CN112032919A - Refrigerant cooling and condensation preventing control method for air conditioner variable frequency drive board - Google Patents
Refrigerant cooling and condensation preventing control method for air conditioner variable frequency drive board Download PDFInfo
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- CN112032919A CN112032919A CN202010947120.8A CN202010947120A CN112032919A CN 112032919 A CN112032919 A CN 112032919A CN 202010947120 A CN202010947120 A CN 202010947120A CN 112032919 A CN112032919 A CN 112032919A
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- 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
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- 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
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- 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
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- 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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- 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
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention relates to a variable frequency air conditioner technology, and discloses a control method for cooling and condensation prevention of a refrigerant of a variable frequency drive board of an air conditioner, which solves the problem of condensation generated during cooling of the refrigerant of the variable frequency drive board and improves the reliability of electric control. According to the invention, whether the electronic expansion valve is controlled according to the condensation prevention is determined according to the difference value between the temperature of the radiating pipe of the refrigerant pipe and the internal temperature of the variable frequency drive board, so that the temperature of the radiating pipe of the refrigerant is higher than the dew point temperature of the variable frequency drive board, the generation of condensation water is prevented, and the reliability of the product is ensured. The scheme of the invention is suitable for the condensation prevention control of the variable frequency air conditioner.
Description
Technical Field
The invention relates to a variable frequency air conditioner technology, in particular to a method for controlling cooling and condensation prevention of a refrigerant of a variable frequency drive board of an air conditioner.
Background
At present, the refrigerant heat dissipation electronic control variable frequency drive board is adopted in an air conditioner, the refrigerant can reduce the temperature of components of the variable frequency drive board, and the heat dissipation protection effect is achieved, but the electronic expansion valve is closed down according to the control of the exhaust temperature by the original single throttling device of the system, the throttling is large, the temperature of the refrigerant heat dissipation pipe after the throttling is lower than the dew point temperature of the variable frequency drive board, the condensate water is generated at the position, and the electronic control reliability is influenced.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method for controlling cooling and condensation prevention of the refrigerant of the variable frequency drive board of the air conditioner solves the problem that condensation is generated during cooling of the refrigerant of the variable frequency drive board, and improves the reliability of electric control.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a control method for cooling and condensation prevention of a refrigerant of an air conditioner variable frequency drive board is applied to a system in which throttling devices are arranged at the front and the back of a refrigerant radiating pipe, wherein each throttling device comprises an electronic expansion valve, and the installation positions of the electronic expansion valves meet the following requirements: the electronic expansion valve is used as a first throttling device during heating, and the electronic expansion valve is used as a second throttling device during refrigerating;
the control method comprises the following steps:
A. determining a control mode of the electronic expansion valve according to the current operation mode of the air conditioning unit, if the current operation mode is a refrigeration mode, because the temperature of the cooling pipe of the refrigerant is higher than the dew point temperature, no condensed water is generated, and only the electronic expansion valve is required to be adjusted according to the refrigeration mode; if the current mode is the heating mode, entering the step B;
B. and acquiring the temperature T1 of the refrigerant radiating pipe after the first throttling and the internal temperature T2 of the variable frequency drive board, calculating a difference value T between T1 and T2, and judging whether the variable frequency drive board needs to enter anti-condensation control according to the difference value T.
As a further optimization, in step B, comparing the difference value t with a preset temperature value, and determining whether to enter the variable frequency drive board for condensation prevention control, specifically including:
(1) judging the relation between the difference t and preset temperature thresholds F1 and F2, and entering the step (2) if the difference t is less than or equal to F1; if the difference t is more than F1 and less than or equal to F2, entering the step (3); if the difference t is larger than F2, entering the step (4); the temperature threshold F1 is less than F2;
(2) when the difference t is less than or equal to F1, the control mode of the electronic expansion valve according to the heating mode is still adopted without entering the condensation prevention control of the variable frequency drive plate;
(3) when the difference t is more than F1 and less than or equal to F2, controlling anti-condensation according to the variable frequency drive board, and if the difference t is less than or equal to F1 in the anti-condensation control process, quitting the anti-condensation control, and returning to the step (1);
(4) and when the difference value t is larger than F2, controlling condensation prevention according to the variable frequency drive plate, simultaneously displaying condensation faults of the variable frequency drive plate, and if the condensation fault stop condition is met, controlling the unit to stop and ending the process.
As a further optimization, the dew fault shutdown conditions are as follows: three gel failures occurred within one hour.
As a further optimization, the condensation prevention control according to the variable frequency drive board comprises: the temperature of the refrigerant heat-radiating pipe is increased by adjusting the opening degree of the electronic expansion valve, and the opening degree of the electronic expansion valve is adjusted to different degrees when the current difference value t is in different temperature ranges.
As a further optimization, step (4) further comprises: and (3) if the difference t satisfies F1 and is more than the difference t and less than or equal to F2 in the anti-condensation control, exiting the anti-condensation control and returning to the step (1) if the difference t satisfies t and is less than or equal to F1.
In addition, the invention also provides a cooling and anti-condensation control method for the refrigerant of the air-conditioning variable-frequency drive board of another air-conditioning heat exchange system, which is applied to a system in which throttling devices are arranged at the front and the rear of a refrigerant radiating pipe, wherein the throttling devices comprise electronic expansion valves, and the installation positions of the electronic expansion valves meet the following requirements: the electronic expansion valve is used as a first throttling device during refrigeration, and the electronic expansion valve is used as a second throttling device during heating;
the control method comprises the following steps:
A. determining a control mode of the electronic expansion valve according to the current operation mode of the air conditioning unit, if the current operation mode is a heating mode, because the temperature of the refrigerant radiating pipe is higher than the dew point temperature, no condensed water is generated, and only the electronic expansion valve is required to be adjusted according to the heating mode; if the current mode is the refrigeration mode, entering the step B;
B. and acquiring the temperature T1 of the refrigerant radiating pipe after the first throttling and the internal temperature T2 of the variable frequency drive board, calculating a difference value T between T1 and T2, and judging whether the variable frequency drive board needs to enter anti-condensation control according to the difference value T.
The invention has the beneficial effects that:
whether condensation control needs to be carried out on a driving plate or not is judged according to a difference value between the temperature of a refrigerant radiating pipe subjected to primary throttling and the internal temperature of a variable frequency driving plate, if the difference value is smaller than a lower threshold value, the risk of condensation is judged to be small, the performance of an air conditioner is not influenced, at the moment, condensation control does not need to be carried out, if the difference value is between a smaller threshold value and a larger threshold value, the risk of condensation is judged to be large, condensation control needs to be carried out, if the difference value is larger than the larger threshold value, condensation faults are judged to possibly occur, condensation fault prompt is carried out while condensation control is carried out, and when a condensation fault shutdown condition is met, a control unit is shut down. Through the control mode, the condensation prevention control can be timely carried out under the influence of the reduction on the heat exchange performance of the unit, so that the temperature of the refrigerant radiating pipe is higher than the dew point temperature of the frequency conversion driving plate, the condensation water is prevented from being produced, and the electric control reliability of the product is improved.
Drawings
FIG. 1 is a logic control schematic diagram of an inverter air conditioning system according to embodiment 1 of the present invention;
FIG. 2 is a logic control schematic diagram of an inverter air conditioning system in embodiment 2 of the invention;
FIG. 3 is a flowchart of a first control scheme of embodiment 1;
FIG. 4 is a flowchart of a second control scheme of embodiment 1;
FIG. 5 is a flowchart of a third control scheme of embodiment 1;
FIG. 6 is a flowchart of a first control scheme of embodiment 2;
FIG. 7 is a flowchart of a second control scheme of embodiment 2;
FIG. 8 is a flowchart of a third control scheme of embodiment 2.
Detailed Description
The invention aims to provide a control method for preventing condensation during cooling of a refrigerant of a variable frequency drive board of an air conditioner, which solves the problem of condensation generated during cooling of the refrigerant of the variable frequency drive board and improves the reliability of electric control. According to the invention, whether the electronic expansion valve is controlled according to the condensation prevention is determined according to the difference value between the temperature of the radiating pipe of the refrigerant pipe and the internal temperature of the variable frequency drive board, so that the temperature of the radiating pipe of the refrigerant is higher than the dew point temperature of the variable frequency drive board, the generation of condensation water is prevented, and the reliability of the product is ensured.
The scheme of the invention is further described by combining the drawings and the embodiment.
Example 1:
the cooling and condensation prevention control method for the refrigerant of the air conditioner variable frequency drive board in the embodiment is applied to a system in which throttling devices are arranged at the front and the rear of a refrigerant radiating pipe, wherein each throttling device comprises an electronic expansion valve, and the installation positions of the electronic expansion valves meet the following requirements: the electronic expansion valve is used as a first throttling device during heating, and the electronic expansion valve is used as a second throttling device during refrigerating; as shown in fig. 1, the two throttling devices are respectively an electronic expansion valve, a one-way valve and a capillary tube; the electronic expansion valve is arranged between the frequency conversion drive plate and the stop valve, and the one-way valve and the capillary tube are arranged between the frequency conversion drive plate and the outdoor heat exchanger.
The control scheme for such a system is: the method comprises the steps of determining the operation control mode of an electronic expansion valve according to the current operation mode of the air conditioning unit, taking the electronic expansion valve as a second throttling device if the current operation mode is a refrigeration mode, condensing and releasing heat of a refrigerant by a condenser to form liquid passing through a one-way valve, cooling and radiating the refrigerant by a variable-frequency drive plate during cooling of a refrigerant radiating pipe, wherein the temperature of the refrigerant radiating pipe is higher than the dew point temperature, so that the condensation problem cannot occur, opening degree control can be performed according to the refrigeration mode, and the temperature of a refrigerant radiating pipe is not influenced while the system capacity is.
If the current mode is the heating mode, the electronic expansion valve is used as a first throttling device, and whether the electronic expansion valve is controlled according to the condensation prevention of the variable-frequency drive plate or not needs to be judged according to the difference value between the temperature of the refrigerant heat release pipe and the internal temperature of the drive plate. If according to the condensation control is prevented to the frequency conversion drive plate, carry out aperture control to electronic expansion valve, promote refrigerant heat release pipe department temperature, avoid frequency conversion drive plate department condensation water to produce to improve automatically controlled reliability.
Specifically, in the heating mode, firstly, the temperature T1 of the refrigerant radiating pipe after the first throttling and the internal temperature T2 of the variable frequency drive board are obtained, and the difference T between T1 and T2 is calculated, if the difference T is smaller than a lower threshold F1, it is determined that the risk of generating condensation is small, and in order not to affect the performance of the air conditioner, the condensation prevention control is not performed at this time, and the control mode for the electronic expansion valve in the heating mode is still used for controlling, and the flow is as shown in fig. 3.
If the difference value is between a smaller threshold value and a larger threshold value, namely, t is more than F1 and less than or equal to F2, the risk of generating condensation is judged to be larger, condensation prevention control needs to be performed, and at the moment, the temperature at the refrigerant heat-releasing pipe is increased by adjusting the opening degree of the electronic expansion valve. If the difference t is detected to satisfy t not more than F1 in the anti-condensation control process, the anti-condensation control is exited, and the control is still performed according to the control mode of the electronic expansion valve in the heating mode, and the flow is shown in FIG. 4.
If the difference is larger than a larger threshold value, namely T is larger than F2, the condensation fault is judged to possibly occur, condensation fault prompt is carried out while anti-condensation control is carried out, in the anti-condensation control process, the temperature of the temperature T1 of the refrigerant radiating pipe is gradually increased, if the difference T meets F1 and T is smaller than or equal to F2, condensation prevention control under the condition that F1 and T are smaller than or equal to F2 is carried out, if the difference T meets T and is smaller than or equal to F1, condensation prevention control is withdrawn, and control on the electronic expansion valve under the heating mode is still carried out. And if the condensation fault occurs for three times within one hour, triggering the fault to stop the machine, and controlling the machine set to be closed for protection, wherein the flow is shown in fig. 5.
Example 2:
the cooling and condensation prevention control method for the refrigerant of the air conditioner variable frequency drive board in the embodiment is applied to a system in which throttling devices are arranged at the front and the rear of a refrigerant radiating pipe, wherein each throttling device comprises an electronic expansion valve, and the installation positions of the electronic expansion valves meet the following requirements: the electronic expansion valve is used as a first throttling device during refrigeration, and the electronic expansion valve is used as a second throttling device during heating; as shown in fig. 2, the two throttling devices are respectively an electronic expansion valve, a one-way valve and a capillary tube; the one-way valve and the capillary tube are arranged between the frequency conversion drive plate and the stop valve, and the electronic expansion valve is arranged between the frequency conversion drive plate and the outdoor heat exchanger.
The control scheme for such a system is: the method comprises the steps of determining an operation control mode of an electronic expansion valve according to a current operation mode of the air conditioning unit, taking the electronic expansion valve as a second throttling device if the current operation mode is a heating mode, condensing and releasing heat of a refrigerant by a condenser to form liquid passing through a one-way valve, cooling and radiating the refrigerant by a variable-frequency drive board during a refrigerant radiating pipe, wherein the temperature of the refrigerant radiating pipe is higher than the dew point temperature, so that the condensation problem cannot occur, opening degree control can be performed according to the heating mode, and the temperature of a refrigerant radiating pipe is not influenced while the system capacity is ensured.
If the current mode is the refrigeration mode, the electronic expansion valve is used as a first throttling device, and whether the electronic expansion valve is controlled according to the condensation prevention of the variable-frequency drive plate or not needs to be judged according to the difference value between the temperature of the refrigerant heat release pipe and the internal temperature of the drive plate. If according to the condensation control is prevented to the frequency conversion drive plate, carry out aperture control to electronic expansion valve, promote refrigerant heat release pipe department temperature, avoid frequency conversion drive plate department condensation water to produce to improve automatically controlled reliability.
Specifically, in the cooling mode, firstly, the temperature T1 of the refrigerant radiating pipe after the first throttling and the internal temperature T2 of the variable frequency drive board are obtained, and the difference T between T1 and T2 is calculated, if the difference T is smaller than a lower threshold value F1, it is determined that the risk of generating condensation is small, and in order not to affect the performance of the air conditioner, the control is performed according to the control mode of the electronic expansion valve in the cooling mode without entering the condensation prevention control, and the flow is as shown in fig. 6.
If the difference value is between a smaller threshold value and a larger threshold value, namely, t is more than F1 and less than or equal to F2, the risk of generating condensation is judged to be larger, condensation prevention control needs to be performed, and at the moment, the temperature at the refrigerant heat-releasing pipe is increased by adjusting the opening degree of the electronic expansion valve. If the difference t is detected to satisfy t not more than F1 in the anti-condensation control process, the anti-condensation control is exited, and the control is still performed according to the control mode of the electronic expansion valve in the refrigeration mode, and the flow is shown in FIG. 7.
If the difference is larger than a larger threshold value, namely T is larger than F2, the condensation fault is judged to possibly occur, condensation fault prompt is carried out while anti-condensation control is carried out, in the anti-condensation control process, the temperature of the temperature T1 of the refrigerant radiating pipe is gradually increased, if the difference T meets F1 and T is smaller than or equal to F2, anti-condensation control under the condition that F1 and T are smaller than or equal to F2 is carried out, if the difference T meets T and is smaller than or equal to F1, the anti-condensation control is quitted, and the control mode of the electronic expansion valve under the refrigeration mode is still adopted. And if the condensation fault occurs for three times within one hour, triggering the fault to stop the machine, and controlling the machine set to be closed for protection, wherein the flow is shown in fig. 8.
Claims (10)
1. A control method for cooling and condensation prevention of a refrigerant of an air conditioner variable frequency drive board is applied to a system in which throttling devices are arranged at the front and the back of a refrigerant radiating pipe, wherein each throttling device comprises an electronic expansion valve, and the installation positions of the electronic expansion valves meet the following requirements: the electronic expansion valve is used as a first throttling device during heating, and the electronic expansion valve is used as a second throttling device during refrigerating; it is characterized in that the preparation method is characterized in that,
the control method comprises the following steps:
A. determining a control mode of the electronic expansion valve according to the current operation mode of the air conditioning unit, if the current operation mode is a refrigeration mode, because the temperature of the cooling pipe of the refrigerant is higher than the dew point temperature, no condensed water is generated, and only the electronic expansion valve is required to be adjusted according to the refrigeration mode; if the current mode is the heating mode, entering the step B;
B. and acquiring the temperature T1 of the refrigerant radiating pipe after the first throttling and the internal temperature T2 of the variable frequency drive board, calculating a difference value T between T1 and T2, and judging whether the variable frequency drive board needs to enter anti-condensation control according to the difference value T.
2. The method for controlling cooling and condensation prevention of the refrigerant in the variable frequency driving board of the air conditioner as claimed in claim 1,
in the step B, comparing the difference value t with a preset temperature value, and judging whether to enter the variable frequency drive plate for condensation prevention control, wherein the method specifically comprises the following steps:
(1) judging the relation between the difference t and preset temperature thresholds F1 and F2, and entering the step (2) if the difference t is less than or equal to F1; if the difference t is more than F1 and less than or equal to F2, entering the step (3); if the difference t is larger than F2, entering the step (4); the temperature threshold F1 is less than F2;
(2) when the difference t is less than or equal to F1, the control mode of the electronic expansion valve according to the heating mode is still adopted without entering the condensation prevention control of the variable frequency drive plate;
(3) when the difference t is more than F1 and less than or equal to F2, controlling anti-condensation according to the variable frequency drive board, and if the difference t is less than or equal to F1 in the anti-condensation control process, quitting the anti-condensation control, and returning to the step (1);
(4) and when the difference value t is larger than F2, controlling condensation prevention according to the variable frequency drive plate, simultaneously displaying condensation faults of the variable frequency drive plate, and if the condensation fault stop condition is met, controlling the unit to stop and ending the process.
3. The method for controlling cooling and condensation prevention of the refrigerant in the variable frequency driving board of the air conditioner as claimed in claim 2,
the stop condition of the condensation fault is as follows: three gel failures occurred within one hour.
4. The method for controlling cooling and condensation prevention of the refrigerant in the variable frequency driving board of the air conditioner as claimed in claim 2,
according to frequency conversion drive plate condensation control include: the temperature of the refrigerant heat-radiating pipe is increased by adjusting the opening degree of the electronic expansion valve, and the opening degree of the electronic expansion valve is adjusted to different degrees when the current difference value t is in different temperature ranges.
5. The method for controlling cooling and condensation prevention of the refrigerant in the variable frequency driving board of the air conditioner as claimed in claim 4,
the step (4) further comprises the following steps: and (3) if the difference t satisfies F1 and is more than the difference t and less than or equal to F2 in the anti-condensation control, exiting the anti-condensation control and returning to the step (1) if the difference t satisfies t and is less than or equal to F1.
6. A control method for cooling and condensation prevention of a refrigerant of an air conditioner variable frequency drive board is applied to a system in which throttling devices are arranged at the front and the back of a refrigerant radiating pipe, wherein each throttling device comprises an electronic expansion valve, and the installation positions of the electronic expansion valves meet the following requirements: the electronic expansion valve is used as a first throttling device during refrigeration, and the electronic expansion valve is used as a second throttling device during heating; it is characterized in that the preparation method is characterized in that,
the control method comprises the following steps:
A. determining a control mode of the electronic expansion valve according to the current operation mode of the air conditioning unit, if the current operation mode is a heating mode, because the temperature of the refrigerant radiating pipe is higher than the dew point temperature, no condensed water is generated, and only the electronic expansion valve is required to be adjusted according to the heating mode; if the current mode is the refrigeration mode, entering the step B;
B. and acquiring the temperature T1 of the refrigerant radiating pipe after the first throttling and the internal temperature T2 of the variable frequency drive board, calculating a difference value T between T1 and T2, and judging whether the variable frequency drive board needs to enter anti-condensation control according to the difference value T.
7. The method for controlling cooling and condensation prevention of the refrigerant in the variable frequency driving board of the air conditioner as claimed in claim 6,
in the step B, comparing the difference value t with a preset temperature value, and judging whether to enter the variable frequency drive plate for condensation prevention control, wherein the method specifically comprises the following steps:
(1) judging the relation between the difference t and preset temperature thresholds F1 and F2, and entering the step (2) if the difference t is less than or equal to F1; if the difference t is more than F1 and less than or equal to F2, entering the step (3); if the difference t is larger than F2, entering the step (4); the temperature threshold F1 is less than F2;
(2) when the difference t is less than or equal to F1, the control mode of the electronic expansion valve according to the refrigeration mode is still adopted without entering the anti-condensation control of the variable frequency drive plate;
(3) when the difference t is more than F1 and less than or equal to F2, controlling anti-condensation according to the variable frequency drive board, and if the difference t is less than or equal to F1 in the anti-condensation control process, quitting the anti-condensation control, and returning to the step (1);
(4) and when the difference value t is larger than F2, controlling condensation prevention according to the variable frequency drive plate, simultaneously displaying condensation faults of the variable frequency drive plate, and if the condensation fault stop condition is met, controlling the unit to stop and ending the process.
8. The method for controlling cooling and condensation prevention of the refrigerant in the variable frequency driving board of the air conditioner as claimed in claim 7,
the stop condition of the condensation fault is as follows: three gel failures occurred within one hour.
9. The method for controlling cooling and condensation prevention of the refrigerant in the variable frequency driving board of the air conditioner as claimed in claim 7,
according to frequency conversion drive plate condensation control include: the temperature of the refrigerant heat-radiating pipe is increased by adjusting the opening degree of the electronic expansion valve, and the opening degree of the electronic expansion valve is adjusted to different degrees when the current difference value t is in different temperature ranges.
10. The method for controlling cooling and condensation prevention of the refrigerant in the variable frequency driving board of the air conditioner as claimed in claim 9,
the step (4) further comprises the following steps: and (3) if the difference t satisfies F1 and is more than the difference t and less than or equal to F2 in the anti-condensation control, exiting the anti-condensation control and returning to the step (1) if the difference t satisfies t and is less than or equal to F1.
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| CN202010947120.8A CN112032919A (en) | 2020-09-10 | 2020-09-10 | Refrigerant cooling and condensation preventing control method for air conditioner variable frequency drive board |
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| CN202010947120.8A CN112032919A (en) | 2020-09-10 | 2020-09-10 | Refrigerant cooling and condensation preventing control method for air conditioner variable frequency drive board |
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Cited By (6)
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| CN112566464A (en) * | 2020-12-10 | 2021-03-26 | 青岛海信日立空调系统有限公司 | Air conditioner |
| CN113108391A (en) * | 2021-05-20 | 2021-07-13 | 珠海格力电器股份有限公司 | Air conditioning system, heat dissipation device and heat dissipation control method thereof |
| CN113573558A (en) * | 2021-07-28 | 2021-10-29 | 珠海格力电器股份有限公司 | Heat dissipation system, air conditioning unit and air conditioning unit control method |
| CN114777352A (en) * | 2022-03-23 | 2022-07-22 | 浙江中广电器集团股份有限公司 | Fluorine cooling variable frequency drive control module unit and control method thereof |
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