CN108548294A - A kind of control method and device of air-conditioning system - Google Patents

A kind of control method and device of air-conditioning system Download PDF

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Publication number
CN108548294A
CN108548294A CN201810293852.2A CN201810293852A CN108548294A CN 108548294 A CN108548294 A CN 108548294A CN 201810293852 A CN201810293852 A CN 201810293852A CN 108548294 A CN108548294 A CN 108548294A
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CN
China
Prior art keywords
temperature
air
conditioning system
outdoor environment
temperature difference
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Granted
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CN201810293852.2A
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Chinese (zh)
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CN108548294B (en
Inventor
崔俊
徐丽丽
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
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Priority to CN201810293852.2A priority Critical patent/CN108548294B/en
Publication of CN108548294A publication Critical patent/CN108548294A/en
Application granted granted Critical
Publication of CN108548294B publication Critical patent/CN108548294B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air

Abstract

The invention discloses a kind of control method and device of air-conditioning system, belong to air-conditioning technical field.Control method includes：Obtain outdoor environment temperature Tao and heatsink temperature Tx；If the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is not less than preset temperature difference threshold, then control to adjust the aperture of throttling set, until when compressor is run with target exhaust temperature, the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold.The temperature protection that the control method of air-conditioning system provided by the invention can meet electrical control member at the same time requires and air-conditioning system is for the performance requirement of compressor exhaust temperature, the effective guarantee safe and effective operation of air-conditioning system entirety.

Description

A kind of control method and device of air-conditioning system
Technical field
The present invention relates to air-conditioning system technical fields, more particularly to a kind of control method and device of air-conditioning system.
Background technology
Currently on the market determine frequency or frequency-conversion air-conditioning system product, air-conditioning system in the process of running, computer board, monolithic The electrical control members such as machine itself work will produce a large amount of heat, cause the temperature of electrical control member also to increase, in electrical control member temperature mistake Gao Shi can trigger the high temperature protection mechanism of air-conditioning system shutdown.In order to solve the problems, such as that electrical control member temperature is excessively high, existing part Cooling circuit can be added in air-conditioning system, and radiating and cooling is carried out to electrical control member using the refrigerant of air-conditioning system.
A kind of structure type of cooling circuit in the prior art is the interior of one section of connection air-conditioning system of cooling circuit On refrigerant pipe section between heat exchanger and outdoor heat exchanger, the other end is then connected on the gas returning port of compressor；Cooling circuit When work, the part refrigerant flowed through in the refrigerant pipe section of its connection can be shunted, to be carried out to electrical control member by low temperature refrigerant Cooling, the refrigerant after absorbing heat then are back to compressor.There are certain drawbacks for this structure type, flow through the portion of refrigerant pipeline Due to absorbing heat, its own temperature is often different from flowing back to the refrigerant of compressor along normal medium circulation pipeline for point refrigerant Temperature, therefore, the temperature for the whole refrigerant that compressor is returned in the refrigerant meeting convection current that compressor is flowed into from cooling line are constituted centainly It influences, this temperature that will further result in the refrigerant that the compressor run with rated frequency is discharged can also become therewith Change.Therefore, it is certain influence to be constituted to the heat exchange property of air-conditioning system when cooling line enables so that the reality of air-conditioning system Border operating parameter and the parameter of setting are not inconsistent, and such as cause the actual exhaust air temperature of compressor excessively high or excessively low, this is increased by The unstability of air-conditioning system operation.
Invention content
The present invention provides a kind of control method and device of air-conditioning system, it is intended to solve air-conditioning system and be carried out to electrical control member The problem of causing influence of fluctuations to self-operating parameter when cooling.In order to the embodiment to disclosure some aspects there are one base This understanding, is shown below simple summary.The summarized section is not extensive overview, nor to determine key/critical group At element or describe the protection domains of these embodiments.Its sole purpose is that some concepts are presented with simple form, is made with this For the preamble of following detailed description.
According to the first aspect of the invention, a kind of control method of air-conditioning system, air-conditioning system air-conditioning system are provided Including refrigerant circulation circuit and cooling branch, refrigerant circulation circuit include the indoor heat exchanger connected by refrigerant pipe, heat exchanger, The first end of four-way valve, liquid storage device and compressor, cooling branch is connected to the refrigerant between indoor heat exchanger and outdoor heat exchanger On the flash evaporation of pipeline section, second end is connected to the input end of liquid storage device, and cooling line is provided with radiator；Air-conditioning system is also wrapped Electrical control member is included, electrical control member, radiator and liquid storage device are neighbouring to be arranged, and heat exchange can be carried out between three；Air-conditioning further includes section Flow device, throttling set include be set to the first refrigerant between flash evaporation and outdoor heat exchanger be in charge of section first throttling device, The second refrigerant between flash evaporation and indoor heat exchanger is in charge of the second throttling device of section, is set to the third section of cooling branch Flow device；Control method includes：
Obtain outdoor environment temperature Tao and heatsink temperature Tx；
If the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is not less than preset temperature difference threshold, The aperture of throttling set is controlled to adjust, until when compressor is run with target exhaust temperature, outdoor environment temperature Tao and cooling fin Temperature difference between temperature Tx is less than preset temperature difference threshold.
In a kind of optional embodiment, control method further includes：If outdoor environment temperature Tao and heatsink temperature Temperature difference between Tx is less than preset temperature difference threshold, then controls the aperture of the throttling set for the inflow side for reducing flash evaporation, directly To the target exhaust temperature for reaching compressor.
In a kind of optional embodiment, the aperture of throttling set is controlled to adjust, including：Control to adjust cooling branch The aperture of third throttling set.
In a kind of optional embodiment, the aperture of the third throttling set of cooling branch is controlled to adjust, including：Control Third throttling set is opened with the pulse rate set.
In a kind of optional embodiment, control method further includes：According to outdoor environment temperature Tao and preset rule Then, target exhaust temperature is determined, default rule is used to characterize outdoor environment temperature Tao and the association of target exhaust temperature is closed System.
According to the second aspect of the invention, a kind of control device of air-conditioning system, air-conditioning system air-conditioning system are additionally provided System includes refrigerant circulation circuit and cooling branch, and refrigerant circulation circuit includes the indoor heat exchanger connected by refrigerant pipe, exchanges heat Device, four-way valve, liquid storage device and compressor, the first end of cooling branch are connected to cold between indoor heat exchanger and outdoor heat exchanger On the flash evaporation of matchmaker's pipeline section, second end is connected to the input end of liquid storage device, and cooling line is provided with radiator；Air-conditioning system is also Including electrical control member, electrical control member, radiator and liquid storage device are neighbouring to be arranged, and heat exchange can be carried out between three；Air-conditioning further includes Throttling set, throttling set include the first throttle dress that the first refrigerant being set between flash evaporation and outdoor heat exchanger is in charge of section Set, the second refrigerant between flash evaporation and indoor heat exchanger is in charge of the second throttling device of section, be set to the of cooling branch Three throttling sets；Control device includes：
Acquiring unit, for obtaining outdoor environment temperature Tao and heatsink temperature Tx；
First control unit, if the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is not less than Preset temperature difference threshold then controls to adjust the aperture of throttling set, until when compressor is run with target exhaust temperature, outdoor ring Temperature difference between border temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold.
In a kind of optional embodiment, control device further includes the second control unit, is used for：If outdoor environment temperature The temperature difference spent between Tao and heatsink temperature Tx is less than preset temperature difference threshold, then controls the inflow side for reducing flash evaporation The aperture of throttling set, until reaching the target exhaust temperature of compressor.
In a kind of optional embodiment, the first control unit is specifically used for：Control to adjust the third section of cooling branch Flow the aperture of device.
In a kind of optional embodiment, the first control unit is specifically used for：Third throttling set is controlled to set Pulse rate is opened.
In a kind of optional embodiment, control device further includes determination unit, is used for：According to outdoor environment temperature Tao and default rule determine target exhaust temperature, and default rule is for characterizing outdoor environment temperature Tao and target exhaust The incidence relation of temperature.
The present invention is using advantageous effect possessed by above-mentioned technical proposal：
The control method of air-conditioning system provided by the invention can be between outdoor environment temperature Tao and heatsink temperature Tx Temperature difference be susceptible to damage not less than preset temperature difference threshold this electrical control member, trigger the temperature conditions of high temperature protection under, By way of adjusting the aperture of throttling set, changes the current operating conditions of air-conditioning system, make compressor with target exhaust temperature When degree operation, the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold, so as to The temperature protection for meeting electrical control member simultaneously requires and air-conditioning system is for the performance requirement of compressor exhaust temperature, effective guarantee The safe and effective operation of air-conditioning system entirety.
It should be understood that above general description and following detailed description is only exemplary and explanatory, not It can the limitation present invention.
Description of the drawings
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the present invention Example, and be used to explain the principle of the present invention together with specification.
Fig. 1 is the structural schematic diagram of the air-conditioning system of the present invention shown by an exemplary embodiment；
Fig. 2 is the flow diagram one of the control method of the air-conditioning system of the present invention shown by embodiment (one)；
Fig. 3 is the flow diagram two of the control method of the air-conditioning system of the present invention shown by embodiment (one)；
Fig. 4 is the flow diagram one of the control method of the air-conditioning system of the present invention shown by embodiment (two)；
Fig. 5 is the flow diagram two of the control method of the air-conditioning system of the present invention shown by embodiment (two)；
Fig. 6 is the flow diagram one of the control method of the air-conditioning system of the present invention shown by embodiment (three)；
Fig. 7 is the flow diagram two of the control method of the air-conditioning system of the present invention shown by embodiment (three)；
Fig. 8 is the flow diagram one of the control method of the air-conditioning system of the present invention shown by embodiment (four)；
Fig. 9 is the flow diagram two of the control method of the air-conditioning system of the present invention shown by embodiment (four)；
Figure 10 is the flow diagram one of the control method of the air-conditioning system of the present invention shown by embodiment (five)；
Figure 11 is the flow diagram two of the control method of the air-conditioning system of the present invention shown by embodiment (five)；
Figure 12 is the flow diagram of the control method of the air-conditioning system of the present invention shown by embodiment (six)；
Figure 13 is the structure diagram of the control device of the air-conditioning system of the present invention shown by embodiment (one)；
Figure 14 is the structure diagram of the control device of the air-conditioning system of the present invention shown by embodiment (two)；
Figure 15 is the structure diagram of the control device of the air-conditioning system of the present invention shown by embodiment (three)；
Figure 16 is the structure diagram of the control device of the air-conditioning system of the present invention shown by embodiment (four)；
Figure 17 is the structure diagram of the control device of the air-conditioning system of the present invention shown by embodiment (five)；
Figure 18 is the structure diagram of the control device of the air-conditioning system of the present invention shown by embodiment (six).
Wherein, 11, First Heat Exchanger；12, the second heat exchanger；
2, compressor；3, four-way valve；4, liquid storage device；
51, flash evaporation；52, cooling branch；53, radiator；
61, the first pipeline；62, the second pipeline；
71, the first refrigerant is in charge of section；72, the second refrigerant is in charge of section；
81, first throttling device；82, second throttling device；83, third throttling set.
Specific implementation mode
The following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to Put into practice them.Other embodiments may include structure, logic, it is electrical, process and other change.Embodiment Only represent possible variation.Unless explicitly requested, otherwise individual components and functionality is optional, and the sequence operated can be with Variation.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.This hair The range of bright embodiment includes equivalent obtained by the entire scope of claims and all of claims Object.Herein, each embodiment individually or can be indicated generally with term " invention ", and it is convenient that this is used for the purpose of, And if in fact disclosing the invention more than one, it is not meant to automatically limit ranging from any single invention of the application Or inventive concept.Herein, relational terms such as first and second and the like be used only for by an entity or operation with Another entity or operation distinguish, and without requiring or implying, there are any actual relationships between these entities or operation Or sequence.Moreover, the terms "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, to So that the process, method or equipment that include a series of elements include not only those elements, but also include being not explicitly listed Other element, or further include for this process, method or the intrinsic element of equipment.In the feelings not limited more Under condition, the element that is limited by sentence "including a ...", it is not excluded that in process, method or equipment including the element In there is also other identical elements.Each embodiment herein is described by the way of progressive, and each embodiment stresses Be all difference from other examples, just to refer each other for identical similar portion between each embodiment.For implementing For method, product etc. disclosed in example, since it is corresponding with method part disclosed in embodiment, so the comparison of description is simple Single, reference may be made to the description of the method.
Fig. 1 is the structural schematic diagram of the air-conditioning system of the present invention shown by an exemplary embodiment.
Fig. 1 shows a kind of structure of the air-conditioning system of optional application control method of the present invention, specifically, the air-conditioning system System includes indoor unit and outdoor unit, wherein indoor unit includes the First Heat Exchanger 11 to exchange heat with indoor environment, outdoor unit packet Include the second heat exchanger 12 to exchange heat with outdoor environment, the compressor 2 for providing circulation power for refrigerant, for passing through valve The four-way valve 3 of refrigerant flow direction switching is realized in switching, and the refrigerant that compressor 2 is returned in convection current such as is filtered, detaches, storing at the storages of operations Liquid device 4；The electrical control members such as computer board, microcontroller are set in outdoor unit.
First Heat Exchanger 11, the second heat exchanger 12, four-way valve 3, liquid storage device 4 and compressor 2 pass through the first pipeline 61 and Two pipelines 62 are connected, and for constituting conventional refrigerant circulation circuit, in embodiment, air-conditioning system is in summer operation refrigeration mode When, refrigerant outflow out of second heat exchanger 12 after exchanging heat with outdoor environment flows into First Heat Exchanger via the first pipeline 61 11, meanwhile, the refrigerant after exchanging heat with indoor environment is flowed out from First Heat Exchanger 11, and the second heat exchange is flowed into via the second pipeline 62 Device 12, by the refrigerant circulation process, it can be achieved that air-conditioning system is to the refrigeration cool-down function of indoor environment.
Similarly, when running heating mode in winter, refrigerant edge and system between First Heat Exchanger 11 and the second heat exchanger 12 The opposite direction flowing of chill formula is, it can be achieved that air-conditioning system heats up function to the heating of indoor environment.
In implementing, electrical control member is arranged adjacent to liquid storage device 4.In general, be back to the temperature of the refrigerant of liquid storage device 4 compared with It is low, and run heating less than electrical control member mostly or influenced the own temperature of caused Wen Sheng by outdoor temperature, in this way, by electric Control adjacent to liquid storage device 4 be arranged, can utilize liquid storage device 4 in low temperature refrigerant absorb electrical control member heat, electrical control member with storage After the refrigerant of liquid device 4 carries out heat exchange, own temperature reduces, so as to avoid the burning caused by electrical control member temperature is excessively high It ruins, trigger the problems such as stoppage protection.
Here, the shell of liquid storage device 4 is preferably made of transcalent material, such as metal material, in this way, can improve cold Heat conduction efficiency between matchmaker and electrical control member accelerates the rate of temperature fall of electrical control member.
In actual application, the outer surface for liquid storage device 4 that electrical control member directly can recline is arranged, alternatively, interval is certain Distance setting.
In addition to above-mentioned conventional refrigerant circulation circuit, air-conditioning system of the invention further includes cooling tube group, for solving electricity Temperature excessively high problem when control works.
Specifically, cooling tube group includes mainly 52 two parts of cooling component and cooling branch, wherein cooling component is mainly wrapped It includes：
Flash evaporation 51, flash evaporation 51 are connected on the first pipeline 61, can be cold by the operative liquid for flowing through the first pipeline 61 Matchmaker is evaporated to gaseous coolant, and gaseous coolant is delivered in cooling branch 52, to using gaseous coolant as cooling branch Heat transferring medium in 52 follow-up cooling procedures；
Radiator 53, radiator 53 is connected on cooling branch 52 and neighbouring electrical control member is arranged, since electrical control member is big It is be arranged in the semienclosed containers such as electric-controlled box more, therefore radiator 53 can also be used as gaseous coolant and electrical control member surrounding air Heat-exchange carrier, cooled down by the surrounding air to electrical control member, so can by the temperature of electrical control member itself control pacify Below full operating temperature.
The first end of cooling branch 52 is connected to the flash evaporation of the refrigerant pipeline section between indoor heat exchanger and outdoor heat exchanger On 51, second end is connected to the input end of liquid storage device 4.
The concrete structure and type of radiator 53 can be according to the structure determinations of outdoor unit, cooling branch 52 in embodiment 53 type of radiator of upper setting is parallel-flow heat exchanger, and it is excellent that parallel-flow heat exchanger has that heat transfer rate is high, space hold is small etc. Point is suitable for compact-sized outdoor unit of air-conditioning system structure.
Optionally, it is shown in Fig. 1 go out radiator 53 structure in, parallel-flow heat exchanger offers one or more U-tube slot, multiple U-tube slots are connected successively, can be used for laying portions of the cooling branch 52 in parallel-flow heat exchanger. U-tube slot can make the portions of the cooling branch 52 in parallel-flow heat exchanger in approximation S types or it is snakelike in a manner of arrange Cloth is improved and is dissipated so as to increase the thermal conductivity points quantity and heat-conducting area of cooling branch 52 and the cooling fin of parallel-flow heat exchanger The heat conduction efficiency of hot device.
The air-conditioning system of the present invention further includes throttling set, throttling set include be set to flash evaporation 51 and outdoor heat exchanger it Between the first refrigerant be in charge of the first throttling device 81 of section 71, the second refrigerant between flash evaporation 51 and indoor heat exchanger point The second throttling device 82 of pipeline section 72 is set to the third throttling set 83 of cooling branch 52.Here, the first refrigerant is in charge of 71 He of section Second refrigerant is in charge of the pipeline section component part that section 72 is the first pipeline 61 above-mentioned.
First throttling device 81 can change the flow for flowing through its refrigerant and throttling ginseng by adjusting the valve opening of its own Number (such as refrigerant temperature, refrigerant pressure), is in charge of section so as to adjust the first refrigerant flowed through between flash evaporation 51 and outdoor heat exchanger The flow and Restriction Parameters of 71 refrigerant.
Second throttling device 82 can change the flow for flowing through its refrigerant and throttling ginseng by adjusting the valve opening of its own Number (such as refrigerant temperature, refrigerant pressure), is in charge of section so as to adjust the second refrigerant flowed through between flash evaporation 51 and indoor heat exchanger The flow and Restriction Parameters of 72 refrigerant.
Third throttling set 83 can change the flow for flowing through its refrigerant and throttling ginseng by adjusting the valve opening of its own Number (such as refrigerant temperature, refrigerant pressure), so as to adjust flowing through in the flow and Restriction Parameters of the refrigerant of cooling branch 52.In Fig. 1 In shown structure, third throttling set 83 is set to the cooling branch between the second end and parallel-flow heat exchanger of cooling branch 52 On the pipeline section on road 52.
In the following, in conjunction with above-mentioned this kind optionally using the air-conditioning system of control method of the present invention, to the controlling party of the present invention The detailed process of multiple embodiments of method is described in detail.
Embodiment (one)
Fig. 2 is the flow diagram one of the control method of the air-conditioning system of the present invention shown by embodiment (one).
As shown in Fig. 2, the present invention provides a kind of control method of air-conditioning system, the main control flow of the control method It may include：
S201, outdoor environment temperature Tao is obtained；
In this embodiment, in the present embodiment, the outdoor unit of air-conditioning system is configured with another temperature sensor, the temperature sensing Device can be used for detecting the Current Temperatures parameter of outdoor environment, and the temperature sensing for being set to outdoor unit can be obtained in step S201 Current Temperatures parameter detected by device, and as outdoor environment temperature Tao.
Alternatively, air-conditioning system of the present invention accesses external network by home LAN, and can be from air-conditioning products service The server of quotient, or the network platform of weather data information is provided, search the outdoor environment corresponding to the coordinate position of the air-conditioning Data, outdoor environment data include the Current Temperatures parameter of outdoor environment, in this way, step S201 can be through searching obtained outdoor The Current Temperatures parameter of environment is as outdoor environment temperature Tao.
S202, heatsink temperature Tx is obtained；
In this embodiment, in the present embodiment, the outdoor unit of air-conditioning system is configured with another temperature sensor, the temperature sensing The induction end of device is set on the cooling fin of radiator, can be used for detecting the Current Temperatures parameter of the cooling fin of radiator, The Current Temperatures parameter detected by the temperature sensor can be obtained in step S202, and as heatsink temperature Tx.
In embodiment, since heatsink temperature Tx can carry out heat exchange with electrical control member, it is finally reached the temperature of the two Equal or close, therefore, heatsink temperature Tx can reflect the real time temperature of electrical control member to a certain extent, therefore, another In some embodiments, heatsink temperature Tx can also use the real time temperature data of the collected electrical control member of temperature sensor as generation It replaces.
If the temperature difference between S203, outdoor environment temperature Tao and heatsink temperature Tx is not less than preset temperature difference threshold Value, then correct the target exhaust temperature of compressor, and control to adjust the aperture of throttling set, until compressor is with revised row When temperature degree is run, the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold.
Here, air-conditioning preheater system has one or more temperature difference thresholds, and temperature difference threshold can be used for characterizing and can make at electrical control member In the temperature threshold value of safe work state or the temperature threshold value of triggerable air-conditioning high temperature stoppage protection.That is, in outdoor ring Temperature difference between border temperature Tao and heatsink temperature Tx is not less than under the temperature condition of preset temperature difference threshold, electrical control member meeting In it is easily damaged, burn the non-security working condition melted or air-conditioning system may be caused to trigger high temperature stoppage protection pattern, at this point, Air-conditioning system can constitute adverse effect generally in misoperation, to operation of air conditioner performance；And it in outdoor environment temperature Tao and dissipates Temperature difference between backing temperature Tx is less than under the temperature condition of preset temperature difference threshold, and electrical control member is then in safe work state Or air-conditioning system will not trigger high temperature stoppage protection pattern, at this point, air-conditioning system is generally in normal operation, outer temperature is to air-conditioning The influence of runnability is smaller.
In the present embodiment, for the ease of temperature difference compared with the numerical values recited of temperature difference threshold, temperature difference generally takes outdoor Environment temperature Tao and heatsink temperature Tx obtains the absolute value of difference.
In this way, the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is not less than preset temperature difference threshold This electrical control member be susceptible to damage, trigger high temperature protection temperature conditions under, pass through correct compressor target exhaust temperature And the mode of the aperture of throttling set is adjusted, change the current operating conditions of air-conditioning system, makes compressor with revised exhaust When temperature is run, the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold, so as to Temperature protection to meet electrical control member simultaneously requires and air-conditioning system is for the performance requirement of compressor exhaust temperature, effectively protects The safe and effective operation of air-conditioning system entirety is hindered.
Optionally, if the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold Value, at this point, air-conditioning is in normal operating condition, then can adjust the current exhaust gas temperature of compressor to target exhaust temperature, make It meets the temperature requirement of the refrigerant heat exchange of air-conditioning；Therefore, control method further includes：The aperture of throttling set is controlled to adjust, directly To the target exhaust temperature for reaching compressor.
Here, air-conditioning system is built-in with the programs such as the operation algorithm of target exhaust temperature, by obtaining set by user One or more parameter, the target exhaust temperature for the compressor for being applicable in current working can be calculated automatically from, for example, empty Adjusting system is equipped with a temperature map table, which can be used for characterizing the mapping of user's set temperature and the delivery temperature of compressor Setup parameter corresponding to relationship and each delivery temperature, for example, when user's set temperature is 23 DEG C, the compression of mapping The delivery temperature of machine is 70 DEG C；When user's set temperature is 26 DEG C, the delivery temperature of the compressor of mapping is 65 DEG C, etc.. After user's set temperature determines, you can the delivery temperature of compressor and its corresponding setup parameter are determined according to mapping table, The operation for adjusting the associated components of air-conditioning system, makes the actual exhaust air temperature of compressor reach the delivery temperature.Here, the exhaust Temperature is target exhaust temperature above-mentioned.
Here, user's set temperature is the preferred temperature that user is inputted by remote controler or control panel to air-conditioning system Parameter.
Alternatively, according to outdoor environment temperature Tao and default rule, determine that target exhaust temperature, default rule are used for Characterize the incidence relation of outdoor environment temperature Tao and target exhaust temperature.
It should be understood that the method for determination of above-mentioned target exhaust temperature is not limited to above-mentioned mapping table, can also pass through The mapping relations of other parameters or other algorithms, which calculate, determines target exhaust temperature, and the invention is not limited thereto.
It in the present embodiment, first can be according to above-mentioned setup parameter by the exhaust of compressor after air-conditioning booting operation Temperature is adjusted to target exhaust temperature, later, with the continuous service of air-conditioning and the lasting variation of outdoor temperature, the temperature of electrical control member Degree also changes therewith, and therefore, the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is also constantly changing, this is just So that the temperature for flowing back to the refrigerant of compressor is not unique constant yet, therefore, the compressor of air-conditioning system is in one section of operation After duration, although being still to be run with setup parameter, its actual delivery temperature is not often inconsistent with target exhaust temperature, and Readjust that the variable suffered by setup parameter is also more, process is complicated and most of air-conditioning systems do not set relevant secondary calculating Algorithm, therefore, the present invention is not under the premise of resetting the setup parameter of air-conditioning system, by adjusting throttling set wherein One or several apertures changes the refrigerant temperature for flowing back to compressor, so that the actual exhaust air temperature of the compressor after adjusting It can be consistent with target exhaust temperature, to meet the heat exchange demand of air-conditioning, be effectively simplified the Secondary Control stream to delivery temperature Journey.
Specifically, by way of the aperture of throttling set of the present invention controlling the inflow side for reducing flash evaporation, to reach Change the purpose of the target exhaust temperature of compressor.Here, when air-conditioning is with different run-modes, refrigerant is in the first pipeline Interior flow direction is also different, for example, in air-conditioning system structure shown in Fig. 1, when air-conditioning is run in a chiller mode, refrigerant is first Flow direction in pipeline is to flow from left to right, at this point, the side residing for first throttling device is the inflow side of flash evaporation, second saves Flow the outflow side that the side residing for device is flash evaporation；And when air-conditioning is run with heating mode, refrigerant is in the first pipeline Flow direction is that right-to-left flows, at this point, outflow side of the side residing for first throttling device for flash evaporation, second throttling device institute The side at place is the inflow side of flash evaporation.
Therefore, when air-conditioning is run in a chiller mode, when meeting working condition above-mentioned, then reduction first throttle is controlled The aperture of device；When air-conditioning is run with heating mode, then the aperture for lowering second throttling device is controlled.
Here, after flowing through throttling set, the temperature and pressure of itself declines refrigerant.Therefore, by reducing shwoot The aperture of the throttling set of the inflow side of side, can reduce the temperature and pressure for the refrigerant for flowing into flash evaporation, and can further drop The temperature and pressure of the low refrigerant for flowing back to compressor, in this way, by the above-mentioned means, can be by the actual exhaust air temperature tune of compressor It saves to target exhaust temperature.
Optionally, the aperture of the throttling set of the inflow side of flash evaporation can be gradually decrease to a certain open with the rate of setting Number of degrees value, alternatively, directly the aperture of the throttling set of inflow side is reduced in one or more aperture numerical value of setting, until The actual exhaust air temperature of compressor reaches target exhaust temperature.
Optionally, when the throttling set of the inflow side of flash evaporation is reduced with the rate that sets, which can be according to Preset rule is predefined, for example, rate is in certain preset ratio relationship with temperature difference, in this way, in the temperature difference After value determines, so that it may with the rate set according to the preset ratio relationship, and throttling set is reduced according to the rate Aperture, so that the delivery temperature of compressor reaches target exhaust temperature.
Optionally, the target exhaust temperature that compressor is corrected in step S203, specifically may include：By adjusting compressor Operating parameter, control reduce the target exhaust temperature of compressor to correction value, and correction value is revised delivery temperature.
Here, the operating parameter of compressor includes but not limited to：Operation power, working voltage or the operation electricity of compressor Stream.
In the present embodiment, air-conditioning system prestores multiple correction values, and multiple correction values are arranged in sequence, As from big to small.In this way, the target exhaust temperature of compressor can be successively reduced to above-mentioned each correction value, and pass through adjusting Throttling set judges after being modified operation and adjusting operation, if meet outdoor environment temperature Tao and heatsink temperature Temperature difference between Tx is less than this condition of preset temperature difference threshold, if it is satisfied, then being arranged using current correction value as target Temperature degree；If conditions are not met, then by delivery temperature from current correction value amendment to next correction value, and repeat above-mentioned throttling dress The adjusting operation set, until the temperature difference met between outdoor environment temperature Tao and heatsink temperature Tx is less than the preset temperature difference This condition of threshold value.
Preferably, the difference between multiple correction values of sequential tapers off rule, i.e., amendment width when correcting every time Degree is gradually reduced, this way it is possible to avoid the problem of needs caused by amendment excess are reversely corrected, reduces and correct operation Overall execution number.
Fig. 3 is the flow diagram two of the control method of the air-conditioning system of the present invention shown by embodiment (one).
As shown in figure 3, the main control flow of another control method provided by the invention may include：
S301, air-conditioning are run in a chiller mode；
S302, outdoor environment temperature Tao is obtained；
S303, heatsink temperature Tx is obtained；
S304, the temperature difference △ t for calculating outdoor environment temperature Tao and heatsink temperature Tx；
S305, judge whether temperature difference △ t are not less than temperature difference threshold △ T, if so, S306 is thened follow the steps, if not, Then follow the steps S309；
S306, by the delivery temperature amendment of compressor to correction value Tn；
Here, Tn includes the T of sequential1... ..., Tn；
S307, n=n+1；
S308, the aperture for reducing first throttling device return to step S302 to K1；
S309, the aperture k for reducing first throttling device；
S310, the current exhaust gas temperature for obtaining compressor；
S311, judge whether the current exhaust gas temperature of compressor reaches target exhaust temperature, if so, thening follow the steps S312, if not, thening follow the steps S309；
In the present embodiment, above mentioned steps S3 06 is based on initial target delivery temperature to first repair of delivery temperature, Then it is by new mesh in step S311 therefore and using correction value when meeting step S305 as new target exhaust temperature Mark delivery temperature is corrected again to initial target exhaust temperature, so that air-conditioning final delivery temperature meets the needs of of heat exchange；
Alternatively, above mentioned steps S3 06 is based on detected when this flow starts work as to first repair of delivery temperature Front exhaust temperature, and using correction value when meeting step S305 as new target exhaust temperature, therefore, in step S311, It is then to correct new target exhaust temperature to initial set target exhaust temperature, so that the exhaust temperature that air-conditioning is final again Degree meets the needs of heat exchange.
S312, air-conditioning system maintain current operating conditions constant.This flow terminates.
Optionally, in the adjustment process shown by the above embodiment of the present invention, the third throttling dress of cooling branch road It sets and is closed, at this point, cooling branch is blocked, there is no or only a small amount of refrigerant to flow through, at this point, mainly electrical control member Heat exchange is carried out between fluid reservoir, therefore, the adjustment process of above-mentioned multiple embodiments mainly considers electrical control member and fluid reservoir Operation of heat exchange when being impacted to air conditioning performance.
Embodiment (two)
Fig. 4 is the flow diagram one of the control method of the air-conditioning system of the present invention shown by embodiment (two).
As shown in figure 4, the present invention also provides the control method of another air-conditioning system, the main control of the control method Flow may include：
S401, outdoor environment temperature Tao is obtained；
In this embodiment, in the present embodiment, the outdoor unit of air-conditioning system is configured with another temperature sensor, the temperature sensing Device can be used for detecting the Current Temperatures parameter of outdoor environment, and the temperature sensing for being set to outdoor unit can be obtained in step S401 Current Temperatures parameter detected by device, and as outdoor environment temperature Tao.
Alternatively, air-conditioning system of the present invention accesses external network by home LAN, and can be from air-conditioning products service The server of quotient, or the network platform of weather data information is provided, search the outdoor environment corresponding to the coordinate position of the air-conditioning Data, outdoor environment data include the Current Temperatures parameter of outdoor environment, in this way, step S401 can be through searching obtained outdoor The Current Temperatures parameter of environment is as outdoor environment temperature Tao.
S402, heatsink temperature Tx is obtained；
In this embodiment, in the present embodiment, the outdoor unit of air-conditioning system is configured with another temperature sensor, the temperature sensing The induction end of device is set on the cooling fin of radiator, can be used for detecting the Current Temperatures parameter of the cooling fin of radiator, The Current Temperatures parameter detected by the temperature sensor can be obtained in step S402, and as heatsink temperature Tx.
In embodiment, since heatsink temperature Tx can carry out heat exchange with electrical control member, it is finally reached the temperature of the two Equal or close, therefore, heatsink temperature Tx can reflect the real time temperature of electrical control member to a certain extent, therefore, another In some embodiments, heatsink temperature Tx can also use the real time temperature data of the collected electrical control member of temperature sensor as generation It replaces.
If the temperature difference between S403, outdoor environment temperature Tao and heatsink temperature Tx is not less than preset temperature difference threshold Value, then control to adjust the aperture of throttling set, until compressor is with target exhaust temperature when being run, outdoor environment temperature Tao with Temperature difference between heatsink temperature Tx is less than preset temperature difference threshold.
Here, air-conditioning preheater system has one or more temperature difference thresholds, and temperature difference threshold can be used for characterizing and can make at electrical control member In the temperature threshold value of safe work state or the temperature threshold value of triggerable air-conditioning high temperature stoppage protection.That is, in outdoor ring Temperature difference between border temperature Tao and heatsink temperature Tx is not less than under the temperature condition of preset temperature difference threshold, electrical control member meeting In it is easily damaged, burn the non-security working condition melted or air-conditioning system may be caused to trigger high temperature stoppage protection pattern, at this point, Air-conditioning system can constitute adverse effect generally in misoperation, to operation of air conditioner performance；And it in outdoor environment temperature Tao and dissipates Temperature difference between backing temperature Tx is less than under the temperature condition of preset temperature difference threshold, and electrical control member is then in safe work state Or air-conditioning system will not trigger high temperature stoppage protection pattern, at this point, air-conditioning system is generally in normal operation, outer temperature is to air-conditioning The influence of runnability is smaller.
In this way, the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is not less than preset temperature difference threshold This electrical control member be susceptible to damage, trigger high temperature protection temperature conditions under, adjust throttling set aperture by way of, Change air-conditioning system current operating conditions, when compressor being made run with revised delivery temperature, outdoor environment temperature Tao and Temperature difference between heatsink temperature Tx is less than preset temperature difference threshold, and the temperature protection so as to meet electrical control member simultaneously is wanted It asks and air-conditioning system is for the performance requirement of compressor exhaust temperature, the effective guarantee safe and effective fortune of air-conditioning system entirety Row.
Optionally, if the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold Value, at this point, air-conditioning is in normal operating condition, then can adjust the current exhaust gas temperature of compressor to target exhaust temperature, make It meets the temperature requirement of the refrigerant heat exchange of air-conditioning；Therefore, control method further includes：Control reduces the section of the inflow side of flash evaporation The aperture of device is flowed, until reaching the target exhaust temperature of compressor.
Here, air-conditioning system is built-in with the programs such as the operation algorithm of target exhaust temperature, by obtaining set by user One or more parameter, the target exhaust temperature for the compressor for being applicable in current working can be calculated automatically from, for example, empty Adjusting system is equipped with a temperature map table, which can be used for characterizing the mapping of user's set temperature and the delivery temperature of compressor Setup parameter corresponding to relationship and each delivery temperature, for example, when user's set temperature is 23 DEG C, the compression of mapping The delivery temperature of machine is 70 DEG C；When user's set temperature is 26 DEG C, the delivery temperature of the compressor of mapping is 65 DEG C, etc.. After user's set temperature determines, you can the delivery temperature of compressor and its corresponding setup parameter are determined according to mapping table, The operation for adjusting the associated components of air-conditioning system, makes the actual exhaust air temperature of compressor reach the delivery temperature.Here, the exhaust Temperature is target exhaust temperature above-mentioned.
Here, user's set temperature is the preferred temperature that user is inputted by remote controler or control panel to air-conditioning system Parameter.
Alternatively, according to outdoor environment temperature Tao and default rule, determine that target exhaust temperature, default rule are used for Characterize the incidence relation of outdoor environment temperature Tao and target exhaust temperature.
It should be understood that the method for determination of above-mentioned target exhaust temperature is not limited to above-mentioned mapping table, can also pass through The mapping relations of other parameters or other algorithms, which calculate, determines target exhaust temperature, and the invention is not limited thereto.
It in the present embodiment, first can be according to above-mentioned setup parameter by the exhaust of compressor after air-conditioning booting operation Temperature is adjusted to target exhaust temperature, later, with the continuous service of air-conditioning and the lasting variation of outdoor temperature, the temperature of electrical control member Degree also changes therewith, and therefore, the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is also constantly changing, this is just So that the temperature for flowing back to the refrigerant of compressor is not unique constant yet, therefore, the compressor of air-conditioning system is in one section of operation After duration, although being still to be run with setup parameter, its actual delivery temperature is not often inconsistent with target exhaust temperature, and Readjust that the variable suffered by setup parameter is also more, process is complicated and most of air-conditioning systems do not set relevant secondary calculating Algorithm, therefore, the present invention is not under the premise of resetting the setup parameter of air-conditioning system, by adjusting throttling set wherein One or several apertures changes the refrigerant temperature for flowing back to compressor, so that the actual exhaust air temperature of the compressor after adjusting It can be consistent with target exhaust temperature, to meet the heat exchange demand of air-conditioning, be effectively simplified the Secondary Control stream to delivery temperature Journey.
Specifically, by way of the aperture of throttling set of the present invention controlling the inflow side for reducing flash evaporation, to reach Change the purpose of the target exhaust temperature of compressor.Here, when air-conditioning is with different run-modes, refrigerant is in the first pipeline Interior flow direction is also different, for example, in air-conditioning system structure shown in Fig. 1, when air-conditioning is run in a chiller mode, refrigerant is first Flow direction in pipeline is to flow from left to right, at this point, the side residing for first throttling device is the inflow side of flash evaporation, second saves Flow the outflow side that the side residing for device is flash evaporation；And when air-conditioning is run with heating mode, refrigerant is in the first pipeline Flow direction is that right-to-left flows, at this point, outflow side of the side residing for first throttling device for flash evaporation, second throttling device institute The side at place is the inflow side of flash evaporation.
Therefore, when air-conditioning is run in a chiller mode, when meeting working condition above-mentioned, then reduction first throttle is controlled The aperture of device；When air-conditioning is run with heating mode, then the aperture for lowering second throttling device is controlled.
Here, after flowing through throttling set, the temperature and pressure of itself declines refrigerant.Therefore, by reducing shwoot The aperture of the throttling set of the inflow side of side, can reduce the temperature and pressure for the refrigerant for flowing into flash evaporation, and can further drop The temperature and pressure of the low refrigerant for flowing back to compressor, in this way, by the above-mentioned means, can be by the actual exhaust air temperature tune of compressor It saves to target exhaust temperature.
Optionally, the aperture of the throttling set of the inflow side of flash evaporation can be gradually decrease to a certain open with the rate of setting Number of degrees value, alternatively, directly the aperture of the throttling set of inflow side is reduced in one or more aperture numerical value of setting, until The actual exhaust air temperature of compressor reaches target exhaust temperature.
Optionally, when the throttling set of the inflow side of flash evaporation is reduced with the rate that sets, which can be according to Preset rule is predefined, for example, rate is in certain preset ratio relationship with temperature difference, in this way, in the temperature difference After value determines, so that it may with the rate set according to the preset ratio relationship, and throttling set is reduced according to the rate Aperture, so that the delivery temperature of compressor reaches target exhaust temperature.
In a kind of optional embodiment, the aperture of throttling set is controlled to adjust in step S403, including：It controls to adjust The aperture of the third throttling set of cooling branch.By the aperture of the third throttling set of the cooling branch of adjusting, stream can be adjusted The parameters such as the temperature and pressure of refrigerant through cooling branch, it is cold to electrical control member assist using the refrigerant for flowing through cooling branch But, electrical control member is made to may be at safe working temperature；And the temperature and pressure for the refrigerant for flowing back to compressor can be further adjusted, In this way, by the above-mentioned means, can the actual exhaust air temperature of compressor be adjusted to target exhaust temperature.
Preferably, the aperture of the third throttling set of cooling branch is controlled to adjust, including：Third throttling set is controlled to set Fixed pulse rate is opened.In this way, the parameters such as the temperature and pressure of refrigerant can be allow more smoothly to change, avoid the occurrence of Refrigerant parameter abrupt change is adversely affected caused by air-conditioning system.
Fig. 5 is the flow diagram two of the control method of the air-conditioning system of the present invention shown by embodiment (two).
As shown in figure 5, the main control flow of another control method provided by the invention may include：
S501, air-conditioning are run in a chiller mode；
S502, outdoor environment temperature Tao is obtained；
S503, heatsink temperature Tx is obtained；
S504, the temperature difference △ t for calculating outdoor environment temperature Tao and heatsink temperature Tx；
S505, judge whether temperature difference △ t are not less than temperature difference threshold △ T, if so, S506 is thened follow the steps, if not, Then follow the steps S507；
S506, the aperture for adjusting third throttling set, and return to step S502；
In the present embodiment, the mode of the aperture of adjusting third throttling set is：It is opened simultaneously with the pulse rate v/s of setting Gradually increase the aperture of third throttling set；
S507, the aperture k for reducing first throttling device；
S508, the current exhaust gas temperature for obtaining compressor；
S509, judge whether the current exhaust gas temperature of compressor reaches target exhaust temperature, if so, thening follow the steps S509, if not, thening follow the steps S510；
S510, air-conditioning system maintain current operating conditions constant.This flow terminates.
Optionally, in the adjustment process shown by the above embodiment of the present invention, the third throttling dress of cooling branch road It sets and is initially being closed, cooling branch is blocked, and there is no or only a small amount of refrigerant to flow through, at this point, mainly electricity Heat exchange is carried out between control and fluid reservoir；When meeting temperature difference Rule of judgment above-mentioned, then the heat dissipation of cooling branch road is opened Device carries out supplement heat rejecter operation to electrical control member, and the temperature of electrical control member is reduced to safe temperature range；And then pass through tune The mode for saving other throttling sets adjusts the delivery temperature of the compressor of air-conditioning system to target exhaust temperature, makes its satisfaction The desired heat exchange property requirement of user.
Embodiment (three)
Fig. 6 is the flow diagram one of the control method of the air-conditioning system of the present invention shown by embodiment (three).
As shown in fig. 6, the present invention also provides the control method of another air-conditioning system, the main control of the control method Flow may include：
S601, outdoor environment temperature Tao is obtained；
In this embodiment, in the present embodiment, the outdoor unit of air-conditioning system is configured with another temperature sensor, the temperature sensing Device can be used for detecting the Current Temperatures parameter of outdoor environment, and the temperature sensing for being set to outdoor unit can be obtained in step S601 Current Temperatures parameter detected by device, and as outdoor environment temperature Tao.
Alternatively, air-conditioning system of the present invention accesses external network by home LAN, and can be from air-conditioning products service The server of quotient, or the network platform of weather data information is provided, search the outdoor environment corresponding to the coordinate position of the air-conditioning Data, outdoor environment data include the Current Temperatures parameter of outdoor environment, in this way, step S601 can be through searching obtained outdoor The Current Temperatures parameter of environment is as outdoor environment temperature Tao.
S602, heatsink temperature Tx is obtained；
In this embodiment, in the present embodiment, the outdoor unit of air-conditioning system is configured with another temperature sensor, the temperature sensing The induction end of device is set on the cooling fin of radiator, can be used for detecting the Current Temperatures parameter of the cooling fin of radiator, The Current Temperatures parameter detected by the temperature sensor can be obtained in step S602, and as heatsink temperature Tx.
In embodiment, since heatsink temperature Tx can carry out heat exchange with electrical control member, it is finally reached the temperature of the two Equal or close, therefore, heatsink temperature Tx can reflect the real time temperature of electrical control member to a certain extent, therefore, another In some embodiments, heatsink temperature Tx can also use the real time temperature data of the collected electrical control member of temperature sensor as generation It replaces.
If the temperature difference between S603, outdoor environment temperature Tao and heatsink temperature Tx is not less than preset temperature difference threshold Value, then correct the target superheat degree of air-conditioning system, and control to adjust the aperture of throttling set, until air-conditioning system is with revised When the degree of superheat is run, the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold.
In an optional embodiment, degree of superheat when air-conditioning system initial launch can influence heatsink temperature indirectly Tx.Air-conditioning determines the initial uncorrected degree of superheat by a mapping table, and here, mapping table includes multiple compressors Running frequency value either each running frequency value of value range or value range correspond to a degree of superheat numerical value.In this way, in air-conditioning system When system booting operation, the initial launch frequency of compressor can be determined according to the setup parameter of air-conditioning, later, be reflected according to above-mentioned Penetrate relation table, so that it may to further determine that the initial uncorrected degree of superheat；Therefore, to the mesh of air-conditioning system in step S603 Mark the degree of superheat be modified be the uncorrected degree of superheat initial to this amendment operation.
Alternatively, in another embodiment, after air-conditioning system booting operation, the degree of superheat can also in the following manner really It is fixed：Detect the inner coil pipe temperature of the suction temperature and air-conditioning system of compressor；The difference of suction temperature and inner coil pipe temperature is calculated, Obtain the degree of superheat.
Here, the air entry of compressor is equipped with a temperature sensor, which can be used for monitoring compressor in real time Suction temperature；Meanwhile the inner coil pipe of the indoor unit of air-conditioning system also is provided with a temperature sensor, which can be used for The temperature of monitoring inner coil pipe in real time；Therefore, pass through two temperature sensors of above-mentioned setting, so that it may obtain the air-breathing temperature of compressor The inner coil pipe temperature of degree and air-conditioning system, further, by the difference for calculating suction temperature and inner coil pipe temperature, so that it may with To the degree of superheat.
Here, air-conditioning preheater system has one or more temperature difference thresholds, and temperature difference threshold can be used for characterizing and can make at electrical control member In the temperature threshold value of safe work state or the temperature threshold value of triggerable air-conditioning high temperature stoppage protection.That is, in outdoor ring Temperature difference between border temperature Tao and heatsink temperature Tx is not less than under the temperature condition of preset temperature difference threshold, electrical control member meeting In it is easily damaged, burn the non-security working condition melted or air-conditioning system may be caused to trigger high temperature stoppage protection pattern, at this point, Air-conditioning system can constitute adverse effect generally in misoperation, to operation of air conditioner performance；And it in outdoor environment temperature Tao and dissipates Temperature difference between backing temperature Tx is less than under the temperature condition of preset temperature difference threshold, and electrical control member is then in safe work state Or air-conditioning system will not trigger high temperature stoppage protection pattern, at this point, air-conditioning system is generally in normal operation, outer temperature is to air-conditioning The influence of runnability is smaller.
In this way, the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is not less than preset temperature difference threshold This electrical control member be susceptible to damage, trigger high temperature protection temperature conditions under, pass through correct the degree of superheat and adjust throttling set Aperture mode, change the current operating conditions of air-conditioning system, it is outdoor when air-conditioning system being made to be run with the revised degree of superheat Temperature difference between environment temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold, automatically controlled so as to meet simultaneously The temperature protection of part requires and air-conditioning system is for the performance requirement of the degree of superheat, the effective guarantee safety of air-conditioning system entirety Effectively operation.
Optionally, if the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold Value, at this point, air-conditioning is in normal operating condition, then can adjust the current exhaust gas temperature of compressor to target exhaust temperature, make It meets the temperature requirement of the refrigerant heat exchange of air-conditioning；Therefore, control method further includes：Maintain current operating status constant.
In a kind of optional embodiment, the aperture of throttling set is controlled to adjust, including：Control reduces the stream of flash evaporation Enter the aperture of the throttling set of side.
Specifically, by way of the aperture of throttling set of the present invention controlling the inflow side for reducing flash evaporation, to reach Change the purpose of the target exhaust temperature of compressor.Here, when air-conditioning is with different run-modes, refrigerant is in the first pipeline Interior flow direction is also different, for example, in air-conditioning system structure shown in Fig. 1, when air-conditioning is run in a chiller mode, refrigerant is first Flow direction in pipeline is to flow from left to right, at this point, the side residing for first throttling device is the inflow side of flash evaporation, second saves Flow the outflow side that the side residing for device is flash evaporation；And when air-conditioning is run with heating mode, refrigerant is in the first pipeline Flow direction is that right-to-left flows, at this point, outflow side of the side residing for first throttling device for flash evaporation, second throttling device institute The side at place is the inflow side of flash evaporation.
Therefore, when air-conditioning is run in a chiller mode, when meeting working condition above-mentioned, then reduction first throttle is controlled The aperture of device；When air-conditioning is run with heating mode, then the aperture for lowering second throttling device is controlled.
Here, after flowing through throttling set, the temperature and pressure of itself declines refrigerant.Therefore, by reducing shwoot The aperture of the throttling set of the inflow side of side, can reduce the temperature and pressure for the refrigerant for flowing into flash evaporation, and can further drop The temperature and pressure of the low refrigerant for flowing back to fluid reservoir, in this way, by the above-mentioned means, can be by the practical degree of superheat of air-conditioning system It is adjusted to the target superheat degree obtained after correcting.
Optionally, the aperture of the throttling set of the inflow side of flash evaporation can be gradually decrease to a certain open with the rate of setting Number of degrees value, alternatively, directly the aperture of the throttling set of inflow side is reduced in one or more aperture numerical value of setting, until The practical degree of superheat of air-conditioning system reaches the target superheat degree obtained after amendment.
Optionally, when the throttling set of the inflow side of flash evaporation is reduced with the rate that sets, which can be according to Preset rule is predefined, for example, rate is in certain preset ratio relationship with temperature difference, in this way, in the temperature difference After value determines, so that it may with the rate set according to the preset ratio relationship, and throttling set is reduced according to the rate Aperture, so that the degree of superheat of air-conditioning system reaches the target exhaust temperature obtained after amendment.
In a kind of optional embodiment, the target superheat degree of air-conditioning system is corrected, including：By the fortune for adjusting compressor Row parameter, control reduce target superheat degree to correction value, and correction value is the revised degree of superheat.
Here, the operating parameter of compressor includes but not limited to：Operation power, working voltage or the operation electricity of compressor Stream.
In the present embodiment, air-conditioning system prestores multiple correction values, and multiple correction values are arranged in sequence, As from big to small.In this way, the degree of superheat of air-conditioning system can be successively reduced to above-mentioned each correction value, and throttled by adjusting Device judges after being modified operation and adjusting operation, if meet outdoor environment temperature Tao and heatsink temperature Tx it Between temperature difference be less than preset temperature difference threshold this condition, if it is satisfied, then using current correction value as target superheat degree； If conditions are not met, then by the degree of superheat from current correction value amendment to next correction value, and repeat the tune of above-mentioned throttling set Section operation, until meet temperature difference between outdoor environment temperature Tao and heatsink temperature Tx be less than preset temperature difference threshold this One condition.
Preferably, the difference between multiple correction values of sequential tapers off rule, i.e., amendment width when correcting every time Degree is gradually reduced, this way it is possible to avoid the problem of needs caused by amendment excess are reversely corrected, reduces and correct operation Overall execution number.
Fig. 7 is the flow diagram two of the control method of the air-conditioning system of the present invention shown by embodiment (three).
As shown in fig. 7, the main control flow of another control method provided by the invention may include：
S701, air-conditioning are run in a chiller mode；
S702, outdoor environment temperature Tao is obtained；
S703, heatsink temperature Tx is obtained；
S704, the temperature difference △ t for calculating outdoor environment temperature Tao and heatsink temperature Tx；
S705, judge whether temperature difference △ t are not less than temperature difference threshold △ T, if so, S706 is thened follow the steps, if not, Then follow the steps S709；
S706, by the degree of superheat amendment of air-conditioning system to correction value SHn；
Here, SHn includes the SH of sequential1... ..., SHn；
S707, n=n+1；
S708, the aperture for reducing first throttling device return to step S702 to K1；
S709, air-conditioning system maintain current operating conditions constant.This flow terminates.
Optionally, in the adjustment process shown by the above embodiment of the present invention, the third throttling dress of cooling branch road It sets and is closed, at this point, cooling branch is blocked, there is no or only a small amount of refrigerant to flow through, at this point, mainly electrical control member Heat exchange is carried out between fluid reservoir, therefore, the adjustment process of above-mentioned multiple embodiments mainly considers electrical control member and fluid reservoir Operation of heat exchange when being impacted to air conditioning performance.
Embodiment (four)
Fig. 8 is the flow diagram one of the control method of the air-conditioning system of the present invention shown by embodiment (four).
As shown in figure 8, the present invention also provides the control method of another air-conditioning system, the main control of the control method Flow may include：
S801, outdoor environment temperature Tao is obtained；
In this embodiment, in the present embodiment, the outdoor unit of air-conditioning system is configured with another temperature sensor, the temperature sensing Device can be used for detecting the Current Temperatures parameter of outdoor environment, and the temperature sensing for being set to outdoor unit can be obtained in step S801 Current Temperatures parameter detected by device, and as outdoor environment temperature Tao.
Alternatively, air-conditioning system of the present invention accesses external network by home LAN, and can be from air-conditioning products service The server of quotient, or the network platform of weather data information is provided, search the outdoor environment corresponding to the coordinate position of the air-conditioning Data, outdoor environment data include the Current Temperatures parameter of outdoor environment, in this way, step S801 can be through searching obtained outdoor The Current Temperatures parameter of environment is as outdoor environment temperature Tao.
S802, heatsink temperature Tx is obtained；
In this embodiment, in the present embodiment, the outdoor unit of air-conditioning system is configured with another temperature sensor, the temperature sensing The induction end of device is set on the cooling fin of radiator, can be used for detecting the Current Temperatures parameter of the cooling fin of radiator, The Current Temperatures parameter detected by the temperature sensor can be obtained in step S802, and as heatsink temperature Tx.
In embodiment, since heatsink temperature Tx can carry out heat exchange with electrical control member, it is finally reached the temperature of the two Equal or close, therefore, heatsink temperature Tx can reflect the real time temperature of electrical control member to a certain extent, therefore, another In some embodiments, heatsink temperature Tx can also use the real time temperature data of the collected electrical control member of temperature sensor as generation It replaces.
If the temperature difference between S803, outdoor environment temperature Tao and heatsink temperature Tx is not less than preset temperature difference threshold Value, then control to adjust the aperture of throttling set, until compressor is with target superheat degree when run, outdoor environment temperature Tao with it is scattered Temperature difference between backing temperature Tx is less than preset temperature difference threshold.
In an optional embodiment, degree of superheat when air-conditioning system initial launch can influence heatsink temperature indirectly Tx.Air-conditioning determines the initial degree of superheat by a mapping table, and here, mapping table includes the operation frequency of multiple compressors Either each running frequency value of value range or value range correspond to a degree of superheat numerical value to rate value.It is transported in this way, being switched in air-conditioning system When row, the initial launch frequency of compressor can be determined according to the setup parameter of air-conditioning, later, according to above-mentioned mapping relations Table, so that it may to further determine that the initial degree of superheat.
Alternatively, in another embodiment, after air-conditioning system booting operation, the degree of superheat can also in the following manner really It is fixed：Detect the inner coil pipe temperature of the suction temperature and air-conditioning system of compressor；The difference of suction temperature and inner coil pipe temperature is calculated, Obtain the degree of superheat.
Here, the air entry of compressor is equipped with a temperature sensor, which can be used for monitoring compressor in real time Suction temperature；Meanwhile the inner coil pipe of the indoor unit of air-conditioning system also is provided with a temperature sensor, which can be used for The temperature of monitoring inner coil pipe in real time；Therefore, pass through two temperature sensors of above-mentioned setting, so that it may obtain the air-breathing temperature of compressor The inner coil pipe temperature of degree and air-conditioning system, further, by the difference for calculating suction temperature and inner coil pipe temperature, so that it may with To the degree of superheat.
Here, air-conditioning preheater system has one or more temperature difference thresholds, and temperature difference threshold can be used for characterizing and can make at electrical control member In the temperature threshold value of safe work state or the temperature threshold value of triggerable air-conditioning high temperature stoppage protection.That is, in outdoor ring Temperature difference between border temperature Tao and heatsink temperature Tx is not less than under the temperature condition of preset temperature difference threshold, electrical control member meeting In it is easily damaged, burn the non-security working condition melted or air-conditioning system may be caused to trigger high temperature stoppage protection pattern, at this point, Air-conditioning system can constitute adverse effect generally in misoperation, to operation of air conditioner performance；And it in outdoor environment temperature Tao and dissipates Temperature difference between backing temperature Tx is less than under the temperature condition of preset temperature difference threshold, and electrical control member is then in safe work state Or air-conditioning system will not trigger high temperature stoppage protection pattern, at this point, air-conditioning system is generally in normal operation, outer temperature is to air-conditioning The influence of runnability is smaller.
In this way, the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is not less than preset temperature difference threshold This electrical control member be susceptible to damage, trigger high temperature protection temperature conditions under, adjust throttling set aperture by way of, The current operating conditions for changing air-conditioning system, when air-conditioning system being made run with target superheat degree, outdoor environment temperature Tao with it is scattered Temperature difference between backing temperature Tx is less than preset temperature difference threshold, so as to meet the temperature protection requirement of electrical control member simultaneously And air-conditioning system is for the performance requirement of the degree of superheat, the effective guarantee safe and effective operation of air-conditioning system entirety.
Optionally, if the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold Value, at this point, air-conditioning is in normal operating condition, then can adjust the current exhaust gas temperature of compressor to target exhaust temperature, make It meets the temperature requirement of the refrigerant heat exchange of air-conditioning；Therefore, control method further includes：Maintain current operating status constant.
In a kind of optional embodiment, the aperture of throttling set is controlled to adjust in step S803, including：It controls to adjust The aperture of the third throttling set of cooling branch.By the aperture of the third throttling set of the cooling branch of adjusting, stream can be adjusted The parameters such as the temperature and pressure of refrigerant through cooling branch, it is cold to electrical control member assist using the refrigerant for flowing through cooling branch But, electrical control member is made to may be at safe working temperature；And the temperature and pressure for the refrigerant for flowing back to compressor can be further adjusted, In this way, by the above-mentioned means, can the practical degree of superheat of air-conditioning be adjusted to target exhaust temperature.
Preferably, the aperture of the third throttling set of cooling branch is controlled to adjust, including：Third throttling set is controlled to set Fixed pulse rate is opened.In this way, the parameters such as the temperature and pressure of refrigerant can be allow more smoothly to change, avoid the occurrence of Refrigerant parameter abrupt change is adversely affected caused by air-conditioning system.
Fig. 9 is the flow diagram two of the control method of the air-conditioning system of the present invention shown by embodiment (four).
As shown in figure 9, the main control flow of another control method provided by the invention may include：
S901, air-conditioning are run in a chiller mode；
S902, outdoor environment temperature Tao is obtained；
S903, heatsink temperature Tx is obtained；
S904, the temperature difference △ t for calculating outdoor environment temperature Tao and heatsink temperature Tx；
S905, judge whether temperature difference △ t are not less than temperature difference threshold △ T, if so, S906 is thened follow the steps, if not, Then follow the steps S907；
S906, the aperture for adjusting third throttling set, and return to step S902；
In the present embodiment, the mode of the aperture of adjusting third throttling set is：It is opened simultaneously with the pulse rate v/s of setting Gradually increase the aperture of third throttling set；
S907, air-conditioning system maintain current operating conditions constant.This flow terminates.
Optionally, in the adjustment process shown by the above embodiment of the present invention, the third throttling dress of cooling branch road It sets and is initially being closed, cooling branch is blocked, and there is no or only a small amount of refrigerant to flow through, at this point, mainly electricity Heat exchange is carried out between control and fluid reservoir；When meeting temperature difference Rule of judgment above-mentioned, then the heat dissipation of cooling branch road is opened Device carries out supplement heat rejecter operation to electrical control member, and the temperature of electrical control member is reduced to safe temperature range；And then pass through tune The mode for saving other throttling sets adjusts the degree of superheat of air-conditioning system to target superheat degree, and so that it is met, user is desired to be changed Performance requirements.
Embodiment (five)
Figure 10 is the flow diagram one of the control method of the air-conditioning system of the present invention shown by embodiment (five).
As shown in Figure 10, the present invention also provides the control method of another air-conditioning system, the main controls of the control method Flow processed may include：
S1001, outdoor environment temperature Tao is obtained；
In this embodiment, in the present embodiment, the outdoor unit of air-conditioning system is configured with another temperature sensor, the temperature sensing Device can be used for detecting the Current Temperatures parameter of outdoor environment, and the temperature for being set to outdoor unit biography can be obtained in step S1001 Current Temperatures parameter detected by sensor, and as outdoor environment temperature Tao.
Alternatively, air-conditioning system of the present invention accesses external network by home LAN, and can be from air-conditioning products service The server of quotient, or the network platform of weather data information is provided, search the outdoor environment corresponding to the coordinate position of the air-conditioning Data, outdoor environment data include the Current Temperatures parameter of outdoor environment, in this way, step S1001 can be through searching obtained room The Current Temperatures parameter of external environment is as outdoor environment temperature Tao.
S1002, heatsink temperature Tx is obtained；
In this embodiment, in the present embodiment, the outdoor unit of air-conditioning system is configured with another temperature sensor, the temperature sensing The induction end of device is set on the cooling fin of radiator, can be used for detecting the Current Temperatures parameter of the cooling fin of radiator, The Current Temperatures parameter detected by the temperature sensor can be obtained in step S1002, and as heatsink temperature Tx.
In embodiment, since heatsink temperature Tx can carry out heat exchange with electrical control member, it is finally reached the temperature of the two Equal or close, therefore, heatsink temperature Tx can reflect the real time temperature of electrical control member to a certain extent, therefore, another In some embodiments, heatsink temperature Tx can also use the real time temperature data of the collected electrical control member of temperature sensor as generation It replaces.
If the temperature difference between S1003, outdoor environment temperature Tao and heatsink temperature Tx is not less than preset temperature difference threshold Value then determines regulations speed according to temperature difference, and controls to adjust third throttling set according to determining regulations speed, until outdoor Temperature difference between environment temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold.
Here, air-conditioning preheater system has one or more temperature difference thresholds, and temperature difference threshold can be used for characterizing and can make at electrical control member In the temperature threshold value of safe work state or the temperature threshold value of triggerable air-conditioning high temperature stoppage protection.That is, in outdoor ring Temperature difference between border temperature Tao and heatsink temperature Tx is not less than under the temperature condition of preset temperature difference threshold, electrical control member meeting In it is easily damaged, burn the non-security working condition melted or air-conditioning system may be caused to trigger high temperature stoppage protection pattern, at this point, Air-conditioning system can constitute adverse effect generally in misoperation, to operation of air conditioner performance；And it in outdoor environment temperature Tao and dissipates Temperature difference between backing temperature Tx is less than under the temperature condition of preset temperature difference threshold, and electrical control member is then in safe work state Or air-conditioning system will not trigger high temperature stoppage protection pattern, at this point, air-conditioning system is generally in normal operation, outer temperature is to air-conditioning The influence of runnability is smaller.
In this way, the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is not less than preset temperature difference threshold This electrical control member be susceptible to damage, trigger high temperature protection temperature conditions under, adjust throttling set aperture by way of, The current operating conditions for changing air-conditioning system, keep the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx small In preset temperature difference threshold, the temperature protection so as to meet electrical control member simultaneously requires and the performance requirement of air-conditioning system, The effective guarantee safe and effective operation of air-conditioning system entirety.
Optionally, regulations speed is determined according to temperature difference in step S1003, specifically may include：
Regulations speed is calculated according to following formula：
Wherein, v is regulations speed, and △ t are temperature difference.
For example, when △ t are 5 DEG C, then it is 15.7 pulses/s to substitute into above-mentioned calculation formula and regulations speed can be calculated.
In this way, i.e. in the case where meeting above-mentioned temperature difference judgement situation, the third throttling set of cooling branch road is opened and with 15.7 The regulations speed of pulse/s improves the valve degree of third throttling set；Meanwhile it being repeated as many times during adjusting valve and obtaining outdoor environment Temperature Tao and heatsink temperature Tx then ties up third throttling set until the temperature difference between the two is less than preset temperature difference threshold It holds constant in current valve opening.
Optionally, if the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold Value, at this point, air-conditioning is in normal operating condition, then can adjust the current exhaust gas temperature of compressor to target exhaust temperature, make It meets the temperature requirement of the refrigerant heat exchange of air-conditioning；Therefore, control method further includes：Maintain current operating status constant.
Optionally, when the temperature difference between outer environment temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold, Control method further includes：The aperture of the throttling set of the inflow side of adjusting control flash evaporation, until compressor reaches target exhaust Temperature.
Alternatively, when the temperature difference between outer environment temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold, control Method processed further includes：The aperture of the throttling set of the inflow side of adjusting control flash evaporation, until air-conditioning system reaches target superheat Degree.
Specifically, by way of the aperture of throttling set of the present invention controlling the inflow side for reducing flash evaporation, to reach Change the target exhaust temperature of compressor or the purpose of the target superheat degree of air-conditioning system.Here, air-conditioning is with different operations When pattern works, flow direction of the refrigerant in the first pipeline is also different, for example, in air-conditioning system structure shown in Fig. 1, air-conditioning with When refrigeration mode is run, flow direction of the refrigerant in the first pipeline is to flow from left to right, at this point, one residing for first throttling device Side is the inflow side of flash evaporation, and the side residing for second throttling device is the outflow side of flash evaporation；And in air-conditioning with heating mode When operation, flow direction of the refrigerant in the first pipeline flows for right-to-left, at this point, the side residing for first throttling device is shwoot The outflow side of device, the side residing for second throttling device are the inflow side of flash evaporation.
Therefore, when air-conditioning is run in a chiller mode, when meeting working condition above-mentioned, then reduction first throttle is controlled The aperture of device；When air-conditioning is run with heating mode, then the aperture for lowering second throttling device is controlled.
Here, after flowing through throttling set, the temperature and pressure of itself declines refrigerant.Therefore, by reducing shwoot The aperture of the throttling set of the inflow side of side, can reduce the temperature and pressure for the refrigerant for flowing into flash evaporation, and can further drop The temperature and pressure of the low refrigerant for flowing back to compressor, in this way, by the above-mentioned means, can be by the actual exhaust air temperature tune of compressor Section is to target exhaust temperature, or the practical degree of superheat of air-conditioning system is made to reach target superheat degree.
Optionally, the aperture of the throttling set of the inflow side of flash evaporation can be gradually decrease to a certain open with the rate of setting Number of degrees value, alternatively, directly the aperture of the throttling set of inflow side is reduced in one or more aperture numerical value of setting, until The actual exhaust air temperature of compressor reaches target exhaust temperature, or the practical degree of superheat of air-conditioning system is made to reach target superheat.
Optionally, when the throttling set of the inflow side of flash evaporation is reduced with the rate that sets, which can be according to Preset rule is predefined, for example, rate is in certain preset ratio relationship with temperature difference, in this way, in the temperature difference After value determines, so that it may with the rate set according to the preset ratio relationship, and throttling set is reduced according to the rate Aperture so that the delivery temperature of compressor reaches target exhaust temperature, or makes the practical degree of superheat of air-conditioning system reach target Overheat.
Figure 11 is the flow diagram two of the control method of the air-conditioning system of the present invention shown by embodiment (five).
As shown in figure 11, the main control flow of another control method provided by the invention may include：
S1101, air-conditioning are run in a chiller mode；
S1102, outdoor environment temperature Tao is obtained；
S1103, heatsink temperature Tx is obtained；
S1104, the temperature difference △ t for calculating outdoor environment temperature Tao and heatsink temperature Tx；
S1105, judge whether temperature difference △ t are not less than temperature difference threshold △ T, if so, S1106 is thened follow the steps, if It is no, then follow the steps S1118；
S1106, regulations speed is calculated by following equation：
S1107, third throttling set is opened, and its valve opening is improved with regulations speed v, continue 3s；It returns to step S1102；
Here, it after third throttling set is opened and executes the operation for improving valve degree, is repeated once at interval of 3s above-mentioned Step S1102-S1105；In executing above-mentioned cyclic process for the first time, execute open third throttling set operation, for the first time it In the cyclic process of other outer order, then the operation that its valve opening is improved with regulations speed v and continues 3s is only executed；
S1108, maintain the current operating conditions of air-conditioning system constant；This flow terminates.
Embodiment (six)
Figure 12 is the flow diagram one of the control method of the air-conditioning system of the present invention shown by embodiment (six).
As shown in figure 12, the present invention also provides the control method of another air-conditioning system, the main controls of the control method Flow processed may include：
S1201, outdoor temperature Tao is obtained；
In this embodiment, in the present embodiment, the outdoor unit of air-conditioning system is configured with another temperature sensor, the temperature sensing Device can be used for detecting the Current Temperatures parameter of outdoor environment, and the temperature for being set to outdoor unit biography can be obtained in step S1201 Current Temperatures parameter detected by sensor, and as outdoor temperature Tao.
Alternatively, air-conditioning system of the present invention accesses external network by home LAN, and can be from air-conditioning products service The server of quotient, or the network platform of weather data information is provided, search the outdoor environment corresponding to the coordinate position of the air-conditioning Data, outdoor environment data include the Current Temperatures parameter of outdoor environment, in this way, step S1201 can be through searching obtained room The Current Temperatures parameter of external environment is as outdoor temperature Tao.
S1202, outside humidity RH is obtained；
In this embodiment, in the present embodiment, the outdoor unit of air-conditioning system is configured with another humidity sensor, the humidity sensor Device can be used for detecting the current humidity parameter of outdoor environment, and the humidity for being set to outdoor unit biography can be obtained in step S1202 Current humidity parameter detected by sensor, and as outside humidity RH.
Alternatively, air-conditioning system of the present invention accesses external network by home LAN, and can be from air-conditioning products service The server of quotient, or the network platform of weather data information is provided, search the outdoor environment corresponding to the coordinate position of the air-conditioning Data, outdoor environment data include the current humidity parameter of outdoor environment, in this way, step S1202 can be through searching obtained room The current humidity parameter of external environment is as outside humidity RH.
S1203, according to outdoor temperature Tao and outside humidity RH, determine the start and stop shape of the third throttling set of cooling branch Valve degree when state and unlatching.
Optionally, the third throttling of cooling branch is determined according to outdoor temperature Tao and outside humidity RH in step S1203 Valve degree when the start and stop state of device and unlatching, including：
When outdoor temperature Tao is greater than or equal to preset outer temperature threshold value, or
When outdoor temperature Tao is less than outer temperature threshold value and outside humidity RH is less than preset humidity threshold,
State is shut down in the third throttling set holding of the cooling branch of control.
Under temperature and humidity conditions in the above-described embodiments, outdoor temperature is higher or outdoor temperature is low and outside humidity is low In the case of, the outdoor unit of air-conditioning is not likely to produce frosting problem at this time, therefore, merely with the refrigerant in electrical control member and liquid storage device into Row heat exchange can meet the needs of air-conditioning heating performance, so shape is shut down in the third throttling set holding of the cooling branch of control State reduces coolant distribution amount of the cooling branch to medium circulation pipeline, so that most high temperature refrigerants can be to indoor unit Chinese's gas is supplied, and ensures heating effect of the air-conditioning system to indoor environment.
Optionally, according to outdoor temperature Tao and outside humidity RH, the start and stop shape of the third throttling set of cooling branch is determined State and open when valve degree, further include：When the outside humidity RH is more than preset humidity threshold, cooling branch is controlled Third throttling set is in open state.
Under temperature and humidity conditions in the above-described embodiments, outside humidity is higher, at this point, the outdoor unit of air-conditioning easy tos produce knot White problem, therefore, control open the third throttling set of cooling branch, with using flow through the refrigerant of cooling branch and electrical control member into Row heat exchange, and the refrigerant after will heat up is transmitted back to compressor, to promote the compression of compressor using the waste heat of electrical control member Efficiency.Here, the external heat conduction efficiency of electrical control member can be improved by opening the third throttling set of cooling branch, compared to automatically controlled The refrigerant of part and liquid storage device carries out the mode of heat exchange, and the radiator of cooling branch can improve refrigerant and the heat of electrical control member is handed over Change efficiency.
Optionally, according to outdoor temperature Tao and outside humidity RH, the start and stop shape of the third throttling set of cooling branch is determined Valve degree when state and unlatching, including：According to outside humidity RH, determine that valve when third throttling set is in open state is opened Degree.
Specifically, outside humidity RH can be obtained by step S1202, later, can be calculated according to preset incidence relation To the valve opening of third throttling set, for example, a kind of optional incidence relation is K=9*RH-400, here, K is valve opening.Cause This, above-mentioned formula is substituted by outside humidity RH, you can valve opening is further calculated, if outside humidity RH is relative humidity When 50%, then it is 50 valve opening to be calculated according to above-mentioned formula, then can adjust valve opening to 50, at this point, meeting air-conditioning system The heat exchange demand of hot property.
In a kind of optional embodiment, control method further includes：Determine target superheat degree or the compression of air-conditioning system The target exhaust temperature of machine；The aperture of the throttling set of the inflow side of flash evaporation is adjusted, until air-conditioning system reaches target superheat Degree or compressor reach target exhaust temperature.
By taking target exhaust temperature as an example, air-conditioning system is built-in with the programs such as the operation algorithm of target exhaust temperature, by obtaining One or more parameter set by family is taken, the target exhaust for the compressor for being applicable in current working can be calculated automatically from Temperature, for example, air-conditioning system is equipped with a temperature map table, which can be used for characterizing the row of user's set temperature and compressor Setup parameter corresponding to the mapping relations of temperature degree and each delivery temperature, for example, when user's set temperature is 23 DEG C, The delivery temperature of its compressor mapped is 70 DEG C；When user's set temperature is 26 DEG C, the delivery temperature of the compressor of mapping It is 65 DEG C, etc..After user's set temperature determines, you can determine the delivery temperature and its correspondence of compressor according to mapping table Setup parameter, adjust the operation of the associated components of air-conditioning system, the actual exhaust air temperature of compressor made to reach the delivery temperature. Here, which is target exhaust temperature above-mentioned.
Here, user's set temperature is the preferred temperature that user is inputted by remote controler or control panel to air-conditioning system Parameter.
Alternatively, according to outdoor temperature Tao and default rule, target exhaust temperature is determined, default rule is for characterizing The incidence relation of outdoor temperature Tao and target exhaust temperature.
It should be understood that the method for determination of above-mentioned target exhaust temperature is not limited to above-mentioned mapping table, can also pass through The mapping relations of other parameters or other algorithms, which calculate, determines target exhaust temperature, and the invention is not limited thereto.
It in the present embodiment, first can be according to above-mentioned setup parameter by the exhaust of compressor after air-conditioning booting operation Temperature is adjusted to target exhaust temperature, later, with the continuous service of air-conditioning and the lasting variation of outdoor temperature, the temperature of electrical control member Degree also changes therewith, and therefore, the temperature difference between outdoor temperature Tao and heatsink temperature Tx is also constantly changing, this is allowed for The temperature for flowing back to the refrigerant of compressor is not unique constant yet, and therefore, the compressor of air-conditioning system is running one section of duration Later, although being still to be run with setup parameter, its actual delivery temperature is not often inconsistent with target exhaust temperature, and again Suffered by adjustment setup parameter variable is also more, process is complicated and most of air-conditioning systems do not set relevant secondary calculating and calculate Method, therefore, the present invention is not under the premise of resetting the setup parameter of air-conditioning system, by adjust throttling set wherein one A or several aperture changes the refrigerant temperature for flowing back to compressor, so that the actual exhaust air temperature of the compressor after adjusting can To be consistent with target exhaust temperature, to meet the heat exchange demand of air-conditioning, it is effectively simplified the Secondary Control flow to delivery temperature.
Specifically, by way of the aperture of throttling set of the present invention controlling the inflow side for reducing flash evaporation, to reach Change the purpose of the target exhaust temperature of compressor.Here, when air-conditioning is with different run-modes, refrigerant is in the first pipeline Interior flow direction is also different, for example, in air-conditioning system structure shown in Fig. 1, when air-conditioning is run in a chiller mode, refrigerant is first Flow direction in pipeline is to flow from left to right, at this point, the side residing for first throttling device is the inflow side of flash evaporation, second saves Flow the outflow side that the side residing for device is flash evaporation；And when air-conditioning is run with heating mode, refrigerant is in the first pipeline Flow direction is that right-to-left flows, at this point, outflow side of the side residing for first throttling device for flash evaporation, second throttling device institute The side at place is the inflow side of flash evaporation.
Therefore, when air-conditioning is run in a chiller mode, when meeting working condition above-mentioned, then reduction first throttle is controlled The aperture of device；When air-conditioning is run with heating mode, then the aperture for lowering second throttling device is controlled.
Here, after flowing through throttling set, the temperature and pressure of itself declines refrigerant.Therefore, by reducing shwoot The aperture of the throttling set of the inflow side of side, can reduce the temperature and pressure for the refrigerant for flowing into flash evaporation, and can further drop The temperature and pressure of the low refrigerant for flowing back to compressor, in this way, by the above-mentioned means, can be by the actual exhaust air temperature tune of compressor It saves to target exhaust temperature.
Optionally, the aperture of the throttling set of the inflow side of flash evaporation can be gradually decrease to a certain open with the rate of setting Number of degrees value, alternatively, directly the aperture of the throttling set of inflow side is reduced in one or more aperture numerical value of setting, until The actual exhaust air temperature of compressor reaches target exhaust temperature.
Optionally, when the throttling set of the inflow side of flash evaporation is reduced with the rate that sets, which can be according to Preset rule is predefined, for example, rate is in certain preset ratio relationship with temperature difference, in this way, in the temperature difference After value determines, so that it may with the rate set according to the preset ratio relationship, and throttling set is reduced according to the rate Aperture, so that the delivery temperature of compressor reaches target exhaust temperature.
Figure 13 is the structure diagram of the control device of the air-conditioning system of the present invention shown by embodiment (one).
The embodiment of the present invention (one) additionally provides a kind of control device of air-conditioning system, which can be used for controlling Air-conditioning system shown in figure 1 executes the control method disclosed in previous embodiment (one)；Control device 1300 includes：
Acquiring unit 1310, for obtaining outdoor environment temperature Tao and heatsink temperature Tx；
First control unit 1320, if not for the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx Less than preset temperature difference threshold, then the target exhaust temperature of compressor is corrected, and control to adjust the aperture of throttling set, until pressure When contracting machine is run with revised delivery temperature, the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is less than pre- If temperature difference threshold.
In a kind of optional embodiment, control device further includes the second control unit, is used for：If outdoor environment temperature Temperature difference between Tao and heatsink temperature Tx is less than preset temperature difference threshold, then controls to adjust the aperture of throttling set, until Reach the target exhaust temperature of compressor.
In a kind of optional embodiment, the first control unit 1320 is specifically used for the inflow side of control reduction flash evaporation The aperture of throttling set；
Second control unit is specifically used for the aperture of the throttling set of the inflow side of control reduction flash evaporation.
In a kind of optional embodiment, the first control unit 1320 is specifically used for：By the operation ginseng for adjusting compressor Number, control reduce the target exhaust temperature of compressor to correction value, and correction value is revised delivery temperature.
In a kind of optional embodiment, control device 1300 further includes determination unit, is used for：According to outdoor environment temperature Tao and default rule determine target exhaust temperature, and default rule is for characterizing outdoor environment temperature Tao and target exhaust The incidence relation of temperature.
Figure 14 is the structure diagram of the control device of the air-conditioning system of the present invention shown by embodiment (two).
The embodiment of the present invention (two) additionally provides a kind of control device of air-conditioning system, which can be used for controlling Air-conditioning system shown in figure 1 executes the control method disclosed in previous embodiment (two)；Control device 1400 includes：
Acquiring unit 1410, for obtaining outdoor environment temperature Tao and heatsink temperature Tx；
First control unit 1420, if not for the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx Less than preset temperature difference threshold, then the aperture of throttling set is controlled to adjust, until when compressor is run with target exhaust temperature, room Temperature difference between external environment temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold.
In a kind of optional embodiment, control device further includes the second control unit, is used for：If outdoor environment temperature Temperature difference between Tao and heatsink temperature Tx is less than preset temperature difference threshold, then controls the section for the inflow side for reducing flash evaporation The aperture of device is flowed, until reaching the target exhaust temperature of compressor.
In a kind of optional embodiment, the first control unit 1420 is specifically used for：Control to adjust the third of cooling branch The aperture of throttling set.
In a kind of optional embodiment party's example, the first control unit 1420 is specifically used for：Third throttling set is controlled to set Fixed pulse rate is opened.
In a kind of optional embodiment party's example, control device 1400 further includes determination unit, is used for：According to outdoor environment temperature Tao and default rule are spent, determines target exhaust temperature, default rule is for characterizing outdoor environment temperature Tao and target row The incidence relation of temperature degree.
Figure 15 is the structure diagram of the control device of the air-conditioning system of the present invention shown by embodiment (three).
The embodiment of the present invention (three) additionally provides a kind of control device of air-conditioning system, which can be used for controlling Air-conditioning system shown in figure 1 executes the control method disclosed in previous embodiment (three)；Control device 1500 includes：
Acquiring unit 1510, for obtaining outdoor environment temperature Tao and heatsink temperature Tx；
First control unit 1520, if not for the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx Less than preset temperature difference threshold, then the target superheat degree of air-conditioning system is corrected, and control to adjust the aperture of throttling set, until empty When adjusting system is run with the revised degree of superheat, the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is less than pre- If temperature difference threshold.
In a kind of optional embodiment, control device further includes the second control unit, is used for：If outdoor environment temperature Temperature difference between Tao and heatsink temperature Tx is less than preset temperature difference threshold, then maintains current operating status constant.
In a kind of optional embodiment, the first control unit 1420 is specifically used for：Control reduces the inflow side of flash evaporation Throttling set aperture.
In a kind of optional embodiment, the first control unit 1420 is specifically used for：By the operation ginseng for adjusting compressor Number, control reduce target superheat degree to correction value, and correction value is the revised degree of superheat.
In a kind of optional embodiment, control device 1500 further includes：
Detection unit, the inner coil pipe temperature of suction temperature and air-conditioning system for detecting compressor；
Computing unit, the difference for calculating suction temperature and inner coil pipe temperature, obtains the degree of superheat.
Figure 16 is the structure diagram of the control device of the air-conditioning system of the present invention shown by embodiment (four).
The embodiment of the present invention (four) additionally provides a kind of control device of air-conditioning system, which can be used for controlling Air-conditioning system shown in figure 1 executes the control method disclosed in previous embodiment (four)；Control device 1600 includes：
Acquiring unit 1610, for obtaining outdoor environment temperature Tao and heatsink temperature Tx；
First control unit 1620, if not for the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx Less than preset temperature difference threshold, then the aperture of throttling set is controlled to adjust, until when compressor is run with target superheat degree, it is outdoor Temperature difference between environment temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold.
In a kind of optional embodiment, control device further includes the second control unit, is used for：If outdoor environment temperature Temperature difference between Tao and heatsink temperature Tx is less than preset temperature difference threshold, then maintains current operating status constant.
In a kind of optional embodiment, the first control unit 1620 is specifically used for：Control to adjust the third of cooling branch The aperture of throttling set.
In a kind of optional embodiment, the first control unit 1620 is specifically used for：Third throttling set is controlled to set Pulse rate open.
In a kind of optional embodiment, control device 1600 further includes：
Detection unit, the inner coil pipe temperature of suction temperature and air-conditioning system for detecting compressor；
Computing unit, the difference for calculating suction temperature and inner coil pipe temperature, obtains the degree of superheat.
Figure 17 is the structure diagram of the control device of the air-conditioning system of the present invention shown by embodiment (five).
The embodiment of the present invention (five) additionally provides a kind of control device of air-conditioning system, which can be used for controlling Air-conditioning system shown in figure 1 executes the control method disclosed in previous embodiment (five)；Control device 1700 includes：
Acquiring unit 1710, for obtaining outdoor environment temperature Tao and heatsink temperature Tx；
First control unit 1720, if not for the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx Less than preset temperature difference threshold, then regulations speed is determined according to temperature difference, and third is controlled to adjust according to determining regulations speed Throttling set, until the temperature difference between outdoor environment temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold.
In a kind of optional embodiment, the first control unit 1720 further includes computing unit, is used for：According to following public affairs Regulations speed is calculated in formula：
Wherein, v is regulations speed, and △ t are temperature difference.
In a kind of optional embodiment, control device 1700 further includes the second control unit, is used for：If outdoor environment Temperature difference between temperature Tao and heatsink temperature Tx is less than preset temperature difference threshold, then maintains current operating status constant.
In a kind of optional embodiment, control device 1700 further includes third control unit, is used for：In outer environment temperature When temperature difference between Tao and heatsink temperature Tx is less than preset temperature difference threshold, the section of the inflow side of adjusting control flash evaporation The aperture of device is flowed, until compressor reaches target exhaust temperature.
In a kind of optional embodiment, control device 1700 further includes the 4th control unit, is used for：In outer environment temperature When temperature difference between Tao and heatsink temperature Tx is less than preset temperature difference threshold, the section of the inflow side of adjusting control flash evaporation The aperture of device is flowed, until air-conditioning system reaches target superheat degree.
Figure 18 is the structure diagram of the control device of the air-conditioning system of the present invention shown by embodiment (six).
The embodiment of the present invention (six) additionally provides a kind of control device of air-conditioning system, which can be used for controlling Air-conditioning system shown in figure 1 executes the control method disclosed in previous embodiment (six)；Control device 1800 includes：
Acquiring unit 1810, for obtaining outdoor temperature Tao and outside humidity RH；
First determination unit 1820, for according to outdoor temperature Tao and outside humidity RH, determining the third section of cooling branch Valve degree when flowing the start and stop state of device and opening.
In a kind of optional embodiment, the first determination unit 1820 is specifically used for：
When outdoor temperature Tao is greater than or equal to preset outer temperature threshold value, or
When outdoor temperature Tao is less than outer temperature threshold value and outside humidity RH is less than preset humidity threshold,
State is shut down in the third throttling set holding of the cooling branch of control.
In a kind of optional embodiment, the first determination unit 1820 is specifically used for：When the outside humidity RH is more than When preset humidity threshold, the third throttling set for controlling cooling branch is in open state.
In a kind of optional embodiment, the first determination unit 1820 is specifically used for：According to outside humidity RH, is determined Three throttling sets are in valve opening when open state.
In a kind of optional embodiment, control device 1800 further includes：
Second determination unit, for determining the target superheat degree of air-conditioning system or the target exhaust temperature of compressor；
Unit, the aperture of the throttling set of the inflow side for adjusting flash evaporation are adjusted, until air-conditioning system reaches target The degree of superheat or compressor reach target exhaust temperature.
It should be understood that the invention is not limited in the flow and structure that are described above and are shown in the accompanying drawings, And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is only limited by the attached claims System.

Claims (10)

1. a kind of control method of air-conditioning system, which is characterized in that air-conditioning system described in the air-conditioning system includes refrigerant circulation Circuit and cooling branch, the refrigerant circulation circuit include the indoor heat exchanger connected by refrigerant pipe, heat exchanger, four-way valve, The first end of liquid storage device and compressor, the cooling branch is connected between the indoor heat exchanger and the outdoor heat exchanger On the flash evaporation of refrigerant pipeline section, second end is connected to the input end of the liquid storage device, and the cooling line is provided with radiator； The air-conditioning system further includes electrical control member, the neighbouring setting of the electrical control member, the radiator and the liquid storage device, between three It can carry out heat exchange；The air-conditioning further includes throttling set, and the throttling set includes being changed with the outdoor set on flash evaporation The first refrigerant between hot device is in charge of the first throttling device of section, between the flash evaporation and the indoor heat exchanger Two refrigerants are in charge of the second throttling device of section, are set to the third throttling set of the cooling branch；The control method includes：
Obtain outdoor environment temperature Tao and heatsink temperature Tx；
If the temperature difference between the outdoor environment temperature Tao and the heatsink temperature Tx is not less than preset temperature difference threshold Value, then control to adjust the aperture of the throttling set, until when compressor is run with target exhaust temperature, the outdoor environment temperature The temperature difference spent between the Tao and heatsink temperature Tx is less than the preset temperature difference threshold.
2. control method according to claim 1, which is characterized in that the control method further includes：
If the temperature difference between the outdoor environment temperature Tao and the heatsink temperature Tx is less than preset temperature difference threshold, The aperture of the throttling set for the inflow side for reducing the flash evaporation is then controlled, until reaching the target exhaust temperature of the compressor Degree.
3. control method according to claim 1, which is characterized in that the aperture for controlling to adjust throttling set, including：
Control to adjust the aperture of the third throttling set of the cooling branch.
4. control method according to claim 3, which is characterized in that described to control to adjust described the of the cooling branch The aperture of three throttling sets, including：
It controls the third throttling set and is opened with the pulse rate set.
5. control method according to claim 1, which is characterized in that the control method further includes：
According to the outdoor environment temperature Tao and default rule, determine that the target exhaust temperature, the default rule are used In the incidence relation for characterizing the outdoor environment temperature Tao and the target exhaust temperature.
6. a kind of control device of air-conditioning system, which is characterized in that air-conditioning system described in the air-conditioning system includes refrigerant circulation Circuit and cooling branch, the refrigerant circulation circuit include the indoor heat exchanger connected by refrigerant pipe, heat exchanger, four-way valve, The first end of liquid storage device and compressor, the cooling branch is connected between the indoor heat exchanger and the outdoor heat exchanger On the flash evaporation of refrigerant pipeline section, second end is connected to the input end of the liquid storage device, and the cooling line is provided with radiator； The air-conditioning system further includes electrical control member, the neighbouring setting of the electrical control member, the radiator and the liquid storage device, between three It can carry out heat exchange；The air-conditioning further includes throttling set, and the throttling set includes being changed with the outdoor set on flash evaporation The first refrigerant between hot device is in charge of the first throttling device of section, between the flash evaporation and the indoor heat exchanger Two refrigerants are in charge of the second throttling device of section, are set to the third throttling set of the cooling branch；The control device includes：
Acquiring unit, for obtaining outdoor environment temperature Tao and heatsink temperature Tx；
First control unit, if not for the temperature difference between the outdoor environment temperature Tao and the heatsink temperature Tx Less than preset temperature difference threshold, then the aperture of the throttling set is controlled to adjust, until compressor is run with target exhaust temperature When, the temperature difference between the outdoor environment temperature Tao and the heatsink temperature Tx is less than the preset temperature difference threshold Value.
7. control device according to claim 6, which is characterized in that the control device further includes the second control unit, For：
If the temperature difference between the outdoor environment temperature Tao and the heatsink temperature Tx is less than preset temperature difference threshold, The aperture of the throttling set for the inflow side for reducing the flash evaporation is then controlled, until reaching the target exhaust temperature of the compressor Degree.
8. control device according to claim 6, which is characterized in that first control unit is specifically used for：
Control to adjust the aperture of the third throttling set of the cooling branch.
9. control device according to claim 8, which is characterized in that first control unit is specifically used for：
It controls the third throttling set and is opened with the pulse rate set.
10. control device according to claim 6, which is characterized in that the control device further includes determination unit, is used In：
According to the outdoor environment temperature Tao and default rule, determine that the target exhaust temperature, the default rule are used In the incidence relation for characterizing the outdoor environment temperature Tao and the target exhaust temperature.
CN201810293852.2A 2018-03-30 2018-03-30 Control method and device of air conditioning system Active CN108548294B (en)

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