CN105444474B - Refrigerating circulatory device - Google Patents
Refrigerating circulatory device Download PDFInfo
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- CN105444474B CN105444474B CN201410392683.XA CN201410392683A CN105444474B CN 105444474 B CN105444474 B CN 105444474B CN 201410392683 A CN201410392683 A CN 201410392683A CN 105444474 B CN105444474 B CN 105444474B
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Abstract
The present invention provides a kind of refrigerating circulatory device, rotary compressor including being in turn connected to form refrigeration cycle, First Heat Exchanger, first throttle mechanism and the second heat exchanger, rotary compressor includes at least two groups of low pressure (LP) cylinders and at least one set of high pressure cylinder, low pressure (LP) cylinder is as first order compression cylinder, high pressure cylinder is as second level compression cylinder, one of which low pressure (LP) cylinder at least two groups of low pressure (LP) cylinders sets pressure switching mechanism, pressure switching mechanism includes switch member, switch member guides the low pressure refrigerant of refrigerating circulatory device or high pressure refrigerant with switching to the control chamber for being arranged at slide plate back-surface side；Pressure switching mechanism also includes slide plate limit element, and the back pressure chamber of slide plate limit element lower end connects with low pressure refrigerant all the time.The refrigerating circulatory device of the present invention, by a certain low pressure (LP) cylinder, to realize that the efficiency of refrigerating circulatory device is lifted, different displacements and different discharge capacity ratios of just arbitrarily downgrading are selected according to air conditioning comfortableness demand for smooth switching between uncompressed operating and normally compression operation.
Description
Technical field
The present invention relates to refrigerating field, more particularly to a kind of refrigerating circulatory device.
Background technology
The transfiguration technology commonly used in rotation hermetic type compressor field is that the double cylinders of ordinary single-stage or ordinary single-stage is more
Cylinder configuration is into the uncompressed operating that some compression mechanism is performed in underload, to realize that low performance operates, so as to carry
The efficiency of high compressor and its cooling cycle system, but the existing kind of refrigeration cycle that hermetic type compressor is rotated using transfiguration fills
Put, system energy efficiency lifting applicable working condition scope is small, and can not effectively lift the heating capacity and low temperature system under low-temperature heating operating mode
System energy efficiency under thermal condition.
The content of the invention
In view of the present situation of prior art, it is an object of the invention to provide a kind of refrigerating circulatory device, passes through a certain low pressure
Cylinder smooth switching between uncompressed operating normal compression operation is under common air-conditioning operating mode to realize refrigerating circulatory device
Efficiency of uniting lifting.To achieve the above object, technical scheme is as follows：
A kind of refrigerating circulatory device, including it is in turn connected to form the rotary compressor of refrigeration cycle, the first heat exchange
Device, first throttle mechanism and the second heat exchanger, the rotary compressor include at least two groups of low pressure (LP) cylinders and at least one set of high pressure
Cylinder, the low pressure (LP) cylinder is as first order compression cylinder, and the high pressure cylinder is as second level compression cylinder, at least two groups of low pressure (LP) cylinders
One of which described in low pressure (LP) cylinder be provided with pressure switching mechanism, the pressure switching mechanism includes switch member, the switch member
The low pressure refrigerant of the refrigerating circulatory device or high pressure refrigerant are guided with switching to the control chamber for being arranged at slide plate back-surface side；
The pressure switching mechanism also includes being used for the slide plate limit element spacing to slide plate, the back pressure of the slide plate limit element lower end
Room connects with the low pressure refrigerant all the time.
In one of the embodiments, the pressure switching mechanism, which has, establishes the control chamber and kind of refrigeration cycle dress
Connected between the first pipeline and the control chamber and the low-pressure side of the refrigerating circulatory device that are connected between the high-pressure side put
The second pipeline, be provided with the switch member on first pipeline and second pipeline.
In one of the embodiments, the switch member includes the first electronic valve and the second electronic valve, described
First electronic valve is set on one pipeline, second electronic valve is provided with second pipeline.
In one of the embodiments, the switch member is triple valve, and the first valve port of the triple valve connects the rotation
The blast pipe of rotary compressor, the second valve port of the triple valve connect the control chamber, and the 3rd valve port of the triple valve connects
Lead to the suction end of the low pressure (LP) cylinder.
In one of the embodiments, the switch member is the first four-way valve, and the first valve port of first four-way valve connects
The blast pipe of the logical rotary compressor, the second sealing valve port of first four-way valve, the 3rd of first four-way valve the
Valve port connects the suction end of the low pressure (LP) cylinder, and the 4th valve port of first four-way valve connects the control chamber.
In one of the embodiments, the refrigerating circulatory device also includes the second four-way valve and second throttle body, institute
The first valve port for stating the second four-way valve connects the blast pipe of the rotary compressor, and the second valve port of second four-way valve connects
Logical First Heat Exchanger, the 3rd valve port of second four-way valve connect the suction end of the low pressure (LP) cylinder, second four-way valve
4th valve port connects second heat exchanger, and second heat exchanger is sequentially connected in series the second throttle body and connected with economizer
To the first throttle mechanism.
In one of the embodiments, the refrigerating circulatory device also includes knockout, and the knockout is connected on described
Between the suction end of second heat exchanger and the low pressure (LP) cylinder.
In one of the embodiments, series hybrid between the exhaust end of the suction end of the high pressure cylinder and the low pressure (LP) cylinder
Device, economizer of being connected between the first throttle mechanism and second heat exchanger, the economizer connect with the blender.
In one of the embodiments, the slide plate limit element includes being used for the pin coordinated with the slide plate, described
One end of pin sets elastomeric element, and the back pressure chamber of the lower end of the pin keeps connecting with the low pressure refrigerant all the time.
In one of the embodiments, the compressor has full load pattern and sub-load pattern, described complete negative
Under lotus pattern, first electronic valve is opened, and second electronic valve is closed, and is provided with the institute of the pressure switching mechanism
State low pressure cylinder working；Under the sub-load pattern, first electronic valve is closed, and second electronic valve is opened,
The low pressure (LP) cylinder for being provided with the pressure switching mechanism is stopped.
In one of the embodiments, the compressor has full load pattern and sub-load pattern, described complete negative
Under lotus pattern, the first valve port of the triple valve connects with the second valve port of the triple valve, is provided with the pressure switching machine
The low pressure cylinder working of structure；Under the sub-load pattern, the second valve port and the triple valve the 3rd of the triple valve
Valve port connects, and the low pressure (LP) cylinder for being provided with the pressure switching mechanism is stopped.
In one of the embodiments, the compressor has full load pattern and sub-load pattern, described complete negative
Under lotus pattern, the first valve port of first four-way valve connects with the 4th valve port of first four-way valve, is provided with the pressure
The low pressure cylinder working of power switching mechanism；Under the sub-load pattern, the 3rd valve port of first four-way valve and institute
The 4th valve port connection of the first four-way valve is stated, the low pressure (LP) cylinder for being provided with the pressure switching mechanism is stopped.
The beneficial effects of the invention are as follows：
The refrigerating circulatory device of the present invention, cut by the way that a certain low pressure (LP) cylinder is smooth between uncompressed operating and normal compression operation
Change to realize that system energy efficiency of the refrigerating circulatory device under common air-conditioning operating mode is lifted, selected according to air conditioning comfortableness demand different
Discharge capacity and different discharge capacity ratios of just arbitrarily downgrading.By selecting small displacement and larger displacement in the case of common air-conditioning freezes underload
Than to provide the running efficiency of superelevation；Under ultra-low temperature surroundings by select huge discharge and relatively low height arbitrarily downgrade discharge capacity ratio with
Sufficient heating capacity and higher running efficiency are just provided, improve heating capacity and efficiency under low-temperature heating operating mode.Greatly
Widen rotary closed compressor operating scope and effectively improve the running efficiency under each working range.
Brief description of the drawings
Fig. 1 is the structural representation of the refrigerating circulatory device embodiment one of the present invention；
Fig. 2 is the longitudinal sectional view of rotary compressor shown in Fig. 1；
Fig. 3 is the pump assembly longitudinal sectional view of rotary compressor shown in Fig. 1；
Fig. 4 is the structural representation of the refrigerating circulatory device embodiment two of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with drawings and Examples pair
The refrigerating circulatory device of the present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used for
The present invention is explained, is not intended to limit the present invention.
The refrigerating circulatory device of one embodiment of the invention includes the rotary compression for being in turn connected to form refrigeration cycle
Machine, First Heat Exchanger, first throttle mechanism and the second heat exchanger, rotary compressor include at least two groups of low pressure (LP) cylinders and at least one
Group high pressure cylinder, low pressure (LP) cylinder is as first order compression cylinder, and high pressure cylinder is as second level compression cylinder, the suction end and low pressure (LP) cylinder of high pressure cylinder
Exhaust end between inline mixer, connected between first throttle mechanism and the second heat exchanger economizer, economizer and blender
Connection；One of which low pressure (LP) cylinder at least two groups of low pressure (LP) cylinders is provided with pressure switching mechanism, the pressure switching mechanism
Including switch member, the switch member by the low pressure refrigerant of refrigerating circulatory device or high pressure refrigerant switch to being arranged at table after slide plate
The control chamber guiding of surface side；The pressure switching mechanism also includes being used for the slide plate limit element spacing to slide plate, the slide plate
The back pressure chamber of limit element lower end connects with the low pressure refrigerant all the time.Wherein, the slide plate limit element includes being used for and institute
State the pin of slide plate cooperation, one end of the pin sets elastomeric element, the back pressure chamber of the lower end of the pin all the time with it is described
Low pressure refrigerant keeps connection.
Embodiment one
Referring to figs. 1 to Fig. 3, to the system of invention by taking the rotary compressor with a high pressure cylinder and two low pressure (LP) cylinders as an example
SAPMAC method device illustrates, compressor include hiigh pressure stage blast pipe 1, seal casinghousing 2, motor stator 3, motor rotor 4,
Bent axle 5, upper flange 6, high pressure cylinder 7, upper spacer 8, median septum 9, the second low pressure (LP) cylinder 10, high pressure cylinder roller 11, the rolling of the second low pressure (LP) cylinder
Sub 12, second low pressure (LP) cylinder slide plate 13, lower clapboard 14, the first low pressure (LP) cylinder 15, the first low pressure (LP) cylinder roller 16, the first low pressure (LP) cylinder slide plate
17th, pin 18, spring 19, lower flange 20, lower flange cover plate 21, the first screw 22, the second screw 23.
Wherein, air intake duct of first air intake duct 28 as the first low pressure (LP) cylinder 15, the second air intake duct 27 are used as the second low pressure (LP) cylinder
10 air intake duct, air intake duct of the 3rd air intake duct 24 as high pressure cylinder 7, low-pressure stage blast pipe 25 is as the first low pressure (LP) cylinder 15 and the
The blast pipe of two low pressure (LP) cylinders 10, the exhaust of the first low pressure (LP) cylinder 15 and the second low pressure (LP) cylinder 10 is discharged from low-pressure stage blast pipe 25 to be sealed
Housing 2, the exhaust of high pressure cylinder 7 finally discharge seal casinghousing 2 from hiigh pressure stage blast pipe 1.Air inlet pipe 26 connects the first low pressure (LP) cylinder and slided
The control chamber 31 of the back-surface side of piece 13, control terminal of the air inlet pipe 26 as the first low pressure (LP) cylinder 15.
The back pressure chamber 40 of the lower end of pin 18 connects the low pressure refrigerant of refrigerating circulatory device by inlet channel 29, wherein, the back of the body
Pressure chamber 40 can connect the first air intake duct 28 and/or the second air intake duct 27, i.e. back pressure chamber 40 is low with the first low pressure (LP) cylinder 15 and/or second
The suction end connection of cylinder pressure 10.In figure inlet channel 29 actually can by be built in the first low pressure (LP) cylinder 15, lower flange 20 through hole with
The runner composition being built on lower flange cover plate 21.
In refrigerating circulatory device, the hiigh pressure stage blast pipe 1 of rotary compressor connects the first valve port A1 of four-way valve 31, and four
The second valve port B1 connection First Heat Exchangers 32 (outdoor heat exchanger) of port valve 31, the 3rd valve port C1 series connection liquid separations of four-way valve 31
Device 30 connects the suction end of the first low pressure (LP) cylinder 15 and the second low pressure (LP) cylinder 10, and the 4th valve port D1 of four-way valve 31 connects the second heat exchanger
39 (indoor heat exchangers), the low-pressure stage blast pipe 25 of rotary compressor connect blender 36, and the 3rd air intake duct 24 also connects
To blender 36, economizer 34 and second throttle body 38 are sequentially connected in series between the heat exchanger 39 of first throttle mechanism 33 and second,
Economizer 34 also connects with blender 36.The exhaust of first low pressure (LP) cylinder 15 and the second low pressure (LP) cylinder 10 enters mixed through low-pressure stage blast pipe
Clutch 36, the part refrigerant in economizer 34 enter blender 36 and are used as increasing enthalpy refrigerant and the first low pressure (LP) cylinder 15 and the second low pressure (LP) cylinder
10 exhaust is mixed in blender 36, and mixed refrigerant enters in high pressure cylinder 7 through the 3rd air intake duct 24 to be compressed.
Pressure switching mechanism is with first connected between the high-pressure side for establishing control chamber 31 and the refrigerating circulatory device
The second pipeline 43 connected between pipeline 42 and control chamber 31 and the low-pressure side of the refrigerating circulatory device.In figure, the first pipe
Road 42 is connected between hiigh pressure stage blast pipe 1 and air inlet pipe 26, and the second pipeline 43 is connected between knockout 30 and air inlet pipe 26.
First pipeline 42 and the second pipeline 43 are provided with switch member, switch member includes the first electronic valve 35 and the second electronic valve
37, first electronic valve 35 in the setting of the first pipeline 42, the second electronic valve 37 is provided with the second pipeline 43.First electricity
The sub- electronic valve 37 of valve 35 and second is magnetic valve or motor-driven valve.
First low pressure (LP) cylinder 15 is provided with pressure switching mechanism, the opening and second that control chamber 31 passes through the first electronic valve 35
The closing of electronic valve 37, realize high pressure refrigerant by connect and guide with control chamber 31 high pressure refrigerant keep high pressure conditions, or
Person's control chamber 31 by the first electronic valve 35 closing and the second electronic valve 37 opening, realize low pressure refrigerant by with control
Chamber 31 processed is connected and guides low pressure refrigerant to keep low-pressure state, and back pressure chamber 40 is kept by inlet channel 29 and low pressure refrigerant all the time
Connect to keep low-pressure state.
Refrigerating circulatory device during full load steady running, normally pressed by the second low pressure (LP) cylinder 10 and high pressure cylinder 7
Contracting work.The first low pressure (LP) cylinder 15 with pressure switching mechanism also carries out normal compression work.Referring to Fig. 1, the first electronic valve
Door 35 is opened all the time, and the second electronic valve 37 is closed all the time, and the high-pressure side of control chamber 31 and refrigerating circulatory device is by the first electricity
Sub- valve 35 is connected by air inlet pipe 26 to keep high pressure conditions, and back pressure chamber 40 continues and the low-pressure side of refrigerating circulatory device
Connection, remains low-pressure state.Now the stress of pin 18 has:Downward high side pressure is born on pin top, and itself is downward
Gravity, upward low-pressure lateral pressure is born in bottom and four kinds of component such as upward spring lift are born in bottom, and pin by
Making a concerted effort for arriving is downward, and now pin 18 is stably held in pin hole, and the back-surface side stress of the first low pressure (LP) cylinder slide plate 17 is high pressure,
Front-surface side stress is low-voltage and medium voltage, and it is low to be brought into close contact first all the time for the head of the first low pressure (LP) cylinder slide plate 17 in the presence of pressure difference
Cylinder pressure roller 16, the first low pressure (LP) cylinder 15 is divided for two parts cavity, so as to which the first low pressure (LP) cylinder 15 realizes normal compression operation.
Refrigerating circulatory device is switched in sub-load operation process by full load operation, the second low-pressure cylinder 10 and high pressure
Cylinder 7 carries out normal compression work, and first low pressure (LP) cylinder 15 with pressure switching mechanism is switched to stopping by normal compression operation
Compression operation state.First electronic valve 35 is switched to closing by opening, and the second electronic valve 37 is first switched to opening by closing,
And then closing is switched to by opening, by the closing of the first electronic valve 35, the high pressure of control chamber 31 and refrigerating circulatory device
Side disconnects, and followed by the of short duration opening of the second electronic valve 37, control chamber 31 connects with the low-pressure side of refrigerating circulatory device,
This process is undergone so that a small amount of high pressure refrigerant in control chamber 31 carries out pressure release to the low-pressure side of refrigerating circulatory device and built rapidly
The pressure consistent with the low-pressure side of refrigerating circulatory device is found, then the second electronic valve 37 is closed, cutting-off controlling chamber 31 and refrigeration
The low-pressure side connection of EGR, control chamber 31 keep low-pressure state ever since.And back pressure chamber 40 continues and kind of refrigeration cycle dress
The low-pressure side connection put, remains low-pressure state.Now the stress of pin 18 has:Bear downward low-pressure side refrigerant in pin top
Pressure, itself downward gravity, upward low-pressure side refrigerant pressure is born in bottom and the upward bullet of spring 19 is born in bottom
Four kinds of component such as power, and making a concerted effort that pin 18 is subject to is upward, pin 18 moves from bottom to top to be slided hence into the first low pressure (LP) cylinder
In the hole position of the lower end side of piece 17, the first low pressure (LP) cylinder slide plate 17 can not be moved back and forth by pin 18 is locked, and the first low pressure (LP) cylinder is slided
Piece 17 is separated from the first low pressure (LP) cylinder roller 16, so as to which the first low pressure (LP) cylinder 15 realizes uncompressed operating.
During sub-load steady running, the second low pressure (LP) cylinder 10 and high pressure cylinder 7 are carried out normally refrigerating circulatory device
Compression work, first low pressure (LP) cylinder 15 with pressure switching mechanism stop compression operation.Referring to Fig. 1, the first electronic valve 35 begins
To close eventually, the second electronic valve 37 is closed all the time, by the closing of the first electronic valve 35, control chamber 31 and refrigerating circulatory device
High-pressure side disconnect, the second electronic valve 37 close cause control chamber 31 keep original low-pressure state.And back pressure chamber 30 continues
Connected with the low-pressure side of refrigerating circulatory device, remain low-pressure state.Now the stress of pin 18 has:Bear downwards on pin top
Low-pressure side refrigerant pressure, itself downward gravity, upward low-pressure side refrigerant pressure is born in bottom and spring is born in bottom
Four kinds of component such as 19 upward elastic force, and making a concerted effort that pin 18 is subject to is upward, pin 18 will withstand on the first low pressure (LP) cylinder slide plate always
In the hole position of 17 lower end sides, the first low pressure (LP) cylinder slide plate 17 can not be moved back and forth by pin 18 is locked, the first low pressure (LP) cylinder slide plate
17 and first low pressure (LP) cylinder roller 16 be separated from and the first low pressure (LP) cylinder 15 is realized uncompressed operating, i.e., now the first low pressure (LP) cylinder 15 is not
Work.
During refrigerating circulatory device is switched to full load operation by sub-load operating, the second low pressure (LP) cylinder 10 and high pressure cylinder
7 carry out normal compression work, and first low pressure (LP) cylinder 15 with pressure switching mechanism is turned to be switched to by stopping compression operation state
Compression operation state.Referring to Fig. 1, the first electronic valve 15 is switched to opening by closing, and the second electronic valve 37 is closed all the time, control
Chamber 31 processed is connected with the high-pressure side of refrigerating circulatory device by the first electronic valve 35 to keep high pressure conditions, and back pressure chamber 40
Continue to connect with the low-pressure side of refrigerating circulatory device, remain low-pressure state.Now the stress of pin 18 has:Bear on pin top
Downward high-pressure side refrigerant pressure, itself downward gravity, upward low-pressure side refrigerant pressure is born in bottom and bottom is born
Four kinds of component such as upward elastic force of spring 19, and making a concerted effort that pin 18 is subject to is downward, now pin 18 is stably held in back pressure
In room 40, now the back-surface side stress of the first low pressure (LP) cylinder slide plate 17 is high pressure, and front-surface side stress is low-voltage and medium voltage, in pressure difference
In the presence of the front-surface side of the first low pressure (LP) cylinder slide plate 17 be brought into close contact the first low pressure (LP) cylinder roller 16, the first low pressure (LP) cylinder slide plate 17 all the time
First low pressure (LP) cylinder 15 is divided for two parts cavity, the first low pressure (LP) cylinder 15 is so as to realizing stable normal compression operation.
Embodiment two
The main distinction of embodiment two and embodiment one is in the first electronic valve in embodiment one is replaced using triple valve
Door and the second electronic valve, the hiigh pressure stage blast pipe of the first valve port connection rotary compressor of triple valve, the second of triple valve
Valve port connects control chamber, the low-pressure side of the 3rd valve port connection refrigerating circulatory device of triple valve.
Referring to Fig. 2 to Fig. 4, the first valve port A2 connection hiigh pressure stages blast pipe 1 of triple valve 41, the valve port B2 of triple valve 41 second
Connect air inlet pipe 26, the 3rd valve port C2 of triple valve 41 connects the low-pressure side of the refrigerating circulatory device, triple valve 41 in figure
3rd valve port C2 connects knockout 30.Connection between high-pressure side refrigerant and control chamber 31 is turned on by triple valve 41 so that control
Chamber 31 processed keeps high pressure conditions.Or the connection between low-pressure side and control chamber 31 is turned on by triple valve 41, realize control chamber
31 keep low-pressure state.
During full load steady running, the second low pressure (LP) cylinder 10 and hiigh pressure stage cylinder 7 are carried out normally refrigerating circulatory device
Compression work, have pressure switching mechanism the second low pressure (LP) cylinder 15 also carry out normal compression work.Referring to Fig. 4, pass through three
Second valve port B2 of the valve port A2 of port valve 41 first and triple valve 41 is turned on, and realizes the connection of high pressure refrigerant and control chamber 31, and draw
Leading high pressure refrigerant makes control chamber 31 keep high pressure conditions, and back pressure chamber 40 continues to connect with the low-pressure side of refrigerating circulatory device, carries on the back
Pressure chamber 40 remains low-pressure state, and now the stress of pin 18 has:Downward high side pressure is born on pin top, and itself is downward
Gravity, upward low-pressure lateral pressure is born in bottom and four kinds of component such as upward spring lift are born in bottom, and pin 18
Making a concerted effort for being subject to is downward, and now pin 18 is stably held in pin hole, and the back-surface side stress of the first low pressure (LP) cylinder slide plate 17 is height
Pressure, front-surface side stress is low-voltage and medium voltage, and the head of the first low pressure (LP) cylinder slide plate 17 is brought into close contact all the time in the presence of pressure difference
One low pressure (LP) cylinder roller 16, the first low pressure (LP) cylinder 15 is divided for two parts cavity, so as to which the first low pressure (LP) cylinder 15 realizes normal compression operation.
During sub-load steady running, the second low pressure (LP) cylinder 10 and hiigh pressure stage cylinder 7 are carried out just refrigerating circulatory device
Normal compression work, first low pressure (LP) cylinder 15 with pressure switching stop compression operation.Second valve port B2 of triple valve 41 and three
The 3rd valve port C2 conductings of port valve 41, realize low pressure refrigerant by the connection with control chamber 31, and guide low pressure refrigerant so that controlling
Chamber 31 processed keeps low-pressure state, and back pressure chamber 40 continues to connect with the low-pressure side of refrigerating circulatory device, remains low-pressure state.
Now the stress of pin 18 has:Downward low-pressure side refrigerant pressure is born on pin top, and itself downward gravity, bottom is born upwards
Low-pressure side refrigerant pressure and bottom bear four kinds of component such as upward elastic force of spring 19, and pin 18 is subject to make a concerted effort to
On, pin 18 will be withstood in the hole position of the lower end side of the first low pressure (LP) cylinder slide plate 17 always, and the first low pressure (LP) cylinder slide plate 17 is locked by pin 18
Stubbornly refuse to move back and forth, the first low pressure (LP) cylinder slide plate 17 is separated from the first low pressure roller 16, so as to which the first low pressure (LP) cylinder 15 is real
Existing uncompressed operating, i.e. the first low pressure (LP) cylinder 15 are now stopped.
Triple valve 41 in the present embodiment can also use four-way valve to replace, and one of sealing valve port of four-way valve is other
Three valve ports are connected respectively hiigh pressure stage blast pipe 1, air inlet pipe 26 and knockout 30, can equally realize the work(of triple valve 41
Energy.
The refrigerating circulatory device of various embodiments above, by a certain low pressure (LP) cylinder between uncompressed operating and normal compression operation
Smooth switching is selected with realizing that system energy efficiency of the refrigerating circulatory device under common air-conditioning operating mode is lifted according to air conditioning comfortableness demand
Select different displacements and different discharge capacity ratios of just arbitrarily downgrading.Common air-conditioning freeze underload in the case of by select small displacement and compared with
Huge discharge is than to provide the running efficiency of superelevation；By selecting huge discharge and relatively low height is arbitrarily downgraded row under ultra-low temperature surroundings
Amount is than to provide sufficient heating capacity and higher running efficiency, improving heating capacity and energy under low-temperature heating operating mode
Effect.It is greatly broadened rotary closed compressor operating scope and effectively improves the running efficiency under each working range.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (12)
- A kind of 1. refrigerating circulatory device, it is characterised in that：Rotary compressor, First Heat Exchanger, first throttle mechanism and second including being in turn connected to form refrigeration cycle Heat exchanger, the rotary compressor include at least two groups of low pressure (LP) cylinders and at least one set of high pressure cylinder, and the low pressure (LP) cylinder is as first Level compression cylinder, the high pressure cylinder is as second level compression cylinder, low pressure (LP) cylinder described in the one of which at least two groups of low pressure (LP) cylinders It is provided with pressure switching mechanism, the pressure switching mechanism includes switch member, and the switch member is by the refrigerating circulatory device Low pressure refrigerant or high pressure refrigerant switching ground guide to the control chamber for being arranged at slide plate back-surface side；The pressure switching mechanism also wraps Include for the slide plate limit element spacing to slide plate, the back pressure chamber of the slide plate limit element lower end all the time with the low pressure refrigerant Connection.
- 2. refrigerating circulatory device according to claim 1, it is characterised in that：The pressure switching mechanism has for establishing between the high-pressure side of the control chamber and the refrigerating circulatory device and connecting The second pipeline connected between one pipeline and the control chamber and the low-pressure side of the refrigerating circulatory device, in the described first pipe The switch member is provided with road and second pipeline.
- 3. refrigerating circulatory device according to claim 2, it is characterised in that：The switch member includes the first electronic valve and the second electronic valve, and first electronics is set on first pipeline Valve, second electronic valve is provided with second pipeline.
- 4. refrigerating circulatory device according to claim 2, it is characterised in that：The switch member is triple valve, and the first valve port of the triple valve connects the blast pipe of the rotary compressor, described Second valve port of triple valve connects the control chamber, and the 3rd valve port of the triple valve connects the suction end of the low pressure (LP) cylinder.
- 5. refrigerating circulatory device according to claim 2, it is characterised in that：The switch member is the first four-way valve, and the first valve port of first four-way valve connects the exhaust of the rotary compressor Pipe, the second sealing valve port of first four-way valve, the 3rd valve port of first four-way valve connect the air-breathing of the low pressure (LP) cylinder End, the 4th valve port of first four-way valve connect the control chamber.
- 6. according to the refrigerating circulatory device described in claim any one of 1-5, it is characterised in that：Also include the second four-way valve and second throttle body, the first valve port of second four-way valve connects the rotary compression The blast pipe of machine, the second valve port connection First Heat Exchanger of second four-way valve, the 3rd valve port of second four-way valve connect Lead to the suction end of the low pressure (LP) cylinder, the 4th valve port of second four-way valve connects second heat exchanger, second heat exchange Device is sequentially connected in series the second throttle body and economizer is connected to the first throttle mechanism.
- 7. according to the refrigerating circulatory device described in claim any one of 1-5, it is characterised in thatAlso include knockout, the knockout is connected between second heat exchanger and the suction end of the low pressure (LP) cylinder.
- 8. according to the refrigerating circulatory device described in claim any one of 1-5, it is characterised in that：Inline mixer between the exhaust end of the suction end of the high pressure cylinder and the low pressure (LP) cylinder, the first throttle mechanism and institute Economizer of connecting between the second heat exchanger is stated, the economizer connects with the blender.
- 9. according to the refrigerating circulatory device described in claim any one of 1-5, it is characterised in that：The slide plate limit element includes being used for the pin coordinated with the slide plate, and one end of the pin sets elastomeric element, The back pressure chamber of the lower end of the pin keeps connecting with the low pressure refrigerant all the time.
- 10. refrigerating circulatory device according to claim 3, it is characterised in that：The compressor has full load pattern and sub-load pattern, under the full load pattern, first electronic valve Door is opened, and second electronic valve is closed, and is provided with the low pressure cylinder working of the pressure switching mechanism；In the part Under load pattern, first electronic valve is closed, and second electronic valve is opened, and is provided with the pressure switching mechanism The low pressure (LP) cylinder is stopped.
- 11. refrigerating circulatory device according to claim 4, it is characterised in that：The compressor has full load pattern and sub-load pattern, under the full load pattern, the of the triple valve One valve port connects with the second valve port of the triple valve, is provided with the low pressure cylinder working of the pressure switching mechanism；Institute State under sub-load pattern, the second valve port of the triple valve connects with the valve port of triple valve the 3rd, is provided with the pressure The low pressure (LP) cylinder of switching mechanism is stopped.
- 12. refrigerating circulatory device according to claim 5, it is characterised in that：The compressor has full load pattern and sub-load pattern, under the full load pattern, first four-way valve The first valve port connected with the 4th valve port of first four-way valve, be provided with the low pressure (LP) cylinder work of the pressure switching mechanism Make；Under the sub-load pattern, the 3rd valve port of first four-way valve and the 4th valve port of first four-way valve connect Logical, the low pressure (LP) cylinder for being provided with the pressure switching mechanism is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410392683.XA CN105444474B (en) | 2014-07-30 | 2014-07-30 | Refrigerating circulatory device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410392683.XA CN105444474B (en) | 2014-07-30 | 2014-07-30 | Refrigerating circulatory device |
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| CN106152342B (en) * | 2016-07-04 | 2020-12-04 | 珠海格力电器股份有限公司 | Variable-displacement-ratio two-stage compression air conditioning system and control method thereof |
| CN106369863B (en) * | 2016-10-26 | 2022-01-04 | 广东美芝制冷设备有限公司 | Refrigerating device |
| CN106705475B (en) * | 2016-11-30 | 2019-06-14 | 广东美芝制冷设备有限公司 | The control method of refrigeration system and refrigeration system |
| CN107917078B (en) | 2017-11-08 | 2024-03-29 | 珠海格力节能环保制冷技术研究中心有限公司 | Variable capacity control structure, compressor and variable capacity control method thereof |
| CN107816816B (en) * | 2017-11-24 | 2023-05-26 | 安徽美芝精密制造有限公司 | Refrigerating device |
| CN112013475A (en) * | 2019-05-30 | 2020-12-01 | 广东美的制冷设备有限公司 | Air conditioner and control method thereof |
| CN112013474A (en) * | 2019-05-30 | 2020-12-01 | 广东美的制冷设备有限公司 | Air conditioner and control method thereof |
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Effective date of registration: 20181213 Address after: 519070 golden hill road, Qianshan, Zhuhai, Guangdong Co-patentee after: Zhuhai Gree Energy Saving & Refrigerating Technology Resarch Center Co., Ltd. Patentee after: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI Address before: 519070 Science and Technology Building No. 789 Jinji Road, Qianshan, Zhuhai City, Guangdong Province Patentee before: Zhuhai Gree Energy Saving & Refrigerating Technology Resarch Center Co., Ltd. |
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