CN105074210A

CN105074210A - Refrigerant compressor apparatus

Info

Publication number: CN105074210A
Application number: CN201480010906.XA
Authority: CN
Inventors: 霍尔格·巴特; 延斯·莫赫
Original assignee: BIZEL REFRIGERATION EQUIPMENT AG
Current assignee: BIZEL REFRIGERATION EQUIPMENT AG; Bitzer Kuehlmaschinenbau GmbH and Co KG
Priority date: 2013-02-27
Filing date: 2014-02-05
Publication date: 2015-11-18
Also published as: DE102013203268A1; EP2961985B1; WO2014131587A1; RU2015140918A; EP2961985A1; US20150361972A1; BR112015020228A2; RU2637608C2

Abstract

The invention relates to a refrigerant compressor apparatus. The apparatus comprises at least one low-pressure stage and at least one high-pressure stage, a suction duct leading from a suction connection for the refrigerant to the low-pressure stage, an intermediate-pressure duct leading from the low-pressure stage to the high-pressure stage, a high-pressure connection connected to the high-pressure stage, and a lubricant bath to which the intermediate pressure is applied in the intermediate-pressure duct. In order to improve such a refrigerant compressor system in such a way that an adequate lubricant supply for the low-pressure stage is always ensured, it is proposed that a lubricant-feeding device draws lubricant from the lubricant reservoir and feeds said lubricant to the suctioned refrigerant flowing to the low-pressure stage in a suctioning path.

Description

Refrigerant compressor arrangement

Technical field

The present invention relates to a kind of refrigerant compressor arrangement, it comprises at least one low pressure stage and at least one high pressure stage, the suction channel guided towards low pressure stage from the pumping surfaces departure place for refrigeration agent, the middle pressure channel guided from low pressure stage towards high pressure stage, the high voltage interface be connected with high pressure stage and the lubricant pool loaded with the intermediate pressure middle pressure channel.

Background technique

By being known to this refrigerant compressor arrangement in prior art.

In this refrigerant compressor arrangement, there is following problem, that is, in low pressure stage, especially in the valve of this low pressure stage, occur damage, this is because at least do not have sufficient oiling agent available in each running state.

Summary of the invention

Therefore, task of the present invention is, improves the refrigerant compressor arrangement pressing the type of generic, makes thus to guarantee there are enough oiling agents for low pressure stage all the time.

According to the present invention, in the refrigerant compressor arrangement of the type described in beginning, this task solves in the following way, that is, oiling agent extracts and flows to refrigeration agent that flow to low pressure stage, that be inhaled into by lubricant conveying appliance from lubricant reservoir.

Advantage according to solution of the present invention is, lubricant conveying appliance according to the present invention is utilized to have following possibility, namely, make full use of the pressure drop between the intermediate pressure of refrigerant compressor arrangement and swabbing pressure, and therefore make oiling agent from lubricant reservoir, flow to the refrigeration agent be inhaled into of low pressure stage, and bear especially to the lubrication of the abundance of the valve of low pressure stage.

Thinkable in principle, arbitrary position is carried oiling agent, as long as the refrigeration agent to being inhaled into can be carried.

But in order to oiling agent is as far as possible advantageously flowed to low pressure stage, preferred setting be, oiling agent is flowed to the suction path extended in apparatus casing of low pressure stage by lubricant conveying appliance, especially suction channel and/or the suction chamber of low pressure stage is flowed to, thus without the need to just can realize the conveying to oiling agent at apparatus casing outer installment assembly.

In particular, suction channel or suction chamber are also placed in apparatus casing.

In order to make the amount of the oiling agent flowing to the refrigeration agent be inhaled into can not be excessive at this, but remain in rational scope, preferred setting be, lubricant conveying appliance comprises metering unit, it carries out dosage to amounts of lubrication with depending on running state, thus utilize metering unit to have following possibility, that is, mate amounts of lubrication with depending on running state.

Such as arrange, limit different running statees and/or running state scope, and utilize metering unit to carry out dosage according to running state and/or running state scope to amounts of lubrication.

Just in each running state, carry out dosage advantageously, when compressor shutdown, stop by metering unit conveyor lubricant, therefore to avoid gathering oiling agent in suction path.

In addition advantage is, when compressor shutdown or from compressor shutdown, metering unit prevents and carry out pressure compensation via lubricant conveying appliance between outgoing route and lubricant pool.

Thus it is achieved that, by sucking the pressure difference maintained in path, make to accumulate in oiling agent in this suction path via leakage paths, such as in the region of corresponding pressure level, conveying is got back in lubricant pool, and therefore when the restarting of refrigerant compressor arrangement, in the region of operating valve, especially avoid oil to impact.

Via the dosage independently controlling can realize depending on running state arranged for this reason.

Another favourable solution is arranged, and metering unit by compression acc power controls, thus there is following possibility, that is, detect running state by compressor horsepower, and carry out dosage according to compressor horsepower to amounts of lubrication.

At this, metering unit can construct with different types and mode in principle.

Such as, metering unit can control with different types and mode with depending on compressor horsepower.

Such as there is following possibility, that is, control compressor horsepower by controlling to be used for the drive motor of refrigerant compressor arrangement, and utilize this control also electronically to control metering unit according to the control of drive motor.

But simple especially solution is arranged, and metering unit is controlled by compressor shaft, and carries out dosage according to the rotating speed of compressor shaft to amounts of lubrication.

With regard to the structure of metering unit itself, be not described in detail.

Therefore, metering unit such as can be configured to slide block or valve.

Simple especially solution is arranged, and metering unit is configured to proportioning pump.

Utilize this proportioning pump to there is following possibility with simple type and mode, that is, perform the dosage depending on power.

In particular, proportioning pump is preferably as follows and constructs in this wise, that is, it has the transport volume depending on rotating speed.

When being controlled by compressor shaft especially to drive proportioning pump, this point can be realized especially simply.

With regard to proportioning pump itself, be not so far described in detail.

Therefore, favourable solution is arranged, and proportioning pump is gear pump.

With regard to the oiling agent mass flow flowing to the refrigeration agent be inhaled into, preferred setting be, this mass flow cannot be made too large, this is because otherwise compressor horsepower and/or the durability of refrigerant compressor arrangement can be affected, this is because the oil pressure membership such as in active chamber causes driving load to raise.

Because this reason is preferably arranged, the oiling agent mass flow flowing to the refrigeration agent be inhaled into is 5% of the total mass flow be made up of refrigeration agent and oiling agent sucked by low pressure stage to the maximum.

With regard to the layout of metering unit, be not so far described in detail.

Therefore preferably arrange, refrigerant compressor arrangement has apparatus casing, and this apparatus casing is furnished with metering unit.

At this preferably, metering unit is arranged in the lid of apparatus casing, this is because metering unit can be encased in apparatus casing at this in a straightforward manner, wherein, metering unit is especially incorporated in lid.

In order to can simple as far as possible and protectorate structure lubricant conveying appliance; on apparatus casing; preferably covering; especially in apparatus casing; preferably in lid, be provided with the transport passage guided from metering unit to lubricant reservoir, there is following possibility by this transport passage; that is, oiling agent is transported from lubricant reservoir to metering unit.

In addition desirably, on apparatus casing, especially in apparatus casing, be provided with from metering unit to the transport passage for oiling agent sucking Route guiding, thus simple manufacture and assembling can be realized thus.

At this, transporting passage can only such as extend in apparatus casing in the lid of this apparatus casing.

But also there is following possibility, that is, transport channel part ground and partly extend in compressor assembly in apparatus casing, such as, extend in compressor shaft.

Under above-mentioned latter event, preferably also can also lubricate the bearing for compressor shaft targetedly by transport passage.

In order to oiling agent being flowed to the flow of refrigerant be inhaled into, especially advantageously, the nozzle sucking path and attached troops to a unit for the oiling agent sucking path will be flowed to is given.

With regard to the type in refrigerant compressor arrangement, refrigeration agent compressed, do not make the detailed description relevant to embodiment so far.

Thinkable in principle, be provided with various types of compressor, such as scroll compressor or helical-lobe compressor.

But, when refrigerant compressor arrangement comprises stroke type piston compressor, make the special advantage that solution according to the present invention has, this is because stroke type piston compressor has the suction valve responsive especially to wearing and tearing.

In addition, be proved to be advantageously in the structure of low pressure stage and high pressure stage, piston compressor comprises the first cylinder pedestal to form low pressure stage and comprises the second cylinder pedestal to form high pressure stage, thus low pressure stage and high pressure stage can be separated simply in the following way, that is, they are formed by the different cylinder pedestal of compressor.

In addition, with regard to the layout of lubricant reservoir, be not so far described in detail.

Such as lubricant reservoir can be exterior reservoir.

But simple especially solution is arranged, and lubricant reservoir is arranged in the actuator chamber of apparatus casing, wherein, is furnished with the drive unit for low pressure stage and high pressure stage in actuator chamber.

Especially arrange at this, lubricant reservoir is arranged in the bottom side of actuator chamber.

Other feature and advantage of the present invention are illustrated themes of explanation below and some embodiments.

Accompanying drawing explanation

Fig. 1 illustrates the side view according to refrigerant compressor arrangement of the present invention;

Fig. 2 illustrates the view of the refrigerant compressor arrangement in the direction along the arrow A in Fig. 1;

Fig. 3 illustrates the section along the line 3-3 in Fig. 2;

Fig. 4 illustrates the section along the line 4-4 in Fig. 3;

Fig. 5 illustrates the section along the line 5-5 in Fig. 2;

Fig. 6 illustrates the section along the line 6-6 in Fig. 2;

Fig. 7 illustrates the section along the line 7-7 in Fig. 6, and it has the diagram of the clean cut system of the cylinder sleeve of cylinder cap, valve plate and cylinder pedestal;

Fig. 8 illustrates the enlarged view of the section in Fig. 6 in the region of valve plate and suction valve;

Fig. 9 illustrates the plan view in the direction along the arrow A in Fig. 3;

Figure 10 illustrates the section along the line 10-10 in Fig. 9;

Figure 11 illustrates the view corresponding to Fig. 9, and it has the plan view of the proportioning pump according to the first embodiment;

Figure 12 illustrate the similar Fig. 3 of the second embodiment through refrigerant compressor arrangement according to the present invention longitudinal section and;

Figure 13 illustrates the section of the similar Figure 10 of the second embodiment through refrigerant compressor arrangement according to the present invention.

Embodiment

The embodiment of the refrigerant compressor arrangement 10 shown in Fig. 1 and Fig. 2 comprises overall with the apparatus casing of 12 marks, and this apparatus casing is 14 extensions along the longitudinal direction.

At this, apparatus casing 12 comprises the enclosure body 16 of central authorities, it 14 extends and on the first side, carries first end side cover 22 and on the second side, carry the second side lid 24 equally along the longitudinal direction, and this second side lid is such as also equipped with the flanged surface 26 for assembling transducer on its side away from the enclosure body 16 of central authorities.

As illustrated, the enclosure body 16 of central authorities comprises the drive shell section 32 of piston compressor 40, it surrounds actuator chamber 34, wherein, actuator chamber 34 extends between the first end side cover 22 and midfeather 36 of the enclosure body 16 of central authorities, between the drive shell section 32 that midfeather is placed in the enclosure body 16 of central authorities and motor casing section 42.

Motor casing section 42 for holding electric motor 50 comprises motor cavity 44, and motor cavity itself is placed in again midfeather 36 and the second side is covered between 24, and wherein, motor cavity 44 also extends into the second side lid 24 from motor casing section 42.

Be mounted with overall with the electric motor of 50 marks in motor cavity 44, this electric motor comprises the stator 52 be arranged in motor cavity 44 and the rotor 54 surrounded by stator 52, and wherein, rotor 54 can rotate around rotation axis 56.

For this reason, rotor 54 is placed in the entirety of piston compressor 40 with on the compressor shaft of 60 marks, compressor shaft carries rotor 54 with the rotor carrier segment 62 extended in motor cavity 44, and this compressor shaft supports this rotor in the mode can rotated around rotation axis 56.But compressor shaft 60 yet to extend in actuator chamber 34 and has the drive section 64 running through actuator chamber 34, and it carries multiple eccentric wheel 66.

Compressor shaft 60 itself to be bearing in the bearing accommodating part 72 be arranged on midfeather 36 and to be bearing in the bearing accommodating part 74 be arranged on first end side cover 22 in apparatus casing 12, thus the drive section 64 with eccentric wheel 66 is placed between bearing accommodating part 72 and 74, and rotor carrier segment 62 extends in motor cavity 44 with free end from bearing accommodating part 72.

As illustrated, the drive section 64 of compressor shaft 60 is by the multiple cylinders 82 of its eccentric wheel 66 in order to driven plunger compressor 40, these cylinders such as with the arranged in form of two cylinder pedestals 84 and 86 in drive shell section 32, wherein, wherein each cylinder 82 has cylinder chamber 92, piston 94 can move along stroke direction 96 in cylinder chamber, and wherein, the cylinder sleeve 98 that such as each cylinder chamber 92 is positioned in drive section surrounds.

Each piston 94 is driven by connecting rod 102 itself, and connecting rod side is articulatedly bearing on piston 94, and opposite side surrounds eccentric wheel 66.

The cylinder chamber 92 of each cylinder pedestal 84 and 86 is closed by valve plate 104 or 106, and wherein, corresponding valve plate 104 or 106 carries cylinder cap 112 or 114 on its side away from corresponding cylinder sleeve 98.

Cylinder cap 112 is attached troops to a unit in the first cylinder pedestal 84, and cylinder cap 114 is attached troops to a unit in the second cylinder pedestal 86.

Such as, each valve plate 104,106 and each cylinder cap 112 and 114 overlap the whole cylinder chamber 92 of the cylinder 82 of corresponding cylinder pedestal 84 or 86.

In refrigerant compressor arrangement 10 according to the present invention, as shown in figure 1 and figure 5, such as be provided with suction break valve 122, this suction break valve itself is equipped with pumping surfaces 124, and this suction break valve is such as assemblied on first end side cover 22, and the refrigeration agent that will suck is flowed to the suction channel 126 be arranged in first end side cover 22 and drive shell section 32, suction channel itself extends until the first cylinder pedestal 84 from suction break valve 122, wherein, suction channel 126 has run through the breach 128 in drive shell section 32, this breach aligns with the breach 132 in valve plate 104, thus sucked refrigeration agent can be discharged from drive shell section 32 and penetrate valve plate 104 and the suction chamber 134 of cylinder cap 112 can be entered into, as Fig. 3, shown in Fig. 6 and Fig. 7.

In particular, suction channel 126 and suction chamber 134 form the suction path 130 of refrigeration agent for being inhaled into be arranged in apparatus casing 12.

But, also simple aspiration interface can be set replace suction break valve 122 by twisting to connect or be connected.

Suction chamber 134 is placed in corresponding valve plate 104, on the side away from cylinder chamber 92 of 106, and be placed in and be arranged in corresponding valve plate 104, in 106 for corresponding cylinder pedestal 84, on the suction opening 136 of all cylinders 82 of 86, wherein, operating valve or suction valve 138 is had in attaching troops to a unit on the side in cylinder chamber 92 of each suction opening 136, it to be such as arranged on valve plate 104 and to comprise suction diaphragm or clack valve 140, suction diaphragm or clack valve in figures 7 and 8 solid line indicate, closed and be resisted against closed-suction opening 136 in the position on valve plate 104, and discharge suction opening 136 in the position of opening that dotted line indicates in figures 7 and 8, thus refrigeration agent can be drawn in cylinder chamber 92 by suction opening.

In order to determine the movement of clack valve 140, in side, valve plate 104 is used in the operating position of clack valve 140, and at opposite side, such as in the cylinder flange 144 of cylinder sleeve 98, be provided with guide recess 142, corresponding clack valve 140 is embedded in this guide recess with the tip of the tongue 146, thus the tip of the tongue 146 is guided in guide recess 142 when it moves between operating position and open position.

In order to determine the maximum open position of clack valve 140, guide recess 142 is equipped with stop surface 148 especially shown in Figure 8, that define the maximum open position of clack valve 140, that is, the maximum position away from valve plate 104, thus make the guide recess 142 with stop surface 148 form stroke limiter.

At corresponding cylinder cap, in cylinder cap 112 in figures 7 and 8, also to have attached troops to a unit pressure chamber 152 oppositely with suction chamber 134, this pressure chamber is formed in cylinder cap 112 equally, wherein, in pressure chamber 152, be furnished with the in column outlet valve 154 be such as placed on valve plate 104, they can discharge equally and flow out opening, thus make compressed refrigeration agent can enter into pressure chamber 152 from cylinder chamber 92.

The cylinder 82 of cylinder pedestal 86 constructs valve plate 104 and 106 in the mode that the cylinder 82 with cylinder pedestal 84 is identical, wherein, especially also correspondingly constructs valve plate 106 and cylinder cap 114.

As especially in figures 4 and 5, the refrigerant compressor arrangement with two cylinder pedestals 84 and 86 carrys out work as the compressor of two-stage type, that is, first the refrigeration agent be inhaled into is compressed to intermediate pressure PZ by the cylinder 82 forming low pressure stage 156 of the first cylinder pedestal 84 when swabbing pressure PS, then flow in motor cavity 44, percolation is crossed motor cavity 44 and is entered into the middle pressure channel 162 of drive shell section 32 from this motor cavity, thus the refrigeration agent of the pressure P Z that makes to mediate can enter into the suction chamber 134 of the cylinder cap 114 of cylinder pedestal 86, and be finally compressed to high pressure P H by the cylinder 82 of the formation high pressure stage 158 of the second cylinder pedestal 86, wherein, the refrigeration agent being in high pressure P H can be discharged subsequently from high voltage interface 164.

In order to avoid damaging suction valve 138 (damage shown such as is that clack valve 140 especially occurs the fracture that occurs at least in part due to the collision on valve plate 104 and/or stop surface 148 of clack valve 140 and/or the tip of the tongue 146 along with time history in the region of its tip of the tongue 146), be provided with overall with the lubricant conveying appliance of 170 marks, it extracts oiling agent by the first transport passage 176 be such as arranged in first end side cover 22 and the filter 178 be connected in before this first transport passage from the lubricant pool 174 that the bottom section 172 via actuator chamber 34 is formed, and this oiling agent is flowed to metering unit 180 (Fig. 3 via transport passage 176, Fig. 9 to Figure 11).

Oiling agent from metering unit 180 via shown in Fig. 6 and Fig. 9 to Figure 11 and be arranged on second first end side cover 22 and transport passage 182 and be also arranged in the nozzle 186 that this second filter 184 transported in passage flows to sensing suction channel 126, utilize nozzle, oiling agent can be injected to by the suction channel 126 of the refrigeration agent institute percolation be inhaled into, thus the oiling agent be injected in suction channel 126 be carried by the refrigeration agent being sucked and at least carries to suction valve 138 to lubricate this suction valve.

Have the pressure difference for being transported oiling agent by lubricant conveying appliance 170 in the following way, namely, in actuator chamber 34, have the pressure higher than swabbing pressure PS corresponding to intermediate pressure PZ, thus this pressure difference is enough for being transported to nozzle 186 from lubricant pool 174 by oiling agent.

Therefore, metering unit 180 does not necessarily produce pressure difference, but the rotating speed that the power being mainly used in depending on refrigerant compressor arrangement depends on compressor shaft 60 in the simplest situations realizes the dosage to oiling agent.

The oiling agent of this conveying especially forms oiling agent coating in the region of valve plate 104 and in the region of the stop surface 148 of guide recess 142, the shock of the tip of the tongue 146 on valve plate 104 and/or on stop surface 148 of clack valve 140 and clack valve 140 has been cushioned, therefore to avoid rupturing in the region of the tip of the tongue 146 and/or clack valve 140 by lubricious coatings.

In order to design metering unit 180 as far as possible simply, it can the controlled valve of the amount of being.

In particular, metering unit 180 is configured to have and depends on rotating speed, the proportioning pump 190 of especially proportional with rotating speed transport volume, it connects with compressor shaft 60, and therefore synchronously driven with compressor shaft 60, to design the dosage proportional with the rotating speed of compressor shaft 60 being injected to the oiling agent in suction channel 126 via nozzle 148.

As illustrated in fig. 11, proportioning pump 190 is configured to gear pump, it has with the ectosome 192 of inner teeth with accordingly with the endosome 194 of external teeth, endosome can rotate around the axis 196 of eccentric hitching post 198 on the one hand, wherein, rotation axis 56 ground that eccentric hitching post itself is eccentric in compressor shaft 60 is arranged and is shaped on compressor shaft 60, thus is directly realized the driving of the endosome 194 to gear pump 190 by compressor shaft 60.

At this, ectosome 192 and endosome 194 construct as follows relative to each other, namely, transfer to form free chamber 202 between body 192 and endosome 194 outside by the bias week of eccentric hitching post 198, by the eccentric motion of eccentric hitching post 198, this free chamber is moved in the mode had enough to meet the need around the rotation axis 56 of compressor shaft 60, thus make the oiling agent by transporting passage 176 conveying enter into the free chamber 202 of formation through entrance pocket portion 204, and by free chamber 202 rotate rotation axis 56 motion to outlet pocket portion 206 transport, this outlet pocket portion is connected with transport passage 182, thus by this transport passage, oiling agent can be flowed to the nozzle 186 pointing to suction channel 126.

At this, build gear pump 190 as follows, namely, to move and therefore in the out-of-work situation of endosome 194 in eccentric hitching post 198 rotation axis 56 that no longer rotates, the prevention of this gear pump carries out oiling agent transport by lubricant conveying appliance 170, and therefore, in the out-of-work situation of compressor shaft 60, block oiling agent and carried to suction channel 126.

The advantage of this point is, when to compressor shaft 60 stop drive and be therefore also shut down at piston 94, no longer including oiling agent can flow into suction channel 126 from lubricant pool 174, this is because this block by proportioning pump 190.

In addition; when compressor shaft 60 is shut down and therefore endosome 194 is shut down; the pressure that proportioning pump 190 has yet blocked in suction channel 126 reduces; thus the oiling agent making still to be present in suction channel 126 is via other paths, such as, leak in the region of the piston 84 of cylinder pedestal 84,86 refluxes to lubricant pool 174.

Also there is following advantage in this; namely; therefore possibility is deposited: when refrigerant compressor arrangement according to the present invention is shut down; prevent the spilling that suction channel 126 occurs with oiling agent; and the pressure maintained in suction channel 126; so that the oiling agent in suction channel 126 flows to again lubricant pool 104 via the leak such as in the region of cylinder pedestal 84,86, and therefore avoid oil impact when refrigerant compression equipment is restarted.

In the first embodiment of solution according to the present invention, lubricant conveying appliance 170 is incorporated in first end side cover 22, thus especially make transport passage 176 be placed in first end side cover 22 with the transport passage 182 with nozzle 184, and filter 178 and 184 is preferably made equally also to be placed in first end side cover 22.

In addition advantageously, the first lid 22 also comprises the accommodating part 212 of the ectosome 192 for proportioning pump 190, and wherein, entrance pocket portion 204 and outlet pocket portion 206, in side, are especially passed in this accommodating part 212 between bearing accommodating part 74 and accommodating part 212.

Ectosome 192 is placed in accommodating part 212 in anti-mode in relative rotation, and subsequently endosome 194 is placed in this ectosome, endosome is bearing on eccentric hitching post 198 in the mode can rotated around axis 196 with method in the said manner, and the rotation axis 56 that therefore rotates together with eccentric hitching post 198 is had enough to meet the need.

In the second embodiment of refrigerant compressor arrangement according to the present invention, feature consistent with those features being equipped with identical reference character of the first embodiment shown in Figure 12 with Figure 13, thus in this respect also can all with reference to the embodiment of the first embodiment.

Especially as in the first embodiment, in an identical manner lubricant pool 174 is set in actuator chamber 34, lubricant conveying appliance 170 ', extracts oiling agent by the transport passage 176 be arranged in first end side cover 22 more precisely from this lubricant pool.

As in the first embodiment, in first end side cover 22, be equally also provided with the metering unit 180 formed by proportioning pump 190 in an identical manner, and construct in the same manner as described relatively with the first embodiment.

But, proportioning pump 190 is not be transported to by oiling agent in the other transport passage extended in first end side cover 22, but be transported to preferably coaxial in rotation axis 56 and in the compressor shaft passage 222 extended in compressor shaft 60 ', wherein, from the region of the bearing accommodating part 72 ' of compressor shaft passage 222 midfeather 36 ', there is crosspassage 224 to guide the pockets 226 around compressor shaft 60 ' to being arranged in bearing accommodating part 72, transport passage 228 and midfeather 36 ', in drive shell section 32 ', extend to nozzle 232 from this pockets again, nozzle leads in the suction channel 126 ' in drive shell section 32 '.

In addition, compressor shaft passage 222 is equipped with other crosspassage, wherein, such as, crosspassage 242 is for the sliding bearing 244 between lubricate compressors axle 60 ' and bearing accommodating part 74, crosspassage 246 is for lubricating the sliding bearing 248 between eccentric wheel 66 and connecting rod 102, and crosspassage 252 is for the sliding bearing 254 between lubricate compressors axle 60 ' and bearing accommodating part 72 '.

Therefore, according to lubricant conveying appliance 170 ' of the present invention not only for giving transfer passage 126 ' conveyor lubricant, to realize the effect described relatively with the first embodiment in the region of suction valve 138, but also for providing oiling agent to the bearing 244,248,254 in the region of compressor shaft 60 '.

In a second embodiment, except lubricating different sliding bearings, also achieve those advantages as described in detail relatively with the first embodiment.

Claims

1. a refrigerant compressor arrangement, it comprises

At least one low pressure stage (156) and at least one high pressure stage (158), the suction channel (126) guided towards described low pressure stage (156) from pumping surfaces (124) departure place for refrigeration agent, the middle pressure channel (162) guided from described low pressure stage (156) towards described high pressure stage (158), the high voltage interface (164) be connected with described high pressure stage (158) and with the lubricant pool (174) loaded with the intermediate pressure (PZ) described middle pressure channel (162)

It is characterized in that, oiling agent extracts and flows to refrigeration agent that be inhaled into, that flow towards described low pressure stage (156) in suction path (130) by lubricant conveying appliance (170) from described lubricant reservoir (174).

2. refrigerant compressor arrangement according to claim 1, it is characterized in that, oiling agent is flowed to the suction path (130) extended in apparatus casing (12) of described low pressure stage (156) by described lubricant conveying appliance (170).

3. the refrigerant compressor arrangement according to any one of the claims, it is characterized in that, described lubricant conveying appliance (170) comprises metering unit (180), and described metering unit carries out dosage to amounts of lubrication with depending on running state.

4. refrigerant compressor arrangement according to claim 3, is characterized in that, described metering unit (180) is that acc power controls by compression.

5. refrigerant compressor arrangement according to claim 1, is characterized in that, metering unit (180) is controlled by compressor shaft (60).

6. the refrigerant compressor arrangement according to any one of the claims, is characterized in that, described metering unit (180) is configured to proportioning pump (190).

7. refrigerant compressor arrangement according to claim 6, is characterized in that, described proportioning pump (190) has the transport volume depending on rotating speed.

8. the refrigerant compressor arrangement according to claim 6 or 7, is characterized in that, described proportioning pump (190) is gear pump.

9. the refrigerant compressor arrangement according to any one of the claims, it is characterized in that, the oiling agent mass flow flowing to the refrigeration agent be inhaled into be to the maximum sucked by described low pressure stage (156) there is 5% of the total mass flow of the refrigeration agent of oiling agent.

10. the refrigerant compressor arrangement according to any one of the claims, is characterized in that, described refrigerant compressor arrangement has apparatus casing (12), and described apparatus casing is furnished with described metering unit (180).

11. refrigerant compressor arrangements according to claim 10, is characterized in that, described metering unit (180) is arranged on the lid (22) of described apparatus casing (12).

12. refrigerant compressor arrangements according to claim 11, is characterized in that, described metering unit (180) is incorporated in described lid (22).

13. refrigerant compressor arrangements according to claim 11 or 12, it is characterized in that, described apparatus casing (12) is provided with the transport passage (176) guided from described metering unit (180) towards described lubricant reservoir (174).

14. according to claim 11 to the refrigerant compressor arrangement according to any one of 13, it is characterized in that, described apparatus casing (12) is provided with for oiling agent, the transport passage (182) that guides towards described suction path (130) from described metering unit (180).

15. refrigerant compressor arrangements according to any one of the claims, is characterized in that, attached troops to a unit for the nozzle (184) to described suction path (130) conveyor lubricant to described suction path.

16. refrigerant compressor arrangements according to any one of the claims, it is characterized in that, described refrigerant compressor arrangement (10) comprises piston compressor (40).

17. refrigerant compressor arrangements according to claim 16, it is characterized in that, described piston compressor (40) comprises the first cylinder pedestal (84) to form described low pressure stage (156) and comprises the second cylinder pedestal (86) to form described high pressure stage (158).

18. refrigerant compressor arrangements according to any one of the claims, it is characterized in that, described lubricant reservoir (174) is arranged in the actuator chamber (34) of described apparatus casing (12).

19. refrigerant compressor arrangements according to claim 18, is characterized in that, described lubricant reservoir (174) is arranged in the bottom side of described actuator chamber (34).