CN113294884A - Heating control method and device and air conditioner - Google Patents
Heating control method and device and air conditioner Download PDFInfo
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- CN113294884A CN113294884A CN202110687827.4A CN202110687827A CN113294884A CN 113294884 A CN113294884 A CN 113294884A CN 202110687827 A CN202110687827 A CN 202110687827A CN 113294884 A CN113294884 A CN 113294884A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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Abstract
The invention provides a heating control method and device and an air conditioner, and relates to the technical field of air conditioners. The heating control method comprises the following steps: responding to a heating instruction to obtain a saturation temperature value at an outlet of the compressor; acquiring an outlet pipe temperature value of the indoor unit; calculating the heating supercooling degree according to the saturation temperature value and the outlet pipe temperature value; judging whether the heating supercooling degree is smaller than a first preset supercooling degree or not; and if the heating supercooling degree is less than the first preset supercooling degree, controlling the frequency of the compressor according to the outer ring temperature value, and controlling the opening of the electronic expansion valve according to the obtained running time of the air conditioner. Under the condition that the heating supercooling degree is smaller than the first preset supercooling degree, the frequency of the compressor is controlled through the outer ring temperature value, the opening degree of the electronic expansion valve is controlled according to the operation time, and the saturation temperature value is adjusted through synchronous control of the frequency of the compressor and the opening degree of the electronic expansion valve, so that the heating supercooling degree is improved, the flow speed of a refrigerant is reduced, and the comfort of a user is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a heating control method and device and an air conditioner.
Background
In the present air conditioner extensive daily life, the user no longer only has the requirement to function such as heating, refrigeration when using the air conditioner, and the travelling comfort also becomes a standard that the user pursues, and the travelling comfort that the user used is often influenced to the noise problem of air conditioner in the course of the work, especially the many online air conditioner, because the indoor set load is many, the connecting pipe length is various, refrigerant circulation is stable because of the manifold of scene, can appear the noise problem. Particularly, in the starting and starting stage, the opening degree of the electronic expansion valve is large, the discharge amount of the refrigerant is large, the high pressure and the supercooling degree are not fully established, the noise of the refrigerant flowing is easily large, and the comfort of a user is poor.
Disclosure of Invention
The invention solves the problem of how to reduce the noise of the refrigerant and improve the comfort of users.
In order to solve the above problems, the present invention provides a heating control method, a heating control device and an air conditioner.
In a first aspect, an embodiment of the present invention provides a heating control method applied to an air conditioner, where the heating control method includes:
responding to a heating instruction to obtain a saturation temperature value at an outlet of the compressor;
acquiring an outlet pipe temperature value of the indoor unit;
calculating heating supercooling degree according to the saturation temperature value and the outlet pipe temperature value;
judging whether the heating supercooling degree is smaller than a first preset supercooling degree or not;
and if the heating supercooling degree is smaller than the first preset supercooling degree, controlling the frequency of the compressor according to the outer ring temperature value, and controlling the opening of the electronic expansion valve according to the obtained running time of the air conditioner.
Under the condition that the heating supercooling degree is smaller than the first preset supercooling degree, the frequency of the compressor is controlled through the outer ring temperature value, the opening degree of the electronic expansion valve is controlled according to the operation time, and the saturation temperature value is adjusted through synchronous control of the frequency of the compressor and the opening degree of the electronic expansion valve, so that the heating supercooling degree is improved, the flow speed of a refrigerant is reduced, and the comfort of a user is improved.
In an alternative embodiment of the present invention, the step of controlling the frequency of the compressor according to the outer loop temperature value comprises:
judging whether the outer ring temperature value is less than or equal to a first preset temperature value or not;
and if the outer ring temperature value is less than or equal to the first preset temperature value, controlling the compressor to operate at a first preset frequency.
In an alternative embodiment of the present invention, the step of controlling the frequency of the compressor according to the outer loop temperature value further comprises:
if the outer ring temperature value is greater than the first preset temperature value, judging whether the outer ring temperature value is less than or equal to a second preset temperature value;
and if the outer ring temperature value is greater than the first preset temperature value and less than or equal to the second preset temperature value, controlling the compressor to operate at a second preset frequency, wherein the first preset frequency is greater than the second preset frequency.
In an alternative embodiment of the present invention, the step of controlling the frequency of the compressor according to the outer loop temperature value further comprises:
if the outer ring temperature value is greater than the second preset temperature value, judging whether the outer ring temperature value is less than or equal to a third preset temperature value;
and if the outer ring temperature value is greater than the second preset temperature value and less than or equal to a third preset temperature value, controlling the compressor to operate at a third preset frequency, wherein the second preset frequency is greater than the third preset frequency.
In an alternative embodiment of the present invention, the step of controlling the frequency of the compressor according to the outer loop temperature value further comprises:
and if the outer ring temperature value is greater than the third preset temperature value, controlling the compressor to operate at a fourth preset frequency, wherein the third preset frequency is greater than the fourth preset frequency.
In an optional embodiment of the present invention, the starting phase of the air conditioner includes a continuous starting time period and a plurality of setting time periods, and the step of controlling the opening degree of the electronic expansion valve according to the obtained operation time of the air conditioner includes:
and if the running time is within the starting time period, controlling the electronic expansion valve to run at a first opening degree.
In an optional embodiment of the present invention, the starting phase of the air conditioner includes a continuous starting time period and a plurality of setting time periods, and the step of controlling the opening degree of the electronic expansion valve according to the obtained operation time of the air conditioner includes:
if the running time is within a set time period, acquiring an outer ring temperature value and a refrigerant capacity value;
and controlling the electronic expansion valve to operate at a set opening degree according to the outer ring temperature value and the refrigerant volume value.
In an optional embodiment of the present invention, the step of controlling the opening set opening of the electronic expansion valve according to the outer ring temperature value and the refrigerant capacity value includes:
and in the same set time period, setting the second opening as the set opening under the conditions that the outer ring temperature value is greater than or equal to a fourth preset temperature value and the refrigerant volume value is greater than or equal to a preset volume value.
In an optional embodiment of the present invention, the step of adjusting the opening degree of the electronic expansion valve according to the outer ring temperature value and the refrigerant capacity value further includes:
and in the same set time period, setting a third opening degree as the set opening degree under the conditions that the outer ring temperature value is less than a fourth preset temperature value and the refrigerant volume value is greater than or equal to a preset volume value, wherein the third opening degree is less than the second opening degree.
In an optional embodiment of the present invention, the step of adjusting the opening degree of the electronic expansion valve according to the outer ring temperature value and the refrigerant capacity value further includes:
and in the same set time period, setting the fourth opening as the set opening under the conditions that the outer ring temperature value is greater than or equal to a fourth preset temperature value and the refrigerant volume value is less than a preset volume value.
In an optional embodiment of the present invention, the step of adjusting the opening degree of the electronic expansion valve according to the outer ring temperature value and the refrigerant capacity value further includes:
and in the same set time period, setting a fifth opening as the set opening under the conditions that the outer ring temperature value is smaller than a fourth preset temperature value and the refrigerant volume value is smaller than a preset volume value, wherein the fifth opening is smaller than the fourth opening.
In an alternative embodiment of the present invention, the step of controlling the opening degree of the electronic expansion valve according to the operation time further includes:
and if the heating supercooling degree is less than or equal to a second preset supercooling degree, the saturation temperature value is less than or equal to a fifth preset temperature value and the outlet pipe temperature value is greater than or equal to a sixth preset temperature value, controlling the electronic expansion valve to operate at a preset opening degree within the next set time period, wherein the preset opening degree is less than the set opening degree of the set time period.
In an alternative embodiment of the present invention, the controlling the electronic expansion valve to operate at the preset opening degree in the next set time period includes:
calculating a sixth opening according to the set opening; subtracting a fixed value from the set opening degree to obtain a sixth opening degree;
judging whether the sixth opening degree is greater than or equal to a seventh opening degree;
and if the sixth opening degree is greater than or equal to the seventh opening degree, setting the sixth opening degree as the preset opening degree.
In an optional embodiment of the present invention, the controlling, in a next set time period, the step of controlling the electronic expansion valve to operate at a preset opening degree further includes:
and if the sixth opening degree is smaller than the seventh opening degree, setting the seventh opening degree as the preset opening degree.
In a second aspect, an embodiment of the present invention provides a heating control device, which is applied to an air conditioner, and includes:
the response module is used for responding to the heating instruction to obtain a saturation temperature value at the outlet of the compressor;
the acquisition module is used for acquiring an outlet pipe temperature value of the indoor unit;
the calculation module is used for calculating the heating supercooling degree according to the saturation temperature value and the outlet pipe temperature value;
the judgment module is used for judging whether the heating supercooling degree is smaller than a first preset supercooling degree;
and the control module is used for controlling the frequency of the compressor according to the outer ring temperature value and controlling the opening of the electronic expansion valve according to the obtained running time of the air conditioner if the heating supercooling degree is smaller than the first preset supercooling degree.
The beneficial effects of the heating control apparatus provided by the second aspect are the same as those of the heating control method provided by the first aspect, and are not described herein again.
In a third aspect, an embodiment of the present invention provides an air conditioner, where the air conditioner includes a controller, and the controller is configured to execute a computer instruction to implement the heating control method provided in the first aspect.
The beneficial effects of the air conditioner provided by the third aspect are the same as those of the heating control method provided by the first aspect, and are not described herein again.
Drawings
Fig. 1 is a block diagram of an air conditioner according to an embodiment of the present invention.
Fig. 2 is a flowchart of a heating control method according to an embodiment of the present invention.
Fig. 3 is a flowchart illustrating sub-steps of step S500 of a heating control method according to an embodiment of the present invention.
Fig. 4 is a flowchart of sub-steps of step S600 of the heating control method according to the embodiment of the present invention.
Fig. 5 is a flowchart illustrating sub-steps of step S630 of the heating control method according to an embodiment of the present invention.
Fig. 6 is a flowchart of sub-steps of step S650 of the heating control method according to an embodiment of the present invention.
Fig. 7 is a block diagram of a heating control device according to an embodiment of the present invention.
Description of reference numerals:
10-an air conditioner; 11-a compressor; 12-an electronic expansion valve; 13-a controller; 20-heating control device; 21-a response module; 22-an acquisition module; 23-a calculation module; 24-a judgment module; 25-control module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Examples
Referring to fig. 1, a heating control method and apparatus provided in an embodiment of the present invention are applied to an air conditioner 10, and the heating control method and apparatus provided in this embodiment can improve a heating supercooling degree at a start-up stage of the air conditioner 10, and reduce noise of refrigerant flow, thereby improving user comfort.
In the current widespread daily life of the air conditioner 10, users no longer only have requirements on heating, refrigerating and other functions when using the air conditioner 10, and comfort also becomes a standard pursued by users, and the comfort of users is often affected by the noise problem of the air conditioner 10 in the working process, especially the multi-split air conditioner 10, because of the multiple indoor unit loads, the lengths of the connecting pipes are various, and the noise problem can occur due to the various scenes of the stable refrigerant circulation. Particularly, in the starting stage, the electronic expansion valve 12 has a large opening degree, a large amount of discharged refrigerant, and insufficient establishment of high pressure and supercooling degree, which easily causes large noise of refrigerant flow and poor comfort of users. The heating control method and the heating control device provided by the embodiment of the invention can improve the problems, improve the heating supercooling degree in the starting stage of the air conditioner 10, reduce the noise of refrigerant flowing and further improve the comfort of users.
Referring to fig. 2, the heating control method according to the embodiment of the present invention includes the following specific steps:
in step S100, a saturation temperature value at the outlet of the compressor 11 is acquired in response to the heating instruction.
In this embodiment, after receiving a heating instruction, the air conditioner 10 is controlled to start and operate a heating mode, and after the air conditioner 10 is started, a high-pressure value at an outlet of the compressor 11 is obtained, and then a saturation temperature value is obtained by converting the high-pressure value.
In general, the saturation temperature value corresponding to the high pressure value can be obtained by looking up a table, and the conversion process is well known.
And step S200, obtaining an outlet pipe temperature value of the indoor unit.
In this embodiment, the outlet pipe temperature value refers to a temperature value of the refrigerant at the outlet of the indoor heat exchanger, and may be detected by a temperature sensor disposed at the outlet of the indoor heat exchanger.
And step S300, calculating the heating supercooling degree according to the saturation temperature value and the outlet pipe temperature value.
In this embodiment, the outlet pipe temperature value is subtracted from the saturation temperature value to obtain the heating supercooling degree. The heat exchange quantity of the current refrigerant or the heat exchange capacity of the refrigerant can be judged through the heating supercooling degree. If the heating supercooling degree is small, the difference value between the saturation temperature value and the outlet pipe temperature value is small, and the refrigerant heat exchange is possibly insufficient. It is also possible that the saturation temperature value itself is relatively small and the heat exchange amount of the refrigerant itself is limited. If the heating supercooling degree is larger, the difference value between the saturation temperature value and the outlet pipe temperature value is relatively larger, the refrigerant is explained to perform sufficient heat exchange, or the current saturation temperature value is relatively larger, and the refrigerating capacity of the refrigerant is relatively better. The heat exchange condition of the current refrigerant can be judged by calculating the heating supercooling degree.
And step S400, judging whether the heating supercooling degree is less than a first preset supercooling degree.
In this embodiment, if the heating supercooling degree is small, the difference between the saturation temperature value and the outlet pipe temperature value is small, and it may be that the heat exchange of the refrigerant is insufficient. It is also possible that the saturation temperature value itself is relatively small and the heat exchange amount of the refrigerant itself is limited. In the starting-up stage, if the heating supercooling degree is relatively small, in order to quickly enable the indoor environment temperature value to reach the set temperature value, the problem of high noise easily occurs when the flow rate of the refrigerant is too fast through the flow rate of the refrigerant which can be fast.
In this embodiment, the first predetermined supercooling degree ranges from 6 to 10, and is preferably 8.
Step S500, if the heating supercooling degree is less than the first preset supercooling degree, controlling the frequency of the compressor 11 according to the outer ring temperature value.
In this embodiment, if the heating supercooling degree is smaller than the first preset supercooling degree, it indicates that the current saturation temperature value is relatively low, and the heat exchange amount of the refrigerant itself is relatively small, and then the saturation temperature value needs to be further increased, the frequency of the compressor 11 is controlled by the outer ring temperature value, the opening of the electronic expansion valve 12 is controlled according to the operation time, and the saturation temperature value is adjusted by synchronously controlling the frequency of the compressor 11 and the opening of the electronic expansion valve 12, so that the heating supercooling degree is increased, the flow rate of the refrigerant is reduced, and the comfort of the user is improved.
Referring to fig. 3, step S500 may include step S510, step S520, step S530, step S540, step S550, step S560 and step S570.
Step S510, determine whether the outer ring temperature value is less than or equal to a first preset temperature value.
In this embodiment, the first preset temperature value is substantially 0 ℃, if the outer ring temperature value is less than or equal to the first preset temperature value, the forward outer ring temperature value may be considered to be relatively low, and if the outer ring temperature value is greater than the first preset temperature value, the next determination is required.
In step S520, if the outer ring temperature is less than or equal to the first preset temperature, the compressor 11 is controlled to operate at the first preset frequency.
In this embodiment, if the outer ring temperature value is less than or equal to the first preset temperature value, it indicates that the current outer ring temperature value is very low, and the compressor 11 needs to operate at a relatively high frequency in order to increase the saturation temperature value by increasing the heat exchange amount of the refrigerant. The first predetermined frequency is equal to the minimum frequency plus a first adjustment value, the minimum frequency generally ranges from 25 to 35, and preferably the minimum frequency is generally 30. In order to make the first preset frequency larger, the range of the first adjustment value is relatively larger, approximately between 13 and 17, and preferably the first adjustment value is 15. That is, the first preset frequency ranges between 38 and 52, preferably 45.
When the outer ring temperature value is less than or equal to the first preset temperature value, the current outer ring temperature value is extremely small, the compressor 11 needs to operate at a high frequency, a high-pressure value is quickly established, and the saturation temperature value is increased.
Step S530, if the outer ring temperature value is greater than the first preset temperature value, determining whether the outer ring temperature value is less than or equal to a second preset temperature value.
If the outer ring temperature value is greater than the first preset temperature value, the outer ring temperature value needs to be further judged in order to accurately control the saturation temperature value, and whether the outer ring temperature value is less than or equal to the second preset temperature value needs to be further judged.
Preferably, the second preset temperature value is 10 ℃.
In step S540, if the outer ring temperature is greater than the first preset temperature and less than or equal to the second preset temperature, the compressor 11 is controlled to operate at a second preset frequency, wherein the first preset frequency is greater than the second preset frequency.
In this embodiment, if the outer ring temperature value is greater than the first preset temperature value and less than or equal to the second preset temperature value, it can be considered that the current outer ring temperature value is relatively small, and the compressor 11 can operate at a relatively large frequency. In the same way as the first preset frequency is calculated, the second preset frequency is equal to the minimum frequency plus a second adjustment value, generally, the value range of the minimum frequency is between 25 and 35, and preferably, the value range of the minimum frequency is generally 30. In order to make the second preset frequency larger, the range of the second adjustment value is also relatively larger, approximately between 8 and 12, and preferably the first adjustment value is 10. That is, the first preset frequency ranges between 33 and 37, preferably 40.
When the outer ring temperature value is greater than the first preset temperature value and less than or equal to the second preset temperature value, the current outer ring temperature value is relatively small, the compressor 11 needs to operate at a relatively large frequency, a high-pressure value is quickly established, and the saturation temperature value is increased.
In step S550, if the outer ring temperature value is greater than the second preset temperature value, it is determined whether the outer ring temperature value is less than or equal to a third preset temperature value.
If the outer ring temperature value is greater than the second preset temperature value, the current outer ring temperature value is considered to be relatively high, in order to accurately control the saturation temperature value, the outer ring temperature value needs to be further judged, and whether the outer ring temperature value is less than or equal to a third preset temperature value needs to be further judged.
Preferably, the third preset temperature value is 20 ℃.
In step S560, if the outer ring temperature is greater than the second predetermined temperature and less than or equal to the third predetermined temperature, the compressor 11 is controlled to operate at a third predetermined frequency, wherein the second predetermined frequency is greater than the third predetermined frequency.
In this embodiment, if the outer ring temperature value is greater than the second preset temperature value and less than or equal to the third preset temperature value, it may be considered that the current outer ring temperature value is relatively large, and the temperature difference between the outer ring temperature value and the set temperature value of the indoor environment is relatively small, so as to reduce the waste of the refrigerant cooling capacity, the compressor 11 may operate at a relatively small frequency.
In the same way as the first preset frequency is calculated, the third preset frequency is equal to the minimum frequency plus a third adjustment value, generally, the value range of the minimum frequency is between 25 and 35, and preferably, the value range of the minimum frequency is generally 30. In order to make the third preset frequency smaller, the range of the third adjustment value is relatively small, approximately between 3 and 7, and preferably the first adjustment value is 5. That is, the first preset frequency ranges between 28 and 42, preferably 35.
In step S570, if the outer ring temperature is greater than a third preset temperature, the compressor 11 is controlled to operate at a fourth preset frequency, where the third preset frequency is greater than the fourth preset frequency.
In this embodiment, if the outer ring temperature value is greater than the third preset temperature value, it may be considered that the current outer ring temperature value is higher, and the temperature difference between the set temperature value and the outer ring temperature value is relatively smaller, so as to reduce the waste of the refrigerant cooling capacity, the compressor 11 may operate at a relatively smaller frequency.
In the same way as the first preset frequency is calculated, the fourth preset frequency is equal to the minimum frequency plus a fourth adjustment value, generally, the value range of the minimum frequency is between 25 and 35, and preferably, the value range of the minimum frequency is generally 30. In order to make the fourth preset frequency small, the fourth adjustment value is 0. That is, the first preset frequency ranges between 25 and 35, preferably 30.
In the present embodiment, the frequency of the compressor 11 is adjusted by the outer ring temperature value in steps S510 to S570, so that the saturation temperature value is increased while the waste of energy is reduced.
Referring to fig. 2, in step S600, if the heating supercooling degree is less than the first preset supercooling degree, the opening degree of the electronic expansion valve 12 is controlled according to the obtained operation time of the air conditioner 10.
In this embodiment, if the heating supercooling degree is smaller than the first preset supercooling degree, it indicates that the current saturation temperature value is relatively low, and the heat exchange amount of the refrigerant itself is relatively small, and then the saturation temperature value needs to be further increased, the frequency of the compressor 11 is controlled by the outer ring temperature value, the opening of the electronic expansion valve 12 is controlled according to the operation time, and the saturation temperature value is adjusted by synchronously controlling the frequency of the compressor 11 and the opening of the electronic expansion valve 12, so that the heating supercooling degree is increased, the flow rate of the refrigerant is reduced, and the comfort of the user is improved.
Referring to fig. 4, step S600 may include step S610, step S620, step S630, step S640, and step S650.
In the present embodiment, in order to improve the control accuracy of the electronic expansion valve 12 in the start-up phase of the air conditioner 10, the start-up phase is divided into a plurality of time periods, i.e., one start-up time period and a plurality of set time periods, and the start-up time period is immediately after start-up. Generally, the starting stage is divided into 4 segments, the first segment is a starting time segment, and the other three segments are all set time segments. That is, the start-up phase includes one start-up period and 3 set periods.
In this embodiment, the starting time period generally ranges from 60s to 90s, and preferably ranges from 30 s. Similarly, the first set time period has a value in the range of 15s to 45s, preferably 30 s. The second set time period has a value in the range of 60s to 120s, preferably 90 s. The value range of the third set time period is 60 s-120 s, preferably 90 s.
In step S610, if the operation time is within the start-up period, the electronic expansion valve 12 is controlled to operate at the first opening degree.
In the starting time period, the air conditioner 10 is just started at this time, the heating supercooling degree of the air conditioner 10 is not established, the saturation temperature value is relatively low at this time, the heat exchange amount of the refrigerant is relatively small, and the electronic expansion valve 12 is controlled to open the first smaller opening degree at this time, so that the flow velocity of the refrigerant is reduced, and the noise of the refrigerant is reduced.
Generally, the range of the first opening is approximately 15 to 25. Preferably, the first opening degree is 20.
In step S620, if the operation time is within the set time period, the outer ring temperature value and the refrigerant capacity value are obtained.
The outer ring temperature value refers to a temperature value of an outdoor environment, and the refrigerant capacity value refers to a capacity of a refrigerant in the indoor unit. After the air conditioner 10 operates within the set time period, in order to enable the indoor ambient temperature to quickly reach the set temperature value, the opening degree of the electronic expansion valve 12 may be further adjusted according to the outer ring temperature value and the refrigerant volume value.
In step S630, the electronic expansion valve 12 is controlled to operate at a set opening degree according to the outer ring temperature value and the refrigerant volume value.
In this embodiment, after the air conditioner 10 is started, the operation of the air conditioner 10 is started, and in order to enable the indoor environment temperature to quickly reach the set temperature value, the opening degree of the electronic expansion valve 12 may be further adjusted according to the outer ring temperature value and the refrigerant volume value.
In this embodiment, the opening degree of the electronic expansion valve 12 should be larger as the outer ring temperature value is larger, under the same other conditions. Similarly, the larger the refrigerant capacity value is, the larger the opening degree of the electronic expansion valve 12 should be set in order to prevent the high pressure from being excessively high due to accumulation of the refrigerant in the indoor unit under the same other conditions.
Referring to fig. 5, step S630 may include step S632, step S634, step S636 and step S638.
In the present embodiment, the electronic expansion valve 12 is controlled in the same manner for three set periods.
In step S632, in the same setting time period, the second opening degree is set as the setting opening degree under the condition that the outer ring temperature value is greater than or equal to the fourth preset temperature value and the refrigerant volume value is greater than or equal to the preset volume value.
If the outdoor unit temperature value is greater than or equal to the fourth preset temperature value and the refrigerant capacity value is greater than or equal to the preset capacity value, it indicates that both the outer ring temperature value and the refrigerant capacity value are large, and the opening degree of the electronic expansion valve 12 in this case should be the largest, and the second large opening degree is taken as the set opening degree.
In general, in the second stage, i.e. the first setting time period, the value range of the second opening degree is 100 to 160, preferably 130. In the third stage, the second opening degree of the second setting time period is added with the first setting value on the basis of the second opening degree in the first setting time period, and the range of the first setting value is 5-30, preferably 15. That is, the range of the second opening degree in the third stage and the second set time period is 105 to 190, preferably 145. In the fourth stage, the second opening degree of the third setting period is added with the first setting value on the basis of the second opening degree in the second setting period, and the range of the first setting value is 5-30, preferably 15. That is, the range of the second opening degree in the fourth stage and the third setting time period is 110 to 220, preferably 160.
In step S634, in the same setting time period, the third opening degree is set to the setting opening degree under the condition that the outer ring temperature value is smaller than the fourth preset temperature value and the refrigerant volume value is greater than or equal to the preset volume value, and the third opening degree is smaller than the second opening degree.
In this embodiment, under the condition that the outer loop temperature value is smaller than the fourth preset temperature value and the refrigerant volume is greater than or equal to the preset volume value, the electronic expansion valve 12 should be relatively small, the third opening degree should be smaller than the second opening degree, and the third opening degree is obtained by subtracting the second set value from the second opening degree. The value range of the second set value is 10-30, and preferably 20.
The value range of the third opening degree is as follows:
in the second stage, that is, in the first set time period, the value range of the third opening degree is 90-130, preferably 110. In the third stage, i.e. in the second set time period, the value range of the third opening degree is 95-160, preferably 125. In the fourth stage, that is, in the third set time period, the value range of the third opening degree is 100 to 190, preferably 140.
Step 636, in the same set time period, under the condition that the outer ring temperature value is greater than or equal to the fourth preset temperature value and the refrigerant volume value is less than the preset volume value, setting the fourth opening as the set opening.
Similarly, under the condition that the outer ring temperature value is greater than or equal to the fourth preset temperature value and the refrigerant volume value is smaller than the preset volume value, the fourth opening degree is smaller than the second opening degree due to the smaller refrigerant volume value. The specific situation is as follows:
in general, in the second stage, that is, in the first setting time period, the value range of the fourth opening degree is 60 to 120, preferably 90. In the third stage, the second opening degree of the second setting time period is added with a third setting value on the basis of the second opening degree in the first setting time period, and the range of the third setting value is 5-30, preferably 15. That is, the range of the fourth opening degree in the third stage and the second setting time period is 65 to 150, preferably 105. In the fourth stage, the fourth opening degree of the third setting period is added with the third setting value on the basis of the second opening degree in the second setting period, and the range of the first setting value is 5-30, preferably 15. That is, the value range of the fourth opening degree in the fourth stage and the third set time period is 70 to 180, preferably 120.
Step S638, in the same setting time period, under the condition that the outer ring temperature value is less than the fourth preset temperature value and the refrigerant volume value is less than the preset volume value, setting the fifth opening degree as the setting opening degree, where the fifth opening degree is less than the fourth opening degree.
In this embodiment, under the condition that the outer loop temperature value is smaller than the fourth preset temperature value and the refrigerant volume is smaller than the preset volume value, the electronic expansion valve 12 should be relatively minimum, and the fifth opening is the smallest opening obtained by subtracting the fourth set value from the fourth opening. The value range of the fourth set value is 5-15, preferably 10.
The value range of the third opening degree is as follows:
in the second stage, namely the first set time period, the value range of the fifth opening degree is 55-105, preferably 80. In the third stage, that is, in the second set time period, the value range of the fifth opening degree is 60 to 145, preferably 115. In the fourth stage, that is, in the third setting time period, the value range of the fifth opening degree is 65 to 165, preferably 130.
Referring to fig. 4, in step S640, it is determined whether the heating supercooling degree is less than or equal to the second preset supercooling degree, the saturation temperature value is less than or equal to the fifth preset temperature value, and the outlet pipe temperature value is greater than or equal to the sixth preset temperature value.
In the present embodiment, in the process of executing step S610, step S620 and step S630, step S640 and step S650 are executed simultaneously. While the opening degree of the electronic expansion valve 12 is adjusted by the outer ring temperature value and the refrigerant volume value, in order to avoid that the opening degree of the electronic expansion valve 12 is too small, and the indoor environment temperature value cannot be rapidly increased, the above steps are executed, and meanwhile, bottom-keeping determination is required to ensure that the opening degree of the electronic expansion valve 12 cannot be smaller than a seventh opening degree.
Step S650, if the heating supercooling degree is less than or equal to the second preset supercooling degree, the saturation temperature value is less than or equal to the fifth preset temperature value, and the outlet pipe temperature value is greater than or equal to the sixth preset temperature value, controlling the electronic expansion valve 12 to operate at the preset opening degree within the next set time period, wherein the preset opening degree is less than the set opening degree of the set time period.
In the present embodiment, if the above conditions are satisfied at the same time, it is described that the current saturation temperature value is relatively low, and the opening degree of the electronic expansion valve 12 needs to be further reduced in addition to the control by the outer ring temperature value and the refrigerant capacity value, so that the electronic expansion valve 12 is operated at a preset opening degree smaller than the set opening degree.
The value range of the second preset supercooling degree is 3-5, and the preferable value range is 4. The value range of the fifth preset temperature value is 27-37, and preferably 32. The value range of the low-pressure value corresponding to the sixth preset temperature value is 0.2-0.4, and preferably 0.3.
Referring to fig. 6, step S650 may include step S652, step S654, step S656 and step S658.
Step S652, calculating a sixth opening degree according to the set opening degree; wherein, the sixth opening degree is obtained by subtracting a fixed value from the set opening degree.
In the embodiment, when the sixth opening degree is calculated, the set opening degree is adopted to reduce by a fixed value, and the value range of the fixed value is 0-20, preferably 10.
In step S654, it is determined whether the sixth opening degree is greater than or equal to the seventh opening degree.
The seventh opening degree is typically 20. The seventh opening degree is the minimum opening degree at which the refrigerant can flow, and the opening degree of the electronic expansion valve 12 can be determined by determining the relationship between the sixth opening degree and the seventh opening degree when the condition in step S650 is satisfied.
In step S656, if the sixth opening degree is greater than or equal to the seventh opening degree, the sixth opening degree is set to a preset opening degree.
In this embodiment, if the sixth opening degree is greater than or equal to the seventh opening degree, it is described that the calculated sixth opening degree is relatively large, and the sixth opening degree may be used as the preset opening degree.
In step S658, if the sixth opening degree is smaller than the seventh opening degree, the seventh opening degree is set to the preset opening degree.
If the sixth opening is smaller than the seventh opening, the calculated sixth opening is relatively small, and if the sixth opening is used as the preset opening, the normal flow of the refrigerant cannot be ensured, so the seventh opening is used as the set opening.
In summary, in the heating control method provided in this embodiment, when the heating supercooling degree is smaller than the first preset supercooling degree, the frequency of the compressor 11 is controlled by the outer ring temperature value and the opening of the electronic expansion valve 12 is controlled according to the operation time, and the saturation temperature value is adjusted by synchronously controlling the frequency of the compressor 11 and the opening of the electronic expansion valve 12, so as to improve the heating supercooling degree, reduce the flow rate of the refrigerant, and improve the comfort of the user.
Referring to fig. 7, an embodiment of the present invention further provides a heating control device 20, which is applied to the air conditioner 10, and the heating control device 20 includes:
and the response module 21 is used for responding to the heating instruction to acquire a saturation temperature value at the outlet of the compressor 11.
Step S100 of the heating control method provided by the embodiment of the present invention may be executed by the response module 21.
And the obtaining module 22 is used for obtaining an outlet pipe temperature value of the indoor unit.
Step S200 of the heating control method provided by the embodiment of the present invention may be executed by the obtaining module 22.
And the calculating module 23 is configured to calculate the heating supercooling degree according to the saturation temperature value and the outlet pipe temperature value.
Step S300 of the heating control method provided by the embodiment of the present invention may be executed by the calculating module 23.
And the judging module 24 is used for judging whether the heating supercooling degree is smaller than a first preset supercooling degree.
Step S400 of the heating control method provided by the embodiment of the present invention may be executed by the determining module 24.
And the control module 25 is configured to control the frequency of the compressor 11 according to the outer ring temperature value if the heating supercooling degree is less than the first preset supercooling degree, and control the opening of the electronic expansion valve 12 according to the obtained operation time of the air conditioner 10.
Step S500 and its substeps, and step S600 and its substeps of the heating control method provided by the embodiment of the present invention may be executed by the control module 25.
In the embodiment of the present invention, the air conditioner 10 includes a controller 13, and the controller 13 may be an integrated circuit chip having signal processing capability. The controller 13 may be a general-purpose processor, and may include a Central Processing Unit (CPU), a single chip Microcomputer (MCU), a Micro Controller Unit (MCU), a Complex Programmable Logic Device (CPLD), a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), an embedded ARM, and other chips, where the controller 13 may implement or execute the methods, steps, and Logic blocks disclosed in the embodiments of the present invention.
In one possible implementation, the air conditioner 10 may further include a memory for storing program instructions executable by the controller 13, for example, the heating control device 20 provided in the embodiment of the present application may include at least one of software and firmware stored in the memory. The Memory may be a stand-alone external Memory including, but not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Read-Only Memory (EPROM), electrically Erasable Read-Only Memory (EEPROM). The memory may also be integrated with the controller 13, for example the memory may be integrated with the controller 13 in the same chip.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (16)
1. A heating control method applied to an air conditioner (10), characterized by comprising:
responding to a heating instruction to acquire a saturation temperature value at an outlet of the compressor (11);
acquiring an outlet pipe temperature value of the indoor unit;
calculating heating supercooling degree according to the saturation temperature value and the outlet pipe temperature value;
judging whether the heating supercooling degree is smaller than a first preset supercooling degree or not;
and if the heating supercooling degree is smaller than the first preset supercooling degree, controlling the frequency of the compressor (11) according to the outer ring temperature value, and controlling the opening of the electronic expansion valve (12) according to the acquired running time of the air conditioner (10).
2. Heating control method according to claim 1, wherein the step of controlling the frequency of the compressor (11) in dependence on the outer loop temperature value comprises:
judging whether the outer ring temperature value is less than or equal to a first preset temperature value or not;
and if the outer ring temperature value is less than or equal to the first preset temperature value, controlling the compressor (11) to operate at a first preset frequency.
3. Heating control method according to claim 2, wherein the step of controlling the frequency of the compressor (11) in dependence on the outer loop temperature value further comprises:
if the outer ring temperature value is greater than the first preset temperature value, judging whether the outer ring temperature value is less than or equal to a second preset temperature value;
and if the outer ring temperature value is greater than the first preset temperature value and less than or equal to the second preset temperature value, controlling the compressor (11) to operate at a second preset frequency, wherein the first preset frequency is greater than the second preset frequency.
4. Heating control method according to claim 3, wherein the step of controlling the frequency of the compressor (11) in dependence on the outer loop temperature value further comprises:
if the outer ring temperature value is greater than the second preset temperature value, judging whether the outer ring temperature value is less than or equal to a third preset temperature value;
and if the outer ring temperature value is greater than the second preset temperature value and less than or equal to the third preset temperature value, controlling the compressor (11) to operate at a third preset frequency, wherein the second preset frequency is greater than the third preset frequency.
5. Heating control method according to claim 4, wherein the step of controlling the frequency of the compressor (11) in dependence on the outer loop temperature value further comprises:
and if the outer ring temperature value is greater than the third preset temperature value, controlling the compressor (11) to operate at a fourth preset frequency, wherein the third preset frequency is greater than the fourth preset frequency.
6. The heating control method according to claim 1, wherein the start-up phase of the air conditioner (10) includes a continuous start-up period and a plurality of set periods, and the step of controlling the opening degree of the electronic expansion valve (12) according to the acquired running time of the air conditioner (10) includes:
and if the running time is within the starting time period, controlling the electronic expansion valve (12) to run at a first opening degree.
7. The heating control method according to claim 1, wherein the start-up phase of the air conditioner (10) includes a continuous start-up period and a plurality of set periods, and the step of controlling the opening degree of the electronic expansion valve (12) according to the acquired running time of the air conditioner (10) includes:
if the running time is within a set time period, acquiring an outer ring temperature value and a refrigerant capacity value;
and controlling the electronic expansion valve (12) to operate at a set opening degree according to the outer ring temperature value and the refrigerant volume value.
8. The heating control method according to claim 7, wherein the step of controlling the opening set opening degree of the electronic expansion valve (12) according to the outer ring temperature value and the refrigerant capacity value comprises:
and in the same set time period, setting the second opening as the set opening under the conditions that the outer ring temperature value is greater than or equal to a fourth preset temperature value and the refrigerant volume value is greater than or equal to a preset volume value.
9. The heating control method according to claim 7, wherein the step of adjusting the opening degree of the electronic expansion valve (12) according to the outer ring temperature value and the refrigerant capacity value further comprises:
and in the same set time period, setting a third opening degree as the set opening degree under the conditions that the outer ring temperature value is less than a fourth preset temperature value and the refrigerant volume value is greater than or equal to a preset volume value, wherein the third opening degree is less than the second opening degree.
10. The heating control method according to claim 7, wherein the step of adjusting the opening degree of the electronic expansion valve (12) according to the outer ring temperature value and the refrigerant capacity value further comprises:
and in the same set time period, setting the fourth opening as the set opening under the conditions that the outer ring temperature value is greater than or equal to a fourth preset temperature value and the refrigerant volume value is less than a preset volume value.
11. The heating control method according to claim 7, wherein the step of adjusting the opening degree of the electronic expansion valve (12) according to the outer ring temperature value and the refrigerant capacity value further comprises:
and in the same set time period, setting a fifth opening as the set opening under the conditions that the outer ring temperature value is smaller than a fourth preset temperature value and the refrigerant volume value is smaller than a preset volume value, wherein the fifth opening is smaller than the fourth opening.
12. Heating control method according to any one of claims 6-11, wherein the step of controlling the opening degree of the electronic expansion valve (12) in dependence on the operating time further comprises:
and if the heating supercooling degree is less than or equal to a second preset supercooling degree, the saturation temperature value is less than or equal to a fifth preset temperature value and the outlet pipe temperature value is greater than or equal to a sixth preset temperature value, controlling the electronic expansion valve (12) to operate at a preset opening degree within the next set time period, wherein the preset opening degree is less than the set opening degree of the set time period.
13. The heating control method according to claim 12, wherein the step of controlling the electronic expansion valve (12) to operate at a preset opening degree during a next set period of time includes:
calculating a sixth opening according to the set opening; subtracting a fixed value from the set opening degree to obtain a sixth opening degree;
judging whether the sixth opening degree is greater than or equal to a seventh opening degree;
and if the sixth opening degree is greater than or equal to the seventh opening degree, setting the sixth opening degree as the preset opening degree.
14. The heating control method according to claim 13, wherein the step of controlling the electronic expansion valve (12) to operate at a preset opening degree during a next set period of time further comprises:
and if the sixth opening degree is smaller than the seventh opening degree, setting the seventh opening degree as the preset opening degree.
15. A heating control apparatus applied to an air conditioner (10), wherein the heating control apparatus (20) includes:
the response module (21) is used for responding to the heating instruction to acquire a saturation temperature value at the outlet of the compressor (11);
the acquisition module (22) is used for acquiring an outlet pipe temperature value of the indoor unit;
the calculation module (23) is used for calculating the heating supercooling degree according to the saturation temperature value and the outlet pipe temperature value;
the judgment module (24) is used for judging whether the heating supercooling degree is smaller than a first preset supercooling degree;
and the control module (25) is used for controlling the frequency of the compressor (11) according to the outer ring temperature value and controlling the opening degree of the electronic expansion valve (12) according to the acquired running time of the air conditioner (10) if the heating supercooling degree is smaller than the first preset supercooling degree.
16. An air conditioner, characterized by comprising a controller (13), the controller (13) being configured to execute computer instructions to implement the heating control method according to any one of claims 1-14.
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Effective date of registration: 20221010 Address after: 315191 No. 1166 Mingguang North Road, Jiangshan Town, Ningbo, Zhejiang, Yinzhou District Patentee after: NINGBO AUX ELECTRIC Co.,Ltd. Patentee after: AUX AIR CONDITIONING LIMITED BY SHARE Ltd. Address before: 315000 No.1166 Mingguang North Road, Jiangshan Town, Yinzhou District, Ningbo City, Zhejiang Province Patentee before: NINGBO AUX ELECTRIC Co.,Ltd. Patentee before: Ningbo Oxfam intelligent commercial air conditioning manufacturing Co.,Ltd. |
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