WO2019024683A1 - 一种膨胀阀的控制方法及装置 - Google Patents

一种膨胀阀的控制方法及装置 Download PDF

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Publication number
WO2019024683A1
WO2019024683A1 PCT/CN2018/096155 CN2018096155W WO2019024683A1 WO 2019024683 A1 WO2019024683 A1 WO 2019024683A1 CN 2018096155 W CN2018096155 W CN 2018096155W WO 2019024683 A1 WO2019024683 A1 WO 2019024683A1
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Prior art keywords
working state
internal
expansion valve
internal machines
specified number
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PCT/CN2018/096155
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English (en)
French (fr)
Inventor
王军
程绍江
禚百田
张锐钢
邵文俊
张万英
时斌
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青岛海尔空调电子有限公司
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Priority to EP18840409.9A priority Critical patent/EP3647680B1/en
Publication of WO2019024683A1 publication Critical patent/WO2019024683A1/zh
Priority to US16/780,420 priority patent/US20200191430A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • 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
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control 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
    • F24F11/84—Control 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
    • F25B2313/02334—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements during heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/12—Sound
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0253—Compressor control by controlling speed with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to the field of terminal technologies, and in particular, to a control method and device for an expansion valve.
  • the indoor unit can directly feel the unit experienced by the user, and the cooling and heating effect and the noise level directly affect the user experience.
  • the indoor unit heat exchanger acts as a condenser
  • the outdoor unit heat exchanger acts as an evaporator
  • the high temperature and high pressure gaseous refrigerant outputted by the compressor is condensed into a high pressure normal temperature liquid refrigerant in the indoor unit heat exchanger.
  • the electronic expansion valve After passing through the electronic expansion valve, it enters the outdoor unit, and after evaporation and depressurization, it evaporates into a low-temperature gaseous refrigerant at the outdoor heat exchanger, and then is compressed into a high-temperature and high-pressure gaseous refrigerant through a compressor to complete the circulation of the refrigeration system.
  • the high temperature gaseous refrigerant may not be sufficiently condensed at the indoor unit heat exchanger due to the ambient temperature and various other factors, and the gas and liquid two phases are at the outlet of the indoor unit heat exchanger.
  • the state flows through the electronic expansion valve of the indoor unit. Therefore, if the indoor unit is operated in the heating mode, the refrigerant passing through the electronic expansion valve of the indoor unit may be in a gas-liquid two-phase state or even a liquid state. When the indoor unit is stopped, the refrigerant may flow through the indoor unit electronic expansion valve. The noise, which will seriously affect the user experience.
  • the embodiment of the invention provides a control method and device for an expansion valve, which reduces the refrigerant noise to a certain extent.
  • an embodiment of the present invention provides a method for controlling an expansion valve, the method comprising:
  • the second specified number of expansion valves corresponding to the internal machine in the non-operating state are alternately turned on according to a predetermined period.
  • the method further includes: after the closing the expansion valve corresponding to the internal machine in the non-operating state, the method further includes:
  • adjusting the working frequency of the external machine press according to the number of internal machines in the non-working state includes:
  • X is the target operating frequency
  • X1 is the normal operating frequency of the external machine
  • N is the number of internal machines in the non-working state
  • A is the adjustment coefficient
  • the implementation further provides an implementation, wherein the opening, according to the predetermined period, the second specified number of the inflating valves corresponding to the internal machine in the non-working state comprises:
  • the expansion valve corresponding to the second specified number of internal machines in the non-operating state is turned on to a specified threshold in accordance with a predetermined cycle.
  • the method further includes:
  • an embodiment of the present invention further provides a control device for an expansion valve, the device comprising:
  • a closing unit configured to close all expansion valves corresponding to the internal machine in the non-working state when the first specified number of internal machines are in a non-working state
  • an opening unit configured to rotate, according to a predetermined period, a second specified number of expansion valves corresponding to the internal machine in an inoperative state.
  • the device further includes:
  • the adjusting unit is configured to adjust the working frequency of the external press according to the number of internal machines in the non-working state.
  • the working frequency of the machine press where X is the target operating frequency, X1 is the normal working frequency of the external machine, N is the number of internal machines in the non-working state, and A is the adjustment coefficient.
  • the opening unit is specifically configured to turn on the expansion valve corresponding to the second specified number of internal machines in a non-operating state according to a predetermined cycle to the designated Threshold.
  • the device further includes:
  • a determining unit configured to determine whether the number of internal machines currently in the working state exceeds a third specified number
  • the closing unit is configured to close all expansion valves corresponding to the internal machine in the non-working state when it is determined that the number of internal machines currently in the working state does not exceed the third specified number.
  • the embodiment of the invention provides a control method for an expansion valve, which ensures that the expansion valve of the internal machine is turned on in all the internal machines in the non-operating state, and the expansion valve of the remaining internal machine is closed at the same time, thereby ensuring that the expansion valve is in the non-working state. Only a small amount of noise can be generated in the machine. Compared with the prior art in which the internal machine in the non-operating state all opens the expansion valve, the method adopted in the embodiment of the present invention only allows some internal machines to generate noise. It can effectively reduce the interference caused by noise.
  • FIG. 1 is a flow chart of a control method of an expansion valve according to an embodiment of the present invention.
  • FIG. 2 is a flow chart of another control method of an expansion valve according to an embodiment of the present invention.
  • FIG. 3 is a flow chart of another control method of an expansion valve according to an embodiment of the present invention.
  • FIG. 4 is a flow chart of another control method of an expansion valve according to an embodiment of the present invention.
  • FIG. 5 is a block diagram showing the composition of a control device for an expansion valve according to an embodiment of the present invention.
  • FIG. 6 is a block diagram showing the composition of a control device for another expansion valve according to an embodiment of the present invention.
  • FIG. 7 is a block diagram showing the composition of a control device for another expansion valve according to an embodiment of the present invention.
  • the embodiment of the invention provides a control method for an expansion valve, which aims to solve the problem of mute when the internal machine in the multi-line system is in a non-working state.
  • the process of the method is as shown in FIG. 1 and includes:
  • the non-operational state in the embodiment of the present invention may include a shutdown or standby state.
  • the function of closing the expansion valve is to stop the flow of the refrigerant between the internal machine and the external machine. After the refrigerant stops flowing, the noise generated by the refrigerant colliding with the expansion valve is no longer generated.
  • the first specified number is used to indicate the number of internal machines in the non-working state in the multi-line system, which is generally determined by the actual situation.
  • the second specified number has a certain size relationship with the first specified number.
  • the second specified number is not greater than the first specified number, so as to ensure that the internal working state in the working state is not affected. Since the rotation is turned on, the second specified number of settings is not too much, because the excessive startup will re-create the refrigerant noise.
  • the second specified number can generally be set to 1 or a certain percentage of the total number of internal machines.
  • the predetermined period can be set according to actual needs or experience values, such as 1 minute, 5 minutes, 10 minutes, and the like.
  • the embodiment of the invention provides a control method for an expansion valve, which ensures that the expansion valve of the internal machine is turned on in all the internal machines in the non-operating state, and the expansion valve of the remaining internal machine is closed at the same time, thereby ensuring that the expansion valve is in the non-working state. Only a small amount of noise can be generated in the machine. Compared with the prior art in which the internal machine in the non-operating state all opens the expansion valve, the method adopted in the embodiment of the present invention only allows some internal machines to generate noise. It can effectively reduce the interference caused by noise.
  • step 102 performs step 102 after the expansion of the expansion valve corresponding to the internal machine in the non-working state.
  • step 103 is provided, as shown in FIG. 2, including:
  • the adjustment method of the working frequency of the external press is:
  • X is the target operating frequency
  • X1 is the normal working frequency of the external machine, and is generally configured at 20 Hz to 120 Hz.
  • N is the number of internal machines in the non-working state, which can be uniformly collected by the controller or manager of the multi-line system,
  • A For the adjustment coefficient, the adjustment coefficient can be set according to the refrigerant pressure when the internal machine is working in different numbers.
  • the specific size is not limited in the embodiment of the present invention, as long as the target operating frequency is adjusted to be between 20 Hz and 100 Hz.
  • the operating frequency of the external press can be reduced according to the number of internal machines in the non-operating state, thereby preventing excessive refrigerant from being conducted in the pipeline in which the external machine interacts with the internal machine in the normal working state.
  • the embodiment of the present invention further defines the opening degree of the expansion valve during the execution of the step 102.
  • the step 102 may be specifically performed as the following step D102, including:
  • the specified threshold value generally needs to be set to be smaller than the opening degree during normal operation, so as to reduce the noise reduction effect of the refrigerant throughput, for example, 60 pls.
  • the specified threshold can be set larger than the normal operation according to actual needs, so as to balance the pipeline pressure as soon as possible.
  • the embodiment of the present invention needs to determine the number of internal machines currently running to determine whether the noise control is suitable in the current environment.
  • the specific process is shown in Figure 4, including:
  • step 101 Determine whether the number of internal machines currently in the working state exceeds a third specified number. When it is determined that the number of internal machines currently in the working state does not exceed the third specified number, step 101 is performed. Otherwise, step 105 is performed.
  • the third specified number setting generally does not exceed 3% to 5% of the total number of machines in the multi-line system.
  • 3% to 5% is 1 to 2 units.
  • the volume of the internal machine during normal operation will significantly exceed the volume of the refrigerant noise, making the control of the refrigerant noise less obvious.
  • the embodiment of the present invention does not limit the condition that the number of third instructions that are currently in the working state is still exceeded.
  • the embodiment of the present invention provides a control device for an expansion valve, which can be used to implement the foregoing method flow. As shown in FIG. 5, the device includes:
  • the closing unit 21 is configured to close all expansion valves corresponding to the internal machine in the non-working state when the first specified number of internal machines are in the non-working state.
  • the opening unit 22 is configured to alternately open a second specified number of expansion valves corresponding to the internal machine in a non-operating state according to a predetermined cycle.
  • the apparatus further includes:
  • the adjusting unit 23 is configured to acquire the number of internal machines in the non-working state; and adjust the working frequency of the external machine according to the number of internal machines in the non-working state.
  • the opening unit 22 is specifically configured to turn on the expansion valve corresponding to the second specified number of internal machines in a non-operating state to a specified threshold according to a predetermined period.
  • the device further includes:
  • the determining unit 24 is configured to determine whether the number of internal machines currently in the working state exceeds a third specified number.
  • the closing unit 21 is configured to close all expansion valves corresponding to the internal machine in the non-working state when it is determined that the number of internal machines currently in the working state does not exceed the third specified number.
  • the embodiment of the invention provides a control device for an expansion valve, which ensures that the expansion valve of the internal machine is turned on in all the internal machines in the non-operating state, and the expansion valve of the remaining internal machine is closed at the same time, thereby ensuring that the expansion valve is in the non-working state. Only a small amount of noise can be generated in the machine. Compared with the prior art in which the internal machine in the non-operating state all opens the expansion valve, the method adopted in the embodiment of the present invention only allows some internal machines to generate noise. It can effectively reduce the interference caused by noise.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined. Or it can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the above software functional unit is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the methods of the various embodiments of the present invention. Part of the steps.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

Abstract

一种膨胀阀的控制方法及装置，该方法包括当第一指定数量的内机处于非工作状态时，关闭所有处于非工作状态的内机对应的膨胀阀；按照预定周期轮流开启第二指定数量处于非工作状态的内机对应的膨胀阀。本方法及装置适用于空调噪音控制的过程中。

Description

一种膨胀阀的控制方法及装置
本申请基于申请号为CN201710650431.6、申请日为2017.08.02的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本发明涉及终端技术领域，尤其涉及一种膨胀阀的控制方法及装置。
背景技术
在多联机系统中，室内机作为用户可直接感受体验到的单元，其制冷制热效果好坏以及噪音大小直接影响用户体验。当室内机以制热模式运行时，室内机换热器作为冷凝器，室外机换热器作为蒸发器，压缩机输出的高温高压气态冷媒在室内机换热器中冷凝为高压常温液态冷媒，再经过电子膨胀阀进入室外机，并在节流降压后在室外机换热器处蒸发成低温气态冷媒，然后经过压缩机压缩成高温高压气态冷媒，完成制冷系统的循环。
当室内机以制热模式运行时，受环境温度以及其他各种不同条件因素的影响，高温气态冷媒在室内机换热器处可能没有充分冷凝，在室内机换热器出口以气液两相态流经室内机的电子膨胀阀。因此，如果室内机以制热模式运行，由于经过室内机电子膨胀阀的冷媒可能为气液两相态甚至液态，当室内机停机时，冷媒流经室内机电子膨胀阀时可能会产生较大的噪音，这样会严重影响用户体验。
发明内容
有鉴于此，本发明实施例提供了一种膨胀阀的控制方法及装置，在一定程度上降低冷媒噪声。
一方面，本发明实施例提供了一种膨胀阀的控制方法，所述方法包括：
当第一指定数量的内机处于非工作状态时，关闭所有处于非工作状态的内机对应的膨胀阀；
按照预定周期轮流开启第二指定数量处于非工作状态的内机对应的膨胀阀。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，在所述关闭所有处于非工作状态的内机对应的膨胀阀之后，所述方法还包括：
根据处于非工作状态的内机数量，调整外机压机的工作频率。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，所述根据处于非工作状态的内机数量，调整外机压机的工作频率包括：
获取处于非工作状态的内机数量；
根据公式X＝X1–N*A，调整外机压机的工作频率；
其中，X为目标工作频率，X1为外机正常工作频率，N为处于非工作状态的内机数量，A为调整系数。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，所述按照预定周期轮流开启第二指定数量处于非工作状态的内机对应的膨胀阀包括：
按照预定周期轮流将第二指定数量处于非工作状态的内机对应的膨胀阀开启至指定阈值。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，在所述关闭所有处于非工作状态的内机对应的膨胀阀之前，还包括：
判断当前处于工作状态的内机数量是否超过第三指定数量；
当确定当前处于工作状态的内机数量未超过第三指定数量时，则关闭所有处于非工作状态的内机对应的膨胀阀。
另一方面，本发明实施例还提供了一种膨胀阀的控制装置，所述装置包括：
关闭单元，用于当第一指定数量的内机处于非工作状态时，关闭所有处于非工作状态的内机对应的膨胀阀；
开启单元，用于按照预定周期轮流开启第二指定数量处于非工作状态的内机对应的膨胀阀。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，所述装置还包括：
调整单元，用于根据处于非工作状态的内机数量，调整外机压机的工作频率。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，所述调整单元，具体用于获取处于非工作状态的内机数量；根据公式X＝X1–N*A，调整外机压机的工作频率；其中，X为目标工作频率，X1为外机正常工作频率，N为处于非工作 状态的内机数量，A为调整系数。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，所述开启单元具体用于按照预定周期轮流将第二指定数量处于非工作状态的内机对应的膨胀阀开启至指定阈值。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，所述装置还包括：
判断单元，用于判断当前处于工作状态的内机数量是否超过第三指定数量；
所述关闭单元，用于当确定当前处于工作状态的内机数量未超过第三指定数量时，则关闭所有处于非工作状态的内机对应的膨胀阀。
本发明实施例提供了膨胀阀的控制方法，通过在所有处于非工作状态的内机中轮流开启部分内机的膨胀阀，同时关闭剩余内机的膨胀阀，从而保证在处于非工作状态的内机中只允许少量可以产生噪音，相比于现有技术中处于非工作状态下的内机全部会开启膨胀阀的方案来说，本发明实施例所采用的方法只允许部分内机产生噪音，可以有效降低因噪音造成的干扰。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其它的附图。
图1是本发明实施例提供的一种膨胀阀的控制方法流程图；
图2是本发明实施例提供的另一种膨胀阀的控制方法流程图；
图3是本发明实施例提供的另一种膨胀阀的控制方法流程图；
图4是本发明实施例提供的另一种膨胀阀的控制方法流程图；
图5是本发明实施例提供的一种膨胀阀的控制装置的组成框图；
图6是本发明实施例提供的另一种膨胀阀的控制装置的组成框图；
图7是本发明实施例提供的另一种膨胀阀的控制装置的组成框图。
具体实施方式
为了更好的理解本发明的技术方案，下面结合附图对本发明实施例进行详细描述。
应当明确，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
在本发明实施例中使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本发明。在本发明实施例和所附权利要求书中所使用的单数形式的“一种”、“所述”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。
应当理解，本文中使用的术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
本发明实施例提供了一种膨胀阀的控制方法，旨在解决多联机系统内内机处于非工作状态时的静音问题，该方法流程如图1所示，包括：
101、当第一指定数量的内机处于非工作状态时，关闭所有处于非工作状态的内机对应的膨胀阀。
在本发明实施例中非工作状态可以包括关机或待机状态。
关闭膨胀阀的作用在于停止内机与外机之间的冷媒流动，冷媒停止流动后就不会再产生因冷媒碰撞膨胀阀而产生的噪音。
第一指定数量用于表示多联机系统中处于非工作状态的内机数量，一般由实际情况决定。
102、按照预定周期轮流开启第二指定数量处于非工作状态的内机对应的膨胀阀。
第二指定数量与第一指定数量存在一定的大小关系，在本发明实施例中要求第二指定数量不大于第一指定数量，以保证不会影响到处于工作状态的内机正常工作。由于是轮流开启，因此第二指定数量的设置不易过多，其原因在于启动过多会重新造成冷媒噪声。
第二指定数量一般可以设定为1个或不超过内机总数量的一定比例。
需要说明的是，虽然关闭膨胀阀后噪音消失，但是由于部分内机与外机之间的冷媒传导因膨胀阀的关闭而停止，这样会造成冷媒无法流经处于为工作状态的内机中，因而在一定程度上增大了外机与处于正常工作状态的内机进行冷媒交互的管道内压，有可能会降低安全性，因此需要按照预定周期轮流开启处于非工作状态的一定数量内 机对应的膨胀阀，以缓解管道压力。
预定周期可根据实际需要或经验值进行设定，例如1分钟、5分钟、10分钟等。
本发明实施例提供了膨胀阀的控制方法，通过在所有处于非工作状态的内机中轮流开启部分内机的膨胀阀，同时关闭剩余内机的膨胀阀，从而保证在处于非工作状态的内机中只允许少量可以产生噪音，相比于现有技术中处于非工作状态下的内机全部会开启膨胀阀的方案来说，本发明实施例所采用的方法只允许部分内机产生噪音，可以有效降低因噪音造成的干扰。
为了能够进一步减小外机与处于正常工作状态的内机进行冷媒交互的管道内压，本发明实施例在执行步骤102在所述关闭所有处于非工作状态的内机对应的膨胀阀之后，还提供了以下步骤103，如图2所示，包括：
103、根据处于非工作状态的内机数量，调整外机压机的工作频率。
外机压机工作频率的调整方法为：
获取处于非工作状态的内机数量，根据公式X＝X1–N*A，调整外机压机的工作频率。其中，X为目标工作频率，X1为外机正常工作频率，一般会配置在20Hz到120Hz，N为处于非工作状态的内机数量，可以通过多联机系统的控制器或管理器统一采集，A为调整系数，调整系数可以根据不同数量内机工作时的冷媒压力对应设置，具体大小本发明实施例不做限制，只要使目标工作频率被调整至20Hz到100Hz之间即可。
通过该调整方法，使得外机压机的工作频率可以根据处于非工作状态的内机数量而降低，从而避免过量的冷媒在外机与处于正常工作状态的内机进行冷媒交互的管道中传导。
为了进一步减少噪音，本发明实施例还对步骤102的执行过程中，膨胀阀的开度限定，如图3所示，步骤102可具体执行为以下步骤D102，包括：
D102、按照预定周期轮流将第二指定数量处于非工作状态的内机对应的膨胀阀开启至指定阈值。
指定阈值一般需要设定为比正常工作时的开度要小，以达到降低冷媒通过量减少噪音的效果，例如60pls。当然也可以根据实际需要将指定阈值设置得比正常工作时还要大，以尽快平衡管道压力。
本发明实施例在执行前述步骤101之前，还需要对当前正在运行的内机数量进行判别，以确定当前环境下是否适合进行噪音控制。具体流程如图4所示，包括：
104、判断当前处于工作状态的内机数量是否超过第三指定数量。当确定当前处于 工作状态的内机数量未超过第三指定数量时，执行步骤101。否则执行步骤105。
第三指定数量设定一般不超过多联机系统内总机数的3％到5％。例如1拖32的多联机系统中，3％到5％就是1到2台。超过一定比例后，内机正常工作时的音量就会明显超过冷媒噪声的音量，而使得对冷媒噪声的控制变得不是很明显。当然本发明实施例也不限制再超过当前处于工作状态的内机数量第三指令数量的条件仍然执行前述流程。
105、维持各内机当前运行状态。
本发明实施例提供了一种膨胀阀的控制装置，可用于实现前述各方法流程，如图5所示，所述装置包括：
关闭单元21，用于当第一指定数量的内机处于非工作状态时，关闭所有处于非工作状态的内机对应的膨胀阀。
开启单元22，用于按照预定周期轮流开启第二指定数量处于非工作状态的内机对应的膨胀阀。
可选的是，如图6所示，所述装置还包括：
调整单元23，用于获取处于非工作状态的内机数量；根据处于非工作状态的内机数量，调整外机压机的工作频率。
可选的是，所述调整单元23，具体用于根据公式X＝X1–N*A，调整外机压机的工作频率；其中，X为目标工作频率，X1为外机正常工作频率，N为处于非工作状态的内机数量，A为调整系数。
可选的是，所述开启单元22具体用于按照预定周期轮流将第二指定数量处于非工作状态的内机对应的膨胀阀开启至指定阈值。
可选的是，如图7所示，所述装置还包括：
判断单元24，用于判断当前处于工作状态的内机数量是否超过第三指定数量。
所述关闭单元21，用于当确定当前处于工作状态的内机数量未超过第三指定数量时，则关闭所有处于非工作状态的内机对应的膨胀阀。
本发明实施例提供了膨胀阀的控制装置，通过在所有处于非工作状态的内机中轮流开启部分内机的膨胀阀，同时关闭剩余内机的膨胀阀，从而保证在处于非工作状态的内机中只允许少量可以产生噪音，相比于现有技术中处于非工作状态下的内机全部会开启膨胀阀的方案来说，本发明实施例所采用的方法只允许部分内机产生噪音，可以有效降低因噪音造成的干扰。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本发明所提供的几个实施例中，应该理解到，所揭露的系统，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如，多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元存储在一个存储介质中，包括若干指令用以使得一台计算机装置(可以是个人计算机，服务器，或者网络装置等)或处理器(Processor)执行本发明各个实施例所述方法的部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明保护的范围之内。

Claims (10)

  1. 一种膨胀阀的控制方法，其特征在于，所述方法包括：
    当第一指定数量的内机处于非工作状态时，关闭所有处于非工作状态的内机对应的膨胀阀；
    按照预定周期轮流开启第二指定数量处于非工作状态的内机对应的膨胀阀。
  2. 根据权利要求1所述的方法，其特征在于，在所述关闭所有处于非工作状态的内机对应的膨胀阀之后，所述方法还包括：
    根据处于非工作状态的内机数量，调整外机压机的工作频率。
  3. 根据权利要求2所述的方法，其特征在于，所述根据处于非工作状态的内机数量，调整外机压机的工作频率包括：
    获取处于非工作状态的内机数量；
    根据公式X＝X1–N*A，调整外机压机的工作频率；
    其中，X为目标工作频率，X1为外机正常工作频率，N为处于非工作状态的内机数量，A为调整系数。
  4. 根据权利要求3所述的方法，其特征在于，所述按照预定周期轮流开启第二指定数量处于非工作状态的内机对应的膨胀阀包括：
    按照预定周期轮流将第二指定数量处于非工作状态的内机对应的膨胀阀开启至指定阈值。
  5. 根据权利要求4所述的方法，其特征在于，在所述关闭所有处于非工作状态的内机对应的膨胀阀之前，还包括：
    判断当前处于工作状态的内机数量是否超过第三指定数量；
    当确定当前处于工作状态的内机数量未超过第三指定数量时，则关闭所有处于非工作状态的内机对应的膨胀阀。
  6. 一种膨胀阀的控制装置，其特征在于，所述装置包括：
    关闭单元，用于当第一指定数量的内机处于非工作状态时，关闭所有处于非工作状态的内机对应的膨胀阀；
    开启单元，用于按照预定周期轮流开启第二指定数量处于非工作状态的内机对应的膨胀阀。
  7. 根据权利要求6所述的装置，其特征在于，所述装置还包括：
    调整单元，用于根据处于非工作状态的内机数量，调整外机压机的工作频率。
  8. 根据权利要求7所述的装置，其特征在于，所述调整单元，具体用于获取处于非工作状态的内机数量；根据公式X＝X1–N*A，调整外机压机的工作频率；其中，X为目标工作频率，X1为外机正常工作频率，N为处于非工作状态的内机数量，A为调整系数。
  9. 根据权利要求8所述的装置，其特征在于，所述开启单元具体用于按照预定周期轮流将第二指定数量处于非工作状态的内机对应的膨胀阀开启至指定阈值。
  10. 根据权利要求9所述的装置，其特征在于，所述装置还包括：
    判断单元，用于判断当前处于工作状态的内机数量是否超过第三指定数量；
    所述关闭单元，用于当确定当前处于工作状态的内机数量未超过第三指定数量时，则关闭所有处于非工作状态的内机对应的膨胀阀。
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