WO2024007685A1 - 变频器冷却装置、冷却方法及空调设备 - Google Patents

变频器冷却装置、冷却方法及空调设备 Download PDF

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Publication number
WO2024007685A1
WO2024007685A1 PCT/CN2023/089832 CN2023089832W WO2024007685A1 WO 2024007685 A1 WO2024007685 A1 WO 2024007685A1 CN 2023089832 W CN2023089832 W CN 2023089832W WO 2024007685 A1 WO2024007685 A1 WO 2024007685A1
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WO
WIPO (PCT)
Prior art keywords
electric valve
frequency converter
branch
bypass
frequency
Prior art date
Application number
PCT/CN2023/089832
Other languages
English (en)
French (fr)
Inventor
李龙
程琦
彭博宇
钟海玲
周进
Original Assignee
珠海格力电器股份有限公司
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Filing date
Publication date
Priority claimed from CN202210806051.8A external-priority patent/CN114980704B/zh
Application filed by 珠海格力电器股份有限公司 filed Critical 珠海格力电器股份有限公司
Publication of WO2024007685A1 publication Critical patent/WO2024007685A1/zh

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
    • H05K7/20354—Refrigerating circuit comprising a compressor
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • 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 disclosure relates to the technical field of air conditioning, and in particular to an inverter cooling device, a cooling method, and air conditioning equipment using the inverter cooling device.
  • the frequency converter operates under harsh working conditions for a long time, which will cause its temperature to rise abnormally. To ensure the normal operation of the frequency converter, it needs to be cooled.
  • the conventional method of cooling the frequency converter is to add a heat dissipation device, for example, using a fan to cool the frequency converter.
  • Another cooling method is to introduce part of the refrigerant in the refrigeration cycle system to cool the frequency converter.
  • the related art discloses a frequency converter cooling system that can evenly cool down the frequency converter. This cooling system leads two refrigerant flow paths from the condenser outlet to cool the inverter box and the inverter module respectively to solve the problem of cooling the inverter of the refrigeration unit under normal operating conditions.
  • a frequency converter cooling device which includes: an inlet pipeline, one end of which is connected to the condenser outlet pipeline; an outlet pipeline, on which a first electric valve is provided, and one end of which is connected to the evaporator inlet pipeline; a first branch and a second A branch is connected in parallel between the inlet pipe and the outlet pipe.
  • the first branch is used to cool the frequency converter cabinet, and the second branch is used to cool the frequency converter module; the frequency converter cooling
  • the device also includes: a bypass, one end of which is connected to the compressor outlet pipe, and the other end is connected to the outlet pipe of the first electric valve on the outlet pipe, and the bypass is provided with a second electric valve and an ejector; and a third branch, one end of which is connected to the ejector, and the other end is connected to the inlet pipe of the first electric valve, and a third electric valve is provided on the third branch.
  • a fourth electric valve and a capillary tube are provided on the first branch.
  • a fifth electric valve is provided on the second branch, and both ends of the fifth electric valve are connected in parallel.
  • One branch is equipped with an electronic expansion valve.
  • the present disclosure also proposes an air conditioning equipment, which includes the above-mentioned inverter cooling device.
  • the present disclosure also proposes an inverter cooling method for the above-mentioned air conditioning equipment.
  • This method controls the outlet pipeline to be connected to the bypass according to the ambient temperature, the temperature inside the inverter cabinet, the inverter module temperature and/or the compressor operating frequency.
  • the cooling effect of the frequency converter is ensured through the forced drainage of the ejector.
  • the frequency converter cooling method includes: in the power-on state of the unit, controlling the opening and closing of the bypass according to the first preset strategy according to the ambient temperature and the set ambient temperature high temperature value; in the normal operating state of the unit, According to the temperature inside the frequency converter cabinet, the temperature of the frequency converter module and the maximum value of the two set temperatures, the opening and closing of the bypass is controlled according to the second preset strategy; and when the unit is in low-frequency operation, according to the operating frequency and setting of the compressor Determine the minimum operating frequency and set frequency low frequency value, and control the opening and closing of the bypass according to the third preset strategy.
  • the first preset strategy control includes: when the ambient temperature is less than the set ambient temperature high temperature value, the bypass is closed, and the refrigerant in the first branch and the second branch merges at the outlet and passes through the third branch.
  • An electric valve is directly connected to the evaporator; and when the ambient temperature is greater than or equal to the set ambient temperature high temperature value, the bypass is opened, and the refrigerant in the first branch and the second branch merges at the outlet and passes through the third electric valve and the pilot valve.
  • the ejector meets the refrigerant in the bypass and is connected to the outlet pipe.
  • the first preset strategy control includes the following steps: detect the ambient temperature T when the unit is turned on, and determine whether the ambient temperature T is less than the set ambient temperature high temperature value T K1 ; if so, t 1 before the compressor is turned on Open the fourth electric valve, the fifth electric valve, the first electric valve and the electronic expansion valve within 1 minute, and the unit enters normal operation; and if not, open the fourth electric valve and the third electric valve within t1 minute before the compressor starts. , the second electric valve and the electronic expansion valve, and stabilize the refrigerant flow of the cooling inverter through the bypass and the ejector. After the compressor is turned on for t 2 minutes, open the fifth electric valve and the first electric valve, and close the third electric valve. and the second electric valve, the unit enters normal operation.
  • the second preset strategy control includes: when the temperature in the frequency converter cabinet is lower than the maximum set temperature value in the cabinet, and the temperature of the frequency converter module is lower than the maximum set temperature value of the frequency converter module, the bypass is closed. , the refrigerant in the first branch and the second branch is directly connected to the evaporator through the outlet pipe after the outlet merges; and when the temperature in the inverter cabinet is greater than or equal to the maximum temperature in the set cabinet, and the inverter module temperature is greater than or equal to When the maximum temperature of the inverter module is set, the bypass is opened. The refrigerant in the first branch and the second branch merges at the outlet and passes through the third electric valve and ejector to meet the refrigerant in the bypass and then passes through the outlet pipe. Connected to the evaporator.
  • the second preset strategy control includes the following steps: t2 minutes after the compressor is turned on, detect the temperature TG in the frequency converter cabinet and the temperature TM of the frequency converter module in real time; determine the temperature TG in the frequency converter cabinet Is it small Set the maximum value of the temperature in the cabinet T K2 , and whether the inverter module temperature TM is less than the set maximum temperature of the inverter module T K3 ; if so, open the fifth electric valve and the first electric valve, close the third electric valve and The second electric valve, the bypass is closed; and if not, the fifth electric valve and the first electric valve are closed, the third electric valve and the second electric valve are opened, and the bypass is opened.
  • the third preset strategy control includes the following steps: after the compressor is turned on for t 2 minutes, check the compressor operating frequency, and determine whether the compressor operating frequency is greater than or equal to the minimum compressor setting within t 3 minutes. The operating frequency is less than or equal to the set compressor frequency low frequency value; if yes, open the third electric valve and the second electric valve, open the bypass, close the fifth electric valve and the first electric valve; and if not, open the fifth electric valve valve and the first electric valve, the bypass is closed.
  • the second preset strategy control when the second preset strategy control conflicts with the third preset strategy control, the second preset strategy control is preferred to control the opening and closing of the bypass.
  • the present disclosure also proposes a non-transitory computer-readable storage medium on which a computer program is stored.
  • the computer program is read by a processor, the above-mentioned inverter cooling method is executed.
  • a frequency converter cooling device including: a memory; and a processor coupled to the memory, the processor being configured to execute the above-mentioned steps based on instructions stored in the memory. Inverter cooling method.
  • a computer program including instructions that, when executed by a processor, cause the processor to perform the above-mentioned inverter cooling method.
  • Figure 1 is a system diagram of the present disclosure
  • Figure 2 is a flow chart of the first preset strategy control in the inverter cooling control method of the present disclosure
  • Figure 3 is a flow chart of the second preset strategy control in the inverter cooling control method of the present disclosure
  • Figure 4 is a flow chart of the third preset strategy control in the inverter cooling control method of the present disclosure.
  • FIG. 5 is a schematic structural diagram of some embodiments of the inverter cooling control device of the present disclosure.
  • T - ambient temperature T K1 - set the high temperature value of the ambient temperature
  • T G the temperature inside the inverter cabinet
  • T M the temperature of the inverter module
  • T K2 set the high temperature value of the inverter cabinet temperature
  • T K3 set High temperature value of inverter module temperature
  • any specific values are to be construed as illustrative only and not as limiting. Accordingly, other examples of the exemplary embodiments may have different values.
  • the variable frequency refrigeration cycle system includes: a compressor 1, an oil separator 2, a condenser 3, a throttling device 4 and an evaporator 5 that are connected in sequence by pipelines.
  • a compressor 1 After the high-temperature and high-pressure refrigerant discharged from the compressor filters out the lubricating oil in the oil separator 2, it is cooled into a medium-temperature and high-pressure liquid in the condenser 3, and then passes through the throttling device 4 and becomes a low-temperature and low-pressure liquid, and then in the evaporator 5
  • the medium gas is converted into low-temperature and low-pressure gas, which is then circulated through the compressor 1.
  • the compressor In order to meet different load requirements, the compressor usually uses a variable frequency compressor. To ensure the normal operation of the frequency converter, it needs to be cooled.
  • the frequency converter cooling device proposed in this disclosure includes: an inlet pipeline 15, one end of which is connected to the outlet pipeline of the condenser 3, and the other end is connected to the parallel first branch 16 and the second branch 17.
  • the first branch 16 passes through
  • the frequency converter cabinet is connected to the outlet pipe 18.
  • the second branch 17 passes through the frequency converter module and is connected to the outlet pipe 18.
  • the other end of the outlet pipe 18 is connected to the inlet pipe of the evaporator 5.
  • the first branch 16 is used to cool the frequency converter cabinet, and a fourth electric valve 6 is provided on it, which is used to control whether the refrigerant flows through the first branch by opening or closing, thereby controlling whether the cabinet of the frequency converter needs to be cooled. body to cool down.
  • a capillary tube 8 is also provided on the first branch to control the pressure difference between the inlet end and the outlet end of the first branch, limit the speed of the refrigerant flowing through the first branch, and enhance the heat exchange effect.
  • the part of the first branch in the frequency converter cabinet is close to the inner wall of the cabinet and is arranged in the form of a serpentine tube.
  • the second branch 17 is used to cool the inverter module, and a fifth electric valve 7 is provided on it. Its function is also to control whether the refrigerant flows through the second branch by opening or closing, thereby controlling whether the inverter module needs to be cooled. Cool down.
  • both ends of the fifth electric valve 7 are also connected in parallel with a branch 21, and an electronic expansion valve 9 is provided on this branch.
  • the refrigerant flow rate in the second branch is adjusted by adjusting the opening of the electronic expansion valve.
  • the part of the second branch in the cabinet is disposed close to the frequency converter module.
  • the refrigerant flow rate is reduced to make the temperature of the refrigerant flowing through the frequency converter module lower, thereby improving the heat exchange effect between the second branch and the frequency converter module, thereby accelerating the cooling of the frequency converter module.
  • the purpose of speed is to change
  • the temperature of the inverter module is less than or equal to a certain value, the refrigerant flow rate is reduced, and the amount of refrigerant flowing through the second branch is also reduced. At this time, the heat exchange effect will be reduced, thereby reducing the cooling speed of the inverter module.
  • the present disclosure adds a bypass 20 and a third branch 19 to the above-mentioned inverter cooling device.
  • One end of the bypass is connected to the outlet pipe of the compressor 1, and the other end is connected to the first electric motor on the outlet pipe 18.
  • the outlet pipe of valve 11 is connected.
  • the bypass 20 is provided with a second electric valve 14 and an ejector 13 in sequence.
  • a third electric valve 12 is provided on the third branch 19 , one end of the third branch is connected to the ejector 13 , and the other end is connected to the inlet pipe of the first electric valve 11 .
  • the ejector 13 serves as a power source component. The ejector fluid introduced in the bypass does work on the ejector fluid coming from the third branch 19 to increase its energy.
  • the ejector has a suction effect on the refrigerant in the first branch and the second branch, and uses this suction effect to increase and stabilize the flow of the refrigerant in the first and second branches, thereby ensuring that the refrigerant Cooling effect on the frequency converter cabinet and frequency converter modules.
  • the outlet pipeline is controlled to be connected to the bypass according to at least one of the ambient temperature, the temperature inside the frequency converter cabinet, the temperature of the frequency converter module, and the operating frequency of the compressor; and under high temperature and low frequency conditions, through The bypass and ejector guide the refrigerant to ensure the cooling effect of the frequency converter.
  • the inverter cooling method proposed in this disclosure includes: when the unit is powered on, according to the ambient temperature and the set ambient temperature high temperature value, the opening and closing of the bypass is controlled according to the first preset strategy; when the unit is in normal operation, according to the inverter cabinet The internal temperature, the inverter module temperature and the maximum set temperature of these two temperatures are used to control the opening and closing of the bypass according to the second preset strategy; and when the unit is in a low-frequency operating state, according to the operating frequency of the compressor, the compressor Set the minimum operating frequency and the low-frequency value of the compressor frequency, and control the opening and closing of the bypass according to the third preset strategy.
  • the first preset strategy control is applied to the power-on state of the unit, including: when the ambient temperature is lower than the set ambient temperature high temperature value, the bypass 20 is closed, and the refrigerants in the first branch 16 and the second branch 17 merge at the outlet. Then it is connected to the evaporator 5 through the outlet pipe 18; and when the ambient temperature is greater than or equal to the set ambient temperature high temperature value, the bypass 20 is opened, and the refrigerant in the first branch 16 and the second branch 17 merges at the outlet and passes through the third branch.
  • the three electric valves 12 and the ejector 13 meet the refrigerant in the bypass and then communicate with the evaporator 5 through the outlet pipe 18 .
  • the first preset strategy control includes the following steps.
  • the unit When the unit is powered on, it detects the ambient temperature T and determines whether the ambient temperature T is lower than the set ambient temperature high temperature value T K1 .
  • the frequency converter is cooled according to conventional control.
  • the fourth electric valve 6, the fifth electric valve 7, the first electric valve 11 and the electronic expansion valve 9 are opened.
  • 1 Main refrigerant flow path of the unit 1 ⁇ 2 ⁇ 3 ⁇ 4 ⁇ 5 ⁇ 1;
  • the ambient temperature T is greater than or equal to the set ambient temperature high temperature value T K1 , the ambient temperature is too high at this time, and there is a risk of overtemperature in the frequency converter cabinet and module temperature.
  • bypass 20 is turned on, and the bypass and ignition are used.
  • the forced drainage of radiator 13 ensures the cooling of the frequency converter.
  • the fourth electric valve 6, the third electric valve 12, the second electric valve 14 and the electronic expansion valve 9 are opened. at this time,
  • Cooling refrigerant flow path in the inverter cabinet 1 ⁇ 2 ⁇ 3 ⁇ 6 ⁇ 8 ⁇ 10 ⁇ 12 ⁇ 13 ⁇ 5 ⁇ 1;
  • the compressor After the compressor is turned on for t 2 minutes, the refrigerant flows stably. First open the fifth electric valve 7 and the first electric valve 11, and then close the third electric valve 12 and the second electric valve 14. At this time, the refrigerant flow path is controlled according to the conventional control. The frequency converter is cooled.
  • the second preset strategy control is used for the normal operating status of the unit, including: when the temperature in the inverter cabinet is lower than the maximum set temperature in the cabinet, and the temperature of the inverter module is lower than the maximum set temperature of the inverter module, the bypass Closed, the refrigerants in the first branch and the second branch are directly connected to the outlet pipe after the outlet merges; and when the temperature in the inverter cabinet is greater than or equal to the maximum temperature in the set cabinet, and the inverter module temperature is greater than or equal to the set When the temperature of the inverter module reaches the highest value, the bypass is opened. The refrigerant in the first branch and the second branch merges at the outlet and passes through the ejector. It joins the refrigerant in the bypass and is connected to the outlet pipe.
  • the fifth electric valve 7 and the first electric valve 11 are opened, and the third electric valve 12 and the second electric valve 14 are closed.
  • the refrigerant flow path is the same as the refrigerant flow path in the normal state without bypass 20 being opened. ; Then re-enter the detection and judgment of the temperature T G in the inverter cabinet and the temperature T M of the inverter module.
  • the third preset strategy control is used for the low-frequency operating state of the compressor, including: when the operating frequency of the compressor is greater than or equal to the minimum operating frequency set by the compressor, and less than or equal to the low-frequency value of the set compressor frequency, opening the bypass; and When the compressor operating frequency is less than the set minimum operating frequency of the compressor and greater than the low frequency value of the set compressor frequency, the bypass is closed.
  • the third preset strategy control includes the following steps.
  • the compressor operating frequency f is detected and judged whether f l ⁇ f ⁇ f d is satisfied for t 3 consecutive minutes.
  • the third electric valve 12 and the second electric valve 14 are opened, the bypass is opened, the fifth electric valve 7 and the first electric valve 11 are closed.
  • the refrigerant at the outlet of the inverter and the refrigerant in the bypass After passing through the ejector 13, it flows to the evaporator 5; then it re-enters the detection and judgment of the compressor operating frequency f, that is, it is judged whether f l ⁇ f ⁇ f d is satisfied within t 3 consecutive minutes.
  • each electric valve is maintained in its original state, and the operating frequency of the compressor is continuously detected and judged.
  • the fifth electric valve 7 and the first electric valve 11 are closed, and the third electric valve 12 and the second electric valve 11 are closed.
  • the electric valve 14 opens, and the refrigerant from the inverter outlet and the refrigerant introduced by the bypass flow to the evaporator through the ejector.
  • the priority of the second preset strategy control and the third preset strategy control is carried out according to the following steps: when any state of the second preset strategy control and the third preset strategy control enters the bypass forced cooling control, that is, the first When the third electric valve 12 and the second electric valve 14 are opened, and the fifth electric valve 7 and the first electric valve 11 are closed, the control of another state is no longer entered until the normal state is restored.
  • the opening and closing of the bypass is controlled by the second preset strategy with priority.
  • This disclosure ensures that the refrigerant in the cooling flow path of the frequency converter can flow stably under harsh working conditions by adding a bypass pipe and an ejector to the system, thereby ensuring the cooling effect of the frequency converter under high temperature and low frequency loads.
  • processor 520 is coupled to memory 510 via BUS bus 530 .
  • the inverter cooling control device 500 is also connected to an external storage device 550 through a storage interface 540 in order to recall external data.
  • the inverter cooling control device 500 is also connected to the network or another computer system (not shown) through the network interface 560, which will not be described in detail here.
  • the frequency converter cooling control method proposed by the present disclosure can be stored in a computer-readable storage medium, and when the program on the readable storage medium is read by the processor, the above-mentioned frequency converter cooling method is executed.
  • embodiments of the present disclosure may be provided as methods, apparatuses, or computer program products. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects.
  • the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk memory, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein. .
  • a computer program including: instructions that, when executed by a processor, cause the processor to perform the inverter cooling control method as described above.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

本公开公开了一种变频器冷却装置、冷却方法及空调设备。所述变频器冷却装置包括：进口管路；出口管道，其上设有第一电动阀；第一支路和第二支路，并联在所述进口管路和所述出口管道之间，所述第一支路用于冷却变频器柜体，所述第二支路用于冷却变频器模块；一旁通，其一端与压缩机出口管道连通，另一端与所述出口管道上的第一电动阀的出口管道连通，所述旁通上设有第二电动阀和引射器；和第三支路，其一端与所述引射器连通，另一端与所述第一电动阀的入口管道连通，第三支路上设有第三电动阀。

Description

变频器冷却装置、冷却方法及空调设备
相关申请的交叉引用
本申请是以CN申请号为202210806051.8，申请日为2022年7月8日的申请为基础，并主张其优先权，该CN申请的公开内容在此作为整体引入本申请中。
技术领域
本公开涉及空调技术领域，尤其涉及一种变频器冷却装置、冷却方法及使用该变频器冷却装置的空调设备。
背景技术
变频制冷压缩机组运行过程中，变频器在恶劣工况长时间运行，会导致其温度异常升高，为保证变频器正常工作，需要对其进行冷却。常规变频器冷却手段是增加散热装置，例如，使用风扇对变频器进行冷却。另一种冷却方式是在制冷循环系统中引出部分冷媒对变频器进行冷却降温。相关技术中公开了一种使变频器均匀降温的变频器冷却系统。该冷却系统通过从冷凝器出口引出两条冷媒流路分别对变频器箱体和变频器模块进行冷却，以解决制冷机组变频器在常规工况下降温冷却的问题。
发明内容
本公开采用的技术方案如下：
提出一种变频器冷却装置，包括：进口管路，其一端与冷凝器出口管道连通；出口管道，其上设有第一电动阀，一端与蒸发器进口管道连通；第一支路和第二支路，并联在所述进口管路和所述出口管道之间，所述第一支路用于冷却变频器柜体，所述第二支路用于冷却变频器模块；所述变频器冷却装置还包括：一旁通，其一端与压缩机出口管道连通，另一端与所述出口管道上的第一电动阀的出口管道连通，所述旁通上设有第二电动阀和引射器；和第三支路，其一端与所述引射器连通，另一端与所述第一电动阀的入口管道连通，第三支路上设有第三电动阀。
在一些实施例中，所述第一支路上设有第四电动阀和毛细管。
在一些实施例中，所述第二支路上设有第五电动阀，所述第五电动阀的两端并联 一支路，该支路上设有电子膨胀阀。
本公开还提出一种空调设备，所述空调设备包括上述的变频器冷却装置。
本公开还提出一种上述空调设备的变频器冷却方法，该方法根据环境温度、变频器柜内温度、变频器模块温度和/或压缩机运行频率控制出口管路与旁通连通，在高温和低频工况通过引射器的强制引流保证变频器的冷却效果。
在一些实施例中，所述变频器冷却方法包括：在机组开机状态，根据环境温度和设定环境温度高温值，按照第一预设策略控制旁通的开启和关闭；在机组正常运行状态，根据变频器柜内温度、变频器模块温度和两者设定温度最高值，按照第二预设策略控制旁通的开启和关闭；以及在机组处于低频运行状态，根据压缩机的运行频率、设定最小运行频率和设定频率低频值，按照第三预设策略控制旁通的开启和关闭。
在一些实施例中，所述第一预设策略控制包括：当环境温度小于设定环境温度高温值时，旁通关闭，第一支路和第二支路内的冷媒在出口汇合后通过第一电动阀直接与蒸发器连通；以及当环境温度大于等于设定环境温度高温值时，旁通开启，第一支路和第二支路内的冷媒在出口汇合后经过第三电动阀和引射器与旁通内的冷媒会合后与出口管道连通。
在一实施例中，所述第一预设策略控制包括以下步骤：机组开机时检测环境温度T，并判断环境温度T是否小于设定环境温度高温值TK1；如是，压缩机开启前t1分钟内打开第四电动阀、第五电动阀、第一电动阀和电子膨胀阀，机组进入正常运行状态；以及如否，压缩机开启前t1分钟内打开第四电动阀、第三电动阀、第二电动阀和电子膨胀阀，通过旁通和引射器稳定冷却变频器的冷媒流量，待压缩机开启t2分钟后，开启第五电动阀和第一电动阀，关闭第三电动阀和第二电动阀，机组进入正常运行状态。
在一些实施例中，所述第二预设策略控制包括：当变频器柜内温度小于设定柜内温度最高值，且变频器模块温度小于设定变频器模块温度最高值时，旁通关闭，第一支路和第二支路内的冷媒在出口汇合后通过出口管道直接与蒸发器连通；以及当变频器柜内温度大于等于设定柜内温度最高值，且变频器模块温度大于等于设定变频器模块温度最高值时，旁通开启，第一支路和第二支路内的冷媒在出口汇合后经第三电动阀和引射器与旁通内的冷媒会合后经出口管道连通与蒸发器连通。
在一些实施例中，所述第二预设策略控制包括以下步骤：压缩机开启t2分钟后，实时检测变频器柜内温度TG和变频器模块温度TM；判断变频器柜内温度TG是否小 于设定柜内温度最高值TK2，且变频器模块温度TM是否小于设定变频器模块温度最高值TK3；如是，开启第五电动阀和第一电动阀，关闭第三电动阀和第二电动阀，旁通关闭；以及如否，关闭第五电动阀和第一电动阀，打开第三电动阀和第二电动阀，旁通开启。
在一些实施例中，所述第三预设策略控制包括以下步骤：压缩机开启t2分钟后，检查压缩机运行频率，判断连续t3分钟内压缩机运行频率是否大于等于压缩机设定最小运行频率，且小于等于设定压缩机频率低频值；如是，打开第三电动阀和第二电动阀，开启旁通，关闭第五电动阀和第一电动阀；以及如否，打开第五电动阀和第一电动阀，旁通关闭。
在一些实施例中，当第二预设策略控制和第三预设策略控制中任一状态进入旁通强制冷却控制后，不再进入另一状态的控制，直到恢复正常状态。
在一些实施例中，当第二预设策略控制和第三预设策略控制相冲突时优先按第二预设策略控制旁通的开启和关闭。
本公开还提出一种非瞬时性计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器读取时执行上述的变频器冷却方法。
根据本公开的另一方面，还提出一种变频器冷却装置，包括：存储器；以及耦接至所述存储器的处理器，所述处理器被配置为基于存储在所述存储器的指令执行如上述的变频器冷却方法。
根据本公开的另一方面，还提出一种计算机程序，包括：指令，所述指令当由处理器执行时使所述处理器执行上述的变频器冷却方法。
附图说明
构成说明书的一部分的附图描述了本公开的实施例，并且连同说明书一起用于解释本公开的原理。
以下结合附图和具体实施例对本公开进行详细说明，其中：
图1是本公开的系统图；
图2是本公开变频器冷却控制方法中第一预设策略控制的流程图；
图3是本公开变频器冷却控制方法中第二预设策略控制的流程图；
图4是本公开变频器冷却控制方法中第三预设策略控制的流程图；以及
图5为本公开变频器冷却控制装置的一些实施例的结构示意图。
图1中：
1-压缩机、2-油分离器、3-冷凝器、4-节流装置、5-蒸发器、6-第四电动阀、7-第五电动阀、8-毛细管、9-电子膨胀阀、10-变频器、11-第一电动阀、12-第三电动阀、13-引射器、14-第二电动阀、15-进口管路、16-第一支路、17-第二支路、18-出口管路、19-第三支路、20-旁通、21-支路。
流程图中：
T-环境温度、TK1-设定环境温度高温值、TG-变频器柜内温度、TM-变频器模块温度、TK2-设定变频器柜内温度高温值、TK3-设定变频器模块温度高温值；
t1-压缩机开启前时间间隔、t2-压缩机开启后时间间隔；t3-连续检测时间；
f-压缩机运行频率、fl-压缩机设定最小运行频率、fd-设定压缩机频率低频值。
应当明白，附图中所示出的各个部分的尺寸并不必须按照实际的比例关系绘制。此外，相同或类似的参考标号表示相同或类似的构件。
具体实施方式
现在将参照附图来详细描述本公开的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本公开的范围。
同时，应当明白，为了便于描述，附图中所示出的各个部分的尺寸并不是按照实际的比例关系绘制的。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本公开及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为说明书的一部分。
在这里示出和讨论的所有示例中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它示例可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
为了使本公开的目的、技术方案及优点更加清楚，以下结合附图和实施例对本公开进行详细的说明。应当理解，以下具体实施例仅用以解释本公开，并不对本公开构成限制。
使用风扇对变频器进行冷却，这种冷却方式使得变频器空间结构增加，成本增大，而冷却效果却不佳。在制冷循环系统中引出部分冷媒对变频器进行冷却降温，风冷冷水机组在实际运行中，会存在高温工况(环境温度43℃-52℃)的运行状态，在高温工况下，变频器冷却流路中冷媒量较少或者无冷媒，此时会使变频器存在超温的风险。另外，当压缩机长时间低频负荷情况时，系统高低压差较小，也会使变频器冷却流路中冷媒量偏少，此时冷量不足以使变频器降温。
如图1所示，变频制冷循环系统包括：用管路依次连通的压缩机1、油分离器2、冷凝器3、节流装置4和蒸发器5。压缩机排出的高温高压冷媒在油分离器2中过滤掉润滑油后，在冷凝器3中冷却为中温高压的液体，然后经过节流装置4后变成低温低压的液体，接着在蒸发器5中气化为低温低压的气体，再通过压缩机1循环。为满足不同的负荷要求，压缩机通常采用变频压缩机，为保证变频器正常工作需要对其进行冷却。
本公开提出的变频器冷却装置包括：进口管路15，其一端与冷凝器3的出口管道连通，另一端与并联的第一支路16和第二支路17连通，第一支路16经过变频器柜体后与出口管道18连通，第二支路17经过变频器模块后与出口管道18连通，出口管路18的另一端与蒸发器5的进口管道连通，出口管道18上设有第一电动阀11。
第一支路16用于对变频器柜体进行冷却，其上设有第四电动阀6，用于通过开启或关闭控制冷媒是否流经第一支路，从而控制是否需要对变频器的柜体进行降温。
在一些实施例中，第一支路上还设置毛细管8，用于控制第一支路进口端与出口端的压差，限制冷媒流经第一支路的速度，增强换热效果。
在一些实施例中，第一支路在变频器柜体内的部分紧贴在柜体内侧壁，以蛇形管的方式设置。
第二支路17用于对变频器模块进行冷却，其上设有第五电动阀7，其作用同样是通过开启或关闭控制冷媒是否流经第二支路，从而控制是否需要对变频器模块进行降温。
在一些实施例中，第五电动阀7的两端还并联一支路21，该支路上设有电子膨胀阀9，通过调整电子膨胀阀的开度来调节第二支路内的冷媒流速。
在一些实施例中，第二支路在柜内的部分紧贴变频器模块设置。当变频器工作模块的温度大于一定值时，降低冷媒流速，使流经变频器模块的冷媒温度更低，从而提高第二支路与变频器模块的换热效果，进而实现加快变频器模块降温速度的目的，变 频器模块的温度小于或等于一定值时，降低冷媒流速，同时流经第二支路的冷媒量也降低了，此时换热效果会降低，从而降低变频器模块的降温速度。
在高温工况，即温度高于温度阈值，例如，环境温度高于43°，或压缩机长时间低频负荷情况，即压缩机频率小于频率阈值，例如，压缩机频率低于额定频率40％，变频器冷却流路中冷媒量较少或者无冷媒，此时会使变频器存在超温的风险。针对这种情况，本公开在上述变频器冷却装置中增设了一旁通20和第三支路19，旁通的一端与压缩机1的出口管道连通，另一端与出口管道18上的第一电动阀11的出口管道连通。旁通20上依次设有第二电动阀14和引射器13。第三支路19上设有第三电动阀12，第三支路的一端与引射器13连通，另一端与第一电动阀11的入口管道连通。引射器13作为一个动力源部件，旁通中引入的引射流体对第三支路19中过来的被引射流体做功，提高其能量。也就是说，引射器对第一支路和第二支路中的冷媒有抽吸作用，利用这个抽吸作用提高和稳定第一支路和第二支路中冷媒的流量，从而保证冷媒对变频器柜体和变频器模块的冷却效果。
在一些实施例中，根据环境温度、变频器柜内温度、变频器模块温度和压缩机运行频率中的至少一项，控制出口管路与旁通连通；以及在高温和低频工况下，通过旁通和引射器对冷媒引流，以保证变频器的冷却效果。
本公开提出的变频器冷却方法包括：在机组开机状态，根据环境温度和设定环境温度高温值，按照第一预设策略控制旁通的开启和关闭；在机组正常运行状态，根据变频器柜内温度、变频器模块温度和这两个温度的设定温度最高值，按照第二预设策略控制旁通的开启和关闭；以及在机组处于低频运行状态，根据压缩机的运行频率、压缩机设定最小运行频率和设定压缩机频率低频值，按照第三预设策略控制旁通的开启和关闭。
所述第一预设策略控制应用于机组开机状态，包括：当环境温度小于设定环境温度高温值时，旁通20关闭，第一支路16和第二支路17内的冷媒在出口汇合后通过出口管道18与蒸发器5连通；以及当环境温度大于等于设定环境温度高温值时，旁通20开启，第一支路16和第二支路17内的冷媒在出口汇合后经第三电动阀12和引射器13与旁通内的冷媒会合后通过出口管道18与蒸发器5连通。
如图1和图2所示，第一预设策略控制包括以下步骤。
机组在开机状态下，检测环境温度T，并判断环境温度T是否小于设定环境温度高温值TK1。
当检测到环境温度T小于设定环境温度高温值TK1时，按照常规控制对变频器进行冷却。压缩机开启前t1分钟内，第四电动阀6、第五电动阀7、第一电动阀11和电子膨胀阀9打开。①机组冷媒主流路：1→2→3→4→5→1；②变频器柜内冷却冷媒流路：1→2→3→6→8→10→11→5→1；③变频器模块冷却冷媒流路：1→2→3→7、9→10→11→5→1。
当检测到环境温度T大于等于设定环境温度高温值TK1时，此时环境温度过高，变频器柜内温度和模块温度存在超温风险，此时开启旁通20，利用旁通和引射器13强制引流保证变频器的冷却。压缩机开启前t1分钟内，第四电动阀6、第三电动阀12、第二电动阀14和电子膨胀阀9打开。此时，
①机组冷媒主流路：1→2→3→4→5→1；
②变频器柜内冷却冷媒流路：1→2→3→6→8→10→12→13→5→1；
③变频器模块冷却冷媒流路：1→2→3→7、9→10→12→13→5→1；
④旁通冷媒流路：1→14→13→5→1。
待压缩机开启t2分钟后，冷媒稳定流通，先打开第五电动阀7、第一电动阀11，然后关闭第三电动阀12、第二电动阀14，此时冷媒流路按照常规控制对变频器进行冷却。
所述第二预设策略控制用于机组正常运行状态，包括：当变频器柜内温度小于设定柜内温度最高值，且变频器模块温度小于设定变频器模块温度最高值时，旁通关闭，第一支路和第二支路内的冷媒在出口汇合后直接与出口管道连通；以及当变频器柜内温度大于等于设定柜内温度最高值，且变频器模块温度大于等于设定变频器模块温度最高值时，旁通开启，第一支路和第二支路内的冷媒在出口汇合后经引射器，并与旁通内的冷媒会合后与出口管道连通。
如图1和图3所示，第二预设策略控制包括以下步骤。
压缩机开启t2分钟后，检测变频器柜内温度TG和变频器模块温度TM，并判断变频器柜内温度TG是否小于设定柜内温度最高值TK2，且变频器模块温度TM是否小于设定变频器模块温度最高值TK3，TG＜TK2且TM＜TK3。
当判断结果为是时，各电动阀开启与关闭状态保持原状，(第四电动阀6、第五电动阀7、电子膨胀阀9、第一电动阀11打开，第三电动阀12、第二电动阀14关闭)，冷媒流路不变，持续进入变频器柜内温度TG和变频器模块温度TM的检测判断。
当判断结果为否时，打开第三电动阀12、第二电动阀14、电子膨胀阀9，旁通开 启，关闭第五电动阀7和第一电动阀11。
再次检测变频器柜内温度TG和变频器模块温度TM，并判断是否TG＜TK2且TM＜TK3。
当判断结果为是时，打开第五电动阀7、第一电动阀11，关闭第三电动阀12、第二电动阀14，冷媒流路与正常状态，不开通旁通20的冷媒流路相同；之后重新进入变频器柜内温度TG和变频器模块温度TM的检测和判断。
当判断结果为否时，各电动阀的状态保持不变，冷媒流路不变，并返回继续进行检测判断。
所述第三预设策略控制用于压缩机低频运行状态，包括：当压缩机运行频率大于等于压缩机设定最小运行频率，且小于等于设定压缩机频率低频值时，开启旁通；以及当压缩机运行频率小于压缩机设定最小运行频率，且大于设定压缩机频率低频值时，关闭旁通。
如图1和图4所示，第三预设策略控制包括以下步骤。
在压缩机开启t2分钟后，检测压缩机运行频率f并判断是否连续t3分钟内满足fl≤f≤fd。
当判断结果为否时，各电动阀的状态保持不变，旁通关闭，重新进入压缩机运行频率f的检测和判断。
当判断结果为是时，打开第三电动阀12、第二电动阀14，旁通开启，第五电动阀7、第一电动阀11关闭，此时变频器出口的冷媒与旁通内的冷媒经引射器13后流至蒸发器5；之后重新进入压缩机运行频率f的检测并判断，即判断是否连续t3分钟内满足fl≤f≤fd。
当判断结果为是时，维持各电动阀的原状，并持续对压缩机运行频率进行检测和判断，此时，第五电动阀7、第一电动阀11关闭，第三电动阀12、第二电动阀14开启，变频器出口的冷媒与旁通引入的冷媒经引射器后流至蒸发器。
当判断结果为否时，打开第五电动阀7和第一电动阀11，关闭第三电动阀12和第二电动阀14，旁通关闭，之后重新进入压缩机运行频率的检测和判断。
第二预设策略控制和第三预设策略控制的优先级按以下步骤进行：当第二预设策略控制和第三预设策略控制中的任一状态进入旁通强制冷却控制后，即第三电动阀12、第二电动阀14打开，第五电动阀7、第一电动阀11关闭时，不再进入另一状态的控制，直到恢复正常状态为止。
当第二预设策略控制和第三预设策略控制相冲突时，优先满足第二预设策略控制旁通的开启和关闭。
本公开通过在系统中附加旁通管路和引射器确保了恶劣工况下变频器冷却流路中冷媒能够稳定流通，从而保证在高温和低频负荷下的变频器冷却效果。
图5为本公开变频器冷却控制装置的一些实施例的结构示意图。该变频器冷却控制装置500包括存储器510和处理器520。其中：存储器510可以是磁盘、闪存或其它任何非易失性存储介质。存储器510用于存储上述实施例中的指令。处理器520耦接至存储器510，作为一个或多个集成电路来实施，例如微处理器或微控制器。该处理器520用于执行存储器中存储的指令。
在一些实施例中，处理器520通过BUS总线530耦合至存储器510。在一些实施例中，该变频器冷却控制装置500还通过存储接口540连接至外部存储装置550以便调用外部数据。在一些实施例中，该变频器冷却控制装置500还通过网络接口560连接至网络或者另外一台计算机系统(未标出)，此处不再进行详细介绍。
在该实施例中，通过存储器存储数据指令，再通过处理器处理上述指令，能够保证在高温和低频负荷下的变频器冷却效果。
本公开提出的变频器冷却控制方法可存储于计算机可读存储介质内，当该可读存储介质上的程序被处理器读取时执行上述变频器冷却方法。本领域内的技术人员应明白，本公开的实施例可提供为方法、装置、或计算机程序产品。因此，本公开可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本公开可采用在一个或多个其中包含有计算机可用程序代码的计算机可用非瞬时性存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
在一些实施例中，提供一种计算机程序，包括：指令，所述指令当由处理器执行时使所述处理器执行如前所述的变频器冷却控制方法。
以上所述仅为本公开的具体实施方式。应当指出的是，凡在本公开构思的精神和框架内所做出的任何修改、等同替换和变化，都应包含在本公开的保护范围之内。

Claims (17)

  1. 一种变频器冷却装置，包括：
    进口管路，其一端与冷凝器出口管道连通；
    出口管道，其上设有第一电动阀，一端与蒸发器进口管道连通；
    第一支路和第二支路，并联在所述进口管路和所述出口管道之间，所述第一支路被配置为冷却变频器柜体，所述第二支路被配置为冷却变频器模块；
    旁通，其一端与压缩机出口管道连通，另一端与所述出口管道上的第一电动阀的出口管道连通，所述旁通上设有第二电动阀和引射器；以及
    第三支路，其一端与所述引射器连通，另一端与所述第一电动阀的入口管道连通，第三支路上设有第三电动阀。
  2. 如权利要求1所述的变频器冷却装置，其中，所述第一支路上设有第四电动阀和毛细管。
  3. 如权利要求1所述的变频器冷却装置，其中，所述第二支路上设有第五电动阀。
  4. 如权利要求3所述的变频器冷却装置，其中，所述第五电动阀的两端并联一支路，该支路上设有电子膨胀阀。
  5. 一种空调设备，其中，所述空调设备包括权利要求1-4任一项所述的变频器冷却装置。
  6. 一种权利要求5所述空调设备的变频器冷却方法，包括：
    根据环境温度、变频器柜内温度、变频器模块温度和压缩机运行频率中的至少一项，控制出口管路与旁通连通；以及
    在高温和低频工况下，通过旁通和引射器对冷媒引流。
  7. 如权利要求6所述的变频器冷却方法，还包括：
    在空调设备开机状态，根据环境温度和设定环境温度高温值，按照第一预设策略控制旁通的开启和关闭；
    在空调设备正常运行状态，根据变频器柜内温度、变频器模块温度和两者设定温度最高值，按照第二预设策略控制旁通的开启和关闭；以及
    在空调设备处于低频运行状态，根据压缩机的运行频率、设定最小运行频率和设定频率低频值，按照第三预设策略控制旁通的开启和关闭。
  8. 如权利要求7所述的变频器冷却方法，其中，所述第一预设策略控制包括：
    在所述环境温度小于所述设定环境温度高温值的情况下，旁通关闭，第一支路和第二支路内的冷媒在出口汇合后通过第一电动阀直接与蒸发器连通；以及
    在所述环境温度大于等于所述设定环境温度高温值的情况下，旁通开启，第一支路和第二支路内的冷媒在出口汇合后经过第三电动阀和引射器与旁通内的冷媒汇合后经出口管道与蒸发器连通。
  9. 如权利要求8所述的变频器冷却方法，其中，所述第一预设策略控制包括以下步骤：
    机组开机时检测环境温度T，并判断环境温度T是否小于设定环境温度高温值TK1；
    在环境温度T小于设定环境温度高温值TK1的情况下，压缩机开启前t1分钟内打开第四电动阀、第五电动阀、第一电动阀和电子膨胀阀，机组进入正常运行状态；以及
    在环境温度T大于或等于设定环境温度高温值TK1的情况下，压缩机开启前t1分钟内打开第四电动阀、第三电动阀、第二电动阀和电子膨胀阀，通过旁通和引射器稳定冷却变频器的冷媒流量，待压缩机开启t2分钟后，开启第五电动阀、第一电动阀，关闭第三电动阀和第二电动阀，机组进入正常运行状态。
  10. 如权利要求7所述的变频器冷却方法，其中，所述第二预设策略控制包括：
    在变频器柜内温度小于设定柜内温度最高值，且变频器模块温度小于设定变频器模块温度最高值的情况下，旁通关闭，第一支路和第二支路内的冷媒在出口汇合后通过出口管道直接与蒸发器连通；以及
    在变频器柜内温度大于等于设定柜内温度最高值，且变频器模块温度大于等于设定变频器模块温度最高值的情况下，旁通开启，第一支路和第二支路内的冷媒在出口汇合后经第三电动阀和引射器与旁通内的冷媒会合后通过出口管道与蒸发器连通。
  11. 如权利要求10所述的变频器冷却方法，其中，所述第二预设策略控制包括以下步骤：
    压缩机开启t2分钟后，检测变频器柜内温度TG和变频器模块温度TM；
    判断变频器柜内温度TG是否小于设定柜内温度最高值TK2，且变频器模块温度TM是否小于设定变频器模块温度最高值TK3；
    在变频器柜内温度TG小于设定柜内温度最高值TK2，且变频器模块温度TM小于 设定变频器模块温度最高值TK3的情况下，开启第五电动阀和第一电动阀，关闭第三电动阀和第二电动阀，旁通关闭；以及
    在满足变频器柜内温度TG大于或等于设定柜内温度最高值TK2，或变频器模块温度TM大于或等于设定变频器模块温度最高值TK3中的至少一项的情况下，关闭第五电动阀和第一电动阀，打开第三电动阀和第二电动阀，旁通开启。
  12. 如权利要求7所述的变频器冷却方法，其中，所述第三预设策略控制包括以下步骤：
    压缩机开启t2分钟后，检查压缩机运行频率，并判断连续t3分钟内压缩机运行频率是否大于等于压缩机设定最小运行频率，且小于等于设定压缩机频率低频值；
    在连续t3分钟内压缩机运行频率大于等于压缩机设定最小运行频率，且小于等于设定压缩机频率低频值的情况下，打开第三电动阀和第二电动阀，开启旁通，关闭第五电动阀和第一电动阀；
    在连续t3分钟内压缩机运行频率小于压缩机设定最小运行频率，或者大于设定压缩机频率低频值的情况下，打开第五电动阀和第一电动阀，旁通关闭。
  13. 如权利要求7所述的变频器冷却方法，其中，当第二预设策略控制和第三预设策略控制中任一状态进入旁通强制冷却控制后，不再进入另一状态的控制，直到恢复正常状态。
  14. 如权利要求7所述的变频器冷却方法，其中，当第二预设策略控制和第三预设策略控制相冲突时优先按第二预设策略控制旁通的开启和关闭。
  15. 一种非瞬时性计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器读取时执行权利要求6至14中任一项所述的变频器冷却方法。
  16. 一种变频器冷却装置，包括：
    存储器；以及
    耦接至所述存储器的处理器，所述处理器被配置为基于存储在所述存储器的指令执行如权利要求6至14中任一项所述的变频器冷却方法。
  17. 一种计算机程序，包括：
    指令，所述指令当由处理器执行时使所述处理器执行根据权利要求6至14中任一项所述的变频器冷却方法。
PCT/CN2023/089832 2022-07-08 2023-04-21 变频器冷却装置、冷却方法及空调设备 WO2024007685A1 (zh)

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