CN113091207A - Air return port blockage judging method and device and air conditioner - Google Patents
Air return port blockage judging method and device and air conditioner Download PDFInfo
- Publication number
- CN113091207A CN113091207A CN202110507584.1A CN202110507584A CN113091207A CN 113091207 A CN113091207 A CN 113091207A CN 202110507584 A CN202110507584 A CN 202110507584A CN 113091207 A CN113091207 A CN 113091207A
- Authority
- CN
- China
- Prior art keywords
- temperature
- compressor
- air
- outdoor unit
- preset value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
- F24F11/526—Indication arrangements, e.g. displays giving audible indications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
Landscapes
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a method and a device for judging the blockage of a return air port and an air conditioner, and relates to the technical field of air conditioners. The method for judging the blockage of the air return port comprises the following steps: controlling the air conditioner to operate in a heating mode; acquiring opening data of a heating electronic expansion valve, the suction temperature of a compressor, the outlet temperature of an outdoor unit heat exchanger and the environment temperature of an outdoor unit in real time; judging whether the outdoor unit has refrigerant accumulation according to the opening data, the air suction temperature, the outlet temperature and the environment temperature; acquiring the exhaust temperature and the working current of the compressor under the condition that the refrigerant accumulation of the external unit is judged; and judging whether the air return port of the compressor is blocked or not according to the exhaust temperature and the working current. The method for judging the blockage of the return air port can accurately judge whether the return air port of the compressor is blocked or not according to the operating parameters of the air conditioner, thereby providing an accurate maintenance direction for maintenance personnel in time and saving the maintenance cost.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method and a device for judging the blockage of a return air opening and an air conditioner.
Background
At present, when a return air port of a compressor is blocked, the condition that the compressor is not disassembled is difficult to judge by maintenance personnel, so that overhigh maintenance cost is caused.
Disclosure of Invention
The problem solved by the invention is that the blockage fault of the air return port of the compressor of the multi-split air conditioner is difficult to be identified by maintenance personnel.
In order to solve the above problems, the present invention provides a method for determining whether a return air port is blocked, which can automatically and accurately determine whether the return air port of a compressor is blocked.
The embodiment of the invention provides a method for judging the blockage of a return air opening, which is applied to an air conditioner and comprises the following steps:
controlling the air conditioner to operate in a heating mode;
acquiring opening data of a heating electronic expansion valve, the suction temperature of a compressor, the outlet temperature of an outdoor unit heat exchanger and the environment temperature of an outdoor unit in real time;
judging whether the outdoor unit has refrigerant accumulation according to the opening data, the air suction temperature, the outlet temperature and the environment temperature;
acquiring the exhaust temperature and the working current of the compressor under the condition that the outdoor unit is judged to generate refrigerant accumulation;
and judging whether the air return port of the compressor is blocked or not according to the exhaust temperature and the working current.
According to the method for judging the blockage of the air return port, provided by the embodiment of the invention, the opening data of the heating electronic expansion valve, the suction temperature of the compressor, the outlet temperature of the heat exchanger of the outdoor unit and the environment temperature of the outdoor unit under the operation of the heating mode of the controller are obtained, whether the outdoor unit generates refrigerant accumulation is judged according to the opening data, the suction temperature, the outlet temperature and the environment temperature, further, under the condition that the outdoor unit generates the refrigerant accumulation is judged, the exhaust temperature and the working current of the compressor are obtained, and whether the air return port of the compressor is blocked is judged according to the exhaust temperature and the working current. According to the method for judging the blockage of the return air port, automatic judgment is carried out through the self operation parameters of the air conditioner, and the blockage of the return air port of the air conditioner compressor is accurately identified, so that an accurate maintenance direction can be timely provided for maintenance personnel, and the maintenance cost is saved.
In an optional embodiment, the determining whether the outdoor unit has a refrigerant accumulation according to the opening data, the suction temperature, the outlet temperature, and the ambient temperature includes:
and in a preset time period, judging that the outdoor unit accumulates a refrigerant under the conditions that the opening data is smaller than or equal to a first preset value, the difference between the suction temperature and the saturation temperature corresponding to the current low-pressure is smaller than a second preset value, the difference between the outlet temperature and the saturation temperature is smaller than a third preset value, the difference between the suction temperature and the outlet temperature is smaller than a fourth preset value, and the difference between the ambient temperature and the saturation temperature is smaller than a fifth preset value.
In an optional embodiment, the step of determining whether a back air port of the compressor is blocked according to the exhaust temperature and the operating current comprises:
and under the condition that the exhaust temperature is greater than a sixth preset value and the difference value between the working current and the normal current of the current frequency of the compressor is less than a seventh preset value, judging that the air return port of the compressor is blocked.
In an optional embodiment, after the step of determining whether the outdoor unit has a refrigerant accumulation according to the opening degree data, the intake air temperature, the outlet temperature, and the ambient temperature, the method further includes:
and under the condition that the external unit is judged not to generate the refrigerant accumulation, the subsequent steps are circulated by the step of acquiring the opening data of the heating electronic expansion valve, the suction temperature of the compressor, the outlet temperature of the external unit heat exchanger and the environment temperature of the external unit in real time.
In an optional embodiment, after the step of determining whether the back air port of the compressor is blocked according to the exhaust temperature and the operating current, the back air port blockage determining method further includes:
and under the condition that the air return port of the compressor is judged to be blocked for the first time, starting from the step of judging whether the outdoor unit has the refrigerant accumulation according to the opening data, the suction temperature, the outlet temperature and the environment temperature, circulating the subsequent steps, and controlling the air conditioner to stop until the air return port of the compressor is judged to be blocked for N times continuously, wherein N is more than or equal to 2.
In an optional embodiment, after the step of determining whether the back air port of the compressor is blocked according to the exhaust temperature and the operating current, the back air port blockage determining method further includes:
and under the condition that the air return port of the compressor is judged not to be blocked, starting from the step of judging whether the outer unit has the refrigerant accumulation according to the opening data, the suction temperature, the outlet temperature and the environment temperature, and circulating the subsequent steps.
The embodiment of the invention provides a return air opening blockage judging device which is applied to an air conditioner, and the return air opening blockage judging device comprises:
the control module is used for controlling the air conditioner to operate in a heating mode;
the first acquisition module is used for acquiring opening data of the heating electronic expansion valve, the suction temperature of the compressor, the outlet temperature of an outdoor unit heat exchanger and the environment temperature of an outdoor unit in real time;
the first judging module is used for judging whether the outdoor unit has refrigerant accumulation according to the opening data, the air suction temperature, the outlet temperature and the environment temperature;
the second acquisition module is used for acquiring the exhaust temperature and the working current of the compressor under the condition that the outdoor unit is judged to generate the refrigerant accumulation;
and the second judgment module is used for judging whether the air return port of the compressor is blocked or not according to the exhaust temperature and the working current.
In an optional embodiment, the first determining module is further configured to determine that the outdoor unit has refrigerant accumulation under the condition that, within a preset time period, the opening data is equal to a first preset value, a difference between the suction temperature and a saturation temperature corresponding to the current low-pressure is smaller than a second preset value, a difference between the outlet temperature and the saturation temperature is smaller than a third preset value, a difference between the suction temperature and the outlet temperature is smaller than a fourth preset value, and a difference between the ambient temperature and the saturation temperature is smaller than a fifth preset value.
In an optional embodiment, the second determination module is further configured to determine that a gas return port of the compressor is blocked when the exhaust temperature is greater than a sixth preset value and a difference between the operating current and a normal current of a current frequency of the compressor is less than a seventh preset value.
The embodiment of the present invention further provides an air conditioner, which includes a controller, wherein the controller is configured to execute the method for determining the blockage of the return air inlet, and the method for determining the blockage of the return air inlet includes: controlling the air conditioner to operate in a heating mode; acquiring opening data of a heating electronic expansion valve, the suction temperature of a compressor, the outlet temperature of an outdoor unit heat exchanger and the environment temperature of an outdoor unit in real time; judging whether the outdoor unit has refrigerant accumulation according to the opening data, the air suction temperature, the outlet temperature and the environment temperature; acquiring the exhaust temperature and the working current of the compressor under the condition that the outdoor unit is judged to generate refrigerant accumulation; and judging whether the air return port of the compressor is blocked or not according to the exhaust temperature and the working current.
Drawings
Fig. 1 is a block flow diagram of a method for determining the blockage of a return air port according to an embodiment of the present invention;
FIG. 2 is a block diagram of a sub-step of step S103 in FIG. 1;
FIG. 3 is a block diagram of a sub-step of step S106 in FIG. 1;
fig. 4 is a block diagram of a return air opening blockage determination device according to an embodiment of the present invention.
Description of reference numerals:
100-a back air opening blockage judging device; 110-a control module; 120-a first acquisition module; 130-a first decision module; 140-a second acquisition module; 150-a second decision module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 1, fig. 1 is a block diagram illustrating a flow chart of a method for determining the blockage of a return air inlet according to the present embodiment. The air return port blockage judging method is applied to the air conditioner, automatic judgment is carried out through self operation parameters of the air conditioner, blockage of the air return port of the compressor of the air conditioner is accurately identified, and therefore accurate maintenance directions can be timely provided for maintenance personnel, and maintenance cost is saved. The method for judging the blockage of the return air port provided by the embodiment comprises the following steps:
and step S101, controlling the air conditioner to operate in a heating mode.
In this embodiment, when receiving a detection instruction sent by a user, a controller of the air conditioner controls the air conditioner to start and operate in a heating mode, and continues to execute subsequent steps. In other embodiments, it may also be set that when the air conditioner operates in the heating mode, the controller automatically performs the subsequent steps to realize the fully automatic detection.
Further, the method for judging the blockage of the return air port can further comprise the following steps:
and step S102, acquiring opening data of the heating electronic expansion valve, the suction temperature of the compressor, the outlet temperature of the outdoor unit heat exchanger and the environment temperature of the outdoor unit in real time.
After controlling the air conditioner to operate in a heating mode, the controller acquires opening data of the heating electronic expansion valve, suction temperature of the compressor, outlet temperature of the outer unit heat exchanger and environment temperature of the outer unit in real time. In the embodiment, the controller is electrically connected with the heating electronic expansion valve and directly reads the opening data of the heating electronic expansion valve; the controller is electrically connected with a temperature sensor arranged at an air suction port of the compressor, and receives detection data fed back by the temperature sensor to obtain air suction temperature; the controller is electrically connected with a temperature sensor arranged at the outlet of the outer machine heat exchanger, and receives detection data fed back by the temperature sensor to obtain outlet temperature; the controller is electrically connected with a temperature sensor arranged in the environment where the outdoor unit is located, and receives detection data fed back by the temperature sensor to obtain the environment temperature.
Further, the method for judging the blockage of the return air port can further comprise the following steps:
and step S103, judging whether the refrigerant accumulation occurs in the external unit or not according to the opening data, the air suction temperature, the outlet temperature and the environment temperature.
Referring to fig. 2, fig. 2 is a block diagram illustrating a sub-step flow of step S103, wherein step S103 includes:
and step S1031, in a preset time period, the opening data is smaller than or equal to a first preset value, the difference value between the suction temperature and the saturation temperature corresponding to the current low-pressure is smaller than a second preset value, the difference value between the outlet temperature and the saturation temperature is smaller than a third preset value, the difference value between the suction temperature and the outlet temperature is smaller than a fourth preset value, and the difference value between the ambient temperature and the saturation temperature is smaller than a fifth preset value, the occurrence of refrigerant accumulation of the outdoor unit is judged.
The setting range of the first preset value is 0pls to 120pls, preferably 60pls in this embodiment; the setting range of the second preset value is-3 ℃ to 3 ℃, and 0 ℃ is preferred in the embodiment; the setting range of the third preset value is-3 ℃ to 3 ℃, and 0 ℃ is preferred in the embodiment; the setting range of the fourth preset value is-2 ℃ to 3 ℃, and the 2 ℃ is preferred in the embodiment; the fifth preset value is set to a range of 0 ℃ to 8 ℃, and preferably 5 ℃ in the present embodiment.
Therefore, if the opening data of the heating expansion valve is less than or equal to 60pls within the preset time period, the difference between the suction temperature and the saturation temperature corresponding to the current low-pressure is less than 0 ℃, the difference between the outlet temperature and the saturation temperature is less than 0 ℃, the difference between the suction temperature and the outlet temperature is less than 2 ℃, and the difference between the ambient temperature and the saturation temperature is less than 5 ℃, it is determined that the refrigerant accumulation occurs in the outdoor unit.
In the heating mode, the air suction port of the compressor and the outlet of the outer machine heat exchanger are both positioned on the low-pressure side, and under the normal condition, the heating electronic expansion valve can control the circulation quantity of the outer machine refrigerant by adjusting the opening degree, so that the liquid return on the low-pressure side is prevented. When the opening degree of the heating expansion valve is smaller than or equal to the first preset value of 60pls, the suction superheat degree (the difference between the suction temperature and the saturation temperature) is still small, the superheat degree (the difference between the outlet temperature and the saturation temperature) is still small, and the temperature difference between the gas distribution inlet and the gas distribution outlet is small, so that a large amount of refrigerants are accumulated on the low-pressure side of the heat exchanger, the gas distribution and the like of the outdoor unit, and the occurrence of the refrigerant accumulation of the outdoor unit is judged.
With reference to fig. 1, the method for determining the blockage of the return air port may further include:
and step S104, under the condition that the outdoor unit is judged not to have refrigerant accumulation, the method starts from the step of acquiring opening data of the heating electronic expansion valve, the suction temperature of the compressor, the outlet temperature of the outdoor unit heat exchanger and the environment temperature of the outdoor unit in real time, and circulates the subsequent steps.
If the opening degree data, the intake air temperature, the outlet temperature, and the ambient temperature do not satisfy the determination condition in the above-described substep S1031, it is determined that no refrigerant accumulation occurs in the outdoor unit.
At this time, the opening data of the heating electronic expansion valve, the suction temperature of the compressor, the outlet temperature of the outer unit heat exchanger and the environment temperature of the outer unit are continuously obtained in real time and continuously judged.
Further, the method for judging the blockage of the return air port can further comprise the following steps:
in step S105, when it is determined that the external unit has a refrigerant accumulation, the discharge temperature and the operating current of the compressor are acquired.
The refrigerant accumulation of the external machine can be caused by two conditions, one is that the refrigerant cannot circulate in the external machine, and the other is that the refrigerant cannot evaporate in time. The specific situation also needs to be judged by the operation parameters of the compressor.
Further, the method for judging the blockage of the return air port can further comprise the following steps:
and step S106, judging whether the air return port of the compressor is blocked or not according to the exhaust temperature and the working current.
Referring to fig. 3, fig. 3 is a block diagram illustrating a sub-step flow of step S106, wherein step S106 includes:
and a substep S1061, determining that the air return port of the compressor is blocked under the condition that the exhaust temperature is greater than a sixth preset value and the difference value between the working current and the normal current of the current frequency of the compressor is less than a seventh preset value.
The setting range of the sixth preset value is 110-130 ℃, and the preferred temperature of the embodiment is 120 ℃; the setting range of the seventh preset value is 0A to 2A, and 1A is preferable in the present embodiment.
Therefore, when the refrigerant accumulation occurs in the external machine, the exhaust temperature of the compressor is more than 120 ℃, and the difference value between the working current of the compressor and the normal current of the current frequency of the compressor is less than 1A, the blockage of the air return port of the compressor is judged. If the refrigerant is not evaporated in time, the discharge temperature of the compressor should not be too high, and therefore, the refrigerant cannot circulate. For the compressor, under different frequency and pressure conditions, a more stable current range exists. The normal working current indicates that the compressor is not worn, and the high exhaust temperature indicates that the refrigerant circulation quantity is small. The low-pressure side refrigerant is more, but the circulating refrigerant quantity of the compressor is less, and the return air port of the compressor is blocked by comprehensive judgment.
In practice, step S106 further includes the substeps of obtaining the operating frequency of the compressor and obtaining the normal current according to the operating frequency. In practical application, the numerical value of the normal current corresponding to the working frequency can be directly read by recording factory parameters of the compressor in advance.
With reference to fig. 1, the method for determining the blockage of the return air port may further include:
step S107, when it is determined that the back air port of the compressor is not blocked, starts with a step of determining whether the refrigerant accumulation occurs in the external unit based on the opening degree data, the suction temperature, the outlet temperature, and the ambient temperature, and circulates the subsequent steps.
If the exhaust temperature and the operating current do not satisfy the determination condition of the above sub-step S1061, it is determined that the back air port of the compressor is not blocked. In this case, the process returns to step S102, and continues to the subsequent steps to perform continuous detection determination.
Further, the method for judging the blockage of the return air port can further comprise the following steps:
and S108, under the condition that the air return port of the compressor is judged to be blocked for the first time, starting from the step of judging whether the outer unit generates the refrigerant accumulation according to the opening data, the suction temperature, the outlet temperature and the ambient temperature, circulating the subsequent steps until the air return port of the compressor is judged to be blocked for N times continuously, and controlling the air conditioner to stop.
In the continuous judgment process, when the air return port is judged to be blocked for the first time, the step returns to the step S102, and the subsequent steps are continued to carry out continuous detection judgment.
N is greater than or equal to 2, and in this embodiment, N is 3. Including judging that the return air port takes place to block up for the first time, under the condition that 3 continuous times judge that the return air port of compressor takes place to block up, control the air conditioner and shut down to control the air conditioner and send alarm signal, take place the return air port and block up the trouble in order to remind maintenance personal.
In summary, the method for determining whether the back air port is blocked according to the present embodiment automatically and accurately determines whether the back air port of the compressor is blocked through steps S101 to S108.
Referring to fig. 4, fig. 4 is a block diagram illustrating a structure of the device 100 for determining the blockage of the air return opening according to the present embodiment. This stifled judgement device 100 of return air port leads to is applied to the air conditioner, carries out automatic judgement through the self operating parameter of air conditioner, and accurate discernment air conditioner compressor return air port takes place to block up to can in time provide accurate maintenance direction to the maintenance personal, save cost of maintenance.
The device 100 for determining blocking of a return air inlet according to the present embodiment includes a control module 110, a first obtaining module 120, a first determining module 130, a second obtaining module 140, and a second determining module 150.
The control module 110 is used to control the air conditioner to operate in a heating mode.
The control module 110 is configured to execute the step S101 of the above-mentioned method for determining the blockage of the air return port, in this embodiment, when the controller of the air conditioner receives a detection instruction sent by a user, the control module 110 controls the air conditioner to start and operate in a heating mode. In other embodiments, it may also be set that when the air conditioner operates in the heating mode, the controller automatically performs the subsequent steps to realize the fully automatic detection.
The first obtaining module 120 is configured to obtain opening data of the heating electronic expansion valve, a suction temperature of the compressor, an outlet temperature of an outdoor unit heat exchanger, and an environment temperature of the outdoor unit in real time.
The first obtaining module 120 is used for executing steps S102, S104, S107 and S108 of the above-mentioned air return opening blockage determining method. In this embodiment, the first obtaining module 120 is electrically connected to the heating electronic expansion valve, and directly reads the opening data of the heating electronic expansion valve; the first obtaining module 120 is electrically connected with a temperature sensor arranged at an air suction port of the compressor, and receives detection data fed back by the temperature sensor to obtain air suction temperature; the first obtaining module 120 is electrically connected with a temperature sensor arranged at an outlet of the outer machine heat exchanger, and receives detection data fed back by the temperature sensor to obtain outlet temperature; the first obtaining module 120 is electrically connected to a temperature sensor disposed in an environment where the external unit is located, and receives detection data fed back by the temperature sensor to obtain an environment temperature.
The first determination module 130 is configured to determine whether the refrigerant accumulation occurs in the outdoor unit according to the opening data, the suction temperature, the outlet temperature, and the ambient temperature.
The first determining module 130 is used for executing step S103 of the above-mentioned method for determining the blockage of the air return opening, and sub-step S1031 of step S103. That is, the first determining module 130 is further configured to determine that the external unit accumulates the refrigerant under the condition that, within a preset time period, the opening data is smaller than or equal to a first preset value, a difference between the suction temperature and the saturation temperature corresponding to the current low-pressure is smaller than a second preset value, a difference between the outlet temperature and the saturation temperature is smaller than a third preset value, a difference between the suction temperature and the outlet temperature is smaller than a fourth preset value, and a difference between the ambient temperature and the saturation temperature is smaller than a fifth preset value.
The second obtaining module 140 is configured to obtain an exhaust temperature and an operating current of the compressor when it is determined that the external unit has a refrigerant accumulation.
The second obtaining module 140 is used for executing the step S105 of the above-mentioned air return opening blockage judging method.
The second determination module 150 is configured to determine whether a return air port of the compressor is blocked according to the exhaust temperature and the operating current.
The second determining module 150 is configured to execute step S106 of the above-mentioned method for determining blocking of the return air port, and sub-step S1061 of step S106, that is, the second determining module 150 is further configured to determine that the return air port of the compressor is blocked when the exhaust temperature is greater than a sixth preset value, and a difference between the working current and a normal current of a current frequency of the compressor is less than a seventh preset value.
To sum up, the device 100 for judging whether the air return port is blocked can automatically judge through the self operating parameters of the air conditioner and accurately identify the blockage of the air return port of the compressor of the air conditioner, so that the accurate maintenance direction can be timely provided for maintenance personnel, and the maintenance cost is saved.
The present embodiment further provides an air conditioner, which includes a controller for executing the above-mentioned method for determining blockage of the air return port from step S101 to step S108.
The air return port can be automatically judged according to the self-running parameters of the air conditioner through the judgment method, and the blockage of the air return port of the compressor of the air conditioner can be accurately identified, so that the accurate maintenance direction can be timely provided for maintenance personnel, and the maintenance cost is saved. Therefore, the air conditioner provided by the embodiment can automatically and accurately identify the blockage fault of the return air port of the compressor.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method for judging the blockage of a return air port is applied to an air conditioner and is characterized by comprising the following steps:
controlling the air conditioner to operate in a heating mode;
acquiring opening data of a heating electronic expansion valve, the suction temperature of a compressor, the outlet temperature of an outdoor unit heat exchanger and the environment temperature of an outdoor unit in real time;
judging whether the outdoor unit has refrigerant accumulation according to the opening data, the air suction temperature, the outlet temperature and the environment temperature;
acquiring the exhaust temperature and the working current of the compressor under the condition that the outdoor unit is judged to generate refrigerant accumulation;
and judging whether the air return port of the compressor is blocked or not according to the exhaust temperature and the working current.
2. A method for determining whether or not refrigerant accumulates in the outdoor unit on the basis of the opening degree data, the intake air temperature, the outlet temperature, and the ambient temperature, according to claim 1, comprising:
and in a preset time period, judging that the outdoor unit accumulates a refrigerant under the conditions that the opening data is smaller than or equal to a first preset value, the difference between the suction temperature and the saturation temperature corresponding to the current low-pressure is smaller than a second preset value, the difference between the outlet temperature and the saturation temperature is smaller than a third preset value, the difference between the suction temperature and the outlet temperature is smaller than a fourth preset value, and the difference between the ambient temperature and the saturation temperature is smaller than a fifth preset value.
3. A method as claimed in claim 1, wherein said step of determining whether a back-air port of the compressor is blocked according to the exhaust temperature and the operating current comprises:
and under the condition that the exhaust temperature is greater than a sixth preset value and the difference value between the working current and the normal current of the current frequency of the compressor is less than a seventh preset value, judging that the air return port of the compressor is blocked.
4. A method for determining whether or not refrigerant accumulates in the outdoor unit according to the opening degree data, the intake air temperature, the outlet temperature, and the ambient temperature, further comprising, after the step of determining whether or not refrigerant accumulation occurs in the outdoor unit according to the opening degree data, the intake air temperature, the outlet temperature, and the ambient temperature:
and under the condition that the external unit is judged not to generate the refrigerant accumulation, the subsequent steps are circulated by the step of acquiring the opening data of the heating electronic expansion valve, the suction temperature of the compressor, the outlet temperature of the external unit heat exchanger and the environment temperature of the external unit in real time.
5. A method for determining whether a return port of a compressor is blocked according to claim 1, wherein the method for determining whether the return port of the compressor is blocked according to the exhaust temperature and the operating current further comprises:
and under the condition that the air return port of the compressor is judged to be blocked for the first time, starting from the step of judging whether the outdoor unit has the refrigerant accumulation according to the opening data, the suction temperature, the outlet temperature and the environment temperature, circulating the subsequent steps, and controlling the air conditioner to stop until the air return port of the compressor is judged to be blocked for N times continuously, wherein N is more than or equal to 2.
6. A method for determining whether a return port of a compressor is blocked according to claim 1, wherein the method for determining whether the return port of the compressor is blocked according to the exhaust temperature and the operating current further comprises:
and under the condition that the air return port of the compressor is judged not to be blocked, starting from the step of judging whether the outer unit has the refrigerant accumulation according to the opening data, the suction temperature, the outlet temperature and the environment temperature, and circulating the subsequent steps.
7. A return air port blockage judging device applied to an air conditioner is characterized in that the return air port blockage judging device (100) comprises:
a control module (110) for controlling the air conditioner to operate in a heating mode;
the first acquisition module (120) is used for acquiring opening data of the heating electronic expansion valve, the suction temperature of the compressor, the outlet temperature of the outdoor unit heat exchanger and the environment temperature of the outdoor unit in real time;
the first judging module (130) is used for judging whether the outdoor unit generates refrigerant accumulation according to the opening data, the air suction temperature, the outlet temperature and the environment temperature;
a second obtaining module (140) for obtaining the exhaust temperature and the working current of the compressor when the outdoor unit is judged to generate the refrigerant accumulation;
and the second judgment module (150) is used for judging whether the return air port of the compressor is blocked or not according to the exhaust temperature and the working current.
8. The device for determining the blockage of the return air inlet according to claim 7, wherein the first determining module (130) is further configured to determine that the outdoor unit has refrigerant accumulation when the opening data is equal to a first preset value, a difference between the suction temperature and a saturation temperature corresponding to a current low pressure is smaller than a second preset value, a difference between the outlet temperature and the saturation temperature is smaller than a third preset value, a difference between the suction temperature and the outlet temperature is smaller than a fourth preset value, and a difference between the ambient temperature and the saturation temperature is smaller than a fifth preset value within a preset time period.
9. The return air port blockage judging device according to claim 7, wherein the second judging module (150) is further configured to judge that the return air port of the compressor is blocked if the exhaust temperature is greater than a sixth preset value and the difference between the working current and the normal current of the current frequency of the compressor is less than a seventh preset value.
10. An air conditioner characterized by comprising a controller for executing the method for determining blocking of a return air opening according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110507584.1A CN113091207B (en) | 2021-05-10 | 2021-05-10 | Air return port blockage judging method and device and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110507584.1A CN113091207B (en) | 2021-05-10 | 2021-05-10 | Air return port blockage judging method and device and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113091207A true CN113091207A (en) | 2021-07-09 |
| CN113091207B CN113091207B (en) | 2022-03-29 |
Family
ID=76664848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110507584.1A Active CN113091207B (en) | 2021-05-10 | 2021-05-10 | Air return port blockage judging method and device and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113091207B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115523610A (en) * | 2022-08-30 | 2022-12-27 | 宁波奥克斯电气股份有限公司 | Multi-split air conditioner blockage control method and device and multi-split air conditioner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065249A (en) * | 2015-08-31 | 2015-11-18 | 珠海格力电器股份有限公司 | Compressor performance detection device, air conditioning system with same and control method |
| CN106766001A (en) * | 2017-02-04 | 2017-05-31 | 青岛海尔空调器有限总公司 | A kind of control method of air-conditioning, device and air-conditioning |
| JP2021008831A (en) * | 2019-06-28 | 2021-01-28 | アイシン精機株式会社 | Maintenance timing calculating device of ignition plug of heat pump engine and maintenance timing calculating method of ignition plug of heat pump engine |
-
2021
- 2021-05-10 CN CN202110507584.1A patent/CN113091207B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065249A (en) * | 2015-08-31 | 2015-11-18 | 珠海格力电器股份有限公司 | Compressor performance detection device, air conditioning system with same and control method |
| CN106766001A (en) * | 2017-02-04 | 2017-05-31 | 青岛海尔空调器有限总公司 | A kind of control method of air-conditioning, device and air-conditioning |
| JP2021008831A (en) * | 2019-06-28 | 2021-01-28 | アイシン精機株式会社 | Maintenance timing calculating device of ignition plug of heat pump engine and maintenance timing calculating method of ignition plug of heat pump engine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115523610A (en) * | 2022-08-30 | 2022-12-27 | 宁波奥克斯电气股份有限公司 | Multi-split air conditioner blockage control method and device and multi-split air conditioner |
| CN115523610B (en) * | 2022-08-30 | 2024-06-14 | 宁波奥克斯电气股份有限公司 | Multi-split blocking control method and device and multi-split |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113091207B (en) | 2022-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103807970B (en) | control method and device for air conditioner | |
| CN107084494B (en) | Fault detection method and device for electronic expansion valve and multi-connected air conditioning system | |
| CN110579010B (en) | Control method and control device for electronic expansion valve of multi-split internal machine and air conditioner | |
| CN107152822B (en) | Control method, air conditioner and the storage medium of outdoor unit | |
| CN111076353A (en) | Electronic expansion valve opening control method and device and air conditioner | |
| CN107894047B (en) | Machine room air conditioner refrigerating system and humidity control method thereof | |
| CN112628984B (en) | Control method and device for electronic expansion valve of air conditioner internal unit and air conditioner | |
| CN106801972B (en) | A kind of transducer air conditioning protection control method and transducer air conditioning | |
| CN112506254B (en) | Cold plate temperature control method and device, electronic equipment and computer readable medium | |
| CN110762673A (en) | Cold water air conditioning system, anti-freezing control method thereof, storage medium and computer equipment | |
| CN110542234B (en) | Air conditioner, operation control method and device thereof and computer readable storage medium | |
| US20120117995A1 (en) | Energy Saving Device And Method For Cooling And Heating Apparatus | |
| CN113091207B (en) | Air return port blockage judging method and device and air conditioner | |
| US11982487B2 (en) | Defrosting control method, central controller and heating system | |
| CN112344510A (en) | Compressor cooling control method for air conditioning unit | |
| CN111380184A (en) | Compressor operation control method and device and heat exchange system | |
| JP5677198B2 (en) | Air cooling heat pump chiller | |
| CN111412624A (en) | Air conditioning unit and compressor frequency control method thereof | |
| CN108692425B (en) | Defrosting control method for air conditioner | |
| CN111121152B (en) | Multi-connected outdoor unit and fresh air fan mixed connection system and control method thereof | |
| CN115200163A (en) | Air conditioner control method and device and air conditioner | |
| CN113950599B (en) | Device management apparatus, heat source system, management apparatus, and device management system | |
| CN116964387A (en) | Method, computer program product and system for monitoring a heat pump | |
| CN111121153B (en) | Multi-connected indoor unit and fresh air fan hybrid system and control method thereof | |
| CN112212473A (en) | Refrigeration control method of fixed-frequency air conditioner under high-temperature working condition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221014 Address after: 315191 No. 1166 Mingguang North Road, Jiangshan Town, Ningbo, Zhejiang, Yinzhou District Patentee after: NINGBO AUX ELECTRIC Co.,Ltd. Patentee after: AUX AIR CONDITIONING LIMITED BY SHARE Ltd. Address before: 315000 No.1166 Mingguang North Road, Jiangshan Town, Yinzhou District, Ningbo City, Zhejiang Province Patentee before: NINGBO AUX ELECTRIC Co.,Ltd. Patentee before: Ningbo Oxfam intelligent commercial air conditioning manufacturing Co.,Ltd. |
|
| TR01 | Transfer of patent right |