Gas supply and enthalpy increase system for frequency conversion compressor with normally open air supply port, its control method, and computer-readable storage medium

A variable frequency compressor, the technology of supplementing air and increasing enthalpy, which is applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as reliability, system with liquid, and parameters that are too small.

Active Publication Date: 2021-06-04
GUANGDONG HIWAVE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For the air supply and enthalpy increasing system of the variable frequency compressor, if the air supply port is kept open, when the compressor is running at low frequency, it is easy to enter the liquid from the air supply port, causing the system to run with liquid, causing reliability risks
[0003] In order to solve the problem of liquid-filled operation of the above-mentioned system, the existing technology is to set one or several fixed minimum operating frequencies, and prohibit the compressor from operating below the minimum operating frequency, but the system has various working conditions, and the fixed value is used to limit The scheme is difficult to meet the needs of all working conditions, resulting in the phenomenon that sometimes the parameters are too small to cause system risk, and sometimes too large to reduce user comfort.

Method used

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  • Gas supply and enthalpy increase system for frequency conversion compressor with normally open air supply port, its control method, and computer-readable storage medium
  • Gas supply and enthalpy increase system for frequency conversion compressor with normally open air supply port, its control method, and computer-readable storage medium
  • Gas supply and enthalpy increase system for frequency conversion compressor with normally open air supply port, its control method, and computer-readable storage medium

Examples

Experimental program
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Effect test

Embodiment 1

[0045] This embodiment provides a system control method for the air supply and enthalpy increase system of the variable frequency compressor with the air supply port normally open, including the following: figure 1 The following steps are shown:

[0046] Step S11. When starting up and running, the compressor first runs at the oil return frequency F1 for a time of 1 minute, and then directly increases the frequency to run at the target frequency Fx, wherein the oil return frequency F1 and the running time time1 are determined by the system characteristics, and the target frequency Fx is based on the outdoor environment The temperature, indoor ambient temperature and set temperature are determined.

[0047] Step S11 is aimed at canceling redundant operating platforms (running in a certain frequency range for a period of time is defined as an operating platform), retaining only one oil return platform, and quickly rising to the target frequency corresponding to the current load a...

Embodiment 2

[0084] Embodiment 2 is on the basis of embodiment 1, the sub-step of step S12 of embodiment 1 is replaced by such as Figure 4 The following steps are shown:

[0085] Sub-step S122-1. Determine the mode of the system. If it is in the heating mode, execute sub-step S122-2. If it is in the cooling mode, execute sub-step S122-3.

[0086] Sub-step S122-2. In the heating mode, first keep the initial opening for time3, and then quickly close to the target opening. According to the difference between the current exhaust temperature and the target exhaust temperature, adjust according to rule 1 until The current exhaust temperature is equal to the target exhaust temperature.

[0087] Sub-step S122-3. In the cooling mode, first keep the initial opening for time3, then quickly close to the target opening, and determine whether the current exhaust temperature Tn is adjusted to the target exhaust temperature T0, if the current exhaust temperature Tn is not Adjust to the target exhaust t...

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Abstract

The invention relates to a system for replenishing air and increasing enthalpy of a frequency conversion compressor with a normally open air supply port, a control method thereof, and a computer-readable storage medium. The method includes: starting up the compressor and controlling the compressor to run at the oil return frequency F1 for 1 minute, then directly increase the frequency to the target frequency Fx to run; after the compressor is started, control the electronic expansion valve to maintain tieme at the initial opening degree EEVini for 3 minutes to avoid low-pressure frosting, and then Turn down to the target opening degree EEVtarget within time4 minutes, and then continue to adjust the opening degree of the electronic expansion valve to keep the specific current gas temperature parameter equal to its target value; control the compressor to run at the target frequency for time2 minutes and then increase or decrease the frequency according to the load Adjust until the current load is equal to the set minimum operating load A, and update the minimum operating frequency allowed for the compressor to operate in real time according to the opening of the electronic expansion valve and the degree of gas superheat during the adjustment process. If the compressor is reduced to the minimum operating frequency The frequency then quits the frequency-up and down-frequency adjustment and keeps running at the current operating frequency of the compressor.

Description

technical field [0001] The invention relates to a system for replenishing air and increasing enthalpy of a frequency conversion compressor with a normally open air supply port, a control method thereof, and a computer-readable storage medium. Background technique [0002] For the air supply and enthalpy increasing system of the frequency conversion compressor, if the air supply port is kept open, when the compressor is running at low frequency, it is easy to enter the liquid from the air supply port, causing the system to run with liquid, causing reliability risks. [0003] In order to solve the problem of liquid-filled operation of the above-mentioned system, the existing technology is to set one or several fixed minimum operating frequencies, and prohibit the compressor from operating below the minimum operating frequency, but the system has various working conditions, and the fixed value is used to limit It is difficult to meet the needs of all working conditions, resulti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B49/02
CPCF25B49/02F25B49/022F25B2500/28
Inventor 范轩李福水胡茂山王超逸陈诚
Owner GUANGDONG HIWAVE TECH
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