CN103511266A - Rotary compressor - Google Patents

Rotary compressor Download PDF

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Publication number
CN103511266A
CN103511266A CN201310121785.3A CN201310121785A CN103511266A CN 103511266 A CN103511266 A CN 103511266A CN 201310121785 A CN201310121785 A CN 201310121785A CN 103511266 A CN103511266 A CN 103511266A
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CN
China
Prior art keywords
compression
intakeport
gas
compression chamber
slide plate
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Pending
Application number
CN201310121785.3A
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Chinese (zh)
Inventor
杨国用
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Midea Toshiba Compressor Corp
Guangdong Meizhi Compressor Co Ltd
Original Assignee
Guangdong Meizhi Compressor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Guangdong Meizhi Compressor Co Ltd filed Critical Guangdong Meizhi Compressor Co Ltd
Priority to CN201310121785.3A priority Critical patent/CN103511266A/en
Publication of CN103511266A publication Critical patent/CN103511266A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a rotary compressor. The rotary compressor comprises a housing, a compression device, an air suction pipe and an air exhaust opening. The compression device is arranged in the housing, and comprises a first compression unit and a second compression unit; the inside of the first compression unit is provided with a first compression chamber, and the inside of the second compression unit is provided with a second compression chamber; a first air inlet and a first air outlet are arranged on the first compression chamber, and a second air inlet and a second air outlet are arranged on the second compression chamber; the volume of the second compression chamber is larger than that of the first compression chamber; the air suction pipe is communicated with the first air inlet, the second air inlet and the second air outlet respectively via valve body assemblies, wherein under a first operating mode, the air suction pipe is communicated with the first air inlet, and the second air inlet and the second air outlet are communicated, and under a second operating mode, the air suction pipe is communicated with the second air inlet, and the second air outlet and the first air inlet are communicated; and the air exhaust opening is arranged on the housing for exhaust of compressed gas. Gas transmission performance and heating effect of the rotary compressor are excellent.

Description

Rotary compressor
Technical field
The present invention relates to art of refrigeration units, especially relate to a kind of rotary compressor.
Background technique
The rotary compressor that traditional single twin-stage switches, changeable when compression load is large be Two-stage Compression, can effectively improve the problem that system compresses is brought than increase, compression load is hour changeable is single stage compression, can improve the operational efficiency of the common operating mode of compressor.Yet, when low-temperature heating moves, because ambient temperature reduces, heating capacity sharp-decay, this compressor can not regulate first order gas transmission ability, and cryogenic applications effect is poor.
Summary of the invention
The present invention is intended at least solve one of technical problem existing in prior art.For this reason, one object of the present invention is to propose a kind of simple and reasonable and rotary compressor that low-temperature heating is effective.
Rotary compressor according to the embodiment of the present invention, comprising: housing, compression set, described compression set is located in described housing and comprises the first compression set and the second compression set, in described the first compression set and described the second compression set, limit respectively the first compression chamber and the second compression chamber, in described the first compression chamber and described the second compression chamber, be formed with respectively the first intakeport and first row gas port, the second intakeport and second row gas port, the volume of wherein said the second compression chamber is greater than the volume of described the first compression chamber, sucking pipe, described sucking pipe by valve component respectively with described the first intakeport, described the second intakeport and described second row gas port communicate, wherein under the first mode of operation described sucking pipe and described the first intakeport pass to mutually the gas entering from described sucking pipe is carried out to first compression and described the second intakeport communicate with described second row gas port so that described the second compression set in idling conditions, under the second mode of operation, described sucking pipe and described the second intakeport pass to mutually and the gas entering from described sucking pipe is carried out to first compression and described second row gas port and described the first intakeport pass to mutually the gas recompression first compression, and relief opening, described relief opening is located on described housing to discharge the gas after compression.
According to the rotary compressor of the embodiment of the present invention, by the second compression chamber that volume is larger is set, when rotary compressor is under the second mode of operation, in the second compression chamber, can hold more gas to be compressed, thereby the gas transmission ability of compressor improves, heating effect while greatly having improved the working efficiency of rotary compressor and low-temperature heating application, and this rotary compressor can switch easily between the first mode of operation and the second mode of operation, in system compresses when large, adopt the second mode of operation to carry out twice compression, system compresses is carried out first compression than hour employing first mode of operation, avoid still adopting the second mode of operation and causing the low inferior problem of system running efficiency at system compresses ratio hour.In addition, this rotary compressor simple in structure, running efficiency is high, and using scope is wide.
In addition, according to rotary compressor of the present invention, also can there is following additional technical feature:
According to one embodiment of present invention, in described the first compression chamber and described the second compression chamber, be formed with respectively for holding the first vane slot and second vane slot of the first slide plate and the second slide plate, wherein said the first slide plate and described the second slide plate are located at respectively in described the first vane slot and described the second vane slot movably.
Further, described rotary compressor further comprises: arrestment mechanism, described arrestment mechanism is located at one end of described the second slide plate, and described arrestment mechanism is formed at described arrestment mechanism under described the first mode of operation and brakes described the second slide plate so that it is contained in described the second vane slot.Thus, by arrestment mechanism is set, under the first mode of operation, the second slide plate is contained in completely and stably in the second vane slot and can contact with the second rolling piston in the second compression chamber.
Alternatively, described arrestment mechanism is the elastic component that is connected to one end of described the second slide plate, and described elastic component often pulls to the other end of described the second slide plate in described the second vane slot.Thus, processing is simple and cost is low.
Particularly, described the first slide plate is located in described the first vane slot movably by spring, described the second slide plate is located in described the second vane slot movably by driving force, described the second vane slot is communicated with described housing away from one end of described the second compression chamber, wherein said driving force is produced by the pressure difference between described the second intakeport and described housing, under described the second mode of operation, the braking force that described arrestment mechanism acts on described the second slide plate is less than described driving force.Thus, when the second driving force is greater than the braking force of arrestment mechanism, the second slide plate stretches out the second vane slot only to support the second rolling piston in the second compression chamber, thereby by the gas compression entering in the second compression chamber.
Alternatively, described braking force is less than the described driving force that described pressure difference is 0.1~0.5MPa.Thus, when rotary compressor enters the second mode of operation, driving force can overcome braking force easily so that the second slide plate only supports the second rolling piston.
Preferably, described braking force is less than the described driving force that described pressure difference is roughly 0.3MPa.Thus, driving force can overcome braking force more easily.
According to one embodiment of present invention, described rotary compressor also comprises: gas-liquid separator, described gas-liquid separator is located on the path being connected with described sucking pipe.Thus, by gas-liquid separator is set, can be effectively by the material gas-liquid separation entering from sucking pipe.
Alternatively, described gas-liquid separator is that one and a described gas-liquid separator are located between described sucking pipe and described valve component.
Or alternatively, described gas-liquid separator is that one end of two and described two gas-liquid separators communicates with described the first intakeport and described the second intakeport respectively, and the other end of described two gas-liquid separators communicates with described valve component respectively.
According to one embodiment of present invention, described second row gas port is provided with air injection enthalpy-increasing part with the path that described the first intakeport is connected.Thus, by air injection enthalpy-increasing part is set, can increase enthalpy refrigerant to spraying in the gas after first compression, improve the displacement of secondary compression and reduce the delivery temperature of secondary compression.
Further, described air injection enthalpy-increasing part is the air injection enthalpy-increasing pipe with control valve, and whether wherein said control valve sprays refrigerant for controlling.Thus, by control valve is set, whether can effectively control to spraying in the gas after first compression and increase enthalpy refrigerant, and controlled coolant quantity processed.
Alternatively, described control valve is one-way control valve.Thus, simple in structure and cost is low.
Alternatively, described valve component is four-way switching valve.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination obviously and is easily understood becoming embodiment's description, wherein:
Fig. 1 is the schematic diagram of rotary compressor under the first mode of operation according to an embodiment of the invention;
Fig. 2 is the schematic diagram of rotary compressor under the second mode of operation according to an embodiment of the invention;
Fig. 3 is the schematic diagram of rotary compressor under the first mode of operation in accordance with another embodiment of the present invention;
Fig. 4 is the schematic diagram of rotary compressor under the second mode of operation in accordance with another embodiment of the present invention.
Description of reference numerals:
100: rotary compressor;
1: housing;
21: the first cylinders; 211: the first intakepories; 212: first row gas port;
213: the first compression chamber;
22: the first slide plates; 221: spring; 23: the first rolling pistons;
24: the second cylinders; 241: the second intakepories; 242: second row gas port;
243: the second compression chamber;
25: the second slide plates; 251: arrestment mechanism; 26: the second rolling pistons;
27: upper bearing (metal); 28: lower bearing; 281: exhaust cavity; 29: dividing plate;
3: sucking pipe; 31: four-way switching valve; 4: relief opening; 5: gas-liquid separator;
6: air injection enthalpy-increasing pipe; 61: control valve;
101: eccentric crankshaft; 1011: the first eccentric parts; 1012: the second eccentric parts.
Embodiment
Describe embodiments of the invention below in detail, described embodiment's example is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment who is described with reference to the drawings, be exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, orientation or the position relationship of the indications such as term " " center ", " on ", D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward " be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; rather than the device of indication or hint indication or element must have specific orientation, with specific orientation structure and operation, so can not be interpreted as limitation of the present invention.In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characteristics.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, except as otherwise noted, the implication of " a plurality of " is two or more.
In description of the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand above-mentioned term concrete meaning in the present invention.
Below with reference to Fig. 1-Fig. 4, describe according to the rotary compressor 100 of the embodiment of the present invention, this rotary compressor 100 can be used for chiller plant for example in air conditioner, refrigerator.
As depicted in figs. 1 and 2, the rotary compressor 100 according to the embodiment of the present invention, comprising: housing 1, compression set, sucking pipe 3 and relief opening 4.Compression set is located in housing 1 and comprises the first compression set and the second compression set, in the first compression set and the second compression set, limit respectively the first compression chamber 213 and the second compression chamber 243, in the first compression chamber 213 and the second compression chamber 243, be formed with respectively the first intakeport 211 and first row gas port 212, the second intakeport 241 and second row gas port 242, wherein the volume of the second compression chamber 243 is greater than the volume of the first compression chamber 213.
That is to say, in the first compression set, limit the first compression chamber 213, and in the first compression chamber 213, be formed with respectively the first intakeport 211 and first row gas port 212, in the second compression set, limit the second compression chamber 243, and in the second compression chamber 243, be formed with respectively the second intakeport 241 and second row gas port 242, wherein the volume of the second compression chamber 243 is greater than the volume of the first compression chamber 213.
For example, in the example of Fig. 1, the first compression set and the second compression set each interval on is vertically arranged, and the first compression set is located at the top of the second compression set.Particularly, the first compression set comprises the first cylinder 21, the first rolling piston 23 and the first slide plate 22.The first cylinder 21 top and bottom are all opened wide, upper bearing (metal) 27 and dividing plate 29 are located at respectively the first cylinder 21 top and bottom jointly to limit the first compression chamber 213 with the first cylinder 21, in the first compression chamber 213, be formed with respectively the first intakeport 211 and first row gas port 212, the first rolling piston 23 is located at prejudicially in the first compression chamber 213 and can rolls along the inwall of the first compression chamber 213, in the first compression chamber 213, be formed with the first vane slot radially extending along it, the first slide plate 22 is located in the first vane slot movably.Correspondingly, the second compression set comprises the second cylinder 24, the second rolling piston 26 and the second slide plate 25.The second cylinder 24 top and bottom are all opened wide, dividing plate 29 and lower bearing 28 are located at respectively the second cylinder 24 top and bottom jointly to limit the second compression chamber 243 with the second cylinder 24, in the second compression chamber 243, be formed with respectively the second intakeport 241 and second row gas port 242, the second rolling piston 26 is located at prejudicially in the second compression chamber 243 and can rolls along the inwall of the second compression chamber 243, in the second compression chamber 243, be formed with the second vane slot radially extending along it, the second slide plate 25 is located in the second vane slot movably.Alternatively, the first cylinder 21 and the second cylinder 24 are all roughly cylindrical.
Certainly, the invention is not restricted to this, in other examples of the present invention, the first compression set also can be located at the below (scheming not shown) of the second compression set.
As Figure 1-Figure 4, rotary compressor 100 according to the present invention also comprises driver and eccentric crankshaft 101, driver is located in housing 1, eccentric crankshaft 101 by driver drives, rotated and eccentric crankshaft 101 lower end successively through upper bearing (metal) 27 and dividing plate 29 to extend in the first compression chamber 213 and the second compression chamber 243, on eccentric crankshaft 101, corresponding the first rolling piston 23 and the second rolling piston 26 position are respectively equipped with the first eccentric part 1011 and the second eccentric part 1012 to drive respectively the first rolling piston 23 and the second rolling piston 26 to do eccentric motion.Alternatively, driver is motor.It should be noted that, the structure of driver and eccentric crankshaft 101 and working principle etc. have been prior art, and are known by those skilled in the art, no longer describe in detail here.
Sucking pipe 3 by valve component respectively with the first intakeport 211, the second intakeport 241 and second row gas port 242 communicate, wherein under the first mode of operation sucking pipe 3 and the first intakeport 211 pass to mutually the gas entering from sucking pipe 3 is carried out to first compression and the second intakeport 241 communicate with second row gas port 242 so that the second compression set in idling conditions, under the second mode of operation, sucking pipe 3 and the second intakeport 241 pass to mutually and the gas entering from sucking pipe 3 is carried out to first compression and second row gas port 242 and the first intakeport 211 pass to mutually the gas recompression first compression.Alternatively, valve component is four-way switching valve 31.
Relief opening 4 is located on housing 1 to discharge the gas after compression.For example, in the example of Fig. 1-Fig. 4, relief opening 4 is located at the top of housing 1.Certainly, the invention is not restricted to this, in other examples of the present invention, relief opening 4 also can be located at other positions of housing 1, and is not limited to top.
In other words, when compression load hour, rotary compressor 100 can switch to the first mode of operation, now sucking pipe 3 is connected with the first intakeport 211 in the first compression chamber 213, thereby the gas to be compressed entering from sucking pipe 3 is entered in the first compression chamber 213 and is carried out first compression by valve component, gas after compression is discharged via the relief opening 4 on housing 1 by the first row gas port 212 in the first compression chamber 213, and the second intakeport 241 in the second compression chamber 243 is connected with second row gas port 242, when the second slide plate 25 does not contact with the second rolling piston 26, although now the second rolling piston 26 is in the interior rolling of the second compression chamber 243, but the pressure at the second intakeport 241 and second row gas port 242 places is roughly the same.When compression load is larger, rotary compressor 100 can switch to the second mode of operation, now sucking pipe 3 is connected with the second intakeport 241 in the second compression chamber 243, thereby the gas to be compressed entering from sucking pipe 3 enters in the second compression chamber 243 and carries out first compression, second row gas port 242 is connected with the first intakeport 211, thereby the gas after first compression is successively by the second row gas port 242 in the second compression chamber 243, valve component, the first intakeport 211 in the first compression chamber 213 enters in the first compression chamber 213 and carries out secondary compression, then the gas after secondary compression is discharged via the relief opening 4 on housing 1 by the first row gas port 212 in the first compression chamber 213.
According to the rotary compressor 100 of the embodiment of the present invention, by the second compression chamber 243 that volume is larger is set, when rotary compressor 100 is under the second mode of operation, in the second compression chamber 243, can hold more gas to be compressed, thereby the gas transmission ability of compressor improves, heating effect while greatly having improved the working efficiency of rotary compressor 100 and low-temperature heating application, and this rotary compressor 100 can switch easily between the first mode of operation and the second mode of operation, in system compresses when large, adopt the second mode of operation to carry out twice compression, system compresses is carried out first compression than hour employing first mode of operation, avoid still adopting the second mode of operation and causing the low inferior problem of system running efficiency at system compresses ratio hour.In addition, this rotary compressor 100 simple in structure, running efficiency is high, and using scope is wide.
In one embodiment of the invention, the first compression chamber 213 and the second compression chamber 243 are interior to be formed with respectively for holding the first vane slot and second vane slot of the first slide plate 22 and the second slide plate 25, and wherein the first slide plate 22 and the second slide plate 25 are located at respectively in the first vane slot and the second vane slot movably.That is to say, in the first compression chamber 213, be formed with for holding the first vane slot of the first slide plate 22, the first slide plate 22 is located in the first vane slot movably, in the second compression chamber 243, be formed with for holding the second vane slot of the second slide plate 25, the second slide plate 25 is located in the second vane slot movably.
In the example of Fig. 1-Fig. 4, the first compression chamber 213 and the second compression chamber 243 are interior to be formed respectively by the first vane slot radially extending along it and the second vane slot, and the first slide plate 22 and the second slide plate 25 are radially located in the first vane slot and the second vane slot movably along the first compression chamber 213 and the second compression chamber 243 respectively.
Further, rotary compressor 100 further comprises: arrestment mechanism 251, arrestment mechanism 251 is located at second slide plate 25 one end, and arrestment mechanism 251 is formed at arrestment mechanism 251 braking the second slide plates 25 under the first mode of operation so that it is contained in the second vane slot.For example, in the example of Fig. 1-Fig. 4, arrestment mechanism 251 be located at the second slide plate 25 away from second rolling piston 26 one end, the other end of the second slide plate 25 can extend in the second compression chamber 243 only to support the second rolling piston 26, under the first mode of operation, by the braking action of arrestment mechanism 251, the second slide plate 25 can be completely and is stably contained in the second vane slot and can contact with the second rolling piston 26 in the second compression chamber 243.
Particularly, arrestment mechanism 251 is for being connected to the elastic component of second slide plate 25 one end, and elastic component often pulls to the other end of the second slide plate 25 in the second vane slot.That is to say, when the second slide plate 25 is not subject to external force, the second slide plate 25 will be contained in completely in the second vane slot under the effect of elastic component.Thus, processing is simple and cost is low.Alternatively, elastic component is extension spring magnetic material that maybe can produce suction etc.
Particularly, the first slide plate 22 is located in the first vane slot movably by spring 221, the second slide plate 25 is located in the second vane slot movably by driving force, the second vane slot is communicated with housing 1 away from second 243 of compression chamber one end, wherein driving force is produced by the pressure difference between the second intakeport 241 and housing 1, now housing 1 is airtight, and under the second mode of operation, the braking force that arrestment mechanism 251 acts on the second slide plate 25 is less than driving force.For example, in the example of Fig. 1-Fig. 4, spring 221 be connected to the first slide plate 22 away from first rolling piston 23 one end, the other end of the first slide plate 22 extend in the first compression chamber 213 only to support the first rolling piston 23, under the effect of driving force, vicinity second rolling piston 26 one end of the second slide plate 25 extend in the second compression chamber 243 only to the second rolling piston 26, under the second mode of operation, the driving force that pressure difference between the second intakeport 241 and housing 1 produces should be greater than the braking force of 251 pairs of the second slide plates 25 of arrestment mechanism, thereby extended the second vane slot of the second slide plate 25 is only to support the second rolling piston 26 in the second compression chamber 243, thereby by the gas compression entering in the second compression chamber 243.
Alternatively, braking force is less than the driving force that pressure difference is 0.1~0.5MPa.That is to say, the size of the braking force that 251 pairs of the second slide plates 25 of arrestment mechanism apply should be less than and act on the driving force that the pressure difference on the second slide plate 25 is 0.1~0.5MPa, like this, when rotary compressor 100 enters the second mode of operation, driving force can overcome braking force easily so that the second slide plate 25 only supports the second rolling piston 26.
Preferably, braking force is less than the driving force that pressure difference is roughly 0.3MPa.Thus, driving force can overcome braking force more easily.Here, it should be noted that, " being roughly 0.3MPa " can be understood as difference that pressure difference equals 0.3MPa or pressure difference and 0.3MPa in a very little scope, and for example difference range is in tenths level or hundredths level.
In one embodiment of the invention, second row gas port 242 is provided with air injection enthalpy-increasing part with the path that the first intakeport 211 is connected, as shown in Figure 2 and Figure 4.Under the second mode of operation, air injection enthalpy-increasing part can increase enthalpy refrigerant to spraying in the gas after first compression, thereby can improve the displacement of secondary compression and reduce the delivery temperature of secondary compression.Further, air injection enthalpy-increasing part is the air injection enthalpy-increasing pipe 6 with control valve 61, and wherein whether control valve 61 sprays refrigerant for controlling.Thus, by control valve 61 is set, whether can effectively controls to spraying in the gas after first compression and increase enthalpy refrigerant, and controlled coolant quantity processed.Alternatively, control valve 61 is one-way control valve 61, and further alternatively, control valve 61 is Unidirectional solenoid valve.
In further embodiment of the present invention, in lower bearing 28, limit exhaust cavity 281, exhaust cavity 281 communicates with the second cylinder 24 by second row gas port 242, and exhaust cavity 281 is connected with valve component.For example, in the example of Fig. 1-Fig. 4, exhaust cavity 281 is located at the below of the second compression chamber 243, and exhaust cavity 281 is connected with valve component by outlet pipe.Alternatively, be formed with the groove of bottom-open on lower bearing 28, lower bearing 28 bottom is provided with plate jointly to limit exhaust cavity 281 with lower bearing 28.
As Figure 1-Figure 4, rotary compressor 100 also comprises: gas-liquid separator 5, gas-liquid separator 5 is located on the path being connected with sucking pipe 3, thereby can be effectively by the material gas-liquid separation entering from sucking pipe 3.
In one embodiment of the invention, gas-liquid separator 5 is that one and a gas-liquid separator 5 are located between sucking pipe 3 and valve component.
When system compresses is smaller, rotary compressor 100 is worked under the first mode of operation, as shown in Figure 1, now four-way switching valve 31 is arranged on connection model one, one-way control valve 61 is in closed condition, thereby air injection enthalpy-increasing pipe 6 is closed, the first intakeport 211 of gas-liquid separator 5 and the first cylinder 21 is communicated with by four-way switching valve 31, and the second intakeport 241 of the second cylinder 24 is communicated with by four-way switching valve 31 with the second row gas port 242 of the second cylinder 24 simultaneously.Now the workflow of compressor is: the low-pressure gas that is Ps from the pressure of evaporation side successively after sucking pipe 3 and gas-liquid separator 5 the first intakeport 211 by four-way switching valve 31 and the first cylinder 21 enter in the first compression chamber 213 of the first cylinder 21, low-pressure gas is compressed by the first cylinder 21 and improves pressure and through first row gas port 212, enters closed shell 1 and discharge from the relief opening 4 of compressor to Pd, now the second intakeport 241 of the second cylinder 24 is communicated with second row gas port 242, the second cylinder 24 is in idling conditions, compressor carries out i.e. the first mode of operation of single stage compression operation.Now the second cylinder 24 is in idling conditions, and the second slide plate 25 is in halted state under arrestment mechanism 251 effects, and vicinity second rolling piston 26 one end of the second slide plate 25 is separated with the periphery of the second rolling piston 26, reduces the idle resistance of the second cylinder 24.
For example, when system compresses is larger (heating operation under low ambient temperature condition), now compressor switches to the second mode of operation, as shown in Figure 2.Now four-way switching valve 31 is arranged on connection model two, gas-liquid separator 5 is communicated with by four-way switching valve 31 with the second intakeport 241 of the second cylinder 24, and the second row gas port 242 of the second cylinder 24 and the second intakeport 241 of the first cylinder 21 are communicated with by four-way switching valve 31 simultaneously.Now the workflow of compressor is: the low-pressure gas that is Ps from evaporation side pressure successively after sucking pipe 3 and gas-liquid separator 5 the second intakeport 241 by four-way switching valve 31 and the second cylinder 24 enter in the second compression chamber 243 of the second cylinder 24, low-pressure gas is entered exhaust cavity 281 by second row gas port 242 by the second cylinder 24 compressions the preliminary pressure that improves to Pm, then this gas is through outlet pipe, after four-way switching valve 31, enter the first intakeport 211 of the first cylinder 21 and then enter in the first compression chamber 213 of the first cylinder 21, pressure is that the gas of Pm is compressed for the second time by the first cylinder 21 and the further pressure that improves enters closed shell 1 and discharges from the relief opening 4 of compressor through first row gas port 212 to Pd.Now controlling the Unidirectional solenoid valve of injection increasing enthalpy pipe opens, in gas after compressing to the first order, spray into and increase enthalpy refrigerant, thereby improve the displacement of second level compression and reduce the delivery temperature that the second level is compressed, compressor now increases i.e. the second mode of operation of enthalpy formula two stage compression.Compressor is under the second mode of operation, the second slide plate 25 forefront pressures of the second cylinder 24 are air-breathing low-pressure Ps or intermediate pressure Pm, rear end is exhaust high pressure Pd, under pressure difference effect, the second slide plate 25 can overcome the braking action of arrestment mechanism 251, and then its front end normally contacts with the second rolling piston 26 peripheries, the second cylinder 24 normal operations.It will be appreciated that, compressor, under the second mode of operation, can optionally cut out air injection enthalpy-increasing pipe 6 as required, does not now affect the operating mode of compressor.
Or alternatively, gas-liquid separator 5 is that one end of two and two gas-liquid separators 5 communicates with the first intakeport 211 and the second intakeport 241 respectively, and the other end of two gas-liquid separators 5 communicates with valve component respectively.Here, it should be noted that, two gas-liquid separators 5 can be installed four-way switching valve 31 after rotary compressor 100 has been manufactured again, and to facilitate on traditional compressor production line, produce compressor.
When system compresses is smaller, rotary compressor 100 is worked under the first mode of operation, as shown in Figure 3, now four-way switching valve 31 is arranged on connection model one, one-way control valve 61 is in closed condition, thereby air injection enthalpy-increasing pipe 6 is closed, sucking pipe 3 and the gas-liquid separator 5 being communicated with the first intakeport 211 of the first cylinder 21 are communicated with by four-way switching valve 31, and the second intakeport 241 of the second cylinder 24 is communicated with by four-way switching valve 31 with the second row gas port 242 of the second cylinder 24 simultaneously.Now the workflow of compressor is: the low-pressure gas that is Ps from evaporation side pressure passes through four-way switching valve 31 after sucking pipe 3, the gas-liquid separator 5 being communicated with the first intakeport 211 of the first cylinder 21 and the first intakeport 211 of the first cylinder 21 enter in the first compression chamber 213 of the first cylinder 21, low-pressure gas is compressed by the first cylinder 21 and improves pressure and through first row gas port 212, enters closed shell 1 and discharge from the relief opening 4 of compressor to Pd, now the second intakeport 241 of the second cylinder 24 and the gas-liquid separator 5 that is communicated with the second intakeport 241 of the second cylinder 24 are communicated with second row gas port 242, the second cylinder 24 is in idling conditions, compressor carries out i.e. the first mode of operation of single stage compression operation.
When system compresses is larger, now compressor switches to the second mode of operation, as shown in Figure 4.Now four-way switching valve 31 is arranged on connection model two, sucking pipe 3 and the gas-liquid separator 5 being communicated with the second intakeport 241 of the second cylinder 24 are communicated with by four-way switching valve 31, and the second row gas port 242 of the second cylinder 24 and the second intakeport 241 of the first cylinder 21 are communicated with by four-way switching valve 31 simultaneously.Now the workflow of compressor is: the low-pressure gas that is Ps from evaporation side pressure passes through four-way switching valve 31 after sucking pipe 3, the gas-liquid separator 5 being communicated with the second intakeport 241 of the second cylinder 24 and the second intakeport 241 of the second cylinder 24 enter in the second compression chamber 243 of the second cylinder 24, low-pressure gas is entered exhaust cavity 281 through second row gas port 242 by the second cylinder 24 compressions the preliminary pressure that improves to Pm, the gas that then pressure is Pm is through outlet pipe, after four-way switching valve 31, enter the first intakeport 211 of the gas-liquid separator 5 that is communicated with the first intakeport 211 of the first cylinder 21 and the first cylinder 21 and then enter in the first compression chamber 213 of the first cylinder 21, then gas is compressed for the second time by the first cylinder 21 and further improves pressure and through first row gas port 212, enters closed shell 1 and discharge from the relief opening 4 of compressor to Pd.It will be appreciated that, the Unidirectional solenoid valve that now control to spray increases enthalpy pipe is optionally opened in the gas that to take to pressure after first order compression be Pm and is sprayed into and increase enthalpy refrigerant, improve the displacement of second level compression and reduce the delivery temperature that the second level is compressed, compressor now increases i.e. the second mode of operation of enthalpy formula two stage compression.
According to other formations of the rotary compressor 100 of the embodiment of the present invention and operation, be all known to those skilled in the art, be not described in detail here.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiments or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiments, scope of the present invention is limited by claim and equivalent thereof.

Claims (14)

1. a rotary compressor, is characterized in that, comprising:
Housing;
Compression set, described compression set is located in described housing and comprises the first compression set and the second compression set, in described the first compression set and described the second compression set, limit respectively the first compression chamber and the second compression chamber, in described the first compression chamber and described the second compression chamber, be formed with respectively the first intakeport and first row gas port, the second intakeport and second row gas port, the volume of wherein said the second compression chamber is greater than the volume of described the first compression chamber;
Sucking pipe, described sucking pipe by valve component respectively with described the first intakeport, described the second intakeport and described second row gas port communicate, wherein under the first mode of operation described sucking pipe and described the first intakeport pass to mutually the gas entering from described sucking pipe is carried out to first compression and described the second intakeport communicate with described second row gas port so that described the second compression set in idling conditions, under the second mode of operation, described sucking pipe and described the second intakeport pass to mutually and the gas entering from described sucking pipe is carried out to first compression and described second row gas port and described the first intakeport pass to mutually the gas recompression first compression, and
Relief opening, described relief opening is located on described housing to discharge the gas after compression.
2. rotary compressor according to claim 1, it is characterized in that, in described the first compression chamber and described the second compression chamber, be formed with respectively for holding the first vane slot and second vane slot of the first slide plate and the second slide plate, wherein said the first slide plate and described the second slide plate are located at respectively in described the first vane slot and described the second vane slot movably.
3. rotary compressor according to claim 2, is characterized in that, further comprises:
Arrestment mechanism, described arrestment mechanism is located at one end of described the second slide plate, and described arrestment mechanism is formed at described arrestment mechanism under described the first mode of operation and brakes described the second slide plate so that it is contained in described the second vane slot.
4. rotary compressor according to claim 3, is characterized in that, described arrestment mechanism is the elastic component that is connected to one end of described the second slide plate, and described elastic component often pulls to the other end of described the second slide plate in described the second vane slot.
5. rotary compressor according to claim 3, is characterized in that, described the first slide plate is located in described the first vane slot movably by spring,
Described the second slide plate is located in described the second vane slot movably by driving force, described the second vane slot is communicated with described housing away from one end of described the second compression chamber, wherein said driving force is produced by the pressure difference between described the second intakeport and described housing, under described the second mode of operation, the braking force that described arrestment mechanism acts on described the second slide plate is less than described driving force.
6. rotary compressor according to claim 5, is characterized in that, described braking force is less than the described driving force that described pressure difference is 0.1~0.5MPa.
7. rotary compressor according to claim 6, is characterized in that, described braking force is less than the described driving force that described pressure difference is roughly 0.3MPa.
8. rotary compressor according to claim 1, is characterized in that, also comprises:
Gas-liquid separator, described gas-liquid separator is located on the path being connected with described sucking pipe.
9. rotary compressor according to claim 8, is characterized in that, described gas-liquid separator is that one and a described gas-liquid separator are located between described sucking pipe and described valve component.
10. rotary compressor according to claim 8, it is characterized in that, described gas-liquid separator is that one end of two and described two gas-liquid separators communicates with described the first intakeport and described the second intakeport respectively, and the other end of described two gas-liquid separators communicates with described valve component respectively.
11. rotary compressors according to claim 1, is characterized in that, described second row gas port is provided with air injection enthalpy-increasing part with the path that described the first intakeport is connected.
12. rotary compressors according to claim 11, is characterized in that, described air injection enthalpy-increasing part is the air injection enthalpy-increasing pipe with control valve, and whether wherein said control valve sprays refrigerant for controlling.
13. rotary compressors according to claim 12, is characterized in that, described control valve is one-way control valve.
14. according to the rotary compressor described in any one in claim 1-13, it is characterized in that, described valve component is four-way switching valve.
CN201310121785.3A 2013-04-09 2013-04-09 Rotary compressor Pending CN103511266A (en)

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Application publication date: 20140115