CN105508246A - Rolling rotor type twin-stage compressor - Google Patents
Rolling rotor type twin-stage compressor Download PDFInfo
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- CN105508246A CN105508246A CN201610025248.2A CN201610025248A CN105508246A CN 105508246 A CN105508246 A CN 105508246A CN 201610025248 A CN201610025248 A CN 201610025248A CN 105508246 A CN105508246 A CN 105508246A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/06—Silencing
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- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a rolling rotor type twin-stage compressor which comprises a first-stage air cylinder, a first-stage exhaust cavity, an enthalpy increase component and a second-stage air cylinder; the first-stage exhaust cavity is communicated with an exhaust opening of the first-stage air cylinder and communicated with an air sucking opening of the second-stage air cylinder and an outlet of the enthalpy increase component through a middle flow channel; the displacement of the first-stage air cylinder is V1, the volume of the first-stage exhaust cavity is V2, and the sum of the volume of an enthalpy increase component cavity and the volume of the middle flow channel is the volume of a medium pressure cavity and is recoded as V5, wherein 1<V2:V1<7, and 3<V5:V1<15. By means of the rolling rotor type twin-stage compressor, pressure fluctuation of an air supplement pipe one-way valve can be lowered, and vibration noise of a one-way valve core is eliminated.
Description
Technical field
The present invention relates to Compressor Technology field, be specifically related to a kind of rolling rotor-type compound compressor.
Background technique
The structure of the built-in intermediate cavity of the many employings of existing rotator type Dual-level enthalpy adding compressor, middle compression refrigerant is directly injected to this intermediate cavity by pipeline.When system cloud gray model, for preventing the refrigeration agent in intermediate cavity from pouring in down a chimney, the pipeline normally between compressor increasing enthalpy mouth and flash vessel installs one-way valve, such as shown in figures 1 to 6, one-way valve is arranged on solenoid valve and increases between enthalpy parts.During the work of this type of Dual-level enthalpy adding compressor, low pressure refrigerant is drained into intermediate cavity after one-level cylinder compression, then is inhaled in secondary cylinder through intermediate cavity.Because one-level cylinder exhaust process has intermittence, the pressure in intermediate cavity can produce fluctuation, and this fluctuation of intermediate cavity internal pressure can be passed to one-way valve by blowdown pipe, and causes the chatter of inner elements of check valve, thus produces the problems such as abnormal sound.On the other hand, arrange too high because of system intermediate pressure or control unstable, also can cause mending gas carrying liquid, make too much liquid refrigerant enter intermediate cavity and secondary cylinder, form liquid hammer, cause compressor reliability to reduce.
Therefore, how effectively solving blowdown pipe road one-way valve vibrating noise problem, and how to prevent high pressure stage absorbing gas belt liquid, raising compressor operating reliability, is the technical barrier that those skilled in the art perplexs for a long time.
Summary of the invention
In view of the above-mentioned present situation of prior art, main purpose of the present invention is to provide a kind of rolling rotor-type compound compressor, and it can reduce the pressure surge of tonifying Qi line check valve, and then eliminates inner elements of check valve chatter noise.
Above-mentioned purpose is achieved through the following technical solutions:
A kind of rolling rotor-type compound compressor, it comprises one-level cylinder, one-level exhaust cavity, increase enthalpy parts, secondary cylinder, described one-level exhaust cavity is communicated with the relief opening of described one-level cylinder, and through the intakeport of intermediate flow channel and described secondary cylinder, the outlet of described increasing enthalpy parts, wherein, the discharge capacity of described one-level cylinder is V1, the volume of described one-level exhaust cavity is V2, the volume of described one-level exhaust cavity, the described volume of increasing enthalpy part cavity and the volume sum of described intermediate flow channel are middle pressure chamber volume, be designated as V5, wherein, 1<V2:V1<7, and 3<V5:V1<15.
Preferably, described compound compressor is twin-tub compound compressor, it comprises the lower flange, lower cylinder, dividing plate, upper cylinder and the upper flange that set gradually from bottom to top, wherein, described lower cylinder is one-level cylinder, described upper cylinder is secondary cylinder, and described one-level exhaust cavity is arranged in described lower flange.
Preferably, described one-level displacement volume V1, one-level exhaust cavity volume V2, middle pressure chamber volume V5 meet: 2<V2:V1<4, and 5<V5:V1<10.
Preferably, described compound compressor is three cylinder compound compressors, it comprises the lower flange, lower cylinder, lower clapboard, middle cylinder, central diaphragm, upper clapboard, upper cylinder and the upper flange that set gradually from bottom to top, wherein said lower cylinder and described middle cylinder are one-level cylinder, described upper cylinder is secondary cylinder, the first exhaust cavity is provided with in described lower flange, be provided with the second exhaust cavity in described central diaphragm, described first exhaust cavity and described second exhaust cavity form described one-level exhaust cavity jointly.
Preferably, the discharge capacity of described lower cylinder is V11, the discharge capacity of described middle cylinder is V12, V1=V11+V12, the volume of described first exhaust cavity is V21, and the volume of described second exhaust cavity is V22, V2=V21+V22, wherein, 1.5<V21:V11<11, and 0.5<V22:V12<5.
Preferably, described one-level displacement volume V1, one-level exhaust cavity volume V2, middle pressure chamber volume V5 meet: 2<V2:V1<5, and 5<V5:V1<11.
Preferably, the discharge capacity V11 of described lower cylinder, the discharge capacity V12 of described middle cylinder, the volume V21 of described first exhaust cavity, the volume V22 of described second exhaust cavity meets: 4<V21:V11<8, and 1<V22:V12<3.
Preferably, described lower cylinder comprises lower cylinder body, lower roller and lower slide plate, and wherein, described lower slide plate is arranged in the vane slot on described lower cylinder body slidably, and the front end of described lower slide plate keeps contacting with described lower roller; And/or,
Described upper cylinder comprises upper cylinder body, upper roller and upper slide plate, and wherein, described upper slide plate is arranged in the vane slot on described upper cylinder body slidably, and the front end of described upper slide plate keeps and described upper roller contact.
Preferably, described lower cylinder comprises lower cylinder body, lower roller and lower slide plate, and wherein, described lower slide plate is arranged in the vane slot on described lower cylinder body slidably, and the front end of described lower slide plate keeps contacting with described lower roller; And/or,
Described middle cylinder comprises middle cylinder body, middle roller and middle slide plate, and wherein, described middle slide plate is arranged in the vane slot on described cylinder body slidably, and the front end of described middle slide plate keeps and described middle roller contact; And/or,
Described upper cylinder comprises upper cylinder body, upper roller and upper slide plate, and wherein, described upper slide plate is arranged in the vane slot on described upper cylinder body slidably, and the front end of described upper slide plate keeps and described upper roller contact.
Preferably, when described lower cylinder comprises lower cylinder body, lower roller and lower slide plate, pin hole is provided with in described lower flange, pin is slidably arranged in described pin hole, described lower slide plate is provided with slide plate cotter slot, and the head of described pin embeds or do not embed in described slide plate cotter slot to realize locking to described lower slide plate or unblock.
Rolling rotor-type compound compressor of the present invention can reduce the pressure surge of tonifying Qi line check valve, eliminates inner elements of check valve chatter noise.Meanwhile, rolling rotor-type compound compressor of the present invention also can improve compressor performance, prevents secondary absorbing gas belt liquid, improves reliability.
Accompanying drawing explanation
Be described hereinafter with reference to the preferred implementation of accompanying drawing to rolling rotor-type compound compressor of the present invention.In figure:
Fig. 1 is the compound compressor system cloud gray model principle schematic of one embodiment of the present invention;
Fig. 2 is the schematic appearance of the compound compressor in the mode of execution of Fig. 1;
Fig. 3 is compound compressor structure in the mode of execution of Fig. 1 and refrigerant flowpath schematic diagram;
Fig. 4 is the schematic diagram of the increasing enthalpy parts volume in the mode of execution of Fig. 1;
Fig. 5 is the lower flange structural representation in the mode of execution of Fig. 1;
Fig. 6 is the compound compressor system cloud gray model principle schematic of another embodiment of the invention;
Fig. 7 is the schematic appearance of the compound compressor in the mode of execution of Fig. 6;
Fig. 8 is compound compressor structure in the mode of execution of Fig. 6 and refrigerant flowpath schematic diagram;
Fig. 9 is the central diaphragm structural representation in the mode of execution of Fig. 6;
Figure 10 be compound compressor of the present invention when working under a kind of operating mode compressor increase the situation of enthalpy component entry place's pressure surge;
Figure 11 be compound compressor of the present invention when working under another kind of operating mode compressor increase enthalpy component entry place's pressure surge situation;
The performance efficiency variation tendency of Figure 12 compressor when to be compound compressor of the present invention work under another kind of operating mode again.
Embodiment
For the tonifying Qi line check valve vibrating noise problem existed in prior art, and the problem of high pressure stage absorbing gas belt liquid, the present invention finds with test after deliberation, by rationally arranging the volume of one-level displacement volume and involving chamber, just can alleviate or eliminating foregoing problems.
For this reason, the invention provides a kind of rolling rotor-type compound compressor, typically, this compound compressor comprises one-level cylinder, one-level exhaust cavity, increases enthalpy parts, secondary cylinder, wherein, described one-level exhaust cavity is communicated with the relief opening of described one-level cylinder, and through intermediate flow channel and the intakeport of described secondary cylinder, the outlet of described increasing enthalpy parts.
For this kind of compound compressor, the discharge capacity of described one-level cylinder is designated as V1, the volume of described one-level exhaust cavity is designated as V2, the volume V2 of described one-level exhaust cavity, the volume (being designated as V3) of described increasing enthalpy part cavity and volume (the being designated as V4) sum of described intermediate flow channel are called middle pressure chamber volume, be designated as V5, namely, V5=V2+V3+V4, then, work as 1<V2:V1<7, and during 3<V5:V1<15, the pressure surge of tonifying Qi line check valve can be reduced, eliminate inner elements of check valve chatter noise, simultaneously, also compressor performance can be improved, prevent secondary (high pressure stage) absorbing gas belt liquid, improve reliability.
Preferably, first see Fig. 1, that schematically illustrate the running principle figure of the compound compressor system of one embodiment of the present invention.In present embodiment, described compound compressor is twin-tub compound compressor (Fig. 2 is shown in by its Exemplary Appearance schematic diagram, and internal structure is shown in Fig. 3).The air-conditioning system of this twin-tub compound compressor mainly comprises: compound compressor (comprise compressor body, liquor separator parts 21 and increase enthalpy parts 22), condenser 25, vaporizer 24, flash vessel 23, one-level throttle mechanism 26, two-step throttle mechanism 27, four-way valve 28 etc., and solenoid valve 29 and one-way valve 30 is provided with on increasing enthalpy loop.Opening and closedown by Controlling solenoid valve 29, just can realize switch control rule system being increased to enthalpy.
The refrigerant circulating process of this system is: the gaseous refrigerant flowing into compressor through vaporizer 24 (referred to here as the first loop) carries out after first compression through one-level cylinder, be drained in compressor one-level exhaust cavity, with after increasing the refrigerant mixed that enthalpy pipeline (referred to here as second servo loop) flows into, be inhaled into secondary cylinder again and carry out secondary compression, refrigeration agent after two-stage compression enters condenser 25 after discharging compressor, after one-level throttle mechanism 26 throttling, flash vessel 23 is entered after this, through shwoot in flash vessel 23, gaseous refrigerant flows into and increases enthalpy pipeline, remaining then enters vaporizer 24 through cold liquid refrigerant after two-step throttle mechanism 27 throttling, so far, complete a circulation.
Particularly, see Fig. 3, this twin-tub compound compressor comprises the lower flange 2, lower cylinder 3, dividing plate 4, upper cylinder 5 and the upper flange 6 that set gradually from bottom to top, wherein, described lower cylinder 3 is one-level cylinder, described upper cylinder 5 is secondary cylinder, and described one-level exhaust cavity 14 is arranged in described lower flange 2.
For above-mentioned twin-tub compound compressor, preferably, when described one-level displacement volume V1, one-level exhaust cavity volume V2, middle pressure chamber volume V5 meet: 2<V2:V1<4, and during 5<V5:V1<10, more effectively can reduce the pressure surge of tonifying Qi line check valve, eliminate inner elements of check valve chatter noise, simultaneously, also can further improve compressor performance, prevent secondary (high pressure stage) absorbing gas belt liquid, improve reliability (specifically can see Figure 10-12).
Further, this twin-tub compound compressor such as also comprises the cover plate 1 be positioned at below lower flange 2, and one-level exhaust cavity 14 is such as closed by from below.Intermediate flow channel 15 along the vertical direction through lower flange 2, lower cylinder 3 and dividing plate 4, and passes in upper cylinder 5.Bent axle 9 is through upper cylinder 5 and lower cylinder 3, upper roller 11 in upper cylinder 5, the lower roller 10 in lower cylinder 3 are set on the corresponding shaft part on bent axle 9 respectively, also comprise slide plate (not shown) in upper cylinder 5, in lower cylinder 3, also comprise lower slide plate (not shown).Such as, described lower slide plate is arranged in the vane slot on described lower cylinder body slidably, and the front end of described lower slide plate keeps contacting with described lower roller 10; Described upper slide plate is arranged in the vane slot on described upper cylinder body slidably, and the front end of described upper slide plate keeps contacting with described upper roller 11.When bent axle 9 rotates, upper roller 11 and lower roller 10 roll in corresponding cylinder body inner chamber, form volume continually varying air aspiration cavity and exhaust cavity with corresponding slide plate (upper slide plate and lower slide plate) respectively simultaneously, just can realize air-breathing, compression and exhaust.
The composition such as bent axle 9, upper flange 6, upper cylinder 5, upper roller 11, dividing plate 4, lower cylinder 3, lower roller 10, lower flange 2 and cover plate 1 pump assembly.Pump assembly is contained in frame set, and the lower end of frame set and upper end are provided with lower cover 12 and cover assembly 13 respectively hermetically.Also comprise motor (it comprises stator 7 and rotor 8) in frame set, bent axle 9 is connected with motor shaft.The entirety that aforesaid compressor body refers to cover assembly, frame set, the pump assembly, motor etc. of lower cover and inside are formed.Upper cover relief opening is arranged on cover assembly 13.
The running principle of this twin-tub compound compressor is: under the dragging of motor, pump assembly operates, the refrigeration agent returned from system first loop enters lower cylinder 3 by liquor separator parts 21, be expelled in one-level exhaust cavity 14 after first time compression, then with from system second servo loop mixed by the refrigeration agent increasing enthalpy parts 22 and enter pump assembly, mixed refrigeration agent enters upper cylinder 5 and carries out second time compression, the upper space of compressor housing assembly is expelled to after second time compression, discharged by upper cover relief opening again, so far compressor completes the whole compression process of refrigeration agent.
The flow path of refrigeration agent in compressor inside is schematically illustrated by the arrow in Fig. 3.
Fig. 4 gives the typical structure increasing enthalpy parts 22, and it comprises increasing enthalpy component entry 221 and increases enthalpy knockdown export 222.In the compound compressor of the present embodiment, increase enthalpy knockdown export 222 and be connected to lower flange 2, directly communicate with one-level exhaust cavity 14.Wherein, the cavity volume V3 increasing enthalpy parts refers to the total measurement (volume) increasing enthalpy component entry 221 and increase between enthalpy knockdown export 222.
Fig. 5 gives the preferred structure of lower flange 2.This lower flange comprises the axial boss 201 being positioned at middle part and the axial ledge 202 being positioned at periphery, and the space between described axial boss 201 and described axial ledge 202 is described one-level exhaust cavity 14.The cavity bottom of this one-level exhaust cavity 14 is provided with relief opening 141, and described relief opening 141 forms a part for intermediate flow channel 15.It is envisioned that the cavity bottom of one-level exhaust cavity 14 can also arrange another relief opening (not shown), it such as communicates with the exhaust cavity of lower cylinder.
Preferably, see Fig. 6, that schematically illustrate the running principle figure of the compound compressor system of another embodiment of the invention.In present embodiment, described compound compressor is three cylinder compound compressors (Fig. 7 is shown in by its Exemplary Appearance schematic diagram, and internal structure is shown in Fig. 8).The composition of the air-conditioning system of the composition of the air-conditioning system of this three cylinders compound compressor and the twin-tub compound compressor shown in Fig. 1 is basically identical, also be mainly comprise: compound compressor (comprise compressor body, liquor separator parts 20 and increase enthalpy parts 22), condenser 25, vaporizer 24, flash vessel 23, one-level throttle mechanism 26, two-step throttle mechanism 27, four-way valve 28 etc., and solenoid valve 29 and one-way valve 30 is provided with on increasing enthalpy loop.Opening and closedown by Controlling solenoid valve 29, just can realize switch control rule system being increased to enthalpy.
Particularly, see Fig. 8, this three cylinders compound compressor comprises the lower flange 32 set gradually from bottom to top, lower cylinder 33, lower clapboard 34, middle cylinder 35, central diaphragm 36, upper clapboard 37, upper cylinder 38 and upper flange 39, wherein said lower cylinder 33 and described middle cylinder 35 are one-level cylinder, described upper cylinder 38 is secondary cylinder, the first exhaust cavity 43a is provided with in described lower flange 32, the second exhaust cavity 43b is provided with in described central diaphragm 36, described first exhaust cavity 43a and described second exhaust cavity 43b forms described one-level exhaust cavity 43 jointly, such as the first exhaust cavity 43a is communicated with through intermediate flow channel 44 with described second exhaust cavity 43b.
For above-mentioned three cylinder compound compressors, preferably, the discharge capacity of described lower cylinder is designated as V11, the discharge capacity of described middle cylinder is designated as V12, then V1=V11+V12, the volume of described first exhaust cavity is designated as V21, the volume of described second exhaust cavity is designated as V22, then V2=V21+V22, wherein, when these parameters meet: 1.5<V21:V11<11, and during 0.5<V22:V12<5, more effectively can reduce the pressure surge of tonifying Qi line check valve, eliminate inner elements of check valve chatter noise, simultaneously, also can further improve compressor performance, prevent secondary (high pressure stage) absorbing gas belt liquid, improve reliability.
Preferably, when described one-level displacement volume V1, one-level exhaust cavity volume V2, middle pressure chamber volume V5 meet: 2<V2:V1<5, and during 5<V5:V1<11, for the pressure surge, the elimination inner elements of check valve chatter noise that reduce tonifying Qi line check valve, and prevent secondary absorbing gas belt liquid, raising reliability advantageously.
Further preferably, as the discharge capacity V11 of described lower cylinder, the discharge capacity V12 of described middle cylinder, the volume V21 of described first exhaust cavity, the volume V22 of described second exhaust cavity meets: 4<V21:V11<8, and during 1<V22:V12<3, be conducive to the pressure surge, the elimination inner elements of check valve chatter noise that reduce tonifying Qi line check valve further, and prevent secondary absorbing gas belt liquid, raising reliability.
Further, be such as also provided with cover plate 31 below lower flange 32 (lower flange 2 of its similar in last mode of execution), the first exhaust cavity 43a such as closes by from below.Intermediate flow channel 44 along the vertical direction through lower flange 32, lower cylinder 33, lower clapboard 34, middle cylinder 35, central diaphragm 36 and upper clapboard 37, and passes in upper cylinder 38.Bent axle 9 is through upper cylinder 38, middle cylinder 35 and lower cylinder 33, and the lower roller 40 in the upper roller 42 in upper cylinder 38, the middle roller 41 in middle cylinder 35, lower cylinder 33 is set on the corresponding shaft part on bent axle 9 respectively.
Preferably, described lower cylinder 33 comprises lower cylinder body, lower roller 40 and lower slide plate (not shown in Fig. 8, can see Fig. 6), wherein, described lower slide plate is arranged in the vane slot on described lower cylinder body slidably, and the front end of described lower slide plate keeps contacting with described lower roller 40.
Similarly, described middle cylinder 35 comprises middle cylinder body, middle roller 41 and middle slide plate (not shown in Fig. 8, can see Fig. 6), wherein, described middle slide plate is arranged in the vane slot on described cylinder body slidably, and the front end of described middle slide plate keeps contacting with described middle roller 41.
Similarly, described upper cylinder 38 comprises upper cylinder body, upper roller 42 and upper slide plate, and wherein, described upper slide plate is arranged in the vane slot on described upper cylinder body slidably, and the front end of described upper slide plate keeps and described upper roller contact.
When bent axle 9 rotates, upper roller 42, middle roller 41 and lower roller 40 roll in corresponding cylinder body inner chamber, form volume continually varying air aspiration cavity and exhaust cavity with corresponding slide plate (upper slide plate, middle slide plate and lower slide plate) respectively simultaneously, just can realize air-breathing, compression and exhaust.
With last mode of execution similarly, bent axle 9, upper flange 39, upper cylinder 38, upper roller 42, upper slide plate, upper clapboard 37, central diaphragm 36, middle cylinder 35, middle roller 41, middle slide plate, lower clapboard 34, lower cylinder 33, lower roller 40, lower slide plate, lower flange 32 and cover plate 31 etc. composition pump assembly.Pump assembly is contained in frame set, and the lower end of frame set and upper end are provided with lower cover 12 and cover assembly 13 respectively hermetically.Also comprise motor (it comprises stator 7 and rotor 8) in frame set, bent axle 9 is connected with motor shaft.Aforesaid compressor body refers to the pump assembly, motor etc. of cover assembly, frame set, lower cover and inside.Upper cover relief opening is arranged on cover assembly 13.
Compressor due to present embodiment is three cylinder compound compressors, and lower cylinder and middle cylinder are one-level cylinder, and therefore, liquor separator parts 20 have two output pipes (as Figure 7-8), are connected to the intakeport of lower cylinder and middle cylinder respectively.
In present embodiment, the structure increasing enthalpy parts 22 is identical with the increasing enthalpy parts 22 in last mode of execution.Unlike, in present embodiment, the outlet 222 increasing enthalpy parts 22 is connected on the body of upper cylinder 38, directly communicates with the intakeport of upper cylinder, and communicates with intermediate flow channel 44, thus also communicate with one-level exhaust cavity 43.
The running principle of this three cylinders compound compressor is: under the dragging of motor, pump assembly operates, the refrigeration agent returned from system first loop enters lower cylinder 33 and middle cylinder 35 respectively by liquor separator parts 20, after first time compression, be expelled in one-level exhaust cavity 43 that (lower cylinder 33 enters the cavity 43a in lower flange, middle cylinder enters the cavity 43b in central diaphragm), then with from system second servo loop mixed by the refrigeration agent increasing enthalpy parts 22 and enter pump assembly, mixed refrigeration agent enters upper cylinder 38 and carries out second time compression, the upper space of compressor housing assembly is expelled to after second time compression, discharged by upper cover relief opening again, so far compressor completes the whole compression process of refrigeration agent.
The flow path of refrigeration agent in compressor inside is schematically illustrated by the arrow in Fig. 8.
Fig. 9 gives the preferred structure of central diaphragm 36.This central diaphragm 36 entirety is discoideus, its one side towards upper clapboard is provided with cavity, this cavity is the second exhaust cavity 43b, two relief openings 431 and 432 are also provided with in the bottom of cavity, one of them relief opening 431 is such as used as the relief opening of middle cylinder 35, make the exhaust of middle cylinder can enter in the second exhaust cavity 43b, another relief opening 432 such as forms a part for intermediate flow channel 44, and the second exhaust cavity 43b can be communicated with the first exhaust cavity 43a.Such as, as shown in Figure 9, relief opening 431 is circular hole, and relief opening 432 is elongated hole.
Preferably, for the lower cylinder in present embodiment, can also be arranged to further (such as can contrast Fig. 6): in described lower flange 32, be provided with pin hole, pin is provided with slidably in described pin hole, described lower slide plate is provided with slide plate cotter slot, and the head of described pin can embed or not embed in described slide plate cotter slot to realize the locking of described lower slide plate or unblock.When the head of pin embeds in slide plate cotter slot, lower slide plate is locked in its vane slot, and make it that front end can not be kept to contact with lower roller, thus lower cylinder can not complete the process of air-breathing, compression, exhaust, thus lower cylinder is in unloaded state.When pin head is thrown off from slide plate cotter slot, pin is arranged in pin hole on the whole, lower slide plate is unlocked, thus can slide in vane slot, thus keep front end to contact with lower roller, lower cylinder normally can complete the process of air-breathing, compression, exhaust, and lower cylinder is thus in running order.By controlling the position of pin, thus controlling work or the unloaded state of lower cylinder, transfiguration control can be carried out to compressor.
Illustrate that compressor of the present invention is reducing in the pressure surge increasing enthalpy line check valve (also namely increasing enthalpy component entry place) and improving the beneficial effect presented in compressor performance below in conjunction with test result.
As shown in Figure 10, under a kind of operating mode (evaporating temperature 0 DEG C, condensing temperature 41 DEG C, supercooling temperature 32 DEG C, inhalation temperature 7 DEG C), increasing enthalpy component entry place's pressure surge situation that compressor of the present invention (three cylinders) is surveyed at work.In figure, abscissa is frequency (Hz), and y coordinate is pressure surge value.In figure, two curves represent two kinds of settings of " V2/V1=3.3, V5/V1=4.39 " and " V2/V1=3.3, V5/V1=9.11 " respectively.Can find out, the latter is obviously better than the former in reduction pressure surge.In addition, for these two kinds settings, along with the increase of frequency, the value of pressure surge presents downward trend all substantially, and particularly after frequency reaches 50Hz, obvious decline all appears in the value of pressure surge.
Figure 11 is under another kind of operating mode (evaporating temperature 9 DEG C, condensing temperature 51 DEG C, supercooling temperature 40 DEG C, inhalation temperature 21 DEG C), increasing enthalpy component entry place's pressure surge situation that compressor of the present invention (three cylinders) is surveyed at work.Similarly, in figure, abscissa is still frequency (Hz), and y coordinate is still for pressure surge value, and in figure, two curves still represent two kinds of settings of " V2/V1=3.3, V5/V1=4.39 " and " V2/V1=3.3, V5/V1=9.11 " respectively.Can find out, compressor of the present invention is to reduce the effect in pressure surge substantially identical with the rule shown in Figure 10 under this operating mode, and sufficient proof compressor of the present invention passes through rationally to arrange the technique effect acquired by relation between each discharge capacity, volume.
Figure 12 is (evaporating temperature 9 DEG C under another kind of operating mode, condensing temperature 51 DEG C, supercooling temperature 40 DEG C, inhalation temperature 21 DEG C), compressor of the present invention (three cylinders) at 60 hz its performance efficiency (representing with COP, the ratio for compressor monomer refrigerating capacity and power consumption) with the variation tendency of ratio V2/V1.Can find out in figure, when the value of V2/V1 is less, such as, when being less than 1, the performance efficiency of compressor is lower, and the increase of value along with V2/V1, the performance efficiency of compressor is the trend of monotone increasing, particularly when the value of V2/V1 reaches after 1, the performance efficiency of compressor reaches 3.15, and is tending towards stability gradually subsequently, such as when the value of V2/V1 reaches after 5, the lifting of the performance efficiency of compressor is not obvious.Therefore, the basic span of V2/V1 is defined as between 1 ~ 7 by the present invention.
To sum up, the present invention is mainly through the relation of reasonable set one-level displacement volume, one-level exhaust cavity volume and middle pressure chamber volume etc., reduce the pressure surge of intermediate cavity, reach the pressure surge reducing tonifying Qi line check valve, the effect eliminating inner elements of check valve chatter noise.On the other hand, by reasonable set forgoing relationship, also reach the effect improving compressor performance and reliability, prevent secondary absorbing gas belt liquid simultaneously.
Those skilled in the art will readily understand, under the prerequisite of not conflicting, above-mentioned measures freely can combine, superpose.
Be to be understood that, above-mentioned mode of execution is only exemplary, and it is nonrestrictive, when not departing from basic principle of the present invention, the various obvious or equivalent amendment that those skilled in the art can make for above-mentioned details or replacement, all will be contained in right of the present invention.
Claims (10)
1. a rolling rotor-type compound compressor, it comprises one-level cylinder, one-level exhaust cavity, increase enthalpy parts, secondary cylinder, described one-level exhaust cavity is communicated with the relief opening of described one-level cylinder, and through the intakeport of intermediate flow channel and described secondary cylinder, the outlet of described increasing enthalpy parts, it is characterized in that, the discharge capacity of described one-level cylinder is V1, the volume of described one-level exhaust cavity is V2, the volume of described one-level exhaust cavity, the described volume of increasing enthalpy part cavity and the volume sum of described intermediate flow channel are middle pressure chamber volume, be designated as V5, wherein, 1<V2:V1<7, and 3<V5:V1<15.
2. rolling rotor-type compound compressor according to claim 1, it is characterized in that, described compound compressor is twin-tub compound compressor, it comprises the lower flange, lower cylinder, dividing plate, upper cylinder and the upper flange that set gradually from bottom to top, wherein, described lower cylinder is one-level cylinder, and described upper cylinder is secondary cylinder, and described one-level exhaust cavity is arranged in described lower flange.
3. rolling rotor-type compound compressor according to claim 2, it is characterized in that, described one-level displacement volume V1, one-level exhaust cavity volume V2, middle pressure chamber volume V5 meet: 2<V2:V1<4, and 5<V5:V1<10.
4. rolling rotor-type compound compressor according to claim 1, it is characterized in that, described compound compressor is three cylinder compound compressors, it comprises the lower flange set gradually from bottom to top, lower cylinder, lower clapboard, middle cylinder, central diaphragm, upper clapboard, upper cylinder and upper flange, wherein said lower cylinder and described middle cylinder are one-level cylinder, described upper cylinder is secondary cylinder, the first exhaust cavity is provided with in described lower flange, the second exhaust cavity is provided with in described central diaphragm, described first exhaust cavity and described second exhaust cavity form described one-level exhaust cavity jointly.
5. rolling rotor-type compound compressor according to claim 4, it is characterized in that, the discharge capacity of described lower cylinder is V11, and the discharge capacity of described middle cylinder is V12, V1=V11+V12, the volume of described first exhaust cavity is V21, the volume of described second exhaust cavity is V22, V2=V21+V22, wherein, 1.5<V21:V11<11, and 0.5<V22:V12<5.
6. the rolling rotor-type compound compressor according to claim 4 or 5, it is characterized in that, described one-level displacement volume V1, one-level exhaust cavity volume V2, middle pressure chamber volume V5 meet: 2<V2:V1<5, and 5<V5:V1<11.
7. rolling rotor-type compound compressor according to claim 6, it is characterized in that, the discharge capacity V11 of described lower cylinder, the discharge capacity V12 of described middle cylinder, the volume V21 of described first exhaust cavity, the volume V22 of described second exhaust cavity meets: 4<V21:V11<8, and 1<V22:V12<3.
8. the rolling rotor-type compound compressor according to Claims 2 or 3, it is characterized in that, described lower cylinder comprises lower cylinder body, lower roller and lower slide plate, wherein, described lower slide plate is arranged in the vane slot on described lower cylinder body slidably, and the front end of described lower slide plate keeps contacting with described lower roller; And/or,
Described upper cylinder comprises upper cylinder body, upper roller and upper slide plate, and wherein, described upper slide plate is arranged in the vane slot on described upper cylinder body slidably, and the front end of described upper slide plate keeps and described upper roller contact.
9. according to the rolling rotor-type compound compressor one of claim 4-7 Suo Shu, it is characterized in that, described lower cylinder comprises lower cylinder body, lower roller and lower slide plate, wherein, described lower slide plate is arranged in the vane slot on described lower cylinder body slidably, and the front end of described lower slide plate keeps contacting with described lower roller; And/or,
Described middle cylinder comprises middle cylinder body, middle roller and middle slide plate, and wherein, described middle slide plate is arranged in the vane slot on described cylinder body slidably, and the front end of described middle slide plate keeps and described middle roller contact; And/or,
Described upper cylinder comprises upper cylinder body, upper roller and upper slide plate, and wherein, described upper slide plate is arranged in the vane slot on described upper cylinder body slidably, and the front end of described upper slide plate keeps and described upper roller contact.
10. rolling rotor-type compound compressor according to claim 9, it is characterized in that, when described lower cylinder comprises lower cylinder body, lower roller and lower slide plate, pin hole is provided with in described lower flange, pin is slidably arranged in described pin hole, described lower slide plate is provided with slide plate cotter slot, and the head of described pin embeds or do not embed in described slide plate cotter slot to realize locking to described lower slide plate or unblock.
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