CN103528273A - Refrigerating cycle device - Google Patents
Refrigerating cycle device Download PDFInfo
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- CN103528273A CN103528273A CN201310082836.6A CN201310082836A CN103528273A CN 103528273 A CN103528273 A CN 103528273A CN 201310082836 A CN201310082836 A CN 201310082836A CN 103528273 A CN103528273 A CN 103528273A
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- compressor
- oil
- bypass circulation
- low tension
- refrigerating circulatory
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Abstract
The invention discloses a refrigerating cycle device which comprises motors, compression components, refrigerating machine oil and multiple compressors. The motors and the compression components are built in seal shells. The refrigerating machine oil is contained in the bottoms of the seal shells. The compressors are connected with the compression components and composed of air suction pipes. At least a condenser, an expansion device, an evaporator and a low-pressure loop form a refrigerating cycle, wherein the low-pressure loop is connected with the evaporator and the air suction pipes. One ends of bypass loops and the seal shells are connected to openings in the refrigerating machine oil, and the other ends of bypass loops are arranged in openings of the low-pressure loop. Differential pressure valves or electrically operated valves of the bypass loops are opened or closed. According to the embodiment of the refrigerating cycle device, oil mass reduction of the compressors in the operation can be avoided, and reliability is improved.
Description
Technical field
The fuel-flow control technology of the compressor that multi-connected air conditioner device, refrigerating plant that the present invention relates to carry several rotary compressors or screw compressor etc. is relevant, especially relates to a kind of refrigerating circulatory device.
Background technology
Carry in the multi-connected air conditioner device of number compressor, for control compressor oil mass, adopted the mode such as oil recovery apparatus such as configuration oil eliminators.In addition, when pipe arrangement length is installed, all to append refrigerator oil at every turn.
Have in several compressors of 1 cooling cycle system, the compressor stopping is possessed unwanted oil mass while restarting, so guarantor's oil mass of operating compressor sometimes insufficient, meeting produces fault.
Summary of the invention
The present invention is intended at least solve one of technical problem existing in prior art.For this reason, one object of the present invention is to propose a kind of refrigerating circulatory device of avoiding the oil mass reduction of operating compressor.
Refrigerating circulatory device according to the embodiment of the present invention, comprising: the several compressors that consist of the air intake duct that is built in motor in seal casinghousing and refrigerator oil in compression member, described seal casinghousing bottom, be connected with described compression member; The kind of refrigeration cycle at least being formed by condenser, expansion gear, evaporimeter and the low tension loop that is connected with described air intake duct with described evaporimeter; One end and described seal casinghousing are connected to described refrigerator oil split shed, the other end at the bypass circulation of described low tension loop split shed; The valve for pressure difference of bypass circulation or motor-driven valve described in switch.
According to the refrigerating circulatory device of the embodiment of the present invention, the compressor stopping will reducing guarantor's oil mass, operating compressor can increase guarantor's oil mass on the other hand.When the pipe arrangement total length of cooling cycle system is elongated, also have the drop of indoor set and off-premises station to become in large condition, operating compressor can maintain necessary guarantor's oil mass, avoids the oil mass of operating compressor to reduce, and improves reliability.
In addition, according to refrigerating circulatory device of the present invention, also there is following additional technical feature:
In some embodiments of the invention, the air intake duct of at least 2 described compressors is connected with 1 reservoir possessing in described low tension loop, and the other end of the bypass circulation possessing in described compressor connects described low tension loop or described reservoir.
According to some embodiments of the present invention, at least described compression member, in the described compressor of discharge capacity maximum, configured described bypass circulation.
In some embodiments of the invention, between described compressor and described condenser, configured oil eliminator.
Alternatively, described compressor is rotary compressor or scroll compressor.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination obviously and is easily understood becoming the description of embodiment, wherein:
Fig. 1 is refrigerating circulatory device figure relevant to the embodiment of the present invention 1, that carry several rotary compressor R;
Fig. 2 is the detail of sectional view relevant, compressor in service to this embodiment 1 and valve for pressure difference;
Fig. 3 is the sectional view of compressor and the detail of valve for pressure difference relevant to this embodiment 1, after stopping;
Fig. 4 is the embodiment of the present invention 2 sectional view relevant, operating compressor;
Fig. 5 is sectional view relevant to this embodiment 2, compressor after stopping;
Fig. 6 is refrigerating circulatory device figure relevant to the embodiment of the present invention 3, that carry several rotary compressor R;
Fig. 7 is relevant to the embodiment of the present invention 3, reservoir pipe arrangement sectional view.
The specific embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance.
In description of the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand above-mentioned term concrete meaning in the present invention.In addition,, in description of the invention, except as otherwise noted, the implication of " a plurality of " is two or more.
Below with reference to Fig. 1-Fig. 7, describe according to a kind of refrigerating circulatory device of the embodiment of the present invention.
One end of the bypass circulation B that 3 compressors possess in each to the refrigerator oil opening of seal casinghousing 2, the other end to low tension loop U opening.After compressor R3 shuts down, housing pressure declines, and valve for pressure difference G built-in in bypass circulation B is because the differential pressure of high pressure and low pressure is opened, so the oil of seal casinghousing can flow out in low tension loop U.Therefore the compressor, stopping will reducing guarantor's oil mass, operating compressor can increase guarantor's oil mass on the other hand.After the compressor stopping is restarted, housing pressure can increase, and valve for pressure difference G can close, and just can make oil mass recover.In addition, in the time of guarantor's oil mass surplus of operating compressor, from blast pipe 3, tell oil and guarantee in oil eliminator S.
The compressor stopping will reducing guarantor's oil mass, operating compressor can increase guarantor's oil mass on the other hand.When the pipe arrangement total length of cooling cycle system is elongated, also have the drop of indoor set and off-premises station to become in large condition, operating compressor can maintain necessary guarantor's oil mass.
Embodiment 1:
Refrigerating circulatory device shown in Fig. 1, by 3 rotary compressor R1, R2 and R3, be connected to oil eliminator S, condenser C, expansion gear V, evaporimeter E on the loop, interflow of blast pipe 3 separately form, through being connected to evaporimeter E outlet low-voltage tube, be shunted in the reservoir A possessing in compressor separately.And then, reservoir A connected the air intake duct 4 of compressor.At this, loop from evaporimeter E to air intake duct 4 is called low tension loop U.And, possess check valve D in the blast pipe 3 of each compressor.In addition, oil return circuit is connected to low tension loop U from the bottom of oil eliminator S through two-way valve T.
Announcement technology of the present invention for convenience of description, in 3 compressor R1, R2, R3, to make the variable refrigerating capacity of the compressor R1 of variable-frequency motor bodyguard sample be that compressor R2 and the R3 of 0.3～3HP, constant speed is respectively 3.5HP.Therefore the refrigerating circulatory device that, carries these compressors is between 0.2～10HP, substantially can carry out continuous transfiguration.In addition, in Fig. 1, make each compressor R1, R2, R3 in service.
Fig. 2 represents the detail drawing of valve for pressure difference G built-in in the sectional view of operating compressor R and bypass circulation B.Each compressor is possessed appropriate refrigerator oil 6 in the bottom of seal casinghousing 2 separately.One end of the bypass circulation B possessing in each compressor connects 2 couples of refrigerator oil 6(of seal casinghousing and calls oil or oil 6 in the following text) oil in perforate, the other end connect low tension loop U perforate.In the present embodiment, near near the flange of the aperture position upper end of the cylinder 20 that the pasta in each compressor operating possesses when stable operation in compression member P, in the oil of bypass circulation B in supplementary bearing 25.
Built-in valve for pressure difference G in Fig. 2 bypass circulation B, as shown in Figures 2 and 3, in the internal diameter of guiding valve 51, coil spring 54, pipe, be pressed into fixing conical valve seat 52, determine that the stop 53 of guiding valve 51 actuating ranges forms.As mentioned above, the structure of the valve for pressure difference G of the present embodiment, be similar to common check valve.
The pressure of operating seal casinghousing 2 is that the pressure of high pressure (Pd), low tension loop U is low pressure (Ps).Therefore, in bypass circulation B, oily open side is high pressure (Pd), to the open side of low tension loop U, is low pressure (Ps) so after guiding valve 51 is located on conical valve seat 52 in Fig. 2, can prevent that oil 6 from flowing out in low tension loop U.
Fig. 3 represents that operation stops pasta (oil mass) variation of rear compressor R3 and the action of valve for pressure difference G.In addition, at this moment compressor R1 and R2 carry out in operation.Compressor R3 shuts down; the words of the pressure drop of seal casinghousing 2; between seal casinghousing 2 and low tension loop U; pressure reduction (Δ p) becomes lower than predetermined constant (k); the thrust of the guiding valve 51 bringing for the words of Δ p < k, due to pressure reduction, the power of coil spring 54 is won victory, guiding valve 51 is deviate from from conical valve seat 52.At this moment, the oil 6 of seal casinghousing 2 flows out rapidly towards low tension loop U.
Thereafter, the aperture position of pasta and bypass circulation B consistent after, stop flowing out, compressor R3 maintains predefined pasta and oil mass.That is required pasta and oil mass while, restarting for the compressor R3 after guaranteeing to stop, having determined accordingly the aperture position of bypass circulation B.In Fig. 3, oil 6 stops flowing out, the pressure of seal casinghousing 2 and the pressure of low tension loop U is all low pressure (Ps), reaches balance, so Δ p=0.
The oil mass (Fig. 2) of the compressor R3 of operation before stopping and stop after the difference of oil mass (Fig. 3) flow out to the oil mass in low tension loop U, all oil runs are diverted in the reservoir A of compressor R1 in service, R2, be captured in this container.The oilhole 13 that captive oil possesses from the central tube 12 of reservoir A flow in seal casinghousing 2 by the compression member P of air intake duct 4, process compressor R1 and R2.Therefore, the oil mass of compressor R1 and R2 and pasta can increase.
If the oil mass that compressor increases is superfluous, compressor can be discharged superfluous oil from blast pipe 3, and by oil eliminator, S guarantees.Words, two-way valve T that the oil mass of oil eliminator S is increased to more than certain value open, and oil flows in low tension loop U.Therefore, the oil of oil eliminator S can not travel back across in condenser C, expansion gear V and evaporimeter E, but repeats to get back to the circulation in the reservoir A of operating compressor R1 and R2.Therefore, can guarantee that operating each compressor obtains sufficient oil mass.
Like this, be characterized in that the pasta of rotary compressor is too high, from blast pipe 3 telling oil mass and can increase out, the oil mass of maintenance is adjusted automatically, but pasta is too low, can not recover as early as possible pasta, so because lack of lubrication can cause fault.But the feature of the present embodiment is: utilize the compressor in stopping oil, operating compressor is carried out to sufficient fuel feeding.
Next, after the compressor R3 that stops starts again, in the short period, valve for pressure difference G stays open, but the pressure of seal casinghousing 2 can increase Δ p≤k, at this moment starts common compression, check valve D opens.The time that valve for pressure difference G opens, by the value of constant (k), low pressure refrigerant resistance, the refrigerant resistance of bypass circulation B, the aperture of conical valve seat 52 from reservoir A to compression member P, the power etc. that compresses the coil spring 54 of guiding valve 51, decided.
If being set as 10 seconds, this time to the time between Δ p≤k after compressor R3 restarts is that discharge time (load alleviates), compressor R3 can sharply not increase compression load, guarantor's oil mass of compressor R3 or the increase and decrease of pasta are also little in addition.In addition, about the design of constant (k), to consider that above-mentioned characteristic is preferentially optimized.Such as, even k resembles 0.01Mpa littlely in air-conditioner, after compressor stops, it is possible at short notice that the oil 6 from seal casinghousing 2 to low tension loop U flows out.In addition, much less, according to the kind of the kind of application apparatus, use refrigerant, the optimum value of k can change.
Compressor R1 and R2 when next compressor R2 stops only having compressor R1 in continuous service in continuous service, effect of the present invention in above-described embodiment, only have compressor R3 to stop, even if also can not change.In addition, while stopping order for the capability control of refrigerating circulatory device, the operation that predetermines compressor, such as pressing
sequence starting, press compressor
reverse order stop in the control mode of compressor, the in service common compressor R1 of device operation, so compressor R1 can omit bypass circulation B.
In addition, the frequency that stops of compressor R3 is maximum, only has compressor R3 to be equipped with bypass circulation B, compressor R2 and compressor R1 can omit bypass circulation B.In addition, in 3 compressors, compressor R3 is maximum capacity machine or maximum pump discharge machine, guarantor's oil mass of compressor R3 at most, also should be many on the degree of impact of other compressor, so compressor R2 and R1 can omit bypass circulation B.Like this, consider that the running frequency of each compressor and maximum pump discharge can option and installment bypass circulation B.
Embodiment 2:
The oil mass (pasta) of (Δ P=0) when Fig. 5 is stable after stopping.Compressor R3 stops rear motor-driven valve N standard-sized sheet, and Δ p > 0, so a part for the oil 6 of seal casinghousing 2 flows out in low tension loop U by bypass circulation B.Thereafter, such as motor-driven valve N full cut-off after 10 seconds.Even on the other hand, compressor R3 while restarting motor-driven valve N in full-shut position, start, or before starting after standard-sized sheet, also passable by the time full cut-off of reserving in advance.
Like this, without valve for pressure difference G, use motor-driven valve N, oily traveling time that can arbitrary decision low tension loop U and the compression time started while restarting.And, press described in embodiment 1, according to necessity, can be from compressor R1 or compressor R1, R2 two sides' cancellation bypass circulation B.
Embodiment 3:
In embodiment 3 shown in Fig. 6,1 reservoir A shown in the total Fig. 7 of 3 compressor R1, R2 and R3 forms refrigerating circulatory device.Compressor R2 and R3 have bypass circulation B, compressor R1 and omit bypass circulation B.The two ends that each bypass circulation B has motor-driven valve N, a bypass circulation B have connected the air intake duct 4 of seal casinghousing 2 and compressor.
In reservoir A, the dividing plate 11 of bottom configuration is divided into two parts by container, formed bottom chamber 10.Bottom chamber 10 has connected the air intake duct 4 of each compressor.Therefore, each compressor is shared reservoir A.Arbitrary compressor stops, motor-driven valve N opening, and the oil 6 of seal casinghousing 2 can flow in bottom chamber 10.Therefore, operating each compressor can utilize the oil flowing out in bottom chamber 10.And, operating compressor has one to stop, in service only have one can utilize the sufficient oil of staying in bottom chamber 10.In addition, as the present embodiment, the total reservoir of number compressor, so operating compressor will use jumbo reservoir advantage, be that the reliability of compressor can further improve.
Even in the present embodiment, compressor R1 is conventionally in the control mode of operation, compressor R1 does not need bypass circulation B.In addition, only have compressor R1 without reservoir A, only have so compressor R2 and R3 to have reservoir A.In addition, the port of export of bypass circulation B connects the bottom chamber 10 of reservoir A, identical effect in the time of can obtaining connecting with air intake duct 4.
The rotary compressor that is high pressure in above-described embodiment 1 to 3, based on seal casinghousing 2 internal pressures discloses, but in the scroll compressor that it is high pressure that content of the present invention can certainly adopt at housing.
Wherein, can judge the present invention in using the multiple refrigerating circulatory device of multiple compressors, high to the contribution degree of refrigerant enclosed volume and the larger aircondition of service condition change.
In the description of this description, the description of reference term " embodiment ", " some embodiment ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited by claim and equivalent thereof.
Claims (5)
1. a refrigerating circulatory device, is characterized in that, comprising:
The several compressors that formed by the air intake duct that is built in motor in seal casinghousing and refrigerator oil in compression member, described seal casinghousing bottom, be connected with described compression member;
The kind of refrigeration cycle at least being formed by condenser, expansion gear, evaporimeter and the low tension loop that is connected with described air intake duct with described evaporimeter;
One end and described seal casinghousing are connected to described refrigerator oil split shed, the other end at the bypass circulation of described low tension loop split shed;
The valve for pressure difference of bypass circulation or motor-driven valve described in switch.
2. refrigerating circulatory device according to claim 1, it is characterized in that, the air intake duct of at least 2 described compressors is connected with 1 reservoir possessing in described low tension loop, and the other end of the bypass circulation possessing in described compressor connects described low tension loop or described reservoir.
3. refrigerating circulatory device according to claim 1, is characterized in that, at least described compression member, in the described compressor of discharge capacity maximum, has configured described bypass circulation.
4. refrigerating circulatory device according to claim 1, is characterized in that, between described compressor and described condenser, has configured oil eliminator.
5. according to the refrigerating circulatory device described in any one in claim 1-4, it is characterized in that, described compressor is rotary compressor or scroll compressor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310082836.6A CN103528273A (en) | 2013-03-14 | 2013-03-14 | Refrigerating cycle device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310082836.6A CN103528273A (en) | 2013-03-14 | 2013-03-14 | Refrigerating cycle device |
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| CN103528273A true CN103528273A (en) | 2014-01-22 |
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| CN201310082836.6A Pending CN103528273A (en) | 2013-03-14 | 2013-03-14 | Refrigerating cycle device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10232056A (en) * | 1997-02-20 | 1998-09-02 | Hitachi Ltd | Air-conditioning device |
| US20040231357A1 (en) * | 2002-06-11 | 2004-11-25 | Hiromune Matsuoka | Oil equalizing circuit compression mechanisms, heat source unit for freezing device, and freezing device having the same |
| EP1510693A2 (en) * | 2003-08-29 | 2005-03-02 | Samsung Electronics Co., Ltd. | Oil level equalizing system for multiple compressors |
| CN1637360A (en) * | 2003-12-25 | 2005-07-13 | 三星电子株式会社 | Oil equalizing method for multi-compressor |
| US20100206000A1 (en) * | 2009-02-16 | 2010-08-19 | Ho Jong Jeong | Air conditioner and method of controlling the same |
-
2013
- 2013-03-14 CN CN201310082836.6A patent/CN103528273A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10232056A (en) * | 1997-02-20 | 1998-09-02 | Hitachi Ltd | Air-conditioning device |
| US20040231357A1 (en) * | 2002-06-11 | 2004-11-25 | Hiromune Matsuoka | Oil equalizing circuit compression mechanisms, heat source unit for freezing device, and freezing device having the same |
| EP1510693A2 (en) * | 2003-08-29 | 2005-03-02 | Samsung Electronics Co., Ltd. | Oil level equalizing system for multiple compressors |
| CN1637360A (en) * | 2003-12-25 | 2005-07-13 | 三星电子株式会社 | Oil equalizing method for multi-compressor |
| US20100206000A1 (en) * | 2009-02-16 | 2010-08-19 | Ho Jong Jeong | Air conditioner and method of controlling the same |
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Application publication date: 20140122 |