CN101328878A - Suction duct of air conditioner compressor and fabricating and connecting method thereof - Google Patents
Suction duct of air conditioner compressor and fabricating and connecting method thereof Download PDFInfo
- Publication number
- CN101328878A CN101328878A CNA2008100295182A CN200810029518A CN101328878A CN 101328878 A CN101328878 A CN 101328878A CN A2008100295182 A CNA2008100295182 A CN A2008100295182A CN 200810029518 A CN200810029518 A CN 200810029518A CN 101328878 A CN101328878 A CN 101328878A
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- bend pipe
- pipe
- compressor
- iron hoop
- storage container
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Abstract
The invention provides a suction pipe for an air conditioner compressor and methods for manufacturing and connecting the same. The suction pipe is an all-steel bent pipe, a horizontal section is provided with an iron ring, an end port of a pipe column of the iron ring is pressed into the horizontal section of the bent pipe by a pressure machine based on requirements, a copper-based solder is placed at an annular seam which is arranged between the bent pipe and the iron ring and between a vertical section of the bent pipe and a main body of a liquid reservoir, which is welded in a furnace by means of braze welding so as to realize synchronous welding between the bent pipe and the iron ring and between the bent pipe and the liquid reservoir. The horizontal section of the bent pipe and a suction hole of an air cylinder of the compressor are connected directly, the sealing way has sealing of conical surface or sealing of interference fit of a cylindrical surface or filling sealing of high plastic metal deformation, and the iron ring on the bent pipe is welded by resistance welding on the shell of the compressor. The suction pipe omits a technical part of a conduit and performs all-steel pipe of the suction pipe, thereby greatly reducing use amount of the copper pipe material. In addition, twice welding are turned into once welding and applications on the prior high silver solder and the solder containing silver, phosphorus and copper are omitted, thereby reducing greatly cost of the air conditioner and improving product quality.
Description
Technical field
The present invention is a kind of renovation technique of air condition compressor, the improvement of particularly a kind of air condition compressor sucking pipe and its making and connecting means.
Background technique
At present being connected generally between air condition compressor liquid-storage container and the compressor body realizes by two transition elements: conduit that is welded to each other and connecting tube.Conduit is welded on the compressor housing, realizes being connected of compressor body and liquid-storage container by connecting tube again.Conduit generally adopts copper pipe, and it is by the main casing welding of high silver solder gas brazing or high-frequency induction brazing and compressor; Connecting tube is copper pipe or copper facing pipe, with the Placement of liquid-storage container body be the manual gas brazing of argentiferous phos copper.Because the price of silver is constantly soaring in recent years, cause the price continuous rise of braze, add also continuous rise of copper pipe price, compressor manufacturer and downstream air conditioning system maker all face huge cost pressure.And original Placement need adopt multiple welding, and failure welding rate and leakage reject ratio are also high always.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, provides a kind of cancellation to contain silver solder, reduces the copper material use amount, comprehensively reduces the air condition compressor sucking pipe of air condition compressor cost of production and raising complete machine quality.
Another object of the present invention provides a kind of manufacture method of air condition compressor sucking pipe.
Further purpose of the present invention provides the connecting means of a kind of air condition compressor sucking pipe and compressor body and liquid-storage container.
Realize that technological scheme of the present invention is: a kind of air condition compressor sucking pipe, be connected between compressor and the liquid-storage container, it is characterized in that: described sucking pipe comprises one-time formed integrated type all steel bend pipe, and described bend pipe has vertical section of being connected with liquid-storage container and the horizontal segment that is connected with the compressor air suction mouth; Be arranged with iron hoop on the horizontal segment of bend pipe, iron hoop one end is a tubing string, and the other end is a horn mouth, and the tubing string internal diameter of iron hoop matches with bend pipe horizontal segment external diameter.
Described iron hoop is suitable with the size that this bend pipe inserts in the compressor air suction mouth apart from the distance of bend pipe horizontal segment end face.
The present invention also provides a kind of making method of air condition compressor sucking pipe, it is characterized in that may further comprise the steps:
1) all steel bend pipe that is made into one;
2) with iron hoop as requested the degree of depth be fitted on the horizontal segment of bend pipe, iiared port is towards the bend pipe direction, and scolder is placed on ring-type seam crossing between iron hoop and the steel pipe;
3) bend pipe that iron hoop will be housed welds together by furnace brazing.
The present invention also provides the connecting means of a kind of air condition compressor sucking pipe and liquid-storage container, it is characterized in that may further comprise the steps:
1) all steel bend pipe that is made into one;
2) vertical end and the liquid-storage container body with bend pipe is installed together by anchor clamps;
3) with iron hoop as requested the degree of depth be pressed into the horizontal segment of liquid-storage container bend pipe, the iron hoop iiared port is towards the liquid-storage container body.
4) the copper parent metal is placed on the welding part of liquid-storage container body and bend pipe and the ring-type seam crossing between bend pipe and the iron hoop;
5) above-mentioned liquid-storage container is put into soldering oven, scolder melts and permeates the gap of filling up each ring-type seam crossing in soldering oven, and iron hoop and bend pipe, bend pipe and this body disposable of liquid-storage container is integrally welded.
The present invention further provides the connecting means of a kind of air condition compressor sucking pipe and compressor, it is characterized in that the iron hoop of all steel bend pipe is welded on the housing of compressor by the resistance welding mode, it comprises the steps:
1) the bend pipe horizontal ends is inserted in the cylinder of compressor inlet hole;
2) exert pressure on the lateral edges in bell-mouthed inner conical surface of iron hoop and compressor housing mounting hole, the iron hoop horn mouth is closely contacted with compressor housing, simultaneously, bend pipe horizontal ends and cylinder inlet hole form and are tightly connected;
3) in bell-mouthed male cone (strobilus masculinus) of iron hoop and the set mounting hole of compressor housing, pass to big electric current between the lateral edges;
4) after the outage, molten metal solidifies rapidly under the effect of pressure and welds together.
Its step 2) in, the sealing means of bend pipe and cylinder inlet hole has three kinds of methods: 1) the bend pipe outer surface conical surface and cylinder inlet hole internal surface cone match are pressed into the back and realize sealing; 2) bend pipe outer surface cylndrical surface cooperates with cylinder inlet hole internal surface cylindrical interference, is pressed into the back and realizes sealing; 3) metal ring of high-plasticity is arranged between bend pipe outer surface and the cylinder inlet hole internal surface, the metal ring distortion was filled after bend pipe was pressed into the cylinder inlet hole, realized sealing.
Air condition compressor sucking pipe provided by the present invention and Placement thereof, because the bend pipe that adopts all steel to make on the liquid-storage container, and with bend pipe replacement copper conductor tube and copper or copper facing connecting tube, the horizontal segment of bend pipe directly is connected with the housing of compressor, cancel the use of copper conductor tube, thereby greatly reduced the use amount of copper material; And the present invention is owing to need not to weld conduit and connecting tube as connecting transition, only need adopt the mode of resistance welding to be connected with compressor housing the sucking pipe of an one, high silver brazing between conduit and the compressor housing and the argentiferous phosphor-copper soldering between liquid-storage container and conduit, conduit and the connecting tube have been cancelled, saved expensive braze twice, comprehensively reduce the cost of air-conditioning, strengthened product competitive ability.In addition, the present invention not only makes failure welding rate and leak-down rate significantly reduce owing to replaced gas brazing technology twice with resistance-welding process, has also reduced the pollution to environment, has improved production line employee's operating environment.
Description of drawings
Fig. 1 is the liquid-storage container structural representation that sealing means is filled in cylindrical interference fitted seal and high-plasticity flow of metal;
Fig. 2 is the liquid-storage container structural representation of conical surface seal mode;
Fig. 3 is a sucking pipe Placement structural representation of the present invention;
Fig. 4 is sucking pipe and cylinder inlet hole conical surface seal mode schematic representation;
Fig. 5 is sucking pipe and cylinder inlet hole periphery interference fit seal mode schematic representation;
Fig. 6 is that the sealing means schematic representation is filled in sucking pipe and the flow of metal of cylinder inlet hole high-plasticity.
Embodiment
As shown in Figure 1 and Figure 2, be the air condition compressor liquid-storage container, it comprises liquid-storage container body 1 and other internal structures, be connected with the sucking pipe of forming by the iron hoop 3 of the steel bend pipe 2 of one and straw hat shape on the body 1, the horizontal segment that iron hoop 3 is sleeved on bend pipe (is an overhanging end, when adopting Fig. 2 mode, overhanging straight horizontal pipeline section and the taper pipeline section of suit bend pipe 2 simultaneously in the iron hoop 3), iron hoop 3 and bend pipe 2 are solidly installed by welding.
In the present embodiment, bend pipe 2 bends for waiting external diameter steel pipe one, and the connecting tube lengthening of the more conventional liquid-storage container of overhanging end is to replace conventional conduit and connecting tube.Iron hoop 3 one ends are tubing string, and the other end is a horn mouth, and the internal diameter of iron hoop 3 tubing strings matches with bend pipe 2 horizontal segment external diameters, during Fig. 2 mode, match with taper pipeline section external diameter simultaneously.
In the present embodiment, sucking pipe can be used in following method with being connected of liquid-storage container:
At first, by the be made into one bend pipe 2 of steel of special tooling; Then with press machine with iron hoop 3 as requested the degree of depth be fitted on the bend pipe 2, the iiared port of iron hoop 3 is towards bend pipe 2 directions, and scolder is placed on ring-type seam crossing between iron hoop and the steel pipe; The bend pipe 2 that iron hoop 3 will be housed then is installed on the liquid-storage container body 1, and several weld seams of liquid-storage container body 1 also are placed with scolder simultaneously; To put into soldering oven by the liquid-storage container of above-mentioned steps installation at last, scolder melts and permeates the gap of filling up each ring-type seam crossing in soldering oven, to realize between liquid-storage container body, body and bend pipe, bend pipe and the iron hoop and the welding of other weld joints.
The connecting means of sucking pipe and compressor is as follows, bend pipe 2 overhanging horizontal segment ends are directly inserted in the cylinder of compressor inlet hole 4, iron hoop 3 on the bend pipe 2 is pressed on the mounting hole seamed edge of compressor housing 5, connect with resistance welding, by conical surface seal or the cylindrical interference fitted seal or the high-plasticity flow of metal filling sealing of bend pipe 2 horizontal segments.Shown in Fig. 4,5,6, at first the horizontal ends of bend pipe 2 is directly inserted cylinder inlet hole 4; In the inner conical surface of iron hoop 3 horn throats and compressor housing 5 set mounting holes, exert pressure on the lateral edges then, both are closely contacted, and form and be tightly connected.Bend pipe 2 has three kinds of methods with the sealing means of cylinder inlet hole 4: as Fig. 4, the bend pipe 2 outer surface conical surfaces and cylinder inlet hole 4 internal surface cone match are pressed into the back and realize sealing.As Fig. 5, bend pipe 2 outer surface cylndrical surface cooperate with cylinder inlet hole 4 internal surface cylindrical interference, are pressed into the back and realize sealing.As Fig. 6, be provided with the metal ring 6 of high-plasticity between bend pipe 2 outer surfaces and cylinder inlet hole 4 internal surfaces, bend pipe 2 is pressed into 6 distortion of cylinder inlet hole 4 back metal rings and fills, and realizes sealing.Lower half portion is represented the state before bend pipe 2 and cylinder inlet hole 4 compress among Fig. 6, and upper half part is represented the state after bend pipe 2 and cylinder inlet hole 4 compress.After compressing, in iron hoop 3 bell-mouthed male cone (strobilus masculinus)s and compressor housing 5 set mounting holes, pass to big electric current between the lateral edges, melt metal between two weldments by resistance heat.Outage back molten metal solidifies rapidly under the effect of pressure and realizes welding, makes firm, reliable, the leak free connection of realization between sucking pipe and the compressor housing 5.The connecting means of sucking pipe and compressor housing among the present invention, the topmost iron hoop 3 of sucking pipe that is characterised in that is welded on the housing 5 of compressor by the resistance welding mode.
Claims (8)
1, a kind of air condition compressor sucking pipe, be connected between compressor and the liquid-storage container, it is characterized in that: described sucking pipe comprises one-time formed integrated type all steel bend pipe, and described bend pipe has vertical section of being connected with liquid-storage container and the horizontal segment that is connected with the compressor air suction mouth; Be arranged with iron hoop on the horizontal segment of bend pipe, iron hoop one end is a tubing string, and the other end is a horn mouth, and the tubing string internal diameter of iron hoop matches with bend pipe horizontal segment external diameter.
2, air condition compressor sucking pipe according to claim 1 is characterized in that: described iron hoop is suitable with the size that this bend pipe inserts in the compressor air suction mouth apart from the distance of bend pipe horizontal segment end face.
3, a kind of making method that is used for the described air condition compressor sucking pipe of claim 1 is characterized in that may further comprise the steps:
1) all steel bend pipe that is made into one;
2) with iron hoop as requested the degree of depth be fitted on the horizontal segment of bend pipe, iiared port is towards the bend pipe direction, and scolder is placed on ring-type seam crossing between iron hoop and the steel pipe;
3) bend pipe that iron hoop will be housed welds together through furnace brazing.
4, a kind of connecting means that is used for described air condition compressor sucking pipe of claim 1 and liquid-storage container is characterized in that may further comprise the steps:
1) all steel bend pipe that is made into one;
2) vertical end and the liquid-storage container body with bend pipe is installed together by anchor clamps;
3) with iron hoop as requested the degree of depth be pressed into the horizontal segment of liquid-storage container bend pipe, the iron hoop iiared port is towards the liquid-storage container body.
4) the copper parent metal is placed on the welding part of liquid-storage container body and bend pipe and the ring-type seam crossing between bend pipe and the iron hoop;
5) above-mentioned liquid-storage container is put into soldering oven, scolder melts and permeates the gap of filling up each ring-type seam crossing in soldering oven, and iron hoop and bend pipe, bend pipe and this body disposable of liquid-storage container is integrally welded.
5, a kind of connecting means that is used for described air condition compressor sucking pipe of claim 1 and compressor is characterized in that the iron hoop of bend pipe is welded on the housing of compressor by the resistance welding mode, and it comprises the steps:
1) the bend pipe horizontal ends is inserted in the cylinder of compressor inlet hole;
2) exert pressure on the lateral edges in bell-mouthed inner conical surface of iron hoop and compressor housing mounting hole, the iron hoop horn mouth is closely contacted with compressor housing, simultaneously, bend pipe horizontal ends and cylinder inlet hole form and are tightly connected;
3) in bell-mouthed male cone (strobilus masculinus) of iron hoop and the set mounting hole of compressor housing, pass to big electric current between the lateral edges;
4) after the outage, molten metal solidifies under the effect of pressure and welds together.
6, according to the connecting means of described air condition compressor sucking pipe of claim 5 and compressor, it is characterized in that: step 2) in, the bend pipe outer surface conical surface and cylinder inlet hole internal surface cone match realize sealing.
7, according to the connecting means of described air condition compressor sucking pipe of claim 5 and compressor, it is characterized in that: step 2) in, bend pipe outer surface cylndrical surface cooperates with cylinder inlet hole internal surface cylindrical interference, realizes sealing.
8, according to the connecting means of described air condition compressor sucking pipe of claim 5 and compressor, it is characterized in that: step 2) in, be provided with the metal ring of high-plasticity between bend pipe outer surface and the cylinder inlet hole internal surface, the metal ring distortion was filled after bend pipe was pressed into the cylinder inlet hole, realized sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100295182A CN101328878A (en) | 2008-07-16 | 2008-07-16 | Suction duct of air conditioner compressor and fabricating and connecting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100295182A CN101328878A (en) | 2008-07-16 | 2008-07-16 | Suction duct of air conditioner compressor and fabricating and connecting method thereof |
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| CN101328878A true CN101328878A (en) | 2008-12-24 |
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|---|---|---|---|
| CNA2008100295182A Pending CN101328878A (en) | 2008-07-16 | 2008-07-16 | Suction duct of air conditioner compressor and fabricating and connecting method thereof |
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Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059491A (en) * | 2010-12-09 | 2011-05-18 | 中山市奥美森工业有限公司 | Pressure ring structure of ring sleeving machine |
| CN102059493A (en) * | 2010-12-09 | 2011-05-18 | 中山市奥美森工业有限公司 | Collar sleeving machine |
| CN102642065A (en) * | 2012-05-16 | 2012-08-22 | 力创(台山)电子科技有限公司 | Process for welding two devices for manufacturing copper-aluminum composite tube and welding ring |
| CN102873508A (en) * | 2011-11-01 | 2013-01-16 | 浙江三花制冷集团有限公司 | Method for manufacturing gas collecting tube assembly and air-conditioning system |
| CN103143809A (en) * | 2013-03-21 | 2013-06-12 | 光驰科技(上海)有限公司 | Method for simultaneously welding multiple welding-seams and auxiliary welding tool |
| CN103452855A (en) * | 2013-09-03 | 2013-12-18 | 广东美芝精密制造有限公司 | Rotary compressor |
| CN103542644A (en) * | 2013-10-25 | 2014-01-29 | 嵊州市新高轮制冷设备有限公司 | Connection structure of cooling system of refrigerating plant |
| CN103753006A (en) * | 2013-12-26 | 2014-04-30 | 广州亨龙机电股份有限公司 | Resistance welding process of fluid reservoir of compressor |
| CN104747408A (en) * | 2013-12-25 | 2015-07-01 | 珠海凌达压缩机有限公司 | Compressor |
| CN104999172A (en) * | 2015-07-22 | 2015-10-28 | 斯培淦 | Pipe fitting and shell welding method and application |
| CN105020947A (en) * | 2015-07-07 | 2015-11-04 | 嵊州市新高轮制冷设备有限公司 | Manufacturing method of liquid storage device |
| CN105014299A (en) * | 2015-07-07 | 2015-11-04 | 嵊州市新高轮制冷设备有限公司 | Connecting method of liquid storage device |
| CN105042957A (en) * | 2015-07-07 | 2015-11-11 | 嵊州市新高轮制冷设备有限公司 | Liquid storage device |
| CN105298849A (en) * | 2015-11-03 | 2016-02-03 | 安徽美芝精密制造有限公司 | Compressor |
| CN105478979A (en) * | 2014-09-17 | 2016-04-13 | 大典五金制品（惠州）有限公司 | Resistance welding production process of upper end cover of compressor liquid storage tank |
| CN105583481A (en) * | 2016-02-03 | 2016-05-18 | 中国电子科技集团公司第十六研究所 | Vacuum exhaust pipe sealing method for sealing Dewar device thoroughly |
| CN106181418A (en) * | 2016-08-28 | 2016-12-07 | 嵊州市新高轮制冷设备有限公司 | The automatic assembly line of a kind of compressor of air conditioner liquid reservoir and the production method of production line |
| CN106438292A (en) * | 2016-07-08 | 2017-02-22 | 珠海凌达压缩机有限公司 | Compressor and air conditioner employing same |
| CN106825815A (en) * | 2017-01-23 | 2017-06-13 | 广东顺德三合工业自动化设备股份有限公司 | A kind of welding technique of compressor and reservoir |
| CN107571027A (en) * | 2017-10-17 | 2018-01-12 | 广东正业科技股份有限公司 | A kind of housing and its processing method and process equipment |
| CN109931720A (en) * | 2017-12-15 | 2019-06-25 | 三菱电机(广州)压缩机有限公司 | A kind of heat pump system |
| CN111219312A (en) * | 2018-11-26 | 2020-06-02 | 上海海立电器有限公司 | Micro compressor |
| CN114321543A (en) * | 2021-12-31 | 2022-04-12 | 广东美的环境科技有限公司 | Pipe assembly and temperature control equipment |
-
2008
- 2008-07-16 CN CNA2008100295182A patent/CN101328878A/en active Pending
Cited By (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059493B (en) * | 2010-12-09 | 2013-08-07 | 中山市奥美森工业有限公司 | Collar sleeving machine |
| CN102059493A (en) * | 2010-12-09 | 2011-05-18 | 中山市奥美森工业有限公司 | Collar sleeving machine |
| CN102059491B (en) * | 2010-12-09 | 2013-10-30 | 中山市奥美森工业有限公司 | Pressure ring structure of ring sleeving machine |
| CN102059491A (en) * | 2010-12-09 | 2011-05-18 | 中山市奥美森工业有限公司 | Pressure ring structure of ring sleeving machine |
| CN102873508A (en) * | 2011-11-01 | 2013-01-16 | 浙江三花制冷集团有限公司 | Method for manufacturing gas collecting tube assembly and air-conditioning system |
| CN102642065A (en) * | 2012-05-16 | 2012-08-22 | 力创(台山)电子科技有限公司 | Process for welding two devices for manufacturing copper-aluminum composite tube and welding ring |
| CN103143809A (en) * | 2013-03-21 | 2013-06-12 | 光驰科技(上海)有限公司 | Method for simultaneously welding multiple welding-seams and auxiliary welding tool |
| CN103143809B (en) * | 2013-03-21 | 2016-03-09 | 光驰科技(上海)有限公司 | A kind of method and welding aid simultaneously welding many weld seams |
| CN103452855A (en) * | 2013-09-03 | 2013-12-18 | 广东美芝精密制造有限公司 | Rotary compressor |
| CN103542644A (en) * | 2013-10-25 | 2014-01-29 | 嵊州市新高轮制冷设备有限公司 | Connection structure of cooling system of refrigerating plant |
| CN104747408A (en) * | 2013-12-25 | 2015-07-01 | 珠海凌达压缩机有限公司 | Compressor |
| CN103753006A (en) * | 2013-12-26 | 2014-04-30 | 广州亨龙机电股份有限公司 | Resistance welding process of fluid reservoir of compressor |
| CN105478979A (en) * | 2014-09-17 | 2016-04-13 | 大典五金制品（惠州）有限公司 | Resistance welding production process of upper end cover of compressor liquid storage tank |
| CN105042957A (en) * | 2015-07-07 | 2015-11-11 | 嵊州市新高轮制冷设备有限公司 | Liquid storage device |
| CN105014299B (en) * | 2015-07-07 | 2016-05-25 | 嵊州市新高轮制冷设备有限公司 | A kind of method of attachment of sump assemblies |
| CN105014299A (en) * | 2015-07-07 | 2015-11-04 | 嵊州市新高轮制冷设备有限公司 | Connecting method of liquid storage device |
| CN105020947A (en) * | 2015-07-07 | 2015-11-04 | 嵊州市新高轮制冷设备有限公司 | Manufacturing method of liquid storage device |
| CN105042957B (en) * | 2015-07-07 | 2016-04-13 | 嵊州市新高轮制冷设备有限公司 | A kind of sump assemblies |
| CN104999172A (en) * | 2015-07-22 | 2015-10-28 | 斯培淦 | Pipe fitting and shell welding method and application |
| CN105298849A (en) * | 2015-11-03 | 2016-02-03 | 安徽美芝精密制造有限公司 | Compressor |
| CN105583481A (en) * | 2016-02-03 | 2016-05-18 | 中国电子科技集团公司第十六研究所 | Vacuum exhaust pipe sealing method for sealing Dewar device thoroughly |
| CN106438292A (en) * | 2016-07-08 | 2017-02-22 | 珠海凌达压缩机有限公司 | Compressor and air conditioner employing same |
| CN106181418A (en) * | 2016-08-28 | 2016-12-07 | 嵊州市新高轮制冷设备有限公司 | The automatic assembly line of a kind of compressor of air conditioner liquid reservoir and the production method of production line |
| CN106825815A (en) * | 2017-01-23 | 2017-06-13 | 广东顺德三合工业自动化设备股份有限公司 | A kind of welding technique of compressor and reservoir |
| CN107571027A (en) * | 2017-10-17 | 2018-01-12 | 广东正业科技股份有限公司 | A kind of housing and its processing method and process equipment |
| CN109931720A (en) * | 2017-12-15 | 2019-06-25 | 三菱电机(广州)压缩机有限公司 | A kind of heat pump system |
| CN109931720B (en) * | 2017-12-15 | 2024-02-09 | 三菱电机(广州)压缩机有限公司 | Heat pump system |
| CN111219312A (en) * | 2018-11-26 | 2020-06-02 | 上海海立电器有限公司 | Micro compressor |
| CN114321543A (en) * | 2021-12-31 | 2022-04-12 | 广东美的环境科技有限公司 | Pipe assembly and temperature control equipment |
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Open date: 20081224 |