CN104791945A

CN104791945A - Air conditioner system, control method of air conditioner system and outdoor unit of air conditioner system

Info

Publication number: CN104791945A
Application number: CN201410028569.9A
Authority: CN
Inventors: 罗彬�; 魏富党
Original assignee: Midea Group Co Ltd; Guangdong Midea HVAC Equipment Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea HVAC Equipment Co Ltd
Priority date: 2014-01-21
Filing date: 2014-01-21
Publication date: 2015-07-22
Anticipated expiration: 2034-01-21
Also published as: CN104791945B

Abstract

The invention discloses a control method of the air conditioner system. The control method comprises the following steps of obtaining a work mode of the air conditioner system, and according to the work mode, starting an inverter compressor of the outdoor unit of the air conditioner system; obtaining a target refrigerant saturation temperature; according to the target refrigerant saturation temperature, frequency converting control over the inverter compressor is carried out; in the process of carrying out frequency converting control over the inverter compressor, obtaining operating time and the operating frequency or operating current of the inverter compressor; and according to the operating time and the operating frequency or operating current of the inverter compressor, adjusting the target refrigerant saturation temperature. According to the control method of the air conditioner system, the air conditioner system can be independent of the outdoor unit so as to carry out frequency converting control over the inverter compressor of the outdoor unit, a process of controlling parameter transmission is reduced, the complexity of the air conditioner system is reduced, and operating reliability of the air conditioner system is improved. The invention further discloses the outdoor unit of the air conditioner and the air conditioner system with the outdoor unit.

Description

The off-premises station of air-conditioning system and control method thereof, air-conditioning system

Technical field

The present invention relates to air-conditioning technical field, particularly a kind of air conditioner system control method and a kind of air-conditioning system off-premises station and there is the air-conditioning system of this off-premises station.

Background technology

Along with the development of air-conditioning technical, DC frequency converting air-conditioner is more and more subject to the welcome in market, and its sales volume is also in fast lifting.At present, the convertible frequency air-conditioner on market all needs supporting installation, and indoor set, off-premises station need special supporting communication modes to realize controlling the compressor of off-premises station.Therefore, indoor set, off-premises station installation must ensure synchronous, supporting.

The framework of existing frequency-conversion air-conditioning system as shown in Figure 1A, off-premises station must receive in the course of the work the indoor set of the specific transmission rule sent from indoor set a series of signal such as switching on and shutting down, temperature setting, indoor temperature or by the signal after indoor set process, thus the compressor that could realize controlling off-premises station runs with specific frequency, and regulate the running frequency of compressor according to indoor change at any time.In prior art, need indoor set to send corresponding signal to off-premises station, just can complete the control to all parts in off-premises station, make the structure of air-conditioning system very complicated, with high costs.Therefore, existing air-conditioning system needs to improve.

Summary of the invention

Object of the present invention is intended at least solve above-mentioned technological deficiency.

For this reason, first object of the present invention is to propose a kind of air conditioner system control method, this air conditioner system control method can carry out VFC independent of indoor set to the frequency-changeable compressor of off-premises station, decrease controling parameters transmitting procedure, reduce the complexity of air-conditioning system, improve air-conditioning system operational reliability.

Second object of the present invention is the off-premises station proposing a kind of air-conditioning system.3rd object of the present invention is to propose a kind of air-conditioning system.

For achieving the above object, a kind of air conditioner system control method that first aspect present invention embodiment proposes, comprises the following steps: the mode of operation obtaining air-conditioning system, and starts the frequency-changeable compressor of the off-premises station of described air-conditioning system according to described mode of operation; Obtain target refrigerant saturation temperature; According to described target refrigerant saturation temperature, VFC is carried out to described frequency-changeable compressor; To in the VFC process of described frequency-changeable compressor, obtain the running time of described frequency-changeable compressor and the running frequency of described frequency-changeable compressor or running current; And according to the running time of described frequency-changeable compressor and the running frequency of described frequency-changeable compressor or running current, described target refrigerant saturation temperature is adjusted.

According to the air conditioner system control method of the embodiment of the present invention, by obtaining target refrigerant saturation temperature, VFC is carried out to the frequency-changeable compressor of off-premises station, and in the control procedure of frequency-changeable compressor, according to the running frequency of frequency-changeable compressor obtained or running current and running time adjustment aim refrigerant saturation temperature, realize carrying out VFC independent of indoor set to frequency-changeable compressor, specific communication is carried out to transmit corresponding controling parameters without the need to indoor set and off-premises station, decrease controling parameters transmitting procedure, reduce the complexity of air-conditioning system, improve air-conditioning system operational reliability.Further, the ability of air-conditioning system is made to be played in time.

According to one embodiment of present invention, switching on and shutting down instruction and the mode selection command of remote controller, line control machine or indoor set transmission is received by the communicator of described off-premises station, to obtain the mode of operation of described air-conditioning system.

According to one embodiment of present invention, also comprise: when shutting down, using the described target refrigerant saturation temperature after adjustment as target refrigerant saturation temperature during described off-premises station start next time.

According to one embodiment of present invention, the running frequency of the described running time according to described frequency-changeable compressor and described frequency-changeable compressor or running current adjust described target refrigerant saturation temperature and comprise further: judge whether the running time of described frequency-changeable compressor is more than or equal to the 4th time threshold; If judge to be more than or equal to described 4th time threshold the running time of described frequency-changeable compressor, then obtain the current operation frequency of described frequency-changeable compressor or current running current; Judge whether the current operation frequency of described frequency-changeable compressor is more than or equal to predeterminated frequency threshold value, or whether the current running current of described frequency-changeable compressor is more than or equal to predetermined current threshold; If the current operation frequency of described frequency-changeable compressor is more than or equal to described predeterminated frequency threshold value, or the current running current of described frequency-changeable compressor is more than or equal to predetermined current threshold, then adjust described target refrigerant saturation temperature according to default step-length.

Wherein, when described mode of operation is heating mode, increases described target refrigerant saturation temperature according to described default step-length, and the running time of described frequency-changeable compressor is returned 0; When described mode of operation is refrigeration mode, reduces described target refrigerant saturation temperature according to described default step-length, and the running time of described frequency-changeable compressor is returned 0.

According to one embodiment of present invention, described acquisition target refrigerant saturation temperature comprises further: if when described off-premises station starts for the first time within the default work period, then detect the current environmental temperature of described off-premises station; And determine described target refrigerant saturation temperature according to the current environmental temperature of described off-premises station.

According to one embodiment of present invention, when described mode of operation is refrigeration mode, obtain the first pressure detecting signal by the first pressure sensor being arranged on described frequency-changeable compressor porch.

According to one embodiment of present invention, when described mode of operation is heating mode, obtain the second pressure detecting signal by the second pressure sensor being arranged on described frequency-changeable compressor exit.

According to one embodiment of present invention, according to described target refrigerant saturation temperature, VFC is carried out to described frequency-changeable compressor, comprise further: select one of described first pressure detecting signal and the second pressure detecting signal to generate current refrigerant saturation temperature according to described mode of operation; And according to described current refrigerant saturation temperature and described target refrigerant saturation temperature, VFC is carried out to described frequency-changeable compressor.

According to one embodiment of present invention, also comprise: after the switching on and shutting down instruction receiving described off-premises station, control described off-premises station and postpone Preset Time start or shutdown.

For achieving the above object, the off-premises station of a kind of air-conditioning system that second aspect present invention embodiment proposes, comprising: frequency-changeable compressor; Controller, described controller is used for controlling described frequency-changeable compressor, described controller comprises: starting module, for obtaining the mode of operation of air-conditioning system, and starting the frequency-changeable compressor of the off-premises station of described air-conditioning system according to the mode of operation of described air-conditioning system; Target refrigerant saturation temperature control module, for obtaining target refrigerant saturation temperature, and in the VFC process of described frequency-changeable compressor, obtain the running time of described frequency-changeable compressor and the running frequency of described frequency-changeable compressor or running current, and according to the running time of described frequency-changeable compressor and the running frequency of described frequency-changeable compressor or running current, described target refrigerant saturation temperature is adjusted; VFC module, for carrying out VFC according to described target refrigerant saturation temperature to described frequency-changeable compressor.

According to the off-premises station of the air-conditioning system of the embodiment of the present invention, by obtaining target refrigerant saturation temperature, VFC is carried out to frequency-changeable compressor, and in the control procedure of frequency-changeable compressor, according to the running frequency of frequency-changeable compressor obtained or running current and running time adjustment aim refrigerant saturation temperature, therefore can obtain without the need to carrying out particular communication with indoor set the controling parameters that frequency-changeable compressor is controlled, realize carrying out VFC to frequency-changeable compressor, the structure of air-conditioning system is made to become simpler, greatly reduce cost, and the ability of air-conditioning system is played in time.

According to one embodiment of present invention, described target refrigerant saturation temperature control module, target refrigerant saturation temperature time also for the described target refrigerant saturation temperature after adjustment being started shooting as described off-premises station is next when shutting down.

According to one embodiment of present invention, when being more than or equal to the 4th time threshold the running time of described frequency-changeable compressor, and the current running current that the current operation frequency of described frequency-changeable compressor is more than or equal to predeterminated frequency threshold value or described frequency-changeable compressor is when being more than or equal to predetermined current threshold, described target refrigerant saturation temperature control module adjusts described target refrigerant saturation temperature according to default step-length.

Wherein, when described mode of operation is heating mode, described target refrigerant saturation temperature control module increases described target refrigerant saturation temperature according to described default step-length, and the running time of described frequency-changeable compressor is returned 0; Described target refrigerant saturation temperature control module, when described mode of operation is refrigeration mode, reduces described target refrigerant saturation temperature according to described default step-length, and the running time of described frequency-changeable compressor is returned 0.

According to one embodiment of present invention, also comprise: temperature sensor, described temperature sensor detects the current environmental temperature of environment residing for described off-premises station, wherein, if when described off-premises station starts for the first time within the default work period, described target refrigerant saturation temperature control module determines described target refrigerant saturation temperature according to the current environmental temperature of described off-premises station.

According to one embodiment of present invention, also comprise: the first pressure sensor being arranged on described frequency-changeable compressor porch, described first pressure sensor generates the first pressure detecting signal when described mode of operation is refrigeration mode.

According to one embodiment of present invention, also comprise: the second pressure sensor being arranged on described frequency-changeable compressor exit, described second pressure sensor generates the second pressure detecting signal when described mode of operation is heating mode.

According to one embodiment of present invention, described target refrigerant saturation temperature control module selects one of described first pressure detecting signal and the second pressure detecting signal to generate current refrigerant saturation temperature according to described mode of operation, and obtaining target refrigerant saturation temperature, described VFC module carries out VFC according to described current refrigerant saturation temperature, described target refrigerant saturation temperature to described frequency-changeable compressor.

For achieving the above object, third aspect present invention embodiment proposes a kind of air-conditioning system, and it comprises the off-premises station of the air-conditioning system that second aspect present invention embodiment proposes.

According to the air-conditioning system of the embodiment of the present invention, off-premises station carries out VFC according to the operational factor of frequency-changeable compressor to frequency-changeable compressor, carry out particular communication without the need to indoor set or without the need to off-premises station and indoor set and obtain controling parameters, make the structure of air-conditioning system become more simple, greatly reduce cost.

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:

Figure 1A is the Organization Chart of existing frequency-conversion air-conditioning system;

Figure 1B is the Organization Chart of air-conditioning system according to an embodiment of the invention;

Fig. 2 is the Organization Chart of air-conditioning system in accordance with another embodiment of the present invention;

Fig. 3 is the control logic schematic diagram of the air-conditioning system according to embodiment 1;

Fig. 4 is the control logic schematic diagram of the air-conditioning system according to embodiment 2;

Fig. 5 is the flow chart of the air conditioner system control method according to the embodiment of the present invention;

Fig. 6 is the flow chart of air conditioner system control method according to an embodiment of the invention; And

Fig. 7 is the block diagram of the off-premises station of air-conditioning system according to the embodiment of the present invention.

Reference numeral:

Indoor set 1: interior machine control signal receiver module 11, interior machine control processor 12, signal transmission module 13, indoor fan 14 and indoor choke valve 15;

Off-premises station 2: frequency-changeable compressor Mc and controller 21, communicator 22, the first pressure sensor 23, second pressure sensor 24, temperature sensor 25, outer blower fan Mf, outer expansion valve Ev, outer cross valve SV and outer machine system protection sensor 26, systematic parameter acquisition module 27;

Remote controller 3;

Line control machine 4;

Controller 21: compressor output frequency control module 211(VFC module 203), blower fan output control module 212, outer expansion valve output control module 213 and outer cross valve output control module 214, start module 201, target refrigerant saturation temperature control module 202.

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.

The off-premises station of air-conditioning system, air conditioner system control method and the air-conditioning system proposed according to the embodiment of the present invention is described with reference to the accompanying drawings.

First, the air-conditioning system of embodiment proposition with reference to the accompanying drawings to describe the present invention.

Figure 1B is the Organization Chart of air-conditioning system according to an embodiment of the invention.As shown in Figure 1B, this air-conditioning system comprises indoor set 1 and off-premises station 2.

Wherein, off-premises station 2 comprises frequency-changeable compressor Mc and controller 21, and controller 21 is according to the operational factor of frequency-changeable compressor Mc and carry out VFC independent of indoor set 1 to frequency-changeable compressor Mc.

And, off-premises station 2 also comprises communicator 22, communicator 22 is for receiving the switching on and shutting down instruction and mode selection command that remote controller 3, line control machine 4 directly send or indoor set 1 sends, wherein, controller 21 carries out VFC according to the operational factor of frequency-changeable compressor Mc and mode of operation corresponding to mode selection command to frequency-changeable compressor Mc.Particularly, as shown in Figure 1B, communicator 22 is signal receiving module, and only received the switching on and shutting down command control signal and mode selection command control signal that directly send from remote controller 3, line control machine 4 by control signal receiver module, or received the switching on and shutting down command control signal and mode selection command control signal that send from indoor set 1 by control signal receiver module.

As shown in Figure 1B, indoor set 1 comprises the major electrical equipment parts such as interior machine control signal receiver module 11, interior machine control processor 12, signal transmission module 13, indoor fan 14 and indoor choke valve 15.Indoor fan 14 and indoor choke valve 15 are controlled by interior machine control processor 12, and switching on and shutting down command control signal and mode selection command control signal are transferred to the control signal receiver module of communicator 22 with general transmission rule by signal transmission module 13 by indoor set 1.Wherein, switching on and shutting down command control signal and mode selection command control signal directly can be sent to the communicator 22 in off-premises station 2 by indoor set 1.Or, indoor set 1 receives the switching on and shutting down command control signal and mode selection command control signal that send from remote controller 3, line control machine 4 by interior machine control signal receiver module 11, then switching on and shutting down command control signal and mode selection command control signal are transmitted to the control signal receiver module of communicator 22 with general transmission rule by signal transmission module 13 by indoor set 1.

In an embodiment of the present invention, this air-conditioning system controls start and stop and the model selection of off-premises station according to switching on and shutting down command control signal and mode selection command control signal.

As shown in Figure 1B, off-premises station 2 also comprises the first pressure sensor 23, first pressure sensor 23 being arranged on frequency-changeable compressor Mc porch and generates the first pressure detecting signal when mode of operation is refrigeration mode.Wherein, when air-conditioning system is single cooler, the first pressure sensor 23 only need be set at the muffler place of frequency-changeable compressor Mc to detect frequency-changeable compressor Mc return-air low-pressure lateral pressure when air-conditioning system is freezed.

In another embodiment of the present invention, as shown in Figure 2, off-premises station 2 also comprises the second pressure sensor 24, second pressure sensor 24 being arranged on frequency-changeable compressor Mc exit and generates the second pressure detecting signal when mode of operation is heating mode.That is, when air-conditioning system is air conditioner, the second pressure sensor 24 also need be set at the blast pipe place of frequency-changeable compressor Mc and be vented high side pressure to detect frequency-changeable compressor Mc when air-conditioning system heats.Certainly, also can assemble a pressure sensor after cross valve, be low-pressure lateral pressure during refrigeration, basic suitable with back pressure.High side pressure when heating, basic suitable with pressure at expulsion.

Wherein, controller 21 selects one of the first pressure detecting signal and the second pressure detecting signal to generate current refrigerant saturation temperature according to mode of operation, and obtain target refrigerant saturation temperature, and according to current refrigerant saturation temperature, target refrigerant saturation temperature, VFC is carried out to frequency-changeable compressor Mc, wherein, to in the VFC process of frequency-changeable compressor Mc, controller 21 adjusts target refrigerant saturation temperature according to the operational factor of frequency-changeable compressor Mc.In an embodiment of the present invention, controller 21 shut down time, using adjustment after target refrigerant saturation temperature as off-premises station 2 next time start time initial target refrigerant saturation temperature.

And, as shown in Figure 1B or Fig. 2, off-premises station 2 also comprises temperature sensor 25, temperature sensor 25 detects the current environmental temperature of environment residing for off-premises station 2, wherein, if when off-premises station 2 starts for the first time within the default work period, controller 21 is according to the current environmental temperature determination target refrigerant saturation temperature of off-premises station 2.It should be noted that, the default work period should make broad understanding, can be several years, also can be some months.Such as, when off-premises station 2 is after closing summer, until just open again winter, at this moment if when the winter after some months, first time started, controller 21 is according to the current environmental temperature determination target refrigerant saturation temperature of off-premises station 2, instead of the target refrigerant saturation temperature after the adjustment of recording during last shutdown (summer a few months ago).

In addition; as shown in Figure 1B or Fig. 2; off-premises station 2 also comprises outer blower fan Mf, outer expansion valve Ev, outer cross valve SV and outer machine system protection sensor 26, systematic parameter acquisition module 27; systematic parameter acquisition module 27 is connected between each sensor and controller 21, sends to controller 21 after the parameter that the first pressure sensor 23, second pressure sensor 24 and temperature sensor 25, outer machine system protection sensor 26 gather being processed.Wherein, controller 21 comprises compressor output frequency control module 211, blower fan output control module 212, outer expansion valve output control module 213 and outer cross valve output control module 214, and the collection signal that compressor output frequency control module 211, blower fan output control module 212, outer expansion valve output control module 213 and outer cross valve output control module 214 export according to systematic parameter acquisition module 27 respectively realizes frequency-changeable compressor Mc, outer blower fan Mf, outer expansion valve Ev and the corresponding control of outer cross valve SV.

In one embodiment of the invention, the operational factor of frequency-changeable compressor comprises the running time of frequency-changeable compressor and the running frequency of frequency-changeable compressor or running current, wherein be more than or equal to the 4th time threshold in the running time of frequency-changeable compressor, and the current running current that the current operation frequency of frequency-changeable compressor is more than or equal to predeterminated frequency threshold value or frequency-changeable compressor is when being more than or equal to predetermined current threshold, controller is according to default step-length adjustment aim refrigerant saturation temperature.

Specifically, the control procedure of the air-conditioning system of the embodiment of the present invention is described below respectively in detail with two embodiments of heating mode and refrigeration mode.

[embodiment 1]

As shown in Figure 3, in cooling mode, off-premises station 2 is configured with the first pressure sensor 23 refrigerant low-pressure lateral pressure value being detected, off-premises station 2 is according to the mode selection command control signal received and switching on and shutting down command control signal refrigerating operaton.

And, if indoor set is first time startup in the default work period, controller is then according to the current environmental temperature determination target refrigerant saturation temperature Tes of off-premises station, such as, outdoor environment temperature is between 30-35 DEG C, and the initial target refrigerant saturation temperature determined is 6 DEG C, outdoor environment temperature is between 35-40 DEG C, the initial target refrigerant saturation temperature determined is 3 DEG C, and outdoor environment temperature is between 25-30 DEG C, and the initial target refrigerant saturation temperature determined is 8 DEG C.If indoor set is not first time startup in the default work period, the initial target refrigerant saturation temperature when target refrigerant saturation temperature of record is started shooting as this when controller is then shut down according to the last time.

Then controller generates current refrigerant saturation temperature Te according to the first pressure detecting signal that the first pressure sensor 23 generates, and then constantly carries out PID adjustment according to target refrigerant saturation temperature Tes to current refrigerant saturation temperature Te.Wherein, PID is controlled to be described as follows:

The deviate △ e=Te-Tes(such as current Te=10 of current refrigerant saturation temperature Te and target refrigerant saturation temperature Tes, target Tes=6, so current △ e0=10-6=4), because chip image data is discrete, PID calculating is carried out, to draw the changing value of frequency-changeable compressor running frequency according to the difference of (such as before 40s) the △ e1 before certain hour and current △ e0 or the weighted value determination feedback quantity of △ e1 and △ e0.Wherein, compressor rotary speed=current rotating speed+compressor rotary speed variable quantity, and compressor rotary speed variable quantity=(Kp+Ki/s+Kd*s) * E(△ e1, △ e0), wherein Kp, Ki, s, Kd are pre-set constant, △ e1, and △ e0 is the feedback variable of monitoring in real time.

In the present embodiment, after being more than or equal to the 4th time threshold such as certain hour E minute (30 minutes) running time of frequency-changeable compressor, controller compares to judge whether to need to revise target refrigerant saturation temperature Tes to the current operation frequency of frequency-changeable compressor and predeterminated frequency threshold value such as F hertz, or controller compares to judge whether to need to revise target refrigerant saturation temperature Tes to the current running current of frequency-changeable compressor and predetermined current threshold.

After frequency-changeable compressor runs E minute, and the current running current that the current operation frequency of frequency-changeable compressor is more than or equal to F hertz or frequency-changeable compressor is more than or equal to predetermined current threshold, can judge that the indoor cooling load of air-conditioning system is larger, controller is according to default step-length adjustment aim refrigerant saturation temperature Tes, i.e. continuous downward revision target refrigerant saturation temperature Tes, such as adjust Tes=Tes-1, more fresh target refrigerant saturation temperature Tes, the running time of described frequency-changeable compressor is returned 0 simultaneously, restart timing, with the target refrigerant saturation temperature Tes upgraded, constantly PID adjustment is carried out to current refrigerant saturation temperature Te, make frequency-changeable compressor improve rotating speed and reduce suction pressure, indoor temperature is made to reach setting target.Meanwhile, record current goal refrigerant saturation temperature, can as the initial target refrigerant saturation temperature of starting shooting next time.

Therefore, the situation that the air-conditioning system of the embodiment of the present invention can affect refrigeration system operational factor according to system chambers internal loading situation carries out identifying and judging, thus adjust the running frequency of frequency-changeable compressor intelligently, the ability of air-conditioning system is played in time, reaches design temperature requirement.

[embodiment 2]

As shown in Figure 4, in a heating mode, off-premises station 2 is configured with the second pressure sensor 24 refrigerant high side pressure value being detected, off-premises station 2 is according to the mode selection command control signal received and switching on and shutting down command control signal heating operation.

And, if indoor set be in the default work period first time start, controller then according to the current environmental temperature determination target refrigerant saturation temperature Tcs of off-premises station, such as, outdoor environment temperature is between 7-10 DEG C, and the initial target refrigerant saturation temperature determined is 46 DEG C.If indoor set is not first time startup in the default work period, the initial target refrigerant saturation temperature when target refrigerant saturation temperature of record is started shooting as this when controller is then shut down according to the last time.

Then controller generates current refrigerant saturation temperature Tc according to the second pressure detecting signal that the second pressure sensor 24 generates, and then constantly carries out PID adjustment according to target refrigerant saturation temperature Tcs to current refrigerant saturation temperature Tc.

In the present embodiment, after being more than or equal to the 4th time threshold such as certain hour E minute (30 minutes) running time of frequency-changeable compressor, controller compares to judge whether to need to revise target refrigerant saturation temperature Tcs to the current operation frequency of frequency-changeable compressor and predeterminated frequency threshold value such as F hertz, or controller compares to judge whether to need to revise target refrigerant saturation temperature Tcs to the current running current of frequency-changeable compressor and predetermined current threshold.

After frequency-changeable compressor runs E minute, and the current running current that the current operation frequency of frequency-changeable compressor is more than or equal to F hertz or frequency-changeable compressor is more than or equal to predetermined current threshold, can judge that the indoor heating load of air-conditioning system is larger, controller is according to default step-length adjustment aim refrigerant saturation temperature Tcs, i.e. continuous upwards revise goal refrigerant saturation temperature Tcs, such as adjust Tcs=Tcs+1, more fresh target refrigerant saturation temperature Tcs, the running time of described frequency-changeable compressor is returned 0 simultaneously, restart timing, with the target refrigerant saturation temperature Tcs upgraded, constantly PID adjustment is carried out to current refrigerant saturation temperature Tc, frequency-changeable compressor is made to improve rotating speed, improve high pressure discharge pressure as early as possible, indoor temperature is made to reach setting target.Meanwhile, record current goal refrigerant saturation temperature, can as the initial target refrigerant saturation temperature of starting shooting next time.

Therefore, the situation that the air-conditioning system of the embodiment of the present invention can affect heating operational factor according to system chambers internal loading situation carries out identifying and judging, thus adjust the running frequency of frequency-changeable compressor intelligently, the ability of air-conditioning system is played in time, reaches design temperature requirement.

In an embodiment of the present invention, air-conditioning system can be one-to-one system, also can be drag multisystem, and this air-conditioning system can be single cooler, also can be air conditioner.Wherein indoor set not by parameter communications such as indoor environment temperatures to off-premises station, and be only the start-stop that the startup-shutdown instruction of sending according to line control machine, remote controller or indoor set controls off-premises station.The air-conditioning system of the embodiment of the present invention can control frequency-changeable compressor under indoor set and off-premises station do not carry out the refrigeration of controling parameters communication and/or heating mode, the controller of off-premises station can complete the electric component controlling rapidly the off-premises stations such as frequency-changeable compressor by autonomous learning, thus indoor temperature is arrived and maintains design temperature.

According to embodiments of the invention, controller 21, when receiving machine open/close signal, carries out time delay certain hour such as S and processes second, to prevent client from selecting to cause off-premises station 2 to start running because of maloperation, avoids the controller of off-premises station to carry out false judgment.That is, controller, after receiving switching on and shutting down instruction, postpones Preset Time such as S and starts shooting or shut down second.

According to the air-conditioning system of the embodiment of the present invention, the controller of the off-premises station in air-conditioning system carries out VFC independent of indoor set to frequency-changeable compressor according to the operational factor of frequency-changeable compressor, specific communication is carried out to transmit corresponding controling parameters without the need to indoor set and off-premises station, make the structure of air-conditioning system become more simple, greatly reduce cost.

The air conditioner system control method proposed according to the embodiment of the present invention is described with reference to the accompanying drawings.

Fig. 5 is the flow chart of the air conditioner system control method according to the embodiment of the present invention.As shown in Figure 5, this air conditioner system control method comprises the following steps:

S1, obtains the operational factor of the frequency-changeable compressor of the off-premises station of air-conditioning system.

S2, utilizes the controller of off-premises station to carry out VFC independent of the indoor set of air-conditioning system to the frequency-changeable compressor of off-premises station according to the operational factor of frequency-changeable compressor.

That is, after startup air-conditioning system, first pressure sensor and/or second pressure sensor of off-premises station detect frequency-changeable compressor air inlet pressure force value and/or exhaust pressure value respectively, and temperature sensor detects the environment temperature around off-premises station, and send the frequency-changeable compressor air inlet pressure force value detected and/or exhaust pressure value and off-premises station environment temperature to systematic parameter acquisition module, the frequency-changeable compressor air inlet pressure force value that controller collects according to systematic parameter acquisition module and/or exhaust pressure value and off-premises station environment temperature carry out internal arithmetic process to generate control signal, VFC is carried out to frequency-changeable compressor, and external blower fan, outer expansion valve, outer cross valve carries out corresponding control.

In the air conditioner system control method of the embodiment of the present invention, the controller of off-premises station carries out VFC independent of indoor set to frequency-changeable compressor according to the operational factor of frequency-changeable compressor, specific communication is carried out to transmit corresponding controling parameters without the need to indoor set and off-premises station, decrease controling parameters transmitting procedure, reduce the complexity of air-conditioning system, improve air-conditioning system operational reliability.

Further, as shown in Figure 6, air conditioner system control method comprises the following steps according to an embodiment of the invention:

S801, obtains the mode of operation of air-conditioning system, and starts the frequency-changeable compressor of the off-premises station of air-conditioning system according to mode of operation.

Wherein, switching on and shutting down instruction and the mode selection command of remote controller, line control machine or indoor set transmission is received by the communicator of off-premises station, to obtain the mode of operation of air-conditioning system.

S802, obtains target refrigerant saturation temperature.

Wherein, according to one embodiment of present invention, if when off-premises station starts for the first time within the default work period, then detect the current environmental temperature of off-premises station, according to the current environmental temperature determination target refrigerant saturation temperature of off-premises station.It should be noted that, the default work period should make broad understanding, can be several years, also can be some months.Such as, when off-premises station is after closing summer, until just open again winter, at this moment if when the winter after some months, first time started, controller is according to the current environmental temperature determination target refrigerant saturation temperature of off-premises station, instead of the target refrigerant saturation temperature after the adjustment of recording during last shutdown (summer a few months ago).

S803, carries out VFC according to target refrigerant saturation temperature to frequency-changeable compressor.

S804, in the VFC process of frequency-changeable compressor, obtains the running time of frequency-changeable compressor and the running frequency of frequency-changeable compressor or running current.

S805, adjusts target refrigerant saturation temperature according to the running time of frequency-changeable compressor and the running frequency of frequency-changeable compressor or running current.

Specifically, in step S805, according to the running time of frequency-changeable compressor and the running frequency of frequency-changeable compressor or running current target refrigerant saturation temperature adjusted and comprise further: judge whether the running time of frequency-changeable compressor is more than or equal to the 4th time threshold; If judge to be more than or equal to the 4th time threshold the running time of frequency-changeable compressor, then obtain the current operation frequency of frequency-changeable compressor or current running current; Judge whether the current operation frequency of frequency-changeable compressor is more than or equal to predeterminated frequency threshold value, or whether the current running current of frequency-changeable compressor is more than or equal to predetermined current threshold; If the current operation frequency of frequency-changeable compressor is more than or equal to predeterminated frequency threshold value, or the current running current of frequency-changeable compressor is more than or equal to predetermined current threshold, then according to default step-length adjustment aim refrigerant saturation temperature.

Wherein, when mode of operation is heating mode, increases target refrigerant saturation temperature according to default step-length, and the running time of described frequency-changeable compressor is returned 0; When mode of operation is refrigeration mode, reduces target refrigerant saturation temperature according to default step-length, and the running time of described frequency-changeable compressor is returned 0.

The embodiment 2 of embodiment 1 in a chiller mode and heating mode describes the air conditioner system control method of the embodiment of the present invention in detail respectively below.

[embodiment 1]

After frequency-changeable compressor runs E minute, and the current operation frequency that the current operation frequency of frequency-changeable compressor is more than or equal to F hertz or frequency-changeable compressor is more than or equal to predeterminated frequency threshold value, can judge that the indoor cooling load of air-conditioning system is larger, controller is according to default step-length adjustment aim refrigerant saturation temperature Tes, i.e. continuous downward revision target refrigerant saturation temperature Tes, such as adjust Tes=Tes-1, more fresh target refrigerant saturation temperature Tes, the running time of described frequency-changeable compressor is returned 0 simultaneously, restart timing, with the target refrigerant saturation temperature Tes upgraded, constantly PID adjustment is carried out to current refrigerant saturation temperature Te, make frequency-changeable compressor improve rotating speed and reduce suction pressure, indoor temperature is made to reach setting target.Meanwhile, record current goal refrigerant saturation temperature, can as the initial target refrigerant saturation temperature of starting shooting next time.

Therefore, the situation that the air conditioner system control method of the embodiment of the present invention can affect refrigeration system operational factor according to system chambers internal loading situation carries out identifying and judging, thus adjust the running frequency of frequency-changeable compressor intelligently, the ability of air-conditioning system is played in time, reaches design temperature requirement.

[embodiment 2]

Therefore, the situation that the air conditioner system control method of the embodiment of the present invention can affect heating operational factor according to system chambers internal loading situation carries out identifying and judging, thus adjust the running frequency of frequency-changeable compressor intelligently, the ability of air-conditioning system is played in time, reaches design temperature requirement.

In one embodiment of the invention, when mode of operation is refrigeration mode, obtain the first pressure detecting signal by the first pressure sensor being arranged on frequency-changeable compressor porch.

Wherein, when air-conditioning system is single cooler, the first pressure sensor only need be set at the muffler place of frequency-changeable compressor to detect frequency-changeable compressor return-air low-pressure lateral pressure when air-conditioning system is freezed.

In another embodiment of the present invention, when mode of operation is heating mode, obtain the second pressure detecting signal by the second pressure sensor being arranged on frequency-changeable compressor exit.That is, when air-conditioning system is air conditioner, the second pressure sensor also need be set at the blast pipe place of frequency-changeable compressor to detect frequency-changeable compressor exhaust high side pressure when air-conditioning system heats.Certainly, also can assemble a pressure sensor after cross valve, be low-pressure lateral pressure during refrigeration, basic suitable with back pressure.High side pressure when heating, basic suitable with pressure at expulsion.

In step S803, according to target refrigerant saturation temperature, VFC is carried out to frequency-changeable compressor, comprises further:

S11, selects one of the first pressure detecting signal and the second pressure detecting signal to generate current refrigerant saturation temperature according to mode of operation.

S12, carries out VFC according to current refrigerant saturation temperature and target refrigerant saturation temperature to frequency-changeable compressor.

Further, in one embodiment of the invention, above-mentioned air conditioner system control method also comprises: when shutting down, using the target refrigerant saturation temperature after adjustment as target refrigerant saturation temperature during off-premises station start next time.

According to one embodiment of present invention, controller, when receiving machine open/close signal, carries out time delay certain hour such as S and processes second, to prevent client from selecting to cause off-premises station to start running because of maloperation, avoids the controller of off-premises station to carry out false judgment.That is, after the switching on and shutting down instruction receiving off-premises station, control off-premises station delay Preset Time such as S and start shooting or shut down second.

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

Fig. 7 is the block diagram of the off-premises station of air-conditioning system according to the embodiment of the present invention.As shown in Figure 7, the off-premises station 2 of this air-conditioning system comprises frequency-changeable compressor Mc and controller 21.

Wherein, controller 21 is for controlling frequency-changeable compressor, and controller 21 comprises: start module 201, target refrigerant saturation temperature control module 202 and VFC module 203(compressor output frequency control module 211).

Start module 201 for obtaining the mode of operation of air-conditioning system, and start the frequency-changeable compressor Mc of the off-premises station of air-conditioning system according to the mode of operation of air-conditioning system.Target refrigerant saturation temperature control module 202 is for obtaining target refrigerant saturation temperature, and in the VFC process of frequency-changeable compressor Mc, operational factor according to frequency-changeable compressor Mc adjusts target refrigerant saturation temperature, further, to in the VFC process of frequency-changeable compressor, target refrigerant saturation temperature control module 202 obtains the running time of frequency-changeable compressor and the running frequency of frequency-changeable compressor or running current, and according to the running time of frequency-changeable compressor and the running frequency of frequency-changeable compressor or running current, target refrigerant saturation temperature is adjusted.VFC module 203(compressor output frequency control module 211) for carrying out VFC according to target refrigerant saturation temperature to frequency-changeable compressor Mc.

In one embodiment of the invention, target refrigerant saturation temperature when target refrigerant saturation temperature control module 202 is also for starting shooting the target refrigerant saturation temperature after adjustment as off-premises station 2 is next when shutting down.

As shown in Figure 1B, off-premises station 2 also comprises: the first pressure sensor 23, first pressure sensor 23 being arranged on frequency-changeable compressor porch generates the first pressure detecting signal when mode of operation is refrigeration mode.Wherein, when air-conditioning system is single cooler, the first pressure sensor 23 only need be set at the muffler place of frequency-changeable compressor Mc to detect frequency-changeable compressor Mc return-air low-pressure lateral pressure when air-conditioning system is freezed.

According to one embodiment of present invention, as shown in Figure 2, off-premises station 2 also comprises: the second pressure sensor 24, second pressure sensor 24 being arranged on frequency-changeable compressor exit generates the second pressure detecting signal when mode of operation is heating mode.That is, when air-conditioning system is air conditioner, the second pressure sensor 24 also need be set at the blast pipe place of frequency-changeable compressor Mc and be vented high side pressure to detect frequency-changeable compressor Mc when air-conditioning system heats.Certainly, also can assemble a pressure sensor after cross valve, be low-pressure lateral pressure during refrigeration, basic suitable with back pressure.High side pressure when heating, basic suitable with pressure at expulsion.

Wherein, target refrigerant saturation temperature control module 202 selects one of the first pressure detecting signal and the second pressure detecting signal to generate current refrigerant saturation temperature according to mode of operation, and obtaining target refrigerant saturation temperature, VFC module 203 carries out VFC according to current refrigerant saturation temperature, target refrigerant saturation temperature to frequency-changeable compressor Mc.

As shown in Figure 1B or Fig. 2, off-premises station 2 also comprises: temperature sensor 25, temperature sensor 25 detects the current environmental temperature of environment residing for off-premises station 2, wherein, if when off-premises station 2 starts for the first time within the default work period, target refrigerant saturation temperature control module 202 is according to the current environmental temperature determination target refrigerant saturation temperature of off-premises station 2.It should be noted that, the default work period should make broad understanding, can be several years, also can be some months.Such as, when off-premises station 2 is after closing summer, until just open again winter, at this moment if when the winter after some months, first time started, target refrigerant saturation temperature control module 202 is according to the current environmental temperature determination target refrigerant saturation temperature of off-premises station 2, instead of the target refrigerant saturation temperature after the adjustment of recording during last shutdown (summer a few months ago).

In one embodiment of the invention, when being more than or equal to the 4th time threshold the running time of frequency-changeable compressor, and the current running current that the current operation frequency of frequency-changeable compressor is more than or equal to predeterminated frequency threshold value or frequency-changeable compressor is when being more than or equal to predetermined current threshold, target refrigerant saturation temperature control module 202 is according to default step-length adjustment aim refrigerant saturation temperature.

Wherein, when described mode of operation is heating mode, target refrigerant saturation temperature control module 202 increases target refrigerant saturation temperature according to default step-length, and the running time of frequency-changeable compressor is returned 0; When mode of operation is refrigeration mode, target refrigerant saturation temperature control module 202 reduces target refrigerant saturation temperature according to default step-length, and the running time of frequency-changeable compressor is returned 0.

Specifically, as shown in Figure 4, in a heating mode, off-premises station 2 is configured with the second pressure sensor 24 refrigerant high side pressure value being detected, starts module 201 and control frequency-changeable compressor heating operation according to the mode selection command control signal received and switching on and shutting down command control signal.

And, if indoor set is first time startup in the default work period, target refrigerant saturation temperature control module 202 is according to the current environmental temperature determination target refrigerant saturation temperature Tcs of off-premises station, such as, outdoor environment temperature is between 7-10 DEG C, and the initial target refrigerant saturation temperature determined is 46 DEG C.If indoor set is not first time startup in the default work period, the initial target refrigerant saturation temperature when target refrigerant saturation temperature of record is started shooting as this when target refrigerant saturation temperature control module 202 was shut down according to the last time.

Then the second pressure detecting signal that target refrigerant saturation temperature control module 202 generates according to the second pressure sensor 24 generates current refrigerant saturation temperature Tc, and then VFC module 203 constantly carries out PID adjustment according to target refrigerant saturation temperature Tcs to current refrigerant saturation temperature Tc.

In the present embodiment, after being more than or equal to the 4th time threshold such as certain hour E minute (30 minutes) running time of frequency-changeable compressor, the current operation frequency of target refrigerant saturation temperature control module 202 pairs of frequency-changeable compressors and predeterminated frequency threshold value such as F hertz compare to judge whether to need to revise target refrigerant saturation temperature Tcs, or the current running current of target refrigerant saturation temperature control module 202 pairs of frequency-changeable compressors and predetermined current threshold compare to judge whether to need to revise target refrigerant saturation temperature Tcs.

After frequency-changeable compressor runs E minute, and the current flow that the current operation frequency of frequency-changeable compressor is more than or equal to F hertz or frequency-changeable compressor is more than or equal to predetermined current threshold, can judge that the indoor heating load of air-conditioning system is larger, target refrigerant saturation temperature control module 202 is according to default step-length adjustment aim refrigerant saturation temperature Tcs, i.e. continuous upwards revise goal refrigerant saturation temperature Tcs, such as adjust Tcs=Tcs+1, more fresh target refrigerant saturation temperature Tcs, the running time of described frequency-changeable compressor is returned 0 simultaneously, restart timing, with the target refrigerant saturation temperature Tcs upgraded, constantly PID adjustment is carried out to current refrigerant saturation temperature Tc, VFC module 203 makes frequency-changeable compressor improve rotating speed, improve high pressure discharge pressure as early as possible, indoor temperature is made to reach setting target.Meanwhile, target refrigerant saturation temperature control module 202 records current goal refrigerant saturation temperature, can as the initial target refrigerant saturation temperature of starting shooting next time.

Therefore, the situation that the off-premises station of the air-conditioning system of the embodiment of the present invention can affect heating operational factor according to system chambers internal loading situation carries out identifying and judging, thus adjust the running frequency of frequency-changeable compressor intelligently, the ability of air-conditioning system is played in time, reaches design temperature requirement.

In embodiment 1, as shown in Figure 3, in cooling mode, similar to the adjustment process of target refrigerant saturation temperature in a heating mode in the adjustment process of target refrigerant saturation temperature control module 202 pairs of target refrigerant saturation temperatures and embodiment 2, just repeat no longer one by one here.

In addition, embodiments of the invention also proposed a kind of air-conditioning system, and it comprises the off-premises station of the air-conditioning system that the above embodiment of the present invention describes.

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

1. an air conditioner system control method, is characterized in that, comprises the following steps:

Obtain the mode of operation of air-conditioning system, and start the frequency-changeable compressor of the off-premises station of described air-conditioning system according to described mode of operation;

Obtain target refrigerant saturation temperature;

According to described target refrigerant saturation temperature, VFC is carried out to described frequency-changeable compressor;

To in the VFC process of described frequency-changeable compressor, obtain the running time of described frequency-changeable compressor and the running frequency of described frequency-changeable compressor or running current; And

According to the running time of described frequency-changeable compressor and the running frequency of described frequency-changeable compressor or running current, described target refrigerant saturation temperature is adjusted.

2. air conditioner system control method as claimed in claim 1, is characterized in that, is received switching on and shutting down instruction and the mode selection command of the transmission of remote controller, line control machine or indoor set, to obtain the mode of operation of described air-conditioning system by the communicator of described off-premises station.

3. air conditioner system control method as claimed in claim 1, is characterized in that, also comprise:

When shutting down, using the described target refrigerant saturation temperature after adjustment as target refrigerant saturation temperature during described off-premises station start next time.

4. air conditioner system control method as claimed in claim 1, it is characterized in that, the running frequency of the described running time according to described frequency-changeable compressor and described frequency-changeable compressor or running current adjust described target refrigerant saturation temperature and comprise further:

Judge whether the running time of described frequency-changeable compressor is more than or equal to the 4th time threshold;

If judge to be more than or equal to described 4th time threshold the running time of described frequency-changeable compressor, then obtain the current operation frequency of described frequency-changeable compressor or current running current;

Judge whether the current operation frequency of described frequency-changeable compressor is more than or equal to predeterminated frequency threshold value, or whether the current running current of described frequency-changeable compressor is more than or equal to predetermined current threshold;

If the current operation frequency of described frequency-changeable compressor is more than or equal to described predeterminated frequency threshold value, or the current running current of described frequency-changeable compressor is more than or equal to described predetermined current threshold, then adjust described target refrigerant saturation temperature according to default step-length.

5. air conditioner system control method as claimed in claim 4, is characterized in that, wherein,

When described mode of operation is heating mode, increases described target refrigerant saturation temperature according to described default step-length, and the running time of described frequency-changeable compressor is returned 0;

When described mode of operation is refrigeration mode, reduces described target refrigerant saturation temperature according to described default step-length, and the running time of described frequency-changeable compressor is returned 0.

6. air conditioner system control method as claimed in claim 1, it is characterized in that, described acquisition target refrigerant saturation temperature comprises further:

If when described off-premises station starts for the first time within the default work period, then detect the current environmental temperature of described off-premises station; And

Described target refrigerant saturation temperature is determined according to the current environmental temperature of described off-premises station.

7. air conditioner system control method as claimed in claim 1, is characterized in that, when described mode of operation is refrigeration mode, obtain the first pressure detecting signal by the first pressure sensor being arranged on described frequency-changeable compressor porch.

8. air conditioner system control method as claimed in claim 7, is characterized in that, when described mode of operation is heating mode, obtain the second pressure detecting signal by the second pressure sensor being arranged on described frequency-changeable compressor exit.

9. air conditioner system control method as claimed in claim 8, is characterized in that, carry out VFC, comprise further according to described target refrigerant saturation temperature to described frequency-changeable compressor:

One of described first pressure detecting signal and the second pressure detecting signal is selected to generate current refrigerant saturation temperature according to described mode of operation; And

According to described current refrigerant saturation temperature and described target refrigerant saturation temperature, VFC is carried out to described frequency-changeable compressor.

10. air conditioner system control method as claimed in claim 1, is characterized in that, also comprise:

After the switching on and shutting down instruction receiving described off-premises station, control described off-premises station and postpone Preset Time start or shutdown.

The off-premises station of 11. 1 kinds of air-conditioning systems, is characterized in that, comprising:

Frequency-changeable compressor;

Controller, described controller is used for controlling described frequency-changeable compressor, and described controller comprises:

Starting module, for obtaining the mode of operation of air-conditioning system, and starting the frequency-changeable compressor of the off-premises station of described air-conditioning system according to the mode of operation of described air-conditioning system;

Target refrigerant saturation temperature control module, for obtaining target refrigerant saturation temperature, and in the VFC process of described frequency-changeable compressor, obtain the running time of described frequency-changeable compressor and the running frequency of described frequency-changeable compressor or running current, and according to the running time of described frequency-changeable compressor and the running frequency of described frequency-changeable compressor or running current, described target refrigerant saturation temperature is adjusted;

VFC module, for carrying out VFC according to described target refrigerant saturation temperature to described frequency-changeable compressor.

The off-premises station of 12. air-conditioning systems as claimed in claim 11; it is characterized in that; described target refrigerant saturation temperature control module, target refrigerant saturation temperature time also for the described target refrigerant saturation temperature after adjustment being started shooting as described off-premises station is next when shutting down.

The off-premises station of 13. air-conditioning systems as claimed in claim 11, it is characterized in that, when being more than or equal to the 4th time threshold the running time of described frequency-changeable compressor, and the current running current that the current operation frequency of described frequency-changeable compressor is more than or equal to predeterminated frequency threshold value or described frequency-changeable compressor is when being more than or equal to predetermined current threshold, described target refrigerant saturation temperature control module adjusts described target refrigerant saturation temperature according to default step-length.

The off-premises station of 14. air-conditioning systems as claimed in claim 13, is characterized in that, wherein,

When described mode of operation is heating mode, described target refrigerant saturation temperature control module increases described target refrigerant saturation temperature according to described default step-length, and the running time of described frequency-changeable compressor is returned 0;

When described mode of operation is refrigeration mode, described target refrigerant saturation temperature control module reduces described target refrigerant saturation temperature according to described default step-length, and the running time of described frequency-changeable compressor is returned 0.

The off-premises station of 15. air-conditioning systems as claimed in claim 11, is characterized in that, also comprise:

Temperature sensor, described temperature sensor detects the current environmental temperature of environment residing for described off-premises station, wherein, if when described off-premises station starts for the first time within the default work period, described target refrigerant saturation temperature control module determines described target refrigerant saturation temperature according to the current environmental temperature of described off-premises station.

The off-premises station of 16. air-conditioning systems as claimed in claim 11, is characterized in that, also comprise:

Be arranged on the first pressure sensor of described frequency-changeable compressor porch, described first pressure sensor generates the first pressure detecting signal when described mode of operation is refrigeration mode.

The off-premises station of 17. air-conditioning systems as claimed in claim 16, is characterized in that, also comprise:

Be arranged on second pressure sensor in described frequency-changeable compressor exit, described second pressure sensor generates the second pressure detecting signal when described mode of operation is heating mode.

The off-premises station of 18. air-conditioning systems as claimed in claim 17, it is characterized in that, described target refrigerant saturation temperature control module selects one of described first pressure detecting signal and the second pressure detecting signal to generate current refrigerant saturation temperature according to described mode of operation, and obtaining target refrigerant saturation temperature, described VFC module carries out VFC according to described current refrigerant saturation temperature, described target refrigerant saturation temperature to described frequency-changeable compressor.

19. 1 kinds of air-conditioning systems, is characterized in that, comprise the off-premises station of the air-conditioning system as described in any one of claim 11-18.