CN1808023A - Refrigeration circulating system and control method thereof - Google Patents
Refrigeration circulating system and control method thereof Download PDFInfo
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- CN1808023A CN1808023A CN 200510002526 CN200510002526A CN1808023A CN 1808023 A CN1808023 A CN 1808023A CN 200510002526 CN200510002526 CN 200510002526 CN 200510002526 A CN200510002526 A CN 200510002526A CN 1808023 A CN1808023 A CN 1808023A
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Abstract
The invention relates to a refrigeration cycle system, which comprises a compressor, a condenser, an electromagnetic expansion valve with variable flux, a evaporator and the connection pipes connecting them to form a refrigeration cycle. The invention also comprises a detecting device for detecting the compressor, and when it detects the compressor is abnormal, it can send a wrong signal; a control device for stopping the compressor when receiving the wrong signal and starting the compressor after a preset time; the electromagnetic expansion valve can be opened more than before, when the compressor is started again. The invention can effectively improve the secondary starting condition of compressor, reduce the possibility of abnormal operation of compressor, prolong the normal operation time, apply a convenience environment of user, and apply the protection of compressor.
Description
Technical field
The present invention relates to a kind of refrigerating circulation system and control method thereof, more particularly, the present invention relates to a kind of refrigerating circulation system and control method thereof that is used for air-conditioning system.
Background technology
In the prior art, refrigerating circulation system used in the air-conditioning system consists essentially of compressor, condenser, throttling arrangement, evaporimeter and refrigerant pipe.The refrigerant pipe couples together these parts forms the freeze cycle loop.
In some cases, operation irregularity may appear in compressor, causes overwork.For example summer indoor or outdoors temperature very high, perhaps voltage is very low, perhaps the heat radiation of heat exchanger is obstructed etc., causes operating temperature rising, pressure overrun of compressor etc.When operation irregularity appears in compressor; such as; the compressor operating temperature is extraordinary, or the high and low pressure pressure of compressor is extraordinary, or compressor occurs because of voltage is very low when unusual; compressor stops automatically; the self-protection system of compressor starts working, through after a while, such as a few minutes; after temperature or pressure recovery normally, compressor can start once more.But still exist if cause the unusual condition of compressor operating this moment, generally can not reduce at short notice such as the continuous high temperature in summer, perhaps voltage is still very low, or the like, compressor may occur unusual in the short period after starting once more once more, shuts down once more.
Usually use capillary in the throttling arrangement of existing refrigerating circulation system, but there is the shortcoming that can not carry out Flow-rate adjustment, therefore, also useful electromagnetic expanding valve is as throttling arrangement.Under with the situation of electromagnetic expanding valve as throttling arrangement, electromagnetic expanding valve is closed when compressor shuts down at every turn.Though electromagnetic expanding valve has the variable advantage of flow as throttling arrangement, electromagnetic expanding valve all reopens with identical aperture at every turn when compressor is restarted and starts working.Suppose that the aperture of electromagnetic expanding valve when initial start is T0, the aperture when starting for the first time is T1, and the aperture when starting for the second time is T2, and the aperture during the i time startup is Ti, wherein, and T1=T2=......=Ti.......It is identical that the aperture that electromagnetic expanding valve reopens when restarting at every turn all keeps, at every turn restarting of compressor still is what carry out under same condition like this, owing to the reason that causes compressor to shut down may not be eliminated soon, so compressor may be after the short time of work shuts down unusually once more because of appearance once more.
Like this, compressor starts under identical condition repeatedly, so circulation, and up to the pre-determined number of the number of times of restarting above system, whole system finally quits work, till compressor is no longer worked.Therefore, cause when the user needs air-conditioning air-conditioning system to shut down on the contrary, can not provide comfortable environment for the user.This is that the user is undesirable.In addition, compressor in the short period of time repeated priming, stop, being unfavorable for protecting compressor.
Therefore, need a kind of refrigerating circulation system, can improve the working environment when restarting, thereby make the compressor can the relatively long time of operate as normal after restarting, and then for the user provides more comfortable environment, and help the protection of compressor.
Summary of the invention
An object of the present invention is to provide a kind of refrigerating circulation system; working environment when it can improve compressor and restarts; make the compression function start the long time of back operate as normal once more, thereby, help protecting compressor simultaneously for the user provides comfortable environment.
Another object of the present invention is to provide a kind of control method of refrigerating circulation system, can improve the working environment that compressor is restarted, and refrigerating circulation system can more effectively be worked, and comes for the user provides comfortable environment, and protects compressor effectively.
The invention provides a kind of refrigerating circulation system, this system comprises electromagnetic expanding valve, the evaporimeter of compressor, condenser, changeable flow and the tube connector that connects at least between them, it is characterized in that, described system also comprises: checkout gear, whether detect compressor occurs unusually, occur sending an error signal when unusual when detecting compressor; Control device receives the signal that described checkout gear sends, and when receiving described error signal, the control compressor shuts down, and at the fixed time, restarts compressor; When restarting, opens by described compressor the aperture when its aperture when restarting started greater than last time with described electromagnetic expanding valve.
The present invention also provides a kind of control method of refrigerating circulation system, the described refrigerating circulation system of described refrigerating circulation system comprises electromagnetic expanding valve, the evaporimeter of compressor, condenser, changeable flow and the tube connector that connects at least between them, it is characterized in that, whether described method comprises step: occur unusually with the checkout gear compressor, occur sending an error signal when unusual when detecting compressor; Receive the signal that described checkout gear sends with control device, when receiving described error signal, the control compressor shuts down, and at the fixed time, starts compressor once more; With when described compressor starts once more, open described electromagnetic expanding valve, the aperture when its aperture when restarting started greater than last time.
Compared with prior art; refrigerating circulation system of the present invention and control method thereof; can under identical external condition, more effectively work; as under identical outdoor environmental conditions; the compression function is starting the longer time of back work once more; thereby can provide comfortable environment more for the user, and help the protection of compressor.Therefore, refrigerating circulation system of the present invention and control method thereof more can satisfy user's needs than prior art, can protect compressor effectively simultaneously.
Description of drawings
Fig. 1 illustrates the schematic diagram of refrigerating circulation system of the present invention; With
Fig. 2 illustrates the schematic diagram of refrigerating circulation system control method flow process of the present invention.
The specific embodiment
Fig. 1 is the schematic diagram that refrigerating circulation system of the present invention is shown, and below comes by Fig. 1 that the present invention will be described.
Refrigerating circulation system of the present invention comprises compressor 1, condenser 2, and the electromagnetic expanding valve 3 of changeable flow, evaporimeter 4, and between them, connect to form the tube connector 5 in freeze cycle loop.Refrigerating circulation system also comprises the control device 6 of control refrigerating circulation system work and is used for detecting compressor unusual checkout gear 7 whether occurs.In the present invention, when detecting compressor 1, checkout gear 7 occurs sending an error signal when unusual.The signal that control device 6 receiving detection devices 7 send, when receiving described error signal, control compressor 1 shuts down, and at the fixed time, starts compressor 1 once more.When compressor 1 started once more, electromagnetic expanding valve 3 was opened, the aperture when its aperture when restarting started greater than last time, and the aperture big aperture of electromagnetic expanding valve 3 when starting than last time opened work.
Below continue the first embodiment of the present invention to be described with reference to Fig. 1.In the present embodiment, when air-conditioning system is connected power supply, when refrigerating circulation system is started working, compressor 1 initial start, electromagnetic expanding valve 3 is opened, refrigerant from compressor 1 through tube connector 5 to condenser 2, again through tube connector 5, electromagnetic expanding valve 3 to evaporimeter 4, after tube connector 5 returns compressor 1 periodic duty.When compressor 1 initial start, electromagnetic expanding valve 3 is opened with initial opening T0 and is started working, and in the present invention, the aperture of electromagnetic expanding valve is meant degree or the size that it is opened.The initial opening T0 of expansion valve can determine that with requiring this can understand for a person skilled in the art fully as the case may be.
In the present embodiment, checkout gear 7 preferably includes the first sensor 10 and second sensor 20 that is positioned at compressor 1 exit, and whether the temperature and pressure that spues that detects compressor 1 respectively surpasses its reservation threshold.When the temperature and pressure that detects compressor 1 exit when checkout gear 7 surpassed the reservation threshold of temperature and pressure, compressor 1 was working properly.If the work of compressor 1 occurs unusual, for example, because the weather sweltering heat, outdoor temperature is very high, and compressor 1 live load is excessive, the temperature in compressor 1 exit is increased, surpass under the situation of its reservation threshold, checkout gear 7 surpasses its reservation threshold by the temperature that first sensor 10 detects compressor 1 exit, sends an error signal, the error signal that control device 6 receiving detection devices 7 send, control compressor 1 shuts down automatically.After after a while, temperature falls after rise, and compressor 1 is restarted for the first time, and at this moment, electromagnetic expanding valve 3 is opened, to start working greater than the aperture of initial opening T0.That is to say that when compressor 1 started once more, it is big that the aperture of electromagnetic expanding valve 3 becomes, its degree of opening is bigger than its degree of opening when the initial start.In the case, because the aperture of electromagnetic expanding valve 3 increases, help alleviating the live load of compressor 1, improve the working environment of compressor 1, compressor 1 is started under the advantageous conditions and running starting than the last time more, thereby even not have also can reduce the possibility that operation irregularity appears in compressor 1 once more greatly under the situation of elimination causing compressor 1 unusual reason to occur, prolonged the normal working hours of compressor 1, even may make compressor 1 operation irregularity no longer occur.Thus for the user provides comfortable environment, and help the protection of compressor.
Suppose that the aperture of electromagnetic expanding valve 3 when restarting for the first time is T1, T1＞T0 is then arranged.Because the aperture of opening when the aperture that electromagnetic expanding valve 3 is opened when starting once more started greater than last time, between the aperture of electromagnetic expanding valve 3 when twice starts an increment Delta T is arranged like this, this increment is aperture and aperture when last time restarting poor of electromagnetic expanding valve 3 when this is restarted.Therefore, when compressor 1 was restarted for the first time, the aperture that electromagnetic expanding valve 3 is opened was greater than initial opening T0, and electromagnetic expanding valve 3 has increased an increment Delta T, Δ T=T1-T0 at the opening ratio initial opening T0 that restarts for the first time.
Similarly, the excessive reservation threshold that surpasses of high-pressure that causes its exit when compressor 1 because of some reason, when compressor 1 work appearance is unusual, checkout gear 7 surpasses its reservation threshold by the pressure that second sensor 20 detects compressor 1 exit, send an error signal, the error signal of control device 6 receiving detection devices 7, control compressor 1 shuts down.After after a while, pressure falls after rise, and compressor 1 is restarted, at this moment, electromagnetic expanding valve 3 is opened, and the aperture that electromagnetic expanding valve 3 started in opening ratio last time of this startup becomes big, and the aperture big aperture of electromagnetic expanding valve 3 when restarting than last time opened work.This startup of supposing compressor 1 is that compressor is restarted and turn round the second time after restarting the above-mentioned first time, and the aperture when then the opening ratio of electromagnetic expanding valve 3 when restarting for the second time restarted for the first time wants big.Because the aperture of electromagnetic expanding valve 3 increases, help alleviating the live load of compressor 1, improve the working environment of compressor 1, compressor 1 is restarted under the advantageous conditions starting than the last time more, thereby under the situation that causes the unusual reason of compressor 1 appearance not have to eliminate, greatly reduce compressor 1 and occur the possibility of operation irregularity once more, prolonged compressor 1 and restarted the time of back operate as normal at this.Thus for the user provides comfortable environment, and help the protection of compressor.
Suppose that the aperture of electromagnetic expanding valve when restarting for the second time is T2, then T2＞T1.When compressor 1 was restarted for the second time, electromagnetic expanding valve 3 was opened the aperture of the starting working aperture when restarting for the first time, the increase that the opening ratio of electromagnetic expanding valve 3 when restarting for the second time restarted for the first time an increment Delta T, Δ T=T2-T1.
In the present embodiment, electromagnetic expanding valve 3 can have respectively the increment with first and second sensors 10 and 20 corresponding apertures.The unusual error signal that sends occurs when checkout gear 7 detects compressor operating by first sensor 10, the increment that the aperture the when opening ratio of electromagnetic expanding valve 3 when restarting started last time increases is corresponding with first sensor 10.Unusually send error signal when checkout gear 7 detects compressor by second sensor 20, the increment that the aperture the when opening ratio of electromagnetic expanding valve 3 when restarting started last time increases is corresponding with second sensor 20.For example, to restart for the first time be that checkout gear 7 detects compressor 1 work by first sensor 10 and caused by abnormal occurs for machine 1 owing to contract, therefore, the opening ratio initial opening of electromagnetic expanding valve 3 when restarting for the first time increased by one and first sensor 10 corresponding increments, and Δ T can be Δ T
10, Δ T is arranged
10=T1.T0.Because it is owing to be that checkout gear 7 detects compressor 1 work by second sensor 20 and caused by abnormal occurs that compressor 1 is restarted for the second time, therefore, the aperture that the opening ratio of electromagnetic expanding valve 3 when restarting for the second time restarted has for the first time increased and second sensor, 20 corresponding increments, and Δ T can be Δ T
20, Δ T is arranged
20=T2-T1.
By above explanation as can be known, in refrigerating circulation system of the present invention, when checkout gear 7 detects compressor 1 operation irregularity by sensor, send an error signal, control device 6 is received described error signal, the control compressor shuts down, and at the fixed time, start compressor once more, open electromagnetic expanding valve, aperture when the opening ratio that electromagnetic expanding valve is restarted at compressor started last time increases, and so moves in circles.Aperture when the aperture of electromagnetic expanding valve 3 when at every turn restarting restarted greater than last time, the working environment when thereby constantly improvement is restarted at every turn, compressor is started under the advantageous conditions and running starting than the last time more, and then reach the purpose of its normal working hours of prolongation.
The aperture of opening when the opening ratio that electromagnetic expanding valve 3 is opened when restarting at every turn started last time increases, and the increment of electromagnetic expanding valve 3 apertures can be corresponding with first and second sensors 10 and 20 respectively, and the aperture TX of electromagnetic expanding valve 3 when restarting for the X time is:
TX＝T0+ΔT
10×N
10+ΔT
20×N
20，
Wherein, N
10Be that checkout gear 7 unusual number of times occurs by first sensor 10 detected compressor 1 work, or the number of times restarted of the compressor therefore, also can be that checkout gear 7 detects the number of times that operation irregularity sends error signal by first sensor 10, and similarly, N
20For unusual number of times occurring, or the number of times restarted of compressor, or send out the number of times of signal with the corresponding compressor operating of second sensor 20.
For restarting N for the first time
10=1, N
20=0, T1=T0+ Δ T
10
For restarting N for the second time
10=1, N
20=1, T2=T0+ Δ T
10+ Δ T
20
Wherein, with the increment Delta T of first and second sensors 10 and 20 corresponding electromagnetic expanding valve 3 apertures
10With Δ T
20Can be identical, also can be different, promptly can get Δ T
10=Δ T
20, also can get Δ T
10≠ Δ T
20Obviously, this can select with needs as the case may be.
Though, more than be hypothesis for the first time be unusually by first sensor 10 detected and be unusually for the second time by second sensor, 20 detected situations under, present embodiment is illustrated, but will be understood that it to be detected unusually by any one sensor at every turn.And, though more than be with first sensor 10 detected temperatures, with second sensor, 20 detected pressures, it is evident that vice versa.
In refrigerating circulation system of the present invention, the increment Delta T of the aperture of electromagnetic expanding valve 3 when at every turn restarting can determine with requiring as the case may be, its span can be zero between the difference of the maximum opening of electromagnetic expanding valve and its initial opening, that is to say, the increment of aperture comprises greater than zero to any amount that is less than or equal between maximum opening and the initial opening difference, i.e. 0＜Δ T≤T
MAX-T0, wherein T
MAXMaximum opening for electromagnetic expanding valve 3.
In the present invention, control device 6 also can comprise comparison means, and aperture and its maximum opening when being used for electromagnetic expanding valve 3 restarted at every turn compare.Aperture when electromagnetic expanding valve 3 starts once more is during greater than maximum opening, aperture when the aperture of electromagnetic expanding valve 3 when restarting started with last time is identical or be equivalent to the maximum opening of electromagnetic expanding valve 3, that is the aperture when, electromagnetic expanding valve started with last time when restarting or open work with maximum opening.In other words, if the aperture when judging electromagnetic expanding valve 3 certain being restarted at compressor 1 surpasses the maximum opening of electromagnetic expanding valve 3, the aperture when its aperture when restarting started with last time is identical, perhaps is its maximum opening.
Below continue an alternative embodiment of the invention to be described with reference to Fig. 1.As shown in Figure 1, in the present embodiment, checkout gear 7 can comprise a sensor 10 or 20, and whether the temperature or the pressure that are used for detecting the compressor outlet place surpass its reservation threshold, and other parts are identical with first embodiment, no longer are illustrated at this.In the present embodiment,, checkout gear 7 occurs sending an error signal when unusual when detecting compressor 1 work by sensor 10 or 20, warnings that make mistakes, and the error signal of control device 6 receiving detection devices 7 transmissions is controlled compressor 1 and is shut down.After after a while, it is normal that the temperature in compressor 1 exit or pressure recover, and compressor 1 starts once more, and at this moment, electromagnetic expanding valve 3 is opened, and aperture becomes greatly, and the aperture of electromagnetic expanding valve 3 when starting greater than last time opened work.In the present embodiment, when compressor 1 was restarted at every turn, the degree that electromagnetic expanding valve 3 is opened was bigger than its degree of opening when started last time, therefore, had effect same as the previously described embodiments and effect, no longer illustrated at this.
In the present embodiment, the aperture TX of electromagnetic expanding valve 3 when restarting for the X time is:
TX=T0+ Δ T
10* N
10, or TX=T0+ Δ T
20* N
20
Below continue an alternative embodiment of the invention to be described with reference to Fig. 1.As shown in Figure 1, in the present embodiment, checkout gear 7 can comprise a sensor 30 that is positioned at compressor 1 import department, whether be used for detecting the low pressure of compressor 1 import department above its reservation threshold, promptly whether be lower than its reservation threshold, other parts are identical with first embodiment, no longer are illustrated at this.In the present embodiment, when checkout gear 7 surpasses its reservation threshold by the pressure that sensor 30 detects compressor 1 import department, when compressor 1 work appearance is unusual, send an error signal, warning makes mistakes, the error signal that control device 6 receiving detection devices 7 send, control compressor 1 shuts down.After after a while, it is normal that pressure recovers, and compressor 1 starts once more, and at this moment, electromagnetic expanding valve 3 is opened, and it is big that aperture becomes, and starts working with the aperture that started greater than last time.In the present embodiment, when compressor 1 started once more, its aperture of opening when compressor started for 1 last time of the opening ratio that electromagnetic expanding valve 3 is opened wanted big, therefore, have effect same as the previously described embodiments and effect, no longer illustrates at this.
In the present embodiment, the aperture TX of electromagnetic expanding valve 3 when restarting for the X time is:
TX＝T0+ΔT
30×N
30。
Below continue an alternative embodiment of the invention to be described with reference to Fig. 1.As shown in Figure 1, in the present embodiment, checkout gear 7 can comprise a sensor 40, and whether the operating current that is used for detecting compressor 1 is above its reservation threshold, and other parts are identical with first embodiment, no longer illustrate at this.In the present embodiment, when checkout gear 7 surpasses its reservation threshold by the operating current that sensor 40 detects compressor 1, when compressor 1 work appearance is unusual, send an error signal, warning makes mistakes, the error signal that control device 6 receiving detection devices 7 send, control compressor 1 shuts down automatically.After after a while, it is normal that electric current recovers, and compressor 1 starts once more, and at this moment, electromagnetic expanding valve 3 is opened, and it is big that aperture becomes, and starts working with the aperture that started greater than last time.In the present embodiment, when compressor 1 started once more, its aperture of opening when compressor started for 1 last time of the opening ratio that electromagnetic expanding valve 3 is opened wanted big, therefore, have effect same as the previously described embodiments and effect, no longer illustrates at this.
In the present embodiment, the aperture TX of electromagnetic expanding valve 3 when restarting for the X time is:
TX＝T0+ΔT
40×N
40。
Continuation is with reference to Fig. 1, in other embodiments of the invention, checkout gear 7 also can comprise sensor 50 that is positioned at condenser 2 and/or the sensor 60 that is positioned at evaporimeter 4, and whether the temperature or the pressure that are used for detecting condenser 2 and/or evaporimeter 4 surpass reservation threshold, or the like.
In the present invention, checkout gear 7 can comprise at least one sensor, be used for detecting the temperature of the compressor, condenser and/or the evaporimeter that reflect the compressor operating situation, pressure, and compressor operating electric current, or the like, and will record temperature, and pressure, the equivalent and corresponding reservation threshold of electric current compares, surpassing under the situation of reservation threshold, checkout gear 7 sends error signal.In refrigerating circulation system, can set at least one reservation threshold as determining whether compressor 1 work unusual foundation occurs, these reservation thresholds can relate to any aspect of reflection compressor operating situation, temperature, pressure as compressor import and export place, the operating current of compressor, the temperature of condenser, evaporimeter, pressure, or the like, obviously, this can be determined with requiring as the case may be.When the detected object in the system met the reservation threshold that sets, compressor 1 was under the state of operate as normal, and when wherein having one not to be inconsistent, then the work of compressor 1 occurs unusual.
Though, more than describe the present invention by several different embodiment.But, it is evident that the checkout gear in the refrigerating circulation system of the present invention can detect any target of reflection compressor operating situation, and can correspondingly comprise one or several sensors for this reason.Number of sensors and position can be selected with needs as the case may be, such as, can be according to testing goal, test item, object wait to be selected.For example, the checkout gear 7 of refrigerating circulation system of the present invention can comprise a sensor that detects compressor outlet place's temperature or pressure, or two sensors of detection compressor outlet place temperature and pressure, or the sensor of detection compressor inlet pressure, or the sensor of detection compressor operating electric current, or detect the sensor of condenser, evaporator temperature, pressure, or the like, and any combination of these sensors.Above-mentioned any one embodiment of the also optional usefulness of checkout gear 7 of the present invention and combination arbitrarily thereof.
In the present invention, comprise at checkout gear 7 under the situation of several sensors, electromagnetic expanding valve 3 is opened work when compressor 1 is restarted aperture is greater than the aperture when starting last time, and electromagnetic expanding valve 3 can have an increment with each corresponding aperture of several sensors.When checkout gear 7 is to detect compressor by in several sensors any one operation irregularity to occur, send error signal, compressor 1 shuts down, the aperture of electromagnetic expanding valve 3 when compressor 1 starts once more becomes big, and the aperture when starting than last time increases and the corresponding increment of this sensor.Suppose to detect compressor 1 operation irregularity by i sensor, then the increase of the aperture that started last time of the opening ratio restarted at compressor 1 of electromagnetic expanding valve 3 with i the corresponding increment of sensor, Δ T is Δ T
I0Obviously, with the increment of corresponding electromagnetic expanding valve 3 apertures of each sensor can be identical, also can be different, can also be some identical some is different, this can select with requiring as the case may be.Such as, Δ T
10=Δ T
20=Δ T
30...; Δ T
10≠ Δ T
20≠ Δ T
30...; Δ T
10=Δ T
20, Δ T
10≠ Δ T
30...; Or the like.
The increment of electromagnetic expanding valve 3 apertures can be corresponding with each sensor, and the aperture TX of electromagnetic expanding valve 3 when restarting for the X time is:
TX＝T0+ΔT
10×N
10+ΔT
20×N
20+......+ΔT
i0×N
i0+......
Wherein, Δ T
10, Δ T
20..., Δ T
I0Expression and the first, the second respectively ..., the increment of the aperture of the corresponding electromagnetic expanding valve 3 of i sensor; N
10, N
20..., N
I0Expression is with the first, the second respectively ..., i the corresponding compressor 1 of sensor restart number of times, or unusual number of times appears in work, or the number of times of transmission error signal, or the like.
In refrigerating circulation system of the present invention, control device 6 also can comprise a counting device, is used for recording compressed machine 1 work unusual number of times to occur, or the times N of restarting, and also can be used to write down the times N that sends error signal etc.Counting device can comprise one or more counters or accumulator etc., respectively record and corresponding these number of times of each sensor.After the summation, obtain compressor operating and unusual number of times occurs, or the number of times of restarting, or the times N of transmission error signal etc., N=N
10+ N
20+ ...+N
I0+ ....
In refrigerating circulation system of the present invention, control device also can comprise a comparison means, restarting number of times or unusual number of times occurring and pre-determined number compares record, when the record restart number of times or unusual number of times occurs greater than described pre-determined number the time, refrigerating circulation system quits work, that is, when N＞pre-determined number, system quits work.Refrigerating circulation system restarts when starting shooting after the air-conditioning system shutdown again, and counting device makes zero, and the aperture of electromagnetic expanding valve 3 is got back to initial opening T0, opens with initial opening T0 and starts working.This pre-determined number can be determined with requiring as the case may be.For example, can be for to helping protecting compressor, or selected for the consideration of electromagnetic expanding valve maximum opening or the like aspect.
The present invention also provides the control method of refrigerating circulation system.In control method of the present invention, refrigerating circulation system comprises compressor 1, condenser 2, and the electromagnetic expanding valve 3 of changeable flow, evaporimeter 4, and between them, be connected to form tube connector 5 with the freeze cycle loop.Refrigerating circulation system also comprises the control device 6 of control refrigerating circulation system work and is used for detecting compressor unusual checkout gear 7 whether occurs.When detecting compressor, checkout gear 7 occurs sending an error signal when unusual.The signal that control device 6 receiving detection devices 7 send, and receiving that error signal time control system compressor shuts down, and starting compressor once more through after the scheduled time.When compressor started once more, electromagnetic expanding valve 3 was opened, the aperture when its aperture when restarting started greater than last time, and the aperture big aperture of electromagnetic expanding valve 3 when starting than last time opened work.
Referring now to Fig. 2, method of the present invention is described.In step 110, air-conditioning system is connected power supply, and refrigerating circulation system is started working, compressor 1 initial start, and electromagnetic expanding valve 3 is opened.In step 120, when compressor 1 initial start, electromagnetic expanding valve 3 is opened with initial opening T0 and is started working.
In step 130, whether checkout gear 7 detects compressor and occurs unusually, if the compressor operate as normal do not occur unusually.If it is unusual that compressor 1 occurs,, send an error signal in step 140.In step 150, the error signal that control device 6 receiving detection devices send, in step 160, control compressor 1 shuts down.After after a while, in step 170, compressor 1 starts once more, and electromagnetic expanding valve 3 is opened.In step 180, the aperture the when opening ratio that electromagnetic expanding valve 3 is opened when starting once more started last time increases, and its bigger aperture of aperture when starting than last time when starting is once more opened work.Afterwards, proceed to step 130, whether checkout gear detects compressor and occurs unusually.Next, repeat above-mentioned steps, as shown in Figure 2.
In the method for the invention, because the aperture of electromagnetic expanding valve 3 when restarting increases at every turn, therefore, working environment when having improved warm boot effectively, make compressor 1 restart under the advantageous conditions and turn round starting than the last time more, thereby under the situation that does not have to eliminate in the reason that causes compressor 1 to shut down, greatly reduce the possibility that operation irregularity appears in compressor 1 once more, prolonged the normal working hours of compressor 1.Thus for the user provides comfortable environment, and help the protection of compressor.This method has identical effect and the effect with previous embodiment, no longer describes at this.
As previously mentioned, because the aperture the when opening ratio of electromagnetic expanding valve 3 when starting once more started last time increases, electromagnetic expanding valve 3 has an increment Delta T between the aperture of twice startup like this, its value can be zero between the difference of the maximum opening of electromagnetic expanding valve and initial opening, that is to say, the increment of aperture comprises greater than zero to any value that is less than or equal between maximum opening and the initial opening difference, 0＜Δ T≤T
MAX-T0.Details please refer to above stated specification.
In the method for the invention, the aperture the when opening ratio of electromagnetic expanding valve 3 when at every turn restarting restarted last time increases, and the aperture TX of electromagnetic expanding valve 3 when restarting for the X time is:
TX＝T0+ΔT
10×N
10+ΔT
20×N
20+......+ΔT
i0×N
i0+......
In the method for the invention, the aperture of electromagnetic expanding valve and increment thereof can be determined by control device 6.Control device 6 can be determined aperture, the aperture increment of electromagnetic expanding valve when at every turn restarting, and determines that the aperture increment is corresponding with that sensor, or the like.These carry out before can restarting after compressor shuts down.Obviously, control device can adopt existing element, device, method to wait and realize its function.For example, control device 6 can comprise arithmetic unit etc., determines aperture or the increment etc. of electromagnetic expanding valve when at every turn restarting by the calculating of above-mentioned formula.And for example, control device can comprise the device of setting and storing each reservation threshold, and as memory, processor, control device also can comprise central processing unit, controller etc.
In control method of the present invention, control device also can comprise comparison means, and aperture and its maximum opening when being used for electromagnetic expanding valve 3 restarted at every turn compare.Aperture when electromagnetic expanding valve 3 starts once more is during greater than maximum opening, aperture when the aperture that electromagnetic expanding valve 3 is opened when restarting started with last time is identical or equal the maximum opening of electromagnetic expanding valve 3, the aperture when electromagnetic expanding valve started with last time or open work with maximum opening.In other words, if the aperture when judging electromagnetic expanding valve 3 certain being restarted at compressor 1 surpasses the maximum opening of electromagnetic expanding valve 3, its aperture when restarting is identical with the aperture of startup last time, perhaps is its maximum opening.
In the method for the invention, control device also can comprise a counting device, is used for number of times or work that the recording compressed machine restarts unusual number of times to occur, and perhaps device for recording and detecting sends the number of times of error signal, or the like.
In the method for the invention, control device also can comprise a comparison means, with the restarting number of times or unusual number of times occurs and pre-determined number compares of record, when write down restart number of times or unusual number of times occurs greater than described pre-determined number the time, refrigerating circulation system quits work.This pre-determined number can be determined with requiring as the case may be.For example, can be for to helping protecting compressor, or selected for the consideration of aspects such as electromagnetic expanding valve maximum opening.
In the method for the invention, checkout gear can comprise at least one sensor, and number of sensors and position can be selected with requiring as the case may be.Details and above stated specification are similar, no longer illustrate at this.
Though, more than by embodiment refrigerating circulation system of the present invention and control method thereof are illustrated.But, will be understood that those skilled in the art can change the present invention or improve under the situation that does not depart from connotation of the present invention and scope.These changes and improvements all should fall within the scope of the present invention.
Claims (10)
1. a refrigerating circulation system comprises electromagnetic expanding valve, the evaporimeter of compressor, condenser, changeable flow and the tube connector that connects at least between them, it is characterized in that described system also comprises:
Whether checkout gear detects described compressor and occurs unusually, occurs sending an error signal when unusual when detecting described compressor;
Control device receives the signal that described checkout gear sends, and when receiving described error signal, controls described compressor and shuts down, and at the fixed time, restart described compressor;
Described electromagnetic expanding valve is opened when described compressor is restarted, the aperture when its aperture when restarting started greater than last time.
2. refrigerating circulation system as claimed in claim 1, it is characterized in that, aperture when the opening ratio of described electromagnetic expanding valve when described compressor is restarted at every turn started last time increases an increment, and described increment comprises greater than zero to any amount between the maximum opening that is less than or equal to described electromagnetic expanding valve and its initial opening difference when the initial start.
3. refrigerating circulation system as claimed in claim 1, it is characterized in that, described control device comprises a counting device and a comparison means, number of times restarted by described counting device recording compressed machine or unusual number of times appears in the detected compressor of described checkout gear, described comparison means will write down restarts number of times or unusual number of times occurs and pre-determined number compares, when the record restart number of times or unusual number of times occurs greater than described pre-determined number the time, described system quits work.
4. as claim 1 or 3 described refrigerating circulation systems, it is characterized in that, described checkout gear comprises at least one sensor senses device, be positioned at outlet, import department, described condenser and/or the described evaporimeter of described compressor, be used to detect its temperature, pressure, and/or the operating current of described compressor.
5. refrigerating circulation system as claimed in claim 4, it is characterized in that, described electromagnetic expanding valve has the increment with the corresponding aperture of described each sensor, described increment is identical and/or different, when described checkout gear detects described compressor and operation irregularity occurs by one in described at least one sensor, send error signal, the aperture of the opening ratio last time startup of described electromagnetic expanding valve when described compressor starts once more increases by one and the corresponding increment of this sensor.
6. the control method of a refrigerating circulation system, described refrigerating circulation system comprises electromagnetic expanding valve, the evaporimeter of compressor, condenser, changeable flow and the tube connector that connects at least between them, it is characterized in that, described method comprises step:
Whether occur unusually with the described compressor of checkout gear, occur sending an error signal when unusual when detecting described compressor;
Receive the signal that described checkout gear sends with control device, when receiving described error signal, control described compressor and shut down, and at the fixed time, start described compressor once more; With
When described compressor starts once more, open described electromagnetic expanding valve, the aperture when its aperture when restarting started greater than last time.
7. control method as claimed in claim 6, it is characterized in that, described control method comprises that the aperture the when opening ratio of electromagnetic expanding valve when described compressor is restarted at every turn started last time increases an increment, and described increment comprises greater than zero step to any amount between the maximum opening that is less than or equal to described electromagnetic expanding valve and its initial opening difference when the initial start.
8. control method as claimed in claim 6 is characterized in that, described control method further comprises: restart the step that unusual number of times appears in the measured compressor of number of times or described at least one sensor with a counting device recording compressed machine; With with a comparator, with the restarting number of times or unusual number of times occurs of record with pre-determined number compares, when write down restart number of times or unusual number of times occurs greater than described pre-determined number the time, described system quits work.
9. as claim 6 or 8 described control methods, it is characterized in that described checkout gear comprises at least one sensor, be positioned at outlet, import department, described condenser and/or the described evaporimeter of described compressor, be used to detect its temperature, pressure, and/or described compressor operating electric current.
10. control method as claimed in claim 9, it is characterized in that, described control method comprises step, described electromagnetic expanding valve has the increment with the corresponding aperture of described each sensor, described increment is identical and/or different, when described checkout gear detects described compressor and operation irregularity occurs by one in described at least one sensor, send error signal, the aperture of the opening ratio last time startup of described electromagnetic expanding valve when described compressor starts once more increases by one and the corresponding increment of this sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2005100025264A CN100406820C (en) | 2005-01-20 | 2005-01-20 | Refrigeration circulating system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2005100025264A CN100406820C (en) | 2005-01-20 | 2005-01-20 | Refrigeration circulating system and control method thereof |
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| CN1808023A true CN1808023A (en) | 2006-07-26 |
| CN100406820C CN100406820C (en) | 2008-07-30 |
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| CN102494445A (en) * | 2011-12-12 | 2012-06-13 | 龚文浩 | Start method for quickly discharging pressure of compressor of refrigeration system |
| CN104422061A (en) * | 2013-08-21 | 2015-03-18 | 广东美的制冷设备有限公司 | Air conditioner and quick start method thereof |
| CN104662381A (en) * | 2012-08-23 | 2015-05-27 | 丹佛斯公司 | A method for controlling a vapour compression system during start-up |
| CN105757908A (en) * | 2016-04-08 | 2016-07-13 | 广东美的制冷设备有限公司 | Air conditioner control method and device |
| CN108507246A (en) * | 2018-03-30 | 2018-09-07 | 北京新能源汽车股份有限公司 | Control method and device of heat pump air conditioning system and electronic equipment |
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| JPH0745979B2 (en) * | 1987-09-28 | 1995-05-17 | 松下電器産業株式会社 | Refrigeration cycle controller |
| JP3094997B2 (en) * | 1998-09-30 | 2000-10-03 | ダイキン工業株式会社 | Refrigeration equipment |
| KR100459200B1 (en) * | 2002-12-13 | 2004-12-03 | 엘지전자 주식회사 | Method for Controlling Operation of The Inverter Air Conditioner |
| CN1216260C (en) * | 2003-07-10 | 2005-08-24 | 上海交通大学 | Car air-conditioner evaporator refrigerating agent flow control system |
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| US9791174B2 (en) | 2012-08-23 | 2017-10-17 | Danfoss A/S | Method for controlling an expansion device of a vapor compression system during start-up using rates of change of an evaporator inlet and outlet temperature |
| CN104662381A (en) * | 2012-08-23 | 2015-05-27 | 丹佛斯公司 | A method for controlling a vapour compression system during start-up |
| CN104662381B (en) * | 2012-08-23 | 2016-11-02 | 丹佛斯公司 | For the method controlling vapor compression system in start-up course |
| CN104422061A (en) * | 2013-08-21 | 2015-03-18 | 广东美的制冷设备有限公司 | Air conditioner and quick start method thereof |
| CN104422061B (en) * | 2013-08-21 | 2017-05-10 | 广东美的制冷设备有限公司 | Air conditioner and quick start method thereof |
| CN105757908A (en) * | 2016-04-08 | 2016-07-13 | 广东美的制冷设备有限公司 | Air conditioner control method and device |
| CN105757908B (en) * | 2016-04-08 | 2018-09-04 | 广东美的制冷设备有限公司 | Air-conditioner control method and device |
| CN108507246A (en) * | 2018-03-30 | 2018-09-07 | 北京新能源汽车股份有限公司 | Control method and device of heat pump air conditioning system and electronic equipment |
| CN109442699A (en) * | 2018-11-06 | 2019-03-08 | 宁波奥克斯电气股份有限公司 | The control method of machine valve in a kind of multi-online air-conditioning system |
| WO2020094009A1 (en) * | 2018-11-06 | 2020-05-14 | 宁波奥克斯电气股份有限公司 | Control method for indoor unit valve of multi-split air-conditioning system |
| CN112665105A (en) * | 2020-12-22 | 2021-04-16 | 珠海格力电器股份有限公司 | Air conditioner operation control method, control device, air conditioner and storage medium |
| CN114646156A (en) * | 2022-03-16 | 2022-06-21 | 青岛海尔空调器有限总公司 | Control method, control device, equipment and medium for electronic expansion valve of air conditioner |
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