CN201078318Y

CN201078318Y - Ammonia refrigerating compressor

Info

Publication number: CN201078318Y
Application number: CNU2007200717113U
Authority: CN
Inventors: 崔炳如
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-27
Filing date: 2007-06-27
Publication date: 2008-06-25
Anticipated expiration: 2017-06-27

Abstract

The utility model discloses an ammonia refrigerating compressor, which comprises a stator, a rotor, a sheath, a compressing device, an air inlet pipe, an air exhaust pipe and a stator housing, which covers the stator. The stator is in coaxial arrangement with the rotor, which comprises a permanent magnet and a rotor iron core. The compressing device consists of a compressing part and a compressing device casing, by which the compressing part is covered. The compressing part comprises a main shaft, which is fixedly connected with the rotor. An air inlet pipe and an air exhaust pipe are installed on the compressing device casing. The sheath is a cap-shaped body with an opening at the lower end, and the peripheral wall of the sheath is sleeved in a clearance between the stator and the rotor. An opening part of the sheath is fastened at a port of the compressing device, forming a seal chamber with the compressing device casing. The compressing part and the rotor are arranged in the seal chamber. The lower end of the stator is secured on a cap margin part at the lower end of the sheath, and the sheath is made of nonmagnetic material. For the ammonia can be taken by the utility model as the refrigerant, the atmospheric ozone layer cannot be destroyed and no greenhouse effect is generated. The utility model has good environmental protection performance energy saving property.

Description

Ammonia refrigerating compressor

Technical field

The utility model relates to refrigeration compressor, relates in particular to a kind of refrigeration compressor that uses ammonia.

Background technique

Current refrigeration compressor adopts freon as refrigeration agent mostly.In order to reduce greenhouse effect, protect atmospheric ozone layer, people seek to adopt low public hazards, environmental protection class material to come the replacement fluorine Leon just hardy.Ammonia be to atmospheric ozone layer do not have destruction, to one of Global Greenhouse Effect only a few working medium like water off a duck's back, and use inexpensive efficient as refrigeration agent.But the ammonia steam has corrosive action to copper and Cuprum alloy (except the phosphor bronze), therefore, can not use copper and copper alloy in the refrigeration system of ammonia.In addition, ammonia has bigger toxicity, in case leak, with contaminated air, food, and the eyes and the respiratory apparatus that stimulate the people.Because above-mentioned shortcoming, make ammonia seldom as refrigerant applications in small-sized refrigeration plant.

Existing refrigeration compressor is that compression set and motor are contained in the dead housing of weldering mostly.Because the coil of motor all is to adopt the copper cash coiling to form, and ammonia has strong corrosion to copper, thereby, adopt the refrigeration compressor of existing structure can't adopt ammonia as refrigeration agent.

Summary of the invention

The purpose of this utility model is to provide a kind of safe, ammonia refrigerating compressor efficiently that can use ammonia.

The technological scheme that the utility model adopted is: a kind of ammonia refrigerating compressor comprises stator, rotor, compression set, suction tude, outlet pipe and covers on the outer stator case of stator; Stator and rotor coaxial setting, rotor comprises permanent magnet, rotor core; Compression set comprises compression member and covers on the outer compression set housing of compression member, and compression member comprises main shaft, and this main shaft is fixedlyed connected with rotor; Be characterized in that suction tude and outlet pipe are arranged on the compression set housing; Ammonia refrigerating compressor also comprises a housing, this housing is the calyptra of a lower ending opening, the perisporium of housing is set in stator and the gap between rotor, the opening portion of housing is fixedly arranged on the oral area of compression set, form a seal chamber with the compression set housing, compression member and rotor are arranged in the seal chamber; The lower end of stator is fixed in the shade portion of lower end of housing; Housing is made by nonmagnetic substance.

Preferably, stator comprises the AC excitation winding; Rotor comprises cage type starting winding, and the permanent magnet of rotor adopts built-in tangential formula field structure.

Preferably, stator comprises the DC excitation winding; Be coated with the rotor protecting jacket on the outer wall of rotor, the rotor protecting jacket is made by nonmagnetic substance; This ammonia refrigerating compressor also comprises detecting apparatus for rotor position and the order of control DC excitation winding energising and the electronic commutation circuit block of time of the position that is used for detection rotor.

Preferably, housing is made by the nonmagnetic substance of anti-ammonia corrosion.

Technique effect of the present utility model is: 1. the utility model can adopt ammonia as refrigeration agent, can not destroy atmospheric ozone layer and produce greenhouse effect, has favorable environment protection and energy saving; 2. the utility model can be sealed in ammonia in housing and the compression set housing, does not have to leak, and is safe in utilization; 3. the utility model also has advantages such as volume is little, compact structure.

Description of drawings

Fig. 1 is the structural representation of first kind of mode of execution of the utility model ammonia refrigerating compressor;

Fig. 2 is the sectional view of the ammonia refrigerating compressor of Fig. 1 along the A-A line;

Fig. 3 A is a kind of stator of ammonia refrigerating compressor of Fig. 1 and the structural representation of rotor;

Fig. 3 B is the another kind of stator of ammonia refrigerating compressor of Fig. 1 and the structural representation of rotor;

Fig. 4 is the structural representation of second kind of mode of execution of the utility model ammonia refrigerating compressor;

Fig. 5 A is a kind of stator of ammonia refrigerating compressor of Fig. 4 and the structural representation of rotor;

Fig. 5 B is the another kind of stator of ammonia refrigerating compressor of Fig. 4 and the structural representation of rotor;

Fig. 5 C is the another kind of stator of ammonia refrigerating compressor of Fig. 4 and the structural representation of rotor;

Fig. 6 is the structural representation of the third mode of execution of the utility model ammonia refrigerating compressor;

Fig. 7 A is the sectional view of the ammonia refrigerating compressor of Fig. 6 along the B-B line;

Fig. 7 B is the sectional view of the ammonia refrigerating compressor of Fig. 6 along the C-C line;

Fig. 8 is the structural representation of the 4th kind of mode of execution of the utility model ammonia refrigerating compressor;

Fig. 9 is the structural representation of the 5th kind of mode of execution of the utility model ammonia refrigerating compressor;

Figure 10 is the structure for amplifying schematic representation of the P part of Fig. 9;

Figure 11 is the structural representation of the 6th kind of mode of execution of the utility model ammonia refrigerating compressor;

Figure 12 is the structural representation of the 7th kind of mode of execution of the utility model ammonia refrigerating compressor;

Figure 13 is the structural representation of the 8th kind of mode of execution of the utility model ammonia refrigerating compressor.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

Fig. 1 is the structural representation of first kind of mode of execution of the utility model ammonia refrigerating compressor.As shown in the figure, ammonia refrigerating compressor comprises rolling rotor-type compression set 1, rotor 2, stator 3, housing 4, suction tude 5, outlet pipe 6, is used for the detecting apparatus for rotor position 24 and the electronic commutation circuit block 25 of the position of detection rotor.Wherein, stator 3 and rotor 2 coaxial settings are provided with a stator case 31 that covers stator 3 outside stator.Rotor 2 comprises permanent magnet 21 and rotor core 22; have an axis hole 221 in the central position of rotor core 22; also be coated with rotor protecting jacket 23 on the outer wall of rotor 2, rotor protecting jacket 23 is made by the nonmagnetic substance of anti-ammonia corrosion, and this material of anti-the ammonia corrosion can be stainless steel etc.In conjunction with shown in Figure 2, rolling rotor-type compression set 1 comprises cylinder 12, rolling rotor 13, slide plate 14, compression set housing 15, the sheet 16 that oils, main shaft 17, loam cake 18, lower cover 19 and clamshell 20.In cylinder 12, be provided with intakeport 121 and relief opening 122, on relief opening 122, also be provided with outlet valve.The inside of main shaft 17 has oil duct, and the inwall of loam cake 18 has oil groove, by being contained in the centrifugal action of sheet 16 when main shaft rotates that oil in the main shaft 17 lower central holes, oil can be supplied to positions such as the oil groove of loam cake and pressing chamber, and the voltage supply compression apparatus is lubricated.Loam cake 18 is fixed together with compression set housing 15 by welding, and loam cake 18, cylinder 12, lower cover 19 and clamshell 20 are connected by bolt.The axis hole 221 that the main shaft 17 of rolling rotor-type compression set passes rotor 2 is fixedlyed connected with rotor 2, can connect main shaft 17 and rotor 2 by the key ways of connecting, also can adopt other Placement.Housing 4 is the calyptra of a lower ending opening, and its perisporium is set in the gap between stator 3 and the rotor 2.The opening portion of housing 4 is fixedly arranged on the oral area of rolling rotor-type compression set; form a seal chamber with compression set housing 15; in compression member in rotor 2, rotor protecting jacket 23 and the compression set housing is sealed in, thereby make the refrigerant vapor in the sealing chamber can not leak.Housing 4 is made by the nonmagnetic substance of anti-ammonia corrosion, as stainless steel, titanium etc.Unbalance inertia force and moment for balance rolling rotor 13 prevent surge, preferably, can equilibrium block 29 be set on the axial end of rotor 2, and the size of equilibrium block 29 and quantity are decided according to the situation of main shaft 17.Suction tude 5 is arranged on a side of compression set housing 15, and outlet pipe 6 is arranged on the opposite side of compression set housing 15.Preferably, suction tude 5 and outlet pipe 6 are made by stainless steel.Position detecting device 24 can adopt electromagnetic position sensor, carries out the detection of rotor-position as Hall transducer; Also can adopt no sensing station detection technique detection rotor position of magnetic pole.

Fig. 3 A and 3B are respectively the two kinds of stators of ammonia refrigerating compressor of Fig. 1 and the structural representation of rotor.In the present embodiment, the working principle of stator 3 and rotor 2 is identical with brushless, permanently excited direct current motor.Stator 3 comprises DC excitation winding 32 and stator core 34.Be provided with several screw through-hole 33 on the axial end of stator core 34, these screw through-hole are in order with screw stator 3 to be fixed on the housing 4 and be provided with.In the shade portion 41 of housing 4, be welded with several nuts accordingly with screw through-hole, these nuts have certain height, screw passes screw through-hole stator 3 is fixed on these nuts, makes the lower axial end face of stator 3 can not run into the upper surface of shade portion 41, causes wearing and tearing.

During work, the steam of ammonia is entered by suction tude 5 in the intakeport 121 of cylinder 12 of rolling rotor-type compression set 1.When the DC excitation winding 32 of stator a certain switched on mutually, the magnetic field interaction that magnetic pole produced of the permanent magnet 21 of this electric current and rotor and produce torque, the rotation of driving rotor, by position detecting device 24 the permanent magnet evolution of rotor is become electrical signal again, remove to control electronic commutation circuit block 25, thereby make the conducting in certain sequence of each phase winding of stator, the stator phase current is commutation according to a certain order with the variation of rotor-position, make staor winding produced in the running magnetic field and rotate in the permanent magnetic field that produces of rotor permanent magnet, remain the electrical angle about 90 ° in the space.When rotor 2 rotations, the feasible main shaft 17 that links together with rotor 2 is and then rotation also.Correspondingly, processes such as rolling rotor-type compression set 1 beginning is air-breathing, compression, exhaust, the ammonia steam of discharge is discharged from behind the relief opening 122 of cylinder 12, outlet pipe 6.Because housing 4 and compression set housing 15 have formed the cavity of a sealing, so the ammonia steam can not leak into the outside of refrigeration compressor, also can not erode to the copper coil of staor winding.

Fig. 4 is the structural representation of second kind of mode of execution of the utility model ammonia refrigerating compressor.The difference of itself and first kind of mode of execution only is the structure of stator 3 and rotor 2.In the present embodiment, the working principle of stator 3 and rotor 2 is identical with permanent magnet synchronous motor.Fig. 5 A, 5B show three kinds of different field structures respectively with 5C.Stator 3 comprises AC excitation winding 32A and stator core 34A.Be used for stator 3 is fixed on screw through-hole 33 on the housing 4 being provided with several on the axial end of stator core 34A.Rotor 2 comprises permanent magnet 21A, rotor core 22A, has a plurality of grooves at the outer peripheral surface of rotor core 22A, is provided with cage type starting winding 24 in groove, and cage type starting winding 24 can be made of aluminum.The permanent magnet 21A of rotor adopts built-in tangential formula field structure, so, can utilize the asynchronous starting torque to realize self-starting.In order to prevent that main flux from passing through the rotor shaft closure, in the structure of Fig. 5 A, 5B and 5C, be provided with multi-form air magnet isolation tank respectively, so that reduce the leakage field of permanent magnet.Can coat rotor protecting jacket 23 on the outer wall of rotor 2, rotor protecting jacket 23 is made by the nonmagnetic substance of anti-ammonia corrosion, and this material of anti-the ammonia corrosion can be stainless steel etc.When rotor 2 rotations, the feasible main shaft 17 that links together with rotor 2 is and then rotation also, thereby makes 1 work of rolling rotor-type compression set.

Fig. 6 and Fig. 8 are respectively the structural representation of the third mode of execution of the utility model ammonia refrigerating compressor and the 4th kind of mode of execution, the difference of these two kinds of mode of executions and first, second kind mode of execution is that the compression set that is adopted is the eddy type compression set.This eddy type compression set is arranged on the below of rotor and stator.Wherein, the stator of the third mode of execution and the structure of rotor are identical with first kind of mode of execution, and the stator of the 4th kind of mode of execution and the structure of rotor are identical with second kind of mode of execution.In conjunction with shown in Figure 7, eddy type compression set 1b comprises Moving plate 12b, quiet dish 13b, anti-from change 14b, compression set housing 15b, spray bar 16b, main shaft 17b, loam cake 18b, sealing cover 19b.Wherein, loam cake 18b is fixed together with compression set housing 15b by welding.The axis hole that rotor 2 is passed in the upper end of the main shaft 17b of eddy type compression set 1b is fixedlyed connected with rotor 2, and like this, when rotor 2 rotations, main shaft 17b can rotate thereupon, thereby drives eddy type compression set 1b work.And the upper end of main shaft 17b is supported by a bearing 20b, and the inwall of bearing 20b and housing 4 fits tightly.Can connect main shaft 17b and rotor 2 by the key ways of connecting, also can adopt other Placement.Housing 4 is the calyptra of a lower ending opening, and its perisporium is set in the gap between stator 3 and the rotor 2.The opening portion of housing 4 is fixedly arranged on the oral area of eddy type compression set; 15b forms a seal chamber with the compression set housing; in compression member in rotor, rotor protecting jacket and the compression set housing is sealed in, thereby make the refrigerant vapor in the sealing chamber can not leak.Housing 4 is made by the nonmagnetic substance of anti-ammonia corrosion, as stainless steel, titanium etc.Moving plate 12b is pressed on the quiet dish 13b, and quiet dish 13b is pressed on the sealing cover 19b, in the bottom of quiet dish 13b one boss to lower convexity is arranged, and this boss is positioned at the neutral position of quiet dish; Interposition at sealing cover 19b is equipped with a groove, and the boss of quiet dish 13b is received within this groove just.Quiet dish 13b also is fixed together by locating stud and screw and loam cake 18b.The inwall of sealing cover 19b and compression set housing 15b closely cooperates.On Moving plate 12b, be provided with the intakeport (not shown), on quiet dish 13b, be provided with relief opening 132b.Relief opening 132b is arranged on the centre of quiet dish 13b, is provided with an one-way valve 191 in the underpart of relief opening 132b, discharges to guarantee the gas unidirectional in the pressing chamber, prevents that pressurized gas from blowing back into pressing chamber from relief opening 132b.Below the valve block of this one-way valve 191, also be provided with a spring 191b, can close reliably with the valve block of guaranteeing one-way valve.Sealing cover 19b will be positioned at parts such as the Moving plate of its top, quiet dish and seal, and make compressed gas can only enter into by the relief opening on the quiet dish in the hyperbaric chamber 195b of sealing cover 19b below.Lubricant oil has been placed in bottom at compressor housing 15b, has inserted a spray bar 16b in lubricant oil.Be provided with the oil pipe hole that penetrates for spray bar 16 on sealing cover 19b, quiet dish 13b and loam cake 18b, spray bar 16b passes sealing cover, quiet dish and loam cake, and its oil nozzle is positioned on the inwall of loam cake 18b.Be provided with the oilhole 171b of reception from the lubricant oil of oil nozzle ejection with the corresponding position of oil nozzle on main shaft 17b, the interior oil duct of this oilhole and main shaft 17b is connected.On loam cake 18b, what be provided with annular oil groove 182b and allow lubricant oil sees through send oilhole 181b.During compressor operating, the gas of gas in the 195b of hyperbaric chamber and sealing cover 18b top has bigger pressure difference, make lubricant oil can send into the annular oil groove 182b of loam cake 18b again and send oilhole 181b positions such as lubricated Moving plate, quiet dish, pressing chamber by spray bar 16b ejection.

Fig. 9 and Figure 11 are respectively the structural representation of the 5th kind of mode of execution of the utility model ammonia refrigerating compressor and the 6th kind of mode of execution, the difference of these two kinds of mode of executions and first, second kind mode of execution is that the compression set that is adopted is piston type compressed device.Wherein, the stator of the 5th kind of mode of execution and the structure of rotor are identical with first kind of mode of execution, and the stator of the 6th kind of mode of execution and the structure of rotor are identical with second kind of mode of execution.Piston type compressed device 1d comprises plenum 10d, body 12d, connecting rod 13d, piston 14d, compression set housing 15d, air valve 16d, main shaft 17d, upper support bearing 18d, lower support bearing 19d and end cap 20d.The axis hole that rotor 2 is passed in piston type compressed upper end of installing the main shaft 17d of 1d is fixedlyed connected with rotor 2, and like this, when rotor 2 rotations, main shaft 17d can rotate thereupon, thereby drives piston type compressed device 1d work.Can connect main shaft 17d and rotor 2 by the key ways of connecting, also can adopt other Placement.Housing 4 is the calyptra of a lower ending opening, and its perisporium is set in the gap between stator 3 and the rotor 2.The opening portion of housing 4 is fixedly arranged on the oral area of eddy type compression set; 15d forms a seal chamber with the compression set housing; in compression member in rotor, rotor protecting jacket and the compression set housing is sealed in, thereby make the refrigerant vapor in the sealing chamber can not leak.Housing 4 is made by the nonmagnetic substance of anti-ammonia corrosion, as stainless steel, titanium etc.Between body 12d and the upper support bearing 18d, between body 12d and the lower support bearing 19d and interconnect by screw between lower support bearing 19d and the end cap 20d.Side at the external diameter of main shaft 17d is provided with a cam pin 173d, is unbalance inertia force and the moment that prevents main shaft 17d, is provided with equilibrium block 29 at the opposite side of the external diameter of main shaft 17d.The end of connecting rod 13d is enclosed within on the cam pin 173d, and the other end is connected with piston 14d by wrist pin.In a kind of preferred implementation, on main shaft 17d, be with the connecting rod 13d that two forming V-shapes are arranged, but be not limited thereto.On body 12d, be provided with the cylinder block 121d that directly on body 12d, processes.Piston 14d moves reciprocatingly in cylinder block under the drive of main shaft 17d and connecting rod 13d, and under the cooperation of air valve 16d, finish suction, the effect of compression and conveying gas.Figure 10 is the structural representation of the P part of Fig. 9, clearly show that the structure of piston 14d, air valve 16d and plenum 10d.Plenum 10d and cylinder block 121d are connected by the screw sealing, be provided with a dividing plate 103 in the neutral position of plenum 10d, dividing plate 103 is divided into left and right two cavitys with the space of plenum 10d, wherein, left side cavity surrounds an exhaust cavity 101 with air valve 16d again, right cavity 102 is connected with outlet pipe 6, is provided with several exhaust ports 103a on dividing plate 103.Piston 14d is moving in cylinder block 121d under the drive of connecting rod 13d, and the top of piston 14d is recessed shape.Between piston 14d and plenum 10d, be provided with air valve 16d.Air valve 16d comprises valve plate 16d1 and valve gap 16d2, is provided with a plurality of suction port 161d on the circumference of valve plate 16d1, is provided with a lug boss in the central position of valve plate 16d1, cooperates with the recessed portion of piston 14d, to reach the purpose that reduces clearance volume.Be provided with exhaust port 162d, exhaust valve plate 163d, spring sheet 164d on valve gap 16d2, spring sheet 164d is pressed on the exhaust valve plate 163d.When air-breathing, refrigerant vapor enters cylinder block 121d by the suction port 161d on the valve plate 16d1 again by the vestibule (not shown) of body 12d.During exhaust, overcome the compressive force of spring sheet 164d from the refrigerant vapor of cylinder block 121d discharge, back down exhaust valve plate 163d, enter into exhaust cavity 101 between air valve 16d and the plenum dividing plate 103 by the exhaust port 162d on the valve gap 16d2, hole 103a from the plenum dividing plate 103 enters right cavity 102 then, is discharged to outside the compressor by the outlet pipe 6 that is arranged on the compression set housing 15d again.Discharge by outlet pipe 6 again by two cavitys of plenum 10d continuously from the refrigerant vapor that cylinder block 121d discharges, guaranteed that exhaust pressure is more even on the one hand, have good noise elimination effect on the other hand.As Fig. 9 and shown in Figure 11, be provided with suction tude 5 in the side of compression set housing 15d.Be provided with lubricant oil in compression set housing 15d, the lubricated centrifugal pumping effect by the eccentric oil duct in main shaft 17d lower end of the utility model compressor carries out.Body 12d is rigidly connected by a plurality of chassis attachment post 122d and compression set housing 15d.Preferably, suction tude 5 and outlet pipe 6 are made by stainless steel.

Figure 12 and Figure 13 are respectively the structural representation of the 7th kind of mode of execution of the utility model ammonia refrigerating compressor and the 8th kind of mode of execution, the difference of these two kinds of mode of executions and first, second kind mode of execution is that the compression set that is adopted is the double-screw type compression set.Wherein, the stator of the 7th kind of mode of execution and the structure of rotor are identical with first kind of mode of execution, and the stator of the 8th kind of mode of execution and the structure of rotor are identical with second kind of mode of execution.Double-screw type compression set 1f comprises body 12f, compression set housing 15f, female rotor 16f, main shaft 17f, rolling bearing 18f.The male rotor in the double-screw type compression set 1f is served as in the bottom of main shaft 17f, and the axis hole that rotor 2 is passed in the upper end is fixedlyed connected with rotor 2, and like this, when rotor 2 rotations, main shaft 17f can rotate thereupon, works thereby drive double-screw type compression set 1f.Can connect main shaft 17f and rotor 2 by the key ways of connecting, also can adopt other Placement.Housing 4 is the calyptra of a lower ending opening, and its perisporium is set in the gap between stator 3 and the rotor 2.The opening portion of housing 4 is fixedly arranged on the oral area of eddy type compression set; 15f forms a seal chamber with the compression set housing; in compression member in rotor, rotor protecting jacket and the compression set housing is sealed in, thereby make the refrigerant vapor in the sealing chamber can not leak.Housing 4 is made by the nonmagnetic substance of anti-ammonia corrosion, as stainless steel, titanium etc.Closely be fixed together between body 12f and the compression set housing 15f.Exhaust end cap and air-breathing end cap that body 12f comprises cylinder 121f and is arranged at cylinder 121f two ends.The male rotor of female rotor 16f and main shaft 17f partly is arranged in the cylinder 121f, and rolling bearing 18 is arranged on air-breathing end cap and exhaust end covers, and is used to support female rotor 16f and main shaft 17f.Suction tude 5 is arranged on the side of compression set housing 15f.On suction tude 5, also be provided with air-breathing safety check 51f, its objective is in order preventing to stop the rotor reversing and to make the rotor tooth wearing and tearing.Be provided with lubricant oil in compression set housing 15f, the lubricated centrifugal pumping effect by the upper oil hole 171f among the main shaft 17f of the utility model compressor carries out.Lower end at main shaft 17f also is provided with oil strainer 172f.Preferably, suction tude 5 and outlet pipe 6 are made by stainless steel.The 7th kind of mode of execution and the 8th kind of shown double-screw type compression set of mode of execution have adopted vertical structure, also can adopt horizontal type structure.

In above-mentioned first to the 8th mode of execution, outlet pipe 6 is connected with an oil separator 60, be provided with an outlet pipe 602 in the upper end of oil separator 60, below outlet pipe 602, be provided with filter screen 603, to purify the ammonia steam of discharging from outlet pipe 6.Be provided with a return tube 601 in the lower end of oil separator 60, the other end of return tube 601 is connected with the bottom of compression set housing 15.The ammonia steam of discharging from outlet pipe 6 enters oil separator 60 separate through gas and oils after, the purified ammonia steam of separating is discharged by outlet pipe 602, the lubricant oil of separating sends back in the compression set housing by return tube 601, and the voltage supply compression apparatus recycles.Oil separator 60 can also play the effect of eliminating noise.

The utility model can adopt ammonia as refrigeration agent, can not destroy atmospheric ozone layer and produce greenhouse effect, has favorable environment protection and energy saving, and has advantages such as volume is little, compact structure.

Though description of the present utility model combines certain embodiments, but it should be understood by one skilled in the art that the utility model is not limited to embodiment described here, and can carry out various modifications and variations and do not deviate from spirit and scope of the present utility model.

Claims

1. an ammonia refrigerating compressor comprises stator, rotor, compression set, suction tude, outlet pipe and covers on the outer stator case of described stator; Described stator and described rotor coaxial setting, described rotor comprises permanent magnet, rotor core; Described compression set comprises compression member and covers on the outer compression set housing of described compression member, and described compression member comprises main shaft, and described main shaft is fixedlyed connected with described rotor; It is characterized in that:

Described suction tude and described outlet pipe are arranged on the described compression set housing;

Described ammonia refrigerating compressor also comprises a housing, described housing is the calyptra of a lower ending opening, the perisporium of housing is set in described stator and the described gap between rotor, the opening portion of described housing is fixedly arranged on the oral area of described compression set, form a seal chamber with described compression set housing, described compression member and rotor are arranged in the described seal chamber;

The lower end of described stator is fixed in the shade portion of lower end of described housing;

Described housing is made by nonmagnetic substance.

2. ammonia refrigerating compressor as claimed in claim 1 is characterized in that:

Described stator comprises the AC excitation winding;

Described rotor comprises cage type starting winding, and the permanent magnet of rotor adopts built-in tangential formula field structure.

3. ammonia refrigerating compressor as claimed in claim 1 is characterized in that:

Described stator comprises the DC excitation winding;

Be coated with the rotor protecting jacket on the outer wall of described rotor, described rotor protecting jacket is made by nonmagnetic substance;

Described ammonia refrigerating compressor also comprises the detecting apparatus for rotor position of the position that is used for detection rotor and controls the order of described DC excitation winding energising and the electronic commutation circuit block of time.

4. ammonia refrigerating compressor as claimed in claim 1 is characterized in that: described housing is made by the nonmagnetic substance of anti-ammonia corrosion.

5. ammonia refrigerating compressor as claimed in claim 1 is characterized in that: described compression set is the rolling rotor-type compression set.

6. ammonia refrigerating compressor as claimed in claim 1, it is characterized in that: described compression set is the eddy type compression set, described eddy type compression set is arranged on the below of described stator and described rotor, the compression member of eddy type compression set comprises loam cake, Moving plate, quiet dish and sealing cover, described Moving plate is positioned at the top of described quiet dish, be pressed in Jing Panshang, described quiet dish is pressed on the described sealing cover; The upper end of the main shaft of eddy type compression set is with a bearing, and the inwall of described bearing and described housing closely cooperates.

7. ammonia refrigerating compressor as claimed in claim 6 is characterized in that: be provided with spray bar in described eddy type compression set; The lower end of described spray bar is inserted in the lubricant oil that places described compression set housing bottom, and spray bar passes sealing cover, quiet dish and loam cake, covers on described to be provided with annular oil groove and to allow the oilhole that send that lubricant oil sees through; The oil nozzle of spray bar is positioned on the inwall of described loam cake; Be provided with the oilhole of reception from the lubricant oil of oil nozzle ejection with the corresponding position of described oil nozzle on the main shaft of eddy type compression set, the interior oil duct of described oilhole and described main shaft is connected.

8. ammonia refrigerating compressor as claimed in claim 1 is characterized in that: described compression set is piston type compressed device, and the compression member of described piston type compressed device comprises body, cylinder block, piston, connecting rod, air valve and plenum; Described plenum is connected with described cylinder block, and is connected with described outlet pipe, and described air valve is arranged between described cylinder block and the described plenum; Be provided with a dividing plate in described plenum, described dividing plate is divided into left and right two cavitys with the space of plenum, is provided with a plurality of exhaust ports on described dividing plate; The left cavity and the air valve of described plenum surround an exhaust cavity, and the right cavity of described plenum is connected with outlet pipe; The gas of discharging from described air valve enters outlet pipe by the right cavity of exhaust port on described exhaust cavity, the dividing plate and plenum.

9. ammonia refrigerating compressor as claimed in claim 1 is characterized in that: described compression set is the double-screw type compression set.

10. ammonia refrigerating compressor as claimed in claim 1 is characterized in that: described ammonia refrigerating compressor also comprises an oil separator, and described oil separator is connected with outlet pipe on being arranged on the compression set housing; The bottom of oil separator is provided with a return tube, and the top of oil separator is provided with an outlet pipe; Described return tube is connected with the bottom of described compression set housing.