CN208749554U - Compressor and air-conditioning system - Google Patents

Abstract

The utility model provides a kind of compressor and air-conditioning system.Compressor includes: electric machine assembly；Pump assembly, pump assembly include crankshaft, upper flange, lower flange, lower cover plate and cylinder assembly, and lower flange is provided with cavity away from the side of cylinder assembly, the first air entry and the second air entry being connected to cavity are provided on the side wall of lower flange；Dispenser component, is arranged in the outside of casing assembly, and the outlet conduit of dispenser component is connect with the first air entry；Refrigerant pipe, first end are connect with the inlet duct of dispenser component or outlet conduit, and the second end of refrigerant pipe is extended downwardly above electric machine assembly and connect with the second air entry；The aperture for controlling refrigerant pipe on refrigerant pipe according to the discharge superheat size of compressor is arranged in control valve.The utility model can reduce the risk of compressor liquid hammer, and then the slide plate of compressor and roller is prevented to be detached from, and reduces vibration of compressor noise, improves compressor performance and reliability.

Description

Compressor and air-conditioning system

Technical field

The utility model relates to air-conditioning technical fields, in particular to a kind of compressor and air-conditioning system.

Background technique

Rotor compressor is in light load low-frequency operation, since refrigerating/heating load is small, is easy to cause evaporator evaporation not Complete situation, the refrigerant come out from evaporator is gas-liquid two-phase state, when gas-liquid mixed refrigerant enters compresser cylinder In be easy to cause liquid hammer, liquid hammer is very big to the harm of compressor: first is that increasing compressor horsepower, be easy to cause abrasion, it is right Compressor reliability is very unfavorable, second is that may cause roller and slide plate disengaging, slide plate is caused to hit to form abnormal make an uproar with roller Sound simultaneously influences reliability, while roller and slide plate disengaging will lead to serious internal leakage, substantially reduce compressor refrigerating capacity.

Rotor compressor gas-liquid separator main function is to separate liquid and gas refrigerant, prevents compressor operating Absorbing gas belt liquid in the process generates liquid hammer, causes compressor pump damage parts.But show from many experiments when with liquid measure is larger When, dispenser can not carry out gas-liquid separation completely, and there are liquid hammer risks.

Rotor compressor air-breathing with liquid how is solved, is the emphasis problem for improving rotor compressor Performance And Reliability.

Utility model content

The main purpose of the utility model is to provide a kind of compressor and air-conditioning systems, to solve to compress in the prior art Machine is easy to appear the problem of liquid hammer risk.

To achieve the goals above, one aspect according to the present utility model provides a kind of compressor, comprising: shell Component, the casing assembly, which encloses, to be set to form installation cavity；Electric machine assembly, the electric machine assembly are mounted in the installation cavity；The pump housing Component, the pump assembly include crankshaft, upper flange, lower flange, lower cover plate and cylinder assembly, and the cylinder assembly is set in On the crankshaft, the electric machine assembly and the crankshaft are drivingly connected, and the upper flange is set on the crankshaft and is located at institute The upper surface of cylinder assembly is stated, the lower flange is set in the lower end surface on the crankshaft and being located at the cylinder assembly, described Lower cover plate lid is located at the lower end surface of the lower flange, and the lower flange is provided with cavity away from the side of the cylinder assembly, institute State the first air entry and the second air entry for being provided on the side wall of lower flange and being connected to the cavity；Dispenser component, it is described The outside of the casing assembly is arranged in dispenser component, and the outlet conduit of the dispenser component and first air entry connect It connects；Refrigerant pipe, the first end of the refrigerant pipe are connect with the inlet duct of the dispenser component or the outlet conduit, institute The second end for stating refrigerant pipe is extended downwardly above the electric machine assembly and is connect with second air entry；Control valve, institute Control valve is stated to be arranged on the refrigerant pipe to control opening for the refrigerant pipe according to the discharge superheat size of the compressor Degree.

Further, it is provided with exhaust pipe at the top of the casing assembly, is provided at the exhaust pipe for detecting State the detection components of the discharge superheat size of compressor.

Further, the detection components include pressure sensor and temperature sensor.

Further, the refrigerant pipe is copper pipe, and the copper pipe and second air entry interference fit connect.

Further, the periphery for the linkage section that the refrigerant pipe is used to connect with second air entry is provided with sealing Layer.

Further, the sealant is zinc coat.

Further, the diameter of the refrigerant pipe isExtremely

Further, the refrigerant pipe includes horizontal extension section and vertical extended segment, and the horizontal extension section is located at described The top of electric machine assembly, the vertical extended segment are connect with the horizontal extension section, and are extended from the top of the electric machine assembly It is connect after to the lower section of the electric machine assembly with second air entry.

Further, the gap for avoiding the refrigerant pipe is provided on the electric machine assembly and the upper flange.

Further, the refrigerant pipe is provided with check valve at second air entry position.

Further, the compressor further includes variable frequency drives, the variable frequency drives and the detection components and institute The equal communication connection of control valve is stated, when the detection components detect the discharge superheat of the compressor less than predetermined value, institute It states variable frequency drives and controls the control valve opening；When the detection components detect that the discharge superheat of the compressor is not small When the predetermined value, the variable frequency drives control the control valve and close.

Further, the control valve is electrically-controlled valve.

Further, the cylinder assembly includes the first cylinder, lower end surface and the lower flange of first cylinder Upper surface is bonded, the suction inlet for being provided with suction tank on first cylinder and being connected to the suction tank, on the lower flange It is provided with outlet, the suction tank is connected to the outlet.

Another aspect according to the present utility model, provides a kind of air-conditioning system, including compressor, and the compressor is upper The compressor stated.

Using the technical solution of the utility model, under normal circumstances, control valve is in off state compressor, is gone out from evaporator The refrigerant vapour for carrying out low-temp low-pressure enters the first air entry of lower flange by dispenser component, is then entered by lower flange It compressed, be vented to cylinder assembly, the gaseous refrigerant of high temperature and pressure is by condenser condensation, throttle valve throttling, evaporator Refrigeration cycle is completed after evaporation.When discharge superheat (the i.e. delivery temperature saturation temperature corresponding with pressure at expulsion of compressor Difference) be less than predetermined value when (discharge superheat is smaller, and there are the possibility of air-breathing with liquid): control valve open, a part refrigeration Agent enters from electric machine assembly top, and refrigerant flows into casing assembly lower space in refrigerant pipe, and gas-liquid is mixed in refrigerant pipe Closing refrigerant suction electric machine assembly and casing assembly upper pyrometer refrigerant heat makes the refrigerant vapor of gas-liquid two-phase state, makes Refrigerant has certain degree of superheat.Meanwhile the refrigerant in refrigerant pipe enters laxative remedy by the second air entry on lower flange It in blue cavity, mixes, exchange heat in the cavity of lower flange with the refrigerant that the first air entry of lower flange is come in, improve refrigeration The mass dryness fraction of agent；On the other hand since lower flange is constantly in compression motor spindle oil sump, and oil sump temperature is higher than suction temperature, therefore The temperature in oil sump can be further absorbed in the cavity of lower flange, further increasing refrigerant mass dryness fraction makes refrigerant have one The fixed degree of superheat, the refrigerant vapour with certain degree of superheat of the utility model enter cylinder assembly by lower flange and are pressed Refrigeration cycle is completed in contracting, exhaust.

Control valve in the utility model can control the refrigerant flow for entering refrigerant pipe by adjusting spool size, And then refrigerant superheat degree is controlled, after suction superheat improves, by refrigeration cycle principle it is found that compressor exhaust temperature can rise Height, and then the compressor air-discharging degree of superheat is improved, after discharge superheat is not less than predetermined value, control valve is closed, so recycle, It is finally reached self-balancing.

As it can be seen that the utility model can be by the discharge superheat of monitoring compressor, when discharge superheat is less than predetermined value When, control valve is opened, and by spool size controller by refrigerant flow, refrigerant enters from motor epicoele, absorbs heat Amount improves the refrigerant suction degree of superheat, and the refrigerant after overheat passes through the second air entry of lower flange, inhales with the first of lower flange The refrigerant that port is come in is mixed in the cavity of lower flange, is exchanged heat, and refrigerant superheat degree is improved, according to refrigeration cycle original Reason, after suction superheat increases, delivery temperature is increased, and after discharge superheat is greater than predetermined value, control valve is closed, and is so recycled Make air-breathing self-balancing and there is certain degree of superheat, reduces the risk of compressor liquid hammer, and then prevent the slide plate and roller of compressor It is detached from, reduces vibration of compressor noise, improve compressor performance and reliability.

Detailed description of the invention

The accompanying drawings constituting a part of this application is used to provide a further understanding of the present invention, this is practical Novel illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model. In the accompanying drawings:

Fig. 1 diagrammatically illustrates the cross-sectional view of the compressor of the utility model；

Fig. 2 diagrammatically illustrates the top view of the first cylinder of the compressor of the utility model；

Fig. 3 diagrammatically illustrates the bottom view of the first cylinder of the compressor of the utility model；

Fig. 4 diagrammatically illustrates the top view of the lower cover plate of the compressor of the utility model；

Fig. 5 diagrammatically illustrates the bottom view of the lower cover plate of the compressor of the utility model；

Fig. 6 diagrammatically illustrates the annexation figure of the air-conditioning system of the utility model.

Wherein, the above drawings include the following reference numerals:

10, casing assembly；11, exhaust pipe；20, electric machine assembly；21, stator；22, rotor；30, pump assembly；31, bent Axis；32, upper flange；33, lower flange；331, the first air entry；332, the second air entry；333, cavity；334, outlet；34, Lower cover plate；35, cylinder assembly；351, the first cylinder；3511, suction tank；3512, suction inlet；36, roller；37, muffler；40, Dispenser component；41, outlet conduit；42, inlet duct；50, control valve；60, refrigerant pipe；61, horizontal extension section；62, vertical Extended segment；70, condenser；80, evaporator；90, throttle valve；100, four-way valve；110, check valve.

Specific embodiment

It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase Mutually combination.The utility model will be described in detail below with reference to the accompanying drawings and embodiments.

It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.

It should be noted that the description and claims of this application and term " first " in above-mentioned attached drawing, " Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way Data be interchangeable under appropriate circumstances, so that presently filed embodiment described herein for example can be in addition to herein Sequence other than those of diagram or description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that Be to cover it is non-exclusive include, for example, containing the process, method, system, product or equipment of a series of steps or units not Those of be necessarily limited to be clearly listed step or unit, but may include be not clearly listed or for these processes, side The intrinsic other step or units of method, product or equipment.

For ease of description, spatially relative term can be used herein, as " ... on ", " ... top ", " ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure Except different direction in use or operation.For example, being described as if the device in attached drawing is squeezed " in other devices It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction " Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and " in ... lower section " two kinds of orientation.The device can also be positioned with other different modes and (is rotated by 90 ° or in other orientation), and And respective explanations are made to the opposite description in space used herein above.

Referring to shown in Fig. 1 to Fig. 6, embodiment according to the present utility model provides a kind of air-conditioning system, in the present embodiment Air-conditioning system include the condenser 70 being successively set on the same circuit, compressor, evaporator 80 and throttle valve 90.

For the ease of realizing air-conditioning system system in cold operating mode and heating the switching between operating mode, in the present embodiment Air-conditioning system further include four-way valve 100, the four-way valve 100 include the first valve port, the second valve port, third valve port and the 4th valve Mouthful, wherein the connection of the dispenser component 40 of the first valve port and compressor, the second valve port connect with condenser 70, third valve port and The exhaust pipe 11 of compressor connects, and the 4th valve port is connect with evaporator 80.

During real work, compressor is easy to appear liquid hammer risk, for this purpose, to the knot of compressor in the present embodiment Structure is improved.

Referring to figs. 1 to 5, the compressor in the present embodiment includes casing assembly 10, electric machine assembly 20, pump assembly 30, dispenser component 40, refrigerant pipe 60 and control valve 50.

Wherein, casing assembly 10 includes cylindrical structure, the upper cover that cylindrical structure upper end is arranged in and is arranged in cylindrical structure The lower cover of lower end, casing assembly 10, which encloses, to be set to form installation cavity；When installation, electric machine assembly 20 and pump assembly 30 are installed in installation It is intracavitary.

Pump assembly 30 include crankshaft 31, upper flange 32, lower flange 33, lower cover plate 34, cylinder assembly 35, roller 36 and Muffler 37, electric machine assembly 20 and crankshaft 31 are drivingly connected, and cylinder assembly 35 is set on crankshaft 31, and roller 36 is mounted on cylinder In component 35, upper flange 32 is set in the upper surface on crankshaft 31 and being located at cylinder assembly 35, and muffler 37 is mounted on upper flange On 32, lower flange 33 is set in the lower end surface on crankshaft 31 and being located at cylinder assembly 35, and the lid of lower cover plate 34 is located at lower flange 33 Lower end surface, when assembling, cylinder assembly 35 is by being threaded through upper flange 32, lower flange 33, lower cover plate 34, the spiral shell on cylinder assembly 35 Bolt is fixed on crankshaft 31.

Lower flange 33 in the present embodiment is provided with cavity 333, the side wall of lower flange 33 away from the side of cylinder assembly 35 On be provided with the first air entry 331 and the second air entry 332 being connected to cavity 333；Dispenser component 40 is arranged in shell group The outside of part 10, the outlet conduit 41 of dispenser component 40 are connect with the first air entry 331, cold convenient for conveying to pump assembly 30 Matchmaker；The first end of refrigerant pipe 60 is connect with the inlet duct 42 of dispenser component 40 or outlet conduit 41, and the of refrigerant pipe 60 Two ends extend downward into from the top of electric machine assembly 20 and connect with the second air entry 332；Control valve 50 is arranged in refrigerant pipe 60 On with according to the discharge superheat size of compressor control refrigerant pipe 60 aperture.

When specific works, under normal circumstances, control valve 50 is in off state compressor, comes out low-temp low-pressure from evaporator 80 Refrigerant vapour enter the first air entry 331 of lower flange 33 by dispenser component 40, then entered by lower flange 33 It being compressed, is vented to cylinder assembly 35, the gaseous refrigerant of high temperature and pressure throttles by the condensation of condenser 70, throttle valve 90, Evaporator 80 completes refrigeration cycle after evaporating.When (i.e. delivery temperature is corresponding with pressure at expulsion full for the discharge superheat of compressor With the difference of temperature) be less than predetermined value when (discharge superheat is smaller, and there are the possibility of air-breathing with liquid): control valve 50 open, Part of refrigerant enters from 20 top of electric machine assembly, and refrigerant flows into 10 lower part of casing assembly sky in refrigerant pipe 60 Between, gas-liquid mixed refrigerant, which absorbs electric machine assembly 20 and 10 upper pyrometer refrigerant heat of casing assembly, in refrigerant pipe 60 makes gas-liquid The refrigerant vapor of two-phase state makes refrigerant have certain degree of superheat.Meanwhile the refrigerant in refrigerant pipe 60 passes through laxative remedy The second air entry 332 on orchid 33 enters in the cavity 333 of lower flange 33, comes in the first air entry 331 of lower flange 33 Refrigerant mixes in the cavity 333 of lower flange 33, exchanges heat, and improves the mass dryness fraction of refrigerant；On the other hand due to lower flange 33 1 It is straight to be in compression motor spindle oil sump, and oil sump temperature is higher than suction temperature, therefore can be into one in the cavity of lower flange 33 333 Step absorbs the temperature in oil sump, and further increasing refrigerant mass dryness fraction makes refrigerant have certain degree of superheat, the utility model Refrigerant vapour with certain degree of superheat is compressed by lower flange 33 into cylinder assembly 35, is vented, and is completed refrigeration and is followed Ring.

Control valve 50 in the present embodiment can control the refrigerant stream for entering refrigerant pipe 60 by adjusting spool size Amount, and then refrigerant superheat degree is controlled, after suction superheat improves, by refrigeration cycle principle it is found that compressor exhaust temperature It can increase, and then improve the compressor air-discharging degree of superheat, after discharge superheat is not less than predetermined value, control valve 50 is closed, such as This circulation, is finally reached self-balancing.

As it can be seen that the utility model can be by the discharge superheat of monitoring compressor, when discharge superheat is less than predetermined value When, control valve 50 is opened, and by spool size controller by refrigerant flow, refrigerant enters from motor epicoele, absorbs Heat improves the refrigerant suction degree of superheat, and the refrigerant after overheat passes through the second air entry 332 of lower flange 33, with lower flange 33 The refrigerant come in of the first air entry 331 mixed, exchanged heat in the cavity 333 of lower flange 33, improve refrigerant superheat Degree, according to refrigeration cycle principle, after suction superheat increases, delivery temperature is increased, after discharge superheat is greater than predetermined value, control Valve 50 processed is closed, and so circulation makes air-breathing self-balancing and has certain degree of superheat, reduces the risk of compressor liquid hammer, and then prevent The slide plate and roller of compressor are detached from, and reduce vibration of compressor noise, improve compressor performance and reliability.

The top of casing assembly 10 in the present embodiment is provided with exhaust pipe 11, by the effect of the exhaust pipe 11, is convenient for The refrigerant of high temperature and pressure after compressor compresses is discharged, the discharge superheat for detecting compressor is provided at exhaust pipe 11 The detection components (not shown) of size.Preferably, which includes pressure sensor and temperature sensor, structure letter It is single, convenient for setting.Certainly, it in the other embodiments of the utility model, can also be detected using other wet detecting elements of heat The discharge superheat of compressor, as long as other modes of texturing under the design of the utility model, in the utility model Within protection scope.

Refrigerant pipe 60 in the present embodiment is copper pipe, is interference fit connection between the copper pipe and the second air entry 332, surely It is fixed reliable, certain sealing effect may be implemented.Further, the connection for being connect with the second air entry 332 of the copper pipe The periphery of section is provided with sealant (not shown).The sealant is zinc coat, and structure is simple, is easy to implement sealing effect.

Certainly, in the other embodiments of the utility model, copper pipe and can also be sealed using structures such as sealing rings Gap between two air entries 332, as long as other modes of texturing under the design of the utility model, in the utility model Protection scope within.

In order to avoid refrigerant pipe 60, it is provided with gap on the electric machine assembly 20 and upper flange 32 in the present embodiment, is pacified When dress, so that refrigerant pipe 60 is connect after extending from the top down in the gap with the second air entry 332.Preferably, electric machine assembly 20 include stator 21 and rotor 22, and in order to guarantee the steady running of electric machine assembly 20, the gap setting on electric machine assembly 20 is fixed On son 21.

Referring again to shown in Fig. 1 to Fig. 5, in a kind of preferred embodiment of the utility model, cylinder assembly 35 includes The lower end surface of first cylinder 351, the first cylinder 351 is bonded with the upper surface of lower flange 33, is provided with air-breathing on the first cylinder 351 Slot 3511 and the suction inlet 3512 being connected to suction tank 3511 are provided with outlet 334, suction tank 3511 and row on lower flange 33 334 connection of outlet.For structure in compared with the existing technology, the air suction structure in the present embodiment on the first cylinder 351 is by inhaling Air drain 3511 and the suction inlet 3512 being connected to suction tank 3511 composition, air-breathing is more smooth, can reduce first as much as possible The air-breathing angle of cylinder 351.To improve 351 capacity utilization of the first cylinder, the case where proof strength, suction tank 3511 and sucking Mouth 3512 is arranged as close as possible to the sliding vane groove of the first cylinder 351.

Certainly, in the other embodiments of the utility model, cylinder assembly 35 can also include two or more Cylinder, compressed convenient for carrying out multistage or multi-cylinder to refrigerant.

The diameter of refrigerant pipe 60 in the present embodiment isExtremelyIt is determined with specific reference to compressor displacement size, and with The discharge capacity of compressor increases, and caliber increases.Refrigerant pipe 60 enters 10 lower space of casing assembly by 21 gap of stator, cold in this way The heat of electric machine assembly 20 and high temperature refrigerant can be absorbed in matchmaker's pipe 60, and refrigerant is made to have certain degree of superheat, and refrigerant pipe 60 is logical The second air entry 332 for crossing lower flange 33 enters in the cavity 333 of lower flange 33.

Refrigerant pipe in order to improve absorption of the refrigerant pipe 60 to compressor internal heat in the present embodiment, in the present embodiment 60 include horizontal extension section 61 and vertical extended segment 62, and horizontal extension section 61 is located at the top of electric machine assembly 20, convenient for motor The refrigerant heat at the top of component 20 is absorbed, and vertical extended segment 62 is connect with horizontal extension section 61, and from electric machine assembly 20 Top extend to the lower section of electric machine assembly 20, convenient for the heat around electric machine assembly 20.

Preferably, the compressor in the present embodiment further includes variable frequency drives (not shown), the variable frequency drives with Detection components and the equal communication connection of control valve 50, when detection components detect the discharge superheat of compressor less than predetermined value, Variable frequency drives control control valve 50 and open；When detection components detect the discharge superheat of compressor not less than predetermined value, Variable frequency drives control control valve 50 and close.Preferably, control valve 50 is electrically-controlled valve, is easy to implement the automatic control to air-conditioning system System.

When actual installation, the control valve 50 in the present embodiment be can be set in the outside of the casing assembly 10, can also be with It is arranged in installation cavity, is preferably provided at the outside of casing assembly 10, is easily installed and controls.

Under normal circumstances, since control valve 50 is in off state, from control valve 50 to the second air entry of lower flange 33 332, because being connected using refrigerant pipe 60, can greatly increase compressor redundant gap volume, reduce refrigerant circulation, reduce compressor refrigeration Amount is provided with check valve at 332 position of the second air entry in refrigerant pipe 60 in the present embodiment to prevent this unfavorable phenomenon 110, only refrigerant is allowed to flow into lower flange 33, does not allow to flow backwards.

The working principle for specifically introducing the air-conditioning system in the present embodiment referring again to Fig. 1 to Fig. 6 is as follows:

Under normal circumstances, motor-driven valve is in off state, and comes out the refrigerant vapour of low-temp low-pressure by dividing from evaporator 80 Liquid device component 40 enters the first air entry 331 of lower flange 33, then passes through outlet 334, the first cylinder on lower flange 33 351 suction tank 3511, suction inlet 3512 are compressed, are vented into the first cylinder 351, the gaseous refrigerant warp of high temperature and pressure The condensation of condenser 70, the throttling of throttle valve 90 are crossed, evaporator 80 completes refrigeration cycle after evaporating.

Pressure sensor and temperature sensor are set at compressor exhaust pipe 11, when discharge superheat (i.e. delivery temperature The difference of saturation temperature corresponding with pressure at expulsion) be less than predetermined value when (discharge superheat is smaller, there are air-breathing with liquid can Can): 1. to variable frequency drives, variable frequency drives again feed back to signal electronic for pressure sensor and temperature sensor feedback signal Valve, motor-driven valve are opened, and part of refrigerant enters from 20 top of electric machine assembly, and refrigerant flows in copper pipe, and passes through stator 21 and the gap of upper flange 32 enter 10 lower space of casing assembly, gas-liquid mixed refrigerant charge electric machine assembly 20 and outer in copper pipe 10 upper pyrometer refrigerant heat of shell component makes the refrigerant vapor of gas-liquid two-phase state, with certain degree of superheat；② Enter lower flange 33, the refrigerant come in the first air entry 331 of lower flange 33 by the second air entry 332 of lower flange 33 It mixes, exchange heat in the cavity 333 of lower flange 33, improve the mass dryness fraction of refrigerant；3. on the other hand since lower flange 33 is located always In compression motor spindle oil sump, and oil sump temperature is higher than suction temperature, therefore can further inhale in the cavity of lower flange 33 333 Temperature in drains receptacle, further increasing refrigerant mass dryness fraction makes refrigerant have certain degree of superheat；4. having certain degree of superheat Refrigerant vapour enter the by the outlet 334 of lower flange 33, the suction tank 3511 of the first cylinder 351, suction inlet 3512 One cylinder 351 is compressed, and refrigeration cycle is completed in exhaust.

Motor-driven valve can be controlled by adjusting spool size and enter 60 suction inlet refrigerant flow of refrigerant pipe, and then be controlled Refrigerant superheat degree, after suction superheat improves, by refrigeration cycle principle it is found that compressor exhaust temperature can increase, in turn The compressor air-discharging degree of superheat is improved, after discharge superheat is not less than predetermined value, motor-driven valve is closed, and is so recycled, is finally reached To self-balancing.

In conclusion the utility model is automatically adjusted by motor-driven valve and in the setting air intake passage of upper flange 32 and in laxative remedy Blue 33 mixed modes make air-breathing self-balancing, and suction superheat has certain degree of superheat, reduces the risk of compressor liquid hammer, And then anti-slip limiting plate and roller are detached from, and improve compressor performance and reliability.

It can be seen from the above description that the above embodiments of the utility model achieve the following technical effects:

The compressor of utility model passes through the monitoring compressor air-discharging degree of superheat, when discharge superheat is less than predetermined value, electricity Dynamic valve is opened, and by spool size controller by refrigerant flow, refrigerant enters from motor epicoele, absorbs heat and improves The refrigerant suction degree of superheat, the refrigerant after overheat pass through the second air entry of lower flange, with the first air entry of lower flange into The refrigerant come is mixed in lower flange cavity, is exchanged heat, and refrigerant superheat degree is improved, according to refrigeration cycle principle, air-breathing After the degree of superheat increases, delivery temperature is increased, and after discharge superheat is greater than predetermined value, motor-driven valve is closed, and so circulation makes air-breathing Self-balancing simultaneously has certain degree of superheat, reduces the risk of compressor liquid hammer, and then anti-slip limiting plate and roller are detached from, and improve compressor Performance And Reliability.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (14)

1. a kind of compressor characterized by comprising

Casing assembly (10), the casing assembly (10), which is enclosed, to be set to form installation cavity；

Electric machine assembly (20), the electric machine assembly (20) are mounted in the installation cavity；

Pump assembly (30), the pump assembly (30) include crankshaft (31), upper flange (32), lower flange (33), lower cover plate (34) and cylinder assembly (35), the cylinder assembly (35) are set on the crankshaft (31), the electric machine assembly (20) with The crankshaft (31) is drivingly connected, and the upper flange (32) is set on the crankshaft (31) and is located at the cylinder assembly (35) Upper surface, the lower flange (33) is set on the crankshaft (31) and is located at the lower end surface of the cylinder assembly (35), institute The lower end surface that lower cover plate (34) lid is located at the lower flange (33) is stated, the lower flange (33) is away from the cylinder assembly (35) Side is provided with cavity (333), is provided with the first air-breathing being connected to the cavity (333) on the side wall of the lower flange (33) Mouth (331) and the second air entry (332)；

Dispenser component (40), the dispenser component (40) are arranged in the outside of the casing assembly (10), the dispenser The outlet conduit (41) of component (40) is connect with first air entry (331)；

The inlet duct (42) of refrigerant pipe (60), the first end of the refrigerant pipe (60) and the dispenser component (40) or institute State outlet conduit (41) connection, the second end of the refrigerant pipe (60) extended downwardly above the electric machine assembly (20) and with Second air entry (332) connection；

Control valve (50), the control valve (50) are arranged on the refrigerant pipe (60) according to the discharge superheat of the compressor Spend the aperture that size controls the refrigerant pipe (60).

2. compressor according to claim 1, which is characterized in that be provided with exhaust pipe at the top of the casing assembly (10) (11), the detection components of the discharge superheat size for detecting the compressor are provided at the exhaust pipe (11).

3. compressor according to claim 2, which is characterized in that the detection components include that pressure sensor and temperature pass Sensor.

4. compressor according to claim 1, which is characterized in that the refrigerant pipe (60) is copper pipe, the copper pipe and institute State the connection of the second air entry (332) interference fit.

5. compressor according to claim 1, which is characterized in that the refrigerant pipe (60) is used for and second air entry (332) periphery of the linkage section connected is provided with sealant.

6. compressor according to claim 5, which is characterized in that the sealant is zinc coat.

7. compressor according to claim 1, which is characterized in that the diameter of the refrigerant pipe (60) isExtremely

8. compressor according to claim 1, which is characterized in that the refrigerant pipe (60) include horizontal extension section (61) and Vertical extended segment (62), the horizontal extension section (61) are located at the top of the electric machine assembly (20), the vertical extended segment (62) it is connect with the horizontal extension section (61), and extends to the electric machine assembly (20) above the electric machine assembly (20) Lower section after connect with second air entry (332).

9. compressor according to claim 1, which is characterized in that on the electric machine assembly (20) and the upper flange (32) It is provided with the gap for avoiding the refrigerant pipe (60).

10. compressor according to claim 1, which is characterized in that the refrigerant pipe (60) is close to second air entry (332) check valve (110) are provided at position.

11. compressor according to claim 2, which is characterized in that the compressor further includes variable frequency drives, the change Frequency driver and the detection components and the control valve (50) equal communication connection, when the detection components detect the compression When the discharge superheat of machine is less than predetermined value, the variable frequency drives control the control valve (50) and open；When the detection group When part detects the discharge superheat of the compressor not less than the predetermined value, the variable frequency drives control the control valve (50) it closes.

12. compressor according to claim 1, which is characterized in that the control valve (50) is electrically-controlled valve.

13. compressor according to any one of claim 1 to 12, which is characterized in that the cylinder assembly (35) includes The lower end surface of first cylinder (351), first cylinder (351) is bonded with the upper surface of the lower flange (33), and described first The suction inlet (3512) for being provided with suction tank (3511) on cylinder (351) and being connected to the suction tank (3511), the laxative remedy It is provided with outlet (334) on blue (33), the suction tank (3511) is connected to the outlet (334).

14. a kind of air-conditioning system, including compressor, which is characterized in that the compressor is any one of claims 1 to 13 institute The compressor stated.