阅读说明：本技术 一种空调降噪装置及其控制方法和空调 (Air conditioner noise reduction device, control method thereof and air conditioner ) 是由 何阿龙 胡佳伟 陈成 何志超 *** 于 2019-08-30 设计创作，主要内容包括：本发明公开了一种空调降噪装置,包括控制器,与所述控制器分别电连接的传感器、电子膨胀阀和压缩机；控制器,用于接收传感器发送的噪声和振动信号,对其进行分析比较处理并输出控制信号,调节电子膨胀阀开度或/和压缩机频率。本发明还提供了一种空调,包括以上所述的空调降噪装置。本发明还公开了一种空调降噪装置的控制方法,本发明提供的降噪装置在电子膨胀阀末端设置一个噪声传感器和振动传感器,可以随时检测电子膨胀阀的噪声及振动情况,针对电子膨胀阀出现异响噪声,通过传感器检测,将检测信号传递到控制器,通过控制器根据控制逻辑调节压缩机和电子膨胀阀的步数,从而使电子膨胀阀的异响噪声符合设定的阈值。(The invention discloses an air conditioner noise reduction device, which comprises a controller, a sensor, an electronic expansion valve and a compressor, wherein the sensor, the electronic expansion valve and the compressor are respectively and electrically connected with the controller; and the controller is used for receiving the noise and vibration signals sent by the sensor, analyzing and comparing the signals, outputting control signals and adjusting the opening of the electronic expansion valve or/and the frequency of the compressor. The invention also provides an air conditioner which comprises the air conditioner noise reduction device. The invention also discloses a control method of the air conditioner noise reduction device, the noise reduction device provided by the invention is provided with a noise sensor and a vibration sensor at the tail end of the electronic expansion valve, the noise and vibration condition of the electronic expansion valve can be detected at any time, the abnormal noise of the electronic expansion valve is detected by the sensor, a detection signal is transmitted to the controller, and the controller adjusts the step number of the compressor and the electronic expansion valve according to the control logic, so that the abnormal noise of the electronic expansion valve accords with the set threshold value.)

1. The noise reduction device of the air conditioner is characterized by comprising a controller (4), a sensor (1), an electronic expansion valve (2) and a compressor (3), wherein the sensor (1), the electronic expansion valve (2) and the compressor (3) are respectively and electrically connected with the controller (4); and the controller (4) is used for receiving the noise and vibration signals sent by the sensor (1), analyzing and comparing the noise and vibration signals, outputting control signals and adjusting the opening degree of the electronic expansion valve (2) or/and the frequency of the compressor (3).

2. The noise reduction device of the air conditioner according to claim 1, wherein the sensor (1) is used for detecting noise or/and vibration signals of the outdoor unit, and the sensor (1) comprises a noise sensor and a vibration sensor.

3. The air conditioner noise reduction device according to claim 2, wherein the noise sensor and the vibration sensor are fixedly arranged at the tail end of the electronic expansion valve (2) and detect the noise and vibration conditions of the electronic expansion valve (2).

4. An air conditioner comprising a four-way valve, an outdoor unit of the air conditioner and an indoor unit of the air conditioner, which are connected in sequence by a pipe, characterized by further comprising the noise reduction device of the air conditioner according to any one of claims 1 to 3, wherein the noise reduction device of the air conditioner is used for adjusting the noise of the electronic expansion valve (2).

5. A control method of an air conditioner noise reduction device is characterized by comprising the following steps:

The noise and vibration detection is carried out on the electronic expansion valve (2) through a noise sensor and a vibration sensor, the noise value and the vibration value of the electronic expansion valve (2) are mainly detected, and the detected signals are sent to a controller (4);

the controller (4) receives the noise and vibration signals sent by the sensor (1), calculates and analyzes the signal data, outputs a control signal according to the comparison and analysis result, and adjusts the opening degree of the electronic expansion valve (2) or/and the frequency of the compressor (3).

6. The control method of the air conditioner noise reduction device according to claim 5, wherein the controller (4) is provided with a preset noise threshold and a preset vibration threshold, the controller (4) receives the noise and vibration signals sent by the sensor (1), and calculates and analyzes the noise and vibration signals with the preset noise threshold and vibration threshold, the noise value is greater than the noise threshold, the vibration value is smaller than the vibration threshold, and the controller (4) adjusts the first frequency of the compressor (3) to make the noise value meet the noise threshold.

7. The control method of the noise reduction device of the air conditioner according to claim 6, wherein the first frequency adjusting range of the compressor (3) is-15 Hz ≦ 15Hz for the compressor (3), and the first frequency of the compressor (3) is adjusted to be increased by 1Hz or decreased by 1Hz each time.

8. The control method of the noise reducing device of the air conditioner according to claim 6, wherein the noise value is less than a noise threshold value, the vibration value is greater than a vibration threshold value, and the second frequency of the compressor (3) is adjusted by the controller (4) to make the vibration value meet the vibration threshold value.

9. The control method of the noise reducing device of the air conditioner according to claim 8, wherein the second frequency adjusting range of the compressor (3) is-15 Hz ≦ compressor second frequency ≦ 15Hz, and the second frequency of the compressor (3) is increased by 3Hz or decreased by 3Hz each time.

10. The control method of the noise reducing device of the air conditioner according to claim 9, wherein the noise value is greater than a noise threshold value, the vibration value is greater than a vibration threshold value, and the step number Cpls of the electronic expansion valve (2) is adjusted by the controller (4).

11. The control method of the noise reduction device of the air conditioner according to claim 10, wherein the adjustment range of the step number of the electronic expansion valve (2) is-100 ≦ C ≦ 100.

12. The control method of the noise reduction device of the air conditioner according to claim 11, wherein the adjustment step number of the electronic expansion valve (2) is increased by 50pls or decreased by 50 pls.

Technical Field

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner noise reduction device, a control method thereof and an air conditioner.

background

The electronic expansion valve is used as a throttling element of the air conditioner, and can meet the requirement of the change of the flow of the refrigerant, thereby exerting the advantages of the variable frequency air conditioner to the maximum extent and improving the refrigerating capacity of the system. Meanwhile, when the refrigerant flows through the electronic expansion valve in the working process of the electronic expansion valve, the section is suddenly changed, the sectional area is reduced, the high-speed and high-pressure refrigerant can generate compression waves at the section, so that the system generates abnormal vibration, various noises such as throttling 'squeaking' sound, 'gurgling and grunting' sound, low-frequency noise generated by valve needle vibration and the like are generated at the electronic expansion valve, and the noise can be amplified by several times by the accessory heat exchanger to be transmitted to each air port, so that the life of a user is influenced.

Aiming at the noise of the electronic expansion valve, effective solutions in the industry to date are basically passive noise reduction, for example, a filter is added in front of the electronic expansion valve, a starting opening value of the electronic expansion valve is set, a damping block is added to the electronic expansion valve, and the like, but under the influence of production, installation and use environments, differences in all aspects still cause the above rectification scheme to fail, and a large number of units still have abnormal noise of the electronic expansion valve, thereby bringing negative effects to the market influence of products.

Disclosure of Invention

The invention aims to provide an air conditioner noise reduction device, a control method thereof and an air conditioner. The problem that when a refrigerant flows through the electronic expansion valve in the working process of the electronic expansion valve, the section is suddenly changed, the sectional area is reduced, the high-speed and high-pressure refrigerant can generate compression waves at the section, so that a system generates abnormal vibration, and various noises are generated at the electronic expansion valve is mainly solved.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

The noise reduction device of the air conditioner comprises a controller, a sensor, an electronic expansion valve and a compressor, wherein the sensor, the electronic expansion valve and the compressor are respectively and electrically connected with the controller; and the controller is used for receiving the noise and vibration signals sent by the sensor, analyzing and comparing the signals, outputting control signals and adjusting the opening of the electronic expansion valve or/and the frequency of the compressor.

Further, the sensor is used for detecting noise or/and vibration signals of the outdoor unit, and the sensor comprises a noise sensor and a vibration sensor.

Furthermore, the noise sensor and the vibration sensor are fixedly arranged at the tail end of the electronic expansion valve and used for detecting the noise and vibration conditions of the electronic expansion valve.

The air conditioner comprises a four-way valve, an air conditioner outdoor unit and an air conditioner indoor unit which are sequentially connected through a pipeline, and further comprises an air conditioner noise reduction device, wherein the air conditioner noise reduction device is used for adjusting the noise of an electronic expansion valve.

a control method of an air conditioner noise reduction device comprises the following steps:

The method comprises the following steps of detecting noise and vibration of the electronic expansion valve through a noise sensor and a vibration sensor, mainly detecting a noise value and a vibration value of the electronic expansion valve, and sending detected signals to a controller;

The controller receives the noise and vibration signals sent by the sensor, calculates and analyzes the signal data, outputs a control signal according to the calculation and analysis result, and adjusts the opening of the electronic expansion valve or/and the frequency of the compressor;

Further, the controller is provided with a preset noise threshold value of xdB and a preset vibration threshold value of ym/s ², receives the noise and vibration signals sent by the sensor, compares and analyzes the noise and vibration signals with the preset noise threshold value and vibration threshold value, and outputs a control signal according to a calculation analysis result.

Further, the noise value is larger than the noise threshold value, the vibration value is smaller than the vibration threshold value, and the noise value is made to accord with the noise threshold value by adjusting the first frequency of the compressor through the controller.

Further, the frequency adjusting range of the compressor is that the first frequency of the compressor is smaller than or equal to 15Hz and smaller than or equal to 15Hz, and the first frequency of the compressor is increased by 1Hz or decreased by 1Hz each time.

Further, the noise value is smaller than the noise threshold value, the vibration value is larger than the vibration threshold value, and the second frequency of the compressor is adjusted through the controller to enable the vibration value to accord with the vibration threshold value.

Furthermore, the frequency adjusting range of the compressor is that the second frequency of the compressor is less than or equal to 15Hz and less than or equal to 15Hz, and the second frequency of the compressor is increased by 3Hz or decreased by 3Hz each time.

further, the noise value is larger than a noise threshold value, the vibration value is larger than a vibration threshold value, and the Cpls of the step number of the electronic expansion valve is adjusted through the controller.

Furthermore, the adjustment range of the step number of the electronic expansion valve is-100 and not more than C and not more than 100.

Further, the number of steps of adjusting the number of steps of the electronic expansion valve is increased by 50pls or decreased by 50 pls.

The invention has the beneficial effects that:

The invention provides an air conditioner noise reduction device and an air conditioner, wherein a noise sensor and a vibration sensor are arranged at the tail end of an electronic expansion valve, so that the noise and vibration conditions of the electronic expansion valve can be detected at any time.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a control flow diagram of the present invention;

Fig. 2 is a diagram of a control device of the present invention.

The reference numbers in the figures illustrate: 1. a sensor; 2. an electronic expansion valve; 3. a compressor; 4. and a controller.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

It should be noted that the terms of orientation such as left, right, up, down, top and bottom in the present embodiment are only relative concepts or reference to the normal use state of the product, and should not be considered as limiting.

The air conditioner is generally composed of a compressor 3, a condenser, an electronic expansion valve 2, an evaporator, and the like. The compressor 3, the condenser, and the electronic expansion valve 2 are generally used as an outdoor unit, and the evaporator is used as an indoor unit. The noise source mainly occurs in the outdoor unit. The invention provides an air conditioner noise reduction device for controlling the operation parameters of an air conditioning system, thereby achieving the purposes of reducing noise and avoiding vibration.

As shown in fig. 2, the noise reduction device of the air conditioner provided by the invention comprises a controller 4, wherein the controller 4 is electrically connected with a sensor 1, an electronic expansion valve 2 and a compressor 3, and the sensor 1 is used for detecting noise and vibration signals of the air conditioning system; and the controller 4 is used for receiving the noise and vibration signals sent by the sensor 1, calculating and analyzing the noise and vibration signals and outputting control signals, and adjusting the opening of the electronic expansion valve 2 or/and the frequency of the compressor 3 to avoid resonance and reduce noise. Preferably, the sensor 1 is used for detecting noise or/and vibration signals of the outdoor unit; the controller 4 is used for receiving the detection signal sent by the sensor 1, calculating and analyzing the detection signal, outputting a control signal according to the calculation and analysis result, and adjusting the running frequency of the compressor 3.

Changing the rotation speed of the compressor 3 can change the vibration frequency of the compressor 3, so that the operation frequency of the compressor 3 is far away from the natural frequency of the air conditioning system, thereby solving the problems of resonance and abnormal noise. The opening of the electronic valve is adjusted, so that the pressure of an evaporator and a condenser of the air conditioning system can be changed, namely the use working condition of the compressor 3 is changed, and abnormal vibration and noise under the specific working condition are eliminated. The opening degree of the electronic expansion valve 2 and the frequency of the compressor 3 have a one-to-one correspondence relationship, and the matching relationship is set in the design and experiment stages and written in the storage module of the controller 4. Therefore, the vibration frequency of the compressor 3 can be changed no matter the rotating speed of the compressor 3 or the opening degree of the electronic expansion valve 2 is changed or the rotating speed and the opening degree of the electronic expansion valve are changed simultaneously, so that the operation frequency of the compressor 3 is far away from the natural frequency of the air conditioning system, and the problems of resonance and abnormal noise are solved.

Further, the sensor 1 includes a noise sensor and a vibration sensor, which are fixedly disposed at the end of the electronic expansion valve 2, and can detect the noise and vibration conditions of the electronic expansion valve 2 at any time.

The invention also provides an air conditioner which comprises the air conditioner noise reduction device described in the embodiment.

As shown in figure 1, the invention also provides a control method of the air conditioner noise reduction device, a noise sensor and a vibration sensor are arranged at the tail end of the electronic expansion valve 2, the noise and vibration conditions of the electronic expansion valve 2 can be detected at any time, the predetermined values (a noise threshold value xdB and a vibration threshold value ym/s ²) are set, if the noise and the vibration conditions are qualified, the operation is carried out according to the original logic, if the noise and the vibration conditions are unqualified, the operation frequency or the valve step number of the compressor 3 is adjusted according to the logic to eliminate abnormal noise, closed-loop control is formed by one circulation, and the upper limit value and the lower limit value of the adjustment are set under the condition of not influencing the performance and the reliability of.

According to an embodiment of the present invention, a method for controlling a noise reduction device of an air conditioner is provided, as shown in a flowchart of an embodiment of the method of the present invention shown in fig. 1. The method at least comprises the following steps:

Step S1: and (5) switching on the power supply and operating the prototype.

step S2: the noise and vibration detection of the electronic expansion valve 2 is performed by a noise sensor and a vibration sensor, and mainly the noise value and the vibration value of the electronic expansion valve 2 are detected.

step S3: the noise value and the vibration acceleration detected by the noise sensor and the vibration sensor in real time are transmitted to the controller 4, and the controller 4 compares and analyzes the set noise threshold value and the set vibration threshold value to further judge and select.

Step S4: and judging the signal intensity of the noise obtained by the analysis processing based on the noise threshold value. Judging whether the selected noise value is larger than xdB according to the noise value detected in real time in the step 3, and if so, executing a step S41; if not, step S42 is performed.

And step S41, judging the signal intensity of the vibration obtained by the analysis processing based on the vibration threshold, detecting whether the judged vibration value of the electronic expansion valve 2 is larger than ym/S ² in real time through a vibration sensor, if so, executing step S411, and if not, executing step S1.

Step S411, judging the signal intensity of the noise obtained by the analysis, when the noise value is larger than xdB and the vibration value is smaller than y m/S ², namely the noise value exceeds the noise threshold value and the vibration value accords with the vibration threshold value, adjusting the first frequency of the compressor 3 through the controller 4, adjusting the frequency of the compressor 3, detecting the noise value at the moment through the noise sensor again to judge whether the noise value is larger than xdB, if so, executing step S411, continuously adjusting the frequency of the compressor 3, and if not, executing step S1.

Furthermore, the first frequency of the compressor 3 is adjusted, experiments show that the influence of the adjustment of the running frequency of the compressor 3 on the noise value of the abnormal sound is obvious, and the purpose of optimizing the noise value can be achieved by properly adjusting the frequency of the compressor 3. The adjusting range of the frequency of the compressor 3 is-15. the first frequency of the compressor is 15.

Preferably, each time the first frequency of the compressor 3 is adjusted to ± 1Hz, the first frequency of the compressor 3 is positive when the operating frequency of the compressor 3 is below 50Hz, and the first frequency of the compressor 3 is negative when the operating frequency of the compressor 3 is above 50 Hz.

And step S42, judging the signal intensity of the noise obtained by the analysis processing through the vibration value detected by the vibration sensor to be larger than y m/S ², if so, executing step S5, and if not, executing step S1.

And step S5, judging the signal intensity of the vibration obtained by the analysis processing, and adjusting the second frequency of the compressor 3 through the controller 4 when the vibration value is greater than y m/S ², namely the noise value meets the noise threshold value and the vibration value is greater than the vibration threshold value.

furthermore, a second frequency Hz of the compressor 3 is adjusted, experiments show that when the vibration value exceeds the vibration threshold value, the actual abnormal noise of the electronic expansion valve 2 is very obvious, the purpose of quickly optimizing the noise can be achieved only by adjusting the frequency of the compressor 3 greatly, and the adjustment range of the second frequency of the compressor 3 is-15 Hz and not more than 15 Hz.

Preferably, the frequency B of the compressor 3 is adjusted to ± 3Hz each time, the frequency B of the compressor 3 is positive when the operating frequency of the compressor 3 is below 50Hz, and the second frequency of the compressor 3 is negative when the operating frequency of the compressor 3 is above 50 Hz.

Step S6: by adjusting the frequency of the compressor 3, the noise sensor and the vibration sensor detect again and judge by the controller 4 whether the noise value is greater than the noise threshold value and/or the vibration value is greater than the vibration threshold value, if so, step S7 is performed; if not, step S1 is executed to return to the initial power-on detection state, and the loop is performed.

And step S7, judging the signal intensity of the noise and vibration obtained by the analysis, and when the noise value is greater than xdB and the vibration value is greater than y m/S ², namely the noise value is greater than the noise threshold value and the vibration value is greater than the vibration threshold value, adjusting Cpls of the step number of the electronic expansion valve 2 through the controller 4, wherein C is greater than or equal to 100 and greater than or equal to-100 and the step number of the electronic expansion valve 2.

Further, the possible abnormal noise corresponding to the difference in the number of steps of the electronic expansion valve 2 is greatly different and has poor consistency, most of the number of steps are adjusted as much as possible to seek for the noise value and the vibration value to fall within the range of the noise threshold value and the vibration threshold value, Cpls, which is the preferable number of steps of the electronic expansion valve 2, is ± 50, C is positive when the number of steps of the electronic expansion valve 2 is below 300pls, and C is negative when the number of steps of the electronic expansion valve 2 is above 300 pls.

Further, after adjusting the step number Cpls of the electronic expansion valve 2, the noise sensor and the vibration sensor again detect the noise value and the vibration value of the electronic expansion valve 2 at this time, and if the noise value and/or the vibration value exceed the noise threshold value and the vibration threshold value, the step S7 is continuously performed to adjust the step number Cpls of the electronic expansion valve 2 until the noise value and the vibration value are within the noise threshold value and the vibration threshold value.

Preferably, the first embodiment is a side-air-out multi-connected air pipe machine with a noise threshold of 45dB and a vibration threshold of 2m/s ², the second embodiment is a top-air-out multi-connected air pipe machine with a noise threshold of 48dB and a vibration threshold of 2m/s ², the third embodiment is a household machine and a water heater with a noise threshold of 50dB and a vibration threshold of 3m/s ², and the fourth embodiment is a machine tool cooler with a noise threshold of 50dB and a vibration threshold of 4m/s ².

The invention provides a control method of an air conditioner noise reduction device, aiming at abnormal noise of an electronic expansion valve 2, detecting by a sensor 1, transmitting a detection signal to a controller 4, and adjusting the step number of a compressor 3 and the electronic expansion valve 2 by the controller 4 according to a control logic, so that the abnormal noise of the electronic expansion valve 2 accords with a set threshold value.

The invention provides a control method of an air conditioner noise reduction device, which mainly aims at the coping scheme of three conditions that abnormal sound occurs to an electronic expansion valve 2, wherein 1, a noise value and a vibration value detected by a noise sensor and a vibration sensor exceed a noise threshold and a vibration threshold, 2, the detected noise value exceeds the noise threshold, vibration accords with the vibration threshold, 3, the noise value detected by the noise sensor and the vibration sensor accords with the noise threshold, the vibration value exceeds the vibration threshold, when the vibration value is larger than ym/s ², the second frequency of a compressor 3 is adjusted, the second frequency is detected again, if the noise value is larger than xdB or the vibration value is larger than ym/s ², the step number Cpls of the electronic expansion valve 2 is adjusted, when the noise value is larger than xdB and the vibration value is smaller than ym/s ², the first frequency of the compressor 3 is adjusted, and a prototype normally operates and performs circular detection under other conditions.

According to the noise reduction device provided by the invention, the noise sensor and the vibration sensor are fixedly connected at the tail end of the electronic expansion valve 2, the electronic expansion valve 2 is subjected to logic control, the frequency of the compressor 3 and the electronic expansion valve 2 are subjected to cyclic adjustment and real-time correction, the automatic noise reduction effect of the air conditioner is achieved, and the sound quality of the air conditioner is effectively improved.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.