CN115727478B - Frostless control method and system for air conditioning unit and air conditioner - Google Patents
Frostless control method and system for air conditioning unit and air conditioner Download PDFInfo
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- CN115727478B CN115727478B CN202211456620.7A CN202211456620A CN115727478B CN 115727478 B CN115727478 B CN 115727478B CN 202211456620 A CN202211456620 A CN 202211456620A CN 115727478 B CN115727478 B CN 115727478B
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000004378 air conditioning Methods 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000003507 refrigerant Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 11
- 230000002265 prevention Effects 0.000 description 5
- 238000007791 dehumidification Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention relates to the technical field of air conditioning units, in particular to a frostless control method, a frostless control system and an air conditioner of an air conditioning unit, which are used for acquiring a reference humidity value of the air conditioning unit in a current state, calculating a dew point temperature according to the reference humidity value and an environment temperature, regulating an output frequency and an operation time of a compressor according to a difference value between an evaporator temperature and the dew point temperature and a difference value between an indoor environment temperature and a user set temperature.
Description
Technical Field
The invention relates to the technical field of air conditioning units, in particular to a frostless control method and system of an air conditioning unit and an air conditioner.
Background
The dew point temperature refers to the temperature at which air cools to saturation without changing both the moisture content and the air pressure. It is the temperature at which the vapor in the air becomes dew, and is also called the frost point temperature.
In winter, when the outdoor environment temperature is very low, the temperature of the evaporator side is low when the unit heats, once the temperature is lower than the dew point temperature, the evaporator side can frost, the heat exchange capacity of the unit is affected in the frosting state, defrosting treatment is needed under the condition, and the energy efficiency of the unit can be affected. The traditional defrosting control method is that data of a temperature sensor and a humidity sensor are directly obtained to judge frosting conditions. In this case, if the temperature sensor and/or the humidity sensor fails or fails, the unit cannot be operated normally.
Disclosure of Invention
In view of the above, the invention aims to provide a frostless control method and a frostless control system for an air conditioning unit and the air conditioning unit, so as to solve the problems that in the prior art, when the unit is frosted, the energy efficiency of the unit is affected, and when a temperature sensor and/or a humidity sensor fails or fails, the unit cannot normally operate.
According to a first aspect of an embodiment of the present invention, there is provided a method for controlling frosting prevention of an air conditioning unit, including:
acquiring a reference humidity value of an air conditioning unit in a current state;
Calculating to obtain dew point temperature according to the reference humidity value and the outdoor environment temperature;
According to the difference between the evaporator temperature and the dew point temperature and the difference between the indoor environment temperature and the user set temperature, adjusting the output frequency and the running time of the compressor; the evaporator temperature is the saturation temperature of the refrigerant inlet of the fin heat exchanger.
Preferably, the acquiring the reference humidity value of the air conditioning unit in the current state includes:
Calculating actual capacity data of the unit in the current state;
and finding out a corresponding reference humidity value in a pre-database according to the actual capacity data and the outdoor environment temperature in the current state.
Preferably, the pre-database at least includes: and under the conditions of different temperatures and humidity, the capacity data of the unit in a set state.
Preferably, the setting state includes at least one of: compressor frequency, throttle opening and wind gear parameters of the unit.
Preferably, the actual capability data is:
the product of the difference between the water inlet temperature and the water outlet temperature and the water flow.
Preferably, the adjusting the output frequency and the operation time of the compressor according to the difference between the evaporator temperature and the dew point temperature and the difference between the indoor environment temperature and the user-set temperature includes:
if the difference between the evaporator temperature and the dew point temperature is greater than a preset temperature, judging whether the indoor environment temperature is greater than a user set temperature;
if yes, the compressor reduces the first preset frequency and operates for a first preset time period;
if not, the compressor increases the second preset frequency and operates for a second preset period of time.
Preferably, the method further comprises:
if the difference between the evaporator temperature and the dew point temperature is smaller than or equal to the preset temperature and the evaporator temperature is larger than the dew point temperature, judging whether the indoor environment temperature is larger than the user set temperature;
if yes, the compressor reduces a third preset frequency and operates for a third preset time period;
If not, the compressor increases the fourth preset frequency and operates for a fourth preset time period.
Preferably, the method further comprises: if the difference between the evaporator temperature and the dew point temperature is less than or equal to the preset temperature and the evaporator temperature is less than or equal to the dew point temperature, judging whether the indoor environment temperature is greater than the user set temperature;
if yes, the compressor reduces the fifth preset frequency and runs for a fifth preset time period;
if not, the compressor increases the sixth preset frequency or maintains the output frequency of the compressor, and operates for the sixth preset time period.
Preferably, the method further comprises: if not, the compressor increases the sixth preset frequency or maintains the output frequency of the compressor, and operates for a sixth preset time period, specifically: judging whether the indoor heating rate is greater than zero;
if yes, maintaining the output frequency of the compressor, and running for a sixth preset time period;
If not, the compressor increases the sixth preset frequency and operates for a sixth preset period of time.
Preferably, the first preset frequency is smaller than the third preset frequency and smaller than the fifth preset frequency, and the first preset time period is longer than the third preset time period and longer than the fifth preset time period;
The second preset frequency is greater than the fourth preset frequency and greater than the sixth preset frequency, and the second preset time period is greater than the fourth preset time period and greater than the sixth preset time period.
According to a second aspect of an embodiment of the present invention, there is provided an air conditioning unit frosting prevention control system, including:
the acquisition module is used for acquiring a reference humidity value of the air conditioning unit in the current state;
The calculation module is used for calculating the dew point temperature according to the reference humidity value and the ambient temperature;
And the adjusting module is used for adjusting the output frequency and the running time of the compressor according to the difference value between the temperature of the evaporator and the dew point temperature and the difference value between the indoor environment temperature and the temperature set by a user.
According to a third aspect of an embodiment of the present invention, there is provided an air conditioner including:
At least one processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method described above.
The technical scheme provided by the embodiment of the invention can comprise the following beneficial effects:
According to the technical scheme, the dew point temperature is calculated by acquiring the reference humidity value, when a temperature sensor and a humidity sensor fail or fail, the normal operation of the air conditioning unit is ensured, and the output frequency and the operation time of the compressor are adjusted according to the relation between the evaporation temperature and the dew point temperature and the relation between the indoor environment temperature and the user set temperature, so that the air conditioning unit can stably operate without frosting for a long time.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a flow chart illustrating a method of controlling frosting free of an air conditioning unit according to an exemplary embodiment;
FIG. 2 is a flow chart illustrating a method of controlling frosting prevention of an air conditioning unit according to another exemplary embodiment;
FIG. 3 is a block diagram illustrating an air conditioning unit frosting free control system according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the accompanying claims.
Example 1
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for controlling frosting prevention of an air conditioning unit according to an exemplary embodiment, as shown in fig. 1, the method includes:
step S01, acquiring a reference humidity value of an air conditioning unit in a current state;
Step S02, calculating to obtain dew point temperature according to the reference humidity value and the outdoor environment temperature;
Step S03, adjusting the output frequency and the running time of the compressor according to the difference value between the temperature of the evaporator and the dew point temperature and the difference value between the indoor environment temperature and the temperature set by a user; the evaporator temperature is the saturation temperature of the refrigerant inlet of the fin heat exchanger.
It should be noted that, in the heating mode of the air conditioning units (water cooling unit or air cooling unit) of wall-hanging type, cabinet type, etc. in the application occasions, the control method for preventing frosting of the air conditioning unit in the dehumidification mode, the air supply mode and the refrigeration mode is not started.
The user-set temperature is a target water temperature in the water cooling unit, and is a target indoor temperature in the air cooling unit, that is, a target temperature set by the user.
The user set temperature is a temperature value set by the user through an air conditioner remote controller, an APP of a mobile terminal and the like.
In this embodiment, the reference humidity value of the air conditioning unit in the current state is obtained, the dew point temperature is calculated according to the reference humidity value and the ambient temperature, the output frequency and the operation time of the compressor are adjusted according to the difference value between the evaporator temperature and the dew point temperature and the difference value between the indoor ambient temperature and the user set temperature.
In specific practice, in step S01, a reference humidity value of an air conditioning unit in a current state is obtained, and one of the following implementation manners is:
Calculating actual capacity data of the unit in the current state;
and finding out a corresponding reference humidity value in a pre-database according to the actual capacity data and the outdoor environment temperature in the current state.
In specific practice, the pre-database includes at least: and under the conditions of different temperatures and humidity, the capacity data of the unit in a set state.
In specific practice, the setting state includes at least one of: compressor frequency, throttle opening and wind gear parameters of the unit.
Specifically, taking a water cooling unit as an example, the capacity data represents the heating capacity of the air conditioning unit, the capacity data is high when the heating capacity is large, the capacity data is low when the heating capacity is small, the capacity data is calculated by the product of the difference value of the water inlet temperature and the water outlet temperature and the water flow, and the calculation formula is as follows: q=cm Δt, where Δt is equal to the inlet water temperature minus the outlet water temperature, c represents the specific heat capacity of water, and m is the mass of water.
When the actual capacity data is needed to be described, before the actual capacity data is calculated, the unit needs to be actually started to operate in an outdoor environment, the outdoor environment temperature and the indoor environment temperature in the current state are detected, and the set time is set in a set operation state after the set operation period is reached, wherein the set time is set by the unit under the operation parameters such as fixed compressor frequency, fixed throttle opening, wind gear and the like, the set time is the time with stable performance after the set state is set, the set time can be set according to historical experience or according to actual needs, and the set time can be generally set to 10-30min.
Specifically, the pre-data is data recorded by testing the air conditioning unit during development and design, and the pre-data comprises: different dry balls, wet balls, capacity data of the unit (heating capacity of the unit) and the like under the conditions of different environmental temperatures and different humidities.
It should be noted that, the application of the front data means that the utilization rate of test output in the process of developing the unit is maximized, and the unit operation can be effectively controlled under the condition that the temperature and humidity sensors fail or are canceled, so that the comfort level of users is improved.
It should be noted that, the actual capacity data in this embodiment is calculated according to the inlet water temperature, the outlet water temperature and the water flow, and in combination with the current ambient temperature, the corresponding reference humidity value can be found in the pre-database, the measurement of the humidity sensor is not needed, and the normal operation of the unit can still be controlled under the condition that the humidity sensor fails. Specifically, the dew point temperature is calculated according to the humidity value in the prior art, which is not described in detail in this embodiment.
In specific practice, step S03, adjusting the output frequency and the operation time of the compressor according to the difference between the evaporator temperature and the dew point temperature and the difference between the indoor environment temperature and the user-set temperature, has various implementation manners,
1) If the difference between the evaporator temperature and the dew point temperature is greater than a preset temperature, judging whether the indoor environment temperature is greater than a user set temperature;
if yes, the compressor reduces the first preset frequency and operates for a first preset time period;
if not, the compressor increases the second preset frequency and operates for a second preset period of time.
2) Further comprises:
if the difference between the evaporator temperature and the dew point temperature is smaller than or equal to the preset temperature and the evaporator temperature is larger than the dew point temperature, judging whether the indoor environment temperature is larger than the user set temperature;
if yes, the compressor reduces a third preset frequency and operates for a third preset time period;
If not, the compressor increases the fourth preset frequency and operates for a fourth preset time period.
3) Further comprises:
if the difference between the evaporator temperature and the dew point temperature is less than or equal to the preset temperature and the evaporator temperature is less than or equal to the dew point temperature, judging whether the indoor environment temperature is greater than the user set temperature;
if yes, the compressor reduces the fifth preset frequency and runs for a fifth preset time period;
if not, the compressor increases the sixth preset frequency or maintains the output frequency of the compressor, and operates for the sixth preset time period.
4) Specifically, if not, the sixth preset frequency is increased or the output frequency of the compressor is maintained, and the sixth preset duration is operated, specifically: judging whether the indoor heating rate is greater than zero;
if yes, maintaining the output frequency of the compressor, and running for a sixth preset time period;
If not, the compressor increases the sixth preset frequency and operates for a sixth preset period of time.
The first preset frequency is smaller than the third preset frequency and smaller than the fifth preset frequency, and the first preset time period is longer than the third preset time period and longer than the fifth preset time period;
The second preset frequency is greater than the fourth preset frequency and greater than the sixth preset frequency, and the second preset time period is greater than the fourth preset time period and greater than the sixth preset time period.
Specifically, the preset temperature may be 0 to 5 ℃, specifically, the preset temperature may be 2 ℃;
the first preset frequency may be 1-3 Hz, specifically, the first preset frequency is 2Hz;
the second preset frequency may be 7-9 Hz, specifically, the second preset frequency is 8Hz;
the third preset frequency may be 4-6 Hz, specifically, the third preset frequency is 5Hz;
the fourth preset frequency may be 4-6 Hz, specifically, the fourth preset frequency is 5Hz;
the fifth preset frequency may be 7 to 9Hz, specifically, the fifth preset frequency is 8Hz;
The sixth preset frequency may be 1 to 3Hz, specifically, the sixth preset frequency is 2Hz;
The first preset duration may be 5 to 10 minutes, and specifically, the first preset duration may be 5 minutes;
the second preset time period may be 5 to 10 minutes, and specifically, the second preset time period may be 5 minutes;
the third preset duration may be 2 to 4 minutes, specifically, the third preset duration may be 3 minutes;
the fourth preset duration may be 2 to 4 minutes, specifically, the fourth preset duration may be 3 minutes;
the fifth preset time period may be 0.5 to 2 minutes, and specifically, the fifth preset time period may be 1 minute;
the sixth preset time period may be 0.5 to 2 minutes, and specifically, the sixth preset time period may be 1 minute;
If the evaporator temperature is 5 ℃, the dew point temperature is 0 ℃, the difference is 5 (there is no risk of frosting), the temperature is greater than the preset temperature of 2 ℃, the indoor environment temperature is 25 ℃, the user set temperature is 20 ℃, the output frequency of the compressor of 2Hz is reduced, and the operation is performed for 5min.
If the evaporator temperature is 5 ℃, the dew point temperature is 0 ℃, the difference is 5 (no risk of frosting exists), the temperature is greater than the preset temperature of 2 ℃, the indoor environment temperature is 20 ℃, the user set temperature is 25 ℃, the output frequency of the 8Hz compressor is increased, and the operation is performed for 5min.
If the evaporator temperature is 1 ℃, the dew point temperature is 0 ℃, the difference is 1, the temperature is less than the preset temperature of 2 ℃, but the evaporator temperature is greater than the dew point temperature, and the indoor environment temperature is 25 ℃ greater than the user set temperature of 20 ℃, the output frequency of the compressor of 5Hz is reduced, and the operation is performed for 3min.
If the evaporator temperature is 1 ℃, the dew point temperature is 0 ℃, the difference is 1, the temperature is less than the preset temperature of 2 ℃, but the evaporator temperature is more than the dew point temperature, and the indoor environment temperature is 20 ℃ less than the user set temperature of 25 ℃, the output frequency of the compressor of 5Hz is increased, and the operation is performed for 3min.
If the evaporator temperature is-2 ℃, the dew point temperature is 0 ℃, the difference is-2 (the risk of frosting exists), the temperature is less than the preset temperature of 2 ℃, the indoor environment temperature is 25 ℃ and is greater than the user set temperature of 20 ℃, the output frequency of the 8Hz compressor is reduced, and the operation is performed for 1min.
If the evaporator temperature is-2 ℃, the dew point temperature is 0 ℃, the difference is-2 (the risk of frosting exists), the temperature is less than the preset temperature of 2 ℃, the indoor environment temperature is 20 ℃, the user set temperature is 25 ℃, if the indoor temperature rising rate is greater than 0 at this time, the output frequency of the compressor is maintained, the operation time is 1min, and if the indoor temperature rising rate is less than or equal to 0 at this time, the output frequency of the compressor is increased by 2Hz, and the operation time is 1min.
After reaching the preset time, the evaporator temperature and the dew point temperature and the indoor environment temperature and the user set temperature are detected, so that dynamic balance is realized, and the air conditioning unit is ensured not to frost.
Referring to fig. 2, fig. 2 is a flowchart illustrating a method for controlling frosting prevention of an air conditioning unit according to another exemplary embodiment, as shown in fig. 2, the method includes:
Step S11, under different temperature and humidity states, the unit acquires corresponding capacity data b in a set state a and stores the capacity data b in a pre-database;
Step S12, starting up (outdoor environment);
step S13, normal operation is performed, outdoor environment temperature is detected, and indoor environment temperature is detected;
step S14, a set operation period is reached, and the unit operates the computer unit capacity b' (actual operation) in a set state a;
Step S15, finding out a corresponding reference humidity value according to the environmental temperature of the unit in the current state and the unit capacity b' in a preposed database;
step S16, according to the reference humidity value and the outdoor environment temperature, finding out the corresponding dew point temperature in a front database;
step S17, judging whether T Steaming -C is larger than T Dew ; if yes, go to step S18; if not, go to step S20;
Step S18, if yes, judging whether T Room temperature is larger than T Target object ;
step S19, if yes, reducing the output capacity b1 of the compressor, running time t1, and turning to step S13;
If not, the output capacity a1 of the compressor is improved, the operation time t1 is increased, and the process goes to the step S13;
Step S20, if not, judging whether T Steaming is larger than T Dew , if so, turning to step S21, and if not, turning to step S23;
Whether T Room temperature is greater than T Target object ;
Step S21, judging whether T Room temperature is larger than T Target object ;
step S22, if yes, reducing the output capacity b2 of the compressor, running time t2, and turning to step S13;
if not, the output capacity a2 of the compressor is improved, the operation time t2 is increased, and the process goes to the step S13;
Step S23, judging whether T Room temperature is larger than T Target object ;
Step S24, if yes, reducing the output capacity b3 of the compressor, running time t2, and turning to step S13;
Step S25, if not, judging whether the indoor temperature rising rate is greater than 0;
Step S26, if yes, maintaining the output capacity of the compressor, running for time t3, and turning to step S13;
if not, the compressor output capacity a3 is increased, the operation time t3 is increased, and the process proceeds to step S13.
It should be noted that, the running time t1 > t2 > t3; the output capacity a1 > a2 > a3 of the compressor is improved; reduced compressor output capacity b3 > b2 > b1; wherein, ttarget represents the user set temperature.
Example two
FIG. 3 is a block diagram of an air conditioning unit frost free control system 300, according to an exemplary embodiment, as shown in FIG. 3, the system includes:
the acquiring module 301 is configured to acquire a reference humidity value of an air conditioning unit in a current state;
A calculating module 302, configured to calculate a dew point temperature according to the reference humidity value and the ambient temperature;
the adjusting module 303 is configured to adjust the output frequency and the operation time of the compressor according to the difference between the evaporator temperature and the dew point temperature and the difference between the indoor environment temperature and the user-set temperature.
It should be noted that, in the heating mode of the air conditioning units (water cooling unit or air cooling unit) of wall-hanging type, cabinet type, etc. in the application occasions, the control method for preventing frosting of the air conditioning unit in the dehumidification mode, the air supply mode and the refrigeration mode is not started.
The user-set temperature is a target water temperature in the water cooling unit, and is a target indoor temperature in the air cooling unit, that is, a target temperature set by the user.
It should be noted that, in this embodiment, the obtaining module 301 is configured to obtain a reference humidity value of an air conditioning unit in a current state, the calculating module 302 is configured to calculate a dew point temperature according to the reference humidity value and an ambient temperature, the adjusting module 303 is configured to adjust an output frequency and an operation time of the compressor according to a difference value between an evaporator temperature and the dew point temperature and a difference value between an indoor ambient temperature and a user set temperature, and in the technical scheme of the embodiment, the dew point temperature is calculated by obtaining the reference humidity value, when a temperature sensor and a humidity sensor fail or fail, normal operation of the unit is ensured, and the output frequency and the operation time of the compressor are adjusted according to a relationship between the evaporation temperature and the dew point temperature and a relationship between the indoor ambient temperature and the user set temperature, so that the unit is stably operated and does not frost for a long time.
Example III
An air conditioner, comprising:
At least one processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method described above.
It should be noted that, in the heating mode of the air conditioning units (water cooling unit or air cooling unit) of wall-hanging type, cabinet type, etc. in the application occasions, the control method for preventing frosting of the air conditioning unit in the dehumidification mode, the air supply mode and the refrigeration mode is not started.
It should be noted that, since the implementation manner of each module in the embodiment can be referred to the related description in the first embodiment, the description of the embodiment is omitted.
It is to be understood that the same or similar parts in the above embodiments may be referred to each other, and that in some embodiments, the same or similar parts in other embodiments may be referred to.
It should be noted that in the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "plurality" means at least two.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. 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 present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. The frosting-free control method for the air conditioning unit is characterized by comprising the following steps of:
acquiring a reference humidity value of an air conditioning unit in a current state;
Calculating to obtain dew point temperature according to the reference humidity value and the outdoor environment temperature;
According to the difference between the evaporator temperature and the dew point temperature and the difference between the indoor environment temperature and the user set temperature, the output frequency and the running time of the compressor are adjusted, and the method comprises the following steps:
if the difference between the evaporator temperature and the dew point temperature is greater than a preset temperature, judging whether the indoor environment temperature is greater than a user set temperature;
if yes, the compressor reduces the first preset frequency and operates for a first preset time period;
if not, the compressor increases a second preset frequency and operates for a second preset time period;
Further comprises:
if the difference between the evaporator temperature and the dew point temperature is smaller than or equal to the preset temperature and the evaporator temperature is larger than the dew point temperature, judging whether the indoor environment temperature is larger than the user set temperature;
if yes, the compressor reduces a third preset frequency and operates for a third preset time period;
if not, the compressor increases a fourth preset frequency and operates for a fourth preset time period;
The first preset frequency is smaller than the third preset frequency, and the first preset time period is longer than the third preset time period; the second preset frequency is larger than the fourth preset frequency, and the second preset time period is longer than the fourth preset time period;
the evaporator temperature is the saturation temperature of the refrigerant inlet of the fin heat exchanger.
2. The method according to claim 1, wherein the obtaining the reference humidity value of the air conditioning unit in the current state includes:
Calculating actual capacity data of the unit in the current state;
and finding out a corresponding reference humidity value in a pre-database according to the actual capacity data and the outdoor environment temperature in the current state.
3. The method according to claim 2, wherein the pre-database comprises at least: and under the conditions of different temperatures and humidity, the capacity data of the unit in a set state.
4. A method according to claim 3, wherein the set state comprises at least one of: compressor frequency, throttle opening and wind gear parameters of the unit.
5. The method of claim 2, wherein the actual capability data is:
the product of the difference between the water inlet temperature and the water outlet temperature and the water flow.
6. The method according to claim 1, characterized in that the method further comprises: if the difference between the evaporator temperature and the dew point temperature is less than or equal to the preset temperature and the evaporator temperature is less than or equal to the dew point temperature, judging whether the indoor environment temperature is greater than the user set temperature;
if yes, the compressor reduces the fifth preset frequency and runs for a fifth preset time period;
if not, the compressor increases the sixth preset frequency or maintains the output frequency of the compressor, and operates for the sixth preset time period.
7. The method of claim 6, wherein if not, the compressor increases a sixth preset frequency or maintains an output frequency of the compressor and operates for a sixth preset period of time, specifically: judging whether the indoor heating rate is greater than zero;
if yes, maintaining the output frequency of the compressor, and running for a sixth preset time period;
If not, the compressor increases the sixth preset frequency and operates for a sixth preset period of time.
8. The method of claim 7, wherein the third predetermined frequency is less than the fifth predetermined frequency and the third predetermined time period is greater than the fifth predetermined time period;
The fourth preset frequency is greater than the sixth preset frequency, and the fourth preset time period is greater than the sixth preset time period.
9. An air conditioning unit frosting-free control system, comprising:
the acquisition module is used for acquiring a reference humidity value of the air conditioning unit in the current state;
The calculation module is used for calculating the dew point temperature according to the reference humidity value and the ambient temperature;
The adjusting module is used for adjusting the output frequency and the running time of the compressor according to the difference value between the temperature of the evaporator and the dew point temperature and the difference value between the indoor environment temperature and the temperature set by a user; the evaporator temperature is the saturation temperature of the refrigerant inlet of the fin heat exchanger; the method is particularly used for judging whether the indoor environment temperature is higher than the user set temperature or not if the difference between the evaporator temperature and the dew point temperature is higher than the preset temperature;
if yes, the compressor reduces the first preset frequency and operates for a first preset time period;
if not, the compressor increases a second preset frequency and operates for a second preset time period;
Further comprises:
if the difference between the evaporator temperature and the dew point temperature is smaller than or equal to the preset temperature and the evaporator temperature is larger than the dew point temperature, judging whether the indoor environment temperature is larger than the user set temperature;
if yes, the compressor reduces a third preset frequency and operates for a third preset time period;
if not, the compressor increases a fourth preset frequency and operates for a fourth preset time period;
The first preset frequency is smaller than the third preset frequency, and the first preset time period is longer than the third preset time period; the second preset frequency is greater than the fourth preset frequency, and the second preset time period is greater than the fourth preset time period.
10. An air conditioner, comprising:
Comprising the following steps: at least one processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-8.
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