CN110044031B - Control method of air conditioning device, electric control box assembly and air conditioning device - Google Patents
Control method of air conditioning device, electric control box assembly and air conditioning device Download PDFInfo
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- CN110044031B CN110044031B CN201910300951.3A CN201910300951A CN110044031B CN 110044031 B CN110044031 B CN 110044031B CN 201910300951 A CN201910300951 A CN 201910300951A CN 110044031 B CN110044031 B CN 110044031B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000003507 refrigerant Substances 0.000 claims abstract description 92
- 230000017525 heat dissipation Effects 0.000 claims abstract description 79
- 238000001816 cooling Methods 0.000 claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 239000002826 coolant Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000004065 semiconductor Substances 0.000 claims description 7
- 230000009467 reduction Effects 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 7
- 238000010792 warming Methods 0.000 description 6
- 238000005057 refrigeration Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
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- 229910052802 copper Inorganic materials 0.000 description 1
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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
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Abstract
The invention discloses a control method of an air conditioning device, an electric control box assembly and the air conditioning device. The air conditioning device includes: a variable frequency compressor; an outdoor heat exchanger; a throttling element; an electronic control box assembly; the refrigerant heat dissipation module is used for cooling the electric control box assembly; and the humidity detection component is used for detecting the humidity in the electric control box component. When the current humidity in the electric control box assembly is detected to be larger than or equal to the first preset humidity W1, 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, the humidity detection component for detecting the humidity of the electric control box component is arranged, the optimal upper limit frequency is found for the variable frequency compressor according to the detected humidity, the upper limit frequency can be adjusted according to the change of the operation working condition, the high-temperature working reliability of the electric control box component can be ensured, and the adaptability of high-humidity 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 mode does not have high humidity protection for outdoor electronic control components, and the mode 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.
The invention also aims to provide an electric control box assembly of the air conditioning device, which can improve the reliability of the whole machine when a refrigerant radiating pipe is adopted for cooling.
The invention also aims to provide an air conditioning device capable of realizing the method.
The control method of the air conditioning device according to the embodiment of the invention 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 refrigerant heat dissipation module is used for cooling the electronic control box assembly and comprises refrigerant heat dissipation pipes which are connected in series in a refrigerant circulating system comprising the variable frequency compressor, the outdoor heat exchanger and the throttling element; the humidity detection component is used for detecting the humidity in the electronic control box component and is electrically connected with the electronic control box component; when the current humidity in the electric control box assembly is detected to be greater than or equal to a first preset humidity W1, 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 refrigerant heat dissipation module is arranged to dissipate heat of the electric control box assembly, so that the electric control box assembly can dissipate heat quickly. The humidity detection component for detecting the humidity of the electric control box component is arranged, the optimal upper limit frequency is found for the variable frequency compressor according to the detected humidity, the upper limit frequency can be adjusted according to the change of the operation condition, the high-temperature working reliability of the electric control box component can be ensured, and the adaptability of high-humidity protection can be realized.
In some embodiments, after entering the frequency limiting mode, when it is detected that the current humidity in the electronic control box assembly is less than or equal to a second preset humidity W2, the inverter compressor exits the frequency limiting mode, and the inverter compressor enters the free inverter mode, where the second preset humidity W2< the first preset humidity W1.
In some embodiments, after entering the frequency limiting mode, when the humidity detecting component detects that the current humidity in the electronic control box component is greater than or equal to a third preset humidity W3, the inverter compressor exits the frequency limiting mode and enters the frequency reduction mode, and the electronic control box component controls the inverter compressor to reduce the operating frequency, wherein the first preset humidity W1< the third preset humidity W3.
In some embodiments, after entering the frequency-reduction mode, when detecting that the current humidity in the electronic control box assembly is greater than or equal to a fourth preset humidity W4, the inverter compressor exits the frequency-reduction mode, and the electronic control box assembly controls the inverter compressor to stop, wherein the first preset humidity W1< the fourth preset humidity W4.
Specifically, after the inverter compressor is shut down, when the humidity detection component detects that the humidity in the electronic control box component drops to a fifth preset humidity W5, the inverter compressor is restarted.
In some embodiments, the coolant heat dissipation module includes a water absorbing layer.
In some embodiments, the coolant heat dissipation module includes at least one of a heat dissipation plate, a heat dissipation fin, and a heat dissipation fan.
In some embodiments, the electrical control box assembly is filled with a thermally conductive layer.
In some embodiments, the coolant heat dissipation module includes a semiconductor cooling fin having a cold end for dissipating heat from the electronic control box assembly.
In some embodiments, the refrigerant circulating system employs R290, R407C, R410A, and R32 as refrigerants.
In some embodiments, the box body of the electronic control box assembly is a closed box body.
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.
According to the electric control box assembly of the air conditioning device provided by the embodiment of the invention, the electric control box assembly is cooled through the refrigerant radiating pipe, and comprises: a closed box body; the component is arranged in the box body; humidity detects the piece, humidity detects the piece and is used for detecting humidity in the box body.
According to the electric control box assembly of the air conditioning device, disclosed by the embodiment of the invention, the heat dissipation problem in a high-temperature environment can be solved, and the electric leakage problem caused by condensed water generated by condensation on the cooling pipe of the refrigerant under high humidity can be prevented by monitoring the change of the internal humidity.
According to the air conditioning device of the embodiment of the invention, the structure capable of realizing the method is adopted. Therefore, the electronic control box assembly in the air conditioning device can quickly dissipate heat. The humidity detection component for detecting the humidity of the electric control box component is arranged, the optimal upper limit frequency is found for the variable frequency compressor according to the detected humidity, the upper limit frequency can be adjusted according to the change of the operation condition, the high-temperature working reliability of the electric control box component can be ensured, and the adaptability of high-humidity protection can be realized.
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,
Refrigerant heat dissipation module 6, refrigerant heat dissipation pipe 61.
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 and the air conditioning device 100 according to an embodiment of the present invention are 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 refrigerant 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 these components, such as compressors, heat exchangers, etc., are well known to those skilled in the art and will not be described in detail herein. The cooling medium 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.
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 refrigerant heat dissipation module 6 is used for cooling automatically controlled box subassembly 5. It can be understood that the portions 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 refrigeration 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 refrigerant heat dissipation module 6 is arranged to cool the electronic control box assembly 5. However, the refrigerant heat dissipation module 6 also has a limitation on protecting the electronic control box assembly 5, for example, in extremely hot high-temperature and high-humidity weather, in some high-temperature places and severe weather under T3, the temperature may even exceed 60 ℃ or higher, and the humidity is also very high. 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, condensate water is easy to be attached, and the reliability and the service life of the components are affected.
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 humidity detection component (not shown) for detecting humidity in the electronic control box assembly 5, and the humidity detection component is electrically connected to the electronic control box assembly 5 to transmit detected humidity information in the electronic control box assembly 5 to the electronic control box assembly 5. When the current humidity in the electric control box assembly 5 is detected to be greater than or equal to the first preset humidity W1, the electric control box assembly 5 obtains the current frequency of the variable frequency compressor 1 and controls the variable frequency compressor 1 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 from a certain moment that the humidity in the electronic control box assembly 5 reaches the first preset humidity W1, 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 it 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 stronger the refrigerating capacity of the refrigerant circulating system is, so that the higher the capacity of the refrigerant radiating pipe 61 is, the more the condensed water is generated in the area cooled by the refrigerant radiating pipe 61, and if the condensed water is generated in the electric control box assembly 5, the service life and the working stability of components are affected, so that the internal humidity needs to be monitored constantly, and the components are prevented from being corroded by overlarge moisture.
By measuring the humidity in the electronic control box assembly 5, when the humidity in the electronic control box assembly 5 is lower than the first preset humidity W1, 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 humidity in the electronic control box assembly 5 reaches the first preset humidity W1 at a certain time, the operating frequency of the inverter compressor 1 becomes the upper limit frequency at that time. This limitation means that, in the frequency limit mode after this time, if the air conditioning device 100 needs to adjust the operating frequency up according to its own operating condition, 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. In the mode limiting mode after this time, if the air conditioning device 100 adjusts the operating frequency again after adjusting the operating frequency down according to its 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.
It can be understood that after the operating frequency of the inverter compressor 1 is limited, although the heat productivity of the electronic control box assembly 5 may decrease temporarily, the whole outdoor part is still in a high-temperature environment (for example, the outdoor heat exchanger 2 still radiates heat), so that the liquid in the electronic control box assembly 5 is heated and evaporated, and the condensate water is prevented from being formed to corrode components.
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 over-humidity in the electric control box assembly 5. Even if the same air conditioning device 100 is used, under different operating conditions, the humidity condition in the electronic control box assembly 5 is different, and the method can enable the air conditioning device 100 to find the optimal upper limit frequency for the variable frequency compressor 1 according to different operating conditions, so that the high-humidity protection adaptability of the air conditioning device 100 is realized.
According to the air conditioning device 100 of the embodiment of the invention, the refrigerant 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 humidity detection piece to automatically controlled box subassembly 5 wet survey to find the best upper limit frequency for inverter compressor 1 according to detecting humidity, make the setting of upper limit frequency can change and adjust according to the operating condition, can not only ensure the high temperature operational reliability of automatically controlled box subassembly 5, can realize the adaptability of high wet 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 humidity inside the electronic control box assembly 5 is less than or equal to the second preset humidity W2, the inverter compressor 1 exits the frequency limiting mode and enters the free inverter mode, wherein the second preset humidity W2< the first preset humidity W1. 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 humidity of the electronic control box assembly 5 is low, 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 humidity detection component tracks the humidity change in the electronic control box component 5 at any time during one operation period of the inverter compressor 1. If in this operation cycle, the humidity in the electronic control box assembly 5 is lower than the first preset humidity W1 before the first moment, the humidity in the electronic control box assembly 5 is greater than or equal to the first preset humidity W1 at the first moment, the humidity is greater than the second preset humidity W2 from the first moment to the second moment, the humidity in the electronic control box assembly 5 is less than or equal to the second preset humidity W2 at the second moment, at this time, the operating frequency of the variable frequency compressor 1 at the first moment is recorded as P1, and the operating frequency of the variable frequency 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.
Similarly, in the operation cycle, if the humidity in the electronic control box assembly 5 is lower than the first preset humidity W1 from the second time to the third time, the humidity in the electronic control box assembly 5 is greater than or equal to the first preset humidity W1 at the third time, the humidity is greater than the second preset humidity W2 from the third time to the fourth time, and the humidity in the electronic control box assembly 5 is less than or equal to the second preset humidity W2 at the fourth 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 it is detected that the current humidity in the electronic control box assembly 5 is greater than or equal to the third preset humidity W3, the inverter compressor 1 exits the frequency limiting mode and 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 humidity W1< the third preset humidity W3. That is to say, when the humidity in 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 condensed water and the humidity in the electronic control box assembly 5, and achieve the effect of forcibly protecting the electronic control box assembly 5.
In some embodiments, after entering the frequency-reduction mode, when it is detected that the current humidity in the electronic control box assembly 5 is greater than or equal to a fourth preset humidity W4, the inverter compressor 1 exits the frequency-reduction mode, and the electronic control box assembly 5 controls the inverter compressor 1 to stop, wherein the first preset humidity W1< the fourth preset humidity W4. The fourth preset humidity W4 is a warning humidity, 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 humidity, it indicates that it is not possible to control to reduce the humidity of the electronic control box assembly 5 by controlling the frequency. At this time, the variable frequency compressor 5 is turned off, the cold quantity of the refrigerant heat dissipation module 6 can be rapidly reduced, the electric control box assembly 5 can evaporate the condensed water by utilizing the waste heat, and the effect of forcibly protecting the electric control box assembly 5 is further achieved.
In some embodiments, the first predetermined humidity W1, the second predetermined humidity W2, the third predetermined humidity W3, and the fourth predetermined humidity W4 are all limited specifically. 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 humidity in the electronic control box assembly 5 is lower than the first preset humidity W1. When the frequency of the variable-frequency compressor 5 is limited due to the fact that the humidity exceeds the first preset humidity W1, the frequency limitation of the variable-frequency compressor 5 is removed when the humidity in the electric control box assembly 5 is lower than the second preset humidity W2, the frequency of the variable-frequency compressor 5 is reduced when the humidity in the electric control box assembly 5 is higher than the third preset humidity W3, and the variable-frequency compressor 5 stops protection when the humidity in the electric control box assembly 5 is higher than the fourth preset humidity W4. Wherein the second preset humidity W2< the first preset humidity W1< the third preset humidity W3< the fourth preset humidity W4.
Further, after the inverter compressor 5 is stopped because the humidity in the electronic control box assembly 5 is higher than the fourth preset humidity W4, and when the humidity in the electronic control box assembly 5 is detected to be reduced to the fifth preset humidity W5, the inverter compressor 1 is restarted. Here the fifth preset humidity W5< the fourth preset humidity W4. Optionally, the second preset humidity W2< the fifth preset humidity W5< the first preset humidity W1.
In the embodiment of the invention, the electronic control box assembly 5 comprises a box body and components arranged in the box body, wherein the components comprise 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 the box body is sealed, external high-humidity air can be reduced from entering the box body, and therefore excessive condensed water can be prevented from being produced in the box body, and further components and parts are prevented from being damaged due to water.
Specifically, the box body is heat-conducting, and box body itself can derive inside heat promptly to improve heat-sinking capability.
Optionally, the electronic control box assembly 5 is filled with a heat conduction layer, and advantageously, the heat conduction layer is an insulation layer, and the heat conduction layer is in contact with the box body and the component respectively, so as to further improve the heat dissipation capability of the electronic control box assembly. Advantageously, the heat conducting layer is in contact with the components and the refrigerant heat dissipation module 6, respectively, so as to enhance the heat dissipation speed of the refrigerant heat dissipation module 6.
In the embodiment of the present invention, the refrigerant heat dissipation module 6 has various structural forms.
In some embodiments, the cooling medium heat dissipation module 6 includes at least one of a heat dissipation plate, a heat dissipation fin, and a heat dissipation fan. That is, the refrigerant heat dissipation module 6 may include a heat dissipation plate, the refrigerant heat dissipation module 6 may include heat dissipation fins, the refrigerant heat dissipation module 6 may include heat dissipation fans, and the refrigerant heat dissipation module 6 may include a heat dissipation plate, heat dissipation fins, and heat dissipation fans, or the refrigerant heat dissipation module 6 may include the above two components.
In some embodiments, the cooling medium heat dissipation module 6 includes a semiconductor cooling plate, a cold end of the semiconductor cooling plate is used for dissipating heat to the electronic control box assembly 5, and a hot end of the semiconductor cooling plate dissipates heat to the outside, so as to improve heat transfer efficiency.
In some embodiments, the coolant heat dissipation module 6 may be formed by combining the coolant heat dissipation tube 61 with one or more of the heat dissipation plate, the heat dissipation fins, the heat dissipation fan, and the semiconductor cooling fins.
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 humidity of the refrigerant heat dissipation pipe 61.
In some embodiments, the refrigerant heat dissipation tube 61 is connected in series or in parallel to the air return tube 11 of the inverter compressor 1, so as to increase the air return humidity 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 cooling module 6 will be described with reference to different embodiments.
In the example shown in fig. 1, the air-conditioning apparatus 100 is a single-refrigerant machine, and the refrigerant/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-refrigerant 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 cooling 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 through the refrigerant cooling pipe 61 and then flows back to the inverter compressor 1 from the reservoir 12.
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 cooling module 6 may be disposed at any position downstream of the indoor heat exchanger 4, with the exhaust port of the compressor as the starting point and the return port as the ending point.
In the example shown in fig. 5, the air-conditioning apparatus 100 is a cooling/heating apparatus, and the refrigerant/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/refrigerant heat dissipation module 6 is connected in series between the exterior heat exchanger 2 and the throttle element 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 cooling module 6 is connected in parallel to the return pipe 11 of the inverter compressor 1, and the refrigerant cooling 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 humidity of the upstream pipe section is slightly higher than that of the downstream pipe section, and at the moment, the pipe sections with different humidities 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.
According to the electric control box assembly 5 of the air conditioning device of the embodiment of the invention, the electric control box assembly 5 cools through the refrigerant heat dissipation pipe 61, and the electric control box assembly 5 comprises: airtight box body and the components and parts of establishing in the box body, automatically controlled box subassembly 5 still includes humidity detection piece, and humidity detection piece is used for detecting the humidity in the box body. Here, the structure of the air conditioning device has been described in the above embodiments, and will not be described in detail here.
Thus, according to the humidity change in the electronic control box assembly 5, the operation conditions of the components in the air conditioning device 100, especially the operation states of the compressor and the throttling element, can be controlled, so that the over-high humidity in the electronic control box assembly 5 is avoided.
According to the electric control box assembly 5 of the air conditioning device, the heat dissipation problem in a high-temperature environment can be solved, and the electric leakage problem caused by condensed water generated by condensation on the refrigerant heat dissipation pipe 61 under high humidity can be prevented by monitoring the change of internal humidity.
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 (14)
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 refrigerant heat dissipation module is used for cooling the electronic control box assembly and comprises refrigerant heat dissipation pipes which are connected in series in a refrigerant circulating system comprising the variable frequency compressor, the outdoor heat exchanger and the throttling element;
the humidity detection component is used for detecting the humidity in the electronic control box component and is electrically connected with the electronic control box component; wherein,
when detecting current humidity in the automatically controlled box subassembly is greater than or equal to first preset humidity W1, the automatically controlled box subassembly obtains inverter compressor's current frequency, and control inverter compressor gets into the limit frequency mode, and in the limit frequency mode current frequency is the upper limit frequency of inverter compressor work, promptly:
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 method as claimed in claim 1, wherein after entering the frequency limiting mode, when detecting that the current humidity in the electronic control box assembly is less than or equal to a second preset humidity W2, the inverter compressor exits the frequency limiting mode and enters a free inverter mode, and the second preset humidity W2< the first preset humidity W1.
3. The control method of the air conditioning device according to claim 1, wherein after entering the frequency limiting mode, when the humidity detection component detects that the current humidity in the electronic control box component is greater than or equal to a third preset humidity W3, the inverter compressor exits the frequency limiting mode and enters the frequency reduction mode, and the electronic control box component controls the inverter compressor to reduce the operating frequency, wherein the first preset humidity W1< the third preset humidity W3.
4. The method as claimed in claim 3, wherein after entering the down-conversion mode, when the current humidity in the electronic control box assembly is detected to be equal to or higher than a fourth preset humidity W4, the inverter compressor exits the down-conversion mode, and the electronic control box assembly controls the inverter compressor to stop, wherein the third preset humidity W3< the fourth preset humidity W4.
5. The control method of the air conditioning device according to claim 4, wherein the inverter compressor is restarted after the humidity detection component detects that the humidity in the electronic control box component is reduced to a fifth preset humidity W5 after the inverter compressor is stopped.
6. The method of claim 1, wherein the refrigerant heat dissipation module comprises a water absorption layer.
7. The method of claim 1, wherein the refrigerant heat dissipation module comprises at least one of a heat dissipation plate, a heat dissipation fin, or a heat dissipation fan.
8. The control method of an air conditioning apparatus according to claim 1, wherein a heat conductive layer is filled in the electric control box assembly.
9. The method of claim 1, wherein the coolant heat dissipation module comprises a semiconductor cooling fin having a cold end for dissipating heat from the electronic control box assembly.
10. The method of claim 1, wherein the refrigerant used in the refrigerant circulation system is R290, R407C, R410A, or R32.
11. The control method of an air conditioning apparatus according to claim 1, wherein the case of the electronic control box assembly is a closed case.
12. The control method of the air conditioning unit according to any one of claims 1 to 11, wherein the air conditioning unit includes two throttling elements, and the refrigerant heat radiating pipe is connected in series between the two throttling elements.
13. The method as claimed in any one of claims 1 to 11, wherein the refrigerant heat pipe is connected in series or in parallel to the return air pipe of the inverter compressor.
14. An air conditioning apparatus characterized by being an air conditioning apparatus that employs the control method of the air conditioning apparatus according to any one of claims 1 to 13.
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| CN111397077B (en) * | 2020-02-24 | 2021-03-23 | 珠海格力电器股份有限公司 | Temperature control method and device, storage medium and air conditioner |
| CN115183337B (en) * | 2022-06-23 | 2023-11-24 | 青岛海尔空调电子有限公司 | Method and device for radiating frequency conversion module of air conditioner and air conditioner |
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