CN110044032B - Control method of air conditioner - Google Patents
Control method of air conditioner Download PDFInfo
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- CN110044032B CN110044032B CN201910301434.8A CN201910301434A CN110044032B CN 110044032 B CN110044032 B CN 110044032B CN 201910301434 A CN201910301434 A CN 201910301434A CN 110044032 B CN110044032 B CN 110044032B
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- frequency
- control box
- box assembly
- temperature
- heat dissipation
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
Abstract
The invention discloses a control method of an air conditioning device, which comprises the following steps: a variable frequency compressor; an outdoor heat exchanger; a throttling element; the electric control box assembly is electrically connected with the variable-frequency compressor to control the working frequency of the variable-frequency compressor; the heat dissipation module is used for cooling the electric control box assembly; the temperature detection component is used for detecting the temperature of the electric control box component and is electrically connected with the electric control box component; when the current temperature of the electric control box assembly is detected to be greater than or equal to a first preset temperature T1, the electric control box assembly acquires the current frequency of the variable frequency compressor and controls the variable frequency compressor to enter a frequency limiting mode with the current frequency as an upper limit. According to the control method of the air conditioning device provided by the embodiment of the invention, the high-temperature working reliability of the electric control box assembly can be ensured, and the self-adaptability of high-temperature protection can be realized.
Description
Technical Field
The present invention relates to the field of air conditioning devices.
Background
With the development of air conditioning technology, air conditioning functions and control modes are gradually diversified, and the heat productivity of electric control components of the air conditioner is gradually increased. In the air conditioner disclosed in the related art, most of the electric control components are cooled by the cooling fins through air convection, and a technology of cooling the electric control by using a refrigerant at the outlet of the condenser is also provided. However, the existing refrigerant heat dissipation method does not have high-temperature protection for outdoor electronic control components, and the method cannot ensure the reliability of electronic control in extreme hot severe weather.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a control method of the air conditioning device, so that the air conditioning device is suitable for extremely hot weather and the reliability protection of electric control is improved.
According to the control method of the air conditioning device of the embodiment of the invention, the air conditioning device includes: a variable frequency compressor; an outdoor heat exchanger; a throttling element; the electric control box assembly is electrically connected with the variable-frequency compressor to control the working frequency of the variable-frequency compressor; the heat dissipation module is used for cooling the electronic control box assembly; the temperature detection component is used for detecting the temperature of the electric control box component and is electrically connected with the electric control box component; when the current temperature of the electric control box assembly is detected to be greater than or equal to a first preset temperature T1, the electric control box assembly acquires the current frequency of the variable frequency compressor and controls the variable frequency compressor to enter a frequency limiting mode, and the current frequency is the upper limit frequency of the working of the variable frequency compressor in the frequency limiting mode, namely:
when the preset frequency which is prepared by the electric control box component according to the operation condition of the air conditioning device is less than or equal to the upper limit frequency, the variable frequency compressor operates according to the preset frequency;
and when the preset frequency which is prepared by the electric control box component according to the operation condition of the air conditioning device is greater than the upper limit frequency, the variable frequency compressor operates according to the upper limit frequency.
According to the control method of the air conditioning device, the heat dissipation module is arranged to dissipate heat of the electronic control box assembly, so that the electronic control box assembly can dissipate heat quickly. Through setting up the temperature detection piece to automatically controlled box subassembly temperature measurement to find the best upper limit frequency for inverter compressor according to the detection temperature, make the setting of upper limit frequency adjust according to the change of actual operating condition, can not only ensure the high temperature operational reliability of automatically controlled box subassembly, can realize the self-adaptability of high temperature protection moreover.
In some embodiments, after entering the frequency limiting mode, when the current temperature of the electronic control box assembly is detected to be less than or equal to a second preset temperature T2, the inverter compressor exits the frequency limiting mode, and the inverter compressor enters the free inverter mode, wherein the second preset temperature T2< the first preset temperature T1.
In some embodiments, after entering the frequency limiting mode, when the current temperature of the electronic control box assembly is detected to be greater than or equal to a third preset temperature T3, the inverter compressor exits the frequency limiting mode, and the inverter compressor enters the frequency reduction mode, the electronic control box assembly controls the inverter compressor to reduce the working frequency, and the first preset temperature T1< the third preset temperature T3.
In some embodiments, after entering the down-conversion mode, when the current temperature of the electronic control box assembly is detected to be greater than or equal to a fourth preset temperature T4, the inverter compressor exits the down-conversion mode, the electronic control box assembly controls the inverter compressor to stop, and the third preset temperature T3< the fourth preset temperature T4.
In some embodiments, the heat dissipation module includes at least one of a heat dissipation plate, a heat dissipation fin, and a fan.
In some embodiments, the heat dissipation module includes a refrigerant heat dissipation tube, and the refrigerant heat dissipation tube is connected in series in a refrigerant circulation system including the inverter compressor, the outdoor heat exchanger, and the throttling element.
Optionally, the air conditioning device includes two throttling elements, and the refrigerant heat dissipation pipe is connected in series between the two throttling elements.
Optionally, the refrigerant heat dissipation pipe is connected in series or in parallel to the air return pipe of the inverter compressor.
Optionally, part of the pipe section of the refrigerant heat dissipation pipe is in contact with the box body of the electronic control box assembly, and part of the pipe section of the refrigerant heat dissipation pipe is in contact with components in the electronic control box assembly.
Optionally, the electric control box assembly is filled with the insulating heat-conducting member after being vacuumized.
Optionally, the heat dissipation module includes a semiconductor refrigeration sheet, and a cold end of the semiconductor refrigeration sheet is used for dissipating heat of the electronic control box assembly.
Specifically, the refrigerants used in the air-conditioning apparatus are R290, R407C, R410A, and R32.
Optionally, the box body of the electronic control box assembly is a closed box body.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow path diagram of a refrigerant cycle system in a case where an air-conditioning apparatus according to an embodiment is a chiller.
Fig. 2 is a schematic flow path diagram of a refrigerant cycle system in a case where the air-conditioning apparatus according to another embodiment is a chiller.
Fig. 3 is a schematic diagram of a flow path of a refrigerant cycle system in a case where the air-conditioning apparatus of the further embodiment is a chiller.
Fig. 4 is a schematic flow path diagram of a refrigerant cycle system in a case where the air-conditioning apparatus according to still another embodiment is a chiller.
Fig. 5 is a schematic flow path diagram of a refrigerant cycle system in a case where the air-conditioning apparatus of the embodiment is a cooling/warming apparatus.
Fig. 6 is a schematic flow path diagram of a refrigerant cycle system in a case where the air-conditioning apparatus of yet another embodiment is a cooling/warming apparatus.
Fig. 7 is a schematic flow path diagram of a refrigerant cycle system in a case where the air-conditioning apparatus according to still another embodiment is a cooling/warming apparatus.
Fig. 8 is a schematic flow path diagram of a refrigerant cycle system in a case where the air-conditioning apparatus of the embodiment is a cooling/warming apparatus.
Fig. 9 is a schematic diagram of a flow path of a refrigerant cycle system in a case where the air-conditioning apparatus of another embodiment is a cooling/warming apparatus.
Fig. 10 is a schematic diagram of a flow path of a refrigerant cycle system in a case where an air-conditioning apparatus according to still another embodiment is a cooling/warming apparatus.
Fig. 11 is a control flowchart of an air conditioning device of an embodiment.
Reference numerals:
an air conditioner 100,
A variable frequency compressor 1, an air return pipe 11, a liquid storage device 12,
An outdoor heat exchanger 2,
A throttling element 3,
An indoor heat exchanger 4,
An electric control box component 5,
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 accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A control method of an air conditioning device according to an embodiment of the present invention is described below with reference to the drawings.
An air conditioning device 100 according to an embodiment of the present invention, as shown in fig. 1, includes: the variable frequency compressor comprises a variable frequency compressor 1, an outdoor heat exchanger 2, a throttling element 3, an electronic control box assembly 5 and a heat dissipation module 6 for cooling the electronic control box assembly 5. The air conditioning device 100 further includes an indoor heat exchanger 4, the inverter compressor 1, the indoor heat exchanger 4, the outdoor heat exchanger 2, and the throttling element 3 constitute four basic components of a refrigerant circulation system of the air conditioning device 100, and certainly, in order to ensure the normal operation of the air conditioning device 100, other components are connected to the refrigerant circulation system, which are not listed here. The specific construction and operation of such components as compressors, heat exchangers, etc. are well known to those skilled in the art and will not be described in detail herein.
Wherein, automatically controlled box subassembly 5 is connected with inverter compressor 1 electricity, and automatically controlled box subassembly 5 is used for controlling inverter compressor 1's operating frequency, and heat radiation module 6 is used for cooling off automatically controlled box subassembly 5. It can be understood that the parts of the air conditioning device 100 where the inverter compressor 1 and the outdoor heat exchanger 2 are installed are usually located outdoors, while the air conditioning device 100 usually operates the cooling function in hot days, and the high-speed operation of the electronic control box assembly 5 in hot days generates a large amount of heat which is difficult to dissipate, so that the heat dissipation module 6 is arranged to cool the electronic control box assembly 5. However, the protection of the electronic control box assembly 5 by the heat dissipation module 6 is limited, for example, in extremely hot weather, severe weather in some high-temperature places and special working conditions, the temperature may even exceed 60 ℃ or higher. And under the condition that the outdoor environment is extremely hot, the heat dissipation environment of the components of the electric control box component 5 is severe, the heat dissipation effect is poor, and the reliability and the service life of the components can be influenced.
The improvement of the embodiment of the present invention is to further improve the structure and the control method of the air conditioning device 100 in response to the severe conditions.
Specifically, the air conditioning device 100 further includes a temperature detecting component (not shown) for detecting the temperature of the electronic control box component 5, and the temperature detecting component is electrically connected to the electronic control box component 5 to transmit the detected temperature information of the electronic control box component 5 to the electronic control box component 5. When the current temperature of the electric control box assembly 5 is detected to be greater than or equal to the first preset temperature T1, the electric control box assembly 5 obtains the current frequency of the variable frequency compressor 1 and controls the variable frequency compressor to enter a frequency limiting mode, wherein the current frequency is the upper limit frequency of the variable frequency compressor 1 in the frequency limiting mode. That is to say, after the inverter compressor 1 is started up, if it is detected that the temperature of the electronic control box assembly 5 reaches the first preset temperature T1 from a certain moment, the operating frequency of the inverter compressor 1 at the moment is recorded as the upper limit frequency, and then the inverter compressor 1 enters the frequency limiting mode, and the operating frequency of the down-conversion compressor 1 in the frequency limiting mode cannot exceed the upper limit frequency no matter how the operating frequency is adjusted until the down-conversion compressor exits the frequency limiting mode.
When the preset frequency which is prepared by the electric control box component 5 according to the operation condition of the air conditioning device 100 is less than or equal to the upper limit frequency, the variable frequency compressor 1 operates according to the preset frequency;
when the preset frequency, which is allocated by the electric control box assembly 5 according to the operation condition of the air conditioning device 100, is greater than the upper limit frequency, the variable frequency compressor 1 operates according to the upper limit frequency.
It should be noted that, in the control programs of the air conditioning devices 100 of different types, the methods used and the parameters used in the adjustment of the preset frequency according to the operating conditions are different. For ease of understanding, the selection method of the allocation manner of the preset frequency is briefly described below by using different examples.
Example one: the electric control box assembly 5 is pre-stored with a corresponding relation table of preset frequency-internal temperature difference during refrigeration, and the internal temperature difference is the difference value between the indoor actual temperature and the target temperature. When the internal temperature difference is 0-5 degrees, the preset frequency is a 1; when the internal temperature difference is 5-8 degrees, the preset frequency is a 2; when the internal temperature difference is 8-12 degrees, the preset frequency is a 3; when the internal temperature difference is 12-15 degrees, the preset frequency is a 4; when the internal temperature difference exceeds 15 °, the preset frequency is a 5. Therefore, the electric control box assembly 5 can obtain the preset frequency only by obtaining the indoor actual temperature and the target temperature.
Example two: the electric control box assembly 5 is pre-stored with a corresponding relation table of preset frequency-internal temperature difference and outdoor temperature during refrigeration. When the internal temperature difference is in a first interval and the outdoor temperature is 15-25 degrees, the preset frequency is b 1; when the internal temperature difference is in a first interval and the outdoor temperature is 25-30 degrees, the preset frequency is b 2; the internal temperature difference is in a first interval, and when the outdoor temperature is 30-40 degrees, the preset frequency is b 3; when the internal temperature difference is in a first interval and the outdoor temperature is 40-50 degrees, the preset frequency is b 4; when the internal temperature difference is in a first interval and the outdoor temperature exceeds 50 degrees, the preset frequency is b 5; when the internal temperature difference is in a second interval and the outdoor temperature is 15-25 degrees, the preset frequency is c 1; when the internal temperature difference is in a second interval and the outdoor temperature is 25-30 degrees, the preset frequency is c 2; when the internal temperature difference is in a second interval and the outdoor temperature is 30-40 degrees, the preset frequency is c 3; when the internal temperature difference is in a second interval and the outdoor temperature is 40-50 degrees, the preset frequency is c 4; when the internal temperature difference is in a second interval and the outdoor temperature exceeds 50 degrees, the preset frequency is c 5; and so on. Therefore, the electric control box assembly 5 can obtain the preset frequency only by obtaining the indoor actual temperature, the target temperature and the outdoor temperature.
Of course, other factors, such as the adjusting capability of the throttling element, the failure rate of the device, etc., may also be considered when setting the allocation method of the preset frequency according to the operation condition of the air conditioning device 100, which is not listed here.
In the embodiment of the invention, the higher the frequency of the inverter compressor 1 is, the larger the heat productivity of the electronic control box assembly 5 for controlling the inverter compressor 1 is. By measuring the temperature of the electric control box assembly 5, when the temperature of the electric control box assembly 5 is lower than the first preset temperature T1, the air conditioning device 100 can freely adjust the working frequency of the inverter compressor 1 according to the self-running working condition. However, when the temperature of the electronic control box assembly 5 reaches T1 at a certain time, the operating frequency of the inverter compressor 1 becomes the upper limit frequency at that time. This limitation means that after this time, if the air conditioning device 100 needs to adjust the operating frequency up according to its own operating conditions, the inverter compressor 1 can only be kept operating at the upper limit frequency. After this time, if the air conditioning device 100 needs to lower the operating frequency according to its own operating condition, the frequency of the inverter compressor 1 is not limited to be lowered. After this time, if the air conditioning apparatus 100 adjusts the operating frequency again after adjusting the operating frequency down according to its own operating condition, the inverter compressor 1 will experience a process of increasing after decreasing the frequency, but will not exceed the upper limit frequency after increasing.
By the method, different air conditioning devices 100 can find the optimal upper limit frequency of the variable frequency compressor 1 in order to avoid overheating of the electric control box assembly 5. And aiming at the same air conditioning device 100, under different operating conditions, because the heating conditions of the electronic control box assembly 5 are different, the method can enable the air conditioning device 100 to find the optimal upper limit frequency for the variable frequency compressor 1 according to the different operating conditions, thereby realizing the self-adaptability of the high-temperature protection of the air conditioning device 100.
According to the air conditioning device 100 of the embodiment of the invention, the heat dissipation module 6 is arranged to dissipate heat of the electronic control box assembly 5, so that the electronic control box assembly 5 can dissipate heat quickly. Through setting up the temperature detection subassembly to the temperature measurement of automatically controlled box subassembly 5 to find the best upper limit frequency for inverter compressor 1 according to the detected temperature, make the setting of upper limit frequency adjust according to the operating condition change, can not only ensure the high temperature operational reliability of automatically controlled box subassembly 5, can realize the self-adaptability of high temperature protection moreover.
It was mentioned above that after the inverter compressor 1 enters the frequency limited mode, the inverter compressor 1 exits the frequency limited mode when the exit condition is met. The exiting condition can be set in various ways, for example, the exiting condition is formed by the duration of the frequency limiting mode reaching a preset time, and for example, the exiting condition can also be formed by the operation stop of the inverter compressor 1.
In a specific example, when the air conditioning device 100 is stopped, the inverter compressor 1 is also stopped, and after the air conditioning device 100 is restarted, the inverter compressor 1 can freely adjust the working frequency again according to the requirement of the operating condition of the air conditioning device 100 until entering the frequency limiting mode.
In some embodiments, after entering the frequency limiting mode, when it is detected that the current temperature of the electronic control box assembly 5 is less than or equal to the second preset temperature T2, the inverter compressor 1 exits the frequency limiting mode, and the inverter compressor 1 enters the free inverter mode, wherein the second preset temperature T2< the first preset temperature T1. The free frequency conversion mode here means that the variable frequency compressor 1 can freely adjust the working frequency according to the requirement of the operation condition of the air conditioning device 100, that is, when the electronic control box assembly 5 allocates the preset frequency according to the operation condition of the air conditioning device 100, the variable frequency compressor 1 can operate according to the preset frequency no matter whether the preset frequency is larger than the upper limit frequency or smaller than the upper limit frequency. Therefore, when the temperature of the electric control box assembly 5 is not too hot, the air conditioning device 100 can be adjusted to a parameter state suitable for the operation condition as soon as possible, the limitation of the upper limit frequency is avoided from being too large, and the adjustment flexibility is further improved.
In a specific example, the temperature detection component tracks the temperature change of the electronic control box component 5 at any time in one operation period of the inverter compressor 1. If in this operation cycle, the temperature of the electronic control box assembly 5 is lower than the first preset temperature T1 before the first moment, the temperature of the electronic control box assembly 5 is greater than or equal to the first preset temperature T1 at the first moment, the temperature is greater than the second preset temperature T2 from the first moment to the second moment, the temperature of the electronic control box assembly 5 is less than or equal to the second preset temperature T2 at the second moment, the operating frequency of the inverter compressor 1 at the first moment is recorded as P1 at this moment, and the operating frequency of the inverter compressor 1 is limited within P1 from the first moment to the second moment. Wherein, when the inverter compressor 1 is started to the first moment, the working frequency of the inverter compressor 1 is not limited by P1.
In the same operation cycle, if the temperature of the electronic control box assembly 5 is lower than the first preset temperature T1 from the second time to the third time, the temperature of the electronic control box assembly 5 is greater than or equal to the first preset temperature T1 at the third time, and the temperature is greater than the second preset temperature T2 from the third time to the fourth time, and the temperature of the electronic control box assembly 5 is less than or equal to the second preset temperature T2 at the fourth time, at this time, the operating frequency of the inverter compressor 1 at the third time is recorded as P2, and the operating frequency of the inverter compressor 1 is limited within P2 from the third time to the fourth time. Wherein, the working frequency of the inverter compressor 1 is not limited by P1 and P2 from the second moment to the third moment of the inverter compressor 1. And so on until other conditions break the above limits.
In some embodiments, after entering the frequency limiting mode, when detecting that the current temperature of the electronic control box assembly 5 is greater than or equal to the third preset temperature T3, the inverter compressor 1 exits the frequency limiting mode, and the inverter compressor 1 enters the frequency reduction mode, and the electronic control box assembly 5 controls the inverter compressor 1 to reduce the operating frequency, wherein the first preset temperature T1< the third preset temperature T3. That is to say, when the temperature of the electronic control box assembly 5 is too high, the working frequency of the inverter compressor 1 needs to be forcibly reduced, so as to reduce the heat productivity of the electronic control box assembly 5, so that the electronic control box assembly can be rapidly cooled, and the electronic control box assembly 5 is forcibly protected.
In some embodiments, after entering the frequency-down mode, when the current temperature of the electronic control box assembly 5 is detected to be greater than or equal to a fourth preset temperature T4, the inverter compressor 1 exits the frequency-down mode, and the electronic control box assembly 5 controls the inverter compressor 1 to stop, wherein the third preset temperature T3< the fourth preset temperature T4. The fourth preset temperature T4 is a warning temperature, and in the case that the frequency of the inverter compressor 5 is limited, even in the case that the inverter compressor 5 is down-converted, if the electronic control box assembly 5 reaches the warning temperature, it indicates that the heat generation amount of the electronic control box assembly 5 cannot be controlled by controlling the frequency. At this time, the inverter compressor 5 is turned off, so that the heat productivity of the electronic control box assembly 5 can be rapidly reduced, and the effect of forcibly protecting the electronic control box assembly 5 is further achieved.
In an embodiment, the first preset temperature T1, the second preset temperature T2, the third preset temperature T3 and the fourth preset temperature T4 are all limited. Specifically, as shown in fig. 11, when the frequency of the inverter compressor 5 is not limited, the operating frequency of the inverter compressor 5 is not limited when the temperature of the electronic control box assembly 5 is lower than the first preset temperature T1. When the temperature exceeds the first preset temperature T1, the frequency of the variable frequency compressor 5 is limited, the frequency limitation of the variable frequency compressor 5 is removed when the temperature of the electric control box assembly 5 is lower than the second preset temperature T2, the frequency of the variable frequency compressor 5 is reduced when the temperature of the electric control box assembly 5 is higher than the third preset temperature T3, and the shutdown protection of the variable frequency compressor 5 is performed when the temperature of the electric control box assembly 5 is higher than the fourth preset temperature T4. Wherein the second preset temperature T2< the first preset temperature T1< the third preset temperature T3< the fourth preset temperature T4.
Further, after the inverter compressor 5 is stopped because the temperature of the electronic control box assembly 5 is higher than the fourth preset temperature T4, the inverter compressor 5 is started again when the temperature of the electronic control box assembly 5 is lower than the fifth preset temperature T5, where the fifth preset temperature T5 is lower than the fourth preset temperature T4. Alternatively, the second preset temperature T2< the fifth preset temperature T5< the first preset temperature T1.
Optionally, the first preset temperature T1 is 70-85 °. Optionally, the third preset temperature T3 is 75-90 °. Optionally, the fourth preset temperature T4 is 80-100 °.
In some embodiments, the electronic control box assembly 5 includes a box body and components arranged in the box body, and the components include a frequency conversion module for controlling the frequency conversion compressor 1.
Specifically, the box body is a closed box body, so that external air can be prevented from entering the box body. It can be understood that, in summer, the air humidity is high in a high-temperature environment, and when some heat dissipation modules 5 are cooled, water vapor in the air can be condensed. Therefore, the sealed box can prevent external high-humidity air from entering the box body, thereby preventing excessive condensed water from being generated in the box and further preventing components from being damaged by water.
Specifically, the box body is heat-conducting, and box body itself can derive inside heat promptly to improve heat-sinking capability.
Specifically, the box body of the electric control box component 5 is a vacuum box, so that air contained in the box body can be greatly reduced, and condensed water is difficult to generate in the box.
Optionally, the electric control box assembly 5 is filled with the insulating heat-conducting member after being vacuumized, that is, air in a sealed box body of the electric control box assembly 5 can be pumped out, and a material with good insulating and heat-conducting properties is filled in the box body. Therefore, when the insulating heat-conducting piece is utilized, the heat of the component can be guided to the box body and then dissipated to the outside air from the box body.
In the embodiment of the present invention, the heat dissipation module 6 has various structural forms.
In some embodiments, the heat dissipation module 6 includes at least one of a heat dissipation plate, a heat dissipation fin, and a fan. That is, the heat dissipation module 6 may include a heat dissipation plate, the heat dissipation module 6 may include heat dissipation fins, the heat dissipation module 6 may include a fan, the heat dissipation module 6 may include a heat dissipation plate, heat dissipation fins, and a fan, or the heat dissipation module 6 may include both of the above components.
In some embodiments, the heat dissipation module 6 includes a semiconductor cooling plate, the cold end of the semiconductor cooling plate is used for dissipating heat to the electronic control box assembly 5, and the hot end of the semiconductor cooling plate dissipates heat to the outside, so as to improve heat transfer efficiency.
In some embodiments, the heat dissipation module 6 includes a cooling medium heat dissipation tube 61, and the cooling medium heat dissipation tube 61 is connected in series in the cooling medium circulation system. Even more, the coolant heat dissipation pipe 61 may be combined with one or more of the heat dissipation plate, the heat dissipation fins, the fan, and the semiconductor cooling fins to form the heat dissipation module 6.
Alternatively, a part of the pipe section of the cooling medium heat pipe 61 contacts with the box body of the electronic control box assembly 5, and a part of the pipe section of the cooling medium heat pipe 61 contacts with components in the electronic control box assembly 5.
Specifically, the refrigerant used in the air-conditioning apparatus 100 is R290. In the refrigerant circulation system of this type, it is very suitable to use the refrigerant heat dissipation pipe 61 to dissipate heat from the electronic control box assembly 5. Of course, the air-conditioning apparatus 100 may use other types of refrigerants, such as R407C, R410A, and R32.
When adopting refrigerant cooling tube 61, can be connected through heating panel structure such as aluminum plate, copper between refrigerant cooling tube 61 and the automatically controlled box subassembly 5, refrigerant cooling tube 61 also can with automatically controlled box subassembly 5 direct contact, can also link to each other like the semiconductor refrigeration piece through other parts etc. all are unrestricted here.
In addition, in the refrigeration cycle path of the refrigerant cycle system, the position of the refrigerant heat dissipation pipe 61 is very flexible, for example, the refrigerant heat dissipation pipe 61 may be installed upstream of the throttling element 3 (i.e., connected between the outdoor heat exchanger 2 and the throttling element 3), may be installed downstream of the throttling element 3 (i.e., connected between the indoor heat exchanger 4 and the throttling element 3), and may further set a plurality of throttling elements 3, so that the refrigerant heat dissipation pipe 61 is connected in series between two throttling elements 3, thereby flexibly adjusting the temperature of the refrigerant heat dissipation pipe 61.
In some embodiments, the refrigerant heat dissipation pipe 61 is connected in series or in parallel to the air return pipe 11 of the inverter compressor 1, so as to increase the air return temperature of the inverter compressor 1.
In the embodiment of the invention, the improvement and control mode aiming at the severe condition is suitable for a single-cold machine, a single-heat machine and a cold-warm machine. In the following, many possible connection situations of the refrigerant heat dissipation module 6 are described with reference to different embodiments.
In the example shown in fig. 1, the air conditioning apparatus 100 is a single-cold machine, and the refrigerant heat dissipation module 6 is connected in series between the indoor heat exchanger 4 and the throttling element 3.
In the example shown in fig. 2, the air conditioning apparatus 100 is a single-cold machine, and the refrigerant heat dissipation module 6 is connected in series between the outdoor heat exchanger 2 and the throttling element 3.
In the example shown in fig. 3, the air conditioning device 100 is a single cooling unit, two throttling elements 3 are provided, and the refrigerant heat dissipation pipe 61 is connected in series between the two throttling elements 3.
In the example shown in fig. 4, the air conditioning apparatus 100 is a single-cold machine, and the refrigerant heat dissipation module 6 is connected in series to the air return pipe 11 of the inverter compressor 1, that is, the refrigerant flowing out of the indoor heat exchanger 4 flows back to the inverter compressor 1 from the liquid reservoir 12 after passing through the refrigerant heat dissipation pipe 61.
When the air conditioning apparatus 100 is a single heat engine, the refrigerant flows to the indoor heat exchanger 4 first, and then the refrigerant heat dissipation module 6 may be disposed at any position downstream of the indoor heat exchanger 4, with the exhaust port of the compressor as a starting point and the return port as an ending point.
In the example shown in fig. 5, the air-conditioning apparatus 100 is a cooling/heating apparatus, and the refrigerant heat dissipation module 6 is connected in series between the indoor heat exchanger 4 and the throttle element 3.
In the example shown in fig. 6, the air-conditioning apparatus 100 is a cooling/heating apparatus, and the refrigerant heat dissipation module 6 is connected in series between the outdoor heat exchanger 2 and the throttle member 3.
In the example shown in fig. 7, the air conditioner 100 is a cooling/heating device, two throttling elements 3 are provided, and the refrigerant heat radiation pipe 61 is connected in series between the two throttling elements 3.
In the example shown in fig. 8, the air conditioning apparatus 100 is a cooling/heating apparatus, the refrigerant heat dissipation module 6 is connected in series to the return pipe 11 of the inverter compressor 1, and the refrigerant heat dissipation module 6 is located between the four-way valve and the reservoir 12.
In the example shown in fig. 9, the air conditioning apparatus 100 is a cooling/heating apparatus, the refrigerant heat dissipation module 6 is connected in parallel to the return pipe 11 of the inverter compressor 1, and the refrigerant heat dissipation module 6 is located between the four-way valve and the indoor heat exchanger 4.
In the example shown in fig. 10, the air conditioner 100 is a cooling and heating device, and the refrigerant heat dissipation pipe 61 includes a plurality of pipe sections, some of which are located upstream of the throttling element 3, and some of which are located downstream of the throttling element 3. Of course, the structure of the refrigerant heat dissipation pipe 61 shown in fig. 10 can also be applied to a single cooler. Wherein, the temperature of the upstream pipe section is slightly higher than that of the downstream pipe section, and the pipe sections with different temperatures can be arranged at proper positions. For example, the low-temperature pipe section is contacted with the box body of the electric control box assembly 5, and the high-temperature pipe section is contacted with the components of the electric control box assembly 5, so that the condensate water is not afraid of being generated.
In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (13)
1. A control method of an air conditioning apparatus, characterized by comprising:
a variable frequency compressor;
an outdoor heat exchanger;
a throttling element;
the electric control box assembly is electrically connected with the variable-frequency compressor to control the working frequency of the variable-frequency compressor;
the heat dissipation module is used for cooling the electronic control box assembly;
the temperature detection component is used for detecting the temperature of the electric control box component and is electrically connected with the electric control box component; wherein the content of the first and second substances,
when detecting that the current temperature of the electronic control box assembly is greater than or equal to a first preset temperature T1, the electronic control box assembly acquires the current frequency of the variable frequency compressor and controls the variable frequency compressor to enter a frequency limiting mode, wherein the current frequency is the upper limit frequency of the working of the variable frequency compressor in the frequency limiting mode, namely:
when the preset frequency which is prepared by the electric control box component according to the operation condition of the air conditioning device is less than or equal to the upper limit frequency, the variable frequency compressor operates according to the preset frequency;
and when the preset frequency which is prepared by the electric control box component according to the operation condition of the air conditioning device is greater than the upper limit frequency, the variable frequency compressor operates according to the upper limit frequency.
2. The control method of the air conditioning device according to claim 1, wherein after entering the frequency limiting mode, when the current temperature of the electronic control box assembly is detected to be less than or equal to a second preset temperature T2, the inverter compressor exits the frequency limiting mode, and the inverter compressor enters the free inverter mode, wherein the second preset temperature T2< the first preset temperature T1.
3. The method as claimed in claim 1, wherein after entering the frequency limiting mode, when the current temperature of the electronic control box assembly is detected to be greater than or equal to a third preset temperature T3, the inverter compressor exits the frequency limiting mode, and enters the frequency reduction mode, the electronic control box assembly controls the inverter compressor to reduce the operating frequency, and the first preset temperature T1< the third preset temperature T3.
4. The method as claimed in claim 3, wherein after entering the down-conversion mode, when the current temperature of the electronic control box assembly is detected to be greater than or equal to a fourth preset temperature T4, the inverter compressor exits the down-conversion mode, the electronic control box assembly controls the inverter compressor to stop, and the third preset temperature T3< the fourth preset temperature T4.
5. The control method of an air conditioning device according to claim 1, wherein the heat dissipation module includes at least one of a heat dissipation plate, a heat dissipation fin, and a fan.
6. The method as claimed in any one of claims 1 to 5, wherein the heat dissipation module comprises a refrigerant heat dissipation pipe, and the refrigerant heat dissipation pipe is connected in series in a refrigerant circulation system including the inverter compressor, the outdoor heat exchanger, and the throttling element.
7. The method as claimed in claim 6, wherein the air conditioner includes two throttling elements, and the refrigerant heat dissipation pipe is connected in series between the two throttling elements.
8. The method as claimed in claim 6, wherein the refrigerant heat pipe is connected in series or in parallel to the return air pipe of the inverter compressor.
9. The control method of the air conditioning device according to claim 6, wherein a part of the pipe sections of the refrigerant heat dissipation pipe are in contact with the box body of the electronic control box assembly, and a part of the pipe sections of the refrigerant heat dissipation pipe are in contact with components in the electronic control box assembly.
10. The control method of an air conditioning apparatus according to any one of claims 1 to 5, wherein the inside of the electric control box assembly is filled with an insulating heat-conducting member by evacuation.
11. The control method of an air conditioning device according to any one of claims 1 to 5, wherein the heat dissipation module includes a semiconductor refrigeration sheet, and a cold end of the semiconductor refrigeration sheet is used for dissipating heat from the electronic control box assembly.
12. The method of controlling an air conditioning apparatus according to any one of claims 1 to 5, wherein the refrigerants used in the air conditioning apparatus are R290, R407C, R410A, and R32.
13. The control method of an air conditioning apparatus according to any one of claims 1 to 5, wherein the case of the electronic control box assembly is a closed case.
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| US11728757B2 (en) | 2019-11-07 | 2023-08-15 | Carrier Corporation | System and method for controlling temperature inside electrical and electronics system |
| CN111397140A (en) * | 2020-04-14 | 2020-07-10 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device and air conditioner |
| CN112303854B (en) * | 2020-10-30 | 2023-02-03 | 青岛海尔空调电子有限公司 | Control method of air suction type air conditioner |
| CN112303853B (en) * | 2020-10-30 | 2023-02-03 | 青岛海尔空调电子有限公司 | Control method of air suction type air conditioner |
| CN114110976A (en) * | 2021-11-12 | 2022-03-01 | 广东美的制冷设备有限公司 | Control method of air conditioner, controller, air conditioner and storage medium |
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| KR101395890B1 (en) * | 2007-10-18 | 2014-05-15 | 엘지전자 주식회사 | Motor controller of air conditioner and method of the motor controller |
| CN203907884U (en) * | 2014-01-13 | 2014-10-29 | 广东美的制冷设备有限公司 | Temperature sampling device of electric control modules of air conditioner, electric control box and air conditioner |
| CN103954022A (en) * | 2014-04-09 | 2014-07-30 | 美的集团股份有限公司 | Temperature-detection protective device and air conditioner |
| CN105674433A (en) * | 2016-03-04 | 2016-06-15 | 青岛海尔空调器有限总公司 | Frequency converter air-conditioning system for high-temperature environment |
| CN106839163A (en) * | 2017-03-14 | 2017-06-13 | 芜湖美智空调设备有限公司 | Heat radiation protection device, method and air-conditioner for the outdoor Electrical Control of air-conditioner |
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