CN108662730B - Protection system for refrigeration equipment and protection method for safe operation of compressor - Google Patents
Protection system for refrigeration equipment and protection method for safe operation of compressor Download PDFInfo
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- CN108662730B CN108662730B CN201810292056.7A CN201810292056A CN108662730B CN 108662730 B CN108662730 B CN 108662730B CN 201810292056 A CN201810292056 A CN 201810292056A CN 108662730 B CN108662730 B CN 108662730B
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- 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
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/005—Arrangement or mounting of control or safety devices of safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- 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
- F25B49/025—Motor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/19—Calculation of parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/024—Compressor control by controlling the electric parameters, e.g. current or voltage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0251—Compressor control by controlling speed with on-off operation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21153—Temperatures of a compressor or the drive means therefor of electronic components
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2116—Temperatures of a condenser
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2116—Temperatures of a condenser
- F25B2700/21162—Temperatures of a condenser of the refrigerant at the inlet of the condenser
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2116—Temperatures of a condenser
- F25B2700/21163—Temperatures of a condenser of the refrigerant at the outlet of the condenser
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a protection system of refrigeration equipment and a protection method for safe operation of a compressor, wherein the refrigeration cycle of the refrigeration equipment comprises the compressor, a condenser, a throttling unit and an evaporator, and the protection system is characterized by comprising the following components: a measurement module for measuring real-time data of the refrigeration cycle; the data acquisition module is electrically connected with the measurement module and is used for acquiring real-time data measured by the measurement module; the control module is electrically connected with the data acquisition module and the compressor; the control module is set to control the power-on or power-off of the compressor according to the real-time data collected by the data collection module. The protection system of the refrigeration equipment can effectively monitor the high-temperature demagnetization risk or the air operation explosion risk of the compressor, and has the advantages of high universality, low application difficulty, strong pertinence, high reaction speed and low cost.
Description
Technical Field
The invention belongs to the technical field of compressor manufacturing, and particularly relates to a protection system of refrigeration equipment and a protection method for safe operation of a compressor.
Background
Along with the continuous promotion of domestic air conditioner efficiency standard at home and abroad, individual energy-concerving and environment-protective consciousness continues to strengthen, and in the domestic air conditioner market, the use amount of inverter compressor increases very fast in recent years, but inverter compressor high temperature demagnetization fault rate becomes an important factor that restricts inverter compressor and promotes. In the process of implementing the invention, the inventor finds that the high-temperature demagnetization of the compressor is mainly caused by the blockage of a high-pressure flow path of the air conditioner, the continuous operation of the compressor, the ultrahigh suction-discharge pressure ratio and the higher suction temperature cause the discharge temperature of a pump body to be far higher than the normal working temperature of a magnet, the demagnetization of a rotor is caused, and finally the compressor fails.
Meanwhile, in the operation process of the refrigeration equipment, accidents that the compressor air is exploded due to the fact that the high-pressure side of the air conditioning system is blocked, the low-pressure side of the air conditioning system leaks, and the compressor continuously operates to suck air from the low-pressure side occasionally occur. The mechanism is similar to that of an internal combustion engine, and when air is continuously sucked, compressed and exhausted in an overheated mode, the compressor refrigerator oil is gasified to form an oil-gas mixture. When the temperature and pressure reach a certain condition, the refrigerating machine oil is self-ignited and exploded! Such accidents can lead to casualties and property loss.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a protection system of refrigeration equipment, which can effectively monitor the risk of high-temperature demagnetization or air operation explosion of a compressor.
The protection system of the refrigeration equipment comprises a compressor, a condenser, a throttling unit and an evaporator, and is characterized by comprising the following components: a measurement module for measuring real-time data of the refrigeration cycle; the data acquisition module is electrically connected with the measurement module and is used for acquiring real-time data measured by the measurement module; the control module is electrically connected with the data acquisition module and the compressor; the control module is set to control the power-on or power-off of the compressor according to the real-time data collected by the data collection module.
According to the protection system of the refrigeration equipment, the high-temperature demagnetization risk or the air operation explosion risk of the compressor can be effectively monitored, and the protection system is high in universality, low in application difficulty, strong in pertinence, high in reaction speed and low in cost.
According to an embodiment of the invention, the protection system of the refrigeration equipment comprises: a condition parameter measuring means for measuring a shell temperature Tc of the compressor, an inlet temperature Td of the condenser, and a condensing temperature Tcond of the condenser; an electrical parameter measuring means for measuring the operating current I of the compressor.
According to an embodiment of the invention, the protection system of the refrigeration equipment comprises the working condition parameter measuring component and a protection device, wherein the working condition parameter measuring component comprises: a first temperature measurer for detecting a shell temperature Tc of the compressor; a second temperature measurer for measuring an inlet temperature Td of the condenser; and the third temperature measurer is used for measuring the condensation temperature Tcond of the condenser.
According to the protection system of the refrigeration equipment, the control module is configured to control the compressor to be powered off when Tc is larger than Tcmax, wherein Tcmax is a preset upper limit value of the shell temperature of the compressor.
According to the protection system of the refrigeration equipment, the control module is configured to control the compressor to be powered off when Tc is larger than Tcmax, Dv is smaller than or equal to Dvmin and Imin is smaller than or equal to I and smaller than or equal to Imax, wherein Tcmax is a preset upper limit value of the shell temperature of the compressor, Dv is Td-Tc, Dvmin is a preset lower limit value of a difference value between the inlet temperature of the condenser and the shell temperature of the compressor, Imin is a preset lower limit value of the working current of the compressor, and Imax is a preset upper limit value of the working current of the compressor.
According to the protection system of the refrigeration equipment, the control module is configured to control the compressor to be powered off when Tc is more than Tcmax, Dv is less than or equal to Dvmin, Tcond is less than or equal to Tcondmax, Delta Tcond is less than or equal to Delta Tcondmin, and Imin is less than or equal to I is less than or equal to Imax, wherein Tcmax is a preset upper limit value of the shell temperature of the compressor, Dv is Td-Tc, Dvmin is a preset lower limit value of a difference value between the inlet temperature of the condenser and the shell temperature of the compressor, Imin is a preset lower limit value of the working current of the compressor, Imax is a preset upper limit value of the working current of the compressor, Tcondmax is a preset upper limit value of the condensation temperature of the condenser, Delta Tcond is a change rate of the condensation temperature, and Delta Tcondmin is a preset lower limit value of the change rate of the condensation temperature.
According to an embodiment of the invention, the protection system of the refrigeration equipment comprises: the device comprises a calculation unit, a register unit, a comparison unit and an output unit; the register unit is electrically connected with the data acquisition unit, the calculation unit and the comparison unit, the calculation unit is electrically connected with the comparison unit, and the output unit is electrically connected with the comparison unit; the computing unit is used for computing a computing result according to the real-time data and a preset computing program; the registering unit is used for registering preset parameters, the real-time data, the calculation result and the comparison result of the comparison unit; the comparison unit is used for comparing the preset parameters, the real-time parameters and the calculation results to obtain comparison results; the output unit is suitable for being electrically connected with the compressor or a switch of the refrigeration equipment and used for controlling the power-on or power-off of the compressor according to the comparison result.
The protection system of the refrigeration equipment according to one embodiment of the invention further comprises: and the alarm is electrically connected with the control module.
The invention also provides a protection method for safe operation of the compressor, which comprises the following steps: setting preset parameters for safe operation of the refrigeration equipment; measuring real-time data of the refrigeration equipment in the running state; and comparing the real-time data or a calculated value calculated according to the real-time data with the preset parameters, and outputting a control instruction according to a comparison result, wherein the control instruction comprises the step of controlling the compressor to be powered off.
According to an embodiment of the present invention, the method for protecting safe operation of a compressor, wherein the preset parameter includes a preset upper limit value Tcmax of a shell temperature of the compressor, the real-time data includes the shell temperature Tc of the compressor, and the step of comparing the real-time data or a calculated value calculated according to the real-time data with the preset parameter and outputting a control command according to a comparison result includes: when Tc is greater than Tcmax, the control module controls the compressor to be powered off.
According to an embodiment of the present invention, the preset parameters include a preset upper limit value Tcmax of a shell temperature of the compressor, a preset lower limit value Dvmin of a difference between an inlet temperature of the condenser and the shell temperature of the compressor, a preset lower limit value Imin of an operating current of the compressor, and a preset upper limit value Imax of the operating current of the compressor, the real-time data includes a shell temperature Tc of the compressor and an inlet temperature Td of the condenser, a calculated value calculated according to the real-time data includes Dv, Dv is Td-Tc, the step of comparing the real-time data or the calculated value calculated according to the real-time data with the preset parameters, and outputting a control command according to a comparison result includes: when Tc is more than Tcmax, Dv is less than or equal to Dvmin, and Imin is less than or equal to I and less than or equal to Imax, the control module controls the compressor to be powered off.
According to an embodiment of the present invention, the preset parameters include a preset upper limit value Tcmax of a shell temperature of the compressor, a preset lower limit value Dvmin of a difference between an inlet temperature of the condenser and a shell temperature of the compressor, a preset lower limit value Imin of an operating current of the compressor, a preset upper limit value Imax of an operating current of the compressor, a preset upper limit value Tcondmax of a condensing temperature of the condenser, a preset lower limit value Δ Tcondmin of a change rate of the condensing temperature, the real-time data includes the shell temperature Tc of the compressor and the inlet temperature Td of the condenser, a calculated value calculated from the real-time data includes Dv and the change rate Δ Tcond of the condensing temperature, Dv is Td-Tc, and the step compares the real-time data or the calculated value calculated from the real-time data with the preset parameters, and outputting a control command according to the comparison result comprises: and when Tc is more than Tcmax, Dv is less than or equal to Dvmin, Tcond is less than or equal to Tcondmax, Delta Tcond is less than or equal to Delta Tcondmin, and Imin is less than or equal to I and less than or equal to Imax, the control module controls the compressor to be powered off.
The protection method for the safe operation of the compressor has the same advantages as the protection system of the refrigeration equipment relative to the prior art, and is not described in detail herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of a shield system according to an embodiment of the present invention;
FIGS. 2 and 3 are schematic diagrams of data transmission in a guard system according to an embodiment of the invention;
fig. 4 to 6 are flowcharts of a protection method for safe operation of a compressor according to an embodiment of the present invention.
Reference numerals:
the compressor 10, the condenser 20, the throttling unit 30, the evaporator 40,
a measurement module 100, a first temperature measurer 110, a second temperature measurer 120, a third temperature measurer 130, an electrical parameter measurement part 140,
the data acquisition module 200 is configured to acquire data,
a control module 300, a calculation unit 310, a register unit 320, a comparison unit 330, an output unit 340,
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A protection system of a refrigeration appliance according to an embodiment of the present invention is described below with reference to fig. 1 to 3. The refrigeration equipment can be air conditioner and the like.
As shown in fig. 1, the refrigeration cycle of the refrigeration apparatus includes a compressor 10, a condenser 20, a throttling unit 30, and an evaporator 40, an exhaust port of the compressor 10 is connected to an inlet of the condenser 20 through a pipe, an outlet of the condenser 20 is connected to an inlet of the evaporator 40 through a pipe, the throttling unit 30 is disposed between the outlet of the condenser 20 and the inlet of the evaporator 40, the outlet of the evaporator 40 is connected to an intake port of the compressor 10 through a pipe, the compressor 10 is connected to a power supply 430, and a switch 420 is disposed between the compressor 10 and the power supply 430.
As shown in fig. 1 to 3, a protection system of a refrigerating apparatus according to an embodiment of the present invention includes: measurement module 100, data acquisition module 200, control module 300.
The measurement module 100 is configured to measure real-time data of the refrigeration cycle, where the real-time data may include temperatures of at least some devices in the refrigeration cycle or working temperatures of a refrigerant at various places in the refrigeration cycle, the data acquisition module 200 is electrically connected to the measurement module 100, the data acquisition module 200 is configured to acquire real-time data measured by the measurement module 100, the control module 300 is electrically connected to the data acquisition module 200, the data acquisition module 200 transmits the acquired real-time data of the refrigeration cycle to the control module 300, the control module 300 is electrically connected to the compressor 10, and the control module 300 is configured to control power on or power off of the compressor 10 according to the real-time data acquired by the data acquisition module 200.
That is to say, the protection system of the refrigeration equipment in the embodiment of the present invention determines whether the compressor 10 has a risk of high-temperature demagnetization or air operation explosion by monitoring the working data of the refrigeration equipment, finds a risk point in advance, and performs power-off processing on the compressor 10, so as to improve the operation safety of the refrigeration equipment.
According to the protection system of the refrigeration equipment, the high-temperature demagnetization risk or the air operation explosion risk of the compressor 10 can be effectively monitored, and the protection system is high in universality, low in application difficulty, strong in pertinence, high in reaction speed and low in cost.
As shown in fig. 2 and 3, the measurement module 100 includes: an operating condition parameter measuring part and an electrical parameter measuring part 140.
The operating condition parameter measuring device is configured to measure a shell temperature Tc of the compressor 10, an inlet temperature Td of the condenser 20, and a condensing temperature Tcond of the condenser 20, where the inlet temperature Td of the condenser 20 is approximately equal to an exhaust temperature of the compressor 10, and the condensing temperature Tcond of the condenser 20 is a condensing temperature of a refrigeration cycle of the refrigeration equipment, and can be represented by a middle temperature of the condenser 20.
The operating condition parameter measuring part may include: a first temperature measuring device 110, a second temperature measuring device 120, and a third temperature measuring device 130.
The first temperature measuring device 110 is used to detect the shell temperature Tc of the compressor 10, for example, the first temperature measuring device 110 is a thermal resistance sensor, and the first temperature measuring device 110 is mounted on the upper shell of the compressor 10.
The second temperature measuring device 120 is used to measure the inlet temperature Td of the condenser 20, for example, the second temperature measuring device 120 may be a thermocouple sensor, and the second temperature measuring device 120 is attached to the middle portion of the connection between the discharge pipe of the compressor 10 and the condenser 20, specifically, for a certain type of refrigeration equipment, the first U-turn of the rear connection pipe of the discharge pipe of the compressor 10 may be attached, and the inlet temperature Td of the condenser 20 is represented by the middle temperature of the connection pipe between the compressor 10 and the condenser 20, which may simplify the measurement of the inlet temperature Td of the condenser 20.
The third temperature measuring device 130 is used to measure the condensing temperature Tcond of the condenser 20, for example, the third temperature measuring device 130 is a thermal resistance sensor, and the third temperature measuring device 130 is attached to the middle portion of the condenser 20, specifically, for a certain type of refrigeration equipment, the third temperature measuring device 130 is attached to the first row and the fifth U-turn of the condenser 20.
The electrical parameter measuring part 140 is used for measuring an operating current I of the compressor 10, and the electrical parameter measuring part 140 includes: and a hall sensor for measuring R-phase current of the compressor 10.
As shown in fig. 2 and 3, the control module 300 includes: a calculating unit 310, a registering unit 320, a comparing unit 330, and an outputting unit 340.
The registering unit 320 is electrically connected to the data collecting unit, the calculating unit 310 and the comparing unit 330, the calculating unit 310 is electrically connected to the comparing unit 330, the output unit 340 is electrically connected to the comparing unit 330, the calculating unit 310 is used for calculating a calculation result according to the real-time data and a preset calculation program, the registering unit 320 is used for registering a preset parameter, the real-time data, the calculation result and a comparison result of the comparing unit 330, the comparing unit 330 is used for comparing the preset parameter, the real-time parameter and the calculation result to obtain a comparison result, and the output unit 340 is suitable for being electrically connected to the compressor 10 or a switch 420 of a refrigeration device and controlling the power-on or power-off of the compressor 10 according to the.
Referring to fig. 3, the protection system of the refrigeration appliance may further include: the alarm 410 and the alarm 410 are electrically connected with the control module 300, specifically, the alarm 410 is electrically connected with the output unit 340, and when the comparison result shows that the compressor 10 has the risk of high-temperature demagnetization or air operation explosion, the output unit 340 outputs a signal to the alarm 410.
In some embodiments, the control module 300 is configured such that the control module 300 controls the compressor 10 to be powered off when Tc > Tcmax, where Tcmax is a preset upper limit value for the shell temperature of the compressor 10, and Tcmax may be written to the control module 300 in advance. It is understood that when Tc > Tcmax, it is determined that there is an internal high temperature risk in the compressor 10, the control module 300 controls the alarm 410 to send an alarm signal and controls the switch 420 to cut off the power supply to the compressor 10.
In other embodiments, the control module 300 is configured to control the compressor 10 to power off when Tc > Tcmax, Dv ≦ Dvmin, and Imin ≦ I ≦ Imax, where Tcmax is a preset upper limit value of a shell temperature of the compressor 10, Dv ≦ Td-Tc, Dvmin is a preset lower limit value of a difference between an inlet temperature of the condenser 20 and the shell temperature of the compressor 10, Imin is a preset lower limit value of an operating current of the compressor 10, Imax is a preset upper limit value of the operating current of the compressor 10, and Tcmax, Dvmin, Imin, Imax may be written in the control module 300 in advance. It is understood that when the above conditions are simultaneously satisfied, it can be determined that there is a risk of high-pressure side blockage in the system, and the control module 300 controls the alarm 410 to send an alarm signal and controls the switch 420 to cut off the power supply to the compressor 10. If I does not satisfy Imin ≦ I ≦ Imax, then there may be another failure.
In still other embodiments, the control module 300 is configured to control the compressor 10 to power down when Tc > Tcmax, Dv ≦ Dvmin, Tcond ≦ Tcondmax, Δ Tcond ≦ Δ Tcondmin, and Imin ≦ I ≦ Imax, wherein Tcmax is a preset upper limit value of the shell temperature of the compressor 10, Dv is Td-Tc, Dvmin is a preset lower limit value of the difference between the inlet temperature of the condenser 20 and the shell temperature of the compressor 10, Imin is a preset lower limit value of the operating current of the compressor 10, Imax is a preset upper limit value of the operating current of the compressor 10, Tcondmax is a preset upper limit value of the condensing temperature of the condenser 20, Δ Tcond is a rate of change of the condensing temperature, Δ tcondin is a preset lower limit value of the rate of change of the condensing temperature, Tcmax, tconmax, dvimin, Δ Tcondmin, imjn, immax may be written in the control module 300 in advance. It is understood that when the above conditions are simultaneously satisfied, it may be determined that there is a risk of high-temperature demagnetization or air operation in the compressor 10, and the control module 300 controls the alarm 410 to send an alarm signal and controls the switch 420 to cut off the power supply to the compressor 10. If I does not satisfy Imin ≦ I ≦ Imax, then there may be another failure.
The invention also discloses a protection method for the safe operation of the compressor 10, and the protection method for the safe operation of the compressor 10 in the embodiment of the invention can be realized by using the protection system of the refrigeration equipment in the embodiment.
As shown in fig. 4 to 6, the protection method for safe operation of the compressor 10 according to the embodiment of the present invention includes the steps of: setting preset parameters for safe operation of the refrigeration equipment; measuring real-time data of the refrigeration equipment in an operating state; and comparing the real-time data or a calculated value calculated according to the real-time data with a preset parameter, and outputting a control instruction according to a comparison result, wherein the control instruction comprises controlling the compressor 10 to be powered off.
In some embodiments, the step of comparing the real-time data or the calculated value calculated from the real-time data with the preset parameter and outputting the control command according to the comparison result includes: when Tc > Tcmax, the control module 300 controls the compressor 10 to be powered off. It is understood that when Tc > Tcmax, it is determined that there is an internal high temperature risk in the compressor 10, the control module 300 controls the alarm 410 to send an alarm signal and controls the switch 420 to cut off the power supply to the compressor 10.
In other embodiments, the preset parameters include a preset upper limit value Tcmax of a shell temperature of the compressor 10, a preset lower limit value Dvmin of a difference between an inlet temperature of the condenser 20 and the shell temperature of the compressor 10, a preset lower limit value Imin of an operating current of the compressor 10, and a preset upper limit value Imax of the operating current of the compressor 10, the real-time data includes a shell temperature Tc of the compressor 10 and an inlet temperature Td of the condenser 20, the calculated value calculated from the real-time data includes Dv, which is Td-Tc, the step of comparing the real-time data or the calculated value calculated from the real-time data with the preset parameters, and outputting the control command according to the comparison result includes: when Tc is more than Tcmax, Dv is less than or equal to Dvmin, and Imin is less than or equal to I and less than or equal to Imax, the control module 300 controls the compressor 10 to be powered off. It is understood that when the above conditions are simultaneously satisfied, it can be determined that there is a risk of high-pressure side blockage in the system, and the control module 300 controls the alarm 410 to send an alarm signal and controls the switch 420 to cut off the power supply to the compressor 10. If I does not satisfy Imin ≦ I ≦ Imax, then there may be another failure.
In still other embodiments, the step of comparing the real-time data or the calculated value calculated from the real-time data with the preset parameters and outputting the control command according to the comparison result includes: when Tc is more than Tcmax, Dv is less than or equal to Dvmin, Tcond is less than or equal to Tcondmax, Delta Tcond is less than or equal to Delta Tcondmin, and Imin is less than or equal to I and less than or equal to Imax, the control module 300 controls the compressor 10 to be powered off. It is understood that when the above conditions are simultaneously satisfied, it may be determined that there is a risk of high-temperature demagnetization or air operation in the compressor 10, and the control module 300 controls the alarm 410 to send an alarm signal and controls the switch 420 to cut off the power supply to the compressor 10. If I does not satisfy Imin ≦ I ≦ Imax, then there may be another failure.
In still other embodiments, referring to fig. 5, a protection method for safe operation of the compressor 10 according to an embodiment of the present invention includes the steps of:
s1: installing a protection system for safe operation of the compressor 10 in the refrigeration equipment, and writing preset parameters for safe operation; s2: measuring and collecting real-time working condition parameters and electric parameters of the refrigeration equipment in the running state; s3: calculating the working condition parameters and the electrical parameters according to specific logic; s4: and comparing, judging and outputting the working condition parameters, the electrical parameters and the calculation processing results with the preset parameters.
Referring to fig. 6, the protection method for safe operation of the compressor 10 according to the embodiment of the present invention includes the steps of:
s101: installing a protection system for safe operation of the compressor 10 in the refrigeration equipment;
s102: presetting a shell temperature upper limit value Tcmax, a condensing temperature lower limit value delta Tcondmin of change rate in unit time, a difference lower limit value Dvmin between the inlet temperature of the condenser 20 and the shell temperature of the compressor 10, a normal working current upper limit Imax of the compressor 10, a normal working current lower limit Imin of the compressor 10 and a condensing temperature upper limit value Tcondmax in a control module 300; s103: measuring and collecting a shell temperature Tc, an inlet temperature Td of a condenser 20, a condensing temperature Tcond of the refrigeration equipment and a working current I of a compressor 10 in the running state of the refrigeration equipment; s104: calculating a change rate Δ Tcond per unit time of a condensation temperature and a difference Dv between an inlet temperature of the condenser 20 and a shell temperature of the compressor 10; s105: comparing the following parameters, if Tc is more than Tcmax, judging that the compressor 10 has internal high-temperature risk, and outputting an alarm signal and a switch 420 to control action; s106: comparing the following parameters, if Tc is more than Tcmax, Dv is less than or equal to Dvmin, and Imin is less than or equal to I and less than or equal to Imax, judging that the system has the risk of high-voltage side blockage, and outputting an alarm signal and controlling the action of the switch 420; s107: comparing the following parameters, if Tc is more than Tcmax, Dv is less than or equal to Dvmin, Tcond is less than or equal to Tcondmax, Delta Tcond is less than or equal to Delta Tcondmin, and Imin is less than or equal to I and less than or equal to Imax, judging that the compressor 10 has the risk of high-temperature demagnetization or air operation, and outputting an alarm signal and controlling the action of the switch 420.
In summary, according to the protection method for safe operation of the compressor 10 provided by the present invention, after the operating condition parameters and the electrical parameters of the refrigeration equipment are measured and collected, the operating condition parameters and the electrical parameters are subjected to specific logic calculation, and then compared with the preset parameters, and judged, and finally the alarm signal is output and the power supply 430 controls the operation, so as to prevent the compressor 10 from high temperature demagnetization and air operation explosion. The method has clear logic, high universality and strong pertinence, and can not conflict with the control logic of the conventional common refrigeration equipment.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. A protection system of a refrigeration apparatus, a refrigeration cycle of the refrigeration apparatus including a compressor, a condenser, a throttle unit, and an evaporator, characterized in that the protection system comprises:
a measurement module for measuring real-time data of the refrigeration cycle; the measurement module includes:
a condition parameter measuring means for measuring a shell temperature Tc of the compressor, an inlet temperature Td of the condenser, and a condensing temperature Tcond of the condenser;
an electrical parameter measuring means for measuring an operating current I of the compressor;
the data acquisition module is electrically connected with the measurement module and is used for acquiring real-time data measured by the measurement module;
the control module is electrically connected with the data acquisition module and the compressor; wherein the content of the first and second substances,
the control module is configured to control the compressor to be powered on or powered off according to real-time data acquired by the data acquisition module, and is configured to control the compressor to be powered off when Tc is greater than Tcmax, Dv is less than or equal to Dvmin, and Imin is less than or equal to I and less than or equal to Imax, wherein Tcmax is a preset upper limit value of the shell temperature of the compressor, Dv is Td-Tc, Dvmin is a preset lower limit value of a difference between the inlet temperature of the condenser and the shell temperature of the compressor, Imin is a preset lower limit value of the working current of the compressor, and Imax is a preset upper limit value of the working current of the compressor.
2. The protective system of a refrigeration appliance according to claim 1, wherein the operating parameter measuring component comprises:
a first temperature measurer for detecting a shell temperature Tc of the compressor;
a second temperature measurer for measuring an inlet temperature Td of the condenser;
and the third temperature measurer is used for measuring the condensation temperature Tcond of the condenser.
3. A protection system of a refrigeration apparatus, a refrigeration cycle of the refrigeration apparatus including a compressor, a condenser, a throttle unit, and an evaporator, characterized in that the protection system comprises:
a measurement module for measuring real-time data of the refrigeration cycle; the measurement module includes:
a condition parameter measuring means for measuring a shell temperature Tc of the compressor, an inlet temperature Td of the condenser, and a condensing temperature Tcond of the condenser;
an electrical parameter measuring means for measuring an operating current I of the compressor; the data acquisition module is electrically connected with the measurement module and is used for acquiring real-time data measured by the measurement module;
the control module is electrically connected with the data acquisition module and the compressor; the control module is configured to control the compressor to be powered on or powered off according to real-time data acquired by the data acquisition module, and the control module is configured to control the compressor to be powered off when Tc is greater than Tcmax, Dv is less than or equal to Dvmin, Tcond is less than or equal to Tcondmax, Delta Tcond is less than or equal to Delta Tcondmin, and Imin is less than or equal to Imax, wherein Tcmax is a preset upper limit value of the shell temperature of the compressor, Dv is Td-Tc, Dvmin is a preset lower limit value of a difference between the inlet temperature of the condenser and the shell temperature of the compressor, Imin is a preset lower limit value of the working current of the compressor, Imax is a preset upper limit value of the working current of the compressor, Tcondmax is a preset upper limit value of the condensing temperature of the condenser, Delta Tcond is the change rate of the condensing temperature, and Delta Tcondmin is a preset lower limit value of the change rate of the condensing temperature.
4. The protective system of a refrigeration appliance according to any one of claims 1 to 3, wherein the control module comprises: the device comprises a calculation unit, a register unit, a comparison unit and an output unit; wherein the content of the first and second substances,
the register unit is electrically connected with the output unit, the calculation unit and the comparison unit, the calculation unit is electrically connected with the comparison unit, and the output unit is electrically connected with the comparison unit;
the computing unit is used for computing a computing result according to the real-time data and a preset computing program;
the registering unit is used for registering preset parameters, the real-time data, the calculation result and the comparison result of the comparison unit;
the comparison unit is used for comparing the preset parameters, the real-time data and the calculation result to obtain a comparison result;
the output unit is suitable for being electrically connected with the compressor or a switch of the refrigeration equipment and used for controlling the power-on or power-off of the compressor according to the comparison result.
5. A shield system for a refrigeration appliance according to any one of claims 1 to 3, further comprising: and the alarm is electrically connected with the control module.
6. A protection method for safe operation of a compressor, comprising the steps of:
setting preset parameters for safe operation of the refrigeration equipment;
measuring real-time data of the refrigeration equipment in the running state;
comparing the real-time data or a calculated value calculated from the real-time data with the preset parameters, and outputting a control instruction according to the comparison result, wherein the control instruction comprises the power-off control of the compressor, the preset parameters comprise a preset upper limit value Tcmax of the shell temperature of the compressor, a preset difference lower limit value Dvmin of the inlet temperature of the condenser and the shell temperature of the compressor, a preset lower limit value Imin of the working current of the compressor and a preset upper limit value Imax of the working current of the compressor, the real-time data comprises a shell temperature Tc of the compressor and an inlet temperature Td of the condenser, the calculated value calculated from the real-time data comprises Dv, Dv-Td-Tc, the step of comparing the real-time data or a calculated value calculated according to the real-time data with the preset parameter and outputting a control instruction according to a comparison result includes:
and when Tc is more than Tcmax, Dv is less than or equal to Dvmin, and Imin is less than or equal to I and less than or equal to Imax, controlling the compressor to be powered off.
7. A protection method for safe operation of a compressor, comprising the steps of:
setting preset parameters for safe operation of the refrigeration equipment;
measuring real-time data of the refrigeration equipment in the running state;
comparing the real-time data or a calculated value calculated according to the real-time data with the preset parameter, and outputting a control instruction according to a comparison result, wherein the control instruction comprises controlling the power failure of a compressor, the preset parameter comprises a preset upper limit value Tcmax of the shell temperature of the compressor, a preset lower limit value Dvmin of a difference value between the inlet temperature of a condenser and the shell temperature of the compressor, a preset lower limit value Imin of the working current of the compressor, a preset upper limit value Imax of the working current of the compressor, a preset upper limit value Tcondmax of the condensing temperature of the condenser, and a preset lower limit value Delta Tcondmin of a change rate of the condensing temperature, the real-time data comprises the shell temperature Tc of the compressor and the inlet temperature Td of the condenser, the calculated value comprises Dv and the change rate Delta Tcond of the condensing temperature, and the Dv is Td-Tc, the step of comparing the real-time data or a calculated value calculated according to the real-time data with the preset parameter and outputting a control instruction according to a comparison result includes:
and when Tc is more than Tcmax, Dv is less than or equal to Dvmin, Tcond is less than or equal to Tcondmax, delta Tcond is less than or equal to delta Tcondmin, and Imin is less than or equal to I and less than or equal to Imax, controlling the compressor to be powered off.
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| CN201810292056.7A CN108662730B (en) | 2018-03-30 | 2018-03-30 | Protection system for refrigeration equipment and protection method for safe operation of compressor |
| PCT/CN2018/112622 WO2019184332A1 (en) | 2018-03-30 | 2018-10-30 | Protection system of refrigeration device and protection method for safe operation of compressor |
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| CN201810292056.7A CN108662730B (en) | 2018-03-30 | 2018-03-30 | Protection system for refrigeration equipment and protection method for safe operation of compressor |
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| CN108662730B (en) * | 2018-03-30 | 2021-02-12 | 广东美芝制冷设备有限公司 | Protection system for refrigeration equipment and protection method for safe operation of compressor |
| CN110594953A (en) * | 2019-09-09 | 2019-12-20 | 广东美的暖通设备有限公司 | Compressor driving device, compressor pressure protection method and air conditioner |
| CN111780380A (en) * | 2020-06-15 | 2020-10-16 | 珠海格力电器股份有限公司 | Method and device for controlling running state of compressor |
| CN112229126A (en) * | 2020-10-22 | 2021-01-15 | 青岛德而酷电器有限公司 | Absorption refrigerator refrigerating system damage pre-judging method and device |
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| JP2004301039A (en) * | 2003-03-31 | 2004-10-28 | Mitsubishi Electric Corp | Compressor protecting device and compressor using the same |
| JP5235390B2 (en) * | 2007-11-27 | 2013-07-10 | 三菱電機株式会社 | Inverter control device and air conditioner |
| CN102345915B (en) * | 2011-08-02 | 2013-11-27 | 宁波奥克斯电气有限公司 | Fault operation control method of DC (direct current) convertible frequency air conditioner |
| CN102761103B (en) * | 2012-02-24 | 2013-05-29 | 珠海格力电器股份有限公司 | Compressor demagnetization protection circuit and demagnetization protection method and air conditioner |
| CN103944143B (en) * | 2014-04-02 | 2017-06-06 | 美的集团股份有限公司 | A kind of air-conditioner and its compressor demagnetization protection circuit and method |
| CN104613690B (en) * | 2014-12-16 | 2017-02-01 | 广东美的制冷设备有限公司 | Control method and control system for condenser temperature protection |
| CN106839276A (en) * | 2017-01-03 | 2017-06-13 | 青岛海尔空调器有限总公司 | The control method and air-conditioning of a kind of lack of fluorine of air-conditioners detection |
| CN107039950A (en) * | 2017-03-27 | 2017-08-11 | 珠海凌达压缩机有限公司 | The method of compressor protection system, air conditioner and compressor protection system control |
| CN107359594A (en) * | 2017-07-03 | 2017-11-17 | 广东美芝制冷设备有限公司 | Compressor power-off demagnetization guard method, device, household electrical appliance and storage medium |
| CN108662730B (en) * | 2018-03-30 | 2021-02-12 | 广东美芝制冷设备有限公司 | Protection system for refrigeration equipment and protection method for safe operation of compressor |
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