CN1184443C - Air conditioning device - Google Patents

Abstract

An air conditioner is provided to perform cancellation of defrosting operation corresponding to a wide power voltage range without a temperature sensor by detecting a current value of a compressor in the process of defrosting and by canceling defrosting operation by a reference current value of defrosting operation cancellation. An air conditioner, having a compressor and a defrosting function, comprises a unit for detecting a current value applied to the compressor under defrosting operation, and for calculating a reference current value(Id) for cancellation of the defrosting operation on the basis of the current value of the compressor detected, and a unit for detecting a driving current value of the compressor and canceling defrosting operation if the driving current value is greater than the reference current value.

Description

Conditioner

Technical field

The present invention relates to have the constant velocity type compressor, and utilize the defrost release method of the defrosting running in the conditioner of running of circulating cold air.

Background technology

Up to now, carrying the constant velocity type compressor face in overseas conditioner, the timer that certain hour is set is as the defrosting duration of runs in conditioner, remove the defrosting running according to this timer, or by equipped chamber's inner controller and outdoor control device in each indoor equipment and outdoor equipment, detect indoor temperature transmitter, the indoor heat converter temperature sensor, each temperature of outdoor control device and outdoor heat converter temperature sensor, remove the defrosting running, or use indoor temperature transmitter, the releasing current value of each temperature of indoor heat converter temperature sensor and predefined defrosting running is removed the defrosting running.

Summary of the invention

; in the method for the temperature derating defrosting running that detects each sensor; need in the outdoor equipment that carries out certain defrosting running, the outdoor heat converter temperature sensor be set, and be provided for handling the outdoor control device of this temperature information, thereby improve cost.And, though in the control of carrying out with predefined current value, can save outdoor control device and outdoor temperature sensor in the outdoor equipment, to reducing cost is favourable, but when mains voltage variations, electric current in the defrosting running also changes, thereby causes the not enough or excessively defrosting running of defrosting.

For this reason, the invention provides a kind of conditioner, comprising: outdoor equipment with constant velocity type compressor, outdoor heat converter, cross valve, expansion valve and outdoor draft fan; And have indoor heat converter and indoor blower, and connect the indoor equipment of above-mentioned outdoor equipment by the equipment room pipe arrangement; And be provided with the Indoor Control Device that makes this indoor equipment can defrost and turn round,

It is characterized in that:

Above-mentioned Indoor Control Device comprises: detect the current value of the compressor in the defrosting running, and according to this detected current value and in advance the computing formula of the constant of storage obtain device as the reference current value of removing the benchmark that defrosting turns round; With behind the reference current value of obtaining above-mentioned releasing defrosting running, detect the drive current of compressor, when this driving current value is bigger than the reference current value of above-mentioned releasing defrosting running, just remove the device of defrosting running; And it constitutes: prepared a plurality of constants that use in the aforementioned calculation formula, and can select any one constant wherein in a plurality of constants of being prepared.

Feature of the present invention is that it has the current value that detects the compressor in the defrosting running, hope for success by computing formula according to this detected current value and to be the reference current value of the benchmark of removing the defrosting running, after this detect the revolution electric current value of compressor, judge whether this revolution electric current value surpasses the said reference current value, then, if above-mentioned revolution electric current value surpasses the said reference current value, then remove the control device of defrosting running.

Feature of the present invention is that the current value of the compressor from detected defrosting running and the computing formula that is stored in the constant in the controller are in advance tried to achieve the reference current value of removing the defrosting running.

Feature of the present invention be ready to a plurality of in the computing formula of finding the solution the reference current value that removes the defrosting running, use be stored in constant in the above-mentioned controller, can select any one constant wherein.

We see from above explanation, detect the current value of the compressor in the defrosting running according to the present invention, find the solution the device of the reference current value of defrosting running according to this detected current value, after trying to achieve the said reference current value, detect the drive current of compressor, when this driving current value is bigger than said reference current value, remove the defrosting running, the suitable defrosting running not enough and excessively defrosting running that can not defrost is removed.

And, can carry out without indoor temperature transmitter and indoor heat converter temperature sensor or outdoor heat converter temperature sensor, and not measure supply voltage, the defrosting running corresponding with vast supply voltage scope removed.

Description of drawings

Fig. 1 is the cooling medium circuit of expression conditioner and the skeleton diagram of control circuit.

Fig. 2 is the program operation chart according to an example of releasing defrosting running of the present invention.

Fig. 3 is illustrated in the procedure operation of Fig. 2, the curve map of the difference of the reference current value of the releasing defrosting running that is caused by the variation of supply voltage and the revolution electric current value of compressor.

The specific embodiment

Below, we simultaneously illustrate an example of the present invention with reference to Fig. 1～Fig. 3 at one side.Fig. 1 is not provided with the defrost skeleton diagram of conditioner of running of outdoor heat converter temperature sensor and outdoor control device in outdoor equipment.At first, in outdoor equipment 1, have the compressor 10 of compression cooling medium, carry out the heat exchange with extraneous gas, during the cooling running to the atmosphere heat release, during the heating running from the outdoor heat converter 11 of atmosphere heat absorption, make the four-way threshold 13 of the loop direction counter-rotating of cooling medium, expansion valve 14, reservoir 15 and the operating valve 16a and the 16b that are connected with the equipment room pipe arrangement that stretches out from indoor equipment, each machine is coupled together by the cooling medium pipe arrangement.In addition, in above-mentioned outdoor equipment 1, the interior outdoor draft fan of adorning to above-mentioned outdoor heat converter 11 air-supplies 12 and the terminal plate 17 that is connected with the equipment room distribution that stretches out from indoor equipment.

On the other hand, in indoor equipment 2, have the indoor heat converter 20 that is used for carrying out heat exchange with room air, indoor blower 21 to this indoor heat converter air-supply, detect the temperature sensor 22 of indoor temperature and the Indoor Control Device 23 that this conditioner is all controlled, in this Indoor Control Device 23, interior dress makes compressor 10 runnings power relay 24 that stops and the current sensor 25 that detects this revolution electric current value.Further, the plug 27 that stops the receiver 26 of the operation information that the Digiplex (hereinafter referred to as remote controller) 28 of the operation that waits sends and be used to accept the power supply supply from the running of carrying out this conditioner is connected with the Indoor Control Device 23 of above-mentioned indoor equipment 2.

Then, above-mentioned outdoor equipment 1 makes 2 equipment room pipe arrangements 3 that come out from above-mentioned indoor equipment 2 stretching, extensions be connected with 16b with operating valve 16a, and is same, and 5 equipment room distributions 4 that come out from above-mentioned indoor equipment 2 stretching, extensions are connected with terminal plate 17.

At this, we illustrate flowing of cooling medium.Usually, when conditioner is warmed oneself running, at first, open cross valve 13, cooling medium by compressor 10 compressions, shown in dotted arrow, by cross valve 13, through operating valve 16a and equipment room pipe arrangement 3a, in the indoor heat converter 20 of indoor equipment 2, by accepting to carry out heat release, get back to above-mentioned outdoor equipment 1 through equipment room pipe arrangement 3b and operating valve 16b, by expansion valve 14 from the air-supply of indoor blower 21, in outdoor heat converter 11, absorb heat from the air-supply of outdoor draft fan 12 by accepting,, to send into the running in the heating circulation of above-mentioned compressor 10 through above-mentioned cross valve 13 and reservoir 15.

On the other hand, during the cooling running, at first, close cross valve 13, by the cooling medium of compressor 10 compressions, shown in the solid line arrow, through cross valve 13, deliver to outdoor heat converter 11, accept to carry out heat release from the air-supply of outdoor draft fan 12, through expansion valve 14, by operating valve 16b and equipment room pipe arrangement 3b, deliver to the indoor heat converter 20 of indoor equipment 2, there, by absorbing heat from the air-supply of indoor blower 21, by equipment room pipe arrangement 3a and operating valve 16a, get back to outdoor equipment 1, through above-mentioned cross valve 13 and reservoir 15, send into above-mentioned compressor 10, carry out the running in the cool cycles.

Then, when running defrosting, the running when carrying out in the identical cool cycles with this cooling running, but outdoor draft fan 12 and indoor blower 21 become the air-supply running of calm or weak wind.

And, control work is following to be carried out: at first, plug 27 is connected with supply socket, accepting power supply supplies with, select to cool off any operation mode that turns round or warm oneself in turning round with above-mentioned remote controller 28, set the design temperature of the indoor temperature of hope, send the information of entry into service by above-mentioned running switch as above-mentioned remote controller 28.In above-mentioned receiver 26, when receiving the information of running running, operation mode according to above-mentioned receiver 26 receptions, if operation mode is the cooling running, then Indoor Control Device 23 is closed the cross valve 13 of above-mentioned outdoor equipment 1, if heating running, then Indoor Control Device 23 is opened cross valve 13 and indoor blower 21 is opened, calculate that above-mentioned receiver 26 receives from the design temperature of above-mentioned remote controller 28 and by the temperature difference between the indoor temperature transmitter 22 detected temperature, according to this temperature difference, outdoor draft fan 12 and power relay 24 are connected, carried out operation of air conditioner.

Then, above-mentioned conditioner, elected when selecting warm operation mode and turning round, above-mentioned cross valve is closed, undertaken turning round, if detect the releasing of this defrosting running as the defrosting of above-mentioned cool cycles by the circulation counter-rotating that makes cooling medium, then remove the defrosting running, cross valve 13 is opened, and, proceed the heating running.

When detection method of removing with reference to the program operation chart of Fig. 2 explanation defrosting running according to the present invention when us and determination methods, begin the defrosting running and close cross valve 13 (S1), cooling medium is circulated as cool cycles, make compressor 10 runnings (S2) of outdoor equipment 1, make timer a work (S3).This timer a enrolls the timer that is used for calculating the Indoor Control Device that defrosts the duration of runs.

And, because during defrosting running beginning, machine according to compressor 10, it is unstable that this revolution electric current value becomes, so in order to ignore this instability, the masking period that current value to compressor 10 detects is set not, whether detect above-mentioned timer a through 3 seconds (S4), if not through 3 seconds, this effluxion of duplicate acknowledgment then is if passed through for 3 seconds, then at first, the current value I that detects compressor 10 is as initial current value Is, and it is kept in the 1st memory in the above-mentioned Indoor Control Device 23 (S5).

Secondly, detect the current value I (S6) of above-mentioned compressor 10, relatively be kept at the initial current value Is in above-mentioned the 1st memory and the current value I (S7) of detected compressor 10, if above-mentioned current value I is littler than initial current value Is, then with it as calculating current value I k, be kept in the 2nd memory in the above-mentioned Indoor Control Device 23 (S8), when above-mentioned current value I identical with above-mentioned initial current value Is, or when bigger than above-mentioned initial current value Is, initial current value Is as calculating current value I k, is kept in above-mentioned the 2nd memory (S9).

Then, confirm that whether above-mentioned timer a is through 1 minute (S10), if not through 1 minute, then get back to above-mentioned steps 6, repeat the later control of above-mentioned steps 6, if above-mentioned timer a passed through 1 minute, then in step 8 or step 9, calculate (S11) with the constant F and the K that are kept at the calculating current value I k in the 2nd memory and be stored in advance in the Indoor Control Device 23 in the indoor equipment 2, it as the reference current value Id that removes the defrosting running, is kept in the 3rd memory in the above-mentioned Indoor Control Device 23 (S12).At this, this constant F and K are the numerical value by the ability of the compressor of each use or each compressor manufacturing merchant decision, be ready to a plurality of such numerical value in other memory beyond above-mentioned the 1st to the 3rd memory in the Indoor Control Device 23 of above-mentioned indoor equipment 2, for example, when manufacturer produces etc., 1 group of numerical value from these numerical value, selecting respectively.

And, after this, also detect the current value I (S13) of the compressor 10 in this defrosting running, judge whether this current value I surpasses the above-mentioned reference current value Id (S14) that tries to achieve,, then continue intactly to defrost running if the current value I of compressor 10 is lower than reference current value Id, get back to step 13, once more, detect the current value I of compressor 10, repeat comparison with said reference current value I d.If the current value I of compressor 10 surpasses reference current value Id, then remove the said reference current value I d in the 1st to the 3rd memory that is kept in the above-mentioned Indoor Control Device 23, above-mentioned initial current value Is and aforementioned calculation current value I k (S15～S17), make timer a zero setting (S18), remove the defrosting running, get back to common heating running.

At this, we exemplify in the step of the procedure operation of above-mentioned Fig. 2 (S11) with the calculating of computing formula to the reference current value Id that removes the defrosting running, be respectively F=4.78 from the constant F and the K that Indoor Control Device 23, select in ready a plurality of numerical value in advance, during K=0.591, for example, when supply voltage is rated voltage Va (volt), when finally being kept at calculating current value I k in above-mentioned the 2nd memory and being 3.0 (peace)=Ia by the procedure operation of above-mentioned Fig. 2, computing formula S11 with the procedure operation of above-mentioned Fig. 2 calculates

$\mathrm{Id}=\mathrm{Ia}+(F-\mathrm{Ia})\×K$

$=3.0+(4.78-3.0)\×0.591$

$\≅4.05......\left(1\right)$

The reference current value Id of releasing defrosting running at this moment is 4.05 (peace)=Ida.Then, surpass the moment ta of this reference current value Ida, remove the defrosting running in the current value I of compressor 10.

Therewith relatively, for example, when supply voltage is the Vb (volt) lower than rated voltage, because the voltage that is added on the compressor 10 also reduces, so the calculating current value I K that finally is kept in above-mentioned the 2nd memory by the procedure operation of above-mentioned Fig. 2 also reduces, and when being 2.5 (peace)=Ib, calculates

$\mathrm{Id}=\mathrm{Ib}+(F-\mathrm{Ib})\×K$

$=2.5+(4.78-2.5)\×0.591$

$\≅3.85......\left(2\right)$

The reference current value Id of releasing defrosting running at this moment is 3.85 (peace)=Idb.Then, surpass the moment tb of this reference current value Idb, remove the defrosting running in the current value I of compressor 10.

And, in contrast, for example, when supply voltage is the Vc (volt) higher than rated voltage, because the voltage that is added on the compressor 10 also increases, so the calculating current value I k that finally is kept in above-mentioned the 2nd memory by the procedure operation of above-mentioned Fig. 2 decision also increases, and when being 4.0 (peace)=Ic, calculates

$\mathrm{Id}=\mathrm{Ic}+(F-\mathrm{Ic})\×K$

$=4.0+(4.78-4.0)\×0.591$

$\≅4.46......\left(3\right)$

The reference current value Id of releasing defrosting running at this moment is 4.46 (peace)=Idc.Then, surpass the moment tc of this reference current value Idc, remove the defrosting running in the current value I of compressor 10.

Get the longitudinal axis for finally being kept at calculating current value I k and the supply voltage V in above-mentioned the 2nd memory, get the defrosting duration of runs t of transverse axis for this compressor, from above-mentioned supply voltage Va～Vc and defrosting running, finally be kept at calculating current value I a～Ic in above-mentioned the 2nd memory, reference current value Ida～the Idc of the releasing defrosting running of trying to achieve with the computing formula of the step (S11) of the procedure operation of Fig. 2 becomes appearance shown in Figure 3 respectively, when supply voltage V when ascent direction changes, said reference current value I d also changes to high value, the defrosting running is removed prematurely, the defrosting running that can not defrost not enough, on the contrary, when supply voltage V when descent direction changes, said reference current value I d also changes to low value, the defrosting running is removed the day after the fair, can be prevented excessive defrosting.

Claims (1)

1. a conditioner comprises: the outdoor equipment with constant velocity type compressor, outdoor heat converter, cross valve, expansion valve and outdoor draft fan; And have indoor heat converter and indoor blower, and connect the indoor equipment of above-mentioned outdoor equipment by the equipment room pipe arrangement; And be provided with the Indoor Control Device that makes this indoor equipment can defrost and turn round,

It is characterized in that:

Above-mentioned Indoor Control Device comprises: detect the current value of the compressor in the defrosting running, and according to this detected current value and in advance the computing formula of the constant of storage obtain device as the reference current value of removing the benchmark that defrosting turns round; With the drive current that after the reference current value of having obtained above-mentioned releasing defrosting running, detects compressor, when this driving current value is bigger than the reference current value of above-mentioned releasing defrosting running, just remove the device that defrosting is turned round; And constitute: have a plurality of constants that in the aforementioned calculation formula, use, can in a plurality of constants that this has, select any one constant wherein.

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