CN105371545A - An air conditioner and a refrigerant circulation quantity adjusting method for a refrigeration system thereof - Google Patents
An air conditioner and a refrigerant circulation quantity adjusting method for a refrigeration system thereof Download PDFInfo
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Abstract
The invention relates to a refrigerant circulation quantity adjusting method for a refrigeration system of an air conditioner. A refrigeration system comprises a compressor, a reversing valve, an outdoor heat exchanger and an indoor heat exchanger which are connected through refrigeration pipelines. The refrigeration pipeline between the outdoor heat exchanger and the indoor heat exchanger is provided with a liquid storage device. One end of the liquid storage device is connected with the indoor heat exchanger via a first electronic expansion valve and the other end of the liquid storage device is connected with the outdoor heat exchanger via a second electronic expansion valve. The adjusting method comprises the steps of: in the refrigeration working condition, adjusting the opening degrees of the electronic expansion valves according to the difference between the outdoor environment temperature T11 and the outlet temperature T9 of the outdoor heat exchanger to optimize the heat exchange efficiency of the outdoor heat exchanger and the refrigeration efficiency of the air conditioner; in the heating working condition, adjusting the opening degrees of the electronic expansion valves according to the middle part temperature T8 of the indoor heat exchanger to guarantee both the comfort degree of outlet air and the efficiency.
Description
Technical field
The invention belongs to air-conditioning art field, specifically, relate to the refrigerant circulation amount adjustment method of a kind of air-conditioner and refrigeration system thereof.
Background technology
The filling quantity of air-conditioner refrigerating system cold-producing medium is very large on the impact of household air-conditioner, when running under varying environment temperature, different operating mode and different compressors frequency load, refrigerant amount required when air-conditioner reaches best energy efficiency state is not identical, such as, during high frequency high load capacity, the refrigerant amount needed is more, and during low frequency underload, the refrigerant amount of needs is less.But air-conditioner refrigerating system is as a closed system, certain when being filled in cold-producing medium wherein.The refrigerant charge of air-conditioner is generally determined with design conditions, and the operating condition of reality often off-design operating mode, like this, even if with the air-conditioner that design conditions determination Optimal refrigerant charge fills refrigeration system, also inevitably there is the charging amount problem that relatively increases or reduce because working conditions change produces, thus affect the Energy Efficiency Ratio of actual motion, cause the waste of energy.
Summary of the invention
The object of the present invention is to provide a kind of refrigerant circulation amount adjustment method of air-conditioner refrigerating system, according to the operating condition of air-conditioner, automatically regulate refrigeration system circulating mass of refrigerant, make the Energy Efficiency Ratio that air-conditioner can both reach best under any operating mode.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of refrigerant circulation amount adjustment method of air-conditioner refrigerating system, refrigeration system comprises the compressor, reversal valve, outdoor heat exchanger and the indoor heat exchanger that are connected by refrigeration pipe, refrigeration pipe between described outdoor heat exchanger and indoor heat exchanger is provided with reservoir, one end of described reservoir is connected with indoor heat exchanger by the first electric expansion valve, the other end of described reservoir is connected with outdoor heat exchanger by the second electric expansion valve, and described control method is:
Under cooling condition, detect outdoor environment temperature T11 and outdoor heat exchanger outlet temperature T9, Tc=T11-T9;
If Tc < is Ts1, controls the first electric expansion valve and be adjusted to the aperture of the electric expansion valve of throttling action and continued to need to regulate according to flow, control the second electric expansion valve and be adjusted to full-gear;
If Ts1≤Tc≤Ts2, the electric expansion valve controlling full-gear remains unchanged, and the aperture of another electric expansion valve needs to regulate according to flow;
If Tc > is Ts2, controls the first electric expansion valve and be adjusted to full-gear, control the aperture that the second electric expansion valve has been adjusted to the electric expansion valve of throttling action;
Under heating condition, detect indoor heat exchanger middle portion temperature T8,
If T8 < is Ts1 ', controls the first electric expansion valve and be adjusted to the aperture of the electric expansion valve of throttling action and continued to need to regulate according to flow, control the second electric expansion valve and be adjusted to full-gear;
If Ts1 '≤Tc≤Ts2 ', the electric expansion valve controlling full-gear remains unchanged, and the aperture of another electric expansion valve needs to regulate according to flow;
If Tc > is Ts2 ', controls the first electric expansion valve and be adjusted to full-gear, control the aperture that the second electric expansion valve has been adjusted to the electric expansion valve of throttling action.
Wherein, Ts1, Ts2, Ts3, Ts1 ', Ts2 ', Ts3 ' are design temperature.
The refrigerant circulation amount adjustment method of air-conditioner refrigerating system as above, control method comprises the start initial adjustment stage, comprising:
When during start being cooling condition, detect outdoor environment temperature T11 and compressor frequency F,
If T11 > Ts and F > Fs, control the first electric expansion valve standard-sized sheet, the second electric expansion valve plays throttling action;
If T11≤Ts or F≤Fs, control the first electric expansion valve and play throttling action, the second electric expansion valve standard-sized sheet;
Wherein, Ts is design temperature, Fs is setpoint frequency.
The refrigerant circulation amount adjustment method of air-conditioner refrigerating system as above, described control method comprises the start initial adjustment stage, comprising:
When start is for heating condition, detect outdoor environment temperature T11 and compressor frequency F,
If T11≤Ts ' and F > Fs, control the first electric expansion valve and play throttling action, the second electric expansion valve standard-sized sheet;
If T11 > Ts ' or F≤Fs, control the first electric expansion valve standard-sized sheet, the second electric expansion valve plays throttling action;
Wherein, Ts ' is design temperature, Fs is setpoint frequency.
Wherein, the first electric expansion valve and the second electric expansion valve are the electric expansion valve of same size.
The refrigerant circulation amount adjustment method of air-conditioner refrigerating system as above, detect the delivery temperature Tp of compressor, if under cooling condition, Tp > Tps, control the first electric expansion valve standard-sized sheet, control the second electric expansion valve be adjusted to the aperture of the electric expansion valve of throttling action and continued to need to regulate according to flow, wherein, Tps is compressor exhaust temperature setting value.
The refrigerant circulation amount adjustment method of air-conditioner refrigerating system as above, detect the delivery temperature Tp of compressor, if under heating condition, Tp > Tps ', control the first electric expansion valve be adjusted to the aperture of the electric expansion valve of throttling action and continued to need to regulate according to flow, control the second electric expansion valve standard-sized sheet, wherein, Tps ' is compressor exhaust temperature setting value.
Based on the design of the refrigerant circulation amount adjustment method of above-mentioned refrigeration system, the invention allows for a kind of air-conditioner, air-conditioner comprises refrigeration system, and air-conditioner refrigerating system adopts above-mentioned refrigerant circulation amount adjustment method.
Compared with prior art, advantage of the present invention and good effect are: the refrigerant circulation amount adjustment method of air-conditioner refrigerating system of the present invention is under cooling condition, regulated as the aperture of Rule of judgment to electric expansion valve by the difference of outdoor environment temperature T11 and outdoor heat exchanger outlet temperature T9, condenser finally rejects heat in air, the heat exchange efficiency of heat exchanger is relevant to the heat transfer temperature difference of air with condenser, heat transfer temperature difference is larger, heat exchange efficiency is higher, heat transfer temperature difference is lower, and heat exchange efficiency is lower.When cold-producing medium is cooled to close to environment temperature, the second half section heat exchange efficiency of heat exchanger is very low, heat exchange amount is very little, by regulating reservoir liquid storage, can the subcooled liquid that this part is condensed be stored in reservoir, the second half section of heat exchanger is used for the refrigerant heat exchanger higher with temperature, reduces condensing pressure, improve efficiency.When condensator outlet cold-producing medium distance environment temperature difference is larger, cold-producing medium is crossed not cold, cannot ensure that condensator outlet is liquid, affect the flow of air-conditioner through throttling arrangement, make reservoir be in not liquid storage state by variable expansion valve, increase system refrigerant internal circulating load.
Under heating condition.Regulated as the aperture of Rule of judgment to electric expansion valve by indoor heat exchanger middle portion temperature T8, when heating, indoor heat exchanger is as high pressure condenser, middle portion temperature i.e. condensation temperature can reflect the condensing pressure of air-conditioner, pressure is higher, power is larger, and efficiency is lower, so indoor heat exchanger middle portion temperature can not be too high when heating.Simultaneously compared with refrigeration, heat the more consideration human body comforts of needs, need to ensure that the leaving air temp of air-conditioning exceedes or close to body temperature, if the too low meeting of leaving air temp allows user not feel well even catch a cold sick, so indoor heat exchanger middle portion temperature can not be too low, when indoor heat exchanger middle portion temperature is too low, reservoir is liquid storage not, even if efficiency declines to some extent, also needs cold-producing medium to be entered indoor heat exchanger to increase circulating mass of refrigerant, improve condensing pressure, thus improve leaving air temp.
Comprise the initial adjustment stage when the present invention starts shooting, can ensure that refrigeration system enters optimal operational condition fast, shortens regulating time greatly.Due to starting stage when air-conditioner is started shooting, systemic circulation is not also stablized, each temperature spot of system is also in change, accurately can not reflect the running status of air-conditioner, if now regulate reservoir state by these temperature spots, mistuning may be caused to save, then adjust back again after stabilization, lose time.The number of chambers is according to the circulating mass of refrigerant needed when estimating start with experience by experiment, thus controls the state that reservoir is in needs, decreases the adjustment fluctuation that air-conditioning start causes because temperature spot is unstable, decreases regulating time.
The present invention has compressor air-discharging defencive function, ensures that compressor exhaust temperature is no more than higher limit, ensures air-conditioner reliability of operation.When excessive discharge temperature, increase the internal circulating load of air-conditioning system cold-producing medium, reduce the suction superheat of compressor, thus reduce the delivery temperature of compressor.
After reading the detailed description of embodiment of the present invention by reference to the accompanying drawings, the other features and advantages of the invention will become clearly.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of specific embodiment of the invention refrigeration system.
Fig. 2 is the flow chart of specific embodiment of the invention cooling condition.
Fig. 3 is the flow chart of specific embodiment of the invention heating condition.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
The present embodiment proposes a kind of air-conditioner refrigerating system refrigerant circulation amount adjustment method; described method is applicable to the refrigeration system shown in Fig. 1; wherein; refrigeration system shown in Fig. 1 is a basic refrigeration system of the present embodiment; those skilled in the art increase miscellaneous part according to demand on this refrigeration system basis, all within the protection domain of invention.
First the refrigeration system of the present embodiment is described:
As shown in Figure 1, the refrigeration system of the present embodiment comprises the compressor 1, reversal valve 2, outdoor heat exchanger 7 and the indoor heat exchanger 3 that are connected by refrigeration pipe, refrigeration pipe between outdoor heat exchanger 7 and indoor heat exchanger 3 is provided with reservoir 5, one end of reservoir 5 is connected with indoor heat exchanger 3 by the first electric expansion valve 4, and the other end of reservoir 5 is connected with outdoor heat exchanger 7 by the second electric expansion valve 6.Be provided with temperature sensor 8 at the middle part of indoor heat exchanger 3, the outlet position of outdoor heat exchanger 9 is provided with temperature sensor 9.
Wherein, the first electric expansion valve 4 and the second electric expansion valve 6 are the electric expansion valve of same size, when air-conditioner runs, any time, one of them electric expansion valve is full-gear, and another one is reducing pressure by regulating flow state, and needs to carry out aperture adjustment according to flow.
During cooling condition, compressor 1 is discharged high-pressure gaseous refrigerant and is entered outdoor heat exchanger 7 and be condensed into liquid state, through expansion valve reducing pressure by regulating flow laggard enter indoor heat exchanger 3 evaporation endothermic freeze, become overheated gas to reenter compressor 1 and compress, stream is: compressor 1-reversal valve 2-outdoor heat exchanger 7-second electric expansion valve 6-first electric expansion valve 4-indoor heat exchanger 3-reversal valve 2-compressor 1.
During heating condition, compressor 1 is discharged high-pressure gaseous refrigerant and is entered indoor heat exchanger 3 and be condensed into liquid heat of releasing and heat, through expansion valve reducing pressure by regulating flow laggard enter outdoor heat exchanger device evaporation, become overheated gas to reenter compressor 1 and compress, stream is: compressor 1-reversal valve 2-indoor heat exchanger 3-first electric expansion valve 4-second electric expansion valve 6-outdoor heat exchanger 7-reversal valve 2-compressor 1.
The pressure of cold-producing medium and temperature determine the state of cold-producing medium, and for particular types cold-producing medium, each pressure correspond to an evaporation or condensation temperature, is called saturation temperature.When the temperature of cold-producing medium is higher than saturation temperature, cold-producing medium is in gaseous state; When the temperature of cold-producing medium is lower than saturation temperature, cold-producing medium is in liquid state; When saturation temperature, cold-producing medium may be two-phase, also may be saturated liquid state or saturated gaseous state.
For reservoir 5, because be in outdoor air environment, its temperature and outdoor environment temperature are substantially identical, and when internal pressure is higher, when corresponding saturation temperature is higher than environment temperature, the agent of reservoir internal refrigeration storage can become liquid; When internal pressure is lower, when corresponding saturation temperature is lower than environment temperature, the agent of reservoir internal refrigeration storage can become gaseous state.
During for air-conditioner refrigerating operaton, because outdoor heat exchanger is as condenser and outdoor air heat exchange, the temperature exported by outdoor heat exchanger can reflect the heat exchange situation of outdoor heat exchanger, when in system, cold-producing medium is on the low side, because refrigerant flow rates is slow, heat exchange efficiency is not high, and outdoor heat exchanger outlet temperature can be higher, apparently higher than environment temperature; When in system, cold-producing medium is on the high side, the second half section of outdoor heat exchanger is occupied after a large amount of cold-producing medium is condensed, now as subcooled liquid and Air Temperature Difference little, heat exchange efficiency is not high, most suitable refrigerant charge should ensure the temperature difference of condensator outlet and outdoor ring Wen Youyi the best, generally at 2-4 degree.
Compared with machine refrigerant degree of supercooling outside sensing chamber, off-premises station cold-producing medium degree of supercooling only embodies the state of cold-producing medium, have ignored air side i.e. outdoor ring temperature to the impact of best degree of supercooling, because when outdoor environment temperature is different, the high pressure of cold-producing medium is different, corresponding saturation temperature is also different, and corresponding best degree of supercooling is also variant.And by detecting heat exchanger exit and environment temperature, air side can be combined with refrigerant side heat exchange, obtaining better heat exchange state.
And heat and freeze different, except guarantee heat exchange efficiency, must ensure that leaving air temp under heating condition is higher than human body temperature, prevent air-conditioner blowing cold air, cause human body uncomfortable, adopt indoor heat exchanger middle portion temperature so heat, the saturation temperature that namely high pressure is corresponding carrys out control valve state.In order to ensure leaving air temp, indoor heat exchanger middle portion temperature should lower than 40 degree, for ensureing that efficiency indoor heat exchanger middle portion temperature should higher than 55 degree.
Below control method of the present invention is specifically described:
As shown in Figure 2, the control method under cooling condition of the present invention is described:
Be cooling condition during start, first detect outdoor environment temperature T11 and compressor frequency F, and regulate as follows in a period of time t of start:
As outdoor environment temperature T11 > design temperature Ts, such as 32 degree, and compressor operating frequency F > setpoint frequency Fs, such as 50Hz, control the first electric expansion valve 4 standard-sized sheet, the second electric expansion valve 6 plays reducing pressure by regulating flow effect, and now reservoir 5 is positioned at low-pressure side, corresponding saturation temperature is lower than outdoor environment temperature, and internal refrigeration storage agent becomes gaseous state.If outdoor environment temperature T11≤design temperature Ts, such as 32 degree, or compressor operating frequency F≤setpoint frequency Fs, such as 50Hz, control the first electric expansion valve 4 and play reducing pressure by regulating flow effect, the second electric expansion valve 6 standard-sized sheet, now reservoir 5 is positioned at high-pressure side, corresponding saturation temperature is higher than outdoor environment temperature, and internal refrigeration storage agent becomes liquid state.
After the refrigeration t time, regulate as follows:
Judge that whether the circulating mass of refrigerant of air-conditioner is suitable according to outdoor environment temperature T11 and outdoor heat exchanger outlet temperature T9, judge at set intervals once, as 3min:
Tc=T11-T9
Every 3min judges TcDE state,
When Tc<3 DEG C (2-3 degree is comparatively suitable), system refrigerant is on the high side, control the first electric expansion valve 4 be adjusted to the aperture of the electric expansion valve of throttling action and continued to need to regulate according to flow, play reducing pressure by regulating flow effect, second electric expansion valve 6 standard-sized sheet, now reservoir 5 is in high pressure conditions, and cold-producing medium is liquid, reduces intrasystem circulating mass of refrigerant.
When Tc>5 (4-5 degree is comparatively suitable), system refrigerant is on the low side, control the first electric expansion valve 4 standard-sized sheet, second electric expansion valve 6 has been adjusted to the aperture of the electric expansion valve of throttling action and has continued to need to regulate according to flow, now reservoir 5 is in low-pressure state, cold-producing medium is gaseous state, increases intrasystem circulating mass of refrigerant.
When 3≤Tc≤5, the first electric expansion valve 4 and the second electric expansion valve hold mode constant, the electric expansion valve of full-gear keeps standard-sized sheet, and the aperture of another electric expansion valve continues to need to regulate according to flow.
As shown in Figure 3, the control method under heating condition of the present invention is described:
Be heating condition during start, first detect outdoor environment temperature T11 and compressor frequency F, and regulate as follows in a period of time t of start:
As outdoor environment temperature T11≤design temperature Ts ', such as-2 degree, and compressor operating frequency F > setpoint frequency Fs, such as 50Hz, control the second electric expansion valve 6 standard-sized sheet, the first electric expansion valve 4 plays reducing pressure by regulating flow effect, and now reservoir 5 is positioned at low-pressure side, corresponding saturation temperature is lower than outdoor environment temperature, and internal refrigeration storage agent becomes gaseous state.If outdoor environment temperature T11 > design temperature Ts ', such as-2 degree, or compressor frequency F≤setpoint frequency Fs, such as 50Hz, control the second electric expansion valve 6 and play reducing pressure by regulating flow effect, the first electric expansion valve 4 standard-sized sheet, now reservoir 5 is positioned at high-pressure side, corresponding saturation temperature is higher than outdoor environment temperature, and internal refrigeration storage agent becomes liquid state.
After the refrigeration t time, regulate as follows:
Gather indoor heat exchanger middle portion temperature T8, the saturation temperature that namely high pressure is corresponding carrys out control valve state.For ensureing leaving air temp, indoor heat exchanger middle portion temperature should lower than 40 degree, for guarantee efficiency indoor heat exchanger middle portion temperature should higher than 55 degree.
During T8>55 DEG C, system refrigerant is on the high side, first electric expansion valve 4 standard-sized sheet, second electric expansion valve 6 has been adjusted to the aperture of the expansion valve of throttling action and has continued to need to regulate according to flow, now reservoir 5 is in high pressure conditions, cold-producing medium is liquid, reduces intrasystem circulating mass of refrigerant.
During T8<40 DEG C, controlling cryogen is on the low side many, first electric expansion valve 4 has been adjusted to the aperture of the expansion valve of throttling action and has continued to need to regulate according to flow, second electric expansion valve 6 standard-sized sheet, now reservoir 5 is in low-pressure state, cold-producing medium is gaseous state, increases intrasystem circulating mass of refrigerant.
During 55 DEG C of <T8<40 DEG C, the electric expansion valve controlling full-gear remains unchanged, and the aperture of another electric expansion valve needs to regulate according to flow.
The present embodiment increases circulating mass of refrigerant can reduce suction superheat; promote low pressure; reduce delivery temperature; and be keep air-conditioner operational reliability; compressor temperature can not be too high; preferably not higher than 100 DEG C; so when the delivery temperature Tp > of compressor sets delivery temperature Tps or Tps '; wherein; Tps is the setting value of cooling condition, the setting value that Tps ' is heating condition, and the two can adopt same numerical value; such as 90 DEG C time, need to protect press delivery temperature.Certainly also different numerical value can be adopted.
As compressor exhaust temperature Tp>90 DEG C,
If air-conditioner is under cooling condition, no matter then Tc is how many, control the first electric expansion valve 4 standard-sized sheet, second electric expansion valve 6 has been adjusted to the aperture of the electric expansion valve of throttling action and has continued to need to regulate according to flow, now reservoir 5 is in low-pressure state, cold-producing medium is gaseous state, increases intrasystem circulating mass of refrigerant.
If air-conditioning is under heating condition, no matter T8 is how many, control the first electric expansion valve 4 be adjusted to the aperture of the electric expansion valve of throttling action and continued to need to regulate according to flow, second electric expansion valve 6 standard-sized sheet, now reservoir 5 is in low-pressure state, cold-producing medium is gaseous state, increases intrasystem circulating mass of refrigerant.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (7)
1. the refrigerant circulation amount adjustment method of an air-conditioner refrigerating system, refrigeration system comprises the compressor, reversal valve, outdoor heat exchanger and the indoor heat exchanger that are connected by refrigeration pipe, refrigeration pipe between described outdoor heat exchanger and indoor heat exchanger is provided with reservoir, one end of described reservoir is connected with indoor heat exchanger by the first electric expansion valve, the other end of described reservoir is connected with outdoor heat exchanger by the second electric expansion valve, it is characterized in that, described control method is:
Under cooling condition, detect outdoor environment temperature T11 and outdoor heat exchanger outlet temperature T9, Tc=T11-T9;
If Tc < is Ts1, controls the first electric expansion valve and be adjusted to the aperture of the electric expansion valve of throttling action and continued to need to regulate according to flow, control the second electric expansion valve and be adjusted to full-gear;
If Ts1≤Tc≤Ts2, the electric expansion valve controlling full-gear remains unchanged, and the aperture of another electric expansion valve needs to regulate according to flow;
If Tc > is Ts2, controls the first electric expansion valve and be adjusted to full-gear, control the aperture that the second electric expansion valve has been adjusted to the electric expansion valve of throttling action;
Under heating condition, detect indoor heat exchanger middle portion temperature T8,
If T8 < is Ts1 ', controls the first electric expansion valve and be adjusted to the aperture of the electric expansion valve of throttling action and continued to need to regulate according to flow, control the second electric expansion valve and be adjusted to full-gear;
If Ts1 '≤Tc≤Ts2 ', the electric expansion valve controlling full-gear remains unchanged, and the aperture of another electric expansion valve needs to regulate according to flow;
If Tc > is Ts2 ', controls the first electric expansion valve and be adjusted to full-gear, control the aperture that the second electric expansion valve has been adjusted to the electric expansion valve of throttling action
Wherein, Ts1, Ts2, Ts3, Ts1 ', Ts2 ', Ts3 ' are design temperature.
2. the refrigerant circulation amount adjustment method of air-conditioner refrigerating system according to claim 1, is characterized in that, described control method comprises the start initial adjustment stage, comprising:
When during start being cooling condition, detect outdoor environment temperature T11 and compressor frequency F,
If T11 > Ts and F > Fs, control the first electric expansion valve standard-sized sheet, the second electric expansion valve plays throttling action;
If T11≤Ts or F≤Fs, control the first electric expansion valve and play throttling action, the second electric expansion valve standard-sized sheet;
Wherein, Ts is design temperature, Fs is setpoint frequency.
3. the refrigerant circulation amount adjustment method of air-conditioner refrigerating system according to claim 1 and 2, is characterized in that, described control method comprises the start initial adjustment stage, comprising:
When start is for heating condition, detect outdoor environment temperature T11 and compressor frequency F,
If T11≤Ts ' and F > Fs, control the first electric expansion valve and play throttling action, the second electric expansion valve standard-sized sheet;
If T11 > Ts ' or F≤Fs, control the first electric expansion valve standard-sized sheet, the second electric expansion valve plays throttling action;
Wherein, Ts ' is design temperature, Fs is setpoint frequency.
4. the refrigerant circulation amount adjustment method of air-conditioner refrigerating system according to claim 1, is characterized in that, described first electric expansion valve and the second electric expansion valve are the electric expansion valve of same size.
5. the refrigerant circulation amount adjustment method of air-conditioner refrigerating system according to claim 1, it is characterized in that, detect the delivery temperature Tp of compressor, if under cooling condition, Tp > Tps, controls the first electric expansion valve standard-sized sheet, controls the second electric expansion valve and has been adjusted to the aperture of the electric expansion valve of throttling action and has continued to need to regulate according to flow, wherein, Tps is compressor exhaust temperature setting value.
6. the refrigerant circulation amount adjustment method of air-conditioner refrigerating system according to claim 1, it is characterized in that, detect the delivery temperature Tp of compressor, if under heating condition, Tp > Tps ', controls the first electric expansion valve and has been adjusted to the aperture of the electric expansion valve of throttling action and has continued to need to regulate according to flow, control the second electric expansion valve standard-sized sheet, wherein, Tps ' is compressor exhaust temperature setting value.
7. an air-conditioner, described air-conditioner comprises refrigeration system, it is characterized in that: air-conditioner refrigerating system adopts the refrigerant circulation amount adjustment method described in claim 1-6 any one.
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