interlude are mechanically connected by securing member, the other end of described interlude and described outer linkage section are in one etc.
With reference to Fig. 1, interlude is than a kind of scheme of end walls thickness: the external diameter of described interlude is equal with the external diameter of described interior linkage section, outer linkage section, and the internal diameter of described interlude is larger than the internal diameter of described interior linkage section, outer linkage section.
With reference to Fig. 2, interlude is than another scheme of end walls thickness: the internal diameter of described interlude is equal with the internal diameter of described interior linkage section, outer linkage section, and in described in the ratio of described interlude external diameter, the external diameter of linkage section, outer linkage section is little.
With reference to Fig. 3, interlude is than another scheme of end walls thickness: the external diameter of described interlude is less than the external diameter of described interior linkage section, outer linkage section, and the internal diameter of described interlude is larger than the internal diameter of described interior linkage section, outer linkage section.
In this version, with reference in Fig. 1 ~ Fig. 3, interlude selects the mode waiting wall thickness usually; Certainly, middle-end end also can be the situation that wall thickness is not identical, and the both sides wall thickness of such as interlude is comparatively large, and middle body wall thickness is less, middle body also can adopt with the connected mode of both sides weld, be mechanically connected, fit tightly, one-body molded etc.
With reference to Fig. 4 and Fig. 5, conveniently weld with thin-wall copper pipe and coordinate or other instructions for use, thick-walled pipe may carry out 1 ~ 5 expanding or undergauge; Equally also likely on thin-wall copper pipe, carry out similar machining, or on heavy wall copper pipe and thin-wall copper pipe, carry out above-mentioned processing simultaneously simultaneously.This changeover portion, as there is processing difficulties, is not got rid of such expanding, undergauge processing and is completed by a bit of copper pipe and connected and be connected on heavy wall copper pipe or thin-wall copper pipe.
With reference to Fig. 6, be convenient to during in order to install bending or other consider, heavy wall copper pipe may process one section of bellows, as shown in Figure 6 or similar.In like manner, thin-wall copper pipe also likely processes so one section of bellows.
The present embodiment has considered refrigeration system need use pressure, enlarging performance to tube connector, the composite request of buckling performance, the utility model is identical with original copper pipe wall thickness with the copper pipe wall thickness of indoor and outdoor machine junction, the middle copper pipe wall thickness reduction mainly bearing refrigerant transmission, form two ends and indoor and outdoor machine joint wall thickness slightly, the structure of midfeather thickness.So both meet interface and be not easy the performance requirements such as expansion is split, vibration resistance, again because whole piece tube connector is full copper material, do not need to carry out preservative treatment, seamless substituting can be carried out to the full copper connecting tube of original heavy wall.
Tube connector of the present utility model is applied in but is not limited to Split heat pump, refrigeration, air-conditioning, heat pipe field, bears the refrigerant transformation task connected between off-premises station and indoor set.
Claims (10)
1. the indoor and outdoor machine tube connector of a Split heat pump and refrigeration plant, described tube connector is full copper connecting tube, linkage section in the two ends of described tube connector are respectively equipped with and are connected with indoor set, the outer linkage section be connected with off-premises station, it is characterized in that: described full copper connecting tube comprises interlude, one end of described interlude is fixedly connected with described interior linkage section, the other end of described interlude is fixedly connected with described outer linkage section, and in the wall ratio of described interlude, the wall thickness of linkage section, outer linkage section is little.
2. the indoor and outdoor machine tube connector of Split heat pump as claimed in claim 1 and refrigeration plant, it is characterized in that: the wall thickness of described interlude be meet need with pressure, percentage elongation and installation time the bending performance copper pipe wall thickness that requires, the wall thickness of described interior linkage section, outer linkage section be meet percentage elongation, plastic deformability, anti-shake performance, with the sealing property of indoor and outdoor machine cooperation place, the copper pipe wall thickness of Reusability performance requirement.
3. the indoor and outdoor machine tube connector of Split heat pump as claimed in claim 1 or 2 and refrigeration plant, is characterized in that: the wall thickness of described interior linkage section, outer linkage section is equal.
4. the indoor and outdoor machine tube connector of Split heat pump as claimed in claim 1 or 2 and refrigeration plant, it is characterized in that: one end of described interlude is welded with described interior linkage section, the other end of described interlude welds with described outer linkage section.
5. the indoor and outdoor machine tube connector of Split heat pump as claimed in claim 1 or 2 and refrigeration plant, it is characterized in that: one end and the described interior linkage section of described interlude are mechanically connected by securing member, the other end and the described outer linkage section of described interlude are mechanically connected by securing member.
6. the indoor and outdoor machine tube connector of Split heat pump as claimed in claim 1 or 2 and refrigeration plant, it is characterized in that: one end and the described interior linkage section of described interlude fit tightly, the other end and the described outer linkage section of described interlude fit tightly.
7. the indoor and outdoor machine tube connector of Split heat pump as claimed in claim 1 or 2 and refrigeration plant, is characterized in that: one end of described interlude and described interior linkage section are in one, and the other end of described interlude and described outer linkage section are in one.
8. the indoor and outdoor machine tube connector of Split heat pump as claimed in claim 3 and refrigeration plant, it is characterized in that: the external diameter of described interlude is equal with the external diameter of described interior linkage section, outer linkage section, the internal diameter of described interlude is larger than the internal diameter of described interior linkage section, outer linkage section.
9. the indoor and outdoor machine tube connector of Split heat pump as claimed in claim 3 and refrigeration plant, it is characterized in that: the internal diameter of described interlude is equal with the internal diameter of described interior linkage section, outer linkage section, in described in the ratio of described interlude external diameter, the external diameter of linkage section, outer linkage section is little.
10. the indoor and outdoor machine tube connector of Split heat pump as claimed in claim 3 and refrigeration plant, it is characterized in that: the external diameter of described interlude is less than the external diameter of described interior linkage section, outer linkage section, the internal diameter of described interlude is larger than the internal diameter of described interior linkage section, outer linkage section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420248899.4U CN204063356U (en) | 2014-05-14 | 2014-05-14 | The indoor and outdoor machine tube connector of Split heat pump and refrigeration plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420248899.4U CN204063356U (en) | 2014-05-14 | 2014-05-14 | The indoor and outdoor machine tube connector of Split heat pump and refrigeration plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204063356U true CN204063356U (en) | 2014-12-31 |
Family
ID=52204853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420248899.4U Expired - Lifetime CN204063356U (en) | 2014-05-14 | 2014-05-14 | The indoor and outdoor machine tube connector of Split heat pump and refrigeration plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204063356U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982953A (en) * | 2014-05-14 | 2014-08-13 | 李静 | Indoor and outdoor unit connection pipe for splitting type heat pump and refrigeration equipment |
| CN111102367A (en) * | 2018-10-27 | 2020-05-05 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
-
2014
- 2014-05-14 CN CN201420248899.4U patent/CN204063356U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982953A (en) * | 2014-05-14 | 2014-08-13 | 李静 | Indoor and outdoor unit connection pipe for splitting type heat pump and refrigeration equipment |
| CN111102367A (en) * | 2018-10-27 | 2020-05-05 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141231 |