CN115218571A - Method for improving compressor damage caused by compressor liquid accumulation - Google Patents
Method for improving compressor damage caused by compressor liquid accumulation Download PDFInfo
- Publication number
- CN115218571A CN115218571A CN202210897990.8A CN202210897990A CN115218571A CN 115218571 A CN115218571 A CN 115218571A CN 202210897990 A CN202210897990 A CN 202210897990A CN 115218571 A CN115218571 A CN 115218571A
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- Prior art keywords
- compressor
- temperature
- damage caused
- comparison result
- controller
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/01—Heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of liquid variable-volume instruments, in particular to a method for improving compressor damage caused by liquid accumulation of a compressor, which comprises the steps of acquiring the temperature of a compressor air suction port through a temperature sensor to obtain the current temperature; comparing the current temperature with a temperature threshold value to obtain a comparison result; the controller is started to heat based on the comparison result, so that the liquid refrigerant is heated and gasified.
Description
Technical Field
The invention relates to the technical field of liquid variable-volume instruments, in particular to a method for improving compressor damage caused by liquid accumulation of a compressor.
Background
The air conditioning unit operates in a low-temperature environment, and due to poor heat exchange, incomplete evaporation of a refrigerant is easy to occur, and the condition that refrigerant liquid or wet steam is sucked into a compressor by the compressor exists.
The compressor may be structurally damaged when it compresses the sucked liquid.
Disclosure of Invention
The invention aims to provide a method for improving compressor damage caused by compressor liquid accumulation, and aims to solve the problem that the compressor structure is damaged when the compressor compresses sucked liquid.
In order to achieve the above object, the present invention provides a method for improving compressor damage caused by compressor liquid accumulation, comprising the steps of:
acquiring the temperature of an air suction port of the compressor through a temperature sensor to obtain the current temperature;
comparing the current temperature with a temperature threshold value to obtain a comparison result;
and starting the controller to heat based on the comparison result, so that the liquid refrigerant is heated and gasified.
Wherein, before the step of acquiring the temperature of the air suction port of the compressor through the temperature sensor and obtaining the current temperature, the method further comprises the following steps:
determining a placement area based on the position of the air inlet;
mounting a temperature sensor to the placement area;
refrigerant is injected into the compressor shell.
Wherein, the specific mode of injecting the refrigerant into the compressor shell is as follows;
determining the injection amount of the refrigerant based on the capacity of the compressor and the air conditioning system;
and injecting the refrigerant with the volume equal to the injection amount into the compressor shell.
Wherein, the controller is started to heat based on the comparison result, so that the specific way of heating and gasifying the liquid refrigerant is as follows:
when the comparison result is that the current temperature is greater than or equal to the temperature threshold, the compressor normally operates;
and when the comparison result shows that the current temperature is lower than the temperature threshold value, starting the controller to heat the compressor so as to heat and gasify the liquid refrigerant.
When the controller heats the compressor, the controller works under the working condition of large torque and low rotating speed.
The invention relates to a method for improving compressor damage caused by compressor liquid accumulation.A temperature sensor is used for acquiring the temperature of a compressor air suction port to obtain the current temperature; comparing the current temperature with a temperature threshold value to obtain a comparison result; the controller is started to heat based on the comparison result, so that the liquid refrigerant is heated and gasified.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a method for improving compressor damage caused by compressor hydraulic accumulation according to the present invention.
Fig. 2 is a flow chart for injecting refrigerant into a compressor shell.
FIG. 3 is a schematic diagram of a method for improving compressor damage due to compressor hydraulic buildup in accordance with the present invention.
Fig. 4 is a circuit diagram of the controller and the temperature sensor.
Fig. 5 is a circuit diagram of a power device.
Fig. 6 is a schematic diagram of the power device current flow direction.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Referring to fig. 1 to 5, the present invention provides a method for improving compressor damage caused by compressor hydraulic accumulation, comprising the following steps:
s1, determining a placement area based on the position of an air inlet;
s2, mounting a temperature sensor in the placement area;
specifically, a temperature sensor is arranged at the air suction port, and when the temperature of the air suction port is detected to be lower than a certain threshold value, the heating process of the controller is started, so that the controller works under the working condition of large torque and low rotating speed, and the liquid refrigerant is heated and gasified.
S3, injecting the refrigerant into the compressor shell;
the concrete mode is as follows;
s31, determining the injection amount of the refrigerant based on the capacity of the compressor and the air conditioning system;
and S32, injecting the refrigerant with the volume equal to the injection quantity into the compressor shell.
S4, acquiring the temperature of an air suction port of the compressor through a temperature sensor to obtain the current temperature;
s5, comparing the current temperature with a temperature threshold value to obtain a comparison result;
and S6, starting the controller to heat based on the comparison result, so that the liquid refrigerant is heated and gasified.
Specifically, when the comparison result is that the current temperature is greater than or equal to the temperature threshold, the compressor normally operates;
and when the comparison result shows that the current temperature is lower than the temperature threshold value, starting the controller to heat the compressor so as to heat and gasify the liquid refrigerant.
Specifically, when the controller MCU heats the compressor, the controller works under the working condition of large torque and low rotating speed.
The heating has two parts, one part is a power device of the controller, and the other part is the motor heating controlled by the controller.
The controller controls the motor to work under a low-speed large-torque working condition, for the motor, large torque flows large phase current for a stator (coil) of the motor, and P = I 2 * And R (I is phase current, R is internal resistance of a motor stator, and power consumption (copper consumption)) of the motor is increased, and meanwhile, the switching frequency of the controller is increased, and the harmonic wave of the motor phase current is increased, so that the power consumption of the motor is further increased. Thereby increasing the heat generation of the motor.
As shown in fig. 5 and 6, U, V, W is respectively connected to three phases of the motor, the three power transistors of the upper bridge are Q1, Q2 and Q3, and the three power transistors of the lower bridge are Q4, Q5 and Q6. Current flows from a power supply positive bus HVBUS +, passes through Q1 and Q2, flows into the motor through a U, V interface, flows out of a W phase of the motor, flows into the HVBUS-through Q6 and finally flows into a power supply negative electrode. The current flow situation at a certain moment in the actual motor operation process is described above, and there are 5 situations actually, specifically including that Q1 and Q3 enter Q5 and exit; q2 and Q3 enter and go out from Q4; q1 enters Q5 and Q6 exits; q2 enters Q4 and Q6 exits; q3 enters Q4 and Q5 exits.
For the controller: 1. the motor is controlled to work under the working condition of low speed and large torque, and the conduction power consumption of the power device is increased by P = I 2 * R (I is phase current, R is internal resistance of the power device), and the heat generation amount of the power device increases.
2. The switching frequency of the power device is improved, the switching loss of the power device is increased, and the heat productivity of the power device is increased.
The invention relates to a method for improving compressor damage caused by compressor liquid accumulation.A temperature sensor is used for acquiring the temperature of a compressor air suction port to obtain the current temperature; comparing the current temperature with a temperature threshold value to obtain a comparison result; the controller is started to heat based on the comparison result, so that the liquid refrigerant is heated and gasified.
While the present invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A method for improving compressor damage caused by compressor liquid accumulation is characterized by comprising the following steps:
acquiring the temperature of an air suction port of the compressor through a temperature sensor to obtain the current temperature;
comparing the current temperature with a temperature threshold value to obtain a comparison result;
and starting the controller to heat based on the comparison result, so that the liquid refrigerant is heated and gasified.
2. The method for improving compressor damage caused by compressor hydraulic accumulation as claimed in claim 1,
before the step of acquiring the temperature of the air suction port of the compressor through the temperature sensor to obtain the current temperature, the method further comprises the following steps:
determining a placement area based on the position of the air inlet;
mounting a temperature sensor to the placement area;
refrigerant is injected into the compressor shell.
3. The method for improving compressor damage caused by compressor hydraulic accumulation as set forth in claim 2,
the specific mode of injecting the refrigerant into the compressor shell is as follows;
determining the injection amount of the refrigerant based on the capacity of the compressor and the air conditioning system;
and injecting the refrigerant with the volume equal to the injection quantity into the compressor shell.
4. The method for improving compressor damage caused by compressor hydraulic accumulation as claimed in claim 3,
the controller is started to heat based on the comparison result, so that the specific mode of heating and gasifying the liquid refrigerant is as follows:
when the comparison result shows that the current temperature is greater than or equal to the temperature threshold value, the compressor normally operates;
and when the comparison result shows that the current temperature is lower than the temperature threshold value, starting the controller to heat the compressor so as to heat and gasify the liquid refrigerant.
5. The method for improving compressor damage caused by compressor hydraulic accumulation as claimed in claim 4,
when the controller heats the compressor, the controller works under the working condition of large torque and low rotating speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210897990.8A CN115218571A (en) | 2022-07-28 | 2022-07-28 | Method for improving compressor damage caused by compressor liquid accumulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210897990.8A CN115218571A (en) | 2022-07-28 | 2022-07-28 | Method for improving compressor damage caused by compressor liquid accumulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115218571A true CN115218571A (en) | 2022-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210897990.8A Pending CN115218571A (en) | 2022-07-28 | 2022-07-28 | Method for improving compressor damage caused by compressor liquid accumulation |
Country Status (1)
| Country | Link |
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| CN (1) | CN115218571A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000274840A (en) * | 1999-03-25 | 2000-10-06 | Mitsubishi Electric Corp | Refrigerator |
| CN101680444A (en) * | 2007-06-01 | 2010-03-24 | 三电有限公司 | Start-up control device and method for electric scroll compressor |
| CN110145900A (en) * | 2019-04-28 | 2019-08-20 | 北京君腾达制冷技术有限公司 | A kind of air-conditioning and its prevent compressor liquid impact apparatus and method |
| CN111811155A (en) * | 2020-07-27 | 2020-10-23 | 合肥天鹅制冷科技有限公司 | Device for preventing compressor from being impacted by liquid |
-
2022
- 2022-07-28 CN CN202210897990.8A patent/CN115218571A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000274840A (en) * | 1999-03-25 | 2000-10-06 | Mitsubishi Electric Corp | Refrigerator |
| CN101680444A (en) * | 2007-06-01 | 2010-03-24 | 三电有限公司 | Start-up control device and method for electric scroll compressor |
| CN110145900A (en) * | 2019-04-28 | 2019-08-20 | 北京君腾达制冷技术有限公司 | A kind of air-conditioning and its prevent compressor liquid impact apparatus and method |
| CN111811155A (en) * | 2020-07-27 | 2020-10-23 | 合肥天鹅制冷科技有限公司 | Device for preventing compressor from being impacted by liquid |
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