阅读说明：本技术 一种多联机空调快速制冷的方法 (Method for rapidly refrigerating multi-split air conditioner ) 是由 景小东 范增年 相金波 于 2021-07-26 设计创作，主要内容包括：本发明提供一种多联机空调快速制冷的方法,所述方法依次包括如下步骤：系统根据内机环境温度、外机环境温度、系统设定温度判断是否进入快速制冷模式；空调满足进入快速制冷模式的条件则进入快速制冷模式的准备阶段,将外机风机转速、内机风机转速、外机电子膨胀阀开度均调至最大值,同时计算内机开启容量比,同时根据内机开启容量比选择系统预设的压机频率以及内机电子膨胀阀开度；准备阶段结束,将内机电子膨胀阀开至目标开度,压机频率调至目标压机频率；退出快速制冷模式。本专利以一种预判的目标值代替系统自我调节逐步达成的稳定状态,缩短了系统进入稳定状态的时间,保证用户在使用空调时,可以以最快的速度达到最佳的制冷运转状态。(The invention provides a method for rapidly refrigerating a multi-split air conditioner, which sequentially comprises the following steps: the system judges whether to enter a quick refrigeration mode according to the environment temperature of the inner unit, the environment temperature of the outer unit and the set temperature of the system; when the air conditioner meets the condition of entering a rapid refrigeration mode, entering a preparation stage of the rapid refrigeration mode, adjusting the rotating speed of an outer machine fan, the rotating speed of an inner machine fan and the opening of an outer machine electronic expansion valve to the maximum value, simultaneously calculating the opening capacity ratio of the inner machine, and simultaneously selecting the frequency of a press preset by a system and the opening of the inner machine electronic expansion valve according to the opening capacity ratio of the inner machine; after the preparation stage is finished, opening the electronic expansion valve of the internal machine to a target opening degree, and adjusting the frequency of the press to the target press frequency; and exiting the quick cooling mode. The system uses a prejudged target value to replace a stable state which is gradually achieved by self-regulation of the system, shortens the time for the system to enter the stable state, and ensures that a user can reach the optimal refrigeration running state at the fastest speed when using the air conditioner.)

1. A method for rapidly refrigerating a multi-split air conditioner is characterized by sequentially comprising the following steps:

s1, after the air conditioner is started, the system judges whether to enter a quick refrigeration mode according to the environment temperature of the indoor unit, the environment temperature of the outdoor unit and the set temperature of the system;

s2, if the air conditioner satisfies the condition for entering the rapid cooling mode, entering a preparation stage of the rapid cooling mode, wherein the preparation stage of the rapid cooling mode includes the following steps,

the rotating speed of the outer machine fan, the rotating speed of the inner machine fan and the opening degree of the outer machine electronic expansion valve are all adjusted to the maximum value, meanwhile, the opening capacity ratio of the inner machine is calculated, namely the ratio of the total opening number of the inner machine to the total opening number of the outer machine,

if the opening capacity ratio of the internal machine is less than or equal to 30%, the target frequency of the press is adjusted to a first frequency value, and the opening of an electronic expansion valve of the internal machine is opened to 15% of the total stroke;

if the opening capacity ratio is more than 30% and less than or equal to 50%, the target frequency of the press is adjusted to a second frequency value, and the opening degree of the electronic expansion valve of the opening internal machine is 18% of the total stroke;

if the opening capacity ratio is more than 50% and less than or equal to 80%, the target frequency of the press is adjusted to a third frequency value, and the opening degree of the electronic expansion valve of the opening internal machine is 21% of the total stroke;

if the opening capacity ratio is more than 80% and less than or equal to 100%, the target frequency of the press is adjusted to a fourth frequency value, and the opening degree of the electronic expansion valve of the internal machine is opened to 25% of the total stroke;

if the opening capacity ratio is larger than 100% and smaller than or equal to 130%, the target frequency of the press is adjusted to a fifth frequency value, and the opening degree of the electronic expansion valve of the internal machine is opened to 32% of the total stroke;

the fifth frequency value > the fourth frequency value > the third frequency value > the second frequency value > the first frequency value;

when the temperature is more than or equal to 1 ℃ and less than or equal to R3-R2 and less than or equal to 3 ℃, the opening degree of the internal machine electronic expansion valve is kept, when the temperature is more than 3 ℃ from R3-R2, the opening degree of the internal machine electronic expansion valve is increased, when the temperature is less than 1 ℃ from R3-R2, the opening degree of the internal machine electronic expansion valve is reduced, R3 is the temperature of the internal machine capillary tube, and R2 is the temperature after the internal machine capillary tube is throttled;

s3, finishing the preparation stage, opening the electronic expansion valve of the internal machine to a target opening, and adjusting the frequency of the press to the target press frequency;

and S4, when the system meets the condition of exiting the quick cooling mode, the quick cooling mode exits.

2. A method for rapidly refrigerating a multi-split air conditioner as recited in claim 1, wherein the conditions for the air conditioner to enter the rapid refrigerating mode are as follows:

Ta-Ts is more than or equal to 4 ℃, Ta is more than or equal to 30 ℃, Th is more than or equal to 30 ℃,

wherein Ta is the internal machine environment temperature, Ts is the system set temperature, and Th is the external machine environment temperature.

3. The method for rapidly refrigerating the multi-split air conditioner as recited in claim 2, wherein: step 2, step 3, the running time of the rapid refrigeration mode is more than 30 minutes, and the rapid refrigeration mode is finished; or the operation time of the rapid refrigeration mode in the steps 2 and 3 is more than 12 minutes, and the Ta-Ts is less than 2 ℃, and the rapid refrigeration mode is ended.

4. A method for rapidly refrigerating a multi-split air conditioner as recited in claim 1, wherein: in the step 3, the frequency of the press is adjusted to the target press frequency in 6-8 s.

Technical Field

The invention relates to the technical field of air conditioners, in particular to a method for quickly refrigerating a multi-split air conditioner.

Background

Due to the complex control system, the multi-split air conditioner sets a lowest target frequency for the press during the operation of the refrigeration opening stage in order to ensure the safe operation of the press, and the target opening degree of the electronic expansion valve of the internal machine is small, so as to avoid that the liquid refrigerant is sucked into the press due to the improper evaporation of the refrigerant, so that the liquid impact of the press is caused, and the press is damaged. Although the method is stable and reliable, the air conditioner cannot enter efficient cooling operation quickly after a user starts the machine, and the use feeling is poor.

Disclosure of Invention

The invention aims to provide a method for quickly refrigerating a multi-split air conditioner, which aims to solve the problem that the quick refrigerating effect is difficult to achieve in order to maintain the stability of a system when the existing multi-split air conditioner is started.

In order to achieve the purpose, the invention provides the following technical scheme: the method for rapidly refrigerating the multi-split air conditioner sequentially comprises the following steps of:

s1, after the air conditioner is started, the system judges whether to enter a quick refrigeration mode according to the environment temperature of the indoor unit, the environment temperature of the outdoor unit and the set temperature of the system;

s2, if the air conditioner satisfies the condition for entering the rapid cooling mode, entering a preparation stage of the rapid cooling mode, wherein the preparation stage of the rapid cooling mode includes the following steps,

the rotating speed of the outer machine fan, the rotating speed of the inner machine fan and the opening degree of the outer machine electronic expansion valve are all adjusted to the maximum value, meanwhile, the opening capacity ratio of the inner machine is calculated, namely the ratio of the total opening number of the inner machine to the total opening number of the outer machine,

if the opening capacity ratio of the internal machine is less than or equal to 30%, the target frequency of the press is adjusted to a first frequency value, and the opening of an electronic expansion valve of the internal machine is opened to 15% of the total stroke;

if the opening capacity ratio is more than 30% and less than or equal to 50%, the target frequency of the press is adjusted to a second frequency value, and the opening degree of the electronic expansion valve of the opening internal machine is 18% of the total stroke;

if the opening capacity ratio is more than 50% and less than or equal to 80%, the target frequency of the press is adjusted to a third frequency value, and the opening degree of the electronic expansion valve of the opening internal machine is 21% of the total stroke;

if the opening capacity ratio is more than 80% and less than or equal to 100%, the target frequency of the press is adjusted to a fourth frequency value, and the opening degree of the electronic expansion valve of the internal machine is opened to 25% of the total stroke;

if the opening capacity ratio is larger than 100% and smaller than or equal to 130%, the target frequency of the press is adjusted to a fifth frequency value, and the opening degree of the electronic expansion valve of the internal machine is opened to 32% of the total stroke;

the fifth frequency value > the fourth frequency value > the third frequency value > the second frequency value > the first frequency value;

when the temperature is more than or equal to 1 ℃ and less than or equal to R3-R2 and less than or equal to 3 ℃, the opening degree of the internal machine electronic expansion valve is kept, when the temperature is more than 3 ℃ from R3-R2, the opening degree of the internal machine electronic expansion valve is increased, when the temperature is less than 1 ℃ from R3-R2, the opening degree of the internal machine electronic expansion valve is reduced, R3 is the temperature of the internal machine capillary tube, and R2 is the temperature after the internal machine capillary tube is throttled;

s3, finishing the preparation stage, opening the electronic expansion valve of the internal machine to a target opening, and adjusting the frequency of the press to the target press frequency;

and S4, when the system meets the condition of exiting the quick cooling mode, the quick cooling mode exits.

Preferably, the conditions for the air conditioner to enter the rapid cooling mode are as follows:

Ta-Ts is more than or equal to 4 ℃, Ta is more than or equal to 30 ℃, Th is more than or equal to 30 ℃,

wherein Ta is the internal machine environment temperature, Ts is the system set temperature, and Th is the external machine environment temperature.

Preferably, the running time of the rapid refrigeration mode in the steps 2 and 3 is more than 30 minutes, and the rapid refrigeration mode is ended; or the operation time of the rapid refrigeration mode in the steps 2 and 3 is more than 12 minutes, and the Ta-Ts is less than 2 ℃, and the rapid refrigeration mode is ended.

Preferably, in the step 3, the frequency of the press is adjusted to the target press frequency in 6-8 s.

The invention has the beneficial effects that:

this patent replaces system self-control with the target value of prejudgement and progressively reaches steady state, has effectively solved many online air conditioners, when the refrigeration is opened, can't get into high-efficient refrigeration moving problem fast, and the many online air conditioners that use this patent method have effectively shortened the time that the system got into refrigeration steady state after the refrigeration is opened, have promoted user experience and have felt.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

In this embodiment, a household small multi-split RFC125 multi-split air conditioner is taken as an example to explain a method for rapidly cooling the multi-split air conditioner in detail, and the method sequentially includes the following steps:

s1, after the air conditioner is started, the system judges whether to enter a rapid cooling mode according to the indoor unit environment temperature Ta, the outdoor unit environment temperature Th and the system set temperature Ts, wherein the conditions for the air conditioner to enter the rapid cooling mode are as follows: Ta-Ts is more than or equal to 4 ℃, Ta is more than or equal to 30 ℃, and Th is more than or equal to 30 ℃. The condition that the air conditioner enters the rapid cooling mode is set, so that the air conditioner still enters the rapid cooling mode under the condition that the indoor temperature is close to the temperature set by a user.

S2, if the air conditioner meets the condition of entering the quick cooling mode, entering a preparation stage of the quick cooling mode, wherein the preparation stage of the quick cooling mode comprises the following control steps:

the rotating speed of the outer machine fan, the rotating speed of the inner machine fan and the opening degree of the outer machine electronic expansion valve are all adjusted to the maximum value, meanwhile, the opening capacity ratio of the inner machine is calculated, namely the ratio of the total opening number of the inner machine to the total opening number of the outer machine,

if the opening capacity ratio of the internal machine is less than or equal to 30%, the target frequency of the press is adjusted to 20HZ, and the opening of an electronic expansion valve for opening the internal machine is 70 pls;

if the opening capacity ratio is more than 30% and less than or equal to 50%, adjusting the target frequency of the press to 26HZ, and opening the electronic expansion valve of the internal machine by 85 pls;

if the opening capacity ratio is more than 50% and less than or equal to 80%, the target frequency of the press is adjusted to 35HZ, and the opening of an electronic expansion valve of an internal machine is opened to 98 pls;

if the opening capacity ratio is more than 80% and less than or equal to 100%, the target frequency of the press is adjusted to 60HZ, and the opening degree of an electronic expansion valve of the internal machine is opened to 118 pls;

if the opening capacity ratio is more than 100% and less than or equal to 130%, the target frequency of the press is adjusted to 72HZ, and the opening degree of an electronic expansion valve of the internal machine is opened to 150 pls;

because the sizes of the multi-split air conditioner heat exchangers with different models are different, the discharge capacities of the presses are different, and the sizes of the apertures of the electronic expansion valves of the inner machines are different, the target frequency of the presses and the opening data of the electronic expansion valves of the inner machines are different in the preparation stage, and only one of the electronic expansion valves is shown in the embodiment.

And when the temperature is more than or equal to 1 ℃ and less than or equal to R3-R2 and less than or equal to 3 ℃, the opening degree of the internal machine electronic expansion valve is maintained, when the temperature is more than 3 ℃ from R3-R2, the opening degree of the internal machine electronic expansion valve is increased, when the temperature is less than 1 ℃ from R3-R2, the opening degree of the internal machine electronic expansion valve is reduced, R3 is the temperature of the internal machine capillary tube, and R2 is the temperature after the internal machine capillary tube is throttled.

And S3, finishing the preparation stage, opening the internal machine electronic expansion valve to a target opening, and adjusting the frequency of the press to the target press frequency within 6-8S.

And S4, when the system meets the condition of exiting the quick cooling mode, the quick cooling mode exits. The conditions for exiting the rapid cooling mode are two: 1. step 2, step 3, the running time of the rapid refrigeration mode is more than 30 minutes, and the rapid refrigeration mode is finished; 2. and (3) the operation time of the rapid refrigeration mode is more than 12 minutes, the Ta-Ts is less than 2 ℃, and the rapid refrigeration mode is ended.

After the rapid refrigeration mode is finished, the refrigerant throttling device and the frequency of the press are normally controlled according to the high-low pressure sensor of the control system, so that the operation of the press and the optimal energy efficiency are ensured.

After the multi-split air conditioner of the embodiment enters the rapid refrigeration mode, a stable refrigeration state can be achieved after 0.24min, compared with a traditional control method, the time is shortened by 1min, and the effect is very obvious.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.