CN1704596A - Gear type compressor - Google Patents
Gear type compressor Download PDFInfo
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- CN1704596A CN1704596A CN 200410019366 CN200410019366A CN1704596A CN 1704596 A CN1704596 A CN 1704596A CN 200410019366 CN200410019366 CN 200410019366 CN 200410019366 A CN200410019366 A CN 200410019366A CN 1704596 A CN1704596 A CN 1704596A
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- press part
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Abstract
This invention relates to a gear-type contractor, which comprises the driving part, the compressing part used for compressing coolant by the dynamic from the driving part, the gear-type swelling part used for swell the reflow coolant after flowing from compressing part and chiller; wherein the outline dimensions of the swelling part and compressing part are same. Said contractor can increase the coefficient of performance of refrigerating system, and can uses carbon dioxide to replace traditional coolant, which is benefit for environmental protection; besides, the force and force moment of the inner gear and outer gear are balance, so it can decrease the shake and noise when operating. The same size of compressing part and swelling part makes them can be assembled integrated, and the swelling plate and compressing plate can be used as one element.
Description
Technical field
The present invention relates to a kind of compressor, particularly relate to a kind of gear compressor.
Background technique
Usually, compressor is that a kind of power of drive portion or steam turbine that utilizes is exerted pressure to working fluids such as air, refrigerants, thereby improves the device of working fluid pressure.This compressor is widely used in field of household appliances and production fields such as air-conditioning, refrigerator.Divide by the compression type, compressor can be divided into positive displacement compressor and turbocompressor.Wherein, the compressor that is widely used in production field is a positive displacement compressor, and it adopts by reducing the compress mode that volume comes boost pressure.This positive displacement compressor can be divided into reciprocal compressor and rotary compressor.Reciprocal compressor is to utilize the to-and-fro motion of cylinder interior piston to come compressed fluid, and its advantage is to produce higher compression efficiency with less mechanical realization.But can there be the problem of limited speed because of the to-and-fro motion of piston in this reciprocal compressor, simultaneously, also has the problem that can produce bigger vibration because of the inertia of piston.Rotary compressor is to utilize the revolution of cylinder interior eccentric rotor to come compression working fluid.Compare with reciprocal compressor, rotary compressor can obtain higher compression efficiency with lower speed.And rotary compressor also has the low and little advantage of noise of vibration.For variable flow under certain rotational speed, rotary compressor need discharge remaining air, thereby increases and stabilizer need be set in order to reduce pressure when discharging surplus air, therefore, and its structure more complicated.In addition,, just be easy to generate the leakage of pressurized gas, thereby cause its decreased performance if the slit height in the rotary compressor between each parts keeps inconsistent words.And produce when wearing and tearing, its performance is sharply descended.Therefore, add and to guarantee very high precision man-hour.In addition, under rapid variation in pressure, also be easy to generate the phenomenon that bearing destroys.In a word, above-mentioned rotary compressor has different performances and pluses and minuses separately with reciprocal compressor.
Refrigerating circuit is as the loop on a kind of thermodynamic definitions, and its purpose is to reduce by acting the temperature of low-temp. portion.The system that forms this refrigerating circuit is called refrigeration system.Refrigeration system is mainly used in devices such as refrigerator, air-conditioning.Fig. 1 is the refrigeration system pie graph of prior art.As shown in Figure 1, the refrigeration system of this prior art is made up of compressor 30, condenser 50, expansion valve 40 and vaporizer 60.Compressor 30 can be compressed into high-temperature high-pressure state with refrigerant.The refrigerant that flows out from compressor 30 can outwards be emitted heat and then is condensed into liquid state in condenser 50.The heat insulation expansion of refrigerant that expansion valve 40 can be discharged condenser 50 is with the pressure of rapid reduction refrigerant.The refrigerant that flows through expansion valve 40 can absorb heat from the outside and flash to gaseous state in vaporizer 60.Fig. 2 is that the refrigeration system p-h among Fig. 1 concerns schematic representation.As shown in Figure 2, the compressor 30 in this refrigeration system utilizes circumferential work Wc to come compression refrigerant, and promptly 1 → 2; The refrigerant of compressed machine 30 compressions is outwards emitted heat by condenser 50, and promptly 2 → 3; When flowing through refrigerant behind the condenser 50 through expansion valve 40 by heat insulation expansion, promptly 3 → 4; Absorb heat from the outside when flowing through vaporizer 60 then, promptly 4 → 1.The refrigerant that flows out from vaporizer 60 flows into the compressor 30 again.The coefficient of performance of refrigeration system is defined as the heat Q that low-temp. portion absorbs from vaporizer 60
HRatio with the merit Wc of compressor.In order to form refrigeration system efficiently, need to select suitable refrigerant, make compressor have more effective structure simultaneously.Recently, ozonosphere had destruction, so alternative refrigerant such as carbon dioxide comes into one's own because find traditional freon.Therefore need to use and to guarantee also when substituting refrigerant that refrigerant does not take place to leak and the reliable compressor of mechanical structure.
Summary of the invention
In order to address the above problem, to the object of the present invention is to provide a kind of novel structure and can improve the gear compressor of performance of refrigerant systems coefficient.
In order to achieve the above object, gear compressor provided by the invention comprises drive portion; The gear type press part that utilizes the power of drive portion to compress from the refrigerant that vaporizer flows to; With the gear type bulge that will expand from the refrigerant that flows into again after the gear type press part flows out and flow through condenser; The boundary dimension of described gear type bulge is identical with the boundary dimension of gear type press part.
Described drive portion is by stator and be arranged on the motor that the rotor at stator center position is formed, and rotor can be rotated after stator is connected power supply.
Described gear type press part and gear type bulge are assembled into one.
Described gear type press part comprises main bearing, compression cylinder, outer gear, internal gear and the expansion oplate compressed board of holding concurrently; Main bearing is fixed on the top of motor; The annular compression cylinder body is connected with main bearing, and is arranged on its end face; Outer gear rotatably is arranged in the inner space of compression cylinder; Internal gear is arranged on the inboard of outer gear, and it can receive power and be rotated from drive portion, and is meshed compression refrigerant with outer gear; The expansion oplate compressed board of holding concurrently is connected with compression cylinder, and is arranged on its end face.
Described outer gear has teeth groove, has tooth top and be combined in the internal gear that is rotated on the electric machine rotational axis, and the quantity of teeth groove is more than the quantity of tooth top.
One side of described main bearing is connected with the secondary suction pipe of press part, and it is used for refrigerant is sent into the inner space of outer gear.
The opposite side of described main bearing is provided with the press part discharge tube, and it is used for the refrigerant after the compression is sent to condenser.
Be formed with suction port and exhaust port on the special position of described main bearing respectively.
Described gear type bulge comprises expansion oplate hold concurrently compressed board, expansion cylinder block, outer gear, internal gear and supplementary bearing; The annular expansion cylinder block is arranged on the expansion oplate end face of compressed board of holding concurrently, and is attached thereto and connects; Outer gear rotatably is arranged in the inner space of expansion cylinder block; Internal gear is arranged on the inboard of outer gear, and it can receive power and be rotated from drive portion, and is meshed with outer gear and refrigerant is expanded; Supplementary bearing is arranged on the end face of expansion cylinder block, and is attached thereto and connects.
One side of described supplementary bearing is provided with the bulge suction pipe, and its refrigerant that is used for flowing through condenser is drawn into the inboard of expansion cylinder block.
The opposite side of described supplementary bearing is provided with the bulge discharge tube, and it is used for the refrigerant after expanding is sent to vaporizer.
Be formed with suction port and exhaust port on the special position of described supplementary bearing respectively.
Described gear compressor also has the shell that can surround drive portion, gear type press part and gear type bulge.
Described gear compressor also has the shell that can surround gear type press part and gear type bulge.
Gear compressor provided by the invention can improve the coefficient of performance of refrigeration system, and can replace traditional refrigerant with refrigerants such as carbon dioxide, thereby is beneficial to the protection environment.Because the spreadable life of carbon dioxide is long, and does not have toxicity, and has non-flammable characteristics, and its price is also very low, resource is very abundant, and does not have necessity of recovery.Carbon dioxide is dissolved in the lubricant oil easily, and per unit volume is 5 times of CFC series R-22 than refrigerating capacity.Therefore, when freezing under same power, its working volume is very little, and compression ratio is also very little.In addition, the internal gear in the gear compressor provided by the invention and the power of outer gear and torque ratio are balanced, the vibration and the noise that produce in the time of therefore can reducing compressor operating.In gear compressor provided by the invention, the gear type press part is identical with the boundary dimension of gear type bulge, thereby can be assembled into one, thereby can improve packaging efficiency.In addition, the expansion oplate compressed board of holding concurrently uses as parts, thereby can reduce the quantity of parts and simplify assembling procedure.
Description of drawings
Below in conjunction with the drawings and specific embodiments gear compressor of the present invention is elaborated.
Fig. 1 is the refrigeration system pie graph of prior art.
Fig. 2 is that the refrigeration system p-h among Fig. 1 concerns schematic representation.
Fig. 3 is a gear compressor longitudinal construction sectional view provided by the invention.
Fig. 4 A is the I-I line sectional view among Fig. 3.
Fig. 4 B is the II-II line sectional view among Fig. 3.
Fig. 5 is for adopting the refrigeration system pie graph of compressor provided by the invention.
Fig. 6 is the moment variations comparison diagram that compressor provided by the invention and prior art compressor produce.
Drawing reference numeral:
1: shell 100: suction pipe
110: power supply terminal 120: base plate
2: drive portion 200: stator
210: rotor 220: electric machine rotational axis
3: gear type press part 300: main bearing
300a: suction port 300b: exhaust port
310: compression cylinder 320: outer gear
320a: teeth groove 330: internal gear
330a: tooth top 340: the expansion oplate compressed board of holding concurrently
350: the secondary suction pipe 360 of press part: press part discharge tube
4: gear type bulge 410: expansion cylinder block
420: outer gear 420a: teeth groove
430: internal gear 430a: tooth top
440: supplementary bearing 440a: suction port
440b: exhaust port 450: bulge suction pipe
460: bulge discharge tube 5: condenser
6: vaporizer
Embodiment
To shown in Figure 5, gear compressor provided by the invention comprises shell 1, drive portion 2, gear type press part 3 and gear type bulge 4 as Fig. 3.Shell 1 has certain inside space.Drive portion 2 is arranged on the inside of shell 1.Gear type press part 3 is that the refrigerant that utilizes power that drive portion 2 provides that vaporizer 6 is discharged compresses.The refrigerant that gear type press part 3 is discharged flows through the gear type bulge 4 that flows into compressor inside behind the condenser 5 again and expands.Drive portion 2 is by being arranged on the stator 200 on shell 1 inwall and being arranged on the motor that the rotor 210 in stator 200 center portions is formed.Behind power supply terminal 110 connection power supplys, rotor 210 can be rotated.One side of shell 1 is provided with and is used for to its inner suction pipe 100 that sucks refrigerant.And the bottom of shell 1 has the base plate 120 that is used to be provided with compressor.Gear type press part 3 comprises main bearing 300, compression cylinder 310, outer gear 320, internal gear 330 and the expansion oplate compressed board 340 of holding concurrently.Main bearing 300 is fixed on the motor top in the shell 1.Annular compression cylinder body 310 is connected with main bearing 300, and is arranged on its end face.Outer gear 320 rotatably is arranged in the inner space of compression cylinder 310.Internal gear 330 is arranged on the inboard of outer gear 320, and it can and be rotated from drive portion 2 reception power, and is meshed compression refrigerant with outer gear 320.The expansion oplate compressed board 340 of holding concurrently is connected with compression cylinder 310, and is arranged on its end face.One side of main bearing 300 is connected with the secondary suction pipe 350 of press part, and it can be used for the refrigerant that flows to shell 1 inside is delivered to by compression cylinder 310 inner space of outer gear 320.The opposite side of main bearing 300 is provided with press part discharge tube 360, and it can be used for the refrigerant after the compression is sent to condenser 5.Be formed with suction port 300a and exhaust port 300b on the special position of main bearing 300 respectively.Gear type bulge 4 comprises compressed board hold concurrently expansion oplate 340, expansion cylinder block 410, outer gear 420, internal gear 430 and supplementary bearing 440.Annular expansion cylinder block 410 is arranged on the compressed board end face of expansion oplate 340 of holding concurrently, and is attached thereto and connects.Outer gear 420 rotatably is arranged in the inner space of expansion cylinder block 410.Internal gear 430 is arranged on the inboard of outer gear 420, and it can and be rotated from drive portion 2 reception power, and is meshed so that refrigerant expands with outer gear 420.Supplementary bearing 440 is arranged on the end face of expansion cylinder block 410, and is attached thereto and connects.One side of supplementary bearing 440 is provided with bulge suction pipe 450, and its refrigerant that is used for flowing through condenser 5 is drawn into the inboard of expansion cylinder block 410.The opposite side of supplementary bearing 440 is provided with bulge discharge tube 460, and it is used for the refrigerant after expanding is sent to vaporizer 6.Be formed with suction port 440a and exhaust port 440b on the special position of supplementary bearing 440 respectively.The boundary dimension of gear type bulge 4 is identical with the boundary dimension of gear type press part 3.Promptly, supplementary bearing 440 and expansion cylinder block 410 and compressed board the hold concurrently boundary dimension of compressed board 340 of boundary dimension and the main bearing 300 of expansion oplate 340 and compression cylinder 310 and expansion oplate of holding concurrently is identical, thereby easily gear type press part 3 and gear type bulge 4 are assembled into one, thereby can improve its packaging efficiency.In more detail, the hold concurrently outer rim position of compressed board 340, expansion cylinder block 410 and supplementary bearing 440 of main bearing 300, compression cylinder 310, expansion oplate is formed with assembly hole 301,311,341,411,441 respectively.Elder generation is with each assembly hole 301,311,341 during assembling, 411,441 vertically alignment to form connected state, utilize assembling part such as bolt with each assembly hole 301 then, 311,341,411,441 fit together, thereby gear type press part 3 and gear type bulge 4 are assembled into one, thereby can improve packaging efficiency.
Below, with reference to Fig. 3 to Fig. 6 the effect of gear compressor of the present invention is described.To shown in Figure 5,, in gear type press part 3, carry out the compression of refrigerant as Fig. 3 along with the work of drive portion 2.Compressed refrigerant flows in the condenser 5 by pipeline in gear type press part 3, and outwards emits heat Q when flowing through condenser 5
LThe refrigerant that flows through behind the condenser 5 flows in the gear type bulge 4 of compressor of the present invention by pipeline.Refrigerant expands when flowing through gear type bulge 4.Flow through refrigerant behind the gear type bulge 4 with in the inflow evaporator 6.When flowing through vaporizer 6, refrigerant can absorb heat Q from the outside
HThe refrigerant that flows through behind the vaporizer 6 flows in the gear type press part 3 again.When carrying out the above-mentioned a series of refrigerating circuit that just formed when mobile repeatedly.Below with reference to Fig. 3 and Fig. 5 in above-mentioned refrigerating circuit, utilizing gear compressor provided by the invention and carry out the compression of refrigerant and the process of expansion being elaborated.The drive portion 2 that at first will be installed on shell 1 inwall is connected power supply, makes between stator 200 and the rotor 210 and produces electromagnetic action, thereby rotor 210 is rotated.At this moment, suck refrigerant by the suction pipe 100 that is arranged on shell 1 one sides to the inside of shell 1.The refrigerant that flows to shell 1 inside will flow into the inner space of outer gear 320 by being connected hold concurrently secondary suction pipe 350 on the compressed board 340 of expansion oplate.At this moment, flow through the secondary suction pipe 350 of press part refrigerant will by with main bearing 300 that outer gear 320 inner spaces are connected on suction port 300a flow to the inner space of outer gear 320.The refrigerant that flows to outer gear 320 inner spaces can be compressed under the turning effort of the internal gear 330 that combines with electric machine rotational axis 220 gradually, flow through the exhaust port 300b and press part discharge tube 360 outflows that are formed on the main bearing 300 then, be sent to condenser 5 at last by being connected with exhaust port 300b.Here, the exhaust port 300b sectional area of gear type press part 3 is littler than suction port 300a sectional area.The refrigerant that carries out in condenser 5 after the heat exchange will flow in the gear type bulge 4 of gear compressor provided by the invention again.That is, in condenser 5, carry out refrigerant after the heat exchange through being connected supplementary bearing 440 1 sides bulge suction pipe 450 and flow into the inner space of outer gear 420 by the suction port 440a on the supplementary bearing 440.After refrigerant flows to outer gear 420 inner spaces, under internal gear 430 turning efforts that combine with electric machine rotational axis 220, expand gradually.Afterwards, drain into vaporizer 6 by exhaust port 440b that is formed on supplementary bearing 440 opposite sides and the discharge tube 460 that links to each other with exhaust port 440b.The exhaust port 440b sectional area of gear type bulge 4 is bigger than suction port 440a sectional area.Identical with the situation of the foregoing description, gear type press part 3 and gear type bulge 4 are preferably disposed on the inside of same shell, but also can be separately positioned in the different shells.In addition, drive portion 2 also can be arranged on the outside of shell 1.Drive portion 2 is to adopt the motor can utilize electric energy to produce rotating force among the present invention, as long as but can produce power and also can adopt any other drive unit.
Fig. 4 A demonstrates the internal gear 330 of composition gear type press part 3 and the geometrical shape of outer gear 320.The teeth groove 320a quantity of outer gear 320 is more than the tooth top 330a quantity of internal gear 330.The rotating center of the internal gear 330 that combines with electric machine rotational axis 220 and be rotated is in eccentric position, and the rotating center of outer gear 320 also is in eccentric position.Usually, the tooth top 330a number of internal gear 330 is lacked than the teeth groove 320a number of outer gear 320, and tooth top 330a is advisable to have slick and sly curved shape.
Fig. 4 B demonstrates the internal gear 430 of composition gear type bulge 4 and the geometrical shape of outer gear 420.The internal gear 430 of gear type bulge 4 is identical with outer gear 320 structures with the internal gear 330 of gear type press part 3 with the structure of outer gear 420, just varies in size.
Fig. 6 is the moment variations comparison diagram that compressor provided by the invention and prior art compressor produce.Each moment T that produces when wherein the longitudinal axis is for rotation and the ratio of moment mean value Tm, and transverse axis is represented angle of swing.As shown in Figure 6, compare with the compressor with other structure, the moment variations amount that produces during gear compressor compression refrigerant provided by the invention is significantly reduced.When gear compressor provided by the invention compression and expansion refrigerant, internal gear 330,430 and outer gear 320,420 are rotated together, thereby can guarantee the equilibrium on the moment, thereby vibration and noise are lower.In gear compressor provided by the invention, a plurality of tooth top 330a of internal gear 330,430, a plurality of teeth groove 320a of 430a and outer gear 320,420,420a contacts, thereby can prevent that the power that internal gear transmits to outer gear from concentrating on certain a bit.In addition, in gear compressor provided by the invention, the tooth top 330a of internal gear 330,430, the teeth groove 320a of 430a and outer gear 320,420, the speed difference between the 420a on point of contact is very little.
Gear compressor provided by the invention can utilize carbon dioxide to use as refrigerant.Because the spreadable life of carbon dioxide is long, and does not have toxicity, and has non-flammable characteristics, and its price is also very low, resource is very abundant, and does not have necessity of recovery.Carbon dioxide is dissolved in the lubricant oil easily, and per unit volume is 5 times of CFC series R-22 than refrigerating capacity.Therefore, when freezing under same power, its working volume is very little, and compression ratio is also very little.Gear compressor provided by the invention can be given full play to above-mentioned advantage as refrigerant by adopting carbon dioxide.
Claims (14)
1, a kind of gear compressor is characterized in that: described gear compressor comprises drive portion (2); The gear type press part (3) that utilizes the power of drive portion (2) to compress from the refrigerant that vaporizer (6) flow to; With will flow out and flow through the gear type bulge (4) that the refrigerant that flows into again behind the condenser (5) expands from gear type press part (3); The boundary dimension of described gear type bulge (4) is identical with the boundary dimension of gear type press part (3).
2, gear compressor according to claim 1, it is characterized in that: described drive portion (2) is by stator (200) and be arranged on the motor that the rotor (210) in stator (200) center portion is formed, and rotor (210) can be rotated after stator (200) is connected power supply.
3, gear compressor according to claim 1 is characterized in that: described gear type press part (3) and gear type bulge (4) are assembled into one.
4, gear compressor according to claim 1 is characterized in that: described gear type press part (3) comprises main bearing (300), compression cylinder (310), outer gear (320), internal gear (330) and the expansion oplate compressed board (340) of holding concurrently; Main bearing (300) is fixed on the top of motor; Annular compression cylinder body (310) is connected with main bearing (300), and is arranged on its end face; Outer gear (320) rotatably is arranged in the inner space of compression cylinder (310); Internal gear (330) is arranged on the inboard of outer gear (320), and it can and be rotated from drive portion (2) reception power, and is meshed compression refrigerant with outer gear (320); The expansion oplate compressed board (340) of holding concurrently is connected with compression cylinder (310), and is arranged on its end face.
5, gear compressor according to claim 4, it is characterized in that: described outer gear (320) has teeth groove (320a), have tooth top (330a) and be combined in the internal gear (330) that is rotated on the electric machine rotational axis (220), the quantity of teeth groove (320a) is more than the quantity of tooth top (330a).
6, gear compressor according to claim 4 is characterized in that: a side of described main bearing (300) is connected with the secondary suction pipe (350) of press part, and it is used for refrigerant is sent into the inner space of outer gear (320).
7, gear compressor according to claim 4 is characterized in that: the opposite side of described main bearing (300) is provided with press part discharge tube (360), and it is used for the refrigerant after the compression is sent to condenser (5).
8, gear compressor according to claim 4 is characterized in that: be formed with suction port (300a) and exhaust port (300b) on the special position of described main bearing (300) respectively.
9, gear compressor according to claim 1 is characterized in that: described gear type bulge (4) comprises expansion oplate hold concurrently compressed board (340), expansion cylinder block (410), outer gear (420), internal gear (430) and supplementary bearing (440); Annular expansion cylinder block (410) is arranged on the expansion oplate end face of compressed board (340) of holding concurrently, and is attached thereto and connects; Outer gear (420) rotatably is arranged in the inner space of expansion cylinder block (410); Internal gear (430) is arranged on the inboard of outer gear (420), and it can receive power and be rotated from drive portion (2), and is meshed with outer gear (420) and refrigerant is expanded; Supplementary bearing (440) is arranged on the end face of expansion cylinder block (410), and is attached thereto and connects.
10, gear compressor according to claim 9 is characterized in that: a side of described supplementary bearing (440) is provided with bulge suction pipe (450), and its refrigerant that is used for flowing through condenser (5) is drawn into the inboard of expansion cylinder block (410).
11, gear compressor according to claim 9 is characterized in that: the opposite side of described supplementary bearing (440) is provided with bulge discharge tube (460), and it is used for the refrigerant after expanding is sent to vaporizer (6).
12, gear compressor according to claim 9 is characterized in that: be formed with suction port (440a) and exhaust port (440b) on the special position of described supplementary bearing (440) respectively.
13, gear compressor according to claim 1 is characterized in that: described gear compressor also has the shell (1) that can surround drive portion (2), gear type press part (3) and gear type bulge (4).
14, gear compressor according to claim 1 is characterized in that: described gear compressor also has the shell (1) that can surround gear type press part (3) and gear type bulge (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410019366 CN1704596A (en) | 2004-05-27 | 2004-05-27 | Gear type compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410019366 CN1704596A (en) | 2004-05-27 | 2004-05-27 | Gear type compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1704596A true CN1704596A (en) | 2005-12-07 |
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ID=35576679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410019366 Pending CN1704596A (en) | 2004-05-27 | 2004-05-27 | Gear type compressor |
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| Country | Link |
|---|---|
| CN (1) | CN1704596A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893349A (en) * | 2010-06-25 | 2010-11-24 | 蔡茂林 | Twin-cylinder reciprocating pressure energy reclaiming heat-pump mechanism |
| CN101680301B (en) * | 2007-05-16 | 2011-12-14 | 松下电器产业株式会社 | Expander-integrated compressor and refrigeration cycle device with the same |
-
2004
- 2004-05-27 CN CN 200410019366 patent/CN1704596A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101680301B (en) * | 2007-05-16 | 2011-12-14 | 松下电器产业株式会社 | Expander-integrated compressor and refrigeration cycle device with the same |
| CN101893349A (en) * | 2010-06-25 | 2010-11-24 | 蔡茂林 | Twin-cylinder reciprocating pressure energy reclaiming heat-pump mechanism |
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