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CN-122015268-A - Air conditioner

CN122015268ACN 122015268 ACN122015268 ACN 122015268ACN-122015268-A

Abstract

The invention discloses an air conditioner, which comprises a controller, at least one control item detection unit, at least one driving piece, at least one controller, a current difference value, a history difference value and a control piece, wherein the controller is preset with at least one control item and is provided with a first target value, the control item detection unit is connected with the controller and is used for detecting real-time parameters of the control item in real time and transmitting the real-time parameters to the controller, the driving piece is a variable-frequency compressor and/or an expansion valve and is connected with the controller, the driving piece is controlled by the controller to change the driving parameters of the variable-frequency compressor and/or the expansion valve so that the real-time parameters of the control item are increased or decreased, the controller is configured to circularly acquire and store the real-time parameters, the current difference value is the difference value between the first target value and the real-time parameters, the history difference value is the difference value between the real-time parameters and the history parameters, the history parameters are acquired from the real-time parameters before the current real-time parameters, and the driving piece is controlled according to the current difference value and the history difference value. Through predictive control, overshoot is reduced, and comfort is improved.

Inventors

  • YUE YUANLONG
  • WANG RUIJIA
  • LIN WENTAO

Assignees

  • 青岛海信日立空调系统有限公司

Dates

Publication Date
20260512
Application Date
20241112

Claims (10)

  1. 1. An air conditioner, comprising: At least one driving member which is a variable frequency compressor and/or expansion valve; The driving piece is connected with the controller, and the controller controls and changes the driving parameters of the driving piece so as to increase or decrease the real-time parameters of the control items; the control item detection unit is connected with the controller and used for detecting real-time parameters of the control items in real time and transmitting the real-time parameters to the controller; The controller is configured to: circularly acquiring the real-time parameters and storing the real-time parameters; The method comprises the steps of obtaining a current difference value which is a difference value between a first target value and a real-time parameter, obtaining a historical difference value which is a difference value between the real-time parameter and a historical parameter, wherein the historical parameter is obtained from each real-time parameter before the current real-time parameter; and controlling the driving piece according to the current difference value and the historical difference value.
  2. 2. The air conditioner of claim 1, wherein the controller is preset with a first correction coefficient and a second correction coefficient; the controller is further configured to: The sum of the differences is equal to the product of the first correction coefficient and the current difference plus the product of the second correction coefficient and the historical difference; If the difference sum is a negative value, changing the change trend of the real-time parameter of the control item according to the difference sum and changing the driving parameter; if the sum of the differences is zero, controlling the driving piece to maintain the operation of the driving parameters, and prohibiting the driving parameters from being changed; and if the sum of the differences is positive, controlling the driving piece to operate in a normal mode, wherein the predictive control is not executed when the driving piece is operated in the normal mode.
  3. 3. The air conditioner according to claim 2, wherein the controller is configured to: The first target value is a high-point threshold value, the current difference value is equal to the first target value minus the real-time parameter, and the historical difference value is equal to the historical parameter minus the real-time parameter.
  4. 4. The air conditioner according to claim 2, wherein the controller is configured to: The first target value is a low-point threshold value, the current difference value is equal to the current real-time parameter minus the first target value, and the historical difference value is equal to the current real-time parameter minus the historical parameter.
  5. 5. An air conditioner according to claim 2 or 3, wherein the controller is preset with an acquisition period, which is a period in which the real-time parameters are acquired cyclically; The historical parameters are the real-time parameters with the duration of at least one acquisition period from the current real-time parameters, and the number of the acquisition periods from the current real-time parameters is determined according to the stored change trend of each real-time parameter.
  6. 6. The air conditioner according to any one of claims 2 to 4, wherein the controller is preset with a gain constant and configured to: When the difference sum is a negative value, the controller controls the driving parameter to change an absolute value of a quotient of the difference sum divided by the gain constant.
  7. 7. The air conditioner according to any one of claims 2 to 4, wherein the controller is preset with a gain constant and configured to: When the difference sum is a negative value, the controller controls the driving parameter to change an absolute value integer of a quotient of the difference sum divided by the gain constant.
  8. 8. The air conditioner of claim 7, wherein a fractional portion of the difference sum divided by the gain constant is added to the difference sum of the next cycle.
  9. 9. The air conditioner of claim 8, wherein the controller is preset with a second target value, a third target value, a first return difference, a second return difference, an adjustment value, and is configured to: controlling the driving parameter to change the adjustment value or the absolute value integer of the quotient of the difference value and the gain constant when the real-time parameter reaches or exceeds the second target value; When the sum of the differences is a positive value, the real-time parameter is located between the first return difference value and the third target value of the second target value, the driving piece is controlled to maintain the driving parameter to operate, and the change is forbidden, the second return difference value of the real-time parameter lower than the third target value is controlled to operate in the normal mode, and the real-time parameter is located between the first return difference value of the second target value and the second target value or between the second return difference value of the third target value and the third target value, and the driving piece is controlled to maintain the original operating state.
  10. 10. The air conditioner as claimed in claim 9, wherein the driving part is the compressor, which is connected to the controller, and is controlled to operate by the controller; the controller is preset with a fourth target value, the first target value is equal to the second target value, and is configured to: And if the real-time parameter reaches or exceeds the fourth target value, controlling the compressor to stop.

Description

Air conditioner Technical Field The invention relates to the technical field of air conditioning, in particular to an air conditioner. Background The air conditioner includes refrigerant circulating system and electric control system, the refrigerant circulating system includes system pipeline, compressor, etc. and has normal operation in certain temperature range and pressure range, and the electric control system includes electric control board, etc. and has normal operation in certain temperature range, voltage range and current range. If the exhaust temperature of the compressor is smaller than the requirement on the exhaust temperature in the specification of the compressor, the system can be operated under the condition that the high-pressure and the low-pressure of the system are required by the compressor, and the compressor current and the input current are required to be within the design range of the electric control board, so that the electric control board cannot be damaged. The system protection is a general term for the protective control of components such as a system pipeline, a compressor, an electric control board and the like. Current system protection is based on target control such as compressor down-conversion when the discharge temperature is above a target value, expansion valve increase or decrease, compressor down-conversion when the current reaches a target value, etc. The control method can protect the system pipeline, the compressor, the electric control board and the like from being damaged in operation, but can lead to larger parameter overshoot, thereby leading to large system fluctuation and even leading to parameter overrun and shutdown caused by untimely protection action, and further affecting the stability and the use comfort of the system. The above information disclosed in this background section is only for enhancement of understanding of the background section of the application and therefore it may not form the prior art that is already known to those of ordinary skill in the art. Disclosure of Invention Aiming at the problems that the target value control method for the air conditioning system parameters is easy to cause large system fluctuation, poor stability and influence on comfort in the background art, the invention provides the air conditioner, which reduces overshoot, reduces system fluctuation, improves the running stability and further improves the use comfort by predicting the control method of the running state. In order to achieve the aim of the invention, the invention is realized by adopting the following technical scheme: An air conditioner comprises at least one driving piece, a controller and at least one control item detection unit; The driving part is a variable-frequency compressor and/or an expansion valve, The driving piece is connected with the controller, and the controller controls and changes the driving parameters of the driving piece so as to increase or decrease the real-time parameters of the control items; The control item detection unit is connected with the controller and is used for detecting real-time parameters of the control item in real time and transmitting the real-time parameters to the controller; The controller is configured to: circularly acquiring the real-time parameters and storing the real-time parameters; The method comprises the steps of obtaining a current difference value which is a difference value between a first target value and a real-time parameter, obtaining a historical difference value which is a difference value between the real-time parameter and a historical parameter, wherein the historical parameter is obtained from each real-time parameter before the current real-time parameter; and controlling the driving piece according to the current difference value and the historical difference value. The air conditioner circularly acquires the real-time parameters of the control items, stores the real-time parameters, acquires the current difference value, is used for identifying the difference between the current real-time parameters and the first target value, acquires the historical difference value, is used for identifying the change amplitude of the real-time parameters, predicts the change direction and the change speed of the real-time parameters according to the current difference value and the historical difference value, further controls the driving piece to operate according to the prediction condition, enables the driving piece to reach the first target value as soon as possible, gradually slows down the approach speed in the process of approaching the first target value, prevents overshoot, improves the stability and the reliability of the control items, reduces the system fluctuation, further improves the stability and the reliability of the operation of the air conditioner, reduces the outage rate and improves the comfort. In some specific embodiments, the controller is preset with a first corr