CN1233971C - Air-conditioning plant and defrosting operation method - Google Patents
Air-conditioning plant and defrosting operation method Download PDFInfo
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- CN1233971C CN1233971C CNB031072941A CN03107294A CN1233971C CN 1233971 C CN1233971 C CN 1233971C CN B031072941 A CNB031072941 A CN B031072941A CN 03107294 A CN03107294 A CN 03107294A CN 1233971 C CN1233971 C CN 1233971C
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/024—Compressor control by controlling the electric parameters, e.g. current or voltage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/15—Power, e.g. by voltage or current
- F25B2700/151—Power, e.g. by voltage or current of the compressor motor
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- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Provided is an air conditioner that is provided with a constant-speed compressor to make defrosting operation and its defrosting operation can be released correspondingly to a wide power supply voltage range without defraying expenses for a temperature sensor, etc., by releasing the defrosting operation based on a defrosting operation releasing reference current value found from an operational expression by detecting the current value of the compressor during the defrosting operation. The smallest current value Ik of the compressor is found by monitoring the current value I of the compressor during the defrosting operation and the defrosting operation releasing reference current value Id is found by performing arithmetic operation by using the current value Ik and a constant preset in an indoor controller. The found reference current value Id is stored in a controller and the controller is caused to discriminate whether or not the current value I of the compressor exceeds the reference current value Id and, when the value I exceeds the value Id, to release the defrosting operation. Consequently, the occurrence of insufficient or excessive defrosting operation can be prevented and this air conditioner can cope with a wide power supply voltage range and the fluctuation of the power supply voltage, because the current value I of the compressor and the defrosting operation releasing reference current value Id fluctuate in accordance with the fluctuation of the power supply voltage.
Description
Technical field
The present invention relates to have constant speed type compressor, carry out the release method of the Defrost operation in the aircondition of Defrost operation by kind of refrigeration cycle.
Background technology
Be equipped with the comprising in overseas aircondition of constant speed type compressor, remove the means of Defrost operation and using following method.That is: first method is provided with the timer that carries out timing to as the certain hour of Defrost operation time in aircondition, carries out the releasing (stopping) of Defrost operation in the stage of intact Defrost operation time of stipulating of this timer timing; Second method, in indoor set, equip indoor temperature transmitter, indoor heat converter temperature sensor and indoor controller, and equipped chamber's outer heat-exchanger temperature sensor and outdoor controller in off-premises station, judge whether to remove Defrost operation according to indoor temperature transmitter, indoor heat converter temperature sensor and the detected temperature value of outdoor heat converter temperature sensor, remove; And the third method, carry out the releasing of Defrost operation according to the releasing current value (driving current value of compressor) of the detected indoor temperature value of indoor temperature transmitter, the detected indoor heat converter temperature value of indoor heat converter temperature sensor and predefined Defrost operation.
But, in detecting the second method of carrying out the Defrost operation releasing from the temperature of each sensor, though can carry out Defrost operation accurately, but the outdoor heat converter temperature sensor need be set in off-premises station, perhaps be provided for handling the outdoor control device of its temperature information, spend cost.In addition, removing according to predefined current value in the third method of Defrost operation, can save outdoor control device and outdoor temperature sensor in the off-premises station, be favourable on cost, but offering the power of compressor voltage change or having a mind to change under the situation of supply voltage, the current value in the Defrost operation (driving current value of compressor) also can change.Driving current value was the predefined desired value that is used to remove Defrost operation originally, be set to and the change of supply voltage or the irrelevant fixed value of kind of compressor, so have following problems: can have residual frost or carry out Defrost operation owing to the change of this driving current value self.
The present invention proposes in view of this situation, its purpose is to provide a kind of Defrost operation release method and aircondition, even under different situation such as the ability of compressor, manufacturer, machine, perhaps offering under the different situation of power of compressor voltage, also can be provided for the correct reference current value that Defrost operation is removed all the time.
Summary of the invention
To achieve these goals, according to first mode of the present invention, a kind of aircondition has compressor, can carry out Defrost operation, it is characterized in that, comprising: detection part, the running current value of the above-mentioned compressor in the detection Defrost operation; And control assembly, ask the reference current value of the benchmark of removing as Defrost operation according to the detected running current value of this detection part, relatively obtain the running current and the said reference current value of the detected above-mentioned compressor of above-mentioned detection part behind the said reference current value, remove Defrost operation according to its comparative result.Above-mentioned control assembly has the memory of the parameter of store predetermined in advance, according to the above-mentioned parameter of storing in the above-mentioned running current value of the above-mentioned compressor in the Defrost operation and the above-mentioned memory, asks the said reference current value with the arithmetic expression of regulation.
In above-mentioned aircondition, it is characterized in that under the situation more than the said reference current value, above-mentioned control assembly is removed Defrost operation in above-mentioned running current value.
In above-mentioned aircondition, it is characterized in that, prepare in advance and be used for the available many group parameters of above-mentioned arithmetic expression that Defrost operation is removed, store in the above-mentioned memory, from above-mentioned many group parameters, suitably select one group of suitable parameter, calculate above-mentioned arithmetic expression, the reference current value of asking the designing requirement environment with above-mentioned aircondition to match most.
In above-mentioned aircondition, it is characterized in that above-mentioned control assembly is asked the said reference current value according to the minimum current value and the above-mentioned parameter of above-mentioned running current in official hour of above-mentioned compressor.
In above-mentioned aircondition, it is characterized in that establishing Id is the said reference current value, F and K are the above-mentioned parameter value, Ik is the minimum current value of above-mentioned running current in official hour of above-mentioned compressor, then the arithmetic expression of afore mentioned rules by
Id=Ik+ (F-Ik) * K represents.
According to second mode of the present invention, the method that a kind of Defrost operation is removed is used to have the aircondition of compressor, it is characterized in that, comprises following process: the running current that detects the above-mentioned compressor in the Defrost operation; Ask the reference current value of the releasing that is used for above-mentioned Defrost operation according to the above-mentioned running current of detected above-mentioned compressor in this testing process and one group of parameter value; The above-mentioned running current value of detected above-mentioned compressor judges whether remove Defrost operation after comparing the said reference current value and obtaining the said reference current value.
In said method, it is characterized in that also having the releasing step: in above-mentioned deterministic process, obtain behind the said reference current value the above-mentioned running current value of detected above-mentioned compressor and under the situation more than the said reference current value, remove above-mentioned Defrost operation.
In said method, it is characterized in that, be above-mentioned one group of parameter value, Ik when being minimum current value in official hour of the above-mentioned running current value of above-mentioned compressor establishing F and K, said reference current value I d by
The arithmetic expression that Id=Ik+ (F-Ik) * K represents is obtained.
Description of drawings
Fig. 1 is the refrigerant circuit of aircondition and the schematic diagram of control circuit.
Fig. 2 is the flow chart of an embodiment of Defrost operation releasing of the present invention.
Fig. 3 is the time variation diagram of the running current I of the compressor 10 in the Defrost operation.
Fig. 4 is the curve map of difference of the running current value of the reference current value removed of the variation of supply voltage causes in the flow chart of Fig. 2 Defrost operation and compressor.
The specific embodiment
Below, with reference to Fig. 1～3 an embodiment of the present invention is described.Fig. 1 is not provided with the schematic diagram that outdoor heat converter temperature sensor and outdoor control circuit carry out the aircondition of Defrost operation in off-premises station.At first, in off-premises station 1, comprise: compressor 10, compression refrigerant; Outdoor heat converter 11 carries out heat exchange with outer gas, when refrigerating operaton, to the atmosphere heat release, and when heating operation, absorbs heat from atmosphere; Cross valve 13 makes the loop direction counter-rotating of refrigerant; Expansion valve 14; Reservoir 15; Service valve 16a and 16b connect from indoor set and extend pipe arrangement between next machine; Each machine is connected by coolant piping.In addition, in above-mentioned off-premises station 1, be built-in with: outdoor draft fan 12, to above-mentioned outdoor heat converter 11 air-supplies; And terminal board 17, connect from distribution between the machine of indoor set extension.
On the other hand, comprise in indoor set 2: indoor heat converter 20 is used for carrying out heat exchange with room air; Indoor blower 21 is to this indoor heat converter air-supply; Temperature sensor 22 detects indoor temperature; And Indoor Control Device 23, carry out the control of this aircondition integral body; And in this Indoor Control Device 23, be built-in with: power relay 24, carry out the operation of compressor 10/stop; And current sensor 25, the operation driving current value of detection compressor 10.Moreover be connected with on the Indoor Control Device 23 of above-mentioned indoor set 2: acceptance division 26 receives from the wireless remote control that carries out the various indications relevant with the operation work of this aircondition (below, be called remote control) 28 operation informations that send (signal); And plug 27, be used to accept the supply of power supply.
In above-mentioned off-premises station 1, be connected on service valve 16a and the 16b from pipe arrangement 3 between 2 machines of above-mentioned indoor set 2 extensions, same, be connected on the terminal board 17 from distribution 4 between 5 machines of above-mentioned indoor set 2 extensions.Here, between machine between the number of pipe arrangement 3 and machine the number of distribution 4 be not necessarily limited to above-mentioned value.
Here, flowing of refrigerant in the refrigerant circuit shown in Figure 1 is described.
Usually, when the heating operation of aircondition, carry out the following operation that heats circulation: at first, cross valve 13 switches to the heating operation side that circulates, the refrigerant that compressor 10 compressed passes through cross valve 13 shown in dotted arrow, via service valve 16a, and pipe arrangement 3a between machine, by the indoor heat converter 20 of indoor set 2 accept indoor blower 21 air-supply and after the heat release, return above-mentioned indoor set 1 via pipe arrangement 3b between machine and service valve 16b, by expansion valve 14, accept the air-supply of outdoor draft fan 12 and absorb heat by outdoor heat converter 11, via above-mentioned cross valve 13, with reservoir 15, be sent to above-mentioned compressor 10.
On the other hand, when refrigerating operaton, carry out the operation of following kind of refrigeration cycle: at first, cross valve 13 switches to the refrigerating operaton side that circulates, the refrigerant that compressor 10 compressed passes through cross valve 13 shown in the solid line arrow, be sent to outdoor heat converter 11, accept the air-supply of outdoor draft fan 12 and heat release, by expansion valve 14, by pipe arrangement 3b between service valve 16b and machine, be sent to the indoor heat converter 20 of indoor set 2, here, absorb heat by the air-supply of indoor blower 21, by pipe arrangement 3a between machine and service valve 16a, return off-premises station 1,, be sent to above-mentioned compressor 10 via above-mentioned cross valve 13 and reservoir 15.
When Defrost operation, the operation of same kind of refrigeration cycle when carrying out with this refrigerating operaton, but outdoor draft fan 12 and indoor blower 21 are the air-supply operation of calm or weak wind.
Following the carrying out of common operation work of aircondition: at first, plug 27 is connected in the supply socket, accept the supply of power supply, select a certain operational mode in refrigerating operaton or the heating operation with above-mentioned remote control 28, indoor desired temperature is set at the design temperature of above-mentioned remote control 28, sends operation beginning index signal by above-mentioned run switch.After above-mentioned acceptance division 26 receives operation beginning index signal, the operational mode that Indoor Control Device 23 receives according to above-mentioned acceptance division 26, if operational mode is a refrigerating operaton, then the cross valve 13 of above-mentioned off-premises station 1 is switched to the refrigerating operaton side that circulates, and if heating operation, then cross valve 13 is switched to the heating operation side that circulates, and connect indoor blower 21, calculate the design temperature of the above-mentioned remote control 28 that above-mentioned acceptance division 26 receives, temperature difference with indoor temperature transmitter 22 detected temperature, connect outdoor draft fan 12 according to this temperature difference, with power relay 24, carry out operation of air conditioner.
Now, suppose that above-mentioned aircondition selected heating operation and be in the heating operation.At this moment, carry out at needs under the situation of Defrost operation, above-mentioned cross valve is switched to the refrigerating operaton side that circulates, the circulation of refrigerant is reversed carry out Defrost operation as above-mentioned kind of refrigeration cycle.Here, be meant that in kind of refrigeration cycle, the refrigerant of the HTHP that will spue from compressor supplies to outdoor heat converter, but the heat of the high temperature refrigerant by this moment is carried out the defrosting of outdoor heat converter as the Defrost operation of kind of refrigeration cycle.
In Defrost operation, by defrosting cancel system described later be judged as should remove Defrost operation after, remove (stopping) Defrost operation, cross valve 13 is switched to the heating operation side that circulates, connect common heating operation.
Flow chart with reference to Fig. 2 illustrates the determination methods that Defrost operation of the present invention is removed.Following situation wherein is described: under the situation of carrying out Defrost operation, temporarily stop the operation (cutting off the electricity supply) of compressor, behind the switch operating that carries out cross valve 13, restart the operation (connection power supply) of compressor.
After the operation that stops compressor, cross valve 13 is switched to the refrigerating operaton side (S1) that circulates, be kind of refrigeration cycle with the refrigerant cycle sets.And then the operation (S2) of the compressor 10 of beginning off-premises station 1 starts timer a (S3).This timer a is in order computing described later to be carried out timing attack time or the time of Defrost operation carried out timing and to be installed to timer in the Indoor Control Device.
When Defrost operation begins, the running current value instability of the compressor 10 of the machine that has, so ignore it, for this reason, the shielding time t1 (for example 3 seconds) of the current value detection of compressor 10 is set, detect above-mentioned timer a and whether passed through shielding time t1 (S4), if do not pass through, then repeating this effluxion confirms, if and passed through, then the current value I of compressor 10 that at first will this moment detects and to be initial current value Is, is saved in the 1st memory in the above-mentioned Indoor Control Device 23 (S5).
Then, at regular intervals (perhaps continuously) detect the current value I (S6) of above-mentioned compressor 10, the initial current value Is that preserves in more above-mentioned the 1st memory, current value I (S7) with detected compressor 10, if above-mentioned current value I is lower than initial current value Is, then with it as operation current value Ik, be saved in the 2nd memory in the above-mentioned Indoor Control Device 23 (S8), and it is identical with above-mentioned initial current value Is or than it under the big situation in above-mentioned current value I, initial current value Is as operation current value Ik, is saved in above-mentioned the 2nd memory (S9).
Then, confirm whether above-mentioned timer a has passed through stipulated time t2 (for example 1 minute) (S10).If timer a does not pass through stipulated time t2, then proceed to step 130, continue to detect the running current value I of compressor 10.And then, the operation current value Ik (S140) that preserves in more detected current value I and above-mentioned the 2nd memory, be lower than operation current value Ik if detect current value I, then will detect the current value I new work is that operation current value Ik is saved in above-mentioned the 2nd memory (S150).On the other hand, detected current value I equal or situation greater than operation current value Ik under, current operation current value Ik intactly is saved in above-mentioned the 2nd memory (S160).After, turn back to step S10 and judge whether timer a passes through stipulated time t2.Carry out the processing of above-mentioned steps S10 to S160, until the timing process stipulated time t2 of timer a in step S10.
If detect above-mentioned timer a, then with the constant F and the K of storage calculate (Id=Ik+ (F-Ik) * K) (S11) in advance in the Indoor Control Device 23 in operation current value Ik that preserves in the 2nd memory this moment and the indoor set 2 through stipulated time t2.With the reference current value Id that its result removes as Defrost operation, be saved in the 3rd memory in the above-mentioned Indoor Control Device 23 (S12).
Here, to the minimum of the running current value I of t2 constantly, constant F and K are the numerical value that is predetermined by the manufacturer of the ability of the compressor that uses, compressor or machine or supply voltage value to Ik corresponding to moment t1.That is, the defrosting amount of Defrost operation (the elimination speed of frost etc.) changes according to the ability of the compressor that uses, the machine or the supply voltage value of compressor.Above-mentioned constant F and K are ability, machine or the supply voltage values according to compressor and wait the numerical value of decision in advance by experiment, provide and judge the completed suitable a reference value of defrosting.Therefore,, calculate above-mentioned arithmetic expression, can determine (consider with corresponding drive current of each condition and the relation between the defrosting) suitable a reference value that machine, ability and/or supply voltage value with compressor is corresponding by selecting suitable constant F, K.Promptly, the increase mode of the running current I of compressor changes according to the ability of the compressor that uses, the machine or the supply voltage value of compressor, asked so should change by experiment in advance as F, K, under the operation conditions of reality, the minimum (Ik) of the running current value I of (t2-t1) and constant value F, the K that suitably selects in time can obtain a reference value that is fit to each compressor according to the rules.Therefore, a reference value difference of each compressor (perhaps different supply voltage values etc.) that ability or machine are different provides the timing of defrosting releasing according to the expectation completed defrosting time of defrosting (running current value).
Prepare many group constant F, K in other memories beyond above-mentioned the 1st to the 3rd memory in the Indoor Control Device 23 of above-mentioned indoor set 2, when for example producing etc., from this numerical value, select, set one group of suitable numerical value respectively in advance in manufacturer.
In step S12, ask reference current value Id, after being saved in the 3rd memory, also detect the running current value I (S13) of the compressor 10 in the Defrost operation, judge whether it surpasses the above-mentioned reference current value Id (S14) that obtains, if the running current value I of compressor 10 is low, then still proceed Defrost operation, turn back to step 13, detect the running current value I of compressor 10 once more, repeat comparison (S14) with said reference current value I d.If the running current value I height of compressor 10, then remove the said reference current value I d, the above-mentioned initial current value Is that preserve in the 1st to the 3rd memory in the above-mentioned Indoor Control Device 23 and above-mentioned operation current value Ik (S15～S17), with timer a reset (S18), remove Defrost operation, turn back to common heating operation.
Here; The calculating of the reference current value Id that the Defrost operation that carries out according to the arithmetic expression in (S11) of the flow chart of above-mentioned Fig. 2 is removed is described with example; Suppose that the constant F and the K that select in pre-prepd a plurality of numerical value are respectively F=4.78, K=0.591 from Indoor Control Device 23; Be rated voltage Va[volt at supply voltage for example then] time; Suppose according to the flow chart of above-mentioned Fig. 2 and the operation current value Ik that finally is saved in above-mentioned the 2nd memory is the 3.0[ampere]=Ia; Then according to the arithmetic expression S11 of the flow chart of above-mentioned Fig. 2
Id＝Ia+(F-Ia)×K
＝3.0+(4.78-3.0)×0.591
4.05 ... (1), and the reference current value Id that the Defrost operation of this moment is removed is the 4.05[ampere]=Ida.Then, surpass the moment ta of this reference current value Ida, remove Defrost operation in the current value I of compressor 10.
Relative therewith, for example be lower than rated voltage Vb[volt at supply voltage] situation under, the voltage that is applied on the compressor 10 is also low, thus according to the flow chart of above-mentioned Fig. 2 and the operation current value Ik that finally is saved in above-mentioned the 2nd memory also reduce, be assumed to be the 2.5[ampere]=Ib, then
Id＝Ib+(F-Ib)×K
＝2.5+(4.78-2.5)×0.591
3.85 ... (2), and the reference current value Id that the Defrost operation of this moment is removed is the 3.85[ampere]=Idb.Then, surpass the moment tb of this reference current value Idb, remove Defrost operation in the current value I of compressor 10.
In addition, in contrast, be the Vc[volt higher for example than rated voltage V at supply voltage] situation under, the voltage that is applied on the compressor 10 is also high, so according to the flow chart of above-mentioned Fig. 2 and the operation current value Ik that finally is saved in above-mentioned the 2nd memory also increase, be assumed to be the 4.0[ampere]=Ic, then
Id＝Ic+(F-Ic)×K
＝4.0+(4.78-4.0)×0.591
4.46 ... (3), and the reference current value Id that the Defrost operation of this moment is removed is the 4.46[ampere]=Idc.Then, surpass the moment tc of this reference current value Idc, remove Defrost operation in the current value I of compressor 10.
Fig. 3 is the time variation diagram of the running current I of the compressor 10 in the Defrost operation.In order to carry out Defrost operation, need temporarily stop the operation of compressor, the circulation of counter-rotating refrigerant.Therefore, in the incipient stage of Defrost operation, the running current value I of compressor can regard zero as.Along with counter-rotating circulation (Defrost operation) is advanced, the defrosting amount increases slowly, so the running current value I of compressor also increases thereupon.As previously mentioned, when Defrost operation began, running current value I instability was not so carry out the judgment processing that Defrost operation is removed in shielding time t1 (for example 3 seconds).
As shown in Figure 3, the running current value I of t1 is equivalent to initial current value Is constantly, and Is is stored in the 1st memory.After moment t1, repeat comparison running current value I and initial current value Is, t2 (for example 60 seconds) minimum running current value (operation current value) Ik before is stored in the 2nd memory constantly.Behind moment t2, ask reference current value Id according to the operation current value Ik that stores in the 2nd memory and predefined constant F, K, store in the 3rd memory.After, continue to detect the running current value I of compressor 10, compare with the reference current value Id that preserves in the 3rd memory, detecting that running current value I equals or, be judged as and should remove Defrost operation greater than stage of reference current value.In this stage, counter-rotating operation circulation turns back to common work (being heating operation here).
Fig. 4 illustrates the variation (Va along with supply voltage V, Vb, Vc), finally be saved in the operation current value Ik (longitudinal axis) in above-mentioned the 2nd memory, relation with the Defrost operation time t (transverse axis) of this compressor, according to above-mentioned supply voltage Va～Vc, with finally be saved in reference current value Ida～Idc that Defrost operation that the operation current value Ia～Ic in above-mentioned the 2nd memory obtains with the arithmetic expression of the flow chart (S11) of Fig. 2 removes respectively as shown in Figure 4 in the Defrost operation, under the situation that supply voltage V has changed along ascent direction, said reference current value I d also is high value, the releasing of Defrost operation can be not too early, the Defrost operation that can not have residual frost, on the contrary, under the situation that supply voltage V has changed along descent direction, said reference current value I d also is a low value, the releasing of Defrost operation can be not slow excessively, can prevent Defrost operation.
Wherein, in the above-described embodiment, utilize the minimum (Ik) of the running current in the official hour zone (t2-t1) to ask reference current value (Id), but also can ask reference current value, but preferably ask reference current value according to minimum with statistical values such as the flex point of minimum, maximum or mean values.In the case, certainly constant F, K also for because of the different value of each situation.
In addition, in the above-described embodiment, constant (parameter) is these 2 of F, K, but the number of constant value is not limited to 2, also can be more than 3.By the number of such increase constant, can obtain more reliable reference current value.Wherein, the compressor of above-mentioned present embodiment preferably uses constant speed type compressor.
The effect of invention
As mentioned above, according to the present invention, detect the current value of the compressor in the Defrost operation, according to this inspection The reference current value that the current value of measuring asks Defrost operation to remove, after obtaining the said reference current value, Detect the drive current of compressor, in the situation of this driving current value greater than the said reference current value, separate Except Defrost operation, thus the releasing that can not have residual frost and cross the suitable Defrost operation of Defrost operation.
In addition, do not use indoor temperature transmitter, indoor heat converter temperature sensor or outdoor heat to hand over The parallel operation temperature sensor, and need not measure supply voltage, can carry out and very wide supply voltage scope The releasing of corresponding Defrost operation.
Claims (8)
1, a kind of aircondition has compressor, can carry out Defrost operation, it is characterized in that, comprising:
Detection part, the running current value of the above-mentioned compressor in the detection Defrost operation; And
Control assembly, ask the reference current value of the benchmark of removing as Defrost operation according to the detected running current value of this detection part, obtain the running current and the said reference current value of the detected above-mentioned compressor of more above-mentioned detection part behind the said reference current value, remove Defrost operation according to its comparative result
Above-mentioned control assembly has the memory of the parameter of store predetermined in advance, according to the above-mentioned parameter of storing in the above-mentioned running current value of the above-mentioned compressor in the Defrost operation and the above-mentioned memory, asks the said reference current value with the arithmetic expression of regulation.
2, aircondition as claimed in claim 1 is characterized in that, under the situation more than the said reference current value, above-mentioned control assembly is removed Defrost operation in above-mentioned running current value.
3, aircondition as claimed in claim 2, it is characterized in that, prepare in advance and be used for the available many group parameters of above-mentioned arithmetic expression that Defrost operation is removed, store in the above-mentioned memory, from above-mentioned many group parameters, suitably select one group of suitable parameter, calculate above-mentioned arithmetic expression, the reference current value of asking the designing requirement environment with above-mentioned aircondition to match most.
4, aircondition as claimed in claim 2 is characterized in that, above-mentioned control assembly is asked the said reference current value according to the minimum current value and the above-mentioned parameter of above-mentioned running current in official hour of above-mentioned compressor.
5, aircondition as claimed in claim 3 is characterized in that, establishing Id is the said reference current value, and F and K are the above-mentioned parameter value, and Ik is the minimum current value of above-mentioned running current value in official hour of above-mentioned compressor, then the arithmetic expression of afore mentioned rules by
Id=Ik+ (F-Ik) * K represents.
6, the method removed of a kind of Defrost operation is used to have the aircondition of compressor, it is characterized in that, comprises following process:
Detect the running current of the above-mentioned compressor in the Defrost operation;
Ask the reference current value of the releasing that is used for above-mentioned Defrost operation according to the above-mentioned running current of detected above-mentioned compressor in this testing process and one group of parameter value;
The above-mentioned running current value of detected above-mentioned compressor judges whether remove Defrost operation after comparing the said reference current value and obtaining the said reference current value.
7, Defrost operation release method as claimed in claim 6, it is characterized in that also having the releasing step: in above-mentioned deterministic process, obtain behind the said reference current value the above-mentioned running current value of detected above-mentioned compressor and under the situation more than the said reference current value, remove above-mentioned Defrost operation.
8, as claim 6 or 7 described Defrost operation release methods, it is characterized in that, is above-mentioned one group of parameter value, Ik when being minimum current value in official hour of the above-mentioned running current value of above-mentioned compressor establishing F and K, said reference current value I d according to by
The arithmetic expression that Id=Ik+ (F-Ik) * K represents is obtained.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP184572/02 | 2002-06-25 | ||
| JP2002184572A JP4155765B2 (en) | 2001-06-29 | 2002-06-25 | Air conditioning apparatus and defrosting operation canceling method thereof |
| JP184572/2002 | 2002-06-25 |
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| Publication Number | Publication Date |
|---|---|
| CN1467463A CN1467463A (en) | 2004-01-14 |
| CN1233971C true CN1233971C (en) | 2005-12-28 |
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| CNB031072941A Expired - Fee Related CN1233971C (en) | 2002-06-25 | 2003-03-21 | Air-conditioning plant and defrosting operation method |
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| KR (1) | KR100530552B1 (en) |
| CN (1) | CN1233971C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101430154B (en) * | 2008-11-11 | 2010-06-09 | 深圳市协诚机电设备工程有限公司 | Inverse defrosting method for air supply heat pump |
| CN101988839B (en) * | 2009-08-04 | 2012-09-19 | 珠海格力电器股份有限公司 | Rime ice detection device, heat-pump air-conditioner and defrosting control method thereof |
| CN102759239B (en) * | 2012-07-18 | 2015-02-18 | 广东志高空调有限公司 | Defrosting method combining temperature change with current value change for air conditioner and controller thereof |
| CN104913452B (en) * | 2015-06-03 | 2017-11-10 | 广东美的制冷设备有限公司 | Air conditioner and its defrosting control method |
| CN110425792B (en) * | 2019-08-05 | 2021-09-24 | 合肥华凌股份有限公司 | Defrosting control method of refrigerator, storage medium and refrigerator |
| CN113124544B (en) * | 2021-04-20 | 2023-04-25 | 青岛海尔空调电子有限公司 | Air conditioning unit and defrosting control method thereof |
-
2003
- 2003-03-21 CN CNB031072941A patent/CN1233971C/en not_active Expired - Fee Related
- 2003-06-24 KR KR10-2003-0040957A patent/KR100530552B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR20040002652A (en) | 2004-01-07 |
| KR100530552B1 (en) | 2005-11-23 |
| CN1467463A (en) | 2004-01-14 |
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