CN205779705U - Scroll compressor and compressor system - Google Patents

Abstract

The utility model relates to a scroll compressor (200), include: a housing (210) defining an oil sump (218) therein; a rotating shaft (220); a motor (230); and a scroll mechanism (240) driven by the motor through the rotary shaft. Wherein the scroll compressor further includes a cooling section (250, 280, 290a) that cools the oil sump, the cooling section allowing cooling fluid from outside the housing to flow therethrough. According to the utility model discloses a scroll compressor can improve the heat management of compressor, reduces the superheat degree of breathing in, and the reinforcing is to the cooling of movable part, especially motor.

Description

Screw compressor and compressor assembly

Technical field

This utility model relates to a kind of screw compressor and a kind of compressor assembly including this screw compressor.

Background technology

This section aims to provide the background technology relevant to this utility model, and it is not necessarily prior art.

Conventional compressor assembly includes refrigeration system (such as refrigeration air-conditioner/fridge etc.) and heat pump (example Hot water units etc. as cooling/heating air conditioner/winter heating).Compressor assembly generally includes compressor, condenser, throttling dress Putting and vaporizer, they are sequentially connected to form refrigerant loop.Wherein compressor is frequently with screw compressor.

Screw compressor generally comprises: housing；Rotary shaft；Motor, motor includes the stator being fixed to housing and is fixed to The rotor of rotary shaft；And vortex mechanism, vortex mechanism is driven by rotary shaft, and compresses cold-producing medium.Generally motor arrangement is existed The compressor in the low pressure refrigerant district before compression is referred to as low-pressure side formula compressor, and by motor arrangement high-pressure refrigeration upon compression The compressor in agent district is referred to as high-pressure side formula compressor.Owing to the movable part such as motor, bearing generates heat in the course of the work, and overheated It can be caused to damage, so both compressors are required for cooling down movable part.For low-pressure side formula compressor, The low-temperature refrigerant entered from the air inlet of housing is used to cool down motor, cooling oil and associated friction secondary, then cold-producing medium The entrance being inhaled into vortex mechanism is compressed.For the formula compressor of high-pressure side, carry out the superheated refrigerant of flash-pot Being directly entered vortex mechanism, movable part is cooled down by the High Temperature High Pressure aerofluxus after overcompression.

On the one hand, the application of northern heating need compressor assembly can provide high water temperature to replace old boiler, low ring The requirement of border temperature high water temperature make compressor high condensation temperature, high pressure ratio operating mode under work.

On the other hand, for the requirement in terms of environmental protection, it is increasingly using environmental protection refrigerant (such as R32), but and mesh Front conventional cold-producing medium is compared, and under identical operating mode, the delivery temperature using environmental protection refrigerant is higher, the heat pipe to compressor Reason, the especially cooling of movable part are had higher requirement.

In the above case, the heat management of above two compressor all there is problems in that in low evaporating temperature, high condensation Under the limiting condition of temperature, the cooling to movable parts such as motors is not enough, and easily because movable part is to the heating of cold-producing medium Cause suction superheat, affect volumetric efficiency.

Utility model content

A purpose of the present utility model is to solve at least one in problem described above, i.e. improves at limiting condition Under cooling to movable parts such as motors, and reduce suction superheat, improve volumetric efficiency.

According to an aspect of the present utility model, it is provided that a kind of screw compressor, including: housing, housing defines Oil sump；Rotary shaft；Motor；And vortex mechanism, vortex mechanism is driven by rotary shaft by motor.Wherein, screw compressor is also Including the cooling end cooling down oil sump, cooling end allows the cooling fluid from hull outside to flow through cooling end.

Alternatively, rotary shaft is provided with at least one cooling oil duct connected with oil sump, cooling oil duct with motor Corresponding precalculated position is provided with at least one oil outlet.

Alternatively, rotary shaft is provided with a cooling oil duct, and cooling oil duct is provided with corresponding with the first end of motor First oil outlet and second oil outlet corresponding with the second end of motor, the position of the first oil outlet and the second oil outlet is arranged The rotor making the oil leaving these oil outlets can cross motor is become directly to contact the stator of motor.

Alternatively, one end contrary with oil sump of cooling oil duct is to close.

Alternatively, being additionally provided with the oil leab connected with oil sump in rotary shaft, oil leab leads to supporting rotating shaft Base bearing and/or drive vortex mechanism driving bearing.

Alternatively, in the case of being provided with a cooling oil duct, cooling oil duct is formed by same oil duct with oil leab； In the case of being provided with more than one cooling oil duct, the one in cooling oil duct is formed by same oil duct with oil leab.

Alternatively, screw compressor is high-pressure side formula compressor.

Alternatively, screw compressor is low-pressure side formula compressor, and the air inlet of the housing of screw compressor is arranged close to The entrance of vortex mechanism.

Alternatively, screw compressor is provided with air inlet guide member, and air inlet guide member limits passage, the entrance of passage and shell The air inlet next-door neighbour of body, the outlet of passage is close to the entrance of vortex mechanism.

Alternatively, vortex mechanism includes dynamic scroll and determines scroll, and air inlet guide member is fixed to determine scroll.

Alternatively, cooling end is formed by the coil pipe being arranged in oil sump.

Alternatively, cooling end is formed by additional shell portion, additional shell portion screw compressor housing be provided with oil sump The external stability at position is to the housing of screw compressor so that oil sump can be cooled down by cooling fluid across housing.

Alternatively, cooling fluid is water or cold-producing medium.

Alternatively, screw compressor also includes pump and the heat abstractor being arranged on the outside of housing, cooling end, pump and heat radiation Device connects to each other to form cooling circuit, and pump drives cooling fluid to circulate in cooling circuit.

Alternatively, screw compressor also includes the heat-pipe radiator running through housing, and heat-pipe radiator includes being arranged in oil sump Interior evaporator section and the condensation segment being arranged in outside the housing of compressor, evaporator section forms cooling end.

This utility model additionally provides a kind of compressor assembly, including being sequentially connected with to be formed the compression of refrigerant loop Machine, condenser, throttling arrangement and vaporizer, wherein, compressor is compressor as above.

Alternatively, compressor assembly is used as heat pump.

Alternatively, cooling fluid is from the cold-producing medium between throttling arrangement and vaporizer or to come flash-pot and compression Cold-producing medium between machine.

Alternatively, cooling fluid is water, and water is being heated by the condenser of compressor assembly after cooling end.

Alternatively, the fan of vaporizer is towards condensation segment air blast.

Advantage according to screw compressor of the present utility model is, the oil after being cooled down by employing cools down motor, changes It is apt under limiting condition the cooling to motor, and suction superheat can have been reduced, improve volumetric efficiency.

Accompanying drawing explanation

By description referring to the drawings, feature and advantage of the present utility model will become better understood by.Accompanying drawing It is not necessarily drawn to scale, and for clarity, some part may be eliminated.

Fig. 1 is the profile that can apply low-pressure side formula screw compressor of the present utility model, and its cutting plane runs through air inlet Mouth and air vent.

Fig. 2 is the profile that can apply high-pressure side of the present utility model formula screw compressor, and its cutting plane runs through air inlet Mouth and air vent.

Fig. 3 is similar with Fig. 1 but applies the profile of low-pressure side formula screw compressor of the present utility model, wherein, by Coil pipe forms cooling end.

Fig. 4 is the top view observed above coil pipe in figure 3.

Fig. 5 shows the rough schematic view of compressor and cooling circuit.

Fig. 6 shows air inlet guide member and determines the axonometric chart that scroll fits together.

Fig. 7 is the axonometric chart of air inlet guide member.

Fig. 8 is the axonometric chart determining scroll.

Fig. 9 is air inlet guide member and determines the profile that scroll fits together.

Figure 10 shows the profile of the additional housing forming cooling end.

Figure 11 is the rough schematic view of compressor assembly, and wherein, the cold-producing medium after throttling arrangement enters cooling end, makees For cooling fluid.

Figure 12 is the rough schematic view of compressor assembly, and wherein, the cold-producing medium after vaporizer enters cooling end, as Cooling fluid.

Figure 13 is the rough schematic view of heat pump, wherein, as cooling fluid water after cooling end by condensing Device heats.

Figure 14 is the rough schematic view of compressor assembly, wherein, uses heat-pipe radiator to form cooling end.

Detailed description of the invention

Description related to the preferred embodiment is the most exemplary below, and be definitely not this utility model and application thereof or The restriction of usage.

Fig. 1 shows the example of known low-pressure side formula screw compressor with the cross section running through air inlet and air vent.As Shown in Fig. 1, low-pressure side formula screw compressor 1 is vertical compressor, and it specifically includes that housing 10, rotary shaft 20, motor 30 and whirlpool Rotation mechanism 40, is described below in detail these parts.

It is provided with dividing plate 12 in the housing 10, is separated into low-pressure area (below dividing plate 12 with the inner space by housing 10 Space) and higher-pressure region (space above dividing plate 12).For low-pressure side formula compressor 1, motor 30 and vortex mechanism 40 are all Accommodate in a low-voltage region.Housing is provided with air inlet 14 and air vent 16, is respectively used to suck cold-producing medium and discharge compression After cold-producing medium, wherein, cold-producing medium is incorporated in the inner space of housing 10 by air inlet 14.Limit in the bottom of housing 10 Oil sump 18, accumulates lubricating oil due to action of gravity in oil sump 18.

Rotary shaft 20 (is not shown via bearing with the main bearing seat 24 being positioned at upper end by the step 22 being positioned at lower end Go out) rotatably support.The lower end of rotary shaft 20 is immersed in oil sump 18, is provided with fuel feeding portion 26 in rotary shaft 20 With oil leab 28, specifically, fuel feeding portion 26 includes concentric holes 26a being positioned at the bottom of rotary shaft 20 and is arranged on concentric holes Oil pump 26b in 26a, oil pump 26b are immersed in oil sump 18, and the oil fork that such as can be affixed to rotary shaft 20 (is illustrated in Fig. 1 Draw to property) or impeller pump, when rotary shaft 20 rotates, oil pump 26b rotates with rotary shaft 20, thus by concentric holes 26a Oil is pumped up in oil leab 28.Certainly, oil pump 26b can also be other type, as long as can be pumped up i.e. by oil Can.Oil leab 28 is eccentric relative to rotary shaft 20, connects with concentric holes 26a, and substantially axial extension, in rotary shaft 20 Under centrifugal action, the oil in oil leab 28 continues up, and upper from oilhole 20a radially and rotary shaft 20 End 20b leaves rotary shaft 20.The position of oilhole 20a is corresponding with main bearing seat 24, therefore leaves the oil of oilhole 20a Can hold by lubricating spindle.The oil left from the upper end 20b of rotary shaft 20 can lubricate vortex mechanism 40 and driving bearing (below To describe), and flow down to lubricate on motor 30 motor 30.

Motor 30 includes the stator 32 being fixed to housing 10 and is fixed to the rotor 34 of rotary shaft 20, with via rotary shaft 20 Drive vortex mechanism 40.

Vortex mechanism 40 include being fixed to the dynamic scroll 42 of rotary shaft 20 and be fixed to housing 10 determine scroll 44, two Person is intermeshed by cross slip-ring coupling (not shown), limits a series of compression chamber between.Determine scroll The 44 entrance 40a limiting vortex mechanism 40 and outlet 40b, entrance 40a are connected with compression chamber respectively with outlet 40b.Rotate The upper end of axle 20 is formed with cam pin 20c, cam pin 20c and is inserted into form driving bearing in the hub portion 42a of dynamic scroll 42, When rotary shaft 20 rotates, cam pin 20c drive dynamic scroll 42 around determining scroll 44 moving so that the volume of compression chamber from It is gradually reduced in arriving outward, thus the cold-producing medium that entrance 40a sucks is compressed, and by the cold-producing medium after compression from outlet 40b It is discharged to the higher-pressure region above dividing plate 12, and leaves compressor from air vent 16.

From described above it can be seen that housing 10 can be diffused into from the low-temperature refrigerant of air inlet 14 entrance of housing 10 Inner space, thus motor 30, main bearing seat 24 and driving bearing (they all generate heat because of spin friction) are cooled down. Thus, before entering vortex mechanism 40, cold-producing medium is heated so that the overheated of cold-producing medium that vortex mechanism 40 sucks is spent Height, on the one hand this reduce the volumetric efficiency of compressor, on the other hand improve delivery temperature.Simultaneously as inspiratory airflow is not Easily management so that the temperature distributing disproportionation of motor is even, low evaporating temperature, high condensation temperature limiting condition under, the highest temperature Degree can exceed the permission upper limit.

For solving motor cooling and the problem of excessive discharge temperature, can come by the way of compressor a small amount of absorbing gas belt liquid Solve, specifically, carry out the mechanisms such as motor are cooled down by the evaporation of liquid refrigerant, without improving suction superheat Degree.But at present in compressibility for air-breathing return liquid accurately control acquire a certain degree of difficulty, especially for EVI (air injection enthalpy-increasing) System, delivery temperature is controlled by EVI, returns hydraulic control system more difficult.The heating performance of system can be caused by too much time liquid Adverse effect, simultaneously can dilute lubricating oil, cause the integrity problem of lubricating system.

Fig. 2 shows the example of known high-pressure side formula screw compressor.As in figure 2 it is shown, high-pressure side formula screw compressor 100 is also vertical compressor, and it specifically includes that housing 110, rotary shaft 120, motor 130 and vortex mechanism 140, in detail below These parts are described.The structure similar to above low-pressure side formula compressor 1 is represented (with 1 as prefix) by similar reference.

For high-pressure side formula compressor 100, the inner space of housing 110 substantially all in compression after higher-pressure region, I.e. motor 130 and vortex mechanism 140 is all contained in higher-pressure region.Housing is provided with air inlet 114 and air vent 116, point Cold-producing medium after Yong Yu not sucking cold-producing medium and discharging compression.Specifically, air inlet 114 is arranged on the top of housing 110, and And it being directly communicated to the entrance 140a of vortex mechanism 140 so that the cold-producing medium entered from air inlet 114 is directly entered vortex mechanism 140, and be not leak in the inner space of housing 110.Oil sump 118 is limited, due to action of gravity in the bottom of housing 110 Lubricating oil is accumulated in oil sump 118.

Rotary shaft 120 by be positioned at lower end step 122 and be positioned at the main bearing seat 124 of rotary shaft upper end via Bearing (not shown) rotatably supports.The lower end of rotary shaft 120 is immersed in oil sump 118, sets in rotary shaft 120 It is equipped with fuel feeding portion 126 and oil leab 128 (cannot observe in profile, the most shown in broken lines).Specifically, fuel feeding portion 126 include concentric holes 126a being positioned at the bottom of rotary shaft 120 and the pipeline 126b connected with concentric holes 126a, pipeline 126b's The other end is immersed in oil sump 118.Owing to the pressure in oil leab 128 is less than internal pressure (the i.e. oil sump 118 of housing 110 In pressure), so the oil in oil sump 118 by under the effect of pressure differential by pipeline 126b be upwardly into concentric holes 126a with And in oil leab 128.It is of course also possible to use other type of fuel system.Oil leab 128 is relative to rotary shaft 120 Bias, connects with concentric holes 126a, and substantially axial extension, under the centrifugal action of rotary shaft 120, enters oil leab The oil of 128 continues up, and leaves rotation from the upper end 120b of rotary shaft 120 (and alternatively, oilhole radially) Rotating shaft 120, to lubricate the moving component in driving bearing (being described below), vortex mechanism 140 and main bearing seat 124.

Motor 130 includes the stator 132 being fixed to housing 110 and is fixed to the rotor 134 of rotary shaft 120, to drive rotation Rotating shaft 120.

Vortex mechanism 140 include being fixed to the dynamic scroll 142 of rotary shaft 120 and be fixed to housing determine scroll 144, The two is intermeshed by cross slip-ring coupling (not shown), limits a series of compression chamber between.Determine vortex Part 144 limits the entrance 140a of vortex mechanism 140 and is connected with compression chamber respectively with outlet 140b with outlet 140b, entrance 140a Logical.The upper end of rotary shaft 120 be formed cam pin 120c, cam pin 120c be inserted in the hub portion 142a of dynamic scroll 142 with Form driving bearing, when rotary shaft 120 rotates, cam pin 120c drive dynamic scroll 142 around determining scroll 144 moving, with The volume making compression chamber is gradually reduced from outside to inside, thus is compressed by the cold-producing medium that entrance 140a sucks, and will compression After cold-producing medium discharge the higher-pressure region within housing 110 from outlet 140b, then leave compressor from air vent 116.

From described above it can be seen that motor 130 entirety is all in pressure at expulsion district, owing to delivery temperature is usually less than horse Reach the temperature of 130, so, motor 130 is carried out cold by the high-temperature high-pressure refrigerant discharged from the outlet 140b of vortex mechanism 140 But.Low evaporating temperature, high condensation temperature limiting condition under, higher exhaust gas temperature is difficult to meet motor cooling requirement.It addition, Vortex mechanism 140 entirety is all enclosed in delivery temperature environment, and the cold-producing medium sucking vortex mechanism 140 can be entered by high-temperature exhaust air Row heating, this will also result in suction superheat, affects volumetric efficiency.

In order to solve motor cooling and the problem of discharge superheat, this utility model provides the brand-new motor type of cooling. Specifically, this utility model non-used cold-producing medium cooling motor, but utilize the lubricating oil after cooling to cool down motor.Under Face describes according to low-pressure side formula screw compressor 200 of the present utility model with reference to Fig. 3.Fig. 3 shows at low-pressure side formula scroll compression The improvement carried out on the basis of contracting machine 1, therefore, section components is similar with the reference of above screw compressor 1 by using Labelling (with 2 as prefix), and by the descriptions thereof are omitted.

As it is shown on figure 3, similar with above description, low-pressure side formula screw compressor 200 includes: housing 210, it has air inlet Mouth 214, air vent 216, and in housing, define oil sump 218；Rotary shaft 220；Motor 230, it includes being fixed to housing 210 Stator 232 and be fixed to the rotor 234 of rotary shaft；And vortex mechanism 240, it is driven by rotary shaft 220, and compresses refrigeration Agent.Concrete structure about motor 230 and vortex mechanism 240 sees above to the motor 20 in screw compressor 1 and scroll machine The description of structure 40.

In the oil sump 218 of screw compressor 200, i.e. at the near-bottom of housing 210, it is provided with coil pipe 250 as cold But portion, the inner space of coil pipe 250 is opened with oil sump 218 isolation, to allow the cooling fluid in coil pipe 250 via coil pipe 250 Wall carries out heat exchange with the oil in oil sump 218.Coil pipe 250 is such as made up of Heat Conduction Materials such as copper, and reciprocal in oil sump 218 Turning back repeatedly to increase heat exchange area, see Fig. 4, coil pipe 250 has entrance 250a and outlet 250b through housing 210.Outward The cooling fluid that the temperature in portion is relatively low can enter coil pipe 250 from entrance 250a, is carrying out heat exchange with the oil in oil sump 218 After (specifically, absorb the heat of oil), leave coil pipe 250 from outlet 250b." temperature is relatively low " described herein refers to low The temperature of the oil in oil sump 218, thus, reduces the oily temperature in oil sump 218.

Outside cooling fluid can be water or cold-producing medium.See Fig. 5, can be by the entrance 250a of coil pipe 250 and outlet 250b is connected to cooling circuit.In addition to coil pipe 250, this cooling circuit also includes pump 260 and heat abstractor 262, and pump 260 drives Cooling fluid circulates in cooling circuit, and the heat that cooling fluid absorbs in oil sump is shed by heat abstractor 262.Such as For the operating mode of low-temperature heating, owing to ambient temperature is low, easily by heat abstractor 262 is exposed to environment and easily Realize the cooling (or heat radiation) of cooling fluid.Such as, heat abstractor 262 in the coil pipe being shaped like with coil pipe 250, or can be appointed The what heat abstractor of its form.Thus, the sub-cooled fluid after heat radiation returns to continue in coil pipe 250 heat absorption, completes cooling The circulation of fluid.

With continued reference to Fig. 3, in rotary shaft 220, it is also equipped with the fuel feeding portion 226 similar with screw compressor 1 and profit Grease way 228, specifically, fuel feeding portion 226 includes concentric holes 226a being positioned at the bottom of rotary shaft 220 and is arranged in concentric holes Oil pump 226b.Oil leab 228 is eccentric relative to rotary shaft 220, connects with concentric holes 226a, and substantially axial extension. The oil moved upward in oil leab 228 leaves rotation from the upper end 220b of oilhole 220a radially and rotary shaft 220 Rotating shaft 220.The position of oilhole 220a is corresponding with main bearing seat 224, and the oil therefore leaving oilhole 220a can moisten Sliding base bearing.The oil left from the upper end 220b of rotary shaft 220 can lubricate vortex mechanism 240 and driving bearing, and to dirty Move and on motor 230, lubricate motor 230.

Owing to the oil in oil sump 218 is cooled, so when oil is pumped into oil leab 228 and is supplied to axle further Hold, the movable part such as motor time, oil can reduce the temperature of each movable part.Additionally, the temperature of oil reduces is favorably improved profit The reliability of sliding system.

Rotary shaft 220 is also provided with cooling oil duct 229.Cooling oil duct 229 also leads to concentric holes 226a, it is thus possible to Enough receive the oil pumped by oil pump 226b.Cooling oil duct 229 is eccentric also relative to rotary shaft 220, and substantially axial extension.Cold But oil duct 229 is provided with at least one oil outlet in the pre-position corresponding with motor 230.Specifically, cooling oil duct 229 It is provided with the first oil outlet 229a corresponding with the upper end of motor 230 (the first end) and right with the bottom of motor (the second end) The the second oil outlet 229b answered.The position of first and second oil outlet 229a, 229b is set such that leaves these oil outlets Oil can be crossed rotor 234 and directly contact stator 232, thus lubricates the upper and lower of motor 230 respectively.Specifically, One oil outlet 229a is arranged to the upper end of slightly above rotor 234, owing to the upper end of stator 232 is higher than the upper end of rotor 234, so The oil leaving the first oil outlet 229a can directly be thrown on stator 232.Second oil outlet 229b is arranged to face to rotor 234 Gap between rotor tooth, so that the oil leaving the second oil outlet 229b also is able to directly be thrown on stator 232.Can manage Solving, the first oil outlet 229a can also be towards the gap between rotor tooth.

The respective oil pump capacity of the two oil outlet is controlled by the size of two oil outlet 229a and 229b of design.Cooling The upper end of oil duct 229, i.e. with oil sump the most contrary one end can be blocked, to guarantee that all of oil all supplies to fuel-displaced Hole 229a and 229b.

Alternatively, cooling oil duct 229 and oil leab 228 can be formed by same oil duct, i.e. can be at oil leab On 228, precalculated position corresponding with motor 230 increases at least one (such as two) oil outlet, to realize the function of cooling oil duct.

Alternatively it is also possible to arrange two cooling oil duct (not shown), wherein the first cooling oil duct is provided with and rotor The first oil outlet that first end is corresponding, and the second cooling oil duct is provided with second oil outlet corresponding with the second end of rotor.This One in two cooling oil ducts can be formed by same oil duct with oil leab 228, i.e. can increase on oil leab 228 Add a cooling oil outlet.

It will be appreciated that, it is also possible to more oil outlet or more cooling oil duct are set as desired, and cool down oil One or more in road can be formed by same oil duct with oil leab.

Cool down the oil in oil sump 218 by cooling end 250, and by arrange cooling oil duct 229 and oil outlet 229a, 229b, it is possible to realize the oil after utilizing cooling and cool down motor 250.Owing to the coefficient of heat transfer of oil is better than the heat exchange of gaseous refrigerant Coefficient, compared with prior art, it is possible to more greatly reduce the temperature of motor 250.Further, since utilize rotary shaft 220 Rotate and uniformly in the circumferential direction oil is thrown on stator 232, so compared with prior art, it is possible in a more uniform way Cooling motor 250, it is to avoid hot-spot occurs.Further, due to oil be cooled in outside compressor realize independently, so oil Temperature will not be affected by the operating mode of compressor, even if when under compressor operating is at limiting condition, it is also possible to motor is cold But arrive in permission temperature range.

Although describing this utility model theory above by reference to Fig. 3 similar with Fig. 1 to be applied to low-pressure side formula scroll compression The embodiment of machine, it should be appreciated that the type of cooling of the present utility model, including oil leab and cooling end, it is also possible to It is applied to the high-pressure side formula screw compressor shown in Fig. 2.

Modification one

See Fig. 3 and Fig. 9, can set between air inlet 214 and the entrance 240a of vortex mechanism 240 in housing 210 Put air inlet guide member 270.This air inlet guide member 270 limits passage 272, direct with the cold-producing medium that will enter from air inlet 214 It is directed to the entrance 240a of vortex mechanism 240.

As shown in Figures 6 to 9, the side adjacent with housing 210 of air inlet guide member 270 has and matches with housing 210 Shape so that the entrance 272a of passage 272 is close to the air inlet 214 of housing 210.Air inlet guide member 270 and scroll machine The side that structure 240 is adjacent has the shape matched with vortex mechanism 240, so that the outlet 272b of passage 272 and scroll machine The entrance 240a next-door neighbour of structure.With reference to Fig. 6, air inlet guide member 270 can be fixed to vortex mechanism 240 by securing member F such as bolts Determine scroll 244.

Thereby, it is possible to the cold-producing medium reducing entrance air inlet 214 further leaks into outside the entrance 240a of vortex mechanism (i.e. leaking in the inner space of housing 210) is also heated by movable parts such as motors, thus reduces air-breathing mistake further Temperature, improves volumetric efficiency.In addition it is possible to solution problems with: in existing low-pressure side formula screw compressor, due to Free diffusing in housing, the cold-producing medium of flowing mix with the lubricating oil in housing and cause entry into the cold-producing medium of vortex mechanism and be mingled with There is substantial amounts of oil so that the oil recycle ratio of system is too high.In this utility model, cold-producing medium does not mixes with the oil in housing, because of This reduces system oil cycling rate, improves the heat exchange efficiency of system.

It is understood that the most do not carry out close between air inlet guide member 270 and air inlet 214 and vortex mechanism entrance 240a Envelope, therefore, it is allowed to a small amount of cold-producing medium circulates between air inlet guide member 270 and housing 210, maintains passage 272 and housing Pressure balance between the inner space of 210.

Modification two

In addition to coil pipe 250, it is also possible to the cooling end of other form is set.With reference to Figure 10, it illustrates by additional shell portion 280 form cooling end.Additional housing 280 fixing (such as welding) bottom to compressor housing 210, i.e. oil sump institute hermetically In the outside at position, thus between additional housing 280 and compressor housing 210, define cooling fluid cavity 282.Additional housing 280 are provided with entrance 280a and outlet 280b to allow outer low temperature fluid to enter and leave cooling fluid cavity 282.By across The compressor housing 210 at oil sump position carries out heat exchange, and the relatively low external fluid of temperature can absorb the heat of the oil in oil sump 218 Amount.

The entrance 280a of additional housing 280 and outlet 280b can be with the entrance 250a and outlet 250b phase with coil pipe 250 Same mode is connected to include pump 260 and the external cooling circuit of heat abstractor 262, and dispels the heat in the same way, at this Will not be repeated again.

By arranging additional housing 280, it is possible to realize the effect similar with coil pipe 250.In addition, with coil pipe 250 phase Ratio, arranging of additional housing 280 is simpler, it is not necessary to perforate on compressor housing 210 so that coil pipe passes, therefore, it is possible to Reduce processed complex degree.

Modification three

Preferably, single cooling circuit can not be used, but utilize the cold-producing medium of circulation in compressor assembly to make For cooling fluid.See Figure 11, compressor assembly P and include being sequentially connected with to be formed the screw compressor 200 of closed circuit, condensation Device C, throttling arrangement V and vaporizer E.Figure schematically show only these parts, and eliminate can in compressor assembly Other parts that can exist, such as gas-liquid separator, filter etc..Condenser C, throttling arrangement V and vaporizer E show with using There is known device, be therefore not described in detail its structure and operation principle.Figure shows the stream of cold-producing medium with solid arrow Dynamic direction.

Being from the different of compressor assembly P of prior art, its closed circuit is arranged so that at cold-producing medium through supercool After condenser C and throttling arrangement V, enter before vaporizer E, through cooling end (schematically show coil pipe 250 herein, but It is readily adaptable for use in additional housing 280).Thus, in throttling arrangement V, throttling becomes the system of the gas-liquid mixture phase of low-temp low-pressure Cryogen can absorb the heat of the oil in oil sump 218 and reduce oil temperature.This mode can utilize the cold-producing medium in system to drop Low oil temperature, in order to cooling motor 230, simple in construction, eliminates the pump 260 in above-mentioned embodiment and heat abstractor 262.

Similarly, Figure 12 is seen, it is also possible to closed circuit is arranged in cold-producing medium after vaporizer E, entrance pressure Contracting machine 200 advance into cooling end (such as coil pipe 250 or additional housing 280).Owing to entering the cold-producing medium temperature before compressor 200 Spend relatively low (possibly even containing liquid), the most also can reduce oil temperature, in order to cooling motor 230.

Modification four

See Figure 13, compressor assembly P and include being sequentially connected with to be formed the screw compressor 200 of closed circuit, condenser C, throttling arrangement V and vaporizer E.This compressor assembly P is used as heat pump, specifically, is used as to utilize condenser to water Carry out the Hot water units heated.In the case, water to be heated is incorporated in cooling end as cooling fluid.With reality in figure Line arrow shows refrigerant flow direction, and shows the flow direction of water with dotted arrow.Specifically, water loop is designed so that water After cooling end (such as coil pipe 250 or additional housing 280), heat the condenser C of compressor assembly P, to provide heat Water.Thus, can not only utilize water to reduce oil temperature be beneficial to cool down motor 230, additionally it is possible to water is preheated, improves compression Water temperature after the heating of machine system P.

Modification five

Figure 14 illustrates and form cooling end by heat-pipe radiator 290.Although Figure 14 with Figure 11 illustrates similarly Each critical piece of compressor assembly P, identical parts are by identical reference instruction, and will not be described in great detail.Heat Tube radiator 290 make use of heat pipe principle, transmits heat by the evaporation of the liquid in Totally enclosed vacuum pipe with condensing, tool There is high thermal conductivity.One end of heat-pipe radiator 290 is arranged in oil sump 218, and as evaporator section 290a, it absorbs oil sump 218 In heat, constitute cooling end of the present utility model.It is outside that the other end of heat-pipe radiator 290 is arranged on compressor 200, as Condensation segment 290b, it outwardly distributes heat.As required, can arrange between evaporator section 290a and condensation segment 290b with outer The adiabatic section (not shown) of boundary's thermal isolation.

When evaporator section 290a is heated, the liquid carburation by evaporation in the central conduit of heat-pipe radiator 290, steam is small Pressure reduction under flow to condensation segment 290b, outwardly release heat and condense into liquid, liquid leans on along the porous material of heat pipe inner wall again Capillarity flows back to evaporator section 290a, so circulates, and heat is reached condensation segment 290b by evaporator section 290a continuously.

Such as Figure 14 schematically, condensation segment 290b can be provided with multiple radiating fin 290c to increase heat-transfer surface Long-pending, improve heat transfer effect.Furthermore it is also possible to optionally arrange fan 292 to improve heat transfer effect further.This fan 292 Can be separately provided, it is possible to use be arranged on the fan of the vaporizer E of upstream of compressor.Owing to vaporizer E generally and compresses Machine 200 is adjacently positioned, therefore can arrange fan 292 easily so that it is simultaneously to vaporizer itself and heat-pipe radiator 290 Condensation segment 290b air blast.

Although embodiment of above and modification describe present inventive concept as a example by low-pressure side formula screw compressor 200, but It is it is understood that in addition to modification one, above-mentioned embodiment and modification two to five all can be applied to high-pressure side formula vortex Compressor 100 (high-pressure side formula compressor inherently direct air-breathing, therefore without using air inlet guide member).For high-pressure side formula Compressor, these embodiments also are able to provide similar advantage with modification, for instance, it is possible to preferably cool down motor, even if It also is able under limiting condition ensure that the temperature of motor is in allowed band；And owing to the temperature of movable part reduces, so The heating of the movable part cold-producing medium to sucking can also be reduced, reduce suction superheat, improve volumetric efficiency.

It addition, in the case of feasible, can be used in combination in above-mentioned each modification two or more.For example, it is possible to It is used in combination air inlet guide member 270 and additional housing 280 or heat-pipe radiator 290, and this compressor also is able to for hot water Unit.

All carry out for vertical compressor although described above, but above-mentioned embodiment and modification can also apply to crouch Formula compressor, and it is obtained in that same benefit.

Although described various embodiment of the present utility model and modification in detail at this, it should be appreciated that this practicality is new Type is not limited to the detailed description of the invention describing in detail here and illustrating, without departing from spirit and scope of the present utility model In the case of may be effected by one skilled in the art other modification and variant.All these modification and variant both fall within this practicality In novel scope.And, all components described here can be replaced by the component of equivalent in other technologies.

Claims (20)

1. a screw compressor (200), including: housing (210), described housing defines oil sump (218)；Rotary shaft (220)；Motor (230)；And vortex mechanism (240), described vortex mechanism is driven by described rotary shaft by described motor,

It is characterized in that, described screw compressor also includes the cooling end (250,280,290a) cooling down described oil sump, Described cooling end allows the cooling fluid from described hull outside to flow through described cooling end.

Screw compressor the most according to claim 1, it is characterised in that be provided with in described rotary shaft and described oil sump At least one cooling oil duct (229) of connection, described cooling oil duct is provided with at least in the precalculated position corresponding with described motor One oil outlet (229a, 229b).

Screw compressor the most according to claim 2, it is characterised in that described rotary shaft is provided with a cooling oil duct (229), described cooling oil duct be provided with first oil outlet (229a) corresponding with the first end of described motor and with described horse The second oil outlet (229b) that the second end that reaches is corresponding, the position of described first oil outlet and the second oil outlet is arranged so that Leave the oil of these oil outlets to cross the rotor of motor and directly contact the stator of motor.

Screw compressor the most according to claim 2, it is characterised in that described cooling oil duct contrary with described oil sump One end is to close.

Screw compressor the most according to claim 2, it is characterised in that be additionally provided with in described rotary shaft and described oil The oil leab (228) of pond connection, described oil leab leads to and supports the base bearing of described rotary shaft and/or drive described vortex The driving bearing of mechanism.

Screw compressor the most according to claim 5, it is characterised in that in the case of being provided with a cooling oil duct, Described cooling oil duct is formed by same oil duct with described oil leab；In the case of being provided with more than one cooling oil duct, One in described cooling oil duct is formed by same oil duct with described oil leab.

Screw compressor the most according to claim 1, it is characterised in that described screw compressor is high-pressure side formula compression Machine.

Screw compressor the most according to claim 1, it is characterised in that described screw compressor is the compression of low-pressure side formula Machine, the air inlet (214) of the housing of described screw compressor is arranged close to the entrance (240a) of described vortex mechanism.

Screw compressor the most according to claim 8, it is characterised in that described screw compressor is provided with air inlet guide member (270), described air inlet guide member limits passage (272), the entrance (272a) of described passage and the air inlet of described housing (214) next-door neighbour, the outlet (272b) of described passage is close to the entrance (240a) of described vortex mechanism.

Screw compressor the most according to claim 9, it is characterised in that described vortex mechanism includes dynamic scroll (242) With determine scroll (244), described air inlet guide member (270) is fixed to described determine scroll (244).

11. according to the screw compressor described in any one in claim 1 to 10, it is characterised in that described cooling end is by setting Put the coil pipe (250) in described oil sump to be formed.

12. according to the screw compressor described in any one in claim 1 to 10, it is characterised in that described cooling end is by attached Shell adding portion (280) is formed, and described additional shell portion is outside the position being provided with described oil sump of the housing of described screw compressor Portion is fixed to the housing of described screw compressor so that described oil sump can be carried out cold across described housing by described cooling fluid But.

13. according to the screw compressor described in any one in claim 1 to 10, it is characterised in that described cooling fluid is Water or cold-producing medium.

14. screw compressors according to claim 13, it is characterised in that described screw compressor also includes being arranged on institute Stating pump (260) and the heat abstractor (262) of the outside of housing, described cooling end, described pump and described heat abstractor are connected to each other To form cooling circuit, described pump drives described cooling fluid to circulate in described cooling circuit.

15. screw compressors according to claim 1, it is characterised in that described screw compressor also includes running through described The heat-pipe radiator (290) of housing, heat-pipe radiator includes the evaporator section (290a) being arranged in described oil sump and is arranged in institute Stating the condensation segment (290b) outside the housing of compressor, described evaporator section forms described cooling end.

16. 1 kinds of compressor assemblies (P), including being sequentially connected with to form the compressor of refrigerant loop, condenser (C), throttling Device (V) and vaporizer (E), it is characterised in that described compressor is according to the pressure described in any one in claim 1-14 Contracting machine.

17. compressor assemblies according to claim 16, it is characterised in that described compressor assembly is used as heat pump.

18. compressor assemblies according to claim 16, it is characterised in that described cooling fluid is from described throttling dress Put the cold-producing medium between described vaporizer or from the cold-producing medium between described vaporizer and described compressor.

19. compressor assemblies according to claim 16, it is characterised in that described cooling fluid is water, and described water is at warp Heated by the condenser of described compressor assembly after crossing described cooling end.

20. compressor assemblies according to claim 16, it is characterised in that described screw compressor also includes running through described The heat-pipe radiator (290) of housing, heat-pipe radiator includes the evaporator section (290a) being arranged in described oil sump and is arranged in institute Stating the condensation segment (290b) outside the housing of compressor, described evaporator section forms described cooling end, the fan (292) of described vaporizer Towards described condensation segment air blast.