CN1782417A - Overheat preventing device for turine compressor - Google Patents
Overheat preventing device for turine compressor Download PDFInfo
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- CN1782417A CN1782417A CN 200410096529 CN200410096529A CN1782417A CN 1782417 A CN1782417 A CN 1782417A CN 200410096529 CN200410096529 CN 200410096529 CN 200410096529 A CN200410096529 A CN 200410096529A CN 1782417 A CN1782417 A CN 1782417A
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Abstract
The overheat preventing device for turbine compressor includes a high pressure part set inside the exhaust chamber of the closed container; a low pressure part outside the exhaust chamber of the closed container; a by-pass valve oil path set on one side of the fixed turbine for exhausting the high pressure gas from the high pressure part to the low pressure part; a pressure valve for closing the oil path of the by-pass valve; and a temperature sensing valve to start the pressure valve through sensing the temperature in the high pressure part. The present invention exhausts high pressure gas from the high pressure part to the low pressure part in terms of the temperature in the high pressure part so as to start the motor preventer on the motor to stop the compressor. The present invention can avoid the expansion valve jamming, insufficient start refrigerant, etc. during compression.
Description
Technical field
The present invention relates to a kind of overheated device that prevents, particularly relate to a kind of overcome in the turbocompressor running prevent overheated device (APPARATUS PREVENTING OVER HEATING FOR SCROLLCOMPRESSOR) owing to the limit of expanding is stopped up or the reasons such as deficiency of starting refrigeration agent cause overheated turbocompressor.
Background technique
As shown in Figure 4, general refrigeration cycle is made up of compressor 100, coagulator 110, vaporizer 120 and expanding petal (perhaps capillary tube) 130.Freezer when operation, the refrigeration agent of the High Temperature High Pressure of compressor 100 compressions, be discharged into coagulator 110 after, heat discharge is made its liquefaction to the outside; During by expanding petal 130, then be converted to the refrigeration agent of low-temp low-pressure, gasification in vaporizer 120; Behind the heat around absorbing, be drawn into compressor 100 repeatedly.
When above-mentioned runnability forms the right path, the temperature maintenance of the high-voltage section of compressor is below to a certain degree, and when making compressor, this temperature is as important design variables, and very big effect is guided in aspects such as the performance of compressor, efficient, credibility.Simultaneously, when the design compressor, the temperature of above-mentioned high-voltage section setting permissible range to a certain degree, compressor can free-running operation in the scope of its setting so.But unfortunately, actual air-conditioning function of use is many and use each compositing factor of air-conditioning can not give full play to and keep separately time spent of doing, and can shorten the life-span of compressor or cause the function of compressor.
In the prior art, for the temperature of the high-voltage section (hyperbaric chamber) that prevents compressor rises, setting is the discharge tube of the outside exhaust of seal container of compressor in the past, and the sensor of temperature sensor perhaps partly is installed at the high-voltage section seal container that forms compressor.When exceeding specific range of temperatures; by other circuit breaker power of compressor; thereby the refrigeration system on the technical foundation in the past; need the additional configuration circuit; simultaneously the temperature rising detection method of high-voltage section neither be direct, postpones and cause problem such as stroke defect so exist the action that makes protective gear.
This shows that above-mentioned existing turbocompressor obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem that turbocompressor exists, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that above-mentioned existing turbocompressor exists, the inventor is based on being engaged in this type of product specification manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, the overheated device that prevents in the hope of the turbocompressor of founding a kind of new structure, can improve the overheated device that prevents of general existing turbocompressor, make it have more practicability.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
Main purpose of the present invention is, overcome the defective that existing turbocompressor exists, and provide a kind of new structure turbocompressor prevent overheated device, technical problem to be solved is to make it when turbine compression operation, can prevent the problems of excessive heat of the discharge gas that the blocking phenomenon of expanding petal or the not foot phenomenon of starting refrigerant etc. cause, thereby be suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.A kind of turbocompressor that proposes according to the present invention prevent overheated device, it comprises: the high-voltage section of the discharge chamber that the inside upper part of seal container is provided with; The low voltage section that be arranged on the outside of discharging chamber identical with high-voltage section; One side of fixed turbine is provided with the bypass valve oil circuit that the high pressure air of high-voltage section portion is discharged into low voltage section; And the pressure valve that is provided with in order to close above-mentioned bypass valve oil circuit; And be provided with by the sense temperature of high-voltage section being finished the temperature sense valve that the starting pressure valve is a purpose; Temperature with above-mentioned high-voltage section is a foundation, and the high pressure air of high-voltage section is discharged into low voltage section, and starting is arranged on motor protection device on the motor to stop the operation of compressor.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid turbocompressor prevent overheated device, wherein said valve protecting cover inside, a part that connects the bypass valve oil circuit with pressure valve be provided with open and close the bypass valve oil circuit piston; In order to keep the elastic force of piston, be inserted with valve spring, and be installed with stopper at its end.
Aforesaid turbocompressor prevent overheated device, wherein said bypass valve oil circuit is located in the fixed turbine.
Aforesaid turbocompressor prevent overheated device, wherein said temperature detection valve is located in the above-mentioned lower frame, the inner end of above-mentioned valve protecting cover and high-voltage section are provided with the pressurization stream; The upper end portion of pressurization stream is provided with insertion groove; The upper end portion of insertion groove is installed with the insulation board that prevents bimetal opening and closing plate noise.
Aforesaid turbocompressor prevent overheated device, wherein said piston can be closed the bypass valve oil circuit between high-voltage section and the low voltage section under normal situation; During compressor generation abnormal operation, by the circulation groove of piston outside, the connection bypass valve oil circuit in above-mentioned hyperbaric chamber and low pressure chamber is discharged into low pressure chamber to the pressurized gas in the hyperbaric chamber.
Aforesaid turbocompressor prevent overheated device, wherein said piston is a drum shape, in the pressure fixing of one end by the pressurization stream of temperature detection valve, the other end is then supported by valve spring.
Aforesaid turbocompressor prevent overheated device, the outside of wherein said piston is provided with circulation groove ring-type, that connect high-voltage section and low voltage section stream that connects the outside.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technological scheme as can be known; in order to reach aforementioned goal of the invention; turbocompressor among the present invention prevents overheated device; under multiple disadvantageous condition; when particularly expanding lobe obstruction or starting lack of refrigerant phenomenon; when rising for the temperature of protecting high pressure air to the destruction of compressor; it is made up of following components: the pressure valve (stopper valve) that induction is discharged chamber interior sense temperature valve (valve that bimetallic material is done) and started according to the temperature sense valve, and the bypass valve oil circuit that is communicated with high-voltage section and low voltage section and opens and closes according to above-mentioned piston valve.
In this apparatus of the present invention, in forming regular compressor manipulation process,, make the pressure in the pressurization oil circuit keep low pressure because of the said temperature Inductance valve stops up the pressurization oil circuit.This moment pressure valve the spring side because of having kept the relation of low pressure, thereby formed the state of equilibrium of pressure.Simultaneously, pressure valve then is not support the expansive force of piston spring and be pressed against the pressurized stream trackside, makes above-mentioned bypass valve oil circuit form turnoff state.
The overheated device that prevents of the turbocompressor among the present invention specifically is made up of following components: be located at the motor in airtight container and the seal container, and be located at helical turbine and fixed turbine with spiral salient corresponding with it that an interior section of seal container has spiral and convex shape.Said motor descends volume with said fixing, two turbines of spiral, with this high-voltage section that sucks the low pressure gas in the seal container and tell the specific position that is positioned at seal container because of starting during helical turbine continuously.At opening portion on one side then is to communicate with above-mentioned high-voltage section, and another side then is the bypass valve oil circuit that communicates with low voltage section, is provided with the structure that the pressurized gas in the high-voltage section is discharged into low voltage section.The with good grounds pressure-operated valve in the centre of this bypass valve oil circuit; and this valve then is the pressure of induction high-voltage section; the manipulation of the temperature sense valve of in the temperature of setting in advance, handling and the high pressure air that flows into; open above-mentioned bypass valve oil circuit according to it; and the pressurized gas of high-voltage section is discharged into low voltage section; can start the motor protection device of on said motor, installing thus, thereby stop the operation of compressor.
Above-mentioned pressure valve is made up of valve protecting cover, piston, valve spring, stopper, and above-mentioned valve protecting cover runs through the part of bypass valve oil circuit, and the pressurization stream (induction stream) of pressurization stream (induction stream) perforation that connects with the temperature sense valve is arranged in a side simultaneously.And above-mentioned valve spring then is to be supported by the stopper of valve protecting cover opposite side.
Under the normal situation of above-mentioned piston, can close the bypass valve oil circuit that connects high-voltage section and low voltage section, and compressor is when operating improperly, the stream that forms by above-mentioned piston, in above-mentioned discharge chamber and low voltage section, connect the bypass valve oil circuit that runs through two positions, impel the pressurized gas in the high-voltage section to be discharged into low voltage section.
Above-mentioned piston-shaped like cylindrical shape, the pressure effect according to playing the pressurization stream in tangent plane therein is supported according to spring at opposite tangent plane simultaneously.
The processed groove that the ring-type that connects utility pole is arranged in the outside of above-mentioned piston, thus the stream that connects high-voltage section and low voltage section formed.
Above-mentioned valve protecting cover forms in fixed turbine.
Said temperature detects valve and comprises the bimetal release panel that is made with bimetallic material.When compressor during, can close above-mentioned pressurization stream in normal operation.The temperature of high-voltage section exceeds setting value when above, opens the pressurization stream, works at the opposite direction of piston valve spring, opens thus because of the pent bypass valve oil circuit of piston, and the pressurized gas in the high-voltage section is discharged into low voltage section.
Via as can be known above-mentioned, the invention relates to a kind of overheated device that prevents of turbocompressor, it comprises: the high-voltage section H of the discharge chamber 21 that the inside upper part of seal container 1 is provided with; The low voltage section L that be arranged on the outside of discharging chamber 21 identical with high-voltage section H; One side of fixed turbine 8 is provided with the bypass valve oil circuit that the high pressure air of high-voltage section H portion is discharged into low voltage section L; And the pressure valve 300 that is provided with in order to close above-mentioned bypass valve oil circuit; And be provided with by the sense temperature of high-voltage section (H) is finished starting pressure valve 300 and be the temperature sense valve 200 of purpose; Its temperature with above-mentioned high-voltage section H is a foundation, and the high pressure air of high-voltage section H is discharged into low voltage section L, and starting is arranged on motor protection device on the motor to stop the operation of compressor.The present invention can avoid the phenomenons such as deficiency because of the blocking phenomenon of the expanding petal that causes in the compression running or starting refrigeration agent; and can make pressure portion when overheated; according to the ascending temperature that temperature sense valve and pressure valve are directly responded to, starting guard equipment prevents the generation of malfunction rapidly.
By technique scheme, the overheated device that prevents of turbocompressor of the present invention has following advantage at least:
The preventing that low voltage section that overheated device has comprised the high-voltage section of the discharge chamber that possesses on the interior routine top of the seal container of turbocompressor and discharged the outdoor from communicating of the turbocompressor that relates among the present invention and be provided with the pressure valve that opens and closes the bypass valve oil circuit in the bypass valve oil circuit that forms.And the temperature of induction high-voltage section, when exceeding in advance the temperature that is provided with, be included as the breakout pressure valve and the temperature sense valve established.According to the temperature of high-voltage section, the high pressure air of high-voltage section is discharged into low voltage section then.Its advantage is: turbocompressor in compressor operating, because of expanding petal stops up or the deficiency of operation refrigeration agent during now as the high-voltage section superheating phenomenon that causes, can directly respond to and rapidly starting guard equipment prevent that malfunction from taking place.
In sum, the turbocompressor of special construction of the present invention prevent overheated device, when turbine compression operation, prevented the problems of excessive heat of the discharge gas that the blocking phenomenon of expanding petal or the not foot phenomenon of starting refrigerant etc. cause.It has above-mentioned many advantages and use value, and in like product, do not see have similar structural design to publish or use and really genus innovation, no matter it structurally or bigger improvement all arranged on the function, have large improvement technically, and produced handy and practical effect, and more existing turbocompressor has the multinomial effect of enhancement, thus be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.
The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
The longitudinal section figure of the turbocompressor that adopts in when Fig. 1 is this
Fig. 2 and Fig. 3 are the formation that prevents overheated device in the turbocompressor among the present invention and the sectional drawing of effect
Fig. 4 is the part figure that shows common refrigeration cycle
1: seal container 3: lower frame
21: discharge chamber 100: the bypass valve oil circuit
200: temperature sense valve 201: the pressurization oil circuit
202: insertion groove 210: the bimetallic material petcock
220: dividing plate 300: pressure valve
301: valve protecting cover 310: piston
311: circulation groove 320: valve spring
330: stopper H: high-voltage section
L: low voltage section
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, the turbocompressor that foundation the present invention is proposed prevent its embodiment of overheated device, structure, feature and effect thereof, describe in detail as after.
See also shown in Figure 1ly, it is according to the overheated anti-longitudinal section figure that goes up the turbocompressor that device adopts according to the present invention; See also Fig. 2 and shown in Figure 3, it is the formation that prevents overheated device and the effect sectional drawing of relevant turbocompressor among the present invention.As shown in the figure, the overheated device that prevents of the turbocompressor among the present invention comprises following components: it adopts turbocompressor is major component, inner airtight seal container 1, on write the stator 4 that is provided with between lower frame 3, above-mentioned upper frame 2 and the lower frame 3 of inner lower combination of upper frame 2, above-mentioned seal container 1 of the upper inside combination of seal container 1, and the motor that possesses rotor 5.
There is the crankshaft 7 that together rotates with rotor 5 at the center of above-mentioned rotor 5, in the above-mentioned upper frame 2 fixed turbine 8 is arranged, the bottom of said fixing turbine 8 and rotatable helical turbine 9 are meshed, the central part of above-mentioned rotary turbine 9 bottoms then is after breaking away from the center of crankshaft 7, crankshaft 7 and upper end eccentric part 7a slide bushing to be reset combination.
The top of the fixed turbine 8 of above-mentioned seal container 1 is positioned at silencing apparatus 20 inboard places, has the residual discharge chamber 21 of high pressure air, and a side of upper frame 92 has refrigeration suction pipe 11, is provided with the discharge tube 12 of discharging compression refrigeration gas in a side of discharging chamber 20.Simultaneously, side is provided with throttle down 13 within it, also has the machine oil 22 that the sliding parts of having filled supply turbocompressor inside is arranged in the bottom of above-mentioned seal container 1.
At first to stator 4 power supplies of motor 6, the rotor 5 of said stator 4 inside rotates according to the interaction face with stator 4 such a turbocompressor simultaneously.
Thereupon with the crankshaft 7 of the intermediate portion of above-mentioned rotor 5 engagement in rotation, and according to the rotation of above-mentioned crankshaft 7, make the spiral vortex 9 of centrifugal the 7a in the upper end that is positioned at crankshaft 7 do centrifugal rotatablely moving at centrifugal distance range, being initial point with the axle center promptly, is that distance is carried out spiral motion with the turning radius.The spiral motion of also with good grounds above-mentioned helical turbine 9 forms pressing chamber between each liner (spiral type image portion) of its helical turbine 9 and fixed turbine 8, the pressing chamber of formation moves to the center by the spiral motion of persistency and reduced volume simultaneously.Thus, strengthened having compressed the refrigeration agent that the suction pipe 11 by seal container 1 sucks to the inside of seal container 1.
At this moment, compressed refrigerant is told by the discharge port that forms in the fixed turbine 8 again and is discharged chamber 21.Afterwards, tell the compression refrigeration gas of above-mentioned discharge chamber 21, be transported to the next device of cyclic process by the discharge tube 12 that in discharging chamber 21, is provided with.
As such compressor, turbocompressor among the present invention prevent overheated device, be made up of following components: the low voltage section L in the high-voltage section H of the discharge chamber 21 that the inside upper part of seal container 1 possesses and discharge 21 outsides, chamber communicates, for the high pressure air of high-voltage section H portion is discharged into low voltage section L, the bypass valve oil circuit that formation is arranged in a side of fixed turbine 8, and the pressure valve 300 that is provided with in order to close above-mentioned bypass valve oil circuit, be the temperature sense valve 200 of purpose by the sense temperature of high-voltage section H being finished starting pressure valve 300 in addition.
300 of above-mentioned pressure valve are made up of following components: the piston 310 of valve protecting cover 301 inside that connect and form with the part of the bypass valve oil circuit 100 of said fixing turbine 8; For the elastic force of keeping this piston 310 has inserted valve spring 320, and fixed stopper 330 at its end.And has the circulation groove that communicates with the bypass valve oil circuit in the outside of above-mentioned piston 310.
Said temperature detects valve 200 and is made up of following components: in the above-mentioned lower frame 3, the pressurization stream that communicates for the inner end that forms above-mentioned valve protecting cover 301 and high-voltage section H, and be fixed with in upper end portion of its pressurization stream 201 and prevent that bimetallic material switch panel 210 is divided into the insulation board 220 of purpose.
Like this, apparatus of the present invention are during forming normal compressor operating, and said temperature detects valve 200 because of having blocked pressurization stream 201, so can maintain low-pressure state to the pressure in the pressurization stream 201.At this moment, valve 300 springs of pressure valve 300 have promptly been kept low pressure and have been formed pressure balance.Simultaneously, pressure valve 300 is pulled to pressurization stream 201 1 sides according to the expansive force of valve spring 320, and closes bypass valve oil circuit state.
On the other hand, the temperature of the high-voltage section H of compressor rises to the setting value of temperature detection valve 200 when above, and temperature sense valve 200 two belong to materials and open and close panels 210 and open pressurization stream 201 automatically, and play the effect of high pressure in pressurization stream 201.Like this, the dynamics of the pressure valve 300 of high pressure disequilibrates compression valve spring 320, simultaneously, piston 310 to the circulation groove 311 that valve spring moves and outer periphery by piston 310 forms, is opened bypass valve oil circuit 100.
In this case, the gas of the High Temperature High Pressure of high-voltage section H is discharged into low voltage section L, in order to protect the motor 6 of seal container 1 inside, the motor protection device that is set up is added hot exposure, thus the operation that stops to compress.
Also have after compressor stops, along with cools down, said temperature Inductance valve 200 recovers original state.Recover pressure valve 300 simultaneously.
According to such principle, avoided the temperature in the high-voltage section to exceed setting value, thereby protected compressor.
The technological innovation that prevents overheated device of the turbocompressor of the present invention that above-mentioned structure like this constitutes all has many saving graces for technician of the same trade now, and the progressive that possesses skills really.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (7)
1, a kind of turbocompressor prevent overheated device, it comprises: the high-voltage section (H) of the discharge chamber (21) that the inside upper part of seal container (1) is provided with; The low voltage section (L) that be arranged on the outside of discharging chamber (21) identical with high-voltage section (H); One side of fixed turbine (8) is provided with the bypass valve oil circuit that the high pressure air of high-voltage section (H) portion is discharged into low voltage section (L); And the pressure valve (300) that is provided with in order to close above-mentioned bypass valve oil circuit; And be provided with by the sense temperature of high-voltage section (H) is finished starting pressure valve (300) and be the temperature sense valve (200) of purpose; It is characterized in that: the temperature with above-mentioned high-voltage section (H) is a foundation, and the high pressure air of high-voltage section (H) is discharged into low voltage section (L), and starting is arranged on motor protection device on the motor to stop the operation of compressor.
2, turbocompressor according to claim 1 prevent overheated device, it is characterized in that: valve protecting cover (301) inside, a part that connects bypass valve oil circuit (100) with pressure valve (300) be provided with open and close the bypass valve oil circuit piston (310); In order to keep the elastic force of piston (310), be inserted with valve spring (320), and be installed with stopper (330) at its end.
3, turbocompressor according to claim 1 and 2 prevent overheated device, it is characterized in that above-mentioned bypass valve oil circuit (100) is located in the fixed turbine (8).
4, turbocompressor according to claim 2 prevents overheated device, it is characterized in that said temperature detects valve (200) and is located in the above-mentioned lower frame (3), the inner end of above-mentioned valve protecting cover (301) and high-voltage section (H) are provided with pressurization stream (201); The upper end portion of pressurization stream (201) is provided with insertion groove (202); The upper end portion of insertion groove (202) is installed with the insulation board (220) that prevents bimetal opening and closing plate (210) noise.
5, turbocompressor according to claim 2 prevent overheated device, it is characterized in that above-mentioned piston (310) can close the bypass valve oil circuit between high-voltage section (H) and the low voltage section (L) under normal situation; During compressor generation abnormal operation, by the circulation groove (311) of piston (310) outside, the connection bypass valve oil circuit (100) in above-mentioned hyperbaric chamber (H) and low pressure chamber (L) is discharged into low pressure chamber (L) to the pressurized gas in hyperbaric chamber (H).
6, turbocompressor according to claim 2 prevents overheated device, it is characterized in that above-mentioned piston (310) is drum shape, in the pressure fixing of one end by the pressurization stream (210) of temperature detection valve (200), the other end is then supported by valve spring (320).
7, turbocompressor according to claim 2 prevent overheated device, it is characterized in that the outside of above-mentioned piston (310) is provided with circulation groove ring-type, that connect high-voltage section (H) and low voltage section (L) stream that connects the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410096529 CN1782417A (en) | 2004-11-30 | 2004-11-30 | Overheat preventing device for turine compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410096529 CN1782417A (en) | 2004-11-30 | 2004-11-30 | Overheat preventing device for turine compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1782417A true CN1782417A (en) | 2006-06-07 |
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ID=36772929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410096529 Pending CN1782417A (en) | 2004-11-30 | 2004-11-30 | Overheat preventing device for turine compressor |
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| CN (1) | CN1782417A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536825A (en) * | 2010-12-09 | 2012-07-04 | 财团法人工业技术研究院 | Floating device for scroll compressor |
| CN103867436A (en) * | 2008-07-22 | 2014-06-18 | 厄利孔莱博尔德真空技术有限责任公司 | Vacuum pump in particular roots type pump |
| CN104813029A (en) * | 2012-11-08 | 2015-07-29 | 皮尔伯格泵技术有限责任公司 | Variable displacement lubricant pump |
-
2004
- 2004-11-30 CN CN 200410096529 patent/CN1782417A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867436A (en) * | 2008-07-22 | 2014-06-18 | 厄利孔莱博尔德真空技术有限责任公司 | Vacuum pump in particular roots type pump |
| CN102536825A (en) * | 2010-12-09 | 2012-07-04 | 财团法人工业技术研究院 | Floating device for scroll compressor |
| CN102536825B (en) * | 2010-12-09 | 2014-11-19 | 财团法人工业技术研究院 | scroll compressor with floating device |
| CN104813029A (en) * | 2012-11-08 | 2015-07-29 | 皮尔伯格泵技术有限责任公司 | Variable displacement lubricant pump |
| US9726173B2 (en) | 2012-11-08 | 2017-08-08 | Pierburg Pump Technology Gmbh | Variable displacement lubricant pump for an internal combustion engine with a temperature control valve |
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