CN1094566C - Multi-stage capacity control scroll compressor - Google Patents
Multi-stage capacity control scroll compressor Download PDFInfo
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- CN1094566C CN1094566C CN99800912A CN99800912A CN1094566C CN 1094566 C CN1094566 C CN 1094566C CN 99800912 A CN99800912 A CN 99800912A CN 99800912 A CN99800912 A CN 99800912A CN 1094566 C CN1094566 C CN 1094566C
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/10—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
- F04C28/16—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
An asymmetrical volute type scroll compressor, wherein a first bypass valve (27) for setting a discharge capacity to 60 % is installed in a first scroll (21) and a second bypass valve (40) for setting a compressor set load to 50 % is installed outside the volute of the first scroll (21) by communication between a suction side and a discharge side, the first and second bypass valves (27, 40) are closed so as to set a substantial load of the compressor to 100 %, the first bypass valve (27) is open and the second bypass valve (40) is closed so as to set the substantial load of the compressor to 60 %, the first and second bypass valves (27, 40) are opened so as to set the substantial load of the compressor to 30 %, namely a volume percent Vr in operation at the minimum capacity is set at 1 or more so as to perform a reliable operation under a partial load of 50 % or less, whereby the operation under a load of 50 % or less can be changed in multiple stages.
Description
Technical field
The present invention relates to a kind of multi-stage capacity control scroll compressor that can carry out operation at part load in the low capacity territory.
Background technique
In the past, be provided with by-pass hole in the spiral and the scroll compressor that can carry out operation at part load has the scroll compressor (spy opens flat 9-170573 communique) shown in Fig. 8 and Fig. 9 (X-X of Fig. 8 is to sectional view).The spiral terminal that this scroll compressor belongs to the 1st whirlpool dish 1 is compared the asymmetric spiral scroll compressor of the only long π of its angle of spread (rad) with the spiral terminal of the 2nd whirlpool dish 2.And, the 1st fluid operating chamber A that is formed by the outer surface of the internal surface of the 1st whirlpool dish 1 and the 2nd whirlpool dish 2 and the 2nd fluid operating chamber B that internal surface by the outer surface of the 1st whirlpool dish 1 and the 2nd whirlpool dish 2 forms alternately open and close with respect to a low pressure port 3, coil from the 2nd whirlpool 2 and the 1st whirlpool coil 1 the outermost point of contact E about one point J place of enclosing of inwardly unrolling and be provided with the public by-pass hole 4 that all is communicated with the 1st fluid operating chamber A and the 2nd fluid operating chamber B.
In addition, on above-mentioned the 1st whirlpool dish 1, be provided with the valve opening 5 that is communicated with public by-pass hole 4, be provided with the bypass path 6 that is communicated with low pressure port 3 in the side of this valve opening 5.In the valve opening 5 the cylindrical bypass valve 7 of band shoulder that opens and closes public by-pass hole 4 can be housed with being free to slide.In addition, card only has a helical spring 8 on the shoulder position of bypass valve 7, and the top tegmentum of bypass valve 79 is airtight and separate with bell discharge chamber 10 and form operation and press chamber 11.Press on the chamber 11 in operation, be connected with the operation pressure pipe road 15 that is communicated with low pressure line 13 or pressure duct 14 selectively by solenoid valve 12 through connecting tube 16.The 17th, prevent the capillary tube of pressure duct 14 and low pressure line 13 short circuits, the 18th, shell, the 19th, high-pressure mouth.
As mentioned above, above-mentioned public by-pass hole 4 is arranged on from the outermost point of contact E of the 2nd whirlpool dish the 2 and the 1st whirlpool dish 1 about one point J place of enclosing of inwardly unrolling.Therefore, under the situation that the operation pressure chamber of bypass valve 7 11 supply pressurized gas, bypass valve 7 are closed, output capacity will be full capacity (100%) closing solenoid valve 12.Under the situation that the operation pressure chamber of bypass valve 7 11 supply low-pressure gases, bypass valve 7 are opened, because public by-pass hole 4 is on the position that begins to compress, therefore, output capacity will be about 60% of full capacity opening solenoid valve 12.Thus, the output capacity of scroll compressor is switched between the two 100% and 60%.
In addition, on inwardly unrolling the position of about 3/4 circle and the position of enclosing of unrolling, two public by-pass holes are set, also can obtain 3 kinds of output capacities such as 100%, 70% and 60% at outermost point of contact E from dish the 2 and the 1st whirlpool, above-mentioned the 2nd whirlpool dish 1.
But there is following shortcoming in above-mentioned existing multi-stage capacity control scroll compressor.At first, when the operation at part load of carrying out below 50%, because volume ratio Vr is quite little, therefore, range of operation is restricted.
For example, when the natural scale of above-mentioned the 1st, the 2nd whirlpool dish 1,2 was Vr=2.3 than Vr, as compressor, even under sub load, volume ratio can not be less than " 1 ", and therefore, limit sub load rate is 1/2.3=0.44, promptly operates to the limit with 44%.Than Vr limit sub load rate is reduced and can carry out operation at part load 50% below though improve natural scale, in this case, the efficient reduction in the time of instead can causing full load is so can not take to improve the way of natural scale than Vr.Yet, be with in many formulas air conditioner at one of many indoor sets of Yi Yitai outdoor unit band and must carry out 20%～30% load operation, when above-mentioned existing multi-stage capacity control scroll compressor being applied to above-mentioned one when being with many formulas air conditioner, the high frequent start-stop will occur, can not be set in problems such as best air-conditioning condition.
In addition, as load control scroll compressor, except said structure, also have and control with the motor frequency conversion device.But this controlling method needs converter circuit and causes cost to increase considerably.Particularly the large-size variable-frequency device also exists the problem that produces higher harmonics.And exist the problem of frequency variator when operation insufficient lubrication, cause compressor reliability to reduce.
In addition, if a plurality of public by-pass holes are set as described above, will cause processability and assembling performance to reduce, or because the 1st, the 2nd whirlpool dish is provided with public by-pass hole in the center portion and the rigidity reduction to seek 50% below than the operation at part load of low capacity.And, because the gas load in the spiral of the 1st, the 2nd whirlpool dish reduces significantly, therefore, between the centrifugal load that coil in gas load and the 2nd movable whirlpool with disequilibrium, bad phenomenon such as pin bearing (not shown) insufficient lubrication perhaps take place, and phenomenons such as the 2nd whirlpool dish topples perhaps take place.
Disclosure of an invention
For this reason, the purpose of this invention is to provide and a kind ofly can carry out multistage switching, cheap and multi-stage capacity control scroll compressor that reliability is high for the operation at part load below 50%.
For achieving the above object, the feature of multi-stage capacity control scroll compressor of the present invention is, have be formed in the pressing chamber on the precalculated position, pressurized gas that fluid operating is indoor is to the 1st bypass path of suction port loopback, open and close the 1st switching mechanism of above-mentioned the 1st bypass path, make the two the 2nd bypass path that is communicated with of discharge side and suction chamber and open and close the 2nd switching mechanism of above-mentioned the 2nd bypass path, when opening, only the discharge side pressurized gas of prearranging quatity discharged back suction chamber.
According to said structure, by the 2nd switching mechanism the 2nd bypass path is carried out open and close, the load of compressor can be switched between the 100% and the 1st predetermined percentage.And the 1st bypass path is carried out open and close by the 1st switching mechanism, the output capacity of above-mentioned compressor can be switched between the 100% and the 2nd predetermined percentage.Therefore, the combination of the open and close by above-mentioned the 1st switching mechanism and the open and close of above-mentioned the 2nd switching mechanism can be carried out 4 grades of switchings to the actual load of above-mentioned compressor.At this moment, for the output capacity of above-mentioned compressor, only switch to above-mentioned the 2nd predetermined percentage by the 1st switching mechanism.Therefore, if the natural scale ratio and above-mentioned the 2nd predetermined percentage of above-mentioned compressor are set for, volume ratio is more than or equal to 1, even then the actual load of above-mentioned compressor can carry out the high multi-class workload control of reliability for also keeping volume ratio under the situation of minimum more than or equal to 1 when the output capacity of above-mentioned compressor reaches above-mentioned the 2nd predetermined percentage.
In addition, the feature of a form of implementation of multi-stage capacity control scroll compressor of the present invention is, the 1st whirlpool dish that forms above-mentioned pressing chamber is asymmetric helical with the 2nd whirlpool dish, and promptly the spiral terminal of a whirlpool dish is compared only long 180 degree of its angle of spread with the spiral terminal of another whirlpool dish.
According to said structure, the fluid operating chamber the 2nd that the fluid operating chamber the 1st that the outer surface that is coiled by the internal surface and the 2nd whirlpool of the 1st whirlpool dish forms and the outer surface of the 1st whirlpool dish and the 2nd whirlpool dish internal surface form alternately is formed on the position of same the 1st bypass path.Therefore, only make the indoor pressurized gas of each fluid operating return suction port by one the 1st bypass path.
In addition, the feature of a form of implementation of multi-stage capacity control scroll compressor of the present invention is that above-mentioned the 2nd bypass channel setting is outside compressor body.
According to said structure, above-mentioned the 2nd bypass path and the 2nd switching mechanism are formed in the said compressor self-body, as long as be formed between discharge conduit and the suction line.Therefore, can make multi-stage capacity control scroll compressor with low cost.
In addition, the feature of a form of implementation of multi-stage capacity control scroll compressor of the present invention is to have a plurality of above-mentioned the 2nd bypass paths and the 2nd switching mechanism.
According to said structure, above-mentioned the 2nd bypass path and the 2nd switching mechanism are provided with a plurality of.Therefore, the combination of the open and close by each the 2nd switching mechanism and the open and close of above-mentioned the 1st switching mechanism can be carried out the multi-class workload control more than 8 grades.
In addition, the feature of a form of implementation of multi-stage capacity control scroll compressor of the present invention is that the 2nd switching mechanism that opens and closes above-mentioned the 2nd bypass path is the controlled mortor operated valve that is made as any aperture.
According to said structure,, therefore, the load of compressor can be switched to 100% and percentage arbitrarily because the aperture of above-mentioned the 2nd bypass path can set arbitrarily.Therefore, the combination that the open and close control by above-mentioned the 1st switching mechanism and the aperture of above-mentioned the 2nd switching mechanism are controlled can be with the actual load of compressor with multistage switching the arbitrarily.
In addition, the feature of a form of implementation of multi-stage capacity control scroll compressor of the present invention is that above-mentioned the 2nd switching mechanism is to move by the pressure difference between pilot pressure and above-mentioned suction chamber pressure or the discharge side pressure.
According to said structure, the control system of above-mentioned the 2nd switching mechanism can constitute simply, can low-costly make multi-stage capacity control scroll compressor.
In addition, the feature of a form of implementation of multi-stage capacity control scroll compressor of the present invention is to have the liquid discharging pipe that the low-pressure cavity that is communicated with above-mentioned suction port is cooled off.
According to said structure, from the cooling liquid cooling low-pressure cavity and the drive motor of liquid discharging pipe inspection.Prevent to cause above-mentioned low-pressure cavity temperature to raise with this, to reduce the temperature of discharging gas and motor owing to the pressurized gas in the above-mentioned pressing chamber return suction port.
In addition, the feature of a form of implementation of multi-stage capacity control scroll compressor of the present invention is, above-mentioned the 1st switching mechanism and the 2nd switching mechanism be by pilot pressure action, and the two link through being arranged at compressor body central upper portion position of the control mouth of above-mentioned the 1st switching mechanism and the control mouth of the 2nd switching mechanism is connected with separately pilot line.
According to said structure, the link that the control mouth of above-mentioned the 1st, the 2nd switching mechanism and separately pilot line are coupled together only is provided with one at the central upper portion position of compressor body and get final product, promptly pushes up one of center portion from shell and draws.Therefore, and need carry out comparing with the ellipse welding of operation pipe at Liang Chu when two eccentric positions on above-mentioned shell top are drawn, the weld job between above-mentioned shell top and the operation pipe carries out easily, can reduce assembling man-hour and further reduces cost.
In addition, the feature of a form of implementation of multi-stage capacity control scroll compressor of the present invention is, has the fixing standard scroll compressor of output capacity, and above-mentioned multi-stage capacity control scroll compressor and above-mentioned standard scroll compressor are connected in parallel.
According to said structure, constitute two-shipper formula multi-stage capacity control scroll compressor with multi-stage capacity control scroll compressor and standard scroll compressor.Therefore, by the unloading of above-mentioned standard scroll compressor and the combination of the n stage load switching of the switching of being fully loaded with two kinds of load conditions and multi-stage capacity control scroll compressor, can be with 2 * n level switchable load.Thus, can carry out more multistage load control.
In addition, the feature of a form of implementation of multi-stage capacity control scroll compressor of the present invention is, above-mentioned the 1st switching mechanism is by pilot pressure action, the control mouth of above-mentioned the 1st switching mechanism and be connected by screw thread between pilot line and this control mouthful link that couples together.
According to said structure, reliably be connected with tapered thread between the control mouth of above-mentioned the 1st switching mechanism and the link.Therefore, can realize having very high anti-leakage and stable on heating assembly structure with respect to the judder of link.
The simple declaration of accompanying drawing
Fig. 1 is the partial sectional view of multi-stage capacity control scroll compressor the 1st form of implementation of the present invention.
Fig. 2 is that the output capacity of multi-stage capacity control scroll compressor shown in Figure 1 is 30% o'clock a partial sectional view.
Fig. 3 is the partial sectional view of the multi-stage capacity control scroll compressor different with Fig. 1.
Fig. 4 is the sectional view of the 2nd form of implementation multi-stage capacity control scroll compressor.
Fig. 5 is the partial sectional view of the multi-stage capacity control scroll compressor different with Fig. 4.
Fig. 6 is the structural drawing of the multi-stage capacity control scroll compressor of the 3rd form of implementation.
To be expression be assemblied in the different assembly structure of assembly structure that covers with the connecting tube of Fig. 1, Fig. 3～shown in Figure 5 for Fig. 7 A, 7B.
Fig. 8 is the partial sectional view of existing load control scroll compressor.
Fig. 9 is that the X-X of Fig. 8 is to sectional view.
The best mode that carries out an invention
Below, the present invention is described in detail for the form of implementation shown in conjunction with the accompanying drawings.Fig. 1 is the partial sectional view of the multi-stage capacity control scroll compressor of the 1st form of implementation.The 1st whirlpool dish 21, the 2nd whirlpool dish 22, low pressure port 23, public by-pass hole 24, valve opening 25, bypass path 26, bypass valve 27, helical spring 28, lid 29, bell discharge chamber 30, chamber 31 is pressed in operation, solenoid valve 32, low pressure line 33, pressure duct 34, operation pressure pipe road 35, connecting tube 36, capillary tube 37, shell 38 and high-pressure mouth 39 have with Fig. 8 and existing asymmetric spiral multi-stage capacity control scroll compressor shown in Figure 9 in the 1st whirlpool dish 1, the 2nd whirlpool dish 2, low pressure port 3, public by-pass hole 4, valve opening 5, bypass path 6, bypass valve 7, helical spring 8, lid 9, bell discharge chamber 10, chamber 11 is pressed in operation, solenoid valve 12, low pressure line 13, pressure duct 14, operation pressure pipe road 15, connecting tube 16, capillary tube 17, the structure that shell 18 and high-pressure mouth 19 are identical also plays same effect.
In this form of implementation, be provided with outside the spiral on above-mentioned the 1st whirlpool dish 21 selectively with suction chamber that is communicated with low pressure port 23 and bell discharge chamber 30 in the 2nd bypass valve 40 of discharge side connection.Below, claiming that bypass valve 27 is the 1st bypass valve, bypass valve 40 is the 2nd bypass valve.The 2nd bypass valve 40 coils cylindric cylinder portion 42, front end on high pressure one side surface of 21 cover plate 41 and has spheroid and the valve body 43 that can slide and compress the spring 44 that is installed between this valve body 43 and the cylinder portion 42 cylinder portion 42 in and constitute by being arranged on the 1st whirlpool highlightedly substantially.
On low pressure one side end of above-mentioned cylinder portion 42, be provided with and have with the axis hole of the internal communication of cylinder portion 42 and on outer circumferential face, be provided with the assembly department 42a of assembling screw thread.In addition, have the through hole 45 that runs through this cover plate 41 on the cover plate 41, the upper end portion of this through hole 45 is provided with the mounting hole 45a that the assembly department 42a of air feed cylinder portion 42 screws.Like this, screw in the mounting hole 45a of cover plate 41 by assembly department 42a cylinder portion 42, cylinder portion 42 is fixed on highlightedly on high pressure one side surface of cover plate 41, above-mentioned suction chamber is connected with the inside via through holes 45 of cylinder portion 42 and the axis hole of assembly department 42a.In addition, the top of cylinder portion 42 and bell discharge chamber 30 isolate and formation operation pressure chamber 46.Press on the chamber 46 in operation, be connected with the operation pressure pipe road 48 that is communicated with low pressure line 33 or pressure duct 34 selectively by the 2nd solenoid valve 47 through connecting tube 49.Below, claiming that solenoid valve 32 is the 1st solenoid valve, solenoid valve 47 is the 2nd solenoid valve.The 50th, prevent the capillary tube of short circuit between pressure duct 34 and the low pressure line 33.
The outer circumferential face of above-mentioned valve body 43 is provided with the shoulder that low voltage side is a minor diameter, and spring 44 is installed on this minor diameter.Cylinder portion 42 axially on the intermediate portion be provided with diametrically the inboard through hole 51 that is communicated with the outside, when valve body 43 slided into foot, the large-diameter portion of valve body 43 can be closed the through hole 51 of cylinder portion 42.Here, the size of through hole 51 is set at the load that can make compressor and is for example 50%.
Therefore, when above-mentioned the 2nd solenoid valve 47 cuts out and presses chamber 46 to supply with pressurized gas to the operation of the 2nd bypass valve 40, when valve body 43 is slided downwards, the above-mentioned large-diameter portion of valve body 43 is closed through hole 51 and the load setting of compressor is 100% (below, the load of setting like this is called assumed load).And when the 2nd solenoid valve 47 being opened to press chamber 46 to supply with low-pressure gas to the operation of the 2nd bypass valve 40, when valve body 43 was slided upward, the through hole 51 of valve body 43 was opened, and the assumed load of compressor becomes 50%.That is, in this form of implementation, above-mentioned the 2nd bypass path is made of through hole 45, and above-mentioned the 2nd switching mechanism is made of the 2nd bypass valve 40.
As above the multi-stage capacity control scroll compressor of Gou Chenging can be realized following multi-class workload control by the switching of controlling the 1st bypass valve 27 and the 2nd bypass valve 40.At first, as described above above-mentioned the 2nd solenoid valve 47 cuts out, make the 2nd bypass valve 40 close, the assumed load of compressor becomes 100%.Under this state, when the 1st solenoid valve 32 close, when the operation of the 1st bypass valve 27 presses chamber 31 to supply with pressurized gas, the 1st bypass valve 27 will cut out, output capacity becomes 100%.Therefore, the actual load of compressor in this case is 100% (=100% * 100%) (state of Fig. 1).And when the 1st solenoid valve 32 open, when the operation of the 1st bypass valve 27 presses chamber 31 to supply with low-pressure gases, the 1st bypass valve 27 is opened, output capacity becomes 60%.Therefore, the actual load of compressor becomes 60% (=100% * 60%) in this case.Secondly, open by the 2nd solenoid valve 47, the 2nd bypass valve 40 is opened, and the assumed load of compressor becomes 50%.Under this state, when the 1st above-mentioned solenoid valve 32 is opened and opened the 1st bypass valve 27, output capacity will become 60%.Therefore, the actual load of compressor becomes 30% (=50% * 60%) (state of Fig. 2) in this case.
In this case, on above-mentioned the 1st whirlpool dish 21,, offer a unique public by-pass hole 24 that runs through and the 1st bypass valve 27 is set only at the about one point J place of enclosing (with reference to Fig. 9) of inwardly unrolling of the outermost point of contact E from dish the 22 and the 1st whirlpool, the 2nd whirlpool dish 21.Output capacity when therefore, minimum capacity moves is 60%.Thereby, be that the value of the volume ratio Vr during the minimum capacity operation is that 1.38 (=2.3 * 0.6) are not less than " 1 " under 2.3 the situation at the natural scale of the 1st, the 2nd whirlpool dish 21,22 than Vr.That is,, can realize the operation at part load below 50% that reliability is high according to this form of implementation.
As mentioned above, in this form of implementation, on the 1st whirlpool of above-mentioned asymmetric spiral scroll compressor dish 21, be provided with from the 2nd whirlpool dish 22 and the outermost point of contact E of the 1st whirlpool dish 21 about one point J place of enclosing (with reference to Fig. 9) of inwardly unrolling that to be communicated with low pressure port 23 and to make output capacity be 60% the 1st bypass valve 27.And, outside the spiral of the 1st whirlpool dish 21, be provided with and be communicated with selectively so that the assumed load of compressor is 50% the 2nd bypass valve 40 with above-mentioned suction chamber and discharge side.By the switching of the 1st solenoid valve 32 and the 2nd solenoid valve 47, utilize pressure official post the 1st bypass valve 27 and the 2nd bypass valve 40 between the pressure of the pressure of low pressure line 33 and pressure duct 34 and above-mentioned suction chamber to open and close.Therefore, if the 2nd bypass valve 40 and the 1st bypass valve 27 are closed, the actual load that can make compressor is 100%.If the 2nd bypass valve 40 cuts out, the 1st bypass valve 27 is opened, the actual load that can make compressor is 60%.If the 2nd bypass valve 40 and the 1st bypass valve 27 are opened, the actual load that can make compressor is 30%.
That is, according to this form of implementation, the value of the volume ratio Vr in the time of can making the minimum capacity operation is not less than " 1 ", thereby can carry out the high operation at part load below 50% of reliability.
At this moment, as multi-stage capacity control scroll compressor with said structure, as long as offer the through hole 45 that runs through cover plate 41 outside the spiral of the dish of the 1st whirlpool in having the existing asymmetric spiral multi-stage capacity control scroll compressor of above-mentioned the 1st bypass valve 27 21, the assembly department 42a that screws cylinder portion 42 on these through hole 45 upper end portions can constitute simply.And, be arranged on the 2nd vortex valve 40 outside the spiral and needn't have and resemble the accuracy that is arranged on the 1st vortex valve 27 in the spiral.Therefore, can obtain at low cost with less number of spare parts.
Fig. 3 is the partial sectional view of a variation of multi-stage capacity control scroll compressor shown in Figure 1.The 1st whirlpool dish 61 in the multi-stage capacity control scroll compressor shown in Figure 3, the 2nd whirlpool dish 62, the 1st bypass valve 63, the 1st solenoid valve 64, low pressure line 65, pressure duct 66, operation pressure pipe road 67, high-pressure mouth 68, the 2nd bypass valve 69, through hole 70, the 2nd solenoid valve 71 and operation pressure pipe road 72 have with multi-stage capacity control scroll compressor shown in Figure 1 in the 1st whirlpool dish 21, the 2nd whirlpool dish 22, the 1st bypass valve 27, the 1st solenoid valve 32, low pressure line 33, pressure duct 34, operation pressure pipe road 35, high-pressure mouth 39, the 2nd bypass valve 40, through hole 45, the structure that the 2nd solenoid valve 47 and operation pressure pipe road 48 are identical also plays same effect.
In this form of implementation, aforesaid operations pressure pipe road 67,72 is connected with the 2nd bypass valve 69 with the 1st bypass valve 63 by a connecting tube 74 that is installed in shell 73 end face central authorities.Connecting tube 74 is provided with two hole 74a, 74b differing from each other; The 1st hole 74a upward is connected with operation pressure pipe road 67, the 2 hole 74b through the 1st tubular bolt joint 75 and upward is connected with operation pressure pipe road 72 through the 2nd tubular bolt joint 76.And the 1st hole 74a presses chamber 78 to be connected by the 1st pipe arrangement 77 with the operation of the 1st bypass valve 63, and the 2nd hole 74b presses chamber 80 to be connected by the 2nd pipe arrangement 79 with the operation of the 2nd bypass valve 69.
Like this, be that a connecting tube 74 is drawn from the top cover central authorities of shell 73 by being put together in above-mentioned two operation pressure pipe roads 67,72, can reduce and assemble man-hour, further reduce cost.
Fig. 4 is the partial sectional view of the multi-stage capacity control scroll compressor of the 2nd form of implementation.The 1st whirlpool dish the 81, the 2nd whirlpool dish 82, low pressure port 83, bypass valve the 84, the 1st solenoid valve 85, low pressure line 86, pressure duct 87, operation pressure pipe road 88, connecting tube 89 and high-pressure mouth 90 have with multi-stage capacity control scroll compressor shown in Figure 1 in dish the 21, the 2nd whirlpool, the 1st whirlpool dish 22, low pressure port the 23, the 1st bypass valve the 27, the 1st solenoid valve 32, low pressure line 33, pressure duct 34, operation pressure pipe road 35, connecting tube 36 and the identical structure of high-pressure mouth 39 and play a part same.
In the multi-stage capacity control scroll compressor shown in Figure 1, the top of the through hole 45 that is run through on the cover plate 41 of the 1st whirlpool dish 21 is provided with the 2nd bypass valve 40, switching by the 2nd bypass valve 40, be communicated with above-mentioned suction chamber and discharge side selectively, thereby the assumed load of compressor is switched between 100% and 50%.Yet, describedly can realize with other method with being communicated with also of above-mentioned suction chamber and discharge side selectively.
Among Fig. 4, the two is connected with the bypass path 93 that the centre is provided with the 2nd solenoid valve 91 and capillary tube 92 with above-mentioned low pressure line 86 and pressure duct 87, thereby can realize being communicated with above-mentioned suction chamber and discharge side selectively.In addition, above-mentioned capillary tube 92 can prevent short circuit between pressure duct 87 and the low pressure line 86.Below, make that with the formation of the 2nd solenoid valve 91 assumed load that can make compressor when it is opened is that 50% occasion is an example, the working principle of the multi-stage capacity control scroll compressor of this form of implementation is described.
This multi-stage capacity control scroll compressor is to be achieved as follows multi-class workload control by the switching of the 1st solenoid valve 85 and the 2nd solenoid valve 91 is controlled.At first, the 2nd solenoid valve 91 cutting out and makes the assumed load of compressor is 100%.Under this state, when the 1st solenoid valve 85 cut out, the 1st bypass valve 84 cut out, and made that output capacity is 100%.Therefore, the actual load of compressor is 100% at this moment.When the 1st solenoid valve 85 was opened, the 1st bypass valve 84 was opened, and output capacity is 60%.Secondly, by being opened, the 2nd solenoid valve 91 makes that the assumed load of compressor is 50%.Under this state, when the 1st solenoid valve 85 is opened, output capacity will be 60%.Therefore, the actual load of compressor will be 30% at this moment.Like this, same with the 1st form of implementation, the value of the volume ratio Vr in the time of can making the minimum capacity operation is not less than " 1 ", can carry out the high operation at part load below 50% of reliability.
In above-mentioned form of implementation, be connected a kind of so very simple method by the bypass path 93 that above-mentioned low pressure line 86 and pressure duct 87 is provided with solenoid valve 91 through the centre, can realize being communicated with selectively with above-mentioned suction chamber and discharge side.Therefore, can the 2nd bypass valve 40 needn't be set in compressor body, can further reduce cost as the 1st form of implementation.
In addition, also can use to replace above-mentioned the 2nd solenoid valve 91 with the mortor operated valve of control apertures such as stepper motor, to realize the multistage change arbitrarily of compressor assumed load.Therefore, in this case, by with the combination of opening, closing of the 1st solenoid valve 85, can carry out the high any multistage load control below 50% of reliability.
Fig. 5 is the partial sectional view of a variation of multi-stage capacity control scroll compressor shown in Figure 4.The 1st whirlpool dish 101 in the multi-stage capacity control scroll compressor shown in Figure 5, the 2nd whirlpool dish 102, low pressure port 103, bypass valve 104, the 1st solenoid valve 105, low pressure line 106, pressure duct 107, operation pressure pipe road 108, connecting tube 109 and high-pressure mouth 110 have with multi-stage capacity control scroll compressor shown in Figure 1 in the 1st whirlpool dish 21, the 2nd whirlpool dish 22, low pressure 23, the 1st bypass valve 27, the 1st solenoid valve 32, low pressure line 33, pressure duct 34, operation pressure pipe road 35, the structure that connecting tube 36 and high-pressure mouth 39 are identical also plays a part same.But bypass valve 104 is arranged on and makes output capacity is on 50% the position.
Among Fig. 5, the two is provided with bypass path 113 that the assumed load that makes compressor when opening is 75% the 2nd solenoid valve 111 and the middle assumed load that makes compressor when opening that is provided with is that the bypass path 114 of 65% the 3rd solenoid valve 112 is connected through the centre with above-mentioned low pressure line 106 and pressure duct 107.Like this, by controlling the switching of the 1st solenoid valve the 105, the 2nd solenoid valve 111 and the 3rd solenoid valve 112, can carry out following multi-class workload control.
At first, be 100% by the 2nd solenoid valve 111 and the 3rd solenoid valve 112 are closed the assumed load that makes compressor.Under this state, when the 1st solenoid valve 105 cut out, the 1st bypass valve 104 cuts out and makes output capacity was 100%.Therefore, the actual load of compressor is 100% at this moment.When the 1st solenoid valve 105 was opened, the 1st bypass valve 104 is opened and made output capacity was 50%.Therefore, the actual load of compressor is 50% at this moment.Secondly, the 2nd solenoid valve 111 is opened when the 3rd solenoid valve 112 cuts out, made that the assumed load of compressor is 75%.Under this state, when the 1st solenoid valve 105 cuts out, output capacity will be 100%.Therefore, the actual load of compressor is 75% at this moment.Secondly, by the 2nd solenoid valve 111 and the 3rd solenoid valve 112 are opened, make that the assumed load of compressor is 49% (=75% * 65%).Under this state, when the 1st solenoid valve 105 is opened, output capacity will be 50%.Therefore, the actual load of compressor is 24% (=75% * 65% * 50%) at this moment.Like this, the value of the volume ratio Vr in the time of can making the minimum capacity operation is not less than " 1 ", thereby can carry out the high multi-class workload control below 50% of reliability.In the above description, be controlled to be example with 4 stage loads and be illustrated, but also can carry out maximum 8 grades load control.
Fig. 6 is the structural drawing of the multi-stage capacity control scroll compressor of the 3rd form of implementation.In this form of implementation, the scroll compressor of multi-stage capacity control scroll compressor by will having any structure in above-mentioned each form of implementation (below be called the volume controlled machine) and normal structure (non-volume controlled) (below be called the standard machine) combination, the high progression multi-class workload that can carry out 50% below is controlled.
Above-mentioned standard machine 121 is that maximum output capacity is 1/2 a non-capacity controlled scroll compressor of the pressurized gas needed maximum capacity of system (being designated hereinafter simply as the maximum demand capacity) of supplying with object.Above-mentioned volume controlled machine 122 for example is a multi-stage capacity control scroll compressor shown in Figure 5, and its maximum output capacity is 1/2 of a said system maximum demand capacity.For volume controlled machine 122, switching by the 1st solenoid valve 123 is controlled the switching of bypass valve (with reference to Fig. 5), realize the switching of output capacity between 100% and 50%, switching by the 2nd solenoid valve 124, realize the switching of compressor assumed load between 100% and 75%, by the switching of the 3rd solenoid valve 125, realize the switching of compressor assumed load between 100% and 65%.Outside the dish of for example the 1st whirlpool in volume controlled machine 122 the liquid discharging pipe 126 with nozzle is set, is connected with liquid line 127 from system.
As above the multi-stage capacity control scroll compressor of Gou Chenging is following carries out work.At first, make standard machine 121 be in unloaded state.Under this state, the above-mentioned actual load that makes volume controlled machine 122 is 24% as described above.Like this, standard machine 121 is 0% (=50% * 0%) of maximum demand capacity to the capacity of system's output, volume controlled machine 122 is 12% (50% * 24%) of maximum demand capacity to the capacity of system's output, therefore, the actual output capacity to system's output is 12% (=standard machine 0%+ volume controlled machine 12%) of maximum demand capacity.Below, similarly, when the actual load that makes volume controlled machine 122 was 50%, the capacity of exporting to system was 25% (=50% * 50%) of maximum demand capacity, therefore, the actual output capacity of exporting to system is 25% of a maximum demand capacity.And when making the actual load of volume controlled machine 122 be 75%, will be 37.5% of maximum demand capacity to the actual output capacity of system's output.When the actual load of volume controlled machine 122 is 100%, the actual output capacity of exporting to system will be 50% of maximum demand capacity.
Secondly, make above-mentioned standard machine 121 be in fully loaded (100%) state.Under this state, the above-mentioned actual load that makes volume controlled machine 122 is 24% as described above.Like this, standard machine 121 is 50% (50% * 100%) of maximum demand capacity to the capacity of system's output, volume controlled machine 122 is 12% (50% * 24%) of maximum demand capacity to the capacity of system's output, therefore, the actual output capacity to system's output is 62% (=standard machine 50%+ volume controlled machine 12%) of maximum demand capacity.Below, similarly, when the actual load that makes volume controlled machine 122 was 50%, the actual output capacity of exporting to system was 75% of a maximum demand capacity.And when making the actual load of volume controlled machine 122 be 75%, will be 87.5% of maximum demand capacity to the actual output capacity of system's output.When the actual load of volume controlled machine 122 is 100%, the actual output capacity of exporting to system will be 100% of maximum demand capacity.
In this case, in the above-mentioned volume controlled machine 122, the indoor high temperature and high pressure gas of above-mentioned bell discharge returns above-mentioned suction chamber, therefore, becomes high temperature by above-mentioned the 1st whirlpool dish and the 2nd whirlpool dish press part that constitutes and the temperature that drives the motor that coils in above-mentioned the 2nd whirlpool.For this reason, in this form of implementation, in volume controlled machine 122, be provided with liquid discharging pipe 126, from system's one side atomizing of liquids refrigerant.Therefore, the liquid refrigerant of injection, cools off above-mentioned press part and motor under motor one effluent of driving the 2nd whirlpool disc spins from the press part that is made of the 1st whirlpool dish and the 2nd whirlpool dish.Like this, can reduce the temperature of discharging gas and motor, but enlarge range of operation.This liquid discharging pipe that is installed on the volume controlled machine also can use at the multi-stage capacity control scroll compressor of the 1st, the 2nd form of implementation and not have any obstruction.
As mentioned above, in this form of implementation, be that 1/2 standard machine 121 of the required maximum capacity of system and maximum output capacity are that 1/2 volume controlled machine 122 of the required maximum capacity of system has constituted two-shipper formula multi-stage capacity control scroll compressor by maximum output capacity.Therefore, when standard machine 121 is switched between unloaded state and full load condition, the actual load of volume controlled machine 122 is switched between 24%, 50%, 75% and 100%, can make two-shipper formula multi-stage capacity control scroll compressor to the actual output capacity of system output system's maximum demand capacity 12%, 25%, 37.5%, 50%, 62%, 75%, 87.5% and 100% between carry out 8 grades of switchings.And if the actual load of volume controlled machine 122 can carry out 8 grades of switchings at most, then two-shipper formula multi-stage capacity control scroll compressor can carry out 16 grades of switchings to the actual output capacity of system's output.In the above description,, the maximum output capacity of standard machine 121 and volume controlled machine 122 is made as 1/2 of system's maximum demand capacity, but not limited by this, as long as actual output capacity is as required suitably set for ease of explanation.
The connecting tube 36 that is connected on the chamber 31 is pressed in the operation of the 1st bypass valve 27 in above-mentioned each form of implementation (below, be representative with the 1st form of implementation), is its front end to be inserted to be opened in the hole of covering on 29 install, and seals with 0 shape seal ring 52.But, the ability that this mounting structure bears connecting tube 36 vibration a little less than, under certain service condition, can leak.And also has the heat resistance problem.For this reason, in the 4th form of implementation, adopted the mounting structure shown in Fig. 7 A, the 7B.
Among Fig. 7 A, the tapered portion of connecting tube 131 front ends is provided with external screw thread 132, is provided with female thread 134 in the cone shape hole of lid 133.Like this, connecting tube 131 front end tapered portion are combined on cover in 133 the cone shape hole, cover on 133 thereby connecting tube 131 is installed in.The sealing of this tapered thread provides can bear connecting tube 131 judders and have very high anti-leaks and stable on heating mounting structure.And among Fig. 7 B, the two is separated from one another for connecting tube body 135 and body 136, makes body 136 integrally formed with lid 137.Afterwards, make the front end of body 136 pass the hole 139 of shell 138 and highlight, and 139 places weld fixing in the hole.Again, the cone shape hole of connecting tube body 135 and the tapered portion of body 136 front ends are screwed.As mentioned above, body 136 constitutes with lid 137 one, and combines with connecting tube body 135 with tapered thread, thereby can obtain to bear body 136 judders and have very high anti-leaks and stable on heating mounting structure.
In addition, in above-mentioned each form of implementation, as shown in Figure 9, the spiral terminal of the 1st whirlpool dish 21,61,81,101 is compared the only long π of its angle of spread (red) with the spiral terminal of the 2nd whirlpool dish 22,62,82,102, and coils 21,61,81,101 outermost point of contact E with dish the 22,62,82,102 and the 1st whirlpool, the 2nd whirlpool and be illustrated as the example of the asymmetric spiral scroll compressor of a kind of like this what is called of above-mentioned spiral terminal.But the present invention is not limited to this, also suitable for only stagger the each other so-called symmetrical spiral scroll compressor of angle of spread π (red) of the spiral terminal of a pair of whirlpool dish of symmetry.But, as the spiral scroll compressor of this symmetry, be not formed at same position by the internal surface of the 1st whirlpool dish and formed the 1st fluid operating chamber A of outer surface of the 2nd whirlpool dish with the 2nd fluid operating chamber B that the internal surface that is coiled by the outer surface and the 2nd whirlpool of the 1st whirlpool dish forms, but form toward each other, therefore, the 1st bypass valve that is used for changing the compressor output capacity need on position toward each other, be provided with the 1st fluid operating chamber A with and the 2nd fluid operating chamber B with two bypass valve.
Claims (10)
1. multi-stage capacity control scroll compressor is characterized in that having:
Be formed in the pressing chamber on the precalculated position, pressurized gas that fluid operating is indoor is to the 1st bypass path (26) of suction port (23) loopback,
Open and close the 1st switching mechanism (27) of above-mentioned the 1st bypass path (26),
Make the 2nd bypass path (45) of discharge side and the two connection of suction chamber,
Open and close the 2nd switching mechanism (40) of above-mentioned the 2nd bypass path (45), when opening, only the discharge side pressurized gas of prearranging quatity are discharged back suction chamber.
2. multi-stage capacity control scroll compressor as claimed in claim 1, it is characterized in that, the 1st whirlpool dish (21) and the 2nd whirlpool dish (22) that form above-mentioned pressing chamber are asymmetric helical, and promptly the spiral terminal of a whirlpool dish is compared only long 180 degree of its angle of spread with the spiral terminal of another whirlpool dish.
3. multi-stage capacity control scroll compressor as claimed in claim 1 is characterized in that, above-mentioned the 2nd bypass path (93) is arranged on outside the compressor body.
4. as claim 1 or 3 described multi-stage capacity control scroll compressors, it is characterized in that having a plurality of above-mentioned the 2nd bypass paths (113,114) and the 2nd switching mechanism (111,112).
5. multi-stage capacity control scroll compressor as claimed in claim 3 is characterized in that, the 2nd switching mechanism that opens and closes above-mentioned the 2nd bypass path (93) is the controlled mortor operated valve that is made as any aperture.
6. multi-stage capacity control scroll compressor as claimed in claim 1 is characterized in that, above-mentioned the 2nd switching mechanism (40) is to move by the pressure difference between the pressure of the pressure of pilot pressure and above-mentioned suction chamber or discharge side.
7. multi-stage capacity control scroll compressor as claimed in claim 1 is characterized in that, has the liquid discharging pipe (126) that the low-pressure cavity that is communicated with above-mentioned suction port (23) is cooled off.
8. multi-stage capacity control scroll compressor as claimed in claim 1 is characterized in that, above-mentioned the 1st switching mechanism (63) and the 2nd switching mechanism (69) are to move by pilot pressure,
The control mouth of above-mentioned the 1st switching mechanism (63) and the two link (74) through being arranged at compressor body central upper portion position of control mouth of the 2nd switching mechanism (69) are connected with separately pilot line (67,72).
9. a multi-stage capacity control scroll compressor is characterized in that, has the described multi-stage capacity control scroll compressor of claim 1 (122) and the fixing standard scroll compressor (121) of output capacity,
Above-mentioned multi-stage capacity control scroll compressor (122) is connected in parallel with above-mentioned standard scroll compressor (121).
10. multi-stage capacity control scroll compressor as claimed in claim 1 is characterized in that,
Above-mentioned the 1st switching mechanism is by pilot pressure action, the control mouth of above-mentioned the 1st switching mechanism and be connected by screw thread between pilot line and this control mouthful link (131,135) that couples together.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP165022/98 | 1998-06-12 | ||
| JP165022/1998 | 1998-06-12 | ||
| JP10165022A JP2974009B1 (en) | 1998-06-12 | 1998-06-12 | Multi-stage capacity control scroll compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1272906A CN1272906A (en) | 2000-11-08 |
| CN1094566C true CN1094566C (en) | 2002-11-20 |
Family
ID=15804366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99800912A Expired - Fee Related CN1094566C (en) | 1998-06-12 | 1999-05-26 | Multi-stage capacity control scroll compressor |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1004773B1 (en) |
| JP (1) | JP2974009B1 (en) |
| KR (1) | KR100601270B1 (en) |
| CN (1) | CN1094566C (en) |
| DE (1) | DE69943017D1 (en) |
| ES (1) | ES2356224T3 (en) |
| WO (1) | WO1999064744A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7335004B2 (en) | 2004-12-23 | 2008-02-26 | Lg Electronics Inc. | Apparatus for varying capacity in scroll compressor |
| CN102159906A (en) * | 2008-09-30 | 2011-08-17 | 大金工业株式会社 | Refrigerating apparatus |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6478550B2 (en) | 1998-06-12 | 2002-11-12 | Daikin Industries, Ltd. | Multi-stage capacity-controlled scroll compressor |
| CN100343527C (en) * | 2002-12-25 | 2007-10-17 | 乐金电子(天津)电器有限公司 | Vortex compressor with anti-vacuum function |
| KR100547322B1 (en) | 2003-07-26 | 2006-01-26 | 엘지전자 주식회사 | Scroll compressor with volume regulating capability |
| KR100557056B1 (en) | 2003-07-26 | 2006-03-03 | 엘지전자 주식회사 | Scroll compressor with volume regulating capability |
| KR100585811B1 (en) | 2004-12-31 | 2006-06-07 | 엘지전자 주식회사 | Modulation type scroll compressor |
| US20090035167A1 (en) | 2007-08-03 | 2009-02-05 | Zili Sun | Stepped scroll compressor with staged capacity modulation |
| US8328531B2 (en) | 2009-01-22 | 2012-12-11 | Danfoss Scroll Technologies, Llc | Scroll compressor with three-step capacity control |
| JP5489142B2 (en) * | 2011-02-22 | 2014-05-14 | 株式会社日立製作所 | Scroll compressor |
| CN106286292B (en) * | 2015-05-27 | 2018-12-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Compression assembly, varying capacity screw compressor and air conditioner |
| CN105275804B (en) | 2015-10-15 | 2017-10-10 | 珠海格力节能环保制冷技术研究中心有限公司 | The displacement-variable device and screw compressor of screw compressor |
| KR101747175B1 (en) | 2016-02-24 | 2017-06-14 | 엘지전자 주식회사 | Scroll compressor |
| KR101800261B1 (en) * | 2016-05-25 | 2017-11-22 | 엘지전자 주식회사 | Scroll compressor |
| KR101839886B1 (en) | 2016-05-30 | 2018-03-19 | 엘지전자 주식회사 | Scroll compressor |
| US10563891B2 (en) * | 2017-01-26 | 2020-02-18 | Trane International Inc. | Variable displacement scroll compressor |
| JP6489166B2 (en) * | 2017-07-05 | 2019-03-27 | ダイキン工業株式会社 | Scroll compressor |
| CN211343341U (en) * | 2018-09-19 | 2020-08-25 | 艾默生环境优化技术(苏州)有限公司 | Scroll compressor having a plurality of scroll members |
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- 1999-05-26 ES ES99922489T patent/ES2356224T3/en not_active Expired - Lifetime
- 1999-05-26 DE DE69943017T patent/DE69943017D1/en not_active Expired - Lifetime
- 1999-05-26 EP EP99922489A patent/EP1004773B1/en not_active Expired - Lifetime
- 1999-05-26 KR KR1020007001426A patent/KR100601270B1/en not_active IP Right Cessation
- 1999-05-26 CN CN99800912A patent/CN1094566C/en not_active Expired - Fee Related
- 1999-05-26 WO PCT/JP1999/002761 patent/WO1999064744A1/en active IP Right Grant
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| JPH0979152A (en) * | 1995-09-11 | 1997-03-25 | Sanyo Electric Co Ltd | Scroll compressor |
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| US7335004B2 (en) | 2004-12-23 | 2008-02-26 | Lg Electronics Inc. | Apparatus for varying capacity in scroll compressor |
| CN100453813C (en) * | 2004-12-23 | 2009-01-21 | Lg电子株式会社 | Apparatus for varying capacity in scroll compressor |
| CN102159906A (en) * | 2008-09-30 | 2011-08-17 | 大金工业株式会社 | Refrigerating apparatus |
| CN102159906B (en) * | 2008-09-30 | 2013-03-27 | 大金工业株式会社 | Refrigerating apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1004773A1 (en) | 2000-05-31 |
| KR100601270B1 (en) | 2006-07-13 |
| EP1004773A4 (en) | 2004-05-12 |
| ES2356224T3 (en) | 2011-04-06 |
| KR20010022824A (en) | 2001-03-26 |
| JPH11351167A (en) | 1999-12-21 |
| EP1004773B1 (en) | 2010-12-08 |
| CN1272906A (en) | 2000-11-08 |
| DE69943017D1 (en) | 2011-01-20 |
| WO1999064744A1 (en) | 1999-12-16 |
| JP2974009B1 (en) | 1999-11-08 |
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