Control method, apparatus, and device for compressor, storage medium, and refrigeration system

Abstract

The present disclosure provides a control method, apparatus, and device for a compressor, a storage medium, and a refrigerator system. The control method includes: obtaining an electrical parameter, a return air parameter, and a first frequency of the compressor during operation of the compressor; determining a first fitting formula corresponding to the first frequency; obtaining an exhaust pressure by inputting the electrical parameter and the return air parameter into the first fitting formula for calculation; and controlling the compressor based on the exhaust pressure. In this way, the pressure sensor disposed on an exhaust side of an air conditioner can be omitted, hence cost is saved; or for the air conditioner with the pressure sensor on the exhaust side, the above manner for calculation can be an alternative to obtaining the exhaust pressure, which ensures a user's normal use and thus improves the user experience.

1 . A control method for a compressor, comprising:
 obtaining an electrical parameter, a return air parameter, and a first frequency of the compressor during operation of the compressor;   determining a first fitting formula corresponding to the first frequency from a preset calculation model, wherein the preset calculation model comprises fitting formulas corresponding to a plurality of frequencies, and wherein each of the fitting formulas is obtained by fitting based on a historical electrical parameter, a historical return air parameter and a historical frequency of the compressor;   obtaining an exhaust pressure by inputting the electrical parameter and the return air parameter into the first fitting formula for calculation; and   controlling the compressor based on the exhaust pressure.   
     
     
         2 . The method according to  claim 1 , wherein:
 the return air parameter comprises a return air pressure; and   the first fitting formula comprises a pressure fitting formula, the pressure fitting formula comprising:
     Pc=A   1   +A   2   *Pe+A   3   *X+A   4   *Pe   2   +A   5   *Pe*X+A   6   *X   2 ; or 
     Pc=A   1   +A   2   *Pe+A   3   *X+A   4   *Pe   2   +A   5   *Pe*X+A   6   *X   2   +A   7   *Pe   3   +A   8   *Pe   2   *X+A   9   *Pe*X   2   +A   10   *X   3 , 
   where Pc represents the exhaust pressure of the compressor, Pe represents the return air pressure of the compressor, X represents the electrical parameter of the compressor, and A 1  to A 10  represent coefficients of the pressure fitting formula.   
     
     
         3 . The method according to  claim 2 , further comprising, prior to the operation of determining the first fitting formula corresponding to the first frequency from the preset calculation model:
 determining whether the preset calculation model comprises the pressure fitting formula corresponding to the first frequency; and   determining, in response to determining that the preset calculation model comprises no pressure fitting formula corresponding to the first frequency, the exhaust pressure of the compressor by means of interpolation calculation.   
     
     
         4 . The method according to  claim 3 , wherein said determining the exhaust pressure of the compressor by means of the interpolation calculation comprises:
 obtaining a second pressure fitting formula corresponding to a second frequency and a third pressure fitting formula corresponding to a third frequency from the preset calculation model, the second frequency being a frequency closest to the first frequency of frequencies that correspond to pressure fitting formulas and are greater than the first frequency, and the third frequency being a frequency closest to the first frequency of frequencies that correspond to the pressure fitting formulas and are smaller than the first frequency;   obtaining a second exhaust pressure and a third exhaust pressure by substituting the obtained electrical parameter and return air pressure of the compressor into each of the second pressure fitting formula and the third pressure fitting formula; and   determining the exhaust pressure of the compressor based on the second exhaust pressure and the third exhaust pressure.   
     
     
         5 . The method according to  claim 1 , wherein:
 the return air parameter comprises a corresponding return air saturation temperature that is obtained based on a return air pressure during the operation of the compressor; and   the first fitting formula comprises a temperature fitting formula, the temperature fitting formula comprising:
     Tc=B   1   +B   2   *Te+B   3   *X+B   4   *Te   2   +B   5   *Te*X+B   6   *X   2 ; or 
     Tc=B   1   +B   2   *Te+B   3   *X+B   4   *Te   2   +B   5   *Te*X+B   6   *X   2   +B   7   *Te   3   +B   8   *Te   2   *X+B   9   *Te*X   2   +B   10   *X   3 , 
   where Tc represents an exhaust air saturation temperature of the compressor, Tc represents the return air saturation temperature of the compressor, X represents the electrical parameter of the compressor, and B 1  to B 10  represent coefficients of the temperature fitting formula; and   said obtaining the exhaust pressure by inputting the electrical parameter and the return air parameter into the first fitting formula for calculation comprises: obtaining the exhaust air saturation temperature by inputting the electrical parameter and the return air saturation temperature into the temperature fitting formula, and determining the exhaust pressure based on the obtained exhaust air saturation temperature.   
     
     
         6 . The method according to  claim 5 , wherein said determining the exhaust pressure based on the obtained exhaust air saturation temperature comprises:
 determining an exhaust pressure corresponding to the obtained exhaust air saturation temperature based on a pre-stored correspondence table between the pressure and the saturation temperature.   
     
     
         7 . The method according to  claim 1 , further comprising, subsequent to said obtaining the exhaust pressure by inputting the electrical parameter and the return air parameter into the first fitting formula for calculation:
 obtaining a temperature of a heat exchanger in a refrigeration system where the compressor is located, and obtaining a pressure of the heat exchanger based on the temperature of the heat exchanger;   obtaining pipeline pressure loss; and   determining a greater one between a sum of the pressure of the heat exchanger and the pipeline pressure loss and the obtained exhaust pressure as an ultimate exhaust pressure.   
     
     
         8 . The method according to  claim 1 , wherein the electrical parameter comprises a power or a current. 
     
     
         9 . (canceled) 
     
     
         10 . A control device for a compressor, the control device comprising:
 a memory having computer-readable instructions stored thereon;   a processor; and   a communication bus configured to implement connection communication between the memory and the processor, wherein the computer-readable instructions, when executed by the processor, cause the processor:   obtain an electrical parameter, a return air parameter, and a first frequency of the compressor during operation of the compressor;   determine a first fitting formula corresponding to the first frequency from a preset calculation model, wherein the preset calculation model comprises fitting formulas corresponding to a plurality of frequencies, and wherein each of the fitting formulas is obtained by fitting based on a historical electrical parameter, a historical return air parameter and a historical frequency of the compressor;   obtain an exhaust pressure by inputting the electrical parameter and the return air parameter into the first fitting formula for calculation; and   control the compressor based on the exhaust pressure.   
     
     
         11 . A computer-readable storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processing device, performs the steps of the control method for the compressor according to  claim 1 . 
     
     
         12 . A refrigeration system, comprising:
 a compressor; and   the control device for the compressor according to  claim 10 , wherein the control device is configured to control the compressor.   
     
     
         13 . The refrigeration system according to  claim 12 , further comprising:
 a pressure sensor configured to detect a return air pressure, the return air parameter comprising the return air pressure or a corresponding return air saturation temperature that is obtained based on the return air pressure.   
     
     
         14 . The refrigeration system according to  claim 12 , further comprising:
 a heat exchanger; and   a temperature sensor configured to detect a temperature of the heat exchanger, wherein   a pressure of the heat exchanger is obtained based on the temperature of the heat exchanger;   pipeline pressure loss is obtained; and   a greater one between a sum of the pressure of the heat exchanger and the pipeline pressure loss and the obtained exhaust pressure is determined as an ultimate exhaust pressure.   
     
     
         15 . The refrigeration system according to  claim 12 , further comprising: an air conditioner. 
     
     
         16 . The control device according to  claim 10 , wherein:
 the return air parameter comprises a return air pressure; and   the first fitting formula comprises a pressure fitting formula, the pressure fitting formula comprising:
     Pc=A   1   +A   2   *Pe+A   3   *X+A   4   *Pe   2   +A   5   *Pe*X+A   6   *X   2 ; or 
     Pc=A   1   +A   2   *Pe+A   3   *X+A   4   *Pe   2   +A   5   *Pe*X+A   6   *X   2   +A   7   *Pe   3   +A   8   *Pe   2   *X+A   9   *Pe*X   2   +A   10   *X   3 , 
   where Pc represents the exhaust pressure of the compressor, Pe represents the return air pressure of the compressor, X represents the electrical parameter of the compressor, and A 1  to A 10  represent coefficients of the pressure fitting formula.   
     
     
         17 . The control device according to  claim 16 , wherein the computer-readable instructions, when executed by the processor, cause the processor further to, prior to the operation of determining the first fitting formula corresponding to the first frequency from the preset calculation model:
 determine whether the preset calculation model comprises the pressure fitting formula corresponding to the first frequency; and   determine, in response to determining that the preset calculation model comprises no pressure fitting formula corresponding to the first frequency, the exhaust pressure of the compressor by means of interpolation calculation.   
     
     
         18 . The control device according to  claim 17 , wherein said determining the exhaust pressure of the compressor by means of the interpolation calculation comprises:
 obtaining a second pressure fitting formula corresponding to a second frequency and a third pressure fitting formula corresponding to a third frequency from the preset calculation model, the second frequency being a frequency closest to the first frequency of frequencies that correspond to the pressure fitting formulas and are greater than the first frequency, and the third frequency being a frequency closest to the first frequency of frequencies that correspond to the pressure fitting formulas and are smaller than the first frequency;   obtaining a second exhaust pressure and a third exhaust pressure by substituting the obtained electrical parameter and return air pressure of the compressor into each of the second pressure fitting formula and the third pressure fitting formula; and   determining the exhaust pressure of the compressor based on the second exhaust pressure and the third exhaust pressure.   
     
     
         19 . The control device according to  claim 10 , wherein:
 the return air parameter comprises a corresponding return air saturation temperature that is obtained based on a return air pressure during the operation of the compressor; and   the first fitting formula comprises a temperature fitting formula, the temperature fitting formula comprising:
     Tc=B   1   +B   2   *Te+B   3   *X+B   4   *Te   2   +B   5   *Te*X+B   6   *X   2 ; or 
     Tc=B   1   +B   2   *Te+B   3   *X+B   4   *Te   2   +B   5   *Te*X+B   6   *X   2   +B   7   *Te   3   +B   8   *Te   2   *X+B   9   *Te*X   2   +B   10   *X   3 , 
   where Tc represents an exhaust air saturation temperature of the compressor, Tc represents the return air saturation temperature of the compressor, X represents the electrical parameter of the compressor, and B 1  to B 10  represent coefficients of the temperature fitting formula; and   said obtaining the exhaust pressure by inputting the electrical parameter and the return air parameter into the first fitting formula for calculation comprises: obtaining the exhaust air saturation temperature by inputting the electrical parameter and the return air saturation temperature into the temperature fitting formula, and determining the exhaust pressure based on the obtained exhaust air saturation temperature.   
     
     
         20 . The control device according to  claim 19 , wherein said determining the exhaust pressure based on the obtained exhaust air saturation temperature comprises:
 determining an exhaust pressure corresponding to the obtained exhaust air saturation temperature based on a pre-stored correspondence table between the pressure and the saturation temperature.   
     
     
         21 . The control device according to  claim 10 , wherein the computer-readable instructions, when executed by the processor, cause the processor further to, subsequent to said obtaining the exhaust pressure by inputting the electrical parameter and the return air parameter into the first fitting formula for calculation:
 obtain a temperature of a heat exchanger in a refrigeration system where the compressor is located, and obtain a pressure of the heat exchanger based on the temperature of the heat exchanger;   obtain pipeline pressure loss; and   determine a greater one between a sum of the pressure of the heat exchanger and the pipeline pressure loss and the obtained exhaust pressure as an ultimate exhaust pressure.