CN102428276A

CN102428276A - Screw compressor specially suitable to be connected in parallel in compression units

Info

Publication number: CN102428276A
Application number: CN2009801591519A
Authority: CN
Inventors: 斯特凡诺·巴扎托
Original assignee: Refcomp SpA
Current assignee: Fujian Snowman Co Ltd
Priority date: 2009-04-06
Filing date: 2009-04-06
Publication date: 2012-04-25
Also published as: WO2010116388A1; EP2417357A1

Abstract

Compressor comprising a body (2) in which it is possible to identify: an intake (3) for a fluid made up of a mixture of gas (G) and auxiliary fluid (L); compression means (5) located downstream of the intake (3); a separation chamber (6) downstream of the compression means (5) to separate the gas (G) from the auxiliary fluid (L); a duct (7) placing the area (54) downstream of the compression means (5) in communication with the separation chamber (6); an auxiliary circuit (8) comprising a pipe (81) connected between the separation chamber (6) and the area (53) upstream of the compression means (5) that makes the auxiliary fluid (L) return into the compression means (5); a delivery outlet (4) connected to an outlet duct (102) of the compressed gas (G). A check valve (10) is inserted in the duct (7) that places the compression means (5) in communication with the separation chamber (6) and a solenoid valve (11) is inserted in the pipe (81) of the auxiliary circuit (8).

Description

The helical-lobe compressor that is particularly suitable in compression unit, being connected in parallel

Technical field

The present invention relates to a kind of be particularly suitable for being included in be used for regulating and reduce the air conditioning of the temperature in the enclosed space or the improved positive displacement compressor of refrigeration system.

The invention still further relates to a kind of compression unit that obtains through two or more above-mentioned compressor that are connected in parallel.

At last, the present invention relates to a kind of air conditioning or refrigeration system that comprises said compression unit.

Background technique

As everyone knows, under many circumstances, for example, need to be used to regulate and reduce the refrigeration system of the temperature in the enclosed space.

Particularly; Under the situation of refrigerator or information technology chamber (IT room); Must temperature be remained on certain level; Thereby in first kind of situation, can preserve degradable product as far as possible for a long time, and in second kind of situation, must prevent that electronic equipment is overheated to guarantee the maximum function of electronic equipment.

Above-mentioned refrigeration system comprises one or more compression device basically; This compression device is called compressor in technical term; This compression device pressurizes to cryogenic fluid, makes this cryogenic fluid pass and belongs to system itself and be arranged in a plurality of pipe circulations in the sealing place to be cooled.

In addition, well-known, under many circumstances,, single compression device is provided in order to implement to be characterised in that the refrigeration system of simple and linear configurations, this list compression device is conditioned by means of the control apparatus that in technical term, is called " transducer (inverter) ".

In the compressor of other types, use guiding valve to replace converter apparatus, this guiding valve is disposed in the compressor itself and makes it possible to mechanically regulate the flow (flow rate) of fluid to be compressed.

Yet this replacement causes the significant deficiency that is revealed by following fact object: the adjusting that flow carried out to the fluid of discharging compressor does not allow to obtain to compare favourably with through using the accurate level of the accurate level that transducer guaranteed.

Be used for the other method that the flow of the fluid of discharging compressor is regulated is to use so-called " bypass " system.

This system allows the compressed fluid of part to turn back in the compressor, so that restriction is incorporated into the amount of the above-mentioned fluid in the refrigeration line.

In this case, regulating also can't be the same accurate with the adjusting of implementing through transducer, and in addition, the loss that is caused by the following fact is also arranged on performance: segment fluid flow is compressed, and is not conditioned subsequently or the refrigeration cycle use.

Particularly; With regard to converter apparatus; It makes it possible to adjust the amplitude and the frequency of the electrical signal that is suitable for compressor apparatus is controlled, so that change the running speed of compressor apparatus, and allows that therefore the flow of the cryogenic fluid through said pipe produces difference.

In fact, the above-mentioned variation of the flow of cryogenic fluid makes possibly revise the set temperature levels in the sealing place, and therefore feasiblely controls and regulate whole refrigeration system easily more accurately.

This demand occurs in that for example information technology is indoor, this is due to the following facts: in most of the cases for be no less than year at interval in, it is indoor that various types of processing equipmenies are embedded into and are arranged in information technology.

In fact, in this case, need not make this refrigeration system running with the maximum rated power of refrigeration system in the incipient stage.

Particularly, when all electronic equipments all had been arranged according to plan, refrigeration system started with predetermined basal temperature at the beginning, and temperature gradually changes up to arriving specified operating condition then.

But, above-mentioned configuration and refrigeration system, particularly the said operation mode of compressor can cause hereinafter described major defects.

First defective be used for expensive relevant to the converter apparatus regulated at the employed high-power compressor of these specific refrigeration systems.

In fact, the commercial cost of converter apparatus almost is index ground usually along with the increase of the peak output of compressor increases.

Second important defective is: when compressor with when specified operating condition compares speed work low, the energy consumption and the heat dissipation of compressor are higher.

Thereby; The lasting existence of said defective lets the most of MANUFACTURERs of said refrigeration system with two single compressors that compressor replaces having given peak output that are connected in parallel, and each compressor in said two compressors that are connected in parallel all has power half the of the compressor described in the earlier examples.

This system is configured through interconnecting respectively with the inlet of two compressors and with delivery outlet, so that the essentially identical compression horsepower of compression horsepower of acquisition and above-mentioned configuration has the advantage that has overcome said defective simultaneously.Particularly, because each compressor in two compressors all has the half the maximum rated power for the power of single compressor, so possibly overcome the expensive problem that embodies by the transducer that is used to control two compressors.

In addition, the above-mentioned refrigeration system most of the time uses with peak output, therefore two all rate work at full speed of compressor; Or use with a half-power, this means a compressor with maximum rating work, and another compressor stops fully.

In addition, conversion service cycle is arranged, for example between the starting period of information technology chamber, need minimum value and maximum rating 50% between adjustment and regulate the power of said system.

Thereby, clearly,, thereby guaranteed saving further owing to there is not another transducer because this configuration comprises that the single converter that is applied to a compressor in two compressors is enough.

In addition; Compare with the middle operating condition that under the situation of the configuration that only has a compressor, produces; The foregoing following fact has been guaranteed considerable saving aspect energy consumption and heat dissipation: system's most of time is with full power operation, and two compressors are all opened; Perhaps replacedly, system's most of time turns round with a half-power, this means to have only a compressor with maximum rated power work.

As everyone knows,, need take some measures, so that avoid any general fault of whole refrigeration system for two compression devices that can be connected in parallel.

Particularly, be under the situation of positive displacement helical-lobe compressor at compression device, need be employed in the measure of hereinafter describing in detail more and come the said system that is called as " series connection (tandem) " system is configured.

At first, in order to understand the technology of two helical-lobe compressors that are used to be connected in parallel, the structure of describing single volume formula helical-lobe compressor is important.

Above-mentioned compressor comprises the body of being processed by metallic material basically, on this body, possibly identify at ingress and the import and the delivery outlet that link to each other with the remaining part of refrigeration system in the outlet port.

In addition, metal body within it portion partly comprise the compression set of forming by one or more screw rod of the form that as said, has in the literary composition to be considered.

Above-mentioned one or more screw rod locates to demonstrate the device that allows screw rod itself to center on the bearing shape of its longitudinal axis rotation at its height (level) that is hinged to the end of compressor metal body.

Particularly, said compression set can comprise single compression rotor, and this list compression rotor is called " single screw rod " in technical term, and perhaps, said compression set can be implemented by enough intermeshing two screw rods.

What can not get rid of is: in various embodiment, said compression set can be provided with the screw rod more than two.

The function of above-mentioned compression set is to receive low-pressure fluid in the ingress, and compresses this low-pressure fluid so that it is much higher in outlet pressure.

The said outlet of compression set is connected with the separation chamber through pipeline, and in this separation chamber, the material that constitutes above-mentioned high-pressure liquid is separated.

In fact; Refrigerant gas and auxiliary liquid that the fluid of the inlet of arrival compression set is crossed refrigeration system by Continuous Flow are formed; Wherein, said auxiliary liquid is required for lubricated especially above-mentioned bearing, to reduce friction and to cool off above-mentioned bearing; Because it is heating during turning, and the tightness between the final screw rod that guarantees to mesh.

Particularly, in the structural type of being considered in the text, said auxiliary fluid is an oil.

Therefore separation process is very important, and this is due to the fact that like preceding text has explained that the delivery outlet that refrigerant gas passes the compressor that is positioned at the downstream, separation chamber flows out, and be introduced in the refrigeration system; And auxiliary fluid is transferred so that it passes the beginning that the auxiliary line that above-mentioned separation chamber is connected with the inlet of compression set turns back to compression cycle.

Because the pressure difference that between different chambers, produces, produced the pipe of refrigerant gas from the compressor to the system displacement and the inlet of auxiliary fluid from the separation chamber to the compression set displacement the two.

In fact, auxiliary fluid is transported to the area of low pressure that overlaps with the inlet of compression set from the high-pressure area of being made up of the separation chamber.

Auxiliary line is provided with at least one jar that is suitable for the auxiliary fluid that is present in the compressor is stored.

Defined the characteristic of positive displacement helical-lobe compressor, now can be to being used so that can the interconnective requisite measure of two or more compression devices in the above-mentioned compression device be described.

Follow above-mentioned first problem that takes place that is connected in parallel to be: the refrigerant gas of the delivery outlet of outflow compressor is to return towards the delivery outlet of second compressor with the direction in the opposite direction that runs well.

It is when turn-offing that this situation can occur in on-stream and another compressor of a compressor in two compressors that are connected in parallel.

Particularly, be under the high pressure with the corresponding zone of outlet of compressor of operation, and the zone of the delivery outlet of out-of-operation compressor is under the low pressure, therefore, has seen that like us gas is tending towards flowing to second compressor from first compressor.

This can cause above-mentioned refrigerant gas is incorporated in the compressor of shutoff, also causes the compression set court and the direction in the opposite direction that runs well to be rotated.

This situation can cause above-mentioned compression set stall, makes to be necessary replacement part.

For fear of this trouble, have in the downstream of the delivery outlet of each compressor and only to allow compressed gas to flow out and prevent any towards rightabout mobile safety check.

Follow contingent second problem of such compressor that is connected in parallel to come from the following fact: in the separation chamber, from refrigerant gas, to separate auxiliary fluid and do not take place with perfect mode.

This means that have a small amount of auxiliary fluid within the refrigerant gas in flowing into system's pipe, and then this a small amount of auxiliary fluid turns back in the compressor again at the end of cool cycles.

Under the situation that two compressors are all opened, following situation can take place: because the fine distinction of the running of two compressors and the fine distinction of resultant force value, said a small amount of auxiliary fluid only turns back in the compressor.From long-term perspective, this situation repeat the variation that generation can cause being present in the height of the auxiliary fluid in the compressor continuously, the risk that makes a stall in the compressor is arranged.

In order to solve said problem, thereby be necessary to be connected with each other, therefore avoid the difference between any two height so that utilize law of connected vessels through the storage tank (sump) of pipe with compressor.

Carry out aforesaid operations and allow the problem that height embodied of solution by auxiliary fluid, but then, this has caused another defective that produces when a compressor in two compressors stops.

In fact, as described, in the compressor that is in operation, auxiliary fluid separated from the gas is tending towards flowing to the area of low pressure.

In this case, because two storage tanks interconnect, so auxiliary fluid also is tending towards flowing in the storage tank of the compressor that stops through above-mentioned connecting tube except turn back to the upper reaches of compression set through auxiliary line.

If this situation continues, more excessive risk is then arranged as follows: the height place of the compressor that is in operation uses up auxiliary fluid, and this can make latter's stall.

In addition, second counter productive is: because said pressure difference, the excessive auxiliary fluid of in the storage tank of the compressor that stops, assembling is tending towards flowing to through auxiliary line the upper reaches of compressor set.

When the compressor that formerly stops to restart along with the rotation of compression set, above-mentioned excessive auxiliary flow was known from experience the permanent damage that causes mechanical component.

In order to overcome these defectives; According to known structural type, stop valve is disposed in the height place of the pipe of two storage tanks of above-mentioned connection, and when a compressor in two compressors turn-offs; Said stop valve is activated, so that stop passing through of auxiliary fluid.

Particularly, in this case, because sizable size of the diameter of connecting tube, and owing to when two compressors all turn round, do not have this fact of pressure difference between two storage tanks, so valve can not be electromagnetic type (solenoid type).

In fact, in this case, be necessary to use more complicated, and thereby expensive more valve, for example booster valve and/or servo Auxiliary valves.Therefore, has the expensive major defect that embodies known technology more than the valve of the required the above-mentioned type of the correct running of system of one compressor.

In addition, if said valve is not worked rightly, will be suitable for not preventing that auxiliary fluid from leading to other safety installation of another compressor from a compressor.

Another defective of described structural type is made up of the quite complicated hinged system that is used to connect two compressors.

Summary of the invention

The object of the invention is to overcome above listed defective.

Particularly, first purpose of the present invention is: develop a kind of positive displacement compressor, this positive displacement compressor need not to introduce under the situation that outer member guarantees correct overall operation and can be connected in parallel with other compression devices of same type.

Therefore, other purpose of the present invention is: implement a kind of positive displacement compressor, the feasible extra cost that possibly reduce and/or avoid being used to implementing this positive displacement compressor is connected to other compressors of same type of this positive displacement compressor.

Another object of the present invention is that to propose compressor that beguine implements according to known technology safer and more be not easy to injured positive displacement compressor.

For this reason, other purpose of the present invention is: implement a kind of positive displacement compressor, this positive displacement compressor portion within it prevents that partly auxiliary fluid and the compressed gas court direction opposite with correct rotation direction from returning.

Of the present invention another but also be that the purpose of no less important is: implemented a kind of compressor; The structure of this compressor makes that when this compressor parallel was connected to other compression devices of same type, the height of the auxiliary fluid in this positive displacement compressor remained unchanged basically.

Above-mentioned purpose realizes through the positive displacement compressor of implementing according to main claim.

The more details of compressor are described in the dependent claims.

Dependent claims comprises the more characteristic of compressor; And the more characteristic that has comprised the compression system that includes two or more above-mentioned compressor that are connected in parallel; And finally also comprised the adjusting of said compression system or the more characteristic of refrigeration system, so that realized the purpose of setting.

Advantageously, possibly obtain more flexible and economic system as the compressor of theme of the present invention is feasible.

Description of drawings

With reference to accompanying drawing, above-mentioned purpose and advantage will be to of the present invention, outstanding in further detail in being provided as the description that preferred embodiment carried out of schematic and nonrestrictive example, in the accompanying drawings:

Fig. 1 illustrates the axonometric drawing as the improved compressor of theme of the present invention;

Fig. 2 illustrates the schematic representation as the improved compressor of theme of the present invention;

Fig. 3 illustrates the axonometric drawing as first section of the compressor of theme of the present invention;

Fig. 4 illustrates the axonometric drawing as second section of the compressor of theme of the present invention;

Fig. 5 illustrates the axonometric drawing as the compressor unit of theme of the present invention, and this compressor unit comprises two improved compressors that are connected in parallel;

Fig. 6 is the schematic representation as the compression unit of theme of the present invention;

The schematic representation that Fig. 7 illustrates is of the present invention, comprise the refrigeration system that also belongs to compression unit of the present invention.

Embodiment

Improved compressor as theme of the present invention intactly illustrates in Fig. 1 and Fig. 2, and wherein said improved compressor is represented with 1.

In Fig. 2, can observe, describe in the text with the structural type that embodied in, as theme of the present invention and compression that cause cryogenic fluid and compressor 1 that cryogenic fluid is incorporated in the refrigeration system screw type is arranged.

In other structural types of not describing in the text, compressor 1 can be used for compressed fluid and with fluid be incorporated into the dissimilar system of refrigeration system in.

In addition; In interchangeable structural type, as the compressor 1 of theme of the present invention screw type can not arranged, but as previously discussed; Can be provided with the different compression device, as long as this compressor 1 has kept the key character described in the main claim.

Important this compressor 1 that is characterised in that of another of compressor 1 described in the literary composition is " compact type " screw type, and it will be shown in further detail hereinafter.

In Fig. 1; Can notice; Compressor 1 of the present invention comprises the outer body of being processed by metallic material 2; Externally can identify the inlet 3 that is connected with the inlet pipe 201 of low-pressure fluid Fb during the universal system 200 shown in Figure 7 installing on the body 2, as by shown in the arrow, and can identify and be placed with the delivery outlet 4 that is communicated with the outlet conduit 202 of the directs high pressure fluids Fa that belongs to same system 200.

In the described in the text structural type; The fluid of being discussed comprises refrigerant gas G basically; This refrigerant gas is under the condition of high voltage it through compressor 1 at first, passes through follow-up refrigeration cycle step then, finally turns back to compressor itself via above-mentioned inlet pipe 201.

In addition, fluid comprises the auxiliary fluid L that mixes with above-mentioned refrigerant gas G, and this auxiliary fluid L is that the friction that reduces to constitute between the mechanical component of compressor 1 is necessary.

In the described in the text structural type and in most of the cases, auxiliary fluid L is an oil, but can not get rid of be: at fluid described in the various embodiment can be dissimilar.

As shown in Figure 2, with regard to the interior section of compressor 1, this compressor 1 comprises downstream that are arranged in above-mentioned inlet 3 and the compression set 5 that is communicated with this inlet 3.

As explained that said compression set 5 had the function that the low-pressure fluid Fb to inlet 53 places that are present in said compression set 5 compresses, so that be created in the condition of high voltage in outlet port.

In the structural type in the text, the compression set of describing 5 had screw type just now, and like what explained, the title of compressor comes from this.

Compression set 5 preferably but not necessarily include and be arranged on two parallel axis and two screw rods of engagement so that said fluid to be compressed is compressed, and makes said fluid advance in air conditioning or refrigeration system 200 inside.

In different structural forms, if implement screw compression device 5 according to known technology, then screw compression device 5 can comprise that single screw rod or screw compression device 5 can comprise the screw rod more than two.

As explained; Do not describe in other structural types that yet do not embody in the text; If compression set 5 belong to known technology and such as the whole compressor that constitutes of description ground have the performance and identical characteristic identical with current embodiment's compressor 1, then this compression set 5 can not have screw type.

In addition, the separation chamber 6 that has the downstream that are arranged in compression set 5 in the above-mentioned metal body 2.

Said separation chamber is used to separate refrigerant gas G and these two kinds of materials of auxiliary fluid L, and said two kinds of materials mix circuit fluid F in the system of being formed in 200.

As explained that above-mentioned compressor 1 was called as compact type, and this is due to the following facts: differently with the compressor of the other types of said separation chamber outside metal body 2, compressor 1 comprises separation chamber 6.

Particularly, separation is to obtain with the firm compressed fluid F of thrusting at a high speed through the inwall 61 facing to above-mentioned separation chamber 6.

Two kinds of materials are separated by this way, and auxiliary fluid L is to dirty as a result, and compressed gas G moves up.

Like Fig. 3 and shown in Figure 4, in the body 2 of above-mentioned compressor 1, also has the connecting pipe 7 between the outlet 54 of separation chamber 6 and compression set 5, so that guarantee passing through of high-pressure liquid Fa.

Illustrated like hereinafter, said pipeline 7 is to be used to realize very important element of the present invention.

At last, compressor 1 of the present invention comprises auxiliary line 8, and this auxiliary line 8 comprises one or more pipes 81, and said one or more pipes 81 make maybe said separation chamber 6 be placed in the ingress of compression set 5 and are communicated with zone 53.

Particularly, in the embodiment shown in Fig. 2, single tube 81 is arranged, what still can not get rid of is: in various embodiment, auxiliary line can comprise the pipe more than.

Under any circumstance, one or more pipe 81 have make auxiliary fluid L from the separation chamber 6 turn back to the entrance region 53 of compression set 5 function, in separation chamber 6, auxiliary fluid L separates with gas G.

This path of auxiliary fluid L is to become possible through the pressure difference between two zoness of different.

In fact, as described, separation chamber 6 is under the high pressure, and at inlet 53 places of compression set 5 the low pressure condition is arranged.

In the structural type of describing in the text and being embodied, auxiliary line 8 is provided with storage tank 82, and this storage tank 82 makes maybe be to storing in different activation of compressor 1 and the auxiliary fluid L that is present in during the un-activation stage in this compressor 1.

In different embodiments of the invention of not describing in the text or not embodying, according to design demand, storage tank 82 can be more than one.

In other structural type, auxiliary line 8 can not be provided with above-mentioned storage tank 82.

As shown in Figure 3, present embodiment also comprises the filtrating equipment 9 between separation chamber 6 and delivery outlet 5.

Said filtrating equipment 9 makes further " cleaning " compressed refrigerant gas G, any impurity that removal causes owing to the existence of very small amount of auxiliary fluid L.

In different structural forms, said filtrating equipment 9 can be provided, but this means on the purity of the above-mentioned refrigerant gas G of circuit in the pipe of the system of being placed on 200 and compromise to some extent.

According to the present invention; Compressor 1 is provided with to be embedded in compression set 5 is connected to the safety check 10 in the said connecting pipe 7 of separation chamber 6; So that prevent high-pressure liquid Fa court and the direction in the opposite direction that runs well fluidly turns back in the compression set 5, to regulate or refrigeration system 200 described in compressor be installed into line description during will do this in further detail and describe.

In addition, compressor 1 of the present invention is included in the solenoid valve 11 at the height place of the pipe 81 that belongs to above-mentioned auxiliary line 8 and connect compression set 5 and separation chamber 6.

Said solenoid valve 11 is closed and is used to prevent passing through of when compressor 1 does not turn round auxiliary fluid L.

Hereinafter to during comprising shown in Fig. 5 and Fig. 6 describing of being connected in parallel of the present invention, two valves 10 being introduced just now and 11 concrete function are explained in further detail more than the compression unit of one compressor 1 and to the adjusting that comprises the compression unit of introducing just now 100 among Fig. 7 or refrigeration system 200 (the two all requires the theme for this patent).

As shown in Figure 5, in the main embodiment that is embodied in the text, compression unit 100 can comprise two compressors 1 that are connected in parallel of the present invention.

Can not get rid of, in other constructional variant, compression unit 100 can comprise the compressor of the present invention 1 that is connected in parallel more than two.

Particularly, above-mentioned compression unit 100 is provided with inlet pipe 101, and this inlet pipe 101 is suitable for connecting the inlet 3 of each compressor 1 that is present in the compression unit.

In addition, compression unit 100 is provided with outlet conduit 102, and this outlet conduit 102 is suitable for connecting the delivery outlet 4 of above-mentioned compressor 1.Significantly; The two all is provided with

other opening

103 and 104 inlet pipe 101 and outlet conduit 102; Respectively; Opening 103 is used to make the low pressure refrigerant gas G from air conditioning or refrigeration system 200 to get into, opening 104 be used for from the compressed same gas delivery of above-mentioned compressor 1 to system itself.

At last, as shown in Figure 6, compression unit 100 comprises pipe 105, and this pipe 105 makes and can connect the storage tank 82 that belongs to each compressor 1 of said units 100 of the present invention.

According to described in the literary composition with the embodiment who is embodied, compression unit 100 is preferably but comprise that unnecessarily the downstream of each delivery outlet 4 that is connected to compressor 1 are so that increase the safety check 106 of the Security of whole system 200.

Particularly, as shown in Figure 6, each in the above-mentioned safety check 106 prevents that all high pressure refrigerant gas G from returning in the compressor 1, thereby causes the backward rotation of compression set 5 with respect to correct rotation direction, and therefore damages compression set 5.

In described in the text the preferred embodiments of the present invention; Compression unit 100 of the present invention also is provided with converter apparatus 107; As in the description of known technology, describing ground more in detail, this converter apparatus 107 is connected to a compressor in two compressors 1 of the present invention and has the function that the flow of the refrigerant gas G that flows out same equipment is adjusted and regulated.

In unshowned in the text other constructional variant, converter apparatus 107 can all be coupled with each compressor 1 that belongs to compression unit 100, so that more easily system is regulated.

Again according to other constructional variant, compression unit 100, each compressor 1 can not be provided with converter apparatus 107 specifically.In the additional embodiments of the present invention that does not embody in the text or do not describe, the compressor of the present invention 1 that constitutes compression unit 100 can be provided with the controlling device different with transducer 107.

Particularly, as described during the description to known technology, each single compressor 1 can be provided with guiding valve or bypath system.

As indicated above and as shown in Figure 7, the present invention also comprises air conditioning or refrigeration system 200, and this air conditioning or refrigeration system 200 comprise the compression unit 100 that its characteristic just all has been described.

As shown in Figure 7, said system 200 also comprises a plurality of pipes 203, and said a plurality of pipes 203 are sent refrigerant gas G in various sealing chambers to be cooled, and is connected to above-mentioned compression unit 100 through inlet pipe 201 and outlet conduit 202.

Particularly, in the described in the text structural type, system 200 comprises two heat exchangers 204 arranging along above-mentioned pipe 203.

As described, system 200 can be used as heat pump, and wherein first heat exchanger 204 is connected to one or more user U.

In addition, through second heat exchanger 204 is connected to one or more user U, same system can be used as refrigeration system.

In operation,, comprise refrigeration system 200 not rate running at full speed immediately after installation of compression unit 100 of the present invention as described, but little by little running.

Particularly, like what embodied among Fig. 7, this means that system 200 is activated at the beginning, have only 110 operations of a compressor, said compressor is by relevant converter apparatus 107 controls and adjusting, and second compressor 111 remains unactivated.

At this phase run, be present in above-mentioned solenoid valve 11 runnings in the compressor of shutoff so that prevent auxiliary fluid L from the separation chamber 6 lead to compression set 5 entrance region 53.

As stated; Said closure is necessary; This be because: two

compressors

110 and 111 have the storage tank separately 82 through above-mentioned pipe 105 connections; Therefore auxiliary fluid L can at first lead to out-of-operation compressor 111 from the compressor 110 that turns round, and leads to the upstream region 53 of compression set 5 subsequently from the storage tank 82 of out-of-operation compressor 111, causes said auxiliary fluid L just to assemble in this part.

Therefore, like what seen, the said excessive auxiliary fluid L on the height of compression set 5 can cause the grievous injury to compressor 111 in the incipient stage.

Closed said valve 11 prevents that auxiliary fluid L from flowing to another zone from a zone, has therefore increased the level of security of compressor 1, and thereby has reached one of the object of the invention.

In addition; All the time from the viewpoint of un-activation compressor 111; Be present in the safety check 10 that compression set 5 is connected in the connecting pipe 7 of separation chamber 6 and prevent that the compressed gas G that flows out operating compressor 110 from flowing back in this operating compressor 110, thereby avoided compression set 5 courts and direction that correctly rotation direction is opposite to rotate and protection compression set 5 is avoided any infringement.

Obviously, under described in the text situation,, doubled then to guarantee that gas G can not return towards the direction of mistake if compression unit 100 also is included in the safety check 106 in the downstream of delivery outlet 4.

Therefore, in this case, also realized the object of the invention.When refrigeration system 200 little by little reach its maximum rated power 50% the time, second compressor 111 also is activated, this second compressor 111 of the structural type described in the literary composition is not coupled with control change device 107, therefore starts with peak output immediately.

In different embodiments of the invention, as described, second compressor 111 is also regulated by transducer 107, and therefore, the efficiency of operation of this second compressor 111 can increase gradually, up to the rating value that reaches this second compressor 111.When said second compressor 111 was activated, the solenoid valve 11 that is provided with along the pipe of auxiliary line 8 81 was by deexcitation, for this reason, auxiliary fluid from the separation chamber 6 freely flow to compression set 5 inlet 53.

In this configuration, constitute two

compressors

110 and 111 concurrent workings of compression unit 100, do not cause the above-mentioned defective that belongs to known technology.

On the other hand; Consider that following situation is important: do not cause any defective because compare compressor 1 of the present invention with the compressor of known technology; So even can use this compressor 1 individually, and need other equipment of itself and same type be connected in parallel.

According to preceding text, clearly, realized the purpose of all settings as the compressor of theme of the present invention.

Particularly, the present invention has realized following purpose: developed a kind of positive displacement compressor, this positive displacement compressor need not introduced under the situation that outer member guarantees correct overall operation and can be connected in parallel with other compression devices of same type.

Thereby the present invention has also realized following purpose: implemented a kind of positive displacement compressor, the feasible extra cost that possibly reduce and/or avoid being used to implementing this positive displacement compressor is connected with other compressors of same type of this positive displacement compressor.

Another purpose that realizes by the present invention be propose more safer and more be not easy to injured positive displacement compressor than the compressor of known technology.

For this reason, the present invention has also realized following purpose: implemented a kind of positive displacement compressor, this positive displacement compressor portion within it prevents that partly auxiliary fluid and the compressed gas court direction opposite with correct rotation direction from returning.

At last; The present invention has also realized following purpose: implemented a kind of positive displacement compressor; The structure of this positive displacement compressor makes that when this compressor parallel was connected to other compression devices of same type, the height of the auxiliary fluid in this positive displacement compressor remained unchanged basically.

When implementing; Compressor, compression unit and refrigeration system as theme of the present invention can experience following variation: dropped within the scope of accompanying claims as long as change, although so this variation not shown in the text or description also still can be covered by patent of the present invention.

Under the situation of the subsidiary drawings attached mark of the technical characteristics shown in the claim; Add these reference character purposes and just be conveniently to understand claim itself, thereby said reference character has no restriction effect to only being given through by way of example by the degree of protection of each element that said reference character identified.

Claims

1. improved compressor (1) that comprises compressor body (2) formula, can identify in said compressor body (2):

-inlet (3), said inlet (3) is connected to the inlet pipe (101) of fluid to be compressed (F), and said fluid (F) to be compressed comprises the mixture of gas (G) and auxiliary fluid (L);

-compression set (5), said compression set (5) is positioned at the downstream of said inlet (3), is used to compress the said fluid (F) of outflow;

-separation chamber (6), said separation chamber (6) are positioned at the downstream of said compression set (5), are suitable for said compressed gas (G) is separated with said auxiliary fluid (L);

-connecting pipe (7), said connecting pipe (7) are suitable for downstream area (54) with said compression set (5) and are placed to said separation chamber (6) and are communicated with;

-auxiliary line (8); Said auxiliary line (8) comprises at least one pipe (81), and said at least one pipe (81) is connected said separation chamber (6) and between the upstream region (53) of said compression set (5) and be suitable for making said auxiliary fluid (L) to turn back in the said compression set (5);

-delivery outlet (4), said delivery outlet (4) are arranged in the downstream of said separation chamber (6) and are communicated with said separation chamber (6), and said delivery outlet (4) is connected with the output pipeline (102) of said compressed gas (G),

It is characterized in that; Said compressor (1) comprises being embedded in said compression set (5) is connected to the safety check (10) in the said connecting pipe (7) of said separation chamber (6), and is arranged in the solenoid valve (11) in the upstream region (53) that is connected to said compression set (5) in the said pipe (81) that belongs to said auxiliary line (8) and with said separation chamber (6).

2. compressor according to claim 1 (1) is characterized in that, said auxiliary line (8) comprises the storage tank (82) from the said auxiliary fluid (L) of said separation chamber (6).

3. according to each described compressor (1) in the aforementioned claim, it is characterized in that said compression set (5) is for having the compression set of a screw type.

4. according to each described compressor (1) in the claim 1 to 3, it is characterized in that said compression set (5) is for having the compression set of double-screw type.

5. according to each described compressor (1) in the claim 1 to 3, it is characterized in that said compression set (5) is for having the compression set more than two screw types.

6. according to each described compressor (1) in the aforementioned claim; It is characterized in that; Said compressor (1) comprises filtrating equipment (9); Said filtrating equipment (9) and is suitable for the capillary tube mode said gas (G) being separated with said auxiliary fluid (L) between said separation chamber (6) and said delivery outlet (4).

7. according to each described compressor (1) in the aforementioned claim, it is characterized in that said compressor (1) also comprises the guiding valve that is suitable for control and regulates the flow of the said fluid (F) that flows out said delivery outlet (4).

8. according to each described compressor (1) in the claim 1 to 6, it is characterized in that said compressor (1) also comprises the by-pass line that is suitable for control and regulates the flow of the said fluid (F) that flows out said delivery outlet (4).

9. according to each described compressor (1) in the claim 1 to 6, it is characterized in that said compressor (1) also comprises the converter apparatus (107) that is suitable for control and regulates the flow of the said fluid (F) that flows out said delivery outlet (4).

10. a compression unit (100) comprises two or more compressors (1) according to claim 1 of connection parallel with one another.

11. compression unit according to claim 10 (100); It is characterized in that said two or more compressors (1) are shared the outlet conduit (102) of the inlet pipe (101) of said inlet (3) that are used to be connected in parallel, said delivery outlet (4) that are used to be connected in parallel and are used to be connected in parallel a pipe (105) of said storage tank (81).

12. compression unit according to claim 11 (100) is characterized in that, the downstream of the delivery outlet (4) of each compressor in said compressor (1) connect safety check (106).

13. a refrigeration system (200) is characterized in that, said refrigeration system (200) comprises according to each compression unit of implementing (100) in the claim 7 to 10.