CN103512152B - The control method of air-conditioning system and the coolant quantity for it - Google Patents

Abstract

The present invention proposes a kind of control method of the coolant quantity for air-conditioning system, described air-conditioning system comprises an off-premises station and multiple stage indoor set, off-premises station has condenser and every platform indoor set in multiple stage indoor set has evaporimeter, electric expansion valve and magnetic valve, and control method comprises: the duty detecting the every platform indoor set in multiple stage indoor set; When at least one indoor set in multiple stage indoor set is closed, detect the first temperature parameter of condenser and the second temperature parameter of the evaporimeter of the every platform indoor set in one or more indoor set of detection unlatching, detect outdoor environment temperature and indoor environment temperature; The electric expansion valve of every platform indoor set and magnetic valve is controlled to realize the control to coolant quantity according to the first temperature parameter, the second temperature parameter, outdoor environment temperature and indoor environment temperature.Control method of the present invention can improve the performance of air-conditioning system, can improve the reliability of air-conditioning compressor.The present invention proposes a kind of air-conditioning system simultaneously.

Description

The control method of air-conditioning system and the coolant quantity for it

Technical field

The present invention relates to air conditioner controlling technology field, particularly a kind of air-conditioning system, and a kind of control method of the coolant quantity for this air-conditioning system.

Background technology

At present, optimal refrigerant amount in multi-split air conditioner work is mainly determined according to rated point, such as, some multi-split air conditioners are according to five rated point such as A2, B2, EV, B1, F1 determines its optimal refrigerant amount, but, generally, the determination of rated point is selected when all indoor sets are all in running status, and in fact, when multi-split air conditioner runs and not all indoor set is all in running status, an indoor set is such as only had to run, or only have two indoor sets to run, the optimal refrigerant amount that now original rated point is determined has not been optimal refrigerant amount for the pattern that air-conditioner is running, because other indoor sets do not start, and the indoor set do not started substantially seldom is measured without refrigerant or refrigerant in multi-split air conditioner running, thus make the coolant quantity of operating indoor set and off-premises station too much, and then cause the Performance And Reliability of multi-split air conditioner to decline.

Summary of the invention

Object of the present invention is intended to solve one of above-mentioned technical problem at least to a certain extent.

For this reason, one object of the present invention is the control method proposing a kind of coolant quantity for air-conditioning system, and this control method can improve the performance of air-conditioning system and the stability of compressor.

Another object of the present invention is to propose a kind of air-conditioning system.

For achieving the above object, one aspect of the present invention embodiment proposes a kind of control method of the coolant quantity for air-conditioning system, wherein said air-conditioning system comprises an off-premises station and multiple stage indoor set, a described off-premises station has condenser and every platform indoor set in described multiple stage indoor set has evaporimeter, electric expansion valve and magnetic valve, and described control method comprises the steps: the duty of the every platform indoor set detected in described multiple stage indoor set; When at least one indoor set in described multiple stage indoor set is closed, detect the first temperature parameter of described condenser and the second temperature parameter of the evaporimeter of the every platform indoor set in one or more indoor set of detection unlatching, and detect outdoor environment temperature and indoor environment temperature; The electric expansion valve of described every platform indoor set and magnetic valve is controlled to realize the control to the coolant quantity of described air-conditioning system according to described first temperature parameter, described second temperature parameter, described outdoor environment temperature and described indoor environment temperature.

According to the control method of the coolant quantity for air-conditioning system of the embodiment of the present invention, the electric expansion valve of at least one indoor set and the opening and closing of magnetic valve of closedown are controlled according to each temperature parameter, namely at least one the indoor set by closing stores or release refrigerant regulates the indoor set of unlatching and the coolant quantity of off-premises station, and Performance for Air Conditioning Systems can be made to reach optimization.In addition, because at least one the indoor set of closing stores part refrigerant, the reliability of compressor can be made to be further improved.

In one embodiment of the invention, the first temperature parameter detecting described condenser comprises: the internal temperature and the outlet temperature that detect described condenser.

In another embodiment of the present invention, the second temperature parameter detecting the evaporimeter of the every platform indoor set in one or more indoor set opened comprises: detect the internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set of described unlatching, outlet temperature and inlet temperature.

In some embodiments of the invention, when described air-conditioning system is in refrigeration mode, the electric expansion valve and the magnetic valve that control described every platform indoor set specifically comprise: according to described outdoor environment temperature, the internal temperature of described condenser and outlet temperature, the outlet temperature of the evaporimeter of the every platform indoor set in one or more indoor set of described unlatching calculates the degree of supercooling of described condenser, the mean outlet temperature of the evaporimeter of one or more indoor set of first temperature difference and described unlatching, wherein said first temperature difference is the outlet temperature of described condenser and the difference of described outdoor environment temperature, the aperture controlling the electric expansion valve of the every platform indoor set in one or more indoor set of described unlatching reaches the mean outlet temperature of one or more evaporimeter of described unlatching with the outlet temperature of the evaporimeter making the every platform indoor set in one or more indoor set of described unlatching, when the degree of supercooling of described condenser is less than predetermined threshold value and described first temperature difference is greater than the first temperature threshold, the electric expansion valve controlling any indoor set at least one the indoor set of closing is closed, and the magnetic valve controlling the evaporator outlet of any indoor set at least one indoor set of described cut out cuts out after opening the first Preset Time, when the degree of supercooling of described condenser is greater than described predetermined threshold value and described first temperature difference is less than described first temperature threshold, control the closed electromagnetic valve of the evaporator outlet of any indoor set at least one indoor set of described closedown, and the electric expansion valve controlling any indoor set at least one indoor set of described closedown is closed after opening the second Preset Time.

In another embodiment of the present invention, when described air-conditioning system is in heating mode, the electric expansion valve and the magnetic valve that control described every platform indoor set specifically comprise: according to described indoor environment temperature, the internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set opened and inlet temperature calculate the average internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set of described unlatching, second temperature difference and the 3rd temperature difference, wherein said second temperature difference is the difference of the average inlet temperature of the evaporimeter of every platform indoor set in the average internal temperature of evaporimeter of every platform indoor set in one or more indoor set of described unlatching and one or more indoor set of described unlatching, described 3rd temperature difference is the average inlet temperature of evaporimeter and the difference of described indoor environment temperature of every platform indoor set in one or more indoor set of described unlatching, the aperture controlling the electric expansion valve of the every platform indoor set in one or more indoor set of described unlatching reaches the average internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set of described unlatching with the internal temperature of the evaporimeter making the every platform indoor set in one or more indoor set of described unlatching, when described second temperature difference is less than the second temperature threshold and described 3rd temperature difference is greater than the 3rd temperature threshold, control the closed electromagnetic valve of the evaporator outlet of any indoor set at least one the indoor set of closing, and the electric expansion valve controlling any indoor set at least one indoor set of described closedown is closed after opening the 3rd Preset Time, when described second temperature difference is greater than described second temperature threshold and described 3rd temperature difference is less than the 3rd temperature threshold, the electric expansion valve controlling any indoor set at least one indoor set of described closedown is closed, and the magnetic valve controlling the evaporator outlet of any indoor set at least one indoor set of described cut out cuts out after opening the 4th Preset Time.

For achieving the above object, another aspect of the present invention embodiment proposes a kind of air-conditioning system, this air-conditioning system comprises: off-premises station, and described off-premises station comprises compressor and condenser, and the outlet of described compressor is connected with the import of described condenser by a cross valve, multiple stage indoor set, every platform indoor set in described multiple stage indoor set comprises evaporimeter, electric expansion valve and magnetic valve, one end of described electric expansion valve is connected with the outlet of described condenser, the other end of described electric expansion valve is connected with the import of described evaporimeter, one end of described magnetic valve is connected with the outlet of described evaporimeter, and the other end of described magnetic valve is connected by the import of described cross valve with described compressor, for detecting the first detection module of the duty of the every platform indoor set in described multiple stage indoor set, for detecting the second detection module of the first temperature parameter of described condenser and the 3rd detection module for the second temperature parameter of detecting described evaporimeter, for detecting the 4th detection module of outdoor environment temperature and indoor environment temperature, control module, described control module and described electric expansion valve, described magnetic valve, described first detection module, described second detection module, described 3rd detection module is connected with described 4th detection module, described control module is when at least one the indoor set that described first detection module detects in described multiple stage indoor set is closed, according to described first temperature parameter, described second temperature parameter, the electric expansion valve of described outdoor environment temperature and the described every platform indoor set of described indoor environment temperature control and magnetic valve are to realize the control to the coolant quantity of described air-conditioning system.

According to the air-conditioning system of the embodiment of the present invention, control module controls the electric expansion valve of at least one indoor set and the opening and closing of magnetic valve of closedown according to each temperature parameter, namely at least one the indoor set by closing stores or release refrigerant regulates the indoor set of unlatching and the coolant quantity of off-premises station, and Performance for Air Conditioning Systems can be made to reach optimization.In addition, at least one the indoor set controlling to close by control module stores or release portion refrigerant, and the reliability of compressor can be made to be further improved.

In one embodiment of the invention, described second detection module comprises further: the first temperature sensor, for detecting the internal temperature of described condenser; Second temperature sensor, for detecting the outlet temperature of described condenser.

In another embodiment of the present invention, described 3rd detection module comprises further: three-temperature sensor, for detecting the internal temperature of described evaporimeter; 4th temperature sensor, for detecting the outlet temperature of described evaporimeter; 5th temperature sensor, for detecting the inlet temperature of described evaporimeter.

In one embodiment of the invention, when described air-conditioning system is in refrigeration mode, described control module is according to described outdoor environment temperature, the internal temperature of described condenser and outlet temperature, the outlet temperature of the evaporimeter of the every platform indoor set in one or more indoor set of described unlatching calculates the degree of supercooling of described condenser, the mean outlet temperature of the evaporimeter of one or more indoor set of first temperature difference and described unlatching, and the aperture controlling the electric expansion valve of the every platform indoor set in one or more indoor set of described unlatching reaches the mean outlet temperature of one or more evaporimeter of described unlatching with the outlet temperature of the evaporimeter making the every platform indoor set in one or more indoor set of described unlatching, wherein said first temperature difference is the outlet temperature of described condenser and the difference of described outdoor environment temperature.

In another embodiment of the present invention, described control module also for be less than predetermined threshold value in the degree of supercooling of described condenser and described first temperature difference is greater than the first temperature threshold time control any indoor set at least one the indoor set of closing electric expansion valve close, and the magnetic valve controlling the evaporator outlet of any indoor set at least one indoor set of described cut out cuts out after opening the first Preset Time.

In yet another embodiment of the present invention, described control module also for be greater than described predetermined threshold value in the degree of supercooling of described condenser and described first temperature difference is less than described first temperature threshold time control the closed electromagnetic valve of the evaporator outlet of any indoor set at least one indoor set of described closedown, and the electric expansion valve controlling any indoor set at least one indoor set of described closedown is closed after opening the second Preset Time.

In some embodiments of the invention, when described air-conditioning system is in heating mode, described control module is also according to described indoor environment temperature, the internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set opened and inlet temperature calculate the average internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set of described unlatching, second temperature difference and the 3rd temperature difference, and the aperture controlling the electric expansion valve of the every platform indoor set in one or more indoor set of described unlatching reaches the average internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set of described unlatching with the internal temperature of the evaporimeter making the every platform indoor set in one or more indoor set of described unlatching, wherein said second temperature difference is the difference of the average inlet temperature of the evaporimeter of every platform indoor set in the average internal temperature of evaporimeter of every platform indoor set in one or more indoor set of described unlatching and one or more indoor set of described unlatching, described 3rd temperature difference is the average inlet temperature of evaporimeter and the difference of described indoor environment temperature of every platform indoor set in one or more indoor set of described unlatching.

In one embodiment of the invention, described control module also for be less than the second temperature threshold in described second temperature difference and described 3rd temperature difference is greater than the 3rd temperature threshold time, control the closed electromagnetic valve of the evaporator outlet of any indoor set at least one the indoor set of closing, and the electric expansion valve controlling any indoor set at least one indoor set of described closedown is closed after opening the 3rd Preset Time.

In another embodiment of the present invention, described control module also for be greater than described second temperature threshold in described second temperature difference and described 3rd temperature difference is less than the 3rd temperature threshold time, the electric expansion valve controlling any indoor set at least one indoor set of described closedown is closed, and the magnetic valve controlling the evaporator outlet of any indoor set at least one indoor set of described cut out cuts out after opening the 4th Preset Time.

Particularly, in one embodiment of the invention, the scope of described predetermined threshold value is 0 ~ 15 DEG C, and the scope of described first temperature threshold is 0 ~ 10 DEG C, and the scope of described first Preset Time and the second Preset Time is 0 ~ 5 second.

In addition, in another embodiment of the present invention, the scope of described second temperature threshold is 0 ~ 20 DEG C, and the scope of described 3rd temperature threshold is 0 ~ 15 DEG C, and the scope of described 3rd Preset Time and the 4th Preset Time is 0 ~ 5 second.

The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.

Accompanying drawing explanation

The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:

Fig. 1 is the flow chart of the control method of the coolant quantity for air-conditioning system according to the embodiment of the present invention;

Fig. 2 is the flow chart of the control method of the coolant quantity for air-conditioning system according to a specific embodiment of the present invention;

Fig. 3 is the structural representation of the air-conditioning system according to the embodiment of the present invention; And

Fig. 4 is the structural representation of air-conditioning system according to an embodiment of the invention.

Reference numeral

Off-premises station 301, multiple stage indoor set 302, first detection module 303, second detection module 304, the 3rd detection module 305, controller 306, compressor 307, condenser 308, cross valve 309, evaporimeter 310, electric expansion valve 311, magnetic valve 312, first temperature sensor 401, second temperature sensor 402, three-temperature sensor 403, the 4th temperature sensor 404 and the 5th temperature sensor 405.

Detailed description of the invention

Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.

Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the invention provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can comprise the embodiment that the first and second features are formed as directly contact, also can comprise other feature and be formed in embodiment between the first and second features, such first and second features may not be direct contacts.

In describing the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.

With reference to description below and accompanying drawing, these and other aspects of embodiments of the invention will be known.Describe at these and in accompanying drawing, specifically disclose some particular implementation in embodiments of the invention, representing some modes of the principle implementing embodiments of the invention, but should be appreciated that the scope of embodiments of the invention is not limited.On the contrary, embodiments of the invention comprise fall into attached claims spirit and intension within the scope of all changes, amendment and equivalent.

The control method of the coolant quantity for air-conditioning system according to the embodiment of the present invention is described with reference to the accompanying drawings.

Air-conditioning system in the control method of the coolant quantity for air-conditioning system of the embodiment of the present invention comprises an off-premises station and multiple stage indoor set, and off-premises station has condenser and every platform indoor set in multiple stage indoor set has evaporimeter, electric expansion valve and magnetic valve.As shown in Figure 1, the control method of the coolant quantity for air-conditioning system of the embodiment of the present invention comprises the following steps:

S101, detects the duty of the every platform indoor set in multiple stage indoor set.

Namely say, the every platform indoor set detected in multiple stage indoor set is in opening or closed condition.When every platform indoor set is all in opening, namely controls indoor set according to existing method according to normal mode control electric expansion valve and magnetic valve and start, and enter step S102 when at least one indoor set in multiple stage indoor set is closed.

S102, detects the first temperature parameter of condenser and the second temperature parameter of the evaporimeter of the every platform indoor set in one or more indoor set of detection unlatching, and detects outdoor environment temperature and indoor environment temperature.

When at least one indoor set in multiple stage indoor set is closed, namely the first temperature parameter detecting condenser detects internal temperature and the outlet temperature of condenser, and namely the second temperature parameter of evaporimeter detecting the every platform indoor set in one or more indoor set opened detects the internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set of unlatching, outlet temperature and inlet temperature, and detect outdoor environment temperature and indoor environment temperature.

S103, controls the electric expansion valve of every platform indoor set and magnetic valve to realize the control to the coolant quantity of air-conditioning system according to the first temperature parameter, the second temperature parameter, outdoor environment temperature and indoor environment temperature.

Namely say, according to internal temperature and the outlet temperature of the condenser of step S101 detection, the internal temperature of evaporimeter of the every platform indoor set in one or more indoor set opened, outlet temperature and inlet temperature, and outdoor environment temperature and indoor environment temperature control the electric expansion valve of every platform indoor set and magnetic valve to realize the control to the coolant quantity of air-conditioning system.To describe in detail according to the control of said temperature parameter to the coolant quantity of air-conditioning system below.

In one embodiment of the invention, when air-conditioning system is in refrigeration mode, the electric expansion valve and the magnetic valve that control every platform indoor set specifically comprise:

The outlet temperature of the evaporimeter of the every platform indoor set in the outdoor environment temperature, the internal temperature of condenser and the outlet temperature that detect according to step S102, one or more indoor set of unlatching calculates the mean outlet temperature of evaporimeter of one or more indoor set of the degree of supercooling of condenser, first temperature difference and unlatching, and wherein first temperature difference is the outlet temperature of condenser and the difference of outdoor environment temperature.Particularly, such as, the internal temperature of condenser setting off-premises station is CM, the outlet temperature of condenser is CO, open in i-th indoor machine evaporation outlet temperature be EOi, outdoor environment temperature is T4.The then degree of supercooling CA=CM-CO of condenser, the first temperature difference CB=CO-T4, mean outlet temperature CC=(the EO1+EO2+......+EOi)/i of the evaporimeter of one or more indoor set of unlatching.

In one embodiment of the invention, after the mean outlet temperature CC of the evaporimeter of acquisition degree of supercooling CA, first temperature difference CB of condenser, one or more indoor set of unlatching, the aperture controlling the electric expansion valve of the every platform indoor set in one or more indoor set opened reaches the mean outlet temperature of one or more evaporimeter of unlatching with the outlet temperature of the evaporimeter making the every platform indoor set in one or more indoor set of unlatching.Generally, when open in i-th indoor machine evaporation outlet temperature be EOi be less than mean outlet temperature CC and the EOi<CC of the evaporimeter of one or more indoor set of unlatching time, the aperture controlling the electric expansion valve of the evaporimeter of one or more indoor set opened increases, otherwise the aperture then controlling the electric expansion valve of the evaporimeter of one or more indoor set opened reduces.

In one embodiment of the invention, the predetermined threshold value of degree of supercooling setting condenser is CAS, the outlet temperature of condenser and the first temperature threshold of outdoor environment temperature are CBS.When the degree of supercooling CA of condenser is less than predetermined threshold value CAS and the first temperature difference CB is greater than the first temperature threshold CBS, namely as CA<CAS and CB>CBS time, the electric expansion valve controlling any indoor set at least one the indoor set of closing is closed, and the magnetic valve of evaporator outlet controlling any indoor set at least one the indoor set of cutting out opens the first Preset Time such as Pc and cuts out after second, namely say, the evaporimeter of any indoor set at least one the indoor set of cutting out stops after discharging refrigerant Pc second, and then judge whether CA<CAS and CB>CBS, if, then repeat aforesaid operations, namely the electric expansion valve controlling any indoor set at least one the indoor set of closing is closed, and the magnetic valve of evaporator outlet controlling any indoor set at least one the indoor set of cutting out opens the first Preset Time such as Pc and cuts out after second, circulation like this, until do not meet CA<CAS and CB>CBS, then any electric expansion valve of an indoor set at least one the indoor set of closing and the magnetic valve of evaporator outlet are all closed.

In another embodiment of the present invention, when the degree of supercooling CA of condenser is greater than predetermined threshold value CAS and the first temperature difference CB is less than the first temperature threshold CBS, namely CA>CAS and CB<CBS time, control the closed electromagnetic valve of the evaporator outlet of any indoor set at least one the indoor set of closing, and the electric expansion valve controlling any indoor set at least one the indoor set of closing is closed after opening the second Preset Time such as Sc.Namely say, as CA>CAS and CB<CBS time, stop after the evaporimeter absorption refrigerant Sc time of any indoor set at least one the indoor set of closing, and then judge whether CA>CAS and CB<CBS, if, then repeat aforesaid operations, namely the closed electromagnetic valve of the evaporator outlet of any indoor set at least one the indoor set of closing is controlled, and the electric expansion valve controlling any indoor set at least one the indoor set of closing is closed after opening the second Preset Time such as Sc, circulation like this, until do not meet CA>CAS and CB<CBS, then any electric expansion valve of an indoor set at least one the indoor set of closing and the magnetic valve of evaporator outlet are all closed.

In one embodiment of the invention, when air-conditioning system is in heating mode, the electric expansion valve and the magnetic valve that control every platform indoor set specifically comprise:

According to the indoor environment temperature that step S102 detects, the internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set opened and inlet temperature calculate the average internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set opened, second temperature difference and the 3rd temperature difference, wherein second temperature difference is the difference of the average inlet temperature of the evaporimeter of the average internal temperature of evaporimeter of every platform indoor set in one or more indoor set opened and the every platform indoor set in one or more indoor set of unlatching, 3rd temperature difference is the average inlet temperature of evaporimeter of every platform indoor set in one or more indoor set opened and the difference of indoor environment temperature.Particularly, such as, setting indoor environment temperature is T1, the internal temperature of the evaporimeter of every platform indoor set in one or more indoor set of unlatching is EMi, inlet temperature is EIi, the average internal temperature HC=(EM1+EM2+...+EMi of the evaporimeter of the every platform indoor set in one or more indoor set then opened)/i, second temperature difference HA=HC-(EI1+EI2+...+EIi)/i, the 3rd temperature difference is HB=(EI1+EI2+...+EIi)/i-T1.

In one embodiment of the invention, after average internal temperature HC, second temperature difference HA of the evaporimeter of the every platform indoor set in one or more indoor set calculating acquisition unlatching, the 3rd temperature difference are HB, the aperture controlling the electric expansion valve of the every platform indoor set in one or more indoor set opened reaches the average internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set of unlatching with the internal temperature of the evaporimeter making the every platform indoor set in one or more indoor set of unlatching.Generally, when the internal temperature of evaporimeter of the every platform indoor set in one or more indoor set opened be EMi be less than average internal temperature HC and the EMi<HC of the evaporimeter of the every platform indoor set in one or more indoor set of unlatching time, the aperture controlling the electric expansion valve of the every platform indoor set in one or more indoor set opened reduces, otherwise the aperture controlling the electric expansion valve of the every platform indoor set in one or more indoor set opened increases.

In one embodiment of the invention, threshold value i.e. the second temperature threshold setting the second temperature difference HA is HAS, threshold value i.e. the 3rd temperature threshold of the 3rd temperature difference HB is HBS, when the second temperature difference HA is less than the second temperature threshold HAS and the 3rd temperature difference HB is greater than the 3rd temperature threshold HBS, namely as HA<HAS and HB>HBS time, control the closed electromagnetic valve of the evaporator outlet of any indoor set at least one the indoor set of closing, and the electric expansion valve controlling any indoor set at least one the indoor set of closing is closed after opening the 3rd Preset Time such as Ph.Namely say, as HA<HAS and HB>HBS time, stop after the evaporimeter discharge refrigerant Ph time of any indoor set at least one the indoor set of closing, then, again judge whether to meet HA<HAS and HB>HBS, if, then repeat aforesaid operations, namely the closed electromagnetic valve of the evaporator outlet of any indoor set at least one the indoor set of closing is controlled, and the electric expansion valve controlling any indoor set at least one the indoor set of closing is closed after opening the 3rd Preset Time such as Ph, until do not meet HA<HAS and HB>HBS, then the electric expansion valve of any indoor set at least one the indoor set of closing and magnetic valve are all closed.

In another embodiment of the present invention, when the second temperature difference HA is greater than the second temperature threshold HAS and the 3rd temperature difference HB is less than the 3rd temperature threshold HBS, namely as HA>HAS and HB<HBS time, the electric expansion valve controlling any indoor set at least one the indoor set of closing is closed, and the magnetic valve controlling the evaporator outlet of any indoor set at least one the indoor set of cutting out cuts out after opening the 4th Preset Time such as Sh.Namely say, as HA>HAS and HB<HBS time, stop after the absorption refrigerant Sh time of the evaporimeter of any indoor set at least one the indoor set of closing, and then judge whether HA>HAS and HB<HBS, if, then repeat aforesaid operations, namely the electric expansion valve controlling any indoor set at least one the indoor set of closing is closed, and the magnetic valve controlling the evaporator outlet of any indoor set at least one the indoor set of cutting out cuts out after opening the 4th Preset Time such as Sh, until do not meet HA>HAS and HB<HBS, then the magnetic valve of the evaporator outlet of any indoor set at least one the indoor set of closing and electric expansion valve are closed.

In one particular embodiment of the present invention, as shown in Figure 2, the control procedure of the control method of the above-mentioned coolant quantity for air-conditioning system is as follows:

S201, controls indoor set and normally runs.

After start, control the electric expansion valve of indoor set and magnetic valve according to existing control method, normally run to control indoor set, the control method of namely all opening according to all indoor sets controls the indoor set opened, after air-conditioning system is normally run, enter step S202.

S202, judges that current whether at least one indoor set is closed.

If so, then enter step S203 according to the operational mode of air-conditioning system or enter step S211, or entering step S219, if not, then entering step S201.

S203, when air-conditioning system is in refrigeration mode, detected temperatures parameter CM, CO, T4, EOi.

After detection obtains parameter CM, CO, T4, EOi, enter step S204.

S204, calculating parameter CA, CB, CC.

CM, CO, T4, EOi parameter obtained is detected, calculating parameter CA, CB, CC according to step S203.

S205, controls the aperture of the electric expansion valve of the indoor set opened to make EOi=CC.

Generally, as EOi<CC, the aperture controlling electric expansion valve increases, otherwise the aperture controlling electric expansion valve reduces.When making EOi=CC, enter step S206.

S206, controls electric expansion valve and the closed electromagnetic valve of at least one the indoor set of closing any one.

In at least one the indoor set of closing after the electric expansion valve of any and closed electromagnetic valve, enter step S207 and S208.

S207, judges whether CA<CAS and CB>CBS.

If so, step S209 is entered; If not, step S206 is entered.

S208, judges whether CA>CAS and CB<CBS.

If so, step S210 is entered, if otherwise enter step S206.

S209, the electric expansion valve controlling any at least one the indoor set of closing is closed, and Pc second opened by the magnetic valve of evaporator outlet.

The electric expansion valve controlling any at least one the indoor set of closing is closed, and the magnetic valve of evaporator outlet cuts out after opening Pc second, namely enters step S206.

S210, controls the closed electromagnetic valve of the evaporator outlet of any at least one the indoor set of closing, and electric expansion valve opens Sc second.

The closed electromagnetic valve of the evaporator outlet of any at least one the indoor set of closing, electric expansion valve unlatching Sc closed after second, namely entered step S206.

S211, when air-conditioning system is in heating mode, detected temperatures parameter EMi, T1, EIi.

After detection obtains parameter EMi, T1, EIi, enter step S212.

S212, accounting temperature parameter HA, HB, HC.

Temperature parameter EMi, T1, EIi of obtaining is detected, accounting temperature parameter HA, HB, HC according to step S211.

S213, controls the aperture of the electric expansion valve of the indoor set opened to make EMi=HC.

Generally, as EMi<HC, the aperture controlling the electric expansion valve of the indoor set opened reduces, otherwise the electric expansion valve controlling the indoor set opened increases.After making EMi<HC, enter step S214.

S214, controls the electric expansion valve of any at least one the indoor set of closing and closed electromagnetic valve.

Close at least one indoor set in the electric expansion valve of any and closed electromagnetic valve after, enter step S215 and S216.

S215, judges whether HA<HAS and HB>HBS.

If so, enter step S217, if not, enter step S214.

S216, judges whether HA>HAS and HB<HBS.

If so, then enter step S218, if not, enter step S214.

S217, controls the closed electromagnetic valve of the evaporator outlet of any at least one the indoor set of closing, and electric expansion valve opens Ph second.

The closed electromagnetic valve of the evaporator outlet of any at least one indoor set of closing, and after electric expansion valve opens Ph second, enter step S214.

S218, the electric expansion valve controlling any at least one the indoor set of closing is closed, and Sh second opened by evaporator outlet magnetic valve.

The electric expansion valve of any one at least one the indoor set of closing is closed, and after evaporator outlet magnetic valve opens Sh second, enters step S214.

S219, when air-conditioning system is in other operational modes, the electric expansion valve and the evaporator outlet magnetic valve that control the indoor set opened normally run.

Be in that other operational modes are such as blown in air-conditioning system, the operational mode except refrigeration mode and heating mode such as dehumidifying time, the control method of all opening according to all indoor sets controls the indoor set opened.

In sum, according to the control method of the coolant quantity for air-conditioning system of the embodiment of the present invention, the electric expansion valve of at least one indoor set and the opening and closing of magnetic valve of closedown are controlled according to each temperature parameter, namely at least one the indoor set by closing stores or release refrigerant regulates the indoor set of unlatching and the coolant quantity of off-premises station, and Performance for Air Conditioning Systems can be made to reach optimization.In addition, because at least one the indoor set of closing stores part refrigerant, the reliability of compressor can be made to be further improved.

The air-conditioning system proposed according to the embodiment of the present invention is described with reference to the accompanying drawings.

As shown in Figure 3, the air-conditioning system of the embodiment of the present invention comprises: off-premises station 301, multiple stage indoor set 302, first detection module 303, second detection module 304, the 3rd detection module 305, the 4th detection module (not indicating in figure) and controller 306.Wherein, off-premises station 301 comprises compressor 307 and condenser 308, and the outlet of compressor 307 is connected with the import of condenser 308 by a cross valve 309.Every platform indoor set in multiple stage indoor set 302 comprises evaporimeter 310, electric expansion valve 311 and magnetic valve 312, one end of electric expansion valve 311 is connected with the outlet of condenser 308, the other end of electric expansion valve 311 is connected with the import of evaporimeter 310, one end of magnetic valve 312 is connected with the outlet of evaporimeter 310, and the other end of magnetic valve 312 is connected with the import of compressor 307 by cross valve 309.First detection module 303 is for detecting the duty of the every platform indoor set in multiple stage indoor set.Second detection module 304 is for detecting the first temperature parameter of condenser 308.3rd detection module 305 is for detecting the second temperature parameter of evaporimeter 310.4th detection module is for detecting outdoor environment temperature and indoor environment temperature.Control module 306 is connected with the 4th detection module with electric expansion valve 311, magnetic valve 312, first detection module 303, second detection module 304, the 3rd detection module 305, control module 306, when at least one indoor set that first detection module 303 detects in multiple stage indoor set is closed, controls the electric expansion valve 311 of every platform indoor set and magnetic valve 312 to realize the control to the coolant quantity of air-conditioning system according to the first temperature parameter, the second temperature parameter, outdoor environment temperature and indoor environment temperature.

In one embodiment of the invention, as shown in Figure 4, the second detection module 304 comprises further: the first temperature sensor 401 and the second temperature sensor 402.Wherein, the first temperature sensor 401 can be arranged on condenser 308 middle part surface position, for detecting the internal temperature of condenser 308.Second temperature sensor 402 is for detecting the outlet temperature of condenser 308.The first temperature parameter that can be understood as condenser 308 comprises internal temperature and the outlet temperature of condenser 308.

In another embodiment of the present invention, as shown in Figure 4, the 3rd detection module 305 comprises further: three-temperature sensor 403, the 4th temperature sensor 404 and the 5th temperature sensor 405.Wherein, three-temperature sensor 403 can be arranged on the middle part surface position of evaporimeter 310, for detecting the internal temperature of evaporimeter 310.4th temperature sensor 404 is for detecting the outlet temperature of evaporimeter 310.5th temperature sensor 405 is for detecting the inlet temperature of evaporimeter 310.

The air-conditioning system course of work in cooling mode of the embodiment of the present invention will be described in detail below.

In one embodiment of the invention, when air-conditioning system is in refrigeration mode, control module 306 is according to outdoor environment temperature, the internal temperature of condenser 308 and outlet temperature, the outlet temperature of the evaporimeter 310 of the every platform indoor set in one or more indoor set opened calculates the degree of supercooling of condenser 308, the mean outlet temperature of the evaporimeter 310 of one or more indoor set of first temperature difference and unlatching, and the aperture controlling the electric expansion valve 311 of the every platform indoor set in one or more indoor set opened reaches the mean outlet temperature of one or more evaporimeter 310 of unlatching with the outlet temperature of the evaporimeter 310 making the every platform indoor set in one or more indoor set of unlatching, wherein first temperature difference is the outlet temperature of condenser 308 and the difference of outdoor environment temperature.Particularly, the internal temperature of condenser 308 is detected at the first temperature sensor 401, second temperature sensor 402 detects the outlet temperature of condenser 308, after 4th detection module detects outdoor environment temperature, such as, the internal temperature of condenser setting off-premises station is CM, the outlet temperature of condenser is CO, open in i-th indoor machine evaporation outlet temperature be EOi, outdoor environment temperature is T4.Control module 306 can calculate the degree of supercooling CA=CM-CO of condenser 308 according to CM, CO, CC and T4 of obtaining, first temperature difference CB=CO-T4, mean outlet temperature CC=(the EO1+EO2+......+EOi)/i of the evaporimeter 310 of one or more indoor set of unlatching.In addition, control module 306 is after the mean outlet temperature CC of the evaporimeter 310 of calculating acquisition degree of supercooling CA, first temperature difference CB of condenser 308, one or more indoor set of unlatching, and the aperture controlling the electric expansion valve 311 of the every platform indoor set in one or more indoor set opened reaches the mean outlet temperature of one or more evaporimeter 310 of unlatching with the outlet temperature of the evaporimeter 310 making the every platform indoor set in one or more indoor set of unlatching.Generally, when open in i-th indoor machine evaporation 310 outlet temperature be EOi be less than mean outlet temperature CC and the EOi<CC of the evaporimeter 310 of one or more indoor set of unlatching time, the aperture that control module 306 controls the electric expansion valve 311 of the evaporimeter 310 of one or more indoor set opened increases, otherwise then control module 306 controls the aperture reduction of the electric expansion valve 311 of the evaporimeter 310 of one or more indoor set opened.

In another embodiment of the present invention, the predetermined threshold value of degree of supercooling setting condenser 308 is CAS, the outlet temperature of condenser 308 and the first temperature threshold of outdoor environment temperature are CBS.When the degree of supercooling CA of condenser 308 is less than predetermined threshold value CAS and the first temperature difference CB is greater than the first temperature threshold CBS, namely as CA<CAS and CB>CBS time, the electric expansion valve 311 of any indoor set that control module 306 controls at least one the indoor set of closing is closed, and the magnetic valve 312 that the evaporimeter 310 controlling any indoor set at least one the indoor set of cutting out exports opens the first Preset Time such as Pc and cuts out after second, namely say, control module 306 evaporimeter 310 of any indoor set controlled at least one the indoor set of cutting out controls it after discharging refrigerant Pc second to be stopped, then, control module 306 judges whether CA<CAS and CB>CBS again, if, then repeat aforesaid operations, namely the electric expansion valve 311 of any indoor set that control module 306 controls at least one the indoor set of closing is closed, and the magnetic valve 312 that the evaporimeter 310 controlling any indoor set at least one the indoor set of cutting out exports opens the first Preset Time such as Pc and cuts out after second, circulation like this, until control module 306 judges not meet CA<CAS and CB>CBS, the magnetic valve 312 of the electric expansion valve 311 and evaporimeter 310 outlet that then control any indoor set at least one the indoor set of cutting out all cuts out.

In addition, in one embodiment of the invention, when the degree of supercooling CA of condenser 308 is greater than predetermined threshold value CAS and the first temperature difference CB is less than the first temperature threshold CBS, namely CA>CAS and CB<CBS time, the magnetic valve 312 that the evaporimeter 310 that control module 306 controls any indoor set at least one the indoor set of closing exports cuts out, and the electric expansion valve 311 controlling any indoor set at least one the indoor set of closing is closed after opening the second Preset Time such as Sc.Namely say, as CA>CAS and CB<CBS time, after control module 306 evaporimeter 310 of any indoor set controlled at least one the indoor set of cutting out absorbs the refrigerant Sc time, control it to stop, then, control module 306 judges whether CA>CAS and CB<CBS again, if, then repeat aforesaid operations, namely the magnetic valve 312 that the evaporimeter 310 that control module 306 controls any indoor set at least one the indoor set of closing exports cuts out, and the electric expansion valve 312 controlling any indoor set at least one the indoor set of closing is closed after opening the second Preset Time such as Sc, circulation like this, until control module 306 judges not meet CA>CAS and CB<CBS, the magnetic valve 312 of the electric expansion valve 311 and evaporimeter 310 outlet that then control any indoor set at least one the indoor set of cutting out all cuts out.

The following detailed description of the course of work of air-conditioning system when heating mode of the embodiment of the present invention.

In one embodiment of the invention, when air-conditioning system is in heating mode, control module 306 can also according to indoor environment temperature, the internal temperature of the evaporimeter 310 of the every platform indoor set in one or more indoor set opened and inlet temperature calculate the average internal temperature of the evaporimeter 310 of the every platform indoor set in one or more indoor set opened, second temperature difference and the 3rd temperature difference, and the aperture controlling the electric expansion valve 311 of the every platform indoor set in one or more indoor set opened reaches the average internal temperature of the evaporimeter 310 of the every platform indoor set in one or more indoor set of unlatching with the internal temperature of the evaporimeter 310 making the every platform indoor set in one or more indoor set of unlatching, wherein second temperature difference is the difference of the average inlet temperature of the evaporimeter 310 of the average internal temperature of evaporimeter 310 of every platform indoor set in one or more indoor set opened and the every platform indoor set in one or more indoor set of unlatching, 3rd temperature difference is the average inlet temperature of evaporimeter 310 of every platform indoor set in one or more indoor set opened and the difference of indoor environment temperature.Particularly, when three-temperature sensor 403 detects the internal temperature of evaporimeter 310, 4th temperature sensor 404 detects the outlet temperature of evaporimeter 310, after 5th temperature sensor 405 detects the inlet temperature of evaporimeter 310, such as, setting indoor environment temperature is T1, the internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set opened is EMi, inlet temperature is EIi, the average internal temperature HC=(EM1+EM2+...+EMi of the evaporimeter of the every platform indoor set in one or more indoor set then opened)/i, second temperature difference HA=HC-(EI1+EI2+...+EIi)/i, 3rd temperature difference is HB=(EI1+EI2+...+EIi)/i-T1.Calculate in control module 306 and obtain temperature parameter HC, HA, after HB, the aperture that control module 306 can control the electric expansion valve 311 of the every platform indoor set in one or more indoor set opened makes EMi=HC, generally, when the internal temperature of evaporimeter of the every platform indoor set in one or more indoor set opened be EMi be less than average internal temperature HC and the EMi<HC of the evaporimeter of the every platform indoor set in one or more indoor set of unlatching time, the aperture controlling the electric expansion valve of the every platform indoor set in one or more indoor set opened reduces, otherwise, the aperture controlling the electric expansion valve of the every platform indoor set in one or more indoor set opened increases.

In one embodiment of the invention, threshold value i.e. the second temperature threshold setting the second temperature difference HA is HAS, threshold value i.e. the 3rd temperature threshold of the 3rd temperature difference HB is HBS, when the second temperature difference HA is less than the second temperature threshold HAS and the 3rd temperature difference HB is greater than the 3rd temperature threshold HBS, namely as HA<HAS and HB>HBS time, the magnetic valve 312 that the evaporimeter 310 that control module 306 controls any indoor set at least one the indoor set of closing exports cuts out, and the electric expansion valve 311 controlling any indoor set at least one the indoor set of closing is closed after opening the 3rd Preset Time such as Ph.Namely say, as HA<HAS and HB>HBS time, the evaporimeter 310 of any indoor set at least one the indoor set of cutting out stops after discharging the refrigerant Ph time, then, control module 306 judges whether to meet HA<HAS and HB>HBS again, if, then repeat aforesaid operations, namely the magnetic valve 312 that the evaporimeter 310 that control module 306 controls any indoor set at least one the indoor set of closing exports cuts out, and the electric expansion valve 311 controlling any indoor set at least one the indoor set of closing is closed after opening the 3rd Preset Time such as Ph, until control module 306 judges not meet HA<HAS and HB>HBS, then control module 306 controls the electric expansion valve 311 of any indoor set at least one the indoor set of closing and magnetic valve 312 all cuts out.

In another embodiment of the present invention, when the second temperature difference HA is greater than the second temperature threshold HAS and the 3rd temperature difference HB is less than the 3rd temperature threshold HBS, namely as HA>HAS and HB<HBS time, the electric expansion valve 311 of any indoor set that control module 306 controls at least one the indoor set of closing is closed, and the magnetic valve 312 that the evaporimeter 310 controlling any indoor set at least one the indoor set of cutting out exports cuts out after opening the 4th Preset Time such as Sh.Namely say, as HA>HAS and HB<HBS time, control module 306 evaporimeter 310 of any indoor set controlled at least one the indoor set of cutting out stops after absorbing the refrigerant Sh time, then control module 306 judges whether HA>HAS and HB<HBS again, if, then repeat aforesaid operations, namely the electric expansion valve 311 of any indoor set that control module 306 controls at least one the indoor set of closing is closed, and the magnetic valve 312 that the evaporimeter 310 controlling any indoor set at least one the indoor set of cutting out exports cuts out after opening the 4th Preset Time such as Sh, until control module 306 judges not meet HA>HAS and HB<HBS, the magnetic valve 312 that the evaporimeter 310 that then control module 306 controls any indoor set at least one the indoor set of closing exports and electric expansion valve 311 are all closed.

In addition, in one embodiment of the invention, the scope of predetermined threshold value and CAS can be 0 ~ 15 DEG C, and the scope of the first temperature threshold and CBS can be 0 ~ 10 DEG C, and the scope of the first Preset Time Pc and the second Preset Time Sc can be 0 ~ 5 second.CAS, CBS, Pc and Sc are specifically determined after can being optimized by debugging according to concrete hardware or concrete condition.

In another embodiment of the present invention, the scope of the second temperature threshold HAS can be 0 ~ 20 DEG C, and the scope of the 3rd temperature threshold HBS can be 0 ~ 15 DEG C, and the scope of the 3rd Preset Time Ph and the 4th Preset Time Sh can be 0 ~ 5 second.HAS, HBS, Ph and Sh specifically can determine after debugging according to concrete hardware or concrete condition.

In sum, according to the air-conditioning system of the embodiment of the present invention, control module controls the electric expansion valve of at least one indoor set and the opening and closing of magnetic valve of closedown according to each temperature parameter, namely at least one the indoor set by closing stores or release refrigerant regulates the indoor set of unlatching and the coolant quantity of off-premises station, and Performance for Air Conditioning Systems can be made to reach optimization.In addition, at least one the indoor set controlling to close by control module stores part refrigerant, and the reliability of compressor can be made to be further improved.

Describe and can be understood in flow chart or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiments of the invention person of ordinary skill in the field.

In flow charts represent or in this logic otherwise described and/or step, such as, the sequencing list of the executable instruction for realizing logic function can be considered to, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as computer based system, comprise the system of processor or other can from instruction execution system, device or equipment instruction fetch and perform the system of instruction) use, or to use in conjunction with these instruction execution systems, device or equipment.With regard to this description, " computer-readable medium " can be anyly can to comprise, store, communicate, propagate or transmission procedure for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically (non-exhaustive list) of computer-readable medium comprises following: the electrical connection section (electronic installation) with one or more wiring, portable computer diskette box (magnetic device), random-access memory (ram), read-only storage (ROM), erasablely edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk read-only storage (CDROM).In addition, computer-readable medium can be even paper or other suitable media that can print described program thereon, because can such as by carrying out optical scanner to paper or other media, then carry out editing, decipher or carry out process with other suitable methods if desired and electronically obtain described program, be then stored in computer storage.

Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the special IC of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.

Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.

The above-mentioned storage medium mentioned can be read-only storage, disk or CD etc.

In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.

Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.

Claims (14)

1. the control method for the coolant quantity of air-conditioning system, it is characterized in that, described air-conditioning system comprises an off-premises station and multiple stage indoor set, a described off-premises station has condenser and every platform indoor set in described multiple stage indoor set has evaporimeter, electric expansion valve and magnetic valve, magnetic valve in described every platform indoor set is arranged in the outlet of the evaporimeter of described every platform indoor set, and described control method comprises the steps:

Detect the duty of the every platform indoor set in described multiple stage indoor set;

When at least one indoor set in described multiple stage indoor set is closed, detect the first temperature parameter of described condenser and the second temperature parameter of the evaporimeter of the every platform indoor set in one or more indoor set of detection unlatching, and detect outdoor environment temperature and indoor environment temperature, wherein, described first temperature parameter comprises internal temperature and the outlet temperature of described condenser, and described second temperature parameter comprises the internal temperature of evaporimeter, outlet temperature and inlet temperature;

The electric expansion valve of described every platform indoor set and magnetic valve is controlled to realize the control to the coolant quantity of described air-conditioning system according to described first temperature parameter, described second temperature parameter, described outdoor environment temperature and described indoor environment temperature.

2., as claimed in claim 1 for the control method of the coolant quantity of air-conditioning system, it is characterized in that, when described air-conditioning system is in refrigeration mode, the electric expansion valve and the magnetic valve that control described every platform indoor set specifically comprise:

Calculate the mean outlet temperature of evaporimeter of one or more indoor set of the degree of supercooling of described condenser, first temperature difference and described unlatching according to the outlet temperature of the evaporimeter of the every platform indoor set in one or more indoor set of the internal temperature of described outdoor environment temperature, described condenser and outlet temperature, described unlatching, wherein said first temperature difference is the outlet temperature of described condenser and the difference of described outdoor environment temperature;

The aperture controlling the electric expansion valve of the every platform indoor set in one or more indoor set of described unlatching reaches the mean outlet temperature of one or more evaporimeter of described unlatching with the outlet temperature of the evaporimeter making the every platform indoor set in one or more indoor set of described unlatching;

When the degree of supercooling of described condenser is less than predetermined threshold value and described first temperature difference is greater than the first temperature threshold, the electric expansion valve controlling any indoor set at least one the indoor set of closing is closed, and the magnetic valve controlling the evaporator outlet of any indoor set at least one indoor set of described cut out cuts out after opening the first Preset Time;

When the degree of supercooling of described condenser is greater than described predetermined threshold value and described first temperature difference is less than described first temperature threshold, control the closed electromagnetic valve of the evaporator outlet of any indoor set at least one indoor set of described closedown, and the electric expansion valve controlling any indoor set at least one indoor set of described closedown is closed after opening the second Preset Time.

3., as claimed in claim 1 for the control method of the coolant quantity of air-conditioning system, it is characterized in that, when described air-conditioning system is in heating mode, the electric expansion valve and the magnetic valve that control described every platform indoor set specifically comprise:

According to described indoor environment temperature, the internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set opened and inlet temperature calculate the average internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set of described unlatching, second temperature difference and the 3rd temperature difference, wherein said second temperature difference is the difference of the average inlet temperature of the evaporimeter of every platform indoor set in the average internal temperature of evaporimeter of every platform indoor set in one or more indoor set of described unlatching and one or more indoor set of described unlatching, described 3rd temperature difference is the average inlet temperature of evaporimeter and the difference of described indoor environment temperature of every platform indoor set in one or more indoor set of described unlatching,

The aperture controlling the electric expansion valve of the every platform indoor set in one or more indoor set of described unlatching reaches the average internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set of described unlatching with the internal temperature of the evaporimeter making the every platform indoor set in one or more indoor set of described unlatching;

When described second temperature difference is less than the second temperature threshold and described 3rd temperature difference is greater than the 3rd temperature threshold, control the closed electromagnetic valve of the evaporator outlet of any indoor set at least one the indoor set of closing, and the electric expansion valve controlling any indoor set at least one indoor set of described closedown is closed after opening the 3rd Preset Time;

When described second temperature difference is greater than described second temperature threshold and described 3rd temperature difference is less than the 3rd temperature threshold, the electric expansion valve controlling any indoor set at least one indoor set of described closedown is closed, and the magnetic valve controlling the evaporator outlet of any indoor set at least one indoor set of described cut out cuts out after opening the 4th Preset Time.

4. an air-conditioning system, is characterized in that, comprising:

Off-premises station, described off-premises station comprises compressor and condenser, and the outlet of described compressor is connected with the import of described condenser by a cross valve;

Multiple stage indoor set, every platform indoor set in described multiple stage indoor set comprises evaporimeter, electric expansion valve and magnetic valve, one end of described electric expansion valve is connected with the outlet of described condenser, the other end of described electric expansion valve is connected with the import of described evaporimeter, one end of described magnetic valve is connected with the outlet of described evaporimeter, and the other end of described magnetic valve is connected by the import of described cross valve with described compressor;

For detecting the first detection module of the duty of the every platform indoor set in described multiple stage indoor set;

For detecting the second detection module of the first temperature parameter of described condenser and the 3rd detection module for the second temperature parameter of detecting described evaporimeter, wherein, described first temperature parameter comprises internal temperature and the outlet temperature of described condenser, and described second temperature parameter comprises the internal temperature of evaporimeter, outlet temperature and inlet temperature;

For detecting the 4th detection module of outdoor environment temperature and indoor environment temperature;

Control module, described control module and described electric expansion valve, described magnetic valve, described first detection module, described second detection module, described 3rd detection module is connected with described 4th detection module, described control module is when at least one the indoor set that described first detection module detects in described multiple stage indoor set is closed, according to described first temperature parameter, described second temperature parameter, the electric expansion valve of described outdoor environment temperature and the described every platform indoor set of described indoor environment temperature control and magnetic valve are to realize the control to the coolant quantity of described air-conditioning system.

5. air-conditioning system as claimed in claim 4, it is characterized in that, described second detection module comprises further:

First temperature sensor, for detecting the internal temperature of described condenser;

Second temperature sensor, for detecting the outlet temperature of described condenser.

6. air-conditioning system as claimed in claim 5, it is characterized in that, described 3rd detection module comprises further:

Three-temperature sensor, for detecting the internal temperature of described evaporimeter;

4th temperature sensor, for detecting the outlet temperature of described evaporimeter;

5th temperature sensor, for detecting the inlet temperature of described evaporimeter.

7. air-conditioning system as claimed in claim 6, it is characterized in that, when described air-conditioning system is in refrigeration mode, described control module is according to described outdoor environment temperature, the internal temperature of described condenser and outlet temperature, the outlet temperature of the evaporimeter of the every platform indoor set in one or more indoor set opened calculates the degree of supercooling of described condenser, the mean outlet temperature of the evaporimeter of one or more indoor set of first temperature difference and described unlatching, and the aperture controlling the electric expansion valve of the every platform indoor set in one or more indoor set of described unlatching reaches the mean outlet temperature of one or more evaporimeter of described unlatching with the outlet temperature of the evaporimeter making the every platform indoor set in one or more indoor set of described unlatching, wherein said first temperature difference is the outlet temperature of described condenser and the difference of described outdoor environment temperature.

8. air-conditioning system as claimed in claim 7, it is characterized in that, described control module also for be less than predetermined threshold value in the degree of supercooling of described condenser and described first temperature difference is greater than the first temperature threshold time control any indoor set at least one the indoor set of closing electric expansion valve close, and the magnetic valve controlling the evaporator outlet of any indoor set at least one indoor set of described cut out cuts out after opening the first Preset Time.

9. air-conditioning system as claimed in claim 7, it is characterized in that, described control module also for be greater than predetermined threshold value in the degree of supercooling of described condenser and described first temperature difference is less than the first temperature threshold time control the closed electromagnetic valve of the evaporator outlet of any indoor set at least one the indoor set of closing, and the electric expansion valve controlling any indoor set at least one indoor set of described closedown is closed after opening the second Preset Time.

10. air-conditioning system as claimed in claim 6, it is characterized in that, when described air-conditioning system is in heating mode, described control module is also according to described indoor environment temperature, the internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set opened and inlet temperature calculate the average internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set of described unlatching, second temperature difference and the 3rd temperature difference, and the aperture controlling the electric expansion valve of the every platform indoor set in one or more indoor set of described unlatching reaches the average internal temperature of the evaporimeter of the every platform indoor set in one or more indoor set of described unlatching with the internal temperature of the evaporimeter making the every platform indoor set in one or more indoor set of described unlatching, wherein said second temperature difference is the difference of the average inlet temperature of the evaporimeter of every platform indoor set in the average internal temperature of evaporimeter of every platform indoor set in one or more indoor set of described unlatching and one or more indoor set of described unlatching, described 3rd temperature difference is the average inlet temperature of evaporimeter and the difference of described indoor environment temperature of every platform indoor set in one or more indoor set of described unlatching.

11. air-conditioning systems as claimed in claim 10, it is characterized in that, described control module also for be less than the second temperature threshold in described second temperature difference and described 3rd temperature difference is greater than the 3rd temperature threshold time, control the closed electromagnetic valve of the evaporator outlet of any indoor set at least one the indoor set of closing, and the electric expansion valve controlling any indoor set at least one indoor set of described closedown is closed after opening the 3rd Preset Time.

12. air-conditioning systems as claimed in claim 10, it is characterized in that, described control module also for be greater than the second temperature threshold in described second temperature difference and described 3rd temperature difference is less than the 3rd temperature threshold time, the electric expansion valve controlling any indoor set at least one the indoor set of closing is closed, and the magnetic valve controlling the evaporator outlet of any indoor set at least one indoor set of described cut out cuts out after opening the 4th Preset Time.

13. air-conditioning systems as claimed in claim 8 or 9, it is characterized in that, the scope of described predetermined threshold value is 0 ~ 15 DEG C, the scope of described first temperature threshold is 0 ~ 10 DEG C, and the scope of the first Preset Time and the second Preset Time is 0 ~ 5 second.

14. air-conditioning systems as described in claim 11 or 12, it is characterized in that, the scope of described second temperature threshold is 0 ~ 20 DEG C, and the scope of described 3rd temperature threshold is 0 ~ 15 DEG C, and the scope of the 3rd Preset Time and the 4th Preset Time is 0 ~ 5 second.