Air-conditioning internal machine control method and system, air conditioner and readable storage medium

An air conditioner internal unit and control method technology, applied to mechanical equipment and other directions, can solve problems such as repeated fluctuations in valve step adjustment, and achieve the effect of avoiding repeated fluctuations

Active Publication Date: 2020-06-12
NINGBO AUX ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The present invention designs an air conditioner internal unit control method, system, air conditioner and readable storage medium to solve the problem of repeated fluctuations in the valve step adjustment of the air conditioner internal unit near the inflection point of the flow curve

Method used

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  • Air-conditioning internal machine control method and system, air conditioner and readable storage medium
  • Air-conditioning internal machine control method and system, air conditioner and readable storage medium
  • Air-conditioning internal machine control method and system, air conditioner and readable storage medium

Examples

Experimental program
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Embodiment 1

[0049] This embodiment provides a control method for an air conditioner internal unit, using an air conditioner internal unit, such as figure 1As shown, it includes electronic expansion valve, evaporator, compressor and controller (not shown on the figure). The evaporator is equipped with a liquid pipe temperature sensing package and a gas pipe temperature sensing package for sensing the temperature at the outlet of the evaporator, and The temperature information is converted into pressure information and transmitted to the valve body to regulate the flow. The electronic expansion valve collects the superheat signal through the temperature sensor, and uses feedback adjustment to control the opening of the expansion valve to improve the system regulation quality and control the superheat within the target range in a wide evaporation temperature range. The calculation of the actual degree of superheat in the present invention is the difference between the temperature of the air...

Embodiment 2

[0065] Such as Figure 4 As shown, the air conditioner indoor unit control method provided in this embodiment is as follows:

[0066] S1: Detect whether the valve step of the expansion valve of the air conditioner internal unit fluctuates within the preset range, and if so, go to the next step.

[0067] This step is the same as in Example 1.

[0068] S2: Determine the minimum valve step and / or the maximum valve step for the expansion valve of the internal unit to fluctuate within a preset range.

[0069] This step is the same as in Example 1.

[0070] S3: Make the valve step of the expansion valve of the internal unit operate at the maximum valve step;

[0071] S4: In the preset period, the valve step of the expansion valve of the internal unit is reduced by the first preset valve step, and the actual superheat is detected.

[0072] The valve step of the expansion valve of the indoor unit is the maximum valve step minus 1 first preset valve step D step. At this time, the a...

Embodiment 3

[0078] When the air-conditioning indoor unit completes the self-adaptive adjustment according to the control method of embodiment 1 or 2, and the system output capacity is stable, if one of the indoor units is manually turned off or on, causing the valve step to fluctuate again, perform the steps of embodiment 1 or 2 again The air-conditioning internal unit control method until the output capacity of the air-conditioning system reaches stability again.

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Abstract

The invention provides an air-conditioning internal machine control method and system, an air conditioner and a readable storage medium. The air-conditioning internal machine control method comprisesthe following steps that after a flow inflection point of an electronic expansion valve of an air-conditioning internal machine is found, starting from a minimum valve step of the electronic expansionvalve, one first preset valve step is progressively increased in each preset adjustment cycle, the actual superheat degree is detected, when the actual superheat degree is less than the target superheat degree for the first time, one second preset valve step is reduced in the internal machine valve step, and the control is exited until the system capacity output changes. The air-conditioning internal machine control method has the advantages that the superheat degree of the internal machine is adaptively corrected, the opening degree of the internal machine valve is optimized, the internal machine valve is prevented from repeatedly fluctuating, and the internal machine capacity is stably output.

Description

technical field [0001] The invention relates to the technical field of an air conditioner internal unit, in particular to an air conditioner internal unit control method and system, an air conditioner and a readable storage medium. Background technique [0002] At present, due to the structural limitation of the electronic expansion valve of the internal unit of the air conditioner, the flow curve cannot transition smoothly. For example, the maximum valve step is 480 steps, and there will be a flow inflection point between 200 and 300 steps (the section with a large slope of the flow curve), causing the internal unit to The valve is not easy to control at the inflection point (the inflection point position of the electronic expansion valve of the internal unit, the control is unstable, it is difficult to find the balance point of adjustment, and the adjustment is easy to go too far), and high pressure, internal unit superheat, valve opening, and air outlet temperature cycle w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/64F24F11/84
CPCF24F11/64F24F11/84
Inventor 刘永超章秋平刘合心黄春程相欣方长顺郭玉洁
Owner NINGBO AUX ELECTRIC
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