CN105650819B - A kind of control method for multi-gang air-conditioner high-temperature refrigeration - Google Patents

A kind of control method for multi-gang air-conditioner high-temperature refrigeration Download PDF

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Publication number
CN105650819B
CN105650819B CN201610071151.5A CN201610071151A CN105650819B CN 105650819 B CN105650819 B CN 105650819B CN 201610071151 A CN201610071151 A CN 201610071151A CN 105650819 B CN105650819 B CN 105650819B
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machine
systemic presupposition
conditioner
machine module
service
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CN105650819A (en
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禚百田
时斌
程绍江
王军
邵文俊
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Qingdao Haier Air Conditioning Electric Co Ltd
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Qingdao Haier Air Conditioning Electric Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/65Electronic processing for selecting an operating mode
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/40Pressure, e.g. wind pressure
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

A kind of control method for multi-gang air-conditioner high-temperature refrigeration, the control method include: the operational mode and operating status of real-time detection multi-gang air-conditioner;When detecting multi-gang air-conditioner refrigerating operaton, whether the operating status for detecting multi-gang air-conditioner meets systemic presupposition first condition;When the operating status of multi-gang air-conditioner meets the systemic presupposition first condition, the heat exchange state of outer machine module and system refrigerant out of service is adjusted, wherein the compressor of outer machine module out of service keeps halted state.In the control method, heat exchange can be carried out using the condenser and system refrigerant of outer machine module out of service in the outdoor machine system of multi-gang air-conditioner, the area of heat exchange is carried out so as to increase system refrigerant and outdoor machine system, while the high-pressure that outdoor machine system is effectively reduced, the refrigeration effect of multi-gang air-conditioner itself is improved, applicability is more preferably.

Description

A kind of control method for multi-gang air-conditioner high-temperature refrigeration
Technical field
The invention belongs to multi-gang air-conditioner technical field more particularly to a kind of controls for multi-gang air-conditioner high-temperature refrigeration Method.
Background technique
For multi-gang air-conditioner in high-temperature refrigeration, since outdoor environment temperature is higher, heat dissipation effect is poor, when outer machine is run It often will cause higher high-pressure, so that system enters high voltage protective, press can only be run under lower frequency, Even alarm is shut down, and seriously reduces the refrigeration effect of air-conditioning.
For such case that multi-gang air-conditioner occurs in high-temperature refrigeration, existing method is usually by adjusting inside and outside The aperture of the electric expansion valve of machine carrys out the cold medium flux of regulating system, to reduce the high-pressure of system, but these methods exist Also it will affect the refrigeration effect of air-conditioning itself while reducing system high pressure pressure, refrigerating efficiency is lower.
So in the prior art, the regulation method of the high-temperature refrigeration in relation to multi-gang air-conditioner is reducing the same of system high pressure Shi Wufa promotes the refrigeration effect of air-conditioning itself, and refrigerating efficiency is lower.
Summary of the invention
In view of this, it is an object of the invention to propose a kind of control method for multi-gang air-conditioner high-temperature refrigeration, To solve in the existing regulation method about multi-gang air-conditioner high-temperature refrigeration, sky can not be promoted while reducing high-pressure Adjust the refrigeration effect of itself, the lower problem of refrigerating efficiency.In order to some aspects of the embodiment to disclosure have one it is basic Understand, simple summary is shown below.The summarized section is not extensive overview, nor to determine key/critical composition member Element or the protection scope for describing these embodiments.Its sole purpose is that some concepts are presented with simple form, in this, as rear The preamble of the detailed description in face.
In some alternative embodiments, which includes: the operational mode and fortune of real-time detection multi-gang air-conditioner Row state;When detecting multi-gang air-conditioner refrigerating operaton, whether the operating status for detecting multi-gang air-conditioner meets systemic presupposition First condition;When the operating status of multi-gang air-conditioner meets the systemic presupposition first condition, outer machine out of service is adjusted The heat exchange state of module and system refrigerant, wherein the compressor of outer machine module out of service keeps halted state.
Further, systemic presupposition first condition includes: that the value of the outdoor environment temperature of multi-gang air-conditioner is greater than systemic presupposition Temperature threshold;And the value of the high-pressure of the outdoor machine system of the multi-gang air-conditioner is greater than the pressure threshold of systemic presupposition; And there is outer machine module out of service in the outdoor machine system of the multi-gang air-conditioner.
Further, the process for adjusting the heat exchange state of outer machine module and system refrigerant out of service includes: a, opens The electric expansion valve of an outer machine module in the outer machine module out of service, and the blower for starting the outer machine module carries out Operating makes its condenser and the system refrigerant carry out heat exchange;B, after the first duration of systemic presupposition, according to what is detected Variation adjustment and the system refrigerant of the high-pressure of the outdoor machine system carry out the described out of service outer of heat exchange The quantity of machine module;C, a length of period when with the systemic presupposition the first repeats step b until stopping transporting the stopping Until the heat exchange state of capable outer machine module and system refrigerant is adjusted.
Further, in stepb, according to the variation of the high-pressure of the outdoor machine system detected adjust with it is described The process that system refrigerant carries out the quantity of the outer machine module out of service of heat exchange includes: to work as to detect the outdoor unit When the value of the high-pressure of system is greater than the pressure threshold of the systemic presupposition, by electronics in the outer machine module out of service The electric expansion valve of an outer machine module in the outer machine module that expansion valve is not switched on is opened, and starts the blower of the outer machine module It is operated.
Further, in stepb, according to the variation of the high-pressure of the outdoor machine system detected adjust with it is described The process that system refrigerant carries out the quantity of the outer machine module out of service of heat exchange includes: to work as to detect the outdoor unit The value of the high-pressure of system is more than or equal to systemic presupposition first pressure value, less than or equal to the pressure threshold of the systemic presupposition When, the operating status that the multi-gang air-conditioner remains current is constant.
Further, in stepb, according to the variation of the high-pressure of the outdoor machine system detected adjust with it is described The process that system refrigerant carries out the quantity of the outer machine module out of service of heat exchange includes: to work as to detect the outdoor unit When the value of the high-pressure of system is less than systemic presupposition first pressure value, by electronic expansion in the outer machine module out of service The electric expansion valve for the outer machine module in outer machine module that valve is opened is closed, and stops the blower operating of the outer machine module.
Further, in step c, stop to the heat exchange state of the outer machine module out of service and system refrigerant into The process of row adjustment includes: to work as to detect that the operational mode of multi-gang air-conditioner and operating status meet systemic presupposition second condition When, stopping is adjusted the heat exchange state of the outer machine module and system refrigerant out of service.
Further, systemic presupposition second condition includes one of the following: the value of the high-pressure of outdoor machine system is pre- in system If in the second duration, continuously less than systemic presupposition first pressure value;The value of the high-pressure of the outdoor machine system is pre- in system If in third duration, continuously less than systemic presupposition second pressure value;Multi-gang air-conditioner heating operation;The multi-gang air-conditioner stops Machine.
Further, the temperature threshold of systemic presupposition is 34-37 DEG C;The pressure threshold of systemic presupposition is 3-3.5MPa;System Default first pressure value is 2.4-2.8MPa;Systemic presupposition second pressure value is 1.8-2.2MPa.
Further, 2-4 minutes a length of when systemic presupposition the first;It is 8-12 minutes a length of when systemic presupposition the second;Systemic presupposition It is 0.8-1.2 minutes a length of when third.
Compared with prior art, the invention has the benefit that
The present invention provides a kind of control method for multi-gang air-conditioner high-temperature refrigeration, and in the control method, use is multi-joint The condenser Yu system refrigerant of outer machine module out of service carry out heat exchange in the outdoor machine system of air conditioner, to increase The area that system refrigerant and outdoor machine system carry out heat exchange mentions while the high-pressure that outdoor machine system is effectively reduced The high refrigeration effect of multi-gang air-conditioner itself, applicability is more preferably.
For the above and related purposes, one or more embodiments include being particularly described below and in claim In the feature that particularly points out.Certain illustrative aspects are described in detail in the following description and the annexed drawings, and its instruction is only Some modes in the utilizable various modes of the principle of each embodiment.Other benefits and novel features will be under The detailed description in face is considered in conjunction with the accompanying and becomes obvious, the disclosed embodiments be all such aspects to be included and they Be equal.
Detailed description of the invention
Fig. 1 is the flow diagram of the control method for multi-gang air-conditioner high-temperature refrigeration of the embodiment of the present invention.
Specific embodiment
The following description and drawings sufficiently show specific embodiments of the present invention, to enable those skilled in the art to Practice them.Embodiment only represents possible variation.Unless explicitly requested, otherwise individual components and functionality is optional, and And the sequence of operation can change.The part of some embodiments and feature can be included in or replace other embodiments Part and feature.The range of embodiment of the present invention includes the entire scope of claims and the institute of claims There is obtainable equivalent.Herein, these embodiments of the invention individually or generally can be used term " invention " It indicates, this is not meant to automatically limit this just for the sake of convenient, and if in fact disclose the invention more than one The range of application is any single invention or inventive concept.
Before this clearly demarcated embodiment of specific introduction, one first is made to some technical terms of the invention and is explained.Herein, The outdoor machine system of multi-gang air-conditioner is made of multiple outer machine modules, wherein each outer machine module can be used as an independence Outer machine operating system, configure individual compressor, the equipment such as blower, condenser and electric expansion valve.Work as multi-gang air-conditioner All interior machines in, only in part machine starting operation in the case where, the part of the multi-gang air-conditioner outside machine module can be in stop The state only run, correspondingly, the compressor and blower of this part outer machine module out of service are in shape out of service State.
It is illustrated presently in connection with attached drawing, shown in fig. 1 is in some optional embodiments for multi-gang air-conditioner high temperature The flow chart of the control method of refrigeration.
As shown in Figure 1, in some alternative embodiments, disclosing a kind of control for multi-gang air-conditioner high-temperature refrigeration Method, the control method include:
The operational mode and operating status of S11, real-time detection multi-gang air-conditioner;
S12, when detecting multi-gang air-conditioner refrigerating operaton, whether the operating status for detecting multi-gang air-conditioner meets system Default first condition;
Wherein, systemic presupposition first condition includes: that the value of the outdoor environment temperature of multi-gang air-conditioner is greater than systemic presupposition Temperature threshold;And the value of the high-pressure of the outdoor machine system of the multi-gang air-conditioner is greater than the pressure threshold of systemic presupposition;And There is outer machine module out of service in the outdoor machine system of the multi-gang air-conditioner.In the specific implementation, user can basis It needs arbitrarily to set the pressure threshold of the temperature threshold of systemic presupposition and systemic presupposition, for example, can be by systemic presupposition Temperature threshold be set as 34-37 DEG C, it is preferred that the temperature threshold of the systemic presupposition is set as 35 DEG C;It can be pre- by system If pressure threshold be set as 3-3.5MPa, it is preferred that the pressure threshold of the systemic presupposition is set as 3.2MPa.
S13, when the operating status of multi-gang air-conditioner meets the systemic presupposition first condition, adjust out of service outer The heat exchange state of machine module and system refrigerant, wherein the compressor of outer machine module out of service keeps halted state.This mistake Cheng Zhong has adjusted in the multi-gang air-conditioner by adjusting the heat exchange state of outer machine module out of service and system refrigerant and is Refrigerant of uniting carries out the area of heat exchange with outdoor machine system, to realize the high-pressure and multi-connected machine to outdoor machine system simultaneously The adjusting of the refrigeration effect of air-conditioning itself.
Further, the process for adjusting the heat exchange state of outer machine module and system refrigerant out of service includes: a, opens The electric expansion valve of an outer machine module in the outer machine module out of service, and the blower for starting the outer machine module carries out Operating makes its condenser and the system refrigerant carry out heat exchange, it is preferred that in the process, the electronics of outer machine module is swollen Swollen valve is opened to maximum opening, and the revolving speed of its blower is adjusted to maximum (top) speed, in this manner it is ensured that multi-gang air-conditioner The adjusting of the refrigerating efficiency of the high-pressure and multi-gang air-conditioner itself of outdoor machine system reaches optimum efficiency;B, by system After default first duration, according to the variation of the high-pressure of the outdoor machine system detected adjustment and the system refrigerant into The quantity of the outer machine module out of service of row heat exchange;C, a length of period when with the systemic presupposition the first, repetition are held Row step b is until stopping being adjusted the heat exchange state of the outer machine module out of service and system refrigerant.
Further, in stepb, according to the variation of the high-pressure of the outdoor machine system detected adjust with it is described The process that system refrigerant carries out the quantity of the outer machine module out of service of heat exchange includes: to work as to detect the outdoor unit When the value of the high-pressure of system is greater than the pressure threshold of the systemic presupposition, by electronics in the outer machine module out of service The electric expansion valve of an outer machine module in the outer machine module that expansion valve is not switched on is opened, and starts the blower of the outer machine module Operated, it is preferred that the electric expansion valve of the outer machine module is opened to maximum opening, and by the revolving speed of its blower adjust to Maximum (top) speed, in this manner it is ensured that the system of the high-pressure and multi-gang air-conditioner itself to the outdoor machine system of multi-gang air-conditioner The adjusting of cold efficiency reaches optimum efficiency, in the process, when the value for the high-pressure for detecting the outdoor machine system is big When the pressure threshold of the systemic presupposition, if detecting, the electric expansion valve of all outer machine modules out of service has been beaten It opens, then maintains current operating status constant;Or, being when the value for the high-pressure for detecting the outdoor machine system is more than or equal to Unite default first pressure value, less than or equal to the systemic presupposition pressure threshold when, the multi-gang air-conditioner maintains current fortune Row state is constant;Or, when detecting that the value of high-pressure of the outdoor machine system is less than systemic presupposition first pressure value, it will The electric expansion valve for the outer machine module in outer machine module that electric expansion valve is opened in the outer machine module out of service It closes, and stops the blower operating of the outer machine module, in the process, when the high-pressure for detecting the outdoor machine system When value is less than systemic presupposition first pressure value, if detecting, the electric expansion valve of all outer machine modules out of service has been closed It closes, then maintains current operating status constant.
Wherein, user, which can according to need, arbitrarily sets the first duration of systemic presupposition and systemic presupposition first pressure value It is fixed, for example, the first duration of systemic presupposition can be set as to 2-4 minutes, it is preferred that first duration of systemic presupposition to be set as 3 minutes;Systemic presupposition first pressure value can be set as 2.4-2.8MPa, it is preferred that by the systemic presupposition first pressure value It is set as 2.5MPa.
Further, in step c, stop to the heat exchange state of the outer machine module out of service and system refrigerant into The process of row adjustment includes: to work as to detect that the operational mode of multi-gang air-conditioner and operating status meet systemic presupposition second condition When, stopping is adjusted the heat exchange state of the outer machine module and system refrigerant out of service.
Further, systemic presupposition second condition includes one of the following: the value of the high-pressure of the outdoor machine system is being It unites in default second duration, continuously less than systemic presupposition first pressure value;The value of the high-pressure of the outdoor machine system is being It unites in default third duration, continuously less than systemic presupposition second pressure value;The multi-gang air-conditioner heating operation;The multi-connected machine Air-conditioning is shut down.
Wherein, user can according to need arbitrarily pre- to the second duration of systemic presupposition, systemic presupposition third duration and system If second pressure value is set, for example, the second duration of systemic presupposition can be set as to 8-12 minutes, it is preferred that be by this Default second duration of uniting is set as 10 minutes;Systemic presupposition third duration can be set as to 0.8-1.2 minutes, it is preferred that will The systemic presupposition third duration is set as 1 minute;Systemic presupposition second pressure value can be set as 1.8-2.2MPa, preferably , which is set as 2MPa.
In control method of the invention, using the cold of outer machine module out of service in the outdoor machine system of multi-gang air-conditioner Condenser and system refrigerant carry out heat exchange, to increase the area of system refrigerant and outdoor machine system progress heat exchange, are having While effect reduces the high-pressure of outdoor machine system, the refrigeration effect of multi-gang air-conditioner itself is improved, applicability is more preferably.
In short, the above description is only an embodiment of the present invention, it is merely to illustrate the principle of the present invention, is not intended to limit this The protection scope of invention.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on, should all It is included within protection scope of the present invention.

Claims (8)

1. a kind of control method for multi-gang air-conditioner high-temperature refrigeration characterized by comprising
The operational mode and operating status of real-time detection multi-gang air-conditioner;
When detecting multi-gang air-conditioner refrigerating operaton, whether the operating status for detecting multi-gang air-conditioner meets systemic presupposition first Condition;
When the operating status of multi-gang air-conditioner meets the systemic presupposition first condition, adjust outer machine module out of service with The heat exchange state of system refrigerant, wherein the compressor of outer machine module out of service keeps halted state;
Wherein, the systemic presupposition first condition includes: that the value of the outdoor environment temperature of the multi-gang air-conditioner is pre- greater than system If temperature threshold;And the value of the high-pressure of the outdoor machine system of the multi-gang air-conditioner is greater than the pressure threshold of systemic presupposition Value;And there is outer machine module out of service in the outdoor machine system of the multi-gang air-conditioner;
The process of the adjustment outer machine module and the heat exchange state of system refrigerant out of service includes:
A, the electric expansion valve of an outer machine module in the outer machine module out of service is opened, and starts the outer machine module Blower operated, so that its condenser and the system refrigerant is carried out heat exchange;
B, after the first duration of systemic presupposition, according to the variation of the high-pressure of the outdoor machine system detected adjustment with The system refrigerant carries out the quantity of the outer machine module out of service of heat exchange;
C, a length of period when with the systemic presupposition the first repeats step b until stopping to the outer machine out of service Until module and the heat exchange state of system refrigerant are adjusted.
2. control method according to claim 1, which is characterized in that in stepb, the room that the basis detects The variation adjustment of the high-pressure of outer machine system carries out the outer machine module out of service of heat exchange with the system refrigerant Quantity process include: when detect the outdoor machine system high-pressure value be greater than the systemic presupposition pressure threshold When value, by the electricity of an outer machine module in electric expansion valve is not switched in the outer machine module out of service outer machine module Sub- expansion valve is opened, and the blower for starting the outer machine module is operated.
3. control method according to claim 1, which is characterized in that in stepb, the room that the basis detects The variation adjustment of the high-pressure of outer machine system carries out the outer machine module out of service of heat exchange with the system refrigerant Quantity process include: when detect the outdoor machine system high-pressure value be more than or equal to systemic presupposition first pressure Value, less than or equal to the systemic presupposition pressure threshold when, the operating status that the multi-gang air-conditioner remains current is constant.
4. control method according to claim 1, which is characterized in that in stepb, the room that the basis detects The variation adjustment of the high-pressure of outer machine system carries out the outer machine module out of service of heat exchange with the system refrigerant Quantity process include: when detect the outdoor machine system high-pressure value be less than systemic presupposition first pressure value When, the electronics for the outer machine module in outer machine module that electric expansion valve in the outer machine module out of service is opened is swollen Swollen valve is closed, and stops the blower operating of the outer machine module.
5. according to control method described in claim 2-4 any one, which is characterized in that in step c, the stopping is to institute Stating the process that the heat exchange state of outer machine module out of service and system refrigerant is adjusted includes: when detecting multi-connected machine sky When the operational mode and operating status of tune meet systemic presupposition second condition, stop to the outer machine module out of service be The heat exchange state of system refrigerant is adjusted.
6. control method according to claim 5, which is characterized in that the systemic presupposition second condition include it is following it One:
The value of the high-pressure of the outdoor machine system is in the second duration of systemic presupposition, continuously less than systemic presupposition first pressure Value;
The value of the high-pressure of the outdoor machine system is in systemic presupposition third duration, continuously less than systemic presupposition second pressure Value;
The multi-gang air-conditioner heating operation;
The multi-gang air-conditioner is shut down.
7. control method according to claim 6, which is characterized in that the temperature threshold of the systemic presupposition is 34-37 DEG C; The pressure threshold of the systemic presupposition is 3-3.5MPa;The systemic presupposition first pressure value is 2.4-2.8MPa;The system Default second pressure value is 1.8-2.2MPa.
8. control method according to claim 7, which is characterized in that 2-4 minutes a length of when the systemic presupposition the first;Institute It states 8-12 minutes a length of when systemic presupposition the second;It is 0.8-1.2 minutes a length of when the systemic presupposition third.
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