CN113137722A - Method and device for preventing condensation of frequency conversion module and air conditioner - Google Patents
Method and device for preventing condensation of frequency conversion module and air conditioner Download PDFInfo
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- CN113137722A CN113137722A CN202110322297.3A CN202110322297A CN113137722A CN 113137722 A CN113137722 A CN 113137722A CN 202110322297 A CN202110322297 A CN 202110322297A CN 113137722 A CN113137722 A CN 113137722A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 134
- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000009833 condensation Methods 0.000 title claims abstract description 51
- 230000005494 condensation Effects 0.000 title claims abstract description 45
- 239000003507 refrigerant Substances 0.000 claims abstract description 86
- 230000017525 heat dissipation Effects 0.000 claims abstract description 40
- 238000001816 cooling Methods 0.000 abstract description 44
- 238000004891 communication Methods 0.000 description 13
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000004781 supercooling Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
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- 239000007788 liquid Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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Abstract
The application relates to the technical field of air conditioners and discloses a method for preventing condensation of a frequency conversion module, which comprises the following steps: the frequency conversion module is used for dissipating heat through heat conduction contact of a refrigerant pipeline of the air conditioner, the refrigerant pipeline comprises a first heat dissipation pipe and a second heat dissipation pipe, and the temperature of a refrigerant in the first heat dissipation pipe is higher than that of the refrigerant in the second heat dissipation pipe; the method further comprises the following steps: acquiring a first current temperature of the surface of the frequency conversion module and a dew point temperature in an electric control box where the frequency conversion module is located; and controlling the circulation state of the second radiating pipe according to the first current temperature and the dew point temperature. This application is according to first current temperature and dew point temperature, the circulation state of control second cooling tube, and then whether control second stage heat dissipation goes on, avoids the low temperature refrigerant in the second cooling tube directly to dispel the heat to frequency conversion module, reduces frequency conversion module radiator because the temperature crosses the phenomenon that produces the condensation excessively. The application also discloses a device and an air conditioner that are used for frequency conversion module to prevent condensation.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a method and a device for preventing condensation of a frequency conversion module and an air conditioner.
Background
At present, the application of the variable frequency air conditioner is more and more common, wherein a variable frequency power device is an important component in the variable frequency air conditioner, and a multifunctional integrated high-power variable frequency module is mainly adopted to regulate and control the rotating speed of a compressor, so that the energy consumption is saved. The higher the compressor frequency, the more heat is generated by the frequency conversion module.
In the prior art, there is a method of radiating heat by using a single-channel refrigerant radiator as a frequency conversion module. The single-channel refrigerant radiator is structurally characterized in that a refrigerant pipeline penetrates through the aluminum base, wherein two ends of the refrigerant pipeline are arranged on a pipeline behind a throttling element of the air conditioner, for example, two ends of the refrigerant pipeline are arranged on a pipeline between the indoor heat exchanger and the compressor, the temperature of the refrigerant of the pipeline is lower and is about 20 ℃, and the refrigerant with the lower temperature is used for radiating heat for the frequency conversion module.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
in the single channel refrigerant radiator, the aluminum substrate contacts with the frequency conversion module of treating the heat dissipation, and the refrigerant temperature is lower in the single channel refrigerant radiator, and the contact surface of aluminum substrate and frequency conversion module easily produces the condensation, has the risk that the circuit board short circuit burns out.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a method and a device for preventing condensation of a frequency conversion module and an air conditioner, and aims to solve the technical problem that condensation is easily generated on the frequency conversion module.
In some embodiments, the method comprises: the frequency conversion module dissipates heat through heat conduction contact of a refrigerant pipeline of the air conditioner, the refrigerant pipeline comprises a first heat dissipation pipe and a second heat dissipation pipe, and the temperature of a refrigerant in the first heat dissipation pipe is higher than that of the refrigerant in the second heat dissipation pipe; the method further comprises the following steps: acquiring a first current temperature of the surface of the frequency conversion module and a dew point temperature in an electric control box where the frequency conversion module is located; and controlling the circulation state of the second radiating pipe according to the first current temperature and the dew point temperature.
In some embodiments, the apparatus comprises: the frequency conversion module dissipates heat through heat conduction contact of a refrigerant pipeline of the air conditioner, the refrigerant pipeline comprises a first heat dissipation pipe and a second heat dissipation pipe, and the temperature of a refrigerant in the first heat dissipation pipe is higher than that of the refrigerant in the second heat dissipation pipe; the device further comprises: the temperature acquisition module is configured to acquire a first current temperature of the surface of the frequency conversion module and a dew point temperature in an electric control box where the frequency conversion module is located; and the decision module is configured to control the circulation state of the second radiating pipe according to the first current temperature and the dew point temperature.
In some embodiments, the apparatus comprises: comprising a processor and a memory storing program instructions, the processor being configured to perform the aforementioned method for anti-condensation of a frequency conversion module when executing the program instructions.
In some embodiments, the air conditioner includes: the device for preventing condensation of the frequency conversion module is described above.
The method, the device and the air conditioner for preventing condensation of the frequency conversion module provided by the embodiment of the disclosure can realize the following technical effects:
the refrigerant pipeline through the air conditioner dispels the heat to frequency conversion module in this disclosed embodiment, and the refrigerant pipeline includes first cooling tube and second cooling tube, and the refrigerant temperature of first cooling tube is greater than the refrigerant temperature in the second cooling tube, this application carries out the first stage heat dissipation through first cooling tube, carries out the second stage heat dissipation through the second cooling tube, because the refrigerant temperature in the first cooling tube is higher than the refrigerant temperature in the second cooling tube, the heat-sinking capability of frequency conversion module is controlled to the flow state of the second cooling tube that this application mainly belongs to through control low temperature refrigerant, avoids frequency conversion module surface to produce the condensation.
According to the method for preventing the frequency conversion module from condensation, the first current temperature of the surface of the frequency conversion module and the dew point temperature in the electric control box where the frequency conversion module is located are obtained, the circulation state of the second radiating pipe is controlled according to the first current temperature and the dew point temperature, whether second-stage radiating is conducted or not is further controlled, the fact that low-temperature refrigerants in the second radiating pipe directly radiate the frequency conversion module is avoided, and the phenomenon that condensation is generated due to the fact that the temperature of a radiator of the frequency conversion module is too low is reduced.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
FIG. 1 is a schematic diagram of a method for dew prevention of a frequency conversion module according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an air conditioner provided in the embodiment of the present disclosure;
FIG. 3 is a schematic diagram of another method for frequency conversion module condensation prevention provided by the embodiments of the present disclosure;
FIG. 4 is a schematic diagram of another method for frequency conversion module condensation prevention provided by the embodiments of the present disclosure;
FIG. 5 is a schematic view of an apparatus for preventing condensation of a frequency conversion module according to an embodiment of the present disclosure;
fig. 6 is a schematic view of another device for preventing condensation of a frequency conversion module according to an embodiment of the present disclosure.
In the figure, 1: a compressor; 2: a four-way valve; 3: an outdoor heat exchanger; 4: a throttling element; 5: an indoor heat exchanger; 6: a frequency conversion module radiator; 7: a first radiating pipe; 8: a first check valve; 9: a first communicating pipe; 10: a second one-way valve; 11: a second heat dissipation pipe; 12: a first solenoid valve; 13: a second communication line; 14: a second solenoid valve; 15: a temperature acquisition module; 16: and a decision module.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
Referring to fig. 2, an embodiment of the present disclosure provides an air conditioner including a refrigerant circulation pipeline, a first heat dissipation pipe 7 and a second heat dissipation pipe 11.
The refrigerant circulating pipeline comprises a compressor 1, an outdoor heat exchanger 3, a throttling element 4 and an indoor heat exchanger 5 which are sequentially connected in series. The first radiating pipe 7 is connected in parallel to the first communication pipeline 9 between the outdoor heat exchanger 3 and the throttling element 4, and the first radiating pipe 7 is used for carrying out first cooling operation on the frequency conversion module. The second heat dissipation pipe 11 is connected in parallel to a second communication pipeline 13 between the indoor heat exchanger 5 and the compressor 1, and the second heat dissipation pipe 11 is used for performing a second cooling operation on the frequency conversion module. The first communication pipeline 9, the second communication pipeline 13, the first radiating pipe 7 and the second radiating pipe 11 are all provided with valve bodies for controlling the circulation state of the corresponding pipelines. It is understood that the first cooling operation and the second cooling operation may be performed simultaneously.
As an example, the first radiating pipe 7 is provided with a first check valve 8, and the first communication pipe 9 is provided with a second check valve 10. One end of the second radiating pipe 11 close to the indoor heat exchanger 5 is provided with a first electromagnetic valve 12, and a second electromagnetic valve 14 is arranged on the second communication pipeline 13.
When the air conditioner performs a refrigeration cycle, the first check valve 8 and the first electromagnetic valve 12 are in a conducting state, the second check valve 10 and the second electromagnetic valve 14 are in a closing state, a refrigerant flows through the first radiating pipe 7 and the second radiating pipe 11, specifically, the refrigerant flowing through the first radiating pipe 7 is a medium-high temperature liquid refrigerant condensed by the outdoor heat exchanger 3 after being discharged by the compressor 1, the refrigerant flowing through the second radiating pipe 11 is a low-temperature refrigerant discharged after being evaporated and absorbed by the indoor heat exchanger 5, the refrigerant flows through the first radiating pipe 7 and the second radiating pipe 11 and is integrated in the variable frequency module radiator 6, the variable frequency module radiator 6 is in contact heat exchange with the variable frequency module, and the heat of the variable frequency module is taken away by the refrigerant flowing through the first radiating pipe 7 and the second radiating pipe 11 so as to realize the heat dissipation of the variable frequency module; meanwhile, when the temperature of the frequency conversion module is too low, the first electromagnetic valve 12 can be closed and the second electromagnetic valve 14 can be opened to prevent condensation, so that the temperature of the frequency conversion module radiator 6 is increased, and the condensation phenomenon is prevented. The temperature of the medium-high temperature liquid refrigerant is slightly higher than the outdoor environment temperature.
When the air conditioner enters a heating cycle, the first one-way valve 8 is in a closed state, the second one-way valve 10 is in a conducting state, the second electromagnetic valve 14 is opened, the first electromagnetic valve 12 is closed, the first radiating pipe 7 and the second radiating pipe 11 are in short circuit in the heating cycle system of the compressor 1, no refrigerant flows through, and the frequency conversion module can realize heat dissipation through air cooling under the condition of low ring temperature.
Compared with the traditional refrigerant circulation flow path, under the refrigeration working condition of the air conditioner, if the radiating pipe is positioned in front of the throttling element 4 and behind the outdoor heat exchanger 3, the temperature of the refrigerant is higher, and under the environment condition outside a high-environment greenhouse, such as the environment temperature is greater than 43 ℃, the radiating requirement of the frequency conversion module cannot be met, so that the temperature of the frequency conversion module is too high, the frequency conversion module is forced to carry out frequency reduction refrigeration, the refrigeration effect of the compressor 1 system is reduced, meanwhile, the supercooling degree of the refrigerant in front of the throttling element 4 is reduced due to the radiation of the frequency conversion module, the supercooling degree is reduced, the refrigerating capacity of an evaporator behind the throttling element 4 is influenced, and the refrigeration effect of the air conditioner is further influenced; if the cooling tube is located behind throttling element 4, then the radiating temperature of frequency conversion module is easily less than dew point temperature and produces the condensation problem, has the risk of circuit board short circuit burnout.
The scheme adopts a double-refrigerant-ring flow path, the refrigerant in the first radiating pipe 7 is a medium-high temperature refrigerant flowing out of the outdoor heat exchanger 3, the refrigerant in the second radiating pipe 11 is a low-temperature refrigerant flowing out of the indoor heat exchanger 5, wherein the medium-high temperature refrigerant is about 40 ℃, and the low-temperature refrigerant is about 20 ℃. The temperature is adjusted through the heat integration of the first radiating pipe 7 and the second radiating pipe 11, the temperature after integration can be effectively dissipated for the frequency conversion module, and meanwhile, the condensation problem is prevented. Moreover, the heat exchange between the pipelines of the first radiating pipe 7 and the second radiating pipe 11 can be realized while the radiator dissipates heat and reduces the temperature, and the supercooling degree of the refrigerant before the throttling element 4 can be increased by the low-temperature refrigerant after the throttling element 4, so that the refrigeration effect of the air conditioner is improved.
Alternatively, the first radiating pipe 7 is in heat conduction contact with the second radiating pipe 11, which can be understood as that the first radiating pipe 7 is in direct contact with the second radiating pipe 11, and heat is conducted through direct contact; it can also be understood that the first heat pipe 7 and the second heat pipe 11 conduct heat through a heat conducting medium, and at this time, the first heat pipe 7 and the second heat pipe 11 are not in direct contact. For example, the first heat pipe 7 and the second heat pipe 11 are disposed in the heat conducting base, and in this case, the heat conducting base can be used as a heat conducting medium, and the first heat pipe 7 and the second heat pipe 11 exchange heat without direct contact.
Referring to fig. 1 to 4, the present disclosure provides a method for preventing condensation of a frequency conversion module, where the frequency conversion module dissipates heat through heat conduction contact of a refrigerant pipeline of an air conditioner, the refrigerant pipeline includes a first heat dissipation pipe and a second heat dissipation pipe, and a temperature of a refrigerant in the first heat dissipation pipe is higher than a temperature of a refrigerant in the second heat dissipation pipe;
the method for preventing condensation of the frequency conversion module comprises the following steps:
s01, acquiring a first current temperature T of the surface of the frequency conversion module1And the dew point temperature T in the electric control box where the frequency conversion module is positioned0；
S02, according to the first current temperature T1And dew point temperature T0And controlling the circulation state of the second radiating pipe.
Adopt the method that is used for frequency conversion module to prevent condensation that this disclosed embodiment provided, the refrigerant pipeline through the air conditioner dispels the heat to frequency conversion module, the refrigerant pipeline includes first cooling tube 7 and second cooling tube 11, and the refrigerant temperature of first cooling tube 7 is greater than the refrigerant temperature in the second cooling tube 11, this application carries out the first stage heat dissipation through first cooling tube 7, and simultaneously, carry out the second stage heat dissipation through second cooling tube 11, because the refrigerant temperature in first cooling tube 7 is higher than the refrigerant temperature in the second cooling tube 11, frequency conversion module's heat-sinking capability is controlled mainly through the circulation state of the second cooling tube 11 of control low temperature refrigerant place to this application, avoid frequency conversion module surface to produce the condensation.
In the method for preventing condensation of the frequency conversion module, provided by the embodiment of the disclosure, the first current temperature T of the surface of the frequency conversion module is obtained1And the dew point temperature T in the electric control box where the frequency conversion module is positioned0According to the first current temperature T1And dew point temperature T0The circulation state of the second radiating pipe is controlled, and then whether the second-stage radiating is carried out is controlled, so that the direct change of the low-temperature refrigerant in the second radiating pipe is avoidedThe frequency module dissipates heat, and reduces the condensation phenomenon of the frequency conversion module radiator caused by too low temperature.
In practice, a first temperature sensor can be arranged on the frequency conversion module for measuring the temperature T of the surface of the frequency conversion module1The temperature sensor and the humidity sensor are arranged in the electric control box and used for measuring the temperature and the humidity of the air in the electric control box, the theoretical dew point temperature of the air in the electric control box can be calculated through the temperature and the humidity of the air in the electric control box, and a value slightly larger than the theoretical dew point temperature can be determined as the dew point temperature T0. According to the first current temperature T1And dew point temperature T0And controlling the circulation state of the second radiating pipe, wherein the circulation state comprises circulation and non-circulation so as to adjust the radiating strength of the frequency conversion module.
Optionally, step S02, according to the first current temperature T1And dew point temperature T0And controlling the circulation state of the second radiating pipe, comprising:
s21, if the first current temperature T1Less than or equal to dew point temperature T0And the second radiating pipe is controlled not to be communicated.
Can understand that, frequency conversion module's surface temperature is lower, has the risk that generates the condensation, and control second cooling tube does not circulate, makes frequency conversion module radiator mainly dispel the heat by first cooling tube, avoids frequency conversion module radiator to dispel the heat by first cooling tube and second cooling tube simultaneously, makes frequency conversion module temperature continuously reduce, produces the condensation.
Optionally, step S02, according to the first current temperature T1And dew point temperature T0And controlling the circulation state of the second radiating pipe, further comprising:
s22, if the first current temperature T1Greater than or equal to a first threshold temperature Ts1Controlling the circulation of the second radiating pipe;
it will be appreciated that, in practice, the frequency conversion module is provided with a threshold temperature, namely a first threshold temperature Ts1When the first threshold temperature T is exceededs1When the frequency conversion module is burnt, the frequency conversion module needs to be radiated in time to control the circulation of the second radiating pipe,so that the low-temperature refrigerant can radiate the radiator of the frequency conversion module.
S23, optionally, if the first current temperature is greater than or equal to the first threshold temperature, the duration t of the air conditioner is greater than or equal to the preset duration t under the condition of controlling the second heat dissipation pipe to circulates1And controlling the compressor of the air conditioner to enter a frequency modulation mode.
It can be understood that the first current temperature T1Greater than or equal to a first threshold temperature Ts1And when the second radiating pipe is controlled to circulate, the air conditioner continuously circulates for a set time t1Every lapse of a set time t1Checking the running state of the primary equipment, and when the air conditioner continuously and accumulatively works for more than the maximum time t in the states1And the compressor refrigerating system enters a frequency modulation mode, and the running frequency f of the compressor refrigerating system is adjusted, so that the refrigerating effect of the compressor is further controlled, and the temperature of the frequency conversion module is adjusted.
As shown in fig. 3, optionally, the frequency modulation mode includes:
s231, obtaining a second current temperature T of the surface of the frequency conversion module2；
S232, if the second current temperature T2Greater than or equal to a first threshold temperature Ts1Controlling the running frequency f of the compressor to reduce frequency Deltaf until a second current temperature T2Less than a first threshold temperature Ts1(ii) a Alternatively, the first and second electrodes may be,
s233, if the second current temperature T2Less than a first threshold temperature Ts1And controlling the running frequency of the compressor to increase by delta f.
It can be understood that after the compressor enters the frequency modulation mode, the frequency modulation mode is changed according to the surface temperature T of the frequency conversion module2And carrying out free frequency modulation, wherein the second current temperature T is unstable due to the temperature of the frequency conversion module2As a variable, a second current temperature T is acquired periodically2When the second current temperature T is higher than the first current temperature2Greater than or equal to a first threshold temperature Ts1When the temperature of the frequency conversion module is reduced to a reasonable range, namely the second current temperature T, the compressor reduces the frequency delta f to reduce the refrigeration effect, so that the temperature of the frequency conversion module is reduced until the temperature of the frequency conversion module is reduced to a reasonable range2Less than a first threshold temperature Ts1。
In practice, the frequency modulation mode is started at the first current temperature T1Greater than or equal to a first threshold temperature Ts1And the continuous working time t of the air conditioner is more than or equal to the preset time t under the state of controlling the circulation of the second radiating pipes1Therefore, after entering the frequency modulation mode, the temperature of the frequency conversion module generally needs to be reduced by performing the frequency reduction Δ f, in this case, after entering the frequency modulation mode, the frequency reduction operation generally needs to be performed first, and when the second current temperature T is reached2Less than a first threshold temperature Ts1Then, the compressor starts to perform frequency raising action to gradually raise the operating frequency of the compressor, and if the second current temperature T is in the frequency raising process2Again greater than or equal to the threshold temperature Ts1The compressor starts to reduce the frequency again according to the second current temperature T2And adjusting the running frequency of the compressor in real time.
As shown in fig. 3, optionally, after controlling the compressor of the air conditioner to enter the frequency modulation mode, the method further includes:
s234, acquiring the current running frequency f of the compressor1；
S235, according to the current operating frequency f1And determining the operation mode of the air conditioner.
It can be understood that the current operating frequency f of the compressor is monitored in real time after entering the frequency modulation mode1According to the current operating frequency f1And determining the operation mode of the air conditioner.
Optionally, determining an air conditioner operation mode includes:
s236, if the current operation frequency f1Greater than or equal to the set frequency f0Controlling the compressor to exit the frequency modulation mode, and controlling the air conditioner to continue to work for a first set time period t0(ii) a Alternatively, the first and second electrodes may be,
s237, if the current operation frequency f1Less than a set frequency f0And is greater than the threshold frequency fminWhen the frequency modulation mode is started, controlling the compressor to continuously run the frequency modulation mode; alternatively, the first and second electrodes may be,
s238, if the current operation frequency f1Less than or equal to the threshold frequency fminAnd is andsecond current temperature T2Greater than or equal to a first threshold temperature Ts1And when the air conditioner is stopped, controlling the air conditioner to stop.
It can be understood that the operation mode of the air conditioner is based on the current operation frequency f of the compressor1Determining, monitoring the running frequency of the compressor in real time after entering a frequency modulation mode, and monitoring the running frequency at the current running frequency f1Greater than or equal to the set frequency f0In the case where the moving frequency of the compressor has been restored to the target frequency f0Second current temperature T2Is also less than the threshold temperature TS1And the compressor exits the frequency modulation mode, and the air conditioner works normally. Optionally, after the air conditioner normally works, the air conditioner firstly continues to work for a first set time period t0Then, step S01 is performed again, and the temperature adjustment of the inverter module is started again.
At the current operating frequency f1Less than a set frequency f0And is greater than the threshold frequency fminIn the case where the operating frequency of the compressor has not been restored to the normal state, the second current temperature T2The frequency modulation is continuously influenced by the change of the running frequency of the compressor, and the frequency modulation mode is required to be continuously performed for frequency modulation under the condition; at the current operating frequency f1Less than or equal to the threshold frequency fminIn the case of (1), the compressor has already been frequency-down a number of times, if the second current temperature T is present at that time2Is still greater than or equal to the first threshold temperature Ts1The compressor is down-converted to the second current temperature T2The air conditioner has the advantages that the air conditioner does not have an obvious adjusting effect, the compressor reaches the threshold frequency, the service life of the compressor is influenced if the frequency reduction action is carried out again, the air conditioner is controlled to stop and an alarm is given out, and therefore equipment is prevented from being broken down. Optionally, the threshold frequency fminFor the lowest frequency at which the compressor 1 can refrigerate in the current mode, a frequency f is set0The operating frequency of the compressor 1 corresponding to the target temperature set by the user.
Optionally, the frequency of each frequency increasing or reducing is the same, and the frequency modulation mode achieves the purpose of adjusting the refrigeration effect through multiple frequency modulation actions.
Wherein, optionally, the first settingDuration t0Is less than the preset time ts1A first set time period t0Or the time t can be set1The same is true.
Optionally, step S02, according to the first current temperature T1And dew point temperature T, the circulation state of control second cooling tube still includes:
s24, if the first current temperature T1Greater than the dew point temperature T and a first current temperature T1Less than a first threshold temperature Ts1And controlling the second radiating pipe to keep the current circulation state.
It is understood that when the first current temperature T is reached1Greater than the dew point temperature T and a first current temperature T1Less than a first threshold temperature Ts1The frequency conversion module is in a reasonable temperature range, and the current circulation state of the second radiating pipe is kept; when the temperature of the frequency conversion module exceeds the range, the temperature of the frequency conversion module is adjusted by adjusting the circulation state of the second radiating pipe. Therefore, the circulation state of the second radiating pipe can be prevented from being frequently adjusted, and the operation memory of the equipment is prevented from being occupied.
As shown in fig. 4, optionally, the method for preventing condensation of the frequency conversion module further includes:
s03, obtaining the air outlet temperature T of the compressor of the air conditionery。
S04, if the exhaust temperature T is loweryGreater than or equal to a second threshold temperature Ts2And the opening degree of a throttling element of the air conditioner is increased.
The throttling element is arranged between an indoor heat exchanger and an outdoor heat exchanger of the air conditioner.
It will be appreciated that the compressor discharge of the compressor cycle system is provided with a temperature sensor for measuring the compressor discharge temperature TyAnd the compressor discharge port temperature is set to a threshold temperature, i.e., a second threshold temperature Ts2. The temperature of the exhaust port of the compressor is too high, so that the lubricating performance of lubricating oil of the compressor can be damaged, carbon is formed on an air valve channel and a valve plate to damage the compressor, the overheating protection and the refrigeration effect of the compressor are reduced, and the temperature of the exhaust port of the compressor is adjusted by adjusting and increasing the opening of a throttling elementDegree Ty(ii) a When the throttle element opening has opened to a maximum value PmaxAnd (3) stopping the air conditioner and performing alarm protection.
In practical application, temperature sensors can be respectively arranged on a compressor exhaust port and a frequency conversion module of a compressor circulating system to measure the temperature T of the compressor exhaust portyThe temperature of the frequency conversion module and the temperature and humidity sensor are arranged in the electric control box, the theoretical dew point temperature of the air in the electric control box can be calculated through the temperature and the air humidity of the air in the electric control box measured by the temperature and humidity sensor, and the dew point temperature T of the air in the electric control box0Can be slightly larger than the theoretical dew point temperature, and the frequency conversion module sets a first threshold temperature TS1Setting the second valve temperature and pressure T at the air outlet of the compressorS2And the air conditioner is started and works for time t1Then, the air conditioner enters a refrigeration cycle and executes the method for preventing condensation of the frequency conversion module, and after the air conditioner meets the normal operation condition, the air conditioner works for a set time t1And then entering the next cycle.
When the system is in a refrigeration cycle:
if the temperature of the frequency conversion module is less than or equal to the dew point temperature T0In order to prevent the frequency conversion module from being condensed, if the temperature of the frequency conversion radiator needs to be increased, the second electromagnetic valve is opened, and the first electromagnetic valve is closed, so that the second radiating pipe is disconnected;
if the temperature of the frequency conversion module is greater than the dew point temperature T0And the temperature T of the frequency conversion module1Less than a first threshold temperature TS1The first electromagnetic valve and the second electromagnetic valve are kept unchanged in the existing state;
if the temperature of the frequency conversion module is greater than or equal to the first threshold temperature TS1In order to prevent the frequency conversion module from being burnt out due to overhigh temperature, and the temperature of the frequency conversion radiator needs to be reduced, the second electromagnetic valve is closed, and the first electromagnetic valve is opened, so that the second radiating pipe is connected in parallel to enter the frequency conversion radiator; when the temperature of the frequency conversion module of the air conditioner is greater than or equal to a first threshold temperature TS1Closing the second electromagnetic valve and opening the first electromagnetic valve for a continuous cycle working time t, wherein the working time t is every1Checking the operating state of the primary apparatus for a maximum operating time ts1When is coming into contact withIn this state, the air conditioner continuously and cumulatively operates for more than the maximum time ts1If t is greater than or equal to ts1The compressor enters a frequency modulation mode, the running frequency of the compressor is adjusted, the temperature of the frequency conversion module is reduced by reducing the frequency delta f until the temperature of the frequency conversion module is reduced to a reasonable interval, and if the temperature of the frequency conversion module is reduced to the lowest running frequency fminStopping protection when the temperature of the rear frequency conversion module is still not reduced to a reasonable interval, and recovering the compressor to the set frequency f0If so, exiting the frequency modulation mode and entering a refrigeration cycle adjusting system under the normal working condition;
when the temperature T of the compressor discharge portyGreater than or equal to a compressor discharge port threshold temperature TS2In order to prevent the excessive temperature of the exhaust port of the compressor from damaging the lubricating performance of the lubricating oil of the compressor and causing carbon deposition on an air valve channel and a valve plate to damage the compressor, the overheating protection and the refrigeration effect of the compressor are reduced, and the temperature T of the exhaust port of the compressor is adjusted by adjusting and increasing the opening degree of a throttle valvey(ii) a When the throttle valve opening has opened to the maximum value PmaxAnd (3) stopping the air conditioner and performing alarm protection.
The refrigerant pipeline through the air conditioner dispels the heat to frequency conversion module in this disclosed embodiment, and the refrigerant pipeline includes first cooling tube and second cooling tube, and the refrigerant temperature of first cooling tube is greater than the refrigerant temperature in the second cooling tube, this application carries out the first stage heat dissipation through first cooling tube, carries out the second stage heat dissipation through the second cooling tube, because the refrigerant temperature in the first cooling tube is higher than the refrigerant temperature in the second cooling tube, the heat-sinking capability of frequency conversion module is controlled to the flow state of the second cooling tube that this application mainly belongs to through control low temperature refrigerant, avoids frequency conversion module surface to produce the condensation.
According to the method for preventing the frequency conversion module from condensation, the first current temperature of the surface of the frequency conversion module and the dew point temperature in the electric control box where the frequency conversion module is located are obtained, the circulation state of the second radiating pipe is controlled according to the first current temperature and the dew point temperature, whether second-stage radiating is conducted or not is further controlled, the fact that low-temperature refrigerants in the second radiating pipe directly radiate the frequency conversion module is avoided, and the phenomenon that condensation is generated due to the fact that the temperature of a radiator of the frequency conversion module is too low is reduced.
The embodiment of the disclosure provides a device for frequency conversion module prevents condensation, and frequency conversion module dispels the heat through the refrigerant pipeline heat conduction contact of air conditioner, and the refrigerant pipeline includes first cooling tube and second cooling tube, and the refrigerant temperature in the first cooling tube is greater than the refrigerant temperature in the second cooling tube.
As shown in fig. 5, the device for preventing condensation of the frequency conversion module includes: a temperature acquisition module 15 and a decision module 16.
The temperature acquisition module 15 is configured to acquire a first current temperature T of the surface of the frequency conversion module1And the dew point temperature T in the electric control box where the frequency conversion module is positioned0；
The decision module 16 is configured to determine the first current temperature T1And dew point temperature T0And controlling the circulation state of the second radiating pipe.
The foregoing embodiments of the method for preventing condensation of the frequency conversion module may also be applied to the device for preventing condensation of the frequency conversion module, and are not described herein again.
As shown in fig. 6, an apparatus for preventing condensation of a frequency conversion module according to an embodiment of the present disclosure includes a processor (processor)100 and a memory (memory) 101. Optionally, the apparatus may also include a Communication Interface (Communication Interface)102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via a bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to perform the method for variable frequency module anti-condensation of the above embodiments.
In addition, the logic instructions in the memory 101 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 101, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes functional applications and data processing by executing program instructions/modules stored in the memory 101, that is, implements the method for preventing condensation of the frequency conversion module in the above embodiments.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides an air conditioner, which comprises the device for preventing condensation of the frequency conversion module.
The disclosed embodiments provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described method for frequency conversion module condensation prevention.
The disclosed embodiments provide a computer program product comprising a computer program stored on a computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the above-described method for frequency conversion module anti-condensation.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method or device comprising the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit may be merely a division of a logical function, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. The method for preventing the condensation of the frequency conversion module is characterized in that the frequency conversion module dissipates heat through the heat conduction contact of a refrigerant pipeline of an air conditioner, the refrigerant pipeline comprises a first heat dissipation pipe and a second heat dissipation pipe, and the temperature of a refrigerant in the first heat dissipation pipe is higher than that of a refrigerant in the second heat dissipation pipe;
the method comprises the following steps:
acquiring a first current temperature of the surface of the frequency conversion module and a dew point temperature in an electric control box where the frequency conversion module is located;
and controlling the circulation state of the second radiating pipe according to the first current temperature and the dew point temperature.
2. The method as claimed in claim 1, wherein the controlling the circulation state of the second radiating pipe according to the first current temperature and the dew point temperature comprises:
if the first current temperature is less than or equal to the dew point temperature, controlling the second radiating pipe not to be communicated; alternatively, the first and second electrodes may be,
and if the first current temperature is greater than or equal to a first threshold temperature, controlling the second radiating pipe to circulate.
3. The method of claim 2,
if the first current temperature is larger than or equal to the first threshold temperature, the second radiating pipe is controlled to be in a circulating state, the continuous working time of the air conditioner is larger than or equal to the preset time, and the compressor of the air conditioner is controlled to enter a frequency modulation mode.
4. The method of claim 3, wherein the frequency modulation mode comprises:
acquiring a second current temperature of the surface of the frequency conversion module;
if the second current temperature is greater than or equal to the first threshold temperature, controlling the running frequency of the compressor to reduce the frequency until the second current temperature is less than the first threshold temperature; alternatively, the first and second electrodes may be,
and if the second current temperature is lower than the first threshold temperature, controlling the running frequency of the compressor to increase.
5. The method as claimed in claim 3, wherein after controlling the compressor of the air conditioner to enter the frequency modulation mode, the method further comprises:
acquiring the current operating frequency of the compressor;
and determining the operation mode of the air conditioner according to the current operation frequency.
6. The method of claim 5, wherein the determining the air conditioner operation mode comprises:
if the current operating frequency is greater than or equal to a set frequency, controlling the compressor to exit the frequency modulation mode, and controlling the air conditioner to continue to work for a first set time; alternatively, the first and second electrodes may be,
if the current running frequency is smaller than the set frequency and larger than a threshold frequency, controlling the compressor to continue running the frequency modulation mode; alternatively, the first and second electrodes may be,
and if the current operating frequency is less than or equal to the threshold frequency and the second current temperature is greater than or equal to the first threshold temperature, controlling the air conditioner to stop.
7. The method of claim 1, further comprising:
acquiring the temperature of an exhaust port of a compressor of the air conditioner;
if the temperature of the exhaust port is greater than or equal to a second threshold temperature, the opening degree of a throttling element of the air conditioner is increased;
wherein the throttling element is arranged between an indoor heat exchanger and an outdoor heat exchanger of the air conditioner.
8. The device for preventing the frequency conversion module from condensation is characterized in that the frequency conversion module dissipates heat through heat conduction contact of a refrigerant pipeline of an air conditioner, the refrigerant pipeline comprises a first heat dissipation pipe and a second heat dissipation pipe, and the temperature of a refrigerant in the first heat dissipation pipe is higher than that of a refrigerant in the second heat dissipation pipe;
the device comprises:
the temperature acquisition module is configured to acquire a first current temperature of the surface of the frequency conversion module and a dew point temperature in an electric control box where the frequency conversion module is located;
and the decision module is configured to control the circulation state of the second radiating pipe according to the first current temperature and the dew point temperature.
9. An apparatus for variable frequency module anti-condensation, comprising a processor and a memory storing program instructions, characterized in that the processor is configured to perform the method for variable frequency module anti-condensation according to any one of claims 1 to 7 when executing the program instructions.
10. An air conditioner characterized by comprising the device for inverter module anti-condensation as claimed in claim 8 or 9.
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| CN202110322297.3A CN113137722A (en) | 2021-03-25 | 2021-03-25 | Method and device for preventing condensation of frequency conversion module and air conditioner |
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| CN202110322297.3A CN113137722A (en) | 2021-03-25 | 2021-03-25 | Method and device for preventing condensation of frequency conversion module and air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113993361A (en) * | 2021-12-31 | 2022-01-28 | 天津飞旋科技股份有限公司 | Cooling water unit frequency converter refrigerant cooling system |
| 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 |
| CN114659170A (en) * | 2022-03-28 | 2022-06-24 | 青岛海尔空调器有限总公司 | Method and device for controlling fresh air conditioner, fresh air conditioner and storage medium |
| WO2024045636A1 (en) * | 2022-08-27 | 2024-03-07 | 广东美的暖通设备有限公司 | Temperature adjusting method, electric control box, anti-condensation control method and air conditioner |
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2021
- 2021-03-25 CN CN202110322297.3A patent/CN113137722A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN113993361A (en) * | 2021-12-31 | 2022-01-28 | 天津飞旋科技股份有限公司 | Cooling water unit frequency converter refrigerant cooling system |
| CN113993361B (en) * | 2021-12-31 | 2022-04-22 | 天津飞旋科技股份有限公司 | Cooling water unit frequency converter refrigerant cooling system |
| CN114659170A (en) * | 2022-03-28 | 2022-06-24 | 青岛海尔空调器有限总公司 | Method and device for controlling fresh air conditioner, fresh air conditioner and storage medium |
| CN114659170B (en) * | 2022-03-28 | 2024-04-26 | 青岛海尔空调器有限总公司 | Method and device for controlling fresh air conditioner, fresh air conditioner and storage medium |
| WO2024045636A1 (en) * | 2022-08-27 | 2024-03-07 | 广东美的暖通设备有限公司 | Temperature adjusting method, electric control box, anti-condensation control method and air conditioner |
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