CN205089624U - Low -backpressure compressor - Google Patents

Abstract

The utility model discloses a low -backpressure compressor, include: a housing. Driving motor, driving motor establish in the casing, compressing mechanism, compressing mechanism are established in the casing, and the compressing mechanism is driven by driving motor, and it has compression chamber and high pressure chest to inject in the compressing mechanism, is provided with the gas vent on the compressing mechanism, and the gas vent is provided with the air bleeding valve with compression chamber intercommunication and gas vent department, exhaust hood, exhaust hood install on the compressing mechanism and the compressing mechanism between inject airtightly and be used for collecting the exhaust and the exhaust chamber of carrying out oil -gas separation, exhaust chamber and high pressure chest intercommunication, the blast pipe, the one end of blast pipe links to each other with the compressing mechanism with the intercommunication high pressure chest, and the other end of blast pipe stretches out outside the casing. According to the utility model discloses a low -backpressure compressor can adopt ordinary bearing arrangement, and spare part can reduce, and the structure is simpler, and manufacturing is convenient, and cost reduction can effectively completely cut off the low temperature and low pressure environment leakage in to the casing of exhaust intracavity portion high temperature high pressure refrigerant.

Description

Low back pressure compressor

Technical field

The utility model relates to Compressor Technology field, more specifically, relates to a kind of low back pressure compressor.

Background technique

Carbon-hydrogen refrigerant is as HCFC (HCFC class), and as R22, and HFC (hydrogen fluorohydrocarbon class), as the alternative refrigerant of R410A or R407C, industry is paid close attention to the most.But, when carbon-hydrogen refrigerant is used for air-conditioner system, have the problem that is very important, be exactly that it has high flammable, the refrigeration agent encapsulation amount of hydrocarbon air conditioner device system must be limited.

Relative to the rotary compressor of high back pressure structure, there is the low back-pressure structure rotary compressor for being communicated with pressure of inspiration(Pi) in low-pressure and housing in a kind of housing.The content of the refrigeration agent in this low back pressure compressor can significantly reduce, and the refrigeration agent encapsulation amount of refrigeration system can significantly be reduced.

But full low-pressure structure needs to arrange an exhaust cavity in compressor inside, in isolated exhaust cavity, High Temperature High Pressure refrigerant leaks to compressor inner cryogenic environment under low pressure.In the related, the parts such as bearing, cover plate, screw that the built-in vent chamber of compressor is increased by flange form, and component are more, complex structure, manufacture more difficult.

Model utility content

The utility model is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, the utility model proposes a kind of low back pressure compressor, this low back pressure compressor is few for the formation of the component of exhaust cavity, and structure is simple, easy to process.

According to low back pressure compressor of the present utility model, comprising: housing; Drive motor, described drive motor is located in described housing; Compressing mechanism, described compressing mechanism is located in described housing, described compressing mechanism is driven by described drive motor, compression chamber and hyperbaric chamber is limited with in described compressing mechanism, described compressing mechanism is provided with relief opening, and described relief opening is communicated with described compression chamber and described exhaust ports is provided with outlet valve; Exhaust hood, described exhaust hood to be arranged on described compressing mechanism and and limit airtight between described compressing mechanism and for collecting the exhaust cavity being vented and carrying out Oil-gas Separation, described exhaust cavity is communicated with described hyperbaric chamber; Outlet pipe, one end of described outlet pipe is connected to be communicated with described hyperbaric chamber with described compressing mechanism, and the other end of described outlet pipe stretches out outside described housing.

According to low back pressure compressor of the present utility model, can adopt common bearing structure, component can reduce, and structure is simpler, convenient processing and manufacture, and cost reduces, and effectively can completely cut off exhaust cavity internal high temperature high pressure refrigerant to low-temp low-pressure environmental leak in housing.

In addition, following additional technical characteristics can also be had according to low back pressure compressor of the present utility model:

According to an embodiment of the present utility model, described compressing mechanism comprises: cylinder, has described compression chamber and hyperbaric chamber in described cylinder; Main bearing, described main bearing is located at above described cylinder; Supplementary bearing, described supplementary bearing is located at below described cylinder, and described supplementary bearing is provided with the through hole being communicated with described exhaust cavity and described hyperbaric chamber, and described exhaust hood is located at below described supplementary bearing.

According to an embodiment of the present utility model, described compressing mechanism comprises: cylinder, has described compression chamber and through channel in described cylinder; Main bearing, described main bearing is located at above described cylinder, has hyperbaric chamber in described main bearing; Supplementary bearing, described supplementary bearing is located at below described cylinder, and described supplementary bearing is provided with through hole, and described hyperbaric chamber is communicated with described exhaust cavity with through hole by described through channel, and described exhaust hood is located at below described supplementary bearing.

According to an embodiment of the present utility model, described exhaust hood is connected with described supplementary bearing and the joint of described exhaust hood and described supplementary bearing is provided with Sealing.

According to an embodiment of the present utility model, described supplementary bearing comprises base portion and the hub portion to downward-extension, and described through hole is located on described base portion, and described exhaust hood comprises: annular bottom plate; Periphery wall, described periphery wall is located at the outside of described annular bottom plate along upper; Inner circle wall, described inner circle wall is located at the inner side of described annular bottom plate along upper, described inner circle wall and described periphery wall are positioned at the upside of described annular bottom plate, described inner circle wall to be set in described hub portion and to be connected with described base portion, described periphery wall is connected with described base portion, and described exhaust cavity is limited by described annular bottom plate, periphery wall, inner circle wall and described base portion.

According to an embodiment of the present utility model, described Sealing is gasket seal, and described gasket seal comprises: inner ring gasket, and described inner ring gasket is located between described inner circle wall and described base portion; Race gasket, described race gasket is located between described periphery wall and described base portion.

According to an embodiment of the present utility model, the bottom of described housing is formed with low pressure oil sump, and the bottom of described exhaust cavity is formed with high pressure oil sump, and described high pressure oil sump is communicated with by oil return apparatus with described low pressure oil sump.

According to an embodiment of the present utility model, low back pressure compressor also comprises oil supplying device, and described oil supplying device is communicated with the slide plate chamber in described high pressure oil sump and described cylinder, with to described slide plate chamber fuel feeding.

According to an embodiment of the present utility model, described oil supplying device is fuel supply line, described supplementary bearing is provided with the mounting hole be communicated with described slide plate chamber, and the one end fits of described fuel supply line is in described mounting hole, and the other end of described fuel supply line is located in described high pressure oil sump.

According to an embodiment of the present utility model, the lower surface of described supplementary bearing is provided with the mounting groove be communicated with described mounting hole, described fuel supply line is formed as bending tube and comprises first, second, and third pipeline section, described second pipeline section is connected between described first pipeline section and described 3rd pipeline section, described first pipeline section is communicated with described high pressure oil sump, described 3rd pipeline section is plugged in described mounting hole, and described second pipeline section to be located in described mounting groove and only to support described exhaust hood.

According to an embodiment of the present utility model, described exhaust hood is stamping part.

Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.

Accompanying drawing explanation

Fig. 1 is the structural representation of the low back pressure compressor according to the utility model embodiment;

Fig. 2 is the part-structure enlarged diagram of the low back pressure compressor according to the utility model embodiment;

Fig. 3 is the structural representation of the exhaust hood of low back pressure compressor according to the utility model embodiment;

Fig. 4 is the structural representation of another angle of the exhaust hood of low back pressure compressor according to the utility model embodiment;

Fig. 5 is the magnified partial view of structure shown in Fig. 2;

Fig. 6 is the structural representation of the supplementary bearing of low back pressure compressor according to the utility model embodiment;

Fig. 7 is the structural representation of the low back pressure compressor according to another embodiment of the utility model.

Reference character:

Low back pressure compressor 100;

Housing 10; Main casing 11; Upper shell 12; Lower shell body 13; Outlet pipe 14;

Hyperbaric chamber 201; Slide plate chamber 202; Through hole 203; Through channel 204; Mounting hole 205; Mounting groove 206; Main bearing 21; Cylinder 22; Supplementary bearing 23; Hub portion 231; Base portion 232; Slide plate 24; Bent axle 25; Piston 26;

Drive motor 30; Stator 31; Rotor 32;

Exhaust hood 40; Exhaust cavity 401; Annular bottom plate 41; Periphery wall 42; Inner circle wall 43;

Gasket seal 50; Inner ring gasket 51; Race gasket 52;

Fuel supply line 60; First pipeline section 61; Second pipeline section 62; 3rd pipeline section 63;

Oil return apparatus 70.

Embodiment

Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.

The low back pressure compressor 100 according to the utility model embodiment is described in detail below in conjunction with accompanying drawing.Be appreciated that, gas after compression leads to successively by being directly delivered to outside housing 10 by refrigerant with the exhaust cavity 401 and hyperbaric chamber 201 of housing 10 internal insulation by the compressing mechanism of low back pressure compressor 100, housing 10 inside is communicated with low pressure return-air, and therefore this kind of compressor is referred to as low back pressure compressor 100.

Shown in Fig. 7, housing 10, drive motor 30, compressing mechanism, exhaust hood 40 and outlet pipe 14 can be comprised according to the low back pressure compressor 100 of the utility model embodiment.

Drive motor 30, compressing mechanism and exhaust hood 40 can be located in housing 10.Compressing mechanism can be driven by drive motor, and exhaust hood 40 can be arranged on compressing mechanism.Compression chamber and hyperbaric chamber 201 can be limited with in compressing mechanism.One end of outlet pipe 14 can be connected to be communicated with hyperbaric chamber 201 with compressing mechanism, the other end of outlet pipe 14 can stretch out outside housing 10.

Compressing mechanism can be provided with relief opening, and relief opening is communicated with compression chamber and exhaust ports is provided with outlet valve.After gas pressure in compression chamber reaches predetermined value, outlet valve will be opened to be exhausted.Exhaust hood 40 can limit airtight exhaust cavity 401 with compressing mechanism.That is, exhaust hood 40 can be sealed and matched the exhaust cavity 401 limiting and isolate with the low-temp low-pressure environment in housing 10 with compressing mechanism.Now, exhaust cavity 401 inside is High Temperature High Pressure, and outside is low-temp low-pressure, and exhaust cavity 401 is not communicated with enclosure interior.Meanwhile, exhaust cavity 401 is communicated with hyperbaric chamber 201, and exhaust cavity 401 may be used for collecting exhaust and carrying out Oil-gas Separation.When the exhaust valve is opened, the gas in compression chamber can be collected in exhaust cavity 401, and carries out Oil-gas Separation in exhaust cavity 401, and the gas after separation enters into hyperbaric chamber 201, and discharges from outlet pipe 14.

According to the low back pressure compressor 100 of the utility model embodiment, exhaust hood 40 can coordinate with associated compressors structure thus form exhaust cavity 401, this exhaust cavity 401 is isolated with the low-temp low-pressure environment of housing 10 inside, be communicated with hyperbaric chamber 201, can make the high temperature and high pressure gas after compression can not to housing 10 internal leakage, through hyperbaric chamber 201, can discharge smoothly from outlet pipe 14.The low back pressure compressor 100 of this kind of structure can adopt common bearing structure, and component can reduce, and structure is simpler, convenient processing and manufacture, cost reduce, good reliability and be easy to realize, effectively can completely cut off exhaust cavity 401 internal high temperature high pressure refrigerant to low-temp low-pressure environmental leak in compressor.

Simultaneously, due to the setting of hyperbaric chamber 201, the path that gas is discharged is longer, ensure that the effect of Oil-gas Separation, make telling oil mass and can reducing of low back pressure compressor 100, ensure that housing 10 inside has enough lubricant oil for lubricating movement part, avoid the too much lubricant oil system that enters participate in circulating and affect the operational efficiency of chiller plant simultaneously.In addition, the exhaust hood 40 of sealing can also be eliminated the noise to exhaust, and exhaust noise can be reduced, and exhaust effect is better.

As shown in Figure 1, housing 10 can comprise main casing 11, upper shell 12 and lower shell body 13, main casing 11 can be formed as the ring-type that top and bottom are all opened wide, upper shell 12 is located at above main casing 11, upper shell 12 and main casing 11 can be integrally welded, lower shell body 13 is located at below main casing 11, and lower shell body 13 and main casing 11 can be integrally welded, and upper shell 12, main casing 11 and lower shell body 13 are encircled into an airtight installation cavity.Wherein, main member such as compressing mechanism, the drive motor 30 etc. of low back pressure compressor 100 are all arranged at this installation cavity inside.But should be understood that, the structure according to the housing 10 of the utility model embodiment is not limited thereto.

Drive motor 30 is located in housing 10, and drive motor 30 can comprise stator 31 and rotor 32, and stator 31 can be weldingly fixed on the internal face of main casing 11, and rotor 32 is engaged in the inner side of stator 31 rotationally.

Compressing mechanism is driven by drive motor 30.Specifically, rotor 32 is connected with the bent axle 25 of compressing mechanism, and the central axis of rotor 32 driving crank 25 flexing axle 25 rotates.Compressing mechanism inside is limited with compression chamber, and refrigerant, from after the intakeport cylinder 22 is inhaled into compression chamber, can be compressed it by piston 26.Compressing mechanism is provided with relief opening, and relief opening is for discharging the refrigerant after overcompression, and relief opening is communicated with compression chamber, and exhaust ports is provided with outlet valve, for opening and closing relief opening.

Exhaust hood 40 is arranged on compressing mechanism, to limit exhaust cavity 401 between exhaust hood 40 and compressing mechanism.Exhaust hood 404 and compressing mechanism seal in joint, thus can form exhaust cavity 401 that is airtight, that be not communicated with housing 10 inside, avoid High Temperature High Pressure to be vented to housing 10 internal leakage.Thus, the refrigerant of discharging from relief opening all enters in exhaust cavity 401, then discharges housing 10 from outlet pipe 14 through hyperbaric chamber 201.

As depicted in figs. 1 and 2, compressing mechanism can comprise cylinder 22, main bearing 21 and supplementary bearing 23.Compression chamber and hyperbaric chamber 201 can be had in cylinder 22.Main bearing 21 can be located at above cylinder 22.Supplementary bearing 23 can be located at below cylinder 22.Supplementary bearing 23 can be provided with through hole 203, and through hole 203 can be communicated with exhaust cavity 401 and hyperbaric chamber 201, and the refrigerant in exhaust cavity 401 can be flow in hyperbaric chamber 201 by through hole 203.Exhaust hood 40 can be located at below supplementary bearing 23.This kind of structure is convenient to manufacture and assembling, practical.

Certainly, hyperbaric chamber 201 is not limited only to be located on cylinder 22, also can be located on supplementary bearing 23 or main bearing 21.Such as, as shown in Figure 7, hyperbaric chamber 201 can be located in main bearing 21, wherein, through channel 204 can be provided with in cylinder 22, this through channel 204 is communicated with hyperbaric chamber 201 and through hole 203, and the gas in exhaust cavity 401 can be entered in hyperbaric chamber 201 by through hole 203 and through channel 204 successively.This kind of structure also not easily manufactures and assembles, and can extend the flow path of refrigerant, improves the effect of Oil-gas Separation further, and this structure is also helpful to the integral rigidity of compressing mechanism simultaneously.

Wherein, outlet pipe 14 can extend into housing 10 inside from main casing and be connected with compressing mechanism, and when hyperbaric chamber 201 is located on cylinder 22, one end of outlet pipe 14 can extend in cylinder 22; When hyperbaric chamber 201 is located on main bearing 21, one end of outlet pipe 14 can extend in main bearing 21.Wherein, outlet pipe 14 can be fastened in cylinder 22 or main bearing 21 by Morse's taper.

Be understandable that, exhaust hood 40 can be connected with supplementary bearing 23, and also can be connected with housing 10 or cylinder 22, this can specifically be arranged as required.Such as, as depicted in figs. 1 and 2, exhaust hood 40 can be connected with supplementary bearing 23.Specifically, exhaust hood 40 can be connected with the lower surface of supplementary bearing 23.As shown in Figure 3 and Figure 4, exhaust hood 40 can arrange screw hole, exhaust hood 40 can adopt the fastening pieces such as screw to be connected with supplementary bearing 23, easy to connect and firmly.

Preferably, exhaust hood 40 can be provided with Sealing with the joint of supplementary bearing 23.Thus, the connection sealing between exhaust hood 40 and supplementary bearing 23 can be improved, ensure the sealing of exhaust cavity 401 further, prevent refrigerant from from the gap between exhaust hood 40 and supplementary bearing 23, flowing into housing 10 inner.

Supplementary bearing 23 can comprise base portion 232 and the hub portion 231 to downward-extension.Hub portion 231 is connected with base portion 232, and extends beyond the lower surface of base portion 232 downwards, and through hole 203 can be located on base portion 232.Exhaust hood 40 can comprise annular bottom plate 41, periphery wall 42 and inner circle wall 43.Periphery wall 42 can be located at the outside of annular bottom plate 41 along upper, and inner circle wall 43 can be located at the inner side of annular bottom plate 41 along upper, and inner circle wall 43 and periphery wall 42 are positioned at the upside of annular bottom plate 41.Inner circle wall 43 can be set in hub portion 231 and to be connected with base portion 232, and periphery wall 42 can be connected with base portion 232, and exhaust cavity 401 can be limited by annular bottom plate 41, periphery wall 42, inner circle wall 43 and base portion 232.

Here, it should be noted that, annular bottom plate 41 described above, annexation between periphery wall 42 and inner circle wall 43 are that the state be assemblied on compressing mechanism with annular bottom plate 41 is described.For an independent exhaust hood 40, periphery wall 42 and inner circle wall 43 are the same sides being located at annular bottom plate 41, and periphery wall 42 and inner circle wall 43 are oppositely arranged, a side being located at annular bottom plate 41 is along upper, and another opposite side being located at annular bottom plate 41 is along upper.

Preferably, in embodiments more of the present utility model, exhaust hood 40 can be stamping part.The exhaust hood 40 of this kind of structure is not only convenient to manufacture, and manufacture cost is relatively low, and the strength and stability of exhaust hood 40 is better, can meet actual operation requirements.

Alternatively, Sealing can be gasket seal 50, and gasket seal 50 can comprise inner ring gasket 51 and race gasket 52, as shown in Figure 2.Inner ring gasket 51 can be located between inner circle wall 43 and base portion 232, and race gasket 52 can be located between periphery wall 42 and base portion 232.Thus, the connection sealing between exhaust hood 40 and supplementary bearing 23 can effectively be improved.Wherein, periphery wall 42 and inner circle wall 43 can have flange respectively, and flange can only be against on base portion 232, and flange can arrange screw hole.Thus, periphery wall 42 and the connection area of inner circle wall 43 respectively and between base portion 232 not only can be made to become greatly, facilitate to connect and can improve sealing effect simultaneously, and gasket seal 50 also can be urgent by beating screw mode.

As shown in Figure 1, Figure 2 and Figure 7, in embodiments more of the present utility model, the bottom of housing 10 can be formed with low pressure oil sump B, and the bottom of exhaust cavity 401 can be formed with high pressure oil sump A, and high pressure oil sump A can be communicated with by oil return apparatus 70 with low pressure oil sump B.Thus, in the low pressure oil sump B that the oil obtained after Oil-gas Separation in exhaust cavity 401 can be made can be back in housing 10, oil return is effective.Wherein, oil return apparatus 70 can be capillary tube, and capillary tube is easy to the oil in high pressure oil sump A is carried in low pressure oil sump B, simultaneously due to the decompression of capillary tube, can reduce the leakage of pressurized gas toward low-pressure cavity.

According to embodiments more of the present utility model, low back pressure compressor 100 can also comprise oil supplying device, as shown in Figure 1, Figure 2, shown in Fig. 5 and Fig. 7.Oil supplying device can be communicated with the slide plate chamber 202 in high pressure oil sump A and cylinder 22, the oil after Oil-gas Separation in exhaust cavity 401 can be supplied to slide plate chamber 202, ensures the seal lubrication in slide plate chamber 202.Slide plate 24 can be arranged in the slide plate chamber 202 of cylinder 22, and the head of slide plate 24 connects with the periphery of piston, the afterbody of slide plate 24 can with spring interface.

Alternatively, oil supplying device can be fuel supply line 60, as shown in Figure 2 and Figure 5, supplementary bearing 23 can be provided with mounting hole 205, mounting hole 205 can be communicated with slide plate chamber 202, and one end of fuel supply line 60 can be engaged in mounting hole 205, and the other end of fuel supply line 60 can be located in high pressure oil sump A.Wherein, one end of fuel supply line 60 can with mounting hole 205 interference fit, move to prevent fuel supply line 60.

Be understandable that, the shape of fuel supply line 60 can be formed as multiple, and alternatively, in embodiments more of the present utility model, fuel supply line 60 can be formed as bending tube.As shown in Figure 2 and Figure 4, fuel supply line 60 can comprise the first pipeline section 61, second pipeline section 62 and the 3rd pipeline section 63.Second pipeline section 62 can be connected between the first pipeline section 61 and the 3rd pipeline section 63, and the first pipeline section 61 is communicated with high pressure oil sump A, and the 3rd pipeline section 63 can be plugged in mounting hole 205.As shown in Figure 5 and Figure 6, the lower surface of supplementary bearing 23 can be provided with mounting groove 206, second pipeline section 62 be communicated with mounting hole 205 can be located in mounting groove 206 and only to support exhaust hood 40.Thus, can ensure the soundness that fuel supply line 60 is installed to make more compact structure simultaneously.

Specifically, first pipeline section 61 is connected with one end of the second pipeline section 62,3rd pipeline section 63 is connected with the other end of the second pipeline section 62, first pipeline section 61 can extend in high pressure oil sump A away from one end of the second pipeline section 62,3rd pipeline section 63 can be interference fitted in mounting hole 205, and the second pipeline section 62 is positioned at the mounting groove 206 opened wide downwards, and the lower end of the second pipeline section 62 can be supported on the periphery wall 42 of exhaust hood 40, realize compressing by exhaust hood 40, install comparatively firm.

Below the working procedure of low back pressure compressor 100 is described.The sucking pipe parts of refrigerant outside housing 10 of low-temp low-pressure enter into housing 10 inside, in housing 10 inside after short-term buffering, enter into the intakeport of compressing mechanism, such as, be located at the intakeport on main bearing 21, then enter in compression chamber and compress, the gas of low-temp low-pressure is discharged to exhaust cavity 401 after overcompression.

The gas of High Temperature High Pressure enters into exhaust cavity 401, exhaust cavity 401 carries out noise reduction and Oil-gas Separation, the high pressure oil sump A of oil accumulation after Oil-gas Separation bottom exhaust cavity 401, an oil part in high pressure oil sump A can be supplied to slide plate chamber 202 by oil supplying device and be used as sealing and lubrication, and remaining part then can get back to low pressure oil sump B by oil return apparatus 70.High temperature and high pressure gas after noise reduction and Oil-gas Separation, enters into outlet pipe 14 through hyperbaric chamber 201, is then discharged outside housing, carries out refrigeration cycle.Wherein, the flow direction of gas is as realized shown in arrow in Fig. 2, the flow direction of oil as represented by the arrows in the dashed line in figure 2.

According to the low back pressure compressor 100 of the utility model embodiment other form and operation be known for the person of ordinary skill of the art, be not described in detail at this.

In description of the present utility model, it will be appreciated that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "front", "rear", " end ", " interior ", " outward ", " circumference " they be based on orientation shown in the drawings or position relationship; be only the utility model and simplified characterization for convenience of description; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.

In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection or each other can communication; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.

In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " above " can be fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.

In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment " or " specific embodiment ", " example " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.

Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.

Claims (11)

1. a low back pressure compressor, is characterized in that, comprising:

Housing;

Drive motor, described drive motor is located in described housing;

Compressing mechanism, described compressing mechanism is located in described housing, described compressing mechanism is driven by described drive motor, compression chamber and hyperbaric chamber is limited with in described compressing mechanism, described compressing mechanism is provided with relief opening, and described relief opening is communicated with described compression chamber and described exhaust ports is provided with outlet valve;

Exhaust hood, described exhaust hood to be arranged on described compressing mechanism and and limit airtight between described compressing mechanism and for collecting the exhaust cavity being vented and carrying out Oil-gas Separation, described hyperbaric chamber is communicated with described exhaust cavity;

Outlet pipe, one end of described outlet pipe is connected to be communicated with described hyperbaric chamber with described compressing mechanism, and the other end of described outlet pipe stretches out outside described housing.

2. low back pressure compressor according to claim 1, is characterized in that, described compressing mechanism comprises:

Cylinder, has described compression chamber and described hyperbaric chamber in described cylinder;

Main bearing, described main bearing is located at above described cylinder;

Supplementary bearing, described supplementary bearing is located at below described cylinder, and described supplementary bearing is provided with the through hole being communicated with described exhaust cavity and described hyperbaric chamber, and described exhaust hood is located at below described supplementary bearing.

3. low back pressure compressor according to claim 1, is characterized in that, described compressing mechanism comprises:

Cylinder, has described compression chamber and through channel in described cylinder;

Main bearing, described main bearing is located at above described cylinder, is provided with described hyperbaric chamber in described main bearing;

Supplementary bearing, described supplementary bearing is located at below described cylinder, and described supplementary bearing is provided with through hole, and described hyperbaric chamber is communicated with described exhaust cavity with through hole by described through channel, and described exhaust hood is located at below described supplementary bearing.

4. the low back pressure compressor according to Claims 2 or 3, is characterized in that, described exhaust hood is connected with described supplementary bearing and the joint of described exhaust hood and described supplementary bearing is provided with Sealing.

5. low back pressure compressor according to claim 4, is characterized in that, described supplementary bearing comprises base portion and the hub portion to downward-extension, and described through hole is located on described base portion, and described exhaust hood comprises:

Annular bottom plate;

Periphery wall, described periphery wall is located at the outside of described annular bottom plate along upper;

Inner circle wall, described inner circle wall is located at the inner side of described annular bottom plate along upper, described inner circle wall and described periphery wall are positioned at the upside of described annular bottom plate, described inner circle wall to be set in described hub portion and to be connected with described base portion, described periphery wall is connected with described base portion, and described exhaust cavity is limited by described annular bottom plate, periphery wall, inner circle wall and described base portion.

6. low back pressure compressor according to claim 5, is characterized in that, described Sealing is gasket seal, and described gasket seal comprises:

Inner ring gasket, described inner ring gasket is located between described inner circle wall and described base portion;

Race gasket, described race gasket is located between described periphery wall and described base portion.

7. the low back pressure compressor according to Claims 2 or 3, is characterized in that, the bottom of described housing is formed with low pressure oil sump, and the bottom of described exhaust cavity is formed with high pressure oil sump, and described high pressure oil sump is communicated with by oil return apparatus with described low pressure oil sump.

8. the low back pressure compressor according to Claims 2 or 3, is characterized in that, also comprise oil supplying device, and described oil supplying device is communicated with the slide plate chamber in described high pressure oil sump and described cylinder, with to described slide plate chamber fuel feeding.

9. low back pressure compressor according to claim 8, it is characterized in that, described oil supplying device is fuel supply line, described supplementary bearing is provided with the mounting hole be communicated with described slide plate chamber, the one end fits of described fuel supply line is in described mounting hole, and the other end of described fuel supply line is located in described high pressure oil sump.

10. low back pressure compressor according to claim 9, it is characterized in that, the lower surface of described supplementary bearing is provided with the mounting groove be communicated with described mounting hole, described fuel supply line is formed as bending tube and comprises first, second, and third pipeline section, described second pipeline section is connected between described first pipeline section and described 3rd pipeline section, described first pipeline section is communicated with described high pressure oil sump, described 3rd pipeline section is plugged in described mounting hole, and described second pipeline section to be located in described mounting groove and only to support described exhaust hood.

11. low back pressure compressors according to claim 1, is characterized in that, described exhaust hood is stamping part.