CN-121993850-A - Air conditioner

CN121993850ACN 121993850 ACN121993850 ACN 121993850ACN-121993850-A

Abstract

The invention discloses an air conditioner, which is characterized in that the air conditioner presets the maximum operating frequency, trial operation is carried out when the first operation is completed, the piping parameters of the air conditioner are determined in the trial operation process, the actual maximum operating frequency of a compressor reaching the air conditioner capacity is determined according to the piping parameters and the preset maximum operating frequency, the actual maximum operating frequency is written into a storage module, the actual maximum operating frequency is used as the upper limit operating frequency of the compressor, the actual maximum operating frequency of the compressor is the frequency which can reach the nominal air conditioner capacity when being adapted to the piping parameters of the air conditioner after the actual installation, and the problem that the air conditioner capacity is attenuated due to pressure loss caused by factors such as piping length, height difference and the like and cannot reach the nominal air conditioner capacity in the preset maximum operating frequency range is avoided.

Inventors

LIU XINYI
XIN DIANBO
GAO YONGKUN
GUO XIAOHUI
GAO YU
GUO GUANMING
JING XU

Assignees

青岛海信日立空调系统有限公司

Dates

Publication Date: 20260508
Application Date: 20241104

Claims (10)

1. An air conditioner, comprising: A compressor; The storage module is used for storing the preset maximum operating frequency of the compressor corresponding to the number of air conditioners, and is characterized in that the preset maximum operating frequency of the compressor is used as the upper limit frequency of the compressor, And the controller is configured to control the air conditioner to perform trial operation when the air conditioner is installed for the first time, determine the piping parameters of the air conditioner, determine the actual maximum operating frequency of the compressors reaching the number of air conditioners according to the piping parameters and the preset maximum operating frequency, write the actual maximum operating frequency into the storage module, and take the actual maximum operating frequency as the upper limit operating frequency of the compressors.
2. An air conditioner according to claim 1, wherein, The storage module stores a plurality of tubing parameters or maximum frequency correction values corresponding to tubing parameter intervals; The controller is configured to determine a maximum frequency correction value according to the tubing parameter, and correct the preset maximum operating frequency through the maximum frequency correction value to obtain an actual maximum operating frequency; or the storage module stores the corresponding relation between the actual maximum operating frequency and the tubing parameter and the preset maximum operating frequency; The controller is configured to obtain an actual maximum operating frequency according to the piping parameters and the correspondence.
3. An air conditioner according to claim 1, wherein, The storage module stores preset starting frequency of the compressor; The controller is configured to determine an actual starting frequency of the compressor according to the piping parameter and a preset starting frequency, and control the compressor to start according to the actual starting frequency.
4. An air conditioner according to claim 3, wherein, The storage module stores a plurality of tubing parameters or starting frequency correction values corresponding to tubing parameter intervals; the controller is configured to determine a starting frequency correction value according to the tubing parameter, and correct the preset starting frequency through the starting frequency correction value to obtain an actual starting frequency; or the storage module stores the corresponding relation between the actual starting frequency and the tubing parameter and the preset starting frequency; the controller is configured to obtain an actual start-up frequency according to the piping parameters and the correspondence.
5. An air conditioner according to claim 1, wherein the air conditioner comprises: An expansion valve; the storage module stores preset starting opening of the expansion valve; the controller is configured to determine the actual starting opening of the expansion valve according to the piping parameters and the preset starting opening, and control the expansion valve to start according to the actual starting opening.
6. The air conditioner according to claim 5, wherein, The storage module stores a plurality of distribution parameters or opening correction values corresponding to distribution parameter intervals; the controller is configured to determine an opening correction value according to the piping parameter, and correct the preset starting opening by the opening correction value to obtain an actual starting opening; Or the storage module stores the corresponding relation between the actual starting opening and the tubing parameter and the preset starting opening; the controller is configured to obtain an actual start-up opening according to the piping parameters and the correspondence.
7. An air conditioner according to any one of claims 1 to 6, wherein the controller is configured to maintain at least a set time during a commissioning process in which all indoor units are operated simultaneously and at a preset maximum operating frequency of the compressor.
8. The air conditioner of claim 7, wherein the controller is configured to acquire the operating parameters after a period of time from the start of the test run to determine the piping parameters of the air conditioner.
9. The air conditioner according to claim 6, wherein the commissioning process of the air conditioner is a cooling commissioning or a heating commissioning; In the cooling test operation, the air conditioner includes: The indoor unit liquid pipe temperature detection module is used for detecting the temperature of the indoor unit liquid pipe; The suction pressure detection module is used for detecting suction pressure; the controller is configured to calculate the evaporating pressure according to the temperature of the liquid pipe of the indoor unit, and the refrigerating piping parameters are as follows: (evaporation pressure-suction pressure)/turbulent pressure drop; or (evaporation pressure-suction pressure)/(preset maximum frequency 2 x suction side refrigerant density); Or (evaporation pressure-suction pressure) ×evaporation pressure/preset maximum frequency 2 ; Or (evaporation pressure-suction pressure) suction pressure/preset maximum frequency 2 ; Or (evaporation pressure-suction pressure) × (evaporation pressure + suction pressure)/preset maximum frequency 2 ; in the heating test operation, the air conditioner includes: the indoor unit coil temperature detection module is used for detecting the temperature of the indoor unit coil; The suction pressure detection module is used for detecting suction pressure; An exhaust pressure detection module for detecting an exhaust pressure; the controller is configured to calculate condensing pressure according to the temperature of the coil pipe of the indoor unit, and the heating piping parameters are as follows: (discharge pressure-condensing pressure)/turbulent pressure drop; Or (discharge pressure-condensing pressure)/(preset maximum frequency 2 x suction side refrigerant density 2 /discharge side refrigerant density); or (discharge pressure-condensing pressure) ×suction pressure 2 /(preset maximum frequency 2 ×discharge pressure); or (discharge pressure-condensing pressure) suction pressure 2 /(preset maximum frequency 2 condensing pressure); or (discharge pressure-condensing pressure) ×suction pressure 2 /(preset maximum frequency 2 x (condensing pressure+discharge pressure)).
10. The air conditioner of claim 9, wherein the controller is configured to control the air conditioner heating test run to obtain a heating piping parameter when receiving the heating mode control signal, and to determine an actual maximum frequency based on the heating piping parameter; Or the controller is configured to control the air conditioner to be turned on when receiving the turn-on control signal.

Description

Air conditioner Technical Field The invention relates to the technical field of air conditioning systems, in particular to an air conditioner capable of adapting to different piping lengths. Background The number of air conditioners at the time of shipment is already determined, that is, the maximum operating frequency of the compressor, which is designed when the piping length is the standard length, is determined, and the compressor can only be operated below the maximum operating frequency. However, the air conditioner has a large difference in pipe length due to a difference in installation scene. Particularly, in the multi-split air conditioner heat pump unit, the outdoor unit has large capacity, so that the condition of overlong on-line piping of the indoor unit and the outdoor unit is often encountered. More severely, in the installation scene of a high-rise building or a market, a certain height difference exists between the outdoor unit and the indoor unit, between the indoor unit and between the outdoor unit and the outdoor unit. The refrigerant pressure loss is overlarge due to the length and the height difference of the piping, so that the refrigerant pressure of an air suction port of the compressor is reduced, the density is reduced, the mass flow of the refrigerant of the system is reduced under the condition of the same frequency, the refrigerating (heating) quantity of the system is reduced, the capacity of a unit is attenuated, and the capacity of the unit when the unit operates at the maximum frequency cannot reach the nominal number of the air conditioner. 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 The invention provides an air conditioner, which solves the technical problem that the capacity of the existing air conditioner is attenuated due to different pressure losses formed by the installation environment, and the capacity of the air conditioner when the air conditioner operates at the maximum frequency cannot reach the nominal matching number of the air conditioner. In order to achieve the aim of the invention, the invention is realized by adopting the following technical scheme: an air conditioner, comprising: A compressor; The storage module is used for storing the preset maximum operating frequency of the compressor corresponding to the number of air conditioners, and is characterized in that the preset maximum operating frequency of the compressor is used as the upper limit frequency of the compressor, And the controller is configured to control the air conditioner to perform trial operation when the air conditioner is installed for the first time, determine the piping parameters of the air conditioner, determine the actual maximum operating frequency of the compressors reaching the number of air conditioners according to the piping parameters and the preset maximum operating frequency, write the actual maximum operating frequency into the storage module, and take the actual maximum operating frequency as the upper limit operating frequency of the compressors. The air conditioner has the advantages that the air conditioner performs trial operation when the air conditioner is installed for the first time, the tubing parameter of the air conditioner is determined in the trial operation process, the actual maximum operation frequency of the compressor reaching the air conditioner number is determined according to the tubing parameter and the preset maximum operation frequency, the actual maximum operation frequency is written into the storage module, the actual maximum operation frequency is used as the upper limit operation frequency of the compressor, the actual maximum frequency of the compressor is the frequency which can reach the nominal air conditioner number when being adapted to the tubing parameter after the air conditioner is actually installed, the problem that the air conditioner capacity is attenuated due to pressure loss caused by factors such as tubing length, height difference and the like is avoided, and the nominal number cannot be reached within the preset maximum operation frequency range. In some embodiments, the storage module stores a plurality of piping parameters or maximum frequency correction values corresponding to the piping parameter intervals; The controller is configured to determine a maximum frequency correction value according to the tubing parameter, and correct the preset maximum operating frequency through the maximum frequency correction value to obtain an actual maximum operating frequency; or the storage module stores the corresponding relation between the actual maximum operating frequency and the tubing parameter and the preset maximum operating frequency; The controller is configured to obtain an actual maximum