阅读说明：本技术 一种变频冰箱的噪声控制方法 (Noise control method of variable frequency refrigerator ) 是由 马长州 陈开松 侯雪茹 邓萍萍 于 2021-07-19 设计创作，主要内容包括：本发明公开了一种变频冰箱的噪声控制方法,涉及冰箱技术领域。本发明包括实时监测冷凝器温度、蒸发器温度以及压缩机的当前转速与目标转速；当压缩机需要升速时,将压缩机的当前转速与目标转速进行比较,并按一定的控制方式对压缩机的速度进行控制。本发明通过判断冷凝器温度变化以及蒸发器温度变化趋势来控制压缩机升速速率,能够实现整机噪声的平稳过渡,并有效降低最大噪声,用户体验更好。(The invention discloses a noise control method of a frequency conversion refrigerator, and relates to the technical field of refrigerators. The method comprises the steps of monitoring the temperature of a condenser, the temperature of an evaporator and the current rotating speed and the target rotating speed of a compressor in real time; when the compressor needs to increase the speed, the current rotating speed of the compressor is compared with the target rotating speed, and the speed of the compressor is controlled according to a certain control mode. According to the invention, the speed increasing rate of the compressor is controlled by judging the temperature change of the condenser and the temperature change trend of the evaporator, so that the stable transition of the noise of the whole machine can be realized, the maximum noise is effectively reduced, and the user experience is better.)

1. The noise control method of the frequency conversion refrigerator is characterized by comprising the following steps of:

monitoring the temperature of a condenser, the temperature of an evaporator, the current rotating speed of a compressor and a target rotating speed in real time;

step two, when the compressor needs to be accelerated, the current rotating speed of the compressor is compared with the target rotating speed, and the speed of the compressor is controlled according to the following mode:

(1) when the difference value between the target rotating speed and the current rotating speed of the compressor is not more than 600rpm, directly increasing the rotating speed of the compressor to the target rotating speed for operation;

(2) when the difference value between the target rotating speed and the current rotating speed of the compressor is more than 600rpm, the compressor is controlled in the speed increasing mode as follows:

A. gradually increasing the speed according to the speed of 120 rpm/min;

B. the temperature change of the condenser is judged in real time in the speed increasing process, and the rotating speed of the compressor is controlled according to the difference value delta T between the temperature of the condenser and the ambient temperature and the temperature Tz of the evaporator in the following mode:

(a) when the delta T is less than or equal to 6 ℃ and the evaporator temperature Tz is less than-15 ℃, maintaining the speed-up rate of the compressor at 120 rpm/min; if the Tz is more than or equal to-15 ℃ in the speed increasing process, keeping the current rotating speed of the compressor unchanged until the Tz is less than-15 ℃, and increasing the speed to the target rotating speed according to the speed increasing speed of 120 rpm/min;

(b) when the delta T is more than 6 ℃ and less than or equal to 10 ℃ and the temperature Tz of the evaporator is less than-15 ℃, the compressor is driven at the speed-up rate of 60 rpm/min; in the process of continuously increasing the speed, the Tz is more than or equal to-15 ℃, the current rotating speed of the compressor is kept unchanged until the Tz is less than-15 ℃, and then the compressor is increased to the target rotating speed according to the speed increasing speed of 60 rpm/min;

(c) when the delta T is more than 10 ℃, the compressor keeps the current rotating speed, the speed is not increased continuously, and the maximum duration time is 120 min; after continuously lasting for 120min, the rotating speed of the compressor is directly increased to the target rotating speed for operation.

Technical Field

The invention belongs to the technical field of refrigerators, and particularly relates to a noise control method of a frequency conversion refrigerator.

Background

With the continuous improvement of the requirements of users on living environment, the noise of household electrical appliances is more and more concerned by consumers; the refrigerator is used as an electric appliance which runs for 24 hours in a home, and the noise level has an important influence on the use experience of a user. The frequency conversion refrigerator is more and more popular with users due to the characteristic of low noise, and the market occupation ratio is continuously improved. The noise of the frequency conversion refrigerator is influenced by factors such as the rotating speed of a compressor, the rotating speed of a fan, the refrigerating working condition and the like, the overall noise of the frequency conversion refrigerator generally decreases along with the decrease of the rotating speed of the compressor and the rotating speed of the fan, and the noise also increases along with the increase of the rotating speed; in the daily use process, the noise of the whole machine fluctuates in a certain range.

Under the condition that the rotating speed of the compressor is not changed, the noise of the compressor changes along with the change of the refrigeration working condition; the larger the load (the higher the condensation temperature and the evaporation temperature), the larger the noise generated by the compressor and the refrigeration system. When a user uses the refrigerator, the refrigeration load of the refrigerator can be correspondingly changed along with the conditions of environment temperature change, door opening and closing, different loads placement and the like. At present, no good technical scheme is available for solving the noise change of the compressor and the refrigeration system caused by the change of the refrigeration load, most of the noise is inhibited from increasing under the condition of high load by adding sound absorption and vibration reduction materials, and the defects are that the cost is increased, the noise reduction effect is limited, particularly, the sound absorption effect is poor when the low-frequency noise is lower than 1000 HZ. Therefore, a noise control method for an inverter refrigerator is urgently needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a noise control method of a variable frequency refrigerator, and aims to solve the problems in the background technology.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a noise control method of a variable frequency refrigerator, which comprises the following steps:

monitoring the temperature of a condenser, the temperature of an evaporator, the current rotating speed of a compressor and a target rotating speed in real time;

step two, when the compressor needs to be accelerated, the current rotating speed of the compressor is compared with the target rotating speed, and the speed of the compressor is controlled according to the following mode:

(1) when the difference value between the target rotating speed and the current rotating speed of the compressor is not more than 600rpm, directly increasing the rotating speed of the compressor to the target rotating speed for operation;

(2) when the difference value between the target rotating speed and the current rotating speed of the compressor is more than 600rpm, the compressor is controlled in the speed increasing mode as follows:

A. gradually increasing the speed according to the speed of 120 rpm/min;

B. the temperature change of the condenser is judged in real time in the speed increasing process, and the rotating speed of the compressor is controlled according to the difference value delta T between the temperature of the condenser and the ambient temperature and the temperature Tz of the evaporator in the following mode:

(a) when the delta T is less than or equal to 6 ℃ and the evaporator temperature Tz is less than-15 ℃, maintaining the speed-up rate of the compressor at 120 rpm/min; if the Tz is more than or equal to-15 ℃ in the speed increasing process, keeping the current rotating speed of the compressor unchanged until the Tz is less than-15 ℃, and increasing the speed to the target rotating speed according to the speed increasing speed of 120 rpm/min;

(b) when the delta T is more than 6 ℃ and less than or equal to 10 ℃ and the temperature Tz of the evaporator is less than-15 ℃, the compressor is driven at the speed-up rate of 60 rpm/min; in the process of continuously increasing the speed, the Tz is more than or equal to-15 ℃, the current rotating speed of the compressor is kept unchanged until the Tz is less than-15 ℃, and then the compressor is increased to the target rotating speed according to the speed increasing speed of 60 rpm/min;

(c) when the delta T is more than 10 ℃, the compressor keeps the current rotating speed, the speed is not increased continuously, and the maximum duration time is 120 min; after continuously lasting for 120min, the rotating speed of the compressor is directly increased to the target rotating speed for operation.

The frequency conversion refrigerator comprises a compressor, a main control panel, a display panel, a condenser temperature sensor, an evaporator temperature sensor and an environment temperature sensor; the main control board is respectively electrically connected with the compressor, the display board, the condenser temperature sensor and the evaporator temperature sensor; the condenser temperature sensor is arranged at the middle rear part of the condenser and used for detecting the condensation temperature; the evaporator temperature sensor is arranged at the inlet section of the evaporator and used for detecting the evaporation temperature; the ambient temperature sensor and the display panel are integrated together for detecting the ambient temperature. The speed increasing rate and the subsequent running state of the compressor are determined by detecting the condensation temperature, the evaporation temperature and the ambient temperature, so that the noise control of the variable frequency refrigerator is realized.

The invention has the following beneficial effects:

1. according to the invention, the speed increasing rate of the compressor is controlled by judging the temperature change of the condenser and the temperature change trend of the evaporator, so that the stable transition of the noise of the whole machine can be realized, the maximum noise is effectively reduced, and the user experience is better.

2. According to the invention, by optimizing the speed-increasing rule, the load change of the refrigerator can be judged more accurately, the frequency of sudden increase of the rotating speed of the compressor and the increasing amplitude of the rotating speed (such as opening a door to take food materials or putting less load) are reduced, the compressor is not adjusted in real time any more, and the limited speed-increasing can be realized, so that the temperature fluctuation and the noise fluctuation are reduced.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a flow chart of a noise control method of a variable frequency refrigerator according to the present invention;

FIG. 2 is a schematic diagram illustrating the connection between the components of the inverter refrigerator according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

In the prior art, the operation speed of a compressor of an inverter refrigerator is generally controlled comprehensively based on factors such as ambient temperature, set temperature, and a difference between a compartment temperature and a target temperature. When judging that the compressor rotational speed increases, the compressor generally all is instant adjustment, directly moves according to the target rotational speed promptly, and condenser temperature can increase fast this moment, and this just easily causes the noise in the refrigerator short time to increase suddenly, leads to using to experience the worsen. There are also some usage scenarios, such as a short door opening, which results in an increase in the difference between the refrigerating or freezing temperature and the target temperature, while in practice the refrigeration load of the refrigerator does not increase significantly, and the compressor is run at a reduced speed after a few minutes of run-up, which results in a large noise fluctuation during this time.

Research shows that the noise of the compressor increases along with the increase of the evaporation temperature and the increase of the condensation temperature, the noise is more influenced by the increase of the evaporation temperature, and particularly in the cooling stage of a refrigerator, when the evaporation temperature is higher, the capillary tube jet noise of a refrigerating system is correspondingly increased, so that the noise of the whole machine is larger.

Taking an ambient temperature of 25 ℃ as an example, the compressor noise varies with the difference Δ T between the condenser temperature and the ambient temperature as follows:

as can be seen from the above tabular data: as the difference Δ T between the condenser temperature and the ambient temperature increases, the noise path of the compressor also tends to increase.

Then, also at an ambient temperature of 25 ℃, as the difference Δ T between the condenser temperature and the ambient temperature changes, the evaporator temperature change factor is increased again, and the compressor noise changes as follows:

as can be seen from the above tabular data: when the difference delta T between the ambient temperature and the condensation temperature is 5 ℃, the evaporation temperature rises by 20 degrees, and the noise of the compressor is respectively increased by 4.2dB (A) and 5.2dB (A) at 2100rpm and 3900 rpm; when the difference delta T between the ambient temperature and the condensation temperature is 10 ℃, the evaporation temperature rises by 20 degrees, and the noise of the compressor is respectively increased by 4.4dB (A) and 6.4dB (A) at 2100rpm and 3900 rpm; at 15 ℃ of the difference Δ T between ambient temperature and condensing temperature, the evaporating temperature rises by 20 degrees, and the noise increases by 4.4dB (A) and 6.3dB (A) at 2100rpm and 3900rpm of the compressor, respectively.

According to the analysis of the test data, the noise influence on the compressor and the refrigerator is larger due to the change of the evaporation temperature. When the compressor needs to increase the speed, except the temperature parameter of the condenser, the evaporating temperature is increased for judgment, which is beneficial to better controlling the noise increase amplitude of the whole machine.

Therefore, referring to fig. 1, the present invention is a noise control method for a frequency conversion refrigerator, comprising the following steps:

monitoring the temperature of a condenser, the temperature of an evaporator, the current rotating speed of a compressor and a target rotating speed in real time;

step two, when the compressor needs to be accelerated, the current rotating speed of the compressor is compared with the target rotating speed, and the speed of the compressor is controlled according to the following mode:

(1) when the difference value between the target rotating speed and the current rotating speed of the compressor is not more than 600rpm, directly increasing the rotating speed of the compressor to the target rotating speed for operation;

(2) when the difference value between the target rotating speed and the current rotating speed of the compressor is more than 600rpm, the compressor is controlled in the speed increasing mode as follows:

A. gradually increasing the speed according to the speed of 120 rpm/min;

B. the temperature change of the condenser is judged in real time in the speed increasing process, and the rotating speed of the compressor is controlled according to the difference value delta T between the temperature of the condenser and the ambient temperature and the temperature Tz of the evaporator in the following mode:

(a) when the delta T is less than or equal to 6 ℃ and the evaporator temperature Tz is less than-15 ℃, maintaining the speed-up rate of the compressor at 120 rpm/min; if the Tz is more than or equal to-15 ℃ in the speed increasing process, keeping the current rotating speed of the compressor unchanged until the Tz is less than-15 ℃, and increasing the speed to the target rotating speed according to the speed increasing speed of 120 rpm/min;

(b) when the delta T is more than 6 ℃ and less than or equal to 10 ℃ and the temperature Tz of the evaporator is less than-15 ℃, the compressor is driven at the speed-up rate of 60 rpm/min; in the process of continuously increasing the speed, the Tz is more than or equal to-15 ℃, the current rotating speed of the compressor is kept unchanged until the Tz is less than-15 ℃, and then the compressor is increased to the target rotating speed according to the speed increasing speed of 60 rpm/min;

(c) when the delta T is more than 10 ℃, the compressor keeps the current rotating speed, the speed is not increased continuously, and the maximum duration time is 120 min; after continuously lasting for 120min, the rotating speed of the compressor is directly increased to the target rotating speed for operation.

Referring to fig. 2, the inverter refrigerator of the present invention includes a compressor, a main control panel, a display panel, a condenser temperature sensor, an evaporator temperature sensor, and an ambient temperature sensor; the main control board is respectively electrically connected with the compressor, the display board, the condenser temperature sensor and the evaporator temperature sensor; the condenser temperature sensor is arranged at the middle rear part of the condenser and used for detecting the condensation temperature; the evaporator temperature sensor is arranged at the inlet section of the evaporator and used for detecting the evaporation temperature; the ambient temperature sensor and the display panel are integrated together for detecting the ambient temperature. The speed increasing rate and the subsequent running state of the compressor are determined by detecting the condensation temperature, the evaporation temperature and the ambient temperature, so that the noise control of the variable frequency refrigerator is realized.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.