CN213657186U - Automatic liquid impact prevention system for refrigerant recovery machine - Google Patents
Automatic liquid impact prevention system for refrigerant recovery machine Download PDFInfo
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- CN213657186U CN213657186U CN202022274265.4U CN202022274265U CN213657186U CN 213657186 U CN213657186 U CN 213657186U CN 202022274265 U CN202022274265 U CN 202022274265U CN 213657186 U CN213657186 U CN 213657186U
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Abstract
The utility model discloses a vacuum pump provides a simple structure, but automatic identification and prevention liquid impact take place to the extension is retrieved quick-witted life, and makes the refrigerant recovery machine that retrieves speed and keep the best state prevent liquid impact system with automatic, has solved the refrigerant recovery in-process that exists among the prior art and has very easily caused the liquid impact phenomenon, thereby technical problem such as quick-witted life and refrigerant recovery efficiency are retrieved in the influence, and it is including retrieving the machine, retrieves the compressor air inlet on the machine and connects on air conditioning system be equipped with vibration sensor or high accuracy pressure sensor on retrieving the machine, vibration sensor and high accuracy pressure sensor are all connecting the controller, and the controller is according to the drift diameter size of the compressor exhaust pressure fluctuation value real-time control air inlet that vibration sensor's detection information or high accuracy pressure sensor detected.
Description
Technical Field
The utility model relates to a refrigerant recovery machine especially relates to one kind and can automatic identification and prevent that the liquid hits the emergence at refrigerant recovery in-process to make the refrigerant recovery machine that the speed of retrieving keeps the optimum state prevent liquid hits the system with automatic.
Background
Along with the enhancement of environmental awareness and the continuous increase of the price of the refrigerant, the refrigerant recycling machine starts to be increasingly popularized and applied, but the existing recycling machine generally has the liquid impact phenomenon in the refrigerant recycling process, namely, too much liquid refrigerant enters a cylinder of a compressor, and due to the incompressible characteristic of liquid, the liquid refrigerant can not be discharged in time when a compressor piston is compressed to be close to a top dead center in the operation process of the compressor, so that the phenomenon that the compressor piston impacts the liquid refrigerant is caused, slight and short-time liquid impact has little influence on the service life of the recycling machine, but the long-time and violent liquid impact of a large amount of liquid refrigerant can easily cause the damage of related parts such as a compressor piston ring, a bearing, a valve assembly and the like, and simultaneously can easily cause the damage of related pressure elements (a pressure gauge, a pressure sensor, a pressure protection switch and the like), so that the service life of, and the complete machine protection is easy to lose efficacy to cause safety accidents, and the life and property safety of people is threatened directly. In order to prevent the liquid impact phenomenon, the size of the inlet of the recovery pipeline needs to be adjusted in time according to the operation condition of the recovery machine, but the existing recovery machine is basically adjusted manually, the liquid impact phenomenon is judged and identified according to the experience of a user, and the judgment error cannot be avoided, so that the recovery efficiency of the recovery machine is directly influenced or a safety accident is caused.
Disclosure of Invention
The utility model mainly provides a simple structure, but automatic identification and prevention liquid attack take place to the extension is retrieved quick-witted life, and makes the refrigerant recovery machine that the speed of retrieving keeps the best state prevent liquid attack system with automatic, has solved the refrigerant recovery in-process that exists among the prior art and has very easily aroused the liquid attack phenomenon, thereby influences the technical problem who retrieves quick-witted life and refrigerant recovery efficiency etc..
The above technical problem of the present invention can be solved by the following technical solutions: the utility model provides a refrigerant recovery machine is with automatic liquid hammer system that prevents, is including retrieving the machine, retrieves the compressor air inlet on the machine and connects on air conditioning system be equipped with vibration sensor or high accuracy pressure sensor on retrieving the machine, vibration sensor and high accuracy pressure sensor are all connecting the controller, and the controller is according to vibration sensor's detection information or the compressor exhaust pressure fluctuation value that high accuracy pressure sensor detected the latus rectum size of air inlet in real time control. In the process of recycling the refrigerant, according to the liquid impact generation principle, namely once the liquid impact phenomenon occurs, namely impact occurs between objects, so that vibration is directly and greatly increased, or fluctuation values of pressure wave crests and wave troughs of air intake and exhaust of the compressor are greatly increased, therefore, whether the liquid impact occurs or not is judged by arranging a vibration sensor or a high-precision pressure sensor on the recycling machine, wherein the vibration sensor directly detects the change of the vibration value of the recycling machine, the high-precision pressure sensor detects the change of the pressure wave crests and the wave troughs of the air intake and exhaust of the compressor of the recycling machine, the vibration increase value or the fluctuation values of the pressure wave crests and the wave troughs of the air intake and exhaust of the compressor are uploaded to a controller and then are compared with a set value, when the change value exceeds the set value, the controller adjusts and reduces the air inlet through path of the compressor in real time to prevent the liquid impact phenomenon, otherwise when the change value, the controller adjusts and increases the air inlet drift diameter of the compressor in real time to furthest keep the size of the passage, and the liquid impact phenomenon caused by the overlarge size of the passage is avoided while the fastest recovery efficiency is achieved, so that the refrigerant recovery machine is damaged.
Preferably, the air inlet is provided with an electric control valve, and the electric control valve is connected with a controller. The drift diameter of the air inlet is automatically adjusted through the electric control valve, the reliability is high, the operation is simple and convenient, and the phenomena of misoperation, protection failure and the like can be avoided compared with manual operation.
More preferably, an integrated control valve for controlling a refrigerant recovery state is provided between the intake port and the exhaust port of the compressor, and the electric control valve is provided in the integrated control valve. The integrated control valve is used as the prior art, is a valve body structure for integrating refrigerant recovery, filling and self-cleaning, integrates an electric control valve in the integrated control valve, simplifies the structure and improves the use reliability.
Preferably, the vibration sensor is provided on the compressor and near a discharge port of the compressor. When the liquid impact phenomenon occurs, the vibration change performance of the exhaust port of the compressor is stronger, so that the vibration sensor is arranged at a position close to the exhaust port, and the liquid impact identification reliability can be improved.
More preferably, the recovery machine is provided with a noise sensor, and the noise sensor is connected to a controller. According to the liquid impact, the noise of the recycling machine is obviously increased, so that the accuracy of liquid impact identification can be improved by arranging the noise sensor.
Preferably, the compressor is provided with temperature sensors at the inlet and outlet ends thereof, and the temperature sensors are connected to a controller. The temperature difference between the air inlet and the air outlet of the compressor can be obviously changed when the liquid impact occurs, so that the accuracy of liquid impact identification can be further improved by arranging the temperature sensors at the air inlet end and the air outlet end of the compressor respectively, and the safe and reliable operation of the system is ensured.
Therefore, the utility model discloses an automatic liquid impact system is prevented to refrigerant recovery machine has following advantage:
1. after the refrigerant recovery machine is connected to the maintenance system, the whole refrigerant recovery process is automatically adapted, the opening of the air inlet of the compressor is adjusted in real time, operators do not need to pay attention to the actual use working condition of the refrigerant recovery machine for a long time, and the method is safe, reliable, time-saving and labor-saving;
2. in the whole refrigerant recovery process, the opening of the pipeline can be always automatically and intelligently kept in the optimal opening state, so that the refrigerant recovery efficiency is improved;
3. the reliability of the refrigerant recycling machine in the process is improved, and the service life of the refrigerant recycling machine is prolonged;
4. the device is suitable for various refrigerant recovery machines and has wide application range.
Description of the drawings:
FIG. 1 is a schematic structural view of an automatic liquid impact prevention system for a refrigerant recovery machine according to the present invention;
FIG. 2 is a schematic structural view in another direction of the present invention;
fig. 3 is a gas path diagram of the present invention in the recovery mode;
fig. 4 is a flow chart of the present invention.
The specific implementation mode is as follows:
the technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.
Example 1:
as shown in fig. 1 and fig. 2, the automatic liquid impact preventing system for a refrigerant recycling machine of the present invention comprises a recycling machine, an air inlet 2 of a compressor 1 on the recycling machine is connected to an air conditioning system of a recycled refrigerant, an integrated control valve 7 is installed between the air inlet 2 and an exhaust port 6 of the compressor 1, the integrated control valve 7 is a conventional one (see an integrated control valve in patent application No. 201410139369.0) for controlling the recycling machine to perform the switching of the passage states of three working states of refrigerant recycling, refrigerant filling and recycling machine self-cleaning, a vibration sensor 3 is installed on the integrated control valve 7 near the exhaust port 6 of the compressor 1, as shown in fig. 3, an electric control valve 5 capable of controlling the size of the pipeline diameter of the air inlet 2 is connected in series on the pipeline of the integrated control valve 7 corresponding to the air inlet 2, and a noise sensor 8 is also installed on a circuit board corresponding to the lower part of the, the integrated control valve 7 corresponding to the air inlet 2 and the air outlet 6 of the compressor 1 is respectively provided with a temperature sensor 9, the internal passages of the integrated control valve 7 corresponding to the air inlet 2 and the air outlet 6 of the compressor 1 are respectively connected with a pressure sensor 11 in series, the vibration sensor 3, the electric control valve 5, the noise sensor 8, the pressure sensor 11 and the two temperature sensors 9 are connected with the controller 4, and the controller 4 controls the opening degree of the electric control valve 5 in real time according to the detection information of the vibration sensor 3, the noise sensor 8, the two pressure sensors 11 and the two temperature sensors 9 so as to adjust the size of the drift diameter of the air inlet 2.
As shown in fig. 4, an automatic liquid impact prevention system for a refrigerant recovery machine includes the following sequential steps:
1) setting the exhaust vibration limit value of the compressor 1 to be 4m/s, setting the noise limit value of the recycling machine to be 85dB, setting the pressure limit value of an air inlet/exhaust port of the compressor 1 to be 10 ℃, and setting the pressure limit value of an air inlet of the compressor 1 to be 10 bar; the vent pressure limit was 22 bar;
2) starting a recycling machine, receiving an exhaust vibration detection value of the compressor 1 detected by a vibration sensor 3 in real time by a controller 4, synchronously detecting a noise value of the recycling machine through a noise sensor 8, synchronously detecting the pressure of an air inlet/outlet of the compressor 1 through a pressure sensor 11, and synchronously detecting the temperature of the air inlet/outlet of the compressor 1 through a temperature sensor 9;
a: when the exhaust vibration limit value is greater than 4m/s, the noise is greater than 85dB, the temperature difference of an air inlet and an air outlet of the compressor is less than 10 ℃, the pressure of an air inlet of the compressor is greater than 10bar, and the pressure of the air outlet is greater than 22bar, the controller 4 reduces the drift diameter of the air inlet 2 of the compressor 1 through the electric control valve 5 until the exhaust vibration limit value is less than or equal to 4m/s, the noise limit value is less than or equal to 85dB, the pressure limit value of the air inlet and the air outlet of the compressor 1 is greater than 10 ℃, and; the limit value of the pressure of the exhaust port is less than or equal to 22 bar;
b: when the exhaust vibration limit value is less than or equal to 4m/s, the noise limit value is less than or equal to 85dB, the pressure limit value of the air inlet/exhaust port of the compressor 1 is greater than 10 ℃, and the pressure limit value of the air inlet of the compressor 1 is less than or equal to 10 bar; when the pressure limit value of the exhaust port is less than or equal to 22bar, the controller 4 gradually increases the drift diameter of the air inlet 2 of the compressor 1 through the electric control valve 5, and then the step a is carried out, the reciprocating circulation of the steps a and b is kept in the process, so that the recycling machine is kept in the maximum passage state while the liquid impact phenomenon is avoided, and the recycling efficiency of the refrigerant is improved.
Example 2:
as shown in fig. 1, a high-precision pressure sensor 10 is mounted on the integrated control valve 7 close to the exhaust port 6 of the compressor 1, the high-precision pressure sensor 10 in this embodiment is TS108 manufactured by kunshan dany sensor measurement and control technology limited, the high-precision pressure sensor 10 is connected to the controller 4, and the controller 4 controls the drift diameter of the air inlet 2 in real time according to the exhaust pressure fluctuation value of the compressor 1 detected by the high-precision pressure sensor 10.
As shown in fig. 4, the limit value of the pressure fluctuation of the exhaust gas of the compressor 1 is set to be 5bar, the high-precision pressure sensor 10 continuously collects the pressure waveform of the exhaust gas of the compressor 1 in the process, and when the difference value between the pressure wave crest and the pressure wave trough is greater than 5bar, the liquid impact is judged to occur, and the controller 4 reduces the drift diameter of the air inlet 2 of the compressor 1 through the electric control valve 5 until the limit value of the pressure fluctuation of the exhaust gas of the compressor 1 is less than. The rest is exactly the same as in example 1.
The specific embodiments described herein are merely illustrative of the principles of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (6)
1. The utility model provides a refrigerant recovery machine is with preventing liquid system of hitting voluntarily, includes the recovery machine, and compressor (1) air inlet (2) on the recovery machine are connected on air conditioning system, its characterized in that: the recycling machine is provided with a vibration sensor (3) or a high-precision pressure sensor (10), the vibration sensor (3) and the high-precision pressure sensor (10) are both connected with a controller (4), and the controller (4) controls the drift diameter of the air inlet (2) in real time according to detection information of the vibration sensor (3) or an exhaust pressure fluctuation value of the compressor (1) detected by the high-precision pressure sensor (10).
2. The automatic liquid impact prevention system for a refrigerant recovery machine according to claim 1, characterized in that: an electric control valve (5) is arranged on the air inlet (2), and the electric control valve (5) is connected with a controller (4).
3. The automatic liquid impact prevention system for a refrigerant recovery machine according to claim 2, characterized in that: an integrated control valve (7) for controlling the recovery state of the refrigerant is arranged between the air inlet (2) and the air outlet (6) of the compressor (1), and the electric control valve (5) is arranged in the integrated control valve (7).
4. The automatic liquid impact prevention system for a refrigerant recovery machine according to claim 1, characterized in that: the vibration sensor (3) is arranged on the compressor (1) and close to an exhaust port (6) of the compressor (1).
5. The automatic liquid impact prevention system for a refrigerant recovery machine according to claim 4, characterized in that: the recycling machine is provided with a noise sensor (8), and the noise sensor (8) is connected with the controller (4).
6. The automatic liquid impact prevention system for a refrigerant recovery machine according to claim 4, characterized in that: the air inlet end and the air outlet end of the compressor (1) are respectively provided with a temperature sensor (9), and the temperature sensors (9) are connected with the controller (4).
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| CN202022274265.4U CN213657186U (en) | 2020-10-13 | 2020-10-13 | Automatic liquid impact prevention system for refrigerant recovery machine |
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| CN202022274265.4U CN213657186U (en) | 2020-10-13 | 2020-10-13 | Automatic liquid impact prevention system for refrigerant recovery machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112344607A (en) * | 2020-10-13 | 2021-02-09 | 浙江飞越机电有限公司 | Intelligent control method for obtaining optimal recovery speed of refrigerant recovery machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112344607A (en) * | 2020-10-13 | 2021-02-09 | 浙江飞越机电有限公司 | Intelligent control method for obtaining optimal recovery speed of refrigerant recovery machine |
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