CN1766332A - Linear compressor - Google Patents
Linear compressor Download PDFInfo
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- CN1766332A CN1766332A CN 200410072487 CN200410072487A CN1766332A CN 1766332 A CN1766332 A CN 1766332A CN 200410072487 CN200410072487 CN 200410072487 CN 200410072487 A CN200410072487 A CN 200410072487A CN 1766332 A CN1766332 A CN 1766332A
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Abstract
The invention a linear compressor of adjustable induction coefficient according to the variation of load, which is characterized by the following: the fixation part contains compression space; the mobile part is fixed in the fixation part to do reciprocal line movement along the axial direction, which compresses the sucked coolant in the compression space; at least one spring supports the mobile part, which changes the spring coefficient according to the load; the linear motor connects and activates the mobile part, which changes the operation frequency fc according to the adjusted induction coefficient.
Description
Technical field
The present invention relates to a kind of Linearkompressor (LINEAR COPMRESSOR); Be particularly related to a kind of adjusting induction coefficient, make the Linearkompressor of operation frequency according to load variations
Background technique
Generally speaking, compressor (Compressor) is obtain power from motor or turbine Power Generation Units such as (turbine) after, pressurized air or refrigerant or other multiple working gass, thereby the device of the pressure of raising above-mentioned gas.Here, above-mentioned compressor is used comparatively general in general household electric appliance or manufacture field such as air-conditioning and refrigerator.
Compressor can be divided into: the compression volume that forms suction/discharge working gas between piston (Piston) and cylinder (Cylinder), by making piston carry out the straight line back and forth movement in cylinder interior, the reciprocal compressor of compression refrigerant (reciprocating compressor); Between the wheel (Roller) of off-centre rotation and cylinder (Cylinder), form the compression volume of suctions/discharge working gas, rotate the rotary compressor of compression refrigerant (rotary compressor) along cylinder inner wall off-centre by making wheel; Between turn scrollwork (orbiting scroll) and fixed scroll (Fixed scroll), form the compression volume of suction/discharge working gas, by the turn scrollwork is rotated along fixed scroll, the scroll compressor of compression refrigerant (Scroll compressor).
Recently, on the basis of in the past reciprocal compressor, developed a lot by piston is directly connected on the drive motor that carries out the straight line back and forth movement, avoided because the mechanicalness loss that the operation conversion brings, thereby not only can improve compression efficiency, also make its structure more simple Linearkompressor that becomes.
In general, Linearkompressor is that the linear drives power of utilizing motor sucks, compresses, discharges refrigerant, and it can be made of following components substantially: the cylinder of compression refrigerant and the press part of piston; Supply with the drive portion of the linear electric machine of driving force to above-mentioned press part.
Specifically, above-mentioned Linearkompressor, its structure and working principle are described below: the seal container internal fixation is provided with cylinder.Be provided with piston in above-mentioned cylinder interior, this piston can be done the straight line back and forth movement.And along with above-mentioned piston is done the straight line back and forth movement in above-mentioned cylinder interior, refrigerant will flow into the compression volume of above-mentioned cylinder interior, then refrigerant be compressed the back and discharge.In addition, be provided with inhaling valve group and discharge valve group in the above-mentioned compression volume.Here, above-mentioned valve sets is regulated the inflow and the discharge of refrigerant according to above-mentioned compression volume pressure inside.
In addition, interconnect the linear electric machine that is provided with generation power on the above-mentioned piston.Here, the concrete structure of above-mentioned linear electric machine is described below: the setting that keeps at a certain distance away of inner stator and external stator.Here, at above-mentioned cylinder periphery, a plurality of laminations (lamination) are to the circumferencial direction lamination, thereby constitute above-mentioned inner stator and external stator.Above-mentioned inner stator or external stator inboard are wound with coil (coil), and are provided with permanet magnet in the slit between above-mentioned inner stator and the external stator, and this permanet magnet is connected with above-mentioned piston.
Above-mentioned permanet magnet is set to the state that can move to the moving direction of above-mentioned piston.At this moment, in case there is electric current to flow in the above-mentioned coil, because the effect of the electromagnetic force that is produced this moment, above-mentioned permanet magnet will carry out the straight line back and forth movement to the moving direction of above-mentioned piston.Generally speaking, above-mentioned linear electric machine will be with certain operation frequency f
cOperation, above-mentioned piston then carries out the straight line back and forth movement with certain stroke S.
In addition, because the driving of above-mentioned linear electric machine, above-mentioned piston is when carrying out the straight line back and forth movement, in order to be provided with various springs (spring) to the above-mentioned piston of moving direction elastic support.More detailed says, as a kind of disc spring (coil-spring) of mechanical type spring, to the moving direction of above-mentioned piston, by above-mentioned seal container and cylinder institute elastic support.And, flow into the refrigerant of above-mentioned compression volume, equally also play a role as gas spring (gas-spring).
At this moment, above-mentioned disc spring will have certain mechanical type spring constant K
m, above-mentioned gas spring will have the gas spring COEFFICIENT K that changes according to load
gConsider above-mentioned mechanical type spring constant K here,
mAnd gas spring COEFFICIENT K
g, will calculate the natural frequency f of piston Linearkompressor according to following mathematical expression 1
n
The natural frequency f of the piston that calculates as mentioned above,
nOperation frequency f with the above-mentioned linear electric machine of decision
cAbove-mentioned Linearkompressor makes operation frequency f
cNatural frequency f with above-mentioned piston
nConsistent, therefore can under above-mentioned resonance state, move, thereby raise the efficiency.
Therefore, in the Linearkompressor of structure as mentioned above, in case electric current supply is in above-mentioned linear electric machine, along with electric current flow in the above-mentioned coil, because the interaction of above-mentioned external stator and inner stator will produce electromagnetic force.Above-mentioned permanet magnet will carry out the straight line back and forth movement owing to this electromagnetic force with the piston that is connected therewith.
At this moment, above-mentioned linear electric machine will be with certain operation frequency f
cOperation.And because the operation frequency f of above-mentioned linear electric machine
nNatural frequency f with above-mentioned piston
nConsistent, therefore can under resonance state, move, thereby make the efficient maximization.
As mentioned above, along with above-mentioned piston carries out the straight line back and forth movement in above-mentioned cylinder interior, above-mentioned compression volume pressure inside will change.Because the variation in pressure of aforesaid above-mentioned compression volume after refrigerant will be inhaled into above-mentioned compression volume, is compressed the back and discharges.
In the compressor of structure, have only linear electric machine under the load in the design of being considered as mentioned above, with unanimity in the mechanical type spring constant K by above-mentioned disc spring
mAnd the gas spring COEFFICIENT K of gas spring
gCalculate the natural frequency f of piston
nOperation frequency f
cOperation.Therefore, have only the load area of considering in design, above-mentioned linear electric machine just can move in resonance state, improves compression efficiency.
But, because the actual load of aforesaid Linearkompressor is variable, so the gas spring COEFFICIENT K of above-mentioned gas spring
gReach natural frequency f with this piston that calculates
nAlso will change.
Specifically, above-mentioned linear electric machine as shown in Figure 1a, at the shoulder load zone decision operation frequency f in when design
c, make the natural frequency f of itself and above-mentioned piston
nConsistent.And, even changing load, also certain operation frequency f to determine
cOperation, therefore the natural frequency f of above-mentioned piston
nTo become big greatly along with the change of load.
[mathematical expression 1]
At this moment, above-mentioned f
nBe the natural frequency of piston, K
mAnd K
gBe mechanical spring coefficient and gas spring coefficient, M is the quality of piston.
In general, because in the Monolithic spring COEFFICIENT K that designed at that time
TIn, the gas spring COEFFICIENT K
gShared ratio is less, does not therefore generally consider the gas spring COEFFICIENT K
g, perhaps with the gas spring COEFFICIENT K
gBeing set at certain value is suitable for.And because the mass M and the mechanical spring COEFFICIENT K of above-mentioned piston
mHas certain value too, therefore the natural frequency f of above-mentioned piston
nEqually also be calculated as certain value by above-mentioned mathematical expression 1.
But in fact load increases, and will raise in the pressure and the temperature of the refrigerant in limited space, so the elastic force of above-mentioned gas spring self will become greatly, thereby make the gas spring COEFFICIENT K
gBecome big.With above-mentioned gas spring COEFFICIENT K
gThe natural frequency f of the piston of calculating for the basis
nCan become big too.
Fig. 2 is the pie graph that demonstrates according to the power supply circuit of the Linearkompressor of conventional art.The power supply circuit of above-mentioned Linearkompressor comprises following components and constitutes: the coil L with certain induction coefficient; Capacitor C with certain electric conductivity.As shown in the figure, from voltage or the electric current that power supply provides, will have operation frequency f according to the resonance of the LC in the power supply circuit
cShown in Fig. 1 a and Fig. 1 b, in order to make such operation frequency f
cNatural frequency f with the shoulder load zone
nUnanimity will be set by selecting suitable L and C.Therefore, shown in Fig. 1 a and Fig. 1 b, because in the shoulder load zone, the operation frequency f of above-mentioned linear electric machine
cNatural frequency f with above-mentioned piston
nTherefore consistent, above-mentioned piston can move to similitude, and the stable compression of finishing.In addition, owing under resonance state, realize operation, can make the maximizing efficiency of compressor.
But, in low-load region, the natural frequency f of above-mentioned piston
nWill be less than the operation frequency f of above-mentioned linear electric machine
c, therefore above-mentioned piston will excessively move to the above position of similitude, therefore not only have excessive compression force, and the friction and the wear phenomenon of above-mentioned piston and cylinder also can take place, and owing under resonance state, do not move, thereby compressor efficiency is reduced.
Equally, at high-load region, because the natural frequency f of above-mentioned piston
nWill be greater than the operation frequency f of above-mentioned linear electric machine
c, therefore above-mentioned piston can't move to similitude, thereby causes compressive force to reduce.And owing to can not under resonance state, move, thereby can reduce compressor efficiency.
Therefore, in the Linearkompressor in the past, because the variation of load makes the natural frequency f of piston
nChange, because the operation frequency f of linear electric machine
cTherefore be certain, above-mentioned linear electric machine can't move under resonance state, thereby causes its efficient to reduce, and in addition, because can not be to the ground control of load dynamic role, thereby causes laying down rapidly the problem of load.
Summary of the invention
The present invention proposes in order to solve the above problems.Therefore, the purpose of this invention is to provide: even the natural frequency f of piston
nRely on load variations, also can be by the operation frequency f of linear adjustment motor
c, make its corresponding load, thus the Linearkompressor that effectively compresses.
To achieve these goals, Linearkompressor according to the present invention comprises following components and constitutes: inside is formed with the fixed component of compression volume; In the inboard of said fixing member, by axial straight line back and forth movement, compression is drawn into the movable link of the refrigerant of compression volume; To the above-mentioned movable link of moving direction elastic support of above-mentioned movable link, and at least more than one the spring that makes that spring constant changes according to load; Be connected with above-mentioned movable link, drive above-mentioned movable link, make it carry out the straight line back and forth movement, and, make its operation frequency f by regulating induction coefficient
cThe linear electric machine that changes.
In addition, in freezing/idle call system that above-mentioned Linearkompressor is arranged at, above-mentioned load preferably by above-mentioned freezing/the idle call system in condensing refrigerant pressure (condensing pressure) and in above-mentioned rapid steamer the difference between the pressure (evaporation press) of evaporation refrigerant be that ratio is calculated.
In addition, above-mentioned load is that ratio is calculated with the middle pressure (mean pressure) that above-mentioned condensing pressure and evaporation are pressed preferably.
In addition, above-mentioned linear electric machine preferably makes above-mentioned operation frequency f
cWith the resonant frequency f that with the load is the above-mentioned movable link of ratio variation
nSynchronizing.
In addition, above-mentioned linear electric machine preferably can make above-mentioned movable link straight line back and forth movement to similitude.
In addition, above-mentioned linear electric machine comprises: the inner stator that a plurality of laminations are constituted to the circumferencial direction lamination; In the outside of above-mentioned inner stator, the setting that keeps at a certain distance away, and the external stator that a plurality of laminations are constituted to the circumferencial direction lamination; Gap between above-mentioned inner stator and external stator, for electromagnetic force takes place, and the coil of winding around twines body; Gap between above-mentioned inner stator and external stator is connected setting with above-mentioned movable link, and twines the electromagnetic force of body and the permanet magnet that the straight line back and forth movement is carried out in interaction according to above-mentioned coil.Wherein, above-mentioned coil winding body is to be made of the plural coil winding layer to the circumferencial direction lamination.Above-mentioned linear electric machine is made of following components: select at least more than one coil winding layer, the branch unit of input current is provided; Twine the body series capacitors with above-mentioned coil; According to above-mentioned load, control above-mentioned branch unit, make the variable control gear of whole induction coefficient.
In addition, above-mentioned coil winding layer preferably has mutually different induction coefficient.
In addition, the writhing number of coil is preferably mutually different in the above-mentioned coil winding layer.
In addition, above-mentioned coil winding layer preferably has mutually different coil thickness.
In addition, above-mentioned control gear is answered the above-mentioned branch unit of following control: select little induction coefficient during high load; Select big induction coefficient during low-load.
In addition, above-mentioned coil winding layer preferably is separated from each other setting.
In addition, in the common common terminal that connects of an end of each coil winding layer be connected in separately in plural indivedual terminals of the other end of above-mentioned coil winding layer, above-mentioned branch unit is at least more than one the above-mentioned electric current of indivedual terminal feedings preferably.
In addition, above-mentioned coil winding layer is preferably interconnective.
In addition, above-mentioned branch unit preferably twines in the two ends fulcrum and the connection fulcrum between each coil winding layer of body at above-mentioned coil, selects two fulcrums to supply with above-mentioned electric current.
In addition, Linearkompressor control gear according to the present invention is to comprise following components to constitute: towards the circumferencial direction of Linearkompressor, constitute coil by plural coil winding layer and twine body; Select at least more than one coil winding layer that the branch unit of input current is provided; Twine the body series capacitors with above-mentioned coil; According to the above-mentioned branch unit of load control, regulate induction coefficient, make operation frequency (f
c) variable control gear.
In addition, twine body towards the circumferencial direction lamination according to the coil of Linearkompressor of the present invention, and be to constitute by plural coil winding layer with mutually different induction coefficient.
Linearkompressor according to the present invention has following effect: among the present invention, infer out according to the gas spring coefficient of load variations and the variation of natural frequency by certain frequency program of inferring, and make the operation frequency synchronizing of linear electric machine according to the natural frequency of inferring out, thereby the operation under the realization resonance state finally makes the compression efficiency maximization.
Description of drawings
Fig. 1 a and Fig. 1 b are that demonstration is according to the load of the Linearkompressor of conventional art and the chart of stroke (stroke) curve and load and efficiency curve.
Fig. 2 is the pie graph that demonstrates according to the power supply circuit of the Linearkompressor of conventional art.
Fig. 3 is the sectional drawing that demonstrates according to Linearkompressor of the present invention.
Fig. 4 a and Fig. 4 b show according to the load of Linearkompressor of the present invention and the figure of stroke curve and load and efficiency curve.
Fig. 5 demonstrates in Linearkompressor according to the present invention, press to measure condensing temperature and evaporating temperature according to condensing pressure and evaporation, poor with between above-mentioned condensing temperature and the evaporating temperature again, and mean temperature calculates the figure of load.
Fig. 6 is the sectional drawing that demonstrates according to coil of the present invention.
Fig. 7 a and Fig. 7 b are the pie graphs that demonstrates the 1st and the 2nd embodiment of the Linearkompressor control gear that is made of coil.
The critical piece description of reference numerals
2: seal container 4: cylinder
6: piston 7: silencing apparatus
8a, 8b: spring 10: linear electric machine
12: inner stator 14: external stator
16: permanet magnet 15,15 ': branch unit
18: control gear 22: inhaling valve
24: the discharge valve group
Embodiment
Below, will be based on according to embodiments of the invention and accompanying drawing, the linear electric motor of moving-magnetic type (movingmagnet) is described after, the piston of Lian Jieing sucks, compression, discharges the Linearkompressor of refrigerant in cylinder interior straight line back and forth movement therewith.But right of the present invention is not confined to aforesaid embodiment, but is defined by the record in claims.Under the situation that does not exceed the technology of the present invention scope of putting down in writing in claims, the operator of relevant industries can carry out various deformation and modification to it.
According to Linearkompressor of the present invention as shown in Figure 3: a side of seal container 2 is provided with intake channel 2a and the outlet pipe 2b that makes refrigerant inflow/outflow; Cylinder 4 is fixedly set in the inboard of above-mentioned seal container 2; In order to compress the refrigerant of the compression volume P that is drawn into above-mentioned cylinder 4 inside, and be provided with piston 6 in above-mentioned cylinder 4 inside, here, above-mentioned piston 6 can be done the straight line back and forth movement; Refrigerant in the above-mentioned compression volume P also plays a role as the gas spring that has according to certain gas spring coefficient k g of load variations, meanwhile, towards the moving direction of above-mentioned piston 6, obtains having mutually different spring constant K
M1, K
M2The 1st, 2 mechanical type spring 8a, the elastic support of 8b; Above-mentioned piston 6 is connected setting with the linear electric machine 10 that produces the round driving force of straight line.Above-mentioned linear electric machine 10 also can be inferred out the natural frequency f of above-mentioned piston according to certain frequency program of inferring
n, and control operation frequency f with this
cSynchronizing.
In addition, an end of the above-mentioned piston 6 adjacent with above-mentioned compression volume P is provided with inhaling valve 22.And an end of the above-mentioned cylinder 4 adjacent with above-mentioned compression volume P is provided with discharge valve group 24.Here, above-mentioned inhaling valve 22 and discharge valve group 24 according to above-mentioned compression volume P pressure inside, are regulated open/close state separately automatically.
Here, above-mentioned seal container 2 is inner airtight in order to make, the upper and lower part cover Shell setting that mutually combines.And a side of above-mentioned seal container 2 is provided with the intake channel 2a that flows into refrigerant and discharges the pipe 2b that refrigerant flows out.In above-mentioned cylinder 4 inboards, to the moving direction elastic support be provided with piston 6, above-mentioned piston 6 can carry out the straight line back and forth movement.Meanwhile, in above-mentioned cylinder 4 outsides, above-mentioned linear electric machine 10 constitutes assembly body in the assembling back mutually by framework (frame) 18.Here, above-mentioned assembly body relies on supported spring 29, and elastic support is in the inside bottom surface of above-mentioned seal container 2.
In addition, a certain amount of oil has been deposited in the bottom surface of above-mentioned seal container 2 inside.The lower end of above-mentioned assembly body is provided with the fluid supply apparatus 30 of suction (pumping) oil.Meanwhile, above-mentioned assembly body underside frame 18 inside are formed with and are used for oil is supplied to oily supplying pipe 18a between above-mentioned piston 6 and the cylinder 4.The vibration suction oil that produces when therefore, above-mentioned fluid supply apparatus 30 utilizes above-mentioned piston 6 to carry out the straight line back and forth movement.Then, above-mentioned oil will supply to gap between above-mentioned piston 6 and the cylinder 4 by above-mentioned oily supplying pipe 18a, thereby play cooling and lubrication.
In addition, carry out the straight line back and forth movement in order to make above-mentioned piston 6 in above-mentioned cylinder 4 inside, above-mentioned cylinder 4 forms hollow shape.And a side of above-mentioned cylinder 4 is formed with compression volume P.And above-mentioned cylinder 4 preferably at one end under the state adjacent to above-mentioned intake channel 2a inboard, is arranged on the same straight line with above-mentioned intake channel 2a.
In above-mentioned cylinder 4, the above-mentioned piston 6 of an end adjacent inner setting can carrying out straight line back and forth movement with above-mentioned intake channel 2a; With opposite direction one end of above-mentioned intake channel 2a above-mentioned discharge valve group 24 is set.
Here, above-mentioned discharge valve group 24 comprises following components and constitutes: for discharge cover (cover) 24a that is provided with in the certain discharge space of a distolateral formation of above-mentioned cylinder 4; The discharge valve 24b that is provided with for compression volume P side one end of the above-mentioned cylinder of switch; Be arranged between above-mentioned discharge cover 24a and the discharge valve 24b, axially give valve spring (valve-spring) 24c of elastic force.Here, valve spring is a kind of disc spring.In addition, an end inner peripheral surface of above-mentioned cylinder 4 is inlayed and is provided with O type ring R, and makes above-mentioned discharge valve 24a seal above-mentioned cylinder 4 one ends with this.
In addition, be connected with the loop pipe (loop-pipe) 28 that is bent to form between the side of above-mentioned discharge cover 24a and the above-mentioned outlet pipe 2b.Here, the effect of above-mentioned loop pipe 28 is: not only can guide the refrigerant of compression to be discharged to the outside, can also cushion the phenomenon that vibration that the interaction of above-mentioned cylinder 4, piston 6, linear electric machine 10 causes is sent to above-mentioned seal container 2 integral body.
In addition, along with above-mentioned piston 6 carries out the straight line back and forth movement in above-mentioned cylinder 4 inside, if the pressure of above-mentioned compression volume P reaches more than certain head pressure, above-mentioned valve spring 24c will be compressed the open above-mentioned discharge valve 24b in back.Then, refrigerant will be discharged to the outside fully along above-mentioned loop pipe 28 and outlet pipe 2b after discharging from above-mentioned compression volume P.
Then, flow in order to make the refrigerant that flows into from above-mentioned intake channel 2a, the central authorities of above-mentioned piston 6 are formed with refrigerant flow 6b.Suction zone (IN) end adjacent with above-mentioned intake channel 2a relies on connector element directly to connect above-mentioned linear electric machine 10 is set.Opposition side discharging area (OUT) end of above-mentioned intake channel 2a is provided with above-mentioned inhaling valve 22, and towards the moving direction of above-mentioned piston, is supported being provided with by various springs.
At this moment, above-mentioned inhaling valve 22 is a thin sheet form, and for the refrigerant flow 6a of the above-mentioned piston of switch, a part of cutting central authorities forms, and the one side relies on screw to be fixedly set in the end of above-mentioned piston 6a.
In addition, along with above-mentioned piston 6 carries out the straight line back and forth movement in above-mentioned cylinder 4 inside, the pressure of above-mentioned compression volume P reaches below the certain suction pressure that is lower than above-mentioned head pressure, and above-mentioned inhaling valve 22 will be opened, and refrigerant is drawn into above-mentioned compression volume P.In case the pressure of above-mentioned compression volume P reaches more than certain suction pressure, will compress the refrigerant of above-mentioned compression volume P under above-mentioned inhaling valve 22 closing state.
Special needs to be pointed out is that above-mentioned piston 6 is provided with towards the moving direction elastic support.Specifically, protrude from the piston flange 6b of an end of the piston 6 adjacent, rely on mechanical spring 8a such as disc spring with above-mentioned intake channel 2a to radial direction, 8b towards the moving direction of above-mentioned piston 6 by elastic support.The refrigerant that is contained in the opposition side compression volume P of above-mentioned intake channel 2a will be gas spring according to the resilient force of self, the above-mentioned piston 6 of elastic support.
Here, above-mentioned mechanical spring 8a, 8b have and the irrelevant certain mechanical spring COEFFICIENT K of load
mAbove-mentioned mechanical type spring 8a, 8b is a benchmark with above-mentioned piston flange 6b, axially is set up in parallel separately on above-mentioned cylinder 4 with the certain support frame 26 that is fixed in above-mentioned linear electric machine 10.And the mechanical spring 8a that is supported in above-mentioned support frame 26 preferably has identical mechanical spring COEFFICIENT K with the mechanical spring 8b that is arranged at above-mentioned cylinder 4
m
But above-mentioned gas spring has the gas spring COEFFICIENT K that exists with ... load and change
gThe gas that is contained in above-mentioned compression volume P will be along with the rising of peripheral temperature, make the pressure of refrigerant become big, makes self elastic force become big.So gas spring COEFFICIENT K of above-mentioned gas spring
gWill be along with load becomes big and becomes big.
At this moment, because above-mentioned mechanical type spring constant K
mValue be definite value, and above-mentioned gas spring COEFFICIENT K
gThen exist with ... load and change, so the Monolithic spring coefficient also will exist with ... changing load.According to above-mentioned mathematical expression 1 as can be known, the natural frequency f of piston
nEqually also exist with ... above-mentioned gas spring COEFFICIENT K
gAnd change.
Therefore, even it is variable to load, above-mentioned mechanical type spring constant K
mThe mass M that reaches piston then is a definite value, in contrast, and above-mentioned gas spring COEFFICIENT K
gThen be variable, therefore exist with ... load and the above-mentioned gas spring COEFFICIENT K of variation
gWill be to the natural frequency f of piston
nCause very big influence.The natural frequency f of above-mentioned piston
nControl according to the frequency program of inferring of load variations utilizing.And the operation frequency f of control linear electric machine
c, make the natural frequency f of itself and piston
nSynchronizing, thus compressor efficiency can be improved, and can reduce load rapidly.
Certainly, above-mentioned load can be measured by several different methods.Because above-mentioned Linearkompressor is contained in the freezing/idle call system of compression, condensing, evaporation, expansion refrigerant, therefore above-mentioned load can be defined as the difference between the pressure evaporating pressure of the condensing pressure of pressure of condensing refrigerant and evaporation refrigerant.In order further to improve precision, also can take into account the mean pressure that condensing pressure and evaporation are pressed.
That is, above-mentioned load is poor between pressing with above-mentioned condensing pressure and evaporation, and mean pressure is that ratio is calculated.Above-mentioned load is big more, above-mentioned gas spring COEFFICIENT K
gAlso will be big more.As an example wherein, the difference between condensing pressure and evaporation are pressed is big more, and it is then big more to load.Even the difference between condensing pressure and evaporation are pressed is identical, as long as mean pressure is big more, then load is also big more.Therefore, corresponding to aforesaid load, the above-mentioned gas spring COEFFICIENT K that calculates
gAlso will become big.
At this moment, the algorithm of above-mentioned load in fact as shown in Figure 5, at first measuring with condensing pressure is the condensing temperature of ratio and to press with evaporation be the evaporating temperature of ratio, poor with between above-mentioned condensing temperature and the evaporating temperature again, and mean temperature is calculated load.
Specifically, above-mentioned mechanical type spring constant K
mAnd gas spring COEFFICIENT K
gCan determine by kinds of experiments.In the present invention, used the mechanical type spring constant to want little mechanical type spring with respect to the mechanical type spring constant of in the past Linearkompressor, thereby gas spring coefficient shared ratio in the Monolithic spring coefficient is improved, the piston according to load variations is moved in the wider scope of resonant frequency.And can control the operation frequency of above-mentioned linear electric machine easily, make itself and natural frequency synchronizing according to the piston of load variations.
Fig. 6 is the sectional drawing that demonstrates according to coil of the present invention.Coil according to the present invention is to the circumferencial direction lamination, and by plural coil winding layer L1, L2 constitutes.Above-mentioned coil winding layer L1, the number of L2 is decided by the operation frequency f that manufacturer is selected
cNumber.
As shown in the figure, coil winding layer L1, L2 are because the writhing number of coil is different, perhaps because the coil thickness difference will have different induction coefficients.Detailed says that the induction coefficient of coil winding layer L1 is greater than the induction coefficient of coil winding layer L2.
Above-mentioned coil winding layer L1 with different induction coefficients can connect between the L2, perhaps in parallel formation.
Fig. 7 a and Fig. 7 b are the pie graphs that demonstrates the 1st and the 2nd embodiment of the Linearkompressor control gear that is made of coil.
As shown in the figure, above-mentioned linear electric machine 10 comprises following components and constitutes: a plurality of lamination 12a are constituted to the circumferencial direction lamination, and be fixedly set in the inner stator 12 in above-mentioned cylinder 4 outsides according to said frame 18; But twine body 14a periphery at the coil of winding around, a plurality of lamination 14b constituted to the circumferencial direction lamination, in above-mentioned cylinder 4 outsides with the keep at a certain distance away external stator 14 of setting of above-mentioned inner stator 12; Gap between above-mentioned inner stator 12 and external stator 14 is connected the permanet magnet 16 that is provided with connector element 17 according to above-mentioned piston 6.Wherein, above-mentioned coil twines body 14a and can be fixedly set in above-mentioned inner stator 12 outsides.
Special needs to be pointed out is that above-mentioned linear electric machine 10 can make the variation variation of induction coefficient.Specifically, above-mentioned coil winding body 14a is divided into the plural coil winding layer L1 to the circumferencial direction lamination, L2.Above-mentioned linear electric machine 10 is selected at least more than one coil winding layer L1, and L2 provides electric current, makes it produce electromagnetic force.
Here, above-mentioned linear electric machine 10 also should comprise following components and constitute: select at least more than one coil winding layer L1, L2 provides from the branch unit 15,15 ' of the electric current of outside input; According to above-mentioned load, control above-mentioned branch unit 15,15 ', make the variable control gear of whole induction coefficient 18.
At this moment, each coil winding layer L1, L2 can have mutually different induction coefficient L.For example, at each winding layer L1, among the L2, can make the writhing number of coil, perhaps the rugosity diameter of coil is different.
That Fig. 7 a shows is the coil winding layer L1 that coil twines body 14a, the structure when L2 is in parallel.That Fig. 7 b shows is the coil winding layer L1 that coil twines body 14a, and L2 interconnects, and the structure during series connection.According to above-mentioned coil winding layer L1, the coupled condition of L2, branch unit 15,15 ' can have the combination of multiple induction coefficient.
At first, in Fig. 7 a, splicing ear 15a is connected in coil winding layer L1 jointly, the end of L2.Splicing ear 15b is connected in the other end of coil winding layer L1, and splicing ear 15c is connected in the other end of coil winding layer L2.Branch unit 15 can be selected splicing ear 15a all the time, and according to switch 15d from splicing ear 15b, select one at least among the 15c after, input current is provided.Therefore, select the induction coefficient of combination to be divided into according to branch unit 15: second situation when selecting coil winding layer L1, L2 separately; First situation when together selecting coil winding layer L1, L2.In order to connect L1 and L2 side by side, need to increase switch.
In addition, in Fig. 7 b, splicing ear 15a ' is connected in the end of coil winding layer L1, and splicing ear 15b ' is connected in the end of coil winding layer L2, and splicing ear 15c ' is connected in the fulcrum that is connected of coil winding layer L1 and coil winding layer L2.Branch unit 15 ' will be according to switch 15d ', and 15e ' selects 2 from splicing ear 15a ' among the 15b ', 15c ', and provides input current to it.In addition, can be according to the induction coefficient of branch unit 15 ' selection and combination: select splicing ear 15a ', the coil winding layer L1 during 15c '; Select splicing ear 15b ', the coil winding layer L2 during 15c '; Select splicing ear 15a ', the series connection of coil winding layer L1 during 15b ' and coil winding layer L2.
Above-mentioned control gear 18 will judge that the load back (for example, by infer the temperature information of program input according to certain frequency, utilizes the data among Fig. 5 to infer natural frequency f by the condensing temperature and the evaporating temperature of identification refrigerant
nThe back), control the driving of above-mentioned branch unit 15,15 ' according to the size of its load.Above-mentioned control gear 18 will be controlled above-mentioned branch unit 15,15 ', make it when high load or high cold power, select little induction coefficient, make operation frequency f
cUprise.When low-load, then select big induction coefficient, make operation frequency f
cReduce.The purpose that the control gear 18 of above-mentioned branch unit 15,15 ' is controlled is: make operation frequency f
cWith natural frequency f by above-mentioned load variations
nSynchronizing promptly, is able to move under resonance state in order to make above-mentioned Linearkompressor, and the control of in multiple induction coefficient, suitable induction coefficient being made up.
Claims (28)
1, a kind of Linearkompressor is characterized in that, comprising:
Inside is formed with the fixed component of compression volume;
In the inboard of said fixing member, by axial straight line back and forth movement, compression is drawn into the movable link of the refrigerant of compression volume;
To the above-mentioned movable link of traffic direction elastic support of above-mentioned movable link, and at least more than one the spring that makes that spring constant changes according to load;
Be connected with above-mentioned movable link, drive above-mentioned movable link, make it carry out the straight line back and forth movement, and, make its operation frequency f by regulating induction coefficient
cThe linear electric machine that changes.
2, Linearkompressor according to claim 1 is characterized in that:
In freezing/idle call system that above-mentioned Linearkompressor is arranged at, above-mentioned load be by above-mentioned freezing/the idle call system in condensing refrigerant pressure and in above-mentioned rapid steamer the evaporation refrigerant pressure between difference be that proportional meter is calculated.
3, Linearkompressor according to claim 2 is characterized in that:
Above-mentioned load is that the middle pressure of pressing with above-mentioned condensing pressure and evaporation is that proportional meter is calculated.
4 according to any described Linearkompressor of claim 1 to 3, it is characterized in that:
Above-mentioned linear electric machine makes above-mentioned operation frequency f
cWith the resonant frequency f that with the load is the above-mentioned movable link of ratio variation
nSynchronizing.
5, Linearkompressor according to claim 4 is characterized in that:
Above-mentioned linear electric machine can make above-mentioned movable link straight line back and forth movement to similitude.
6, according to any described Linearkompressor of claim 1 to 5, it is characterized in that:
Above-mentioned linear electric machine comprises: the inner stator that a plurality of laminations are constituted to the circumferencial direction lamination; In the outside of above-mentioned inner stator, the setting that keeps at a certain distance away, and the external stator that a plurality of laminations are constituted to the circumferencial direction lamination; Gap between above-mentioned inner stator and external stator, for electromagnetic force takes place, and the coil of winding around twines body; Gap between above-mentioned inner stator and external stator is connected setting with above-mentioned movable link, and twines the electromagnetic force of body and the permanet magnet that the straight line back and forth movement is carried out in interaction according to above-mentioned coil; Wherein, above-mentioned coil winding body is to be made of the plural coil winding layer to the circumferencial direction lamination; Above-mentioned linear electric machine is made of following components: select at least more than one coil winding layer, the branch unit of input current is provided; Twine the body series capacitors with above-mentioned coil; According to above-mentioned load, control above-mentioned branch unit, make the variable control gear of whole induction coefficient.
7, Linearkompressor according to claim 6 is characterized in that:
Above-mentioned coil winding layer has mutually different induction coefficient.
8, Linearkompressor according to claim 7 is characterized in that:
The writhing number of coil is different in the above-mentioned coil winding layer.
9, Linearkompressor according to claim 7 is characterized in that:
Above-mentioned coil winding layer has mutually different coil thickness.
10, according to claim 6 or 9 described Linearkompressors, it is characterized in that:
Above-mentioned control gear is selected little induction coefficient when high load; Select big induction coefficient during low-load, above-mentioned branch unit is controlled.
11, according to claim 6 or 7 described Linearkompressors, it is characterized in that:
Above-mentioned coil winding layer is separated from each other setting.
12, Linearkompressor according to claim 11 is characterized in that:
In the common common terminal that connects of an end of each coil winding layer be connected in separately in plural indivedual terminals of the other end of above-mentioned coil winding layer, above-mentioned branch unit provides above-mentioned electric current at least more than one indivedual terminals.
13, according to claim 6 or 7 described Linearkompressors, it is characterized in that:
Above-mentioned coil winding layer interconnects setting.
14, Linearkompressor according to claim 13 is characterized in that:
Above-mentioned branch unit is to twine in the two ends fulcrum and the connection fulcrum between each coil winding layer of body at above-mentioned coil, selects two fulcrums that above-mentioned electric current is provided.
15, a kind of Linearkompressor is characterized in that:
The control gear of Linearkompressor comprises: towards the circumferencial direction of Linearkompressor, constitute coil by plural coil winding layer and twine body;
Select at least more than one coil winding layer that the branch unit of input current is provided;
Twine the body series capacitors with above-mentioned coil;
According to the above-mentioned branch unit of load control, regulate induction coefficient, make operation frequency f
cVariable control gear.
16, Linearkompressor according to claim 15 is characterized in that:
The coil of Linearkompressor twines body towards the circumferencial direction lamination, and is to be made of the plural coil winding layer with mutually different induction coefficient.
17, Linearkompressor according to claim 16 is characterized in that:
The coil writhing number of the above-mentioned coil winding layer of Linearkompressor control gear is different.
18, Linearkompressor according to claim 16 is characterized in that:
The above-mentioned coil winding layer of Linearkompressor has mutually different coil thickness.
19, according to claim 15 or 18 described Linearkompressors, it is characterized in that:
Above-mentioned control gear in the control gear of Linearkompressor is controlled above-mentioned branch unit, makes it when high load, selects little induction coefficient, when low-load, then selects big induction coefficient.
20, according to claim 15 or 16 described Linearkompressors, it is characterized in that:
Above-mentioned coil winding layer in the control gear of Linearkompressor is separated from each other setting.
21, Linearkompressor according to claim 20 is characterized in that:
In the control gear of Linearkompressor, above-mentioned branch unit is in the common terminal of an end that is connected in each coil winding layer jointly, in plural indivedual terminals of the other end that is connected in above-mentioned coil winding layer separately, provide above-mentioned input current to more than one indivedual terminals at least.
22, according to claim 15 or 16 described Linearkompressors, it is characterized in that:
The above-mentioned coil winding layer of the control gear of Linearkompressor is interconnective.
23, want 22 described Linearkompressors according to right, it is characterized in that:
Above-mentioned branch unit in the control gear of Linearkompressor will twine the two ends fulcrum of body and the connection fulcrum between each coil winding layer from above-mentioned coil selects 2 fulcrums, and provides input current to it.
24, a kind of Linearkompressor is characterized in that:
It is by making coil to the circumferencial direction lamination that the coil of Linearkompressor twines body, and the coil winding layer with mutually different induction coefficient more than two constitutes.
25, Linearkompressor according to claim 24 is characterized in that:
The coil writhing number of the above-mentioned coil winding layer of the coil winding body of Linearkompressor is different.
26, Linearkompressor according to claim 24 is characterized in that:
The above-mentioned coil winding layer that the coil of Linearkompressor twines body has mutually different coil thickness.
27, according to claim 24 or 26 described Linearkompressors, it is characterized in that:
The above-mentioned coil winding layer that the coil of Linearkompressor twines body is separated from each other setting.
28, according to claim 24 or 26 described Linearkompressors, it is characterized in that:
The above-mentioned coil winding layer that the coil of Linearkompressor twines body interconnects setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410072487 CN1766332A (en) | 2004-10-27 | 2004-10-27 | Linear compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410072487 CN1766332A (en) | 2004-10-27 | 2004-10-27 | Linear compressor |
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| Publication Number | Publication Date |
|---|---|
| CN1766332A true CN1766332A (en) | 2006-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410072487 Pending CN1766332A (en) | 2004-10-27 | 2004-10-27 | Linear compressor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104487706A (en) * | 2012-05-16 | 2015-04-01 | 诺沃皮尼奥内股份有限公司 | Electromagnetic actuator for a reciprocating compressor |
| CN107288841A (en) * | 2016-03-30 | 2017-10-24 | 青岛海尔智能技术研发有限公司 | Linear compressor and its assemble method |
| US10184464B2 (en) | 2012-05-16 | 2019-01-22 | Nuovo Pignone Srl | Electromagnetic actuator and inertia conservation device for a reciprocating compressor |
| CN110259663A (en) * | 2019-06-25 | 2019-09-20 | 辽宁工程技术大学 | A kind of novel moving-magnetic type reciprocal linear compressor |
-
2004
- 2004-10-27 CN CN 200410072487 patent/CN1766332A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104487706A (en) * | 2012-05-16 | 2015-04-01 | 诺沃皮尼奥内股份有限公司 | Electromagnetic actuator for a reciprocating compressor |
| US10030638B2 (en) | 2012-05-16 | 2018-07-24 | Nuovo Pignone Srl | Electromagnetic actuator for a reciprocating compressor |
| US10184464B2 (en) | 2012-05-16 | 2019-01-22 | Nuovo Pignone Srl | Electromagnetic actuator and inertia conservation device for a reciprocating compressor |
| CN107288841A (en) * | 2016-03-30 | 2017-10-24 | 青岛海尔智能技术研发有限公司 | Linear compressor and its assemble method |
| CN107288841B (en) * | 2016-03-30 | 2020-07-07 | 青岛海尔智能技术研发有限公司 | Linear compressor and assembling method thereof |
| CN110259663A (en) * | 2019-06-25 | 2019-09-20 | 辽宁工程技术大学 | A kind of novel moving-magnetic type reciprocal linear compressor |
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