CN116412116A - Control method, device, equipment and medium for exhaust temperature of compressor - Google Patents

Control method, device, equipment and medium for exhaust temperature of compressor Download PDF

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Publication number
CN116412116A
CN116412116A CN202111637018.9A CN202111637018A CN116412116A CN 116412116 A CN116412116 A CN 116412116A CN 202111637018 A CN202111637018 A CN 202111637018A CN 116412116 A CN116412116 A CN 116412116A
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CN
China
Prior art keywords
compressor
exhaust temperature
opening
exhaust
air valve
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Pending
Application number
CN202111637018.9A
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Chinese (zh)
Inventor
高科科
曹正
龚纯
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Guangdong Midea White Goods Technology Innovation Center Co Ltd
Original Assignee
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Guangdong Midea White Goods Technology Innovation Center Co Ltd
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Publication date
Application filed by Midea Group Co Ltd, GD Midea Air Conditioning Equipment Co Ltd, Guangdong Midea White Goods Technology Innovation Center Co Ltd filed Critical Midea Group Co Ltd
Priority to CN202111637018.9A priority Critical patent/CN116412116A/en
Priority to PCT/CN2022/135509 priority patent/WO2023124723A1/en
Publication of CN116412116A publication Critical patent/CN116412116A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • 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
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2201/00—Pump parameters
    • F04B2201/08—Cylinder or housing parameters
    • F04B2201/0801—Temperature
    • 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
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Computer Hardware Design (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Conditioning Control Device (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Abstract

The invention discloses a control method, a device, equipment and a medium for exhaust temperature of a compressor, wherein the method comprises the following steps: when the compressor is detected to be in a target operation stage, acquiring an exhaust parameter of the compressor, wherein the exhaust parameter at least comprises the exhaust temperature of the compressor; and adjusting the opening degree of the induced air valve in the target operation stage according to the exhaust temperature. By adopting the invention, the intelligent and convenient adjustment of the exhaust temperature of the compressor can be realized, and the promotion of the equipment popularization is facilitated.

Description

Control method, device, equipment and medium for exhaust temperature of compressor
Technical Field
The invention belongs to the field of clothes dryers, and particularly relates to a control method, a device, equipment and a medium for exhaust temperature of a compressor.
Background
When the exhaust temperature of the compressor is too high, not only can the refrigerant and the lubricating oil be decomposed under the contact of substances such as metal and the like to generate carbon deposits, acids and the like, but also the viscosity of the lubricating oil can be reduced, so that the compressor is undesirably worn, and even the built-in motor of the compressor is burnt. In summary, excessive discharge temperatures can affect compressor life. Currently, in practical applications, such as a dryer provided with a compressor, the exhaust temperature of the compressor is lowered by increasing the compressor radiator fan. However, this solution requires adding an additional cooling fan in the dryer, which is costly, and results in an increase in the price of the dryer, which is not conducive to popularization.
Disclosure of Invention
The invention aims to solve the technical problem of high cost caused by increasing a cooling fan of a compressor to reduce the exhaust temperature of the compressor in the prior art, and provides a control method, a device, equipment and a medium for the exhaust temperature of the compressor.
In a first aspect, an embodiment of the present invention provides a method for controlling a discharge temperature of a compressor, including:
when the compressor is detected to be in a target operation stage, acquiring an exhaust parameter of the compressor, wherein the exhaust parameter at least comprises the exhaust temperature of the compressor;
and adjusting the opening of the induced air valve in the target operation stage according to the exhaust temperature and the change trend information so as to adjust the exhaust temperature of the compressor.
When the compressor is detected to be in the target operation stage, the embodiment of the invention acquires the exhaust parameters of the compressor, wherein the exhaust parameters at least comprise the exhaust temperature of the compressor, and the opening of the induced air valve in the target operation stage is regulated according to the exhaust temperature, so that the exhaust temperature of the compressor is regulated, and the exhaust temperature of the compressor is regulated by directly controlling the opening of the induced air valve, so that the convenience and the accuracy of the exhaust temperature regulation of the compressor can be improved, the equipment cost can be saved, and the equipment popularization is facilitated.
In some embodiments, before the adjusting the opening of the induced valve in the target operation stage according to the exhaust gas temperature, the method further includes:
acquiring change trend information of the exhaust parameters along with time change;
the adjusting the opening of the induced air valve in the target operation stage according to the exhaust temperature comprises:
and adjusting the opening of the induced air valve in the target operation stage according to the exhaust temperature and the change trend information so as to adjust the exhaust temperature of the compressor.
According to the embodiment of the invention, when the compressor is detected to be in the target operation stage, the exhaust parameters and the change trend information of the compressor along with the change of the exhaust parameters are obtained, the opening of the induced air valve in the target operation stage is adjusted according to the exhaust parameters and the change trend information, and then the exhaust temperature of the compressor is adjusted, so that the exhaust temperature of the compressor is adjusted by directly controlling the opening of the induced air valve, the convenience and the accuracy of the exhaust temperature adjustment of the compressor can be improved, the equipment cost can be saved, and the popularization of the equipment is facilitated.
In some embodiments, the target operation stage is a temperature raising stage, and adjusting the opening of the induced air valve in the target operation stage according to the exhaust temperature and the change trend information includes: if the change trend information indicates that the exhaust temperature changes with time to be in an ascending trend, and the exhaust temperature exceeds a first threshold value, increasing the opening of the induced air valve to a preset valve opening; and after the temperature of the exhaust gas of the compressor rises above a second threshold value, continuously increasing the opening of the induced air valve until the opening of the induced air valve reaches a preset upper limit opening so as to reduce the temperature of the exhaust gas of the compressor, wherein the second threshold value is larger than the first threshold value.
In the embodiment of the invention, when the exhaust temperature is identified to be in a rising/heating trend along with the change of time and exceeds the first threshold value, the opening of the induced air valve can be increased to the preset valve opening; when the exhaust temperature rises to the target exhaust temperature, and the target exhaust temperature exceeds a second threshold value, the opening of the induced air valve can be continuously increased to the preset upper limit opening so as to reduce the exhaust temperature of the compressor, and thus the exhaust temperature of the compressor can be reduced by increasing the opening of the valve when the exhaust temperature of the compressor is increased, and the compressor is further protected from damage.
In some embodiments, the target operation stage is a cooling stage, and adjusting the opening of the induced air valve in the target operation stage according to the exhaust temperature and the change trend information includes: and if the change trend information is used for indicating that the exhaust temperature changes along with time to be in a descending trend, and the exhaust temperature exceeds a first threshold value, reducing the opening of the induced air valve so as to maintain the exhaust temperature of the compressor within a preset standard range.
In the embodiment of the invention, when the change of the exhaust temperature along with the time is identified to be a descending/cooling trend, and the exhaust temperature exceeds the first threshold value, the opening of the induced air valve can be reduced so as to maintain the exhaust temperature of the compressor within the preset standard range, and thus, the exhaust temperature of the compressor can be maintained within the preset standard range by reducing the opening of the valve when the exhaust temperature of the compressor is reduced.
In some embodiments, the target operation stage is a temperature raising stage, the change trend information indicates a temperature raising rate of the exhaust temperature over time, and adjusting the opening of the induced air valve in the target operation stage according to the exhaust temperature and the change trend information includes: and if the temperature rising rate indicated by the change trend information exceeds a first rate and the exhaust temperature exceeds a first threshold, increasing the opening of the induced air valve until the opening reaches a preset upper limit opening so as to reduce the exhaust temperature of the compressor.
In the embodiment of the invention, when the temperature rising rate of the exhaust temperature changing along with time exceeds the first rate and the exhaust temperature exceeds the first threshold, the opening of the induced air valve can be increased until the preset upper limit opening is reached so as to reduce the exhaust temperature of the compressor, and thus the exhaust temperature of the compressor can be reduced by increasing the opening of the valve when the exhaust temperature of the compressor is increased, and the compressor is further protected from damage.
In some embodiments, the target operation stage is a cooling stage, the change trend information indicates a cooling rate of the exhaust temperature changing with time, and adjusting the opening of the induced air valve in the target operation stage according to the exhaust temperature and the change trend information includes: and if the cooling rate indicated by the change trend information exceeds the second rate and the exhaust temperature is lower than a first threshold value, reducing the opening of the induced air valve so as to maintain the exhaust temperature of the compressor within a preset standard range.
In the embodiment of the invention, when the cooling rate of the exhaust temperature is recognized to exceed the second rate and the exhaust temperature is lower than the first threshold, the opening of the induced draft valve can be reduced to maintain the exhaust temperature of the compressor within the preset standard range, so that the exhaust temperature of the compressor can be maintained within the preset standard range by reducing the opening of the valve when the exhaust temperature of the compressor is reduced.
In some embodiments, the exhaust parameter further includes an exhaust pressure, the target operation stage is a temperature raising stage, and adjusting the opening of the induced air valve in the target operation stage according to the exhaust temperature and the change trend information, so as to adjust the exhaust temperature of the compressor includes: and if the change trend information indicates that the exhaust pressure is in an ascending trend along with the change of time and the exhaust temperature exceeds a first threshold value, increasing the opening of the induced air valve until the opening of the induced air valve is up to a preset upper limit opening so as to reduce the exhaust temperature of the compressor.
According to the embodiment of the invention, when the exhaust pressure is identified to be in an ascending trend along with the time change and the exhaust temperature exceeds the first threshold, the opening of the induced air valve can be increased until the preset upper limit opening is reached to reduce the exhaust temperature of the compressor, so that the exhaust temperature of the compressor can be reduced by increasing the opening of the valve when the exhaust temperature of the compressor is higher and the exhaust pressure is gradually increased, and the compressor is further protected from damage.
In some embodiments, the exhaust parameter further includes an exhaust pressure, the target operation stage is a cooling stage, and adjusting the opening of the induced air valve in the target operation stage according to the exhaust temperature and the variation trend information, so as to adjust the exhaust temperature of the compressor includes: and if the change trend information indicates that the exhaust pressure is in a descending trend or a stable trend along with the change of time and the exhaust temperature exceeds a first threshold value, reducing the opening of the induced air valve so as to maintain the exhaust temperature of the compressor within a preset standard range.
In the embodiment of the invention, when the change of the exhaust pressure along with time is identified to be in a descending trend or a stable trend, and the exhaust temperature exceeds the first threshold value, the opening of the induced air valve can be reduced to maintain the exhaust temperature of the compressor within a preset standard range, so that the exhaust temperature of the compressor can be maintained within the preset standard range by reducing the opening of the valve when the exhaust temperature of the compressor is higher and the exhaust pressure gradually descends or tends to be stable.
In some embodiments, the target operating phase is a warm-up phase after the compressor is operated for a first preset duration, or the target operating phase is a cool-down phase after the compressor is operated for a second preset duration.
In a second aspect, an embodiment of the present invention provides a control apparatus for a discharge temperature of a compressor, including:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring exhaust parameters of a compressor when the compressor is detected to be in a target operation stage, and the exhaust parameters at least comprise the exhaust temperature of the compressor;
and the adjusting module is used for adjusting the opening degree of the induced air valve in the target operation stage according to the exhaust temperature so as to adjust the exhaust temperature of the compressor.
The descriptions or not described in the embodiments of the present invention may be referred to the relevant descriptions in the foregoing method embodiments, which are not repeated herein.
In a third aspect, an embodiment of the present invention provides an electrical home appliance, including a compressor, an air induction valve, and a processor, where the processor is configured to invoke a program stored in a memory to implement the method described in any implementation manner of the first aspect.
In a fourth aspect, embodiments of the present invention provide a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of the method provided in the first aspect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flow chart of a control method for exhaust temperature of a compressor according to an embodiment of the present invention.
Fig. 2 is a flow chart of another method for controlling the discharge temperature of a compressor according to an embodiment of the present invention.
Fig. 3 is a flow chart of another method for controlling the discharge temperature of a compressor according to an embodiment of the present invention.
Fig. 4 is a schematic view of an induced air valve in a clothes dryer according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a control device for exhaust temperature of a compressor according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a home appliance according to an embodiment of the present invention.
Detailed Description
In view of the technical problem of high cost caused by increasing a cooling fan of a compressor to reduce the exhaust temperature of the compressor in the prior art, the embodiment of the invention provides a control method, a device, equipment and a medium for the exhaust temperature of the compressor, when the compressor is detected to be in a target operation stage, the exhaust parameters at least comprise the exhaust temperature, the change trend information of the exhaust parameters along with the change of time is obtained, and finally the opening of an induced air valve in the target operation stage is regulated according to the obtained exhaust temperature and the change trend information, so that the exhaust temperature of the compressor is intelligently and conveniently regulated, the compressor is protected from being damaged, the equipment cost is saved, and the promotion of the equipment popularization is facilitated.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Hereinafter, a method for controlling the discharge temperature of the compressor according to the embodiments of the present specification will be described in detail with reference to the accompanying drawings.
Fig. 1 is a flow chart of a method for controlling exhaust temperature of a compressor according to an embodiment of the invention. The method as shown in fig. 1 may be applied to an electric home appliance configured with a compressor and an induced air valve, which may be an electric home appliance applied to adjust an exhaust temperature of the compressor, for example, including but not limited to a clothes dryer, an air conditioner, an air conditioning fan, a fresh air appliance, an electric heater, or other devices. The method comprises the following implementation steps:
s101, when the compressor is detected to be in a target operation stage, acquiring exhaust parameters of the compressor, wherein the exhaust parameters at least comprise the exhaust temperature of the compressor.
The target operation stage of the present invention refers to the current operation stage of the compressor, and the division standard is not limited, for example, the target operation stage can be divided into a heating stage and a cooling stage according to the change trend of the exhaust temperature of the compressor. The discharge parameters refer to parameters associated with describing the compressor discharge, which may include, but are not limited to, discharge temperature, discharge pressure, discharge time, discharge amount, or other discharge parameters, etc.
In practical application, in the household appliance (such as a clothes dryer or an air conditioner), in the running process of the household appliance, the control scheme of the exhaust temperature of the compressor provided by the invention can be implemented to protect the compressor from being stopped or damaged by over-temperature.
It can be understood that, in order to save energy consumption of the apparatus, the target operation stage of the present invention may specifically refer to an operation stage in which the compressor is operated for a certain period of time. For example, the heating stage after the compressor runs for a first preset time period may be specifically mentioned, the cooling stage after the compressor runs for a second preset time period may also be mentioned, so as to avoid collecting the exhaust parameters of the compressor before the first preset time period, at this time, the compressor just starts to run, and the exhaust temperature of the compressor is in a safe preset standard range, for example, still in a range of 0-105 ℃.
S102, adjusting the opening degree of the induced air valve in the target operation stage according to the exhaust temperature so as to adjust the exhaust temperature of the compressor.
In an embodiment, the opening degree of the induced air valve in the target operation stage can be directly adjusted according to the exhaust temperature, for example, when the exhaust temperature is greater than a preset upper temperature threshold value, the induced air valve can be closed. When the exhaust temperature is less than a preset lower temperature threshold, an induced draft valve and the like can be opened.
In another embodiment, before step S102, the present invention may acquire the trend information of the exhaust parameters over time.
The change trend information is used for representing the change information of the exhaust parameters along with the change of time, and can comprise, but is not limited to, a change trend such as a rising trend, a falling trend or a stable trend; the rate of change, such as the rate of rise (also referred to as the rate of rise), the rate of fall (also referred to as the rate of fall), and the like.
Then in step S102, the present invention may adjust the opening of the induced air valve in the target operation stage according to the exhaust temperature and the variation trend information, so as to adjust the exhaust temperature of the compressor.
The air inducing valve is a valve configured in household appliances and is used for introducing air into the household appliances so as to reduce the exhaust temperature of the compressor, thereby ensuring that the compressor is not stopped or damaged.
In a specific embodiment, the target operation stage is a temperature raising stage, and the change trend information is used for indicating a change trend of the exhaust temperature over time. Specifically, when the change trend information is used to indicate that the exhaust temperature changes with time to be in an ascending trend, and the exhaust temperature exceeds a first threshold value, the present invention may increase the opening of the induced air valve to a preset valve opening (for example, a preset opening 1, etc.). Further, the temperature of the exhaust gas of the compressor can be continuously increased, the invention can continuously obtain the temperature of the exhaust gas of the compressor, and when the temperature of the exhaust gas is increased to exceed a second threshold value, the invention can continuously increase the opening of the induced air valve until the opening of the induced air valve is at the preset upper limit, for example, the opening of the valve is continuously increased according to the preset step or the preset grade, so as to reduce the temperature of the exhaust gas of the compressor. Wherein the second threshold is greater than the first threshold.
In practical applications, the first threshold and the second threshold may refer to a single preset temperature threshold, or may refer to any temperature threshold in a preset temperature threshold range, etc., which is not limited by the present invention. For example, the first threshold may be any preset value from 60 ℃ to 105 ℃, the second threshold may be any preset value from 70 ℃ to 110 ℃, etc.
In yet another embodiment, the target operation stage is a temperature reduction stage, and the change trend information is used to indicate a change trend of the exhaust temperature over time. Specifically, when the change trend information is used for indicating that the exhaust temperature changes with time to be in a decreasing trend, and the exhaust temperature exceeds a first threshold value, the opening of the induced draft valve can be reduced, so that the exhaust temperature of the compressor is maintained within a preset standard range, for example, within a preset safe operation range of 60-105 ℃.
In yet another embodiment, the target operating phase is a warm-up phase, and the trend information is used to indicate a rate of change of the exhaust temperature over time. Specifically, when the exhaust temperature exceeds a first threshold value, the present invention may increase the opening of the induced air valve to a preset valve opening (e.g., a preset opening 1, etc.). Further, the invention can continuously acquire the exhaust parameters of the compressor, and analyze and acquire the change trend information of the exhaust parameters along with the change of time, wherein the change trend information is particularly used for indicating the temperature rising rate of the exhaust temperature along with the change of time. When the temperature rising rate exceeds the first speed and the exhaust temperature exceeds the first threshold, the invention can continuously increase the opening of the induced air valve until the opening reaches the preset upper limit opening, for example, continuously increasing the opening of the valve according to the preset step length or increasing the opening of the valve according to the preset grade, and the like, so as to reduce the exhaust temperature of the compressor.
In still another specific embodiment, the target operation stage is a cooling stage, the change trend information is used to indicate a change rate of the exhaust temperature changing with time, and the embodiment of the invention is specifically used to indicate the cooling rate of the exhaust temperature changing with time. Specifically, when the cooling rate indicated by the change trend information exceeds the second rate and the exhaust temperature is lower than the first threshold value, the opening of the induced air valve can be reduced, for example, the opening of the induced air valve is continuously reduced according to a preset reduction step length, or the opening of the valve is reduced according to a preset grade, and the like, so as to maintain the exhaust temperature of the compressor within a preset standard range.
In yet another embodiment, the target operation stage is a temperature increasing stage, and the change trend information is used to indicate a change trend of the exhaust pressure with time. Specifically, when the exhaust temperature exceeds a first threshold value, the present invention may increase the opening of the induced air valve to a preset valve opening (e.g., a preset opening 1, etc.). Further, the present invention may obtain the trend information, and when the trend information is used to indicate that the exhaust pressure changes with time to be in an upward trend, and the exhaust temperature exceeds the first threshold, the present invention may continuously increase the opening of the induced air valve until reaching a preset upper limit opening, for example, continuously increase the opening of the valve according to a preset step size or increase the opening of the valve according to a preset grade, so as to reduce the exhaust temperature of the compressor.
In yet another embodiment, the target operation stage is a temperature reduction stage, and the change trend information is used to indicate a change trend of the exhaust pressure with time. Specifically, when the change trend information is used for indicating that the exhaust pressure changes with time to be in a decreasing trend or a steady trend, and the exhaust temperature exceeds a first threshold value, the opening of the induced air valve can be reduced, for example, the opening of the valve is continuously reduced according to a preset reduction step, or the opening of the valve is reduced according to a preset level, so as to maintain the exhaust temperature of the compressor within a preset standard range.
It should be noted that, in addition to the above embodiments, the embodiment of the present invention may further adjust the opening of the induced air valve according to other exhaust parameters and the change trend information thereof, so as to achieve the purpose of adjusting the exhaust temperature of the compressor. For example, referring to the foregoing embodiments of adjusting the valve opening according to the exhaust gas temperature and the rate of change of the exhaust gas temperature, the present invention may adjust the valve opening according to the rate of change of the exhaust gas pressure (e.g., the rate of pressure increase or the rate of pressure decrease) and the exhaust gas temperature. Or, as another example, the present invention may adjust the opening of the air intake valve according to the exhaust temperature and the current exhaust time, specifically, when the exhaust temperature exceeds the first threshold value and the current exhaust time exceeds the first preset time (reflecting that the compressor is operated for a long time, etc.), the opening of the air intake valve may be gradually increased to reduce the exhaust temperature of the compressor, etc., which is not limited by the present invention.
In order to facilitate understanding of the technical solutions provided by the embodiments of the present invention, how to adjust the exhaust temperature of the compressor by controlling the opening of the induced air valve will be described below with reference to fig. 2 and 3, taking the trend and the rate of change of the exhaust temperature as examples.
Fig. 2 is a flow chart of another method for controlling the exhaust temperature of a compressor according to an embodiment of the invention. The method as shown in fig. 2 comprises the following implementation steps:
s201, when the compressor starts to run, the exhaust temperature of the compressor is obtained.
After the household appliance (such as a drying mode of a clothes dryer) is started, the compressor operates, and the invention can collect and acquire the exhaust temperature of the compressor.
For example, taking home appliances as an example of a dryer, please refer to fig. 4, which shows a back view of a dryer. In the dryer shown in fig. 4, a compressor is disposed at a position corresponding to 401, and 402 is denoted as an induced draft valve, and the dryer shown in the figure further includes other components, such as a condensation duct, an evaporator, a drum, etc., which are not described herein.
S202, when the exhaust temperature exceeds a first threshold T1, increasing the opening of the induced air valve to a preset valve opening (also referred to as a first opening, opening 1).
The first threshold value may also be referred to as an early warning temperature T1, and may specifically be a lower limit value or any value of a preset first threshold range (for example, 60-105 ℃), for example, 60 ℃. The first threshold value may also represent a preset first threshold value range (e.g., 60-105 ℃), and specifically, when the exhaust temperature is in the first threshold value range, the present invention may increase the opening of the induced air valve to the opening 1 or the like.
S203, continuously acquiring the exhaust temperature of the compressor, and analyzing and acquiring that the exhaust temperature changes with time to be in an ascending trend.
S204, judging whether the target exhaust temperature of the compressor exceeds a second threshold T2, wherein the sampling time of the target exhaust temperature is positioned after the sampling time of the exhaust temperature.
The invention can continuously monitor the exhaust temperature of the compressor in real time, if the exhaust temperature of the compressor continuously rises, when the target exhaust temperature of the compressor reaches/exceeds a second threshold T2, the invention can continuously execute step S205; otherwise, step S206 is continued.
In practical applications, the second threshold may also be a lower limit value or any value of a preset second threshold range (e.g. 70-110 ℃), for example 70 ℃. The second threshold may also represent a preset second threshold range (e.g., 70-110 ℃), and specifically, when the exhaust temperature is within the second threshold range, the present invention performs step S205; otherwise, step S206 is performed.
S205, continuously increasing the opening of the induced air valve.
According to the invention, after the exhaust temperature is detected to be in an ascending trend along with the time change and the exhaust temperature of the compressor reaches/exceeds T2, the opening of the induced air valve can be increased until the preset upper limit opening, so that the exhaust temperature of the compressor is reduced.
S206, judging whether the exhaust temperature of the compressor is in a preset standard range.
The invention can continuously monitor the exhaust temperature of the compressor, and if the exhaust temperature of the compressor begins to cool, i.e. the compressor is in a cooling stage, whether the exhaust temperature of the compressor is in a preset standard range can be judged. If yes, go on to step S209; otherwise, step S207 is continued. The preset standard range is a safe operation range set by system user definition, the lower limit value of the preset standard range is greater than or equal to the first threshold value, preferably the first threshold value, for example, the preset standard range is T1 60-105 ℃.
S207, judging whether the discharge temperature of the compressor is reduced to a third threshold value or not, wherein the third threshold value is larger than the first threshold value.
In the invention, when judging that the exhaust temperature of the compressor is not maintained/within the preset standard range, the invention can judge whether the exhaust temperature of the compressor is reduced to a third threshold value T3, wherein the third threshold value T3 is larger than the first threshold value T2. If yes, go on to step S208; otherwise, step S209 is performed.
S208, reducing the opening degree of the induced air valve so as to maintain the exhaust temperature of the compressor within the preset standard range.
In the invention, when the exhaust temperature of the compressor is detected to be reduced but not lower than the first threshold value, the opening of the induced air valve can be reduced, and the steps S207-S208 are circularly executed until the exhaust temperature of the compressor is maintained within the preset standard range.
S209, determining the opening degree of the induced air valve.
When the exhaust temperature of the compressor is maintained within the preset standard range, the opening of the induced air valve can be sent to a user for confirmation, for example, the induced air valve is displayed on a display interface of the household electrical appliance in the forms of short messages, characters, pictures or captions for confirmation by the user, and the like.
Fig. 3 is a flow chart of another method for controlling exhaust temperature of a compressor according to an embodiment of the invention. The method as shown in fig. 3 comprises the following implementation steps:
s301, when the compressor is started to run, the exhaust temperature of the compressor is obtained.
After the household appliance (such as a drying mode of a clothes dryer) is started, the compressor operates, and the invention can collect and acquire the exhaust temperature of the compressor.
S302, when the exhaust temperature exceeds a first threshold T1, increasing the opening of the induced air valve to a preset valve opening (also referred to as a first opening, opening 1).
The first threshold value may also be referred to as an early warning temperature T1, and may specifically be a lower limit value or any value of a preset first threshold range (for example, 60-105 ℃), for example, 60 ℃. The first threshold value may also represent a preset first threshold value range (e.g., 60-105 ℃), and specifically, when the exhaust temperature is in the first threshold value range, the present invention may increase the opening of the induced air valve to the opening 1 or the like.
S303, continuously acquiring the exhaust temperature of the compressor, and analyzing and acquiring the temperature rising rate of the exhaust temperature changing along with time.
S304, judging whether the temperature rising rate exceeds a first rate K1.
The invention can continuously monitor the exhaust temperature of the compressor in real time, and if the exhaust temperature of the compressor continuously rises (namely, the temperature rises) and the temperature rising rate exceeds the first rate K1, the invention can continuously execute the step S305; otherwise, step S306 may continue to be performed.
The first rate is set by the system in a self-defining way, and can be a single preset rate threshold value or any rate value within a preset first rate range, for example, any value in a range of 0.1 ℃/min-5 ℃/min. The first rate may also represent a preset first rate range, and specifically, the present invention may determine whether the heating rate is in the first rate range, if yes, step S305 may be executed; otherwise, step S306 is performed.
And S305, continuously increasing the opening of the induced air valve.
The invention can continuously increase the opening of the induced air valve until the preset upper limit opening so as to reduce the exhaust temperature of the compressor.
S306, judging whether the exhaust temperature of the compressor is in a preset standard range.
The invention can continuously monitor the exhaust temperature of the compressor, and if the exhaust temperature of the compressor begins to cool, i.e. the compressor is in a cooling stage, whether the exhaust temperature of the compressor is in a preset standard range can be judged. If yes, go on to step S309; otherwise, step S307 is continued. The preset standard range is a safe operation range set by system user definition, the lower limit value of the preset standard range is greater than or equal to the first threshold value, preferably the first threshold value, for example, the preset standard range is T1 60-105 ℃.
S307, judging whether the cooling rate of the compressor exceeds a second rate K2 and whether the exhaust temperature of the compressor is lower than a first threshold.
The invention can further monitor and acquire the cooling rate of the compressor and judge whether the cooling rate exceeds a second rate and whether the exhaust temperature of the compressor is lower than a first threshold. If yes, go on to step S308; otherwise, step S309 is performed.
The description of the second rate according to the present invention may refer to the description of the first rate, and will not be repeated here. The first rate and the second rate may be the same or different, and the present invention is not limited.
And S308, reducing the opening degree of the induced air valve so as to maintain the exhaust temperature of the compressor within the preset standard range.
When the temperature of the exhaust gas of the compressor is detected to be reduced, the opening of the induced air valve can be reduced when the temperature reduction rate is lower than the second rate or the temperature of the exhaust gas of the compressor exceeds the first threshold value, and the steps S307-S308 are circularly executed until the temperature of the exhaust gas of the compressor is maintained within the preset standard range.
S309, determining the opening degree of the induced air valve.
When the exhaust temperature of the compressor is maintained within the preset standard range, the opening of the induced air valve can be sent to a user for confirmation, for example, the induced air valve is displayed on a display interface of the household electrical appliance in the forms of short messages, characters, pictures or captions for confirmation by the user, and the like.
Based on the same inventive concept, the embodiment of the specification provides a control device for the exhaust temperature of a compressor and corresponding household electrical appliance. Fig. 5 is a schematic structural diagram of a control device for exhaust temperature of a compressor according to an embodiment of the present invention. As shown in fig. 5, the apparatus includes: an acquisition module 501 and a regulation module 502, wherein:
The obtaining module 501 is configured to obtain, when it is detected that the compressor is in a target operation stage, an exhaust parameter of the compressor, where the exhaust parameter includes at least an exhaust temperature of the compressor;
the adjusting module 502 is configured to adjust an opening of an induced air valve in the target operation stage according to the exhaust temperature, so as to adjust the exhaust temperature of the compressor.
In some embodiments of the present invention, in some embodiments,
the obtaining module 501 is further configured to obtain change trend information of the exhaust parameter over time;
the adjusting module 502 is specifically configured to adjust an opening of an induced air valve in the target operation stage according to the exhaust temperature and the change trend information, so as to adjust the exhaust temperature of the compressor.
In some embodiments, the target operation phase is a temperature increasing phase, and the adjustment module 502 is specifically configured to:
if the change trend information indicates that the exhaust temperature changes with time to be in an ascending trend, and the exhaust temperature exceeds a first threshold value, increasing the opening of the induced air valve to a preset valve opening;
and after the target exhaust temperature of the compressor exceeds a second threshold, continuously increasing the opening of the induced air valve until the opening of the induced air valve reaches a preset upper limit opening so as to reduce the exhaust temperature of the compressor, wherein the second threshold is larger than the first threshold after the sampling time corresponding to the exhaust temperature is reached by the sampling time corresponding to the target exhaust temperature.
In some embodiments, the target operation phase is a cooling phase, and the adjusting module 502 is specifically configured to:
and if the change trend information indicates that the exhaust temperature changes along with time and is in a descending trend, and the exhaust temperature exceeds a first threshold value, reducing the opening of the induced air valve so as to maintain the exhaust temperature of the compressor within a preset standard range.
In some embodiments, the target operation phase is a temperature rise phase, the trend information indicates a temperature rise rate of the exhaust temperature over time, and the adjustment control module 502 is specifically configured to: and if the temperature rising rate indicated by the change trend information exceeds a first rate and the exhaust temperature exceeds a first threshold, increasing the opening of the induced air valve until the opening reaches a preset upper limit opening so as to reduce the exhaust temperature of the compressor.
In some embodiments, the target operation stage is a cooling stage, the change trend information indicates a cooling rate of the exhaust gas temperature over time, and the adjustment control module 502 is specifically configured to:
and if the cooling rate indicated by the change trend information exceeds the second rate and the exhaust temperature is lower than a first threshold value, reducing the opening of the induced air valve so as to maintain the exhaust temperature of the compressor within a preset standard range.
In some embodiments, the exhaust parameters further include exhaust pressure, the target operating phase is a warm-up phase, and the adjustment control module 502 is specifically configured to:
and if the change trend information indicates that the exhaust pressure is in an ascending trend along with the change of time and the exhaust temperature exceeds a first threshold value, increasing the opening of the induced air valve until the opening of the induced air valve is up to a preset upper limit opening so as to reduce the exhaust temperature of the compressor.
In some embodiments, the exhaust parameters further include exhaust pressure, the target operation phase is a cooling phase, and the adjustment control module 502 is specifically configured to:
and if the change trend information indicates that the exhaust pressure is in a descending trend or a stable trend along with the change of time and the exhaust temperature exceeds a first threshold value, reducing the opening of the induced air valve so as to maintain the exhaust temperature of the compressor within a preset standard range.
In some embodiments, the target operation stage is a temperature raising stage after the compressor is operated for a first preset time period, or the target operation stage is a temperature lowering stage after the compressor is operated for a second preset time period.
With respect to the above-described apparatus, in which specific functions of the respective modules have been described in detail in the embodiments of the air conditioner control method provided in the embodiments of the present specification, detailed description will not be made here.
Based on the same inventive concept, the embodiment of the invention provides a household appliance, which is provided with a compressor and an induced air valve. Referring to fig. 6, the home appliance further includes a memory 604, a processor 602, and a computer program stored in the memory 604 and capable of running on the processor 602, wherein the processor 602 implements the control method of the compressor discharge temperature when executing the program.
Where in FIG. 6, a bus architecture (represented by bus 600), bus 600 may include any number of interconnected buses and bridges, with bus 600 linking together various circuits, including one or more processors, represented by processor 602, and memory, represented by memory 604. Bus 600 may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., as are well known in the art and, therefore, will not be described further herein. The bus interface 605 provides an interface between the bus 600 and the receiver 601 and transmitter 603. The receiver 601 and the transmitter 603 may be the same element, i.e. a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 602 is responsible for managing the bus 600 and general processing, while the memory 604 may be used to store data used by the processor 602 in performing operations.
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software that is executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated in one processing unit, each unit may exist alone physically, or two or more units may be integrated in one unit.
In the several embodiments provided in the present application, it should be understood that the disclosed technology content may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate components may or may not be physically separate, and components as control devices may or may not be physical units, may be located in one place, or may be distributed over a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above description is only an example of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (12)

1. A method of controlling a discharge temperature of a compressor, comprising:
when the compressor is detected to be in a target operation stage, acquiring an exhaust parameter of the compressor, wherein the exhaust parameter at least comprises the exhaust temperature of the compressor;
and adjusting the opening degree of the induced air valve in the target operation stage according to the exhaust temperature.
2. The control method according to claim 1, characterized in that before the adjusting of the opening degree of the induced valve in the target operation stage according to the exhaust gas temperature, the method further comprises:
acquiring change trend information of the exhaust parameters along with time change;
the adjusting the opening of the induced air valve in the target operation stage according to the exhaust temperature comprises:
and adjusting the opening of the induced air valve in the target operation stage according to the exhaust temperature and the change trend information.
3. The control method according to claim 2, wherein the target operation stage is a temperature increasing stage, and the adjusting the opening of the induced air valve in the target operation stage according to the exhaust temperature and the change trend information includes:
if the change trend information indicates that the exhaust temperature changes with time to be in an ascending trend, and the exhaust temperature exceeds a first threshold value, increasing the opening of the induced air valve to a preset valve opening;
and after the temperature of the exhaust gas of the compressor rises above a second threshold value, continuously increasing the opening of the induced air valve until the opening of the induced air valve reaches a preset upper limit opening so as to reduce the temperature of the exhaust gas of the compressor, wherein the second threshold value is larger than the first threshold value.
4. The method of claim 2, wherein the target operation phase is a cooling phase, and adjusting the opening of the induced air valve in the target operation phase according to the exhaust temperature and the change trend information comprises:
and if the change trend information indicates that the exhaust temperature changes along with time and is in a descending trend, and the exhaust temperature exceeds a first threshold value, reducing the opening of the induced air valve so as to maintain the exhaust temperature of the compressor within a preset standard range.
5. The method of claim 2, wherein the target operating phase is a warm-up phase, the trend information indicates a warm-up rate of the exhaust temperature over time, and adjusting the opening of the induced air valve in the target operating phase according to the exhaust temperature and the trend information comprises:
and if the temperature rising rate indicated by the change trend information exceeds a first rate and the exhaust temperature exceeds a first threshold, increasing the opening of the induced air valve until the opening reaches a preset upper limit opening so as to reduce the exhaust temperature of the compressor.
6. The method of claim 2, wherein the target operation phase is a cooling phase, the trend information indicates a cooling rate of the exhaust temperature over time, and adjusting the opening of the induced air valve in the target operation phase according to the exhaust temperature and the trend information comprises:
and if the cooling rate indicated by the change trend information exceeds the second rate and the exhaust temperature is lower than a first threshold value, reducing the opening of the induced air valve so as to maintain the exhaust temperature of the compressor within a preset standard range.
7. The method of claim 2, wherein the exhaust parameters further include exhaust pressure, the target operation phase is a temperature increasing phase, and adjusting the opening of the induced air valve in the target operation phase according to the exhaust temperature and the change trend information includes:
and if the change trend information indicates that the exhaust pressure is in an ascending trend along with the change of time and the exhaust temperature exceeds a first threshold value, increasing the opening of the induced air valve until the opening of the induced air valve is up to a preset upper limit opening so as to reduce the exhaust temperature of the compressor.
8. The method of claim 2, wherein the exhaust parameters further include exhaust pressure, the target operation phase is a cool-down phase, and adjusting the opening of the induced air valve in the target operation phase according to the exhaust temperature and the change trend information includes:
and if the change trend information indicates that the exhaust pressure is in a descending trend or a stable trend along with the change of time and the exhaust temperature exceeds a first threshold value, reducing the opening of the induced air valve so as to maintain the exhaust temperature of the compressor within a preset standard range.
9. The method of any one of claims 1-8, wherein the target operating phase is a warm-up phase after a first preset length of time of operation of the compressor or the target operating phase is a cool-down phase after a second preset length of time of operation of the compressor.
10. A control device for compressor discharge temperature, comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring exhaust parameters of a compressor when the compressor is detected to be in a target operation stage, and the exhaust parameters at least comprise the exhaust temperature of the compressor;
and the adjusting module is used for adjusting the opening degree of the induced air valve in the target operation stage according to the exhaust temperature.
11. An appliance comprising a compressor, an air induction valve and a processor for invoking a program stored in memory to perform the method of any of claims 1-9.
12. A computer readable storage medium, characterized in that a computer program is stored thereon, which program, when being executed by a processor, implements the steps of the method according to any of claims 1-9.
CN202111637018.9A 2021-12-29 2021-12-29 Control method, device, equipment and medium for exhaust temperature of compressor Pending CN116412116A (en)

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PCT/CN2022/135509 WO2023124723A1 (en) 2021-12-29 2022-11-30 Compressor exhaust temperature control method and apparatus, device and medium

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US5366352A (en) * 1993-12-13 1994-11-22 Deblois Raymond L Thermostatic compressor suction inlet duct valve
PL2077350T3 (en) * 2007-12-31 2011-12-30 Electrolux Home Products Corp Nv Electric household appliance and relative operating method
CN106164604B (en) * 2014-03-17 2019-01-22 三菱电机株式会社 Conditioner
CN104613615B (en) * 2015-02-03 2017-06-06 珠海格力电器股份有限公司 Air conditioner and control method thereof
CN105862369B (en) * 2016-05-26 2019-01-25 无锡小天鹅股份有限公司 Drying system and dryer or washing-drying integral machine with it
CN105951347B (en) * 2016-05-31 2019-05-21 无锡小天鹅股份有限公司 The heat pump mould group and device for clothing processing of device for clothing processing
JP6654529B2 (en) * 2016-08-23 2020-02-26 株式会社日立産機システム Package type compressor
CN113587338B (en) * 2021-06-28 2022-11-29 宁波奥克斯电气股份有限公司 Compressor exhaust temperature control method and device and air conditioner

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