CN114294785A - Control method of air conditioner, air conditioner and computer readable storage medium - Google Patents
Control method of air conditioner, air conditioner and computer readable storage medium Download PDFInfo
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- CN114294785A CN114294785A CN202111646927.9A CN202111646927A CN114294785A CN 114294785 A CN114294785 A CN 114294785A CN 202111646927 A CN202111646927 A CN 202111646927A CN 114294785 A CN114294785 A CN 114294785A
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Abstract
The invention discloses a control method of an air conditioner, the air conditioner and a computer readable storage medium, wherein the air conditioner comprises a compressor, an outdoor heat exchanger, a throttling component, an indoor heat exchanger and a dehumidifying pipe section, one end of the dehumidifying pipe section is communicated with an exhaust port of the compressor, the other end of the dehumidifying pipe section is connected between the throttling component and the indoor heat exchanger, an adsorbing material is arranged on the outer surface of the dehumidifying pipe section, the adsorbing material is arranged on the air inlet side of the outdoor heat exchanger, and a first electromagnetic valve is arranged on the dehumidifying pipe section, the method comprises the following steps: when the condition that the defrosting condition is met is detected, controlling the air conditioner to defrost, and detecting a first current humidity value of the adsorbing material; and when the first current humidity value is greater than or equal to a humidity threshold value, opening the first electromagnetic valve. The invention aims to improve the heating effect when the air conditioner is in defrosting operation.
Description
Technical Field
The present invention relates to the field of air conditioners, and in particular, to a method for controlling an air conditioner, and a computer-readable storage medium.
Background
In the process of defrosting an outdoor heat exchanger of an air conditioner, if the outdoor heat exchanger is overcooled, the outdoor heat exchanger is frosted. In order to defrost, the outdoor heat exchanger may be maintained to operate in a condition where frost is not formed. However, if the outdoor heat exchanger is directly maintained in a working condition without frost formation, the heat exchange amount of the outdoor heat exchanger may be low, and the heating effect of the air conditioner may be poor.
Disclosure of Invention
The invention mainly aims to provide a control method of an air conditioner, the air conditioner and a computer readable storage medium, and aims to solve the technical problem that the heating effect of the air conditioner is poor due to the fact that the air conditioner is directly maintained in a working condition where frosting does not occur.
In order to achieve the above object, the present invention provides a method for controlling an air conditioner, the air conditioner including a compressor, an outdoor unit heat exchanger, a throttling component, an indoor heat exchanger, and a dehumidification pipe section, one end of the dehumidification pipe section being communicated with an exhaust port of the compressor, the other end of the dehumidification pipe section being connected between the throttling component and the indoor heat exchanger, an adsorption material being disposed on an outer surface of the dehumidification pipe section, the adsorption material being disposed on an air intake side of the outdoor unit heat exchanger, the dehumidification pipe section being provided with a first electromagnetic valve, the method including:
when the condition that the defrosting condition is met is detected, controlling the air conditioner to defrost, and detecting a first current humidity value of the adsorbing material;
and when the first current humidity value is greater than or equal to a humidity threshold value, opening the first electromagnetic valve.
Optionally, after the step of detecting the first current humidity value of the adsorbent material, the method further comprises:
opening the first solenoid valve when the first current humidity value is greater than or equal to the humidity threshold value, and,
reducing the operating frequency of the compressor, and obtaining a first dew point temperature and a first saturation temperature of the environment where the outdoor unit heat exchanger is located after reducing the operating frequency;
and when the first dew point temperature is lower than the first saturation temperature, returning to the step of reducing the operating frequency of the compressor.
Optionally, after the step of obtaining the first dew point temperature and the first saturation temperature of the environment where the outdoor heat exchanger is located, the method further includes:
when the first dew point temperature is greater than or equal to the first saturation temperature and the first saturation temperature is greater than a target temperature, detecting a second current humidity value of the adsorbing material, wherein the target temperature is obtained according to the first dew point temperature and is lower than the first dew point temperature;
and when the second current humidity value is larger than the humidity threshold value, returning to the step of reducing the running frequency of the compressor.
Optionally, after the step of detecting the second current humidity value of the adsorption material, the method further includes:
and when the second current humidity value is smaller than or equal to the humidity threshold value, closing the first electromagnetic valve.
Optionally, before the step of controlling the air conditioner to defrost when it is detected that the air conditioner satisfies the defrosting condition, the method further includes:
detecting a second saturation temperature of the environment where the outdoor unit heat exchanger is located;
and when the second saturation temperature is within a preset frosting temperature range, determining that the defrosting condition is met.
Optionally, the step of controlling the air conditioner to defrost includes:
when the second saturation temperature is within the preset frosting temperature range and is lower than 0 ℃, reducing the running frequency of the compressor according to a first preset step length;
and controlling the compressor to operate according to the reduced operating frequency, and returning to the step of detecting the second saturation temperature of the environment where the heat exchanger of the outdoor unit is located.
Optionally, the step of controlling the air conditioner to defrost and detecting the first current humidity value of the adsorption material includes:
controlling the air conditioner to defrost, and detecting a third saturation temperature of the environment where the outdoor unit heat exchanger is located again;
and when the third saturation temperature is not within the preset frosting temperature range, controlling the compressor to operate according to the current operation frequency, and detecting the first current humidity value of the adsorption material.
In addition, to achieve the above object, the present invention further provides an air conditioner, which includes a memory, a processor, and a control program of the air conditioner stored in the memory and operable on the processor, wherein the control program of the air conditioner, when executed by the processor, implements the steps of the control method of the air conditioner according to any one of the above aspects.
Optionally, the air conditioner further comprises a compressor, an outdoor unit heat exchanger, a throttling component, an indoor heat exchanger and a dehumidification pipe section, one end of the dehumidification pipe section is communicated with an exhaust port of the compressor, the other end of the dehumidification pipe section is connected between the throttling component and the indoor heat exchanger, an adsorption material is arranged on the outer surface of the dehumidification pipe section, the adsorption material is arranged on the air inlet side of the outdoor unit heat exchanger, and a first electromagnetic valve is arranged on the dehumidification pipe section.
Further, to achieve the above object, the present invention is also a computer-readable storage medium having stored thereon a control program of an air conditioner, the control program of the air conditioner realizing the steps of the control method of the air conditioner according to any one of the above when executed by a processor.
The embodiment of the invention provides a control method of an air conditioner, the air conditioner and a computer readable storage medium. Based on the structure of the air conditioner, when the condition that the defrosting condition is met is detected, the air conditioner is controlled to defrost, and a first current humidity value of the adsorption material is detected; and when the first current humidity value is greater than or equal to the humidity threshold value, opening the first electromagnetic valve. Therefore, under the defrosting working condition of the air conditioner, the moisture in the air can be adsorbed by the adsorbing material, so that the air is dried, and the heat exchange temperature difference between the heat exchanger of the outdoor unit and the temperature is improved. When the humidity of the adsorption material is too high, the adsorption material is heated by high-temperature gas in the compressor to be regenerated, so that water in the adsorption material is released, and the adsorption material can adsorb water in the air after being dried, so that the humidity of the air is reduced. Under the condition that the air humidity is lower, the temperature is higher, so that the heat exchange temperature difference between the outdoor unit heat exchanger and the air can be increased, the heat exchange quantity is increased, and the heating effect is improved. Therefore, the invention can control the air conditioner to defrost and improve the heating effect, thereby improving the thermal comfort of users in the space where the air conditioner acts.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of one embodiment of an air conditioner to which the present invention relates;
FIG. 3 is a schematic view of another embodiment of an air conditioner to which the present invention relates;
FIG. 4 is a schematic diagram of an embodiment of a control method of an air conditioner according to the present invention;
FIG. 5 is a schematic view of another embodiment of a control method of an air conditioner according to the present invention;
fig. 6 is a schematic view of another embodiment of a control method of an air conditioner according to the present invention;
fig. 7 is a schematic diagram of an air conditioner according to an embodiment of the present invention.
Description of the drawings:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | |
2 | Outdoor |
| 3 | |
4 | Indoor |
| 5 | |
6 | |
| 7 | First electromagnetic valve | 8 | Second |
| 9 | Four- |
10 | Gas- |
| 11 | Pressure sensor | 12 | First temperature and |
| 13 | Second temperature and humidity sensor |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
For a better understanding of the above technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In a cold environment, the air conditioner may frost while in the heating mode.
When the system low pressure of the air conditioner is in a specific interval, a supercooling phenomenon exists, thereby causing frosting. According to experimental data tests, the supercooling situation of the heat exchanger of the outdoor unit can be known when the low pressure of the system is between-3 ℃ and-2 ℃ in the air conditioner which does not contain the adsorbing material in the embodiment. The system low pressure refers to the saturation temperature corresponding to the detected refrigerant pressure. The outdoor heat exchanger has frosting phenomenon under the condition of supercooling. At this time, in order to perform defrosting, the system low pressure may be controlled to be around 0 degrees celsius, for example, to be in an interval lower than 0.5 degrees celsius and higher than minus 0.5 degrees celsius. In this case, because the original system low pressure is in-3 degrees centigrade to-2 degrees centigrade, the supercooling can appear, and after the system low pressure is controlled to be near 0 degrees centigrade, although the defrosting effect can be achieved, the heat exchange temperature difference between the outdoor unit heat exchanger and the air is small, and the heat exchange quantity is low.
In order to defrost an air conditioner and improve the heating effect of the air conditioner, the following embodiments of an air conditioner structure and an air conditioner control method are provided.
Referring to fig. 1, the air conditioner includes a compressor 1, an outdoor heat exchanger 2, a throttling component 3, an indoor heat exchanger 4, and a dehumidification pipe section 5, wherein one end of the dehumidification pipe section 5 is communicated with an exhaust port of the compressor 1, the other end of the dehumidification pipe section 5 is connected between the throttling component 3 and the indoor heat exchanger 4, an adsorption material 6 is disposed on an outer surface of the dehumidification pipe section 5, the adsorption material 6 is disposed on an air inlet side of the outdoor heat exchanger 2, and a first electromagnetic valve 7 is disposed on the dehumidification pipe section 5. The first solenoid valve 7 is located in the dehumidification section 5 on the side remote from the sorption material 6 and close to the throttling element 3.
Alternatively, when the air conditioner operates in the heating mode, the compressor 1 discharges high-temperature and high-pressure gas, and the high-temperature and high-pressure gas flows through the indoor unit heat exchanger 2 and the dehumidification pipe section 5. Further, the indoor heat exchanger 2 condenses the high-temperature high-pressure gas to release heat, converts the high-temperature high-pressure gas into a medium-temperature medium-pressure refrigerant, the medium-temperature medium-pressure refrigerant enters the outdoor heat exchanger 4 to evaporate and absorb heat after being throttled by the throttling component 3, the refrigerant is changed into low-pressure gas after being evaporated and absorbed heat, and then the low-pressure gas returns to the compressor. Meanwhile, the high-temperature and high-pressure gas passes through the dehumidification pipe section 5 and dehumidifies the adsorption material 6, and after the adsorption material 6 is dehumidified, the moisture in the air of the environment where the adsorption material is located is adsorbed, so that the moisture content in the air is reduced, the temperature of the air is increased, and the heat exchange temperature difference between the outdoor unit heat exchanger 2 and the environment is increased.
Based on the air conditioner structure of this embodiment, after dehumidification by the adsorbing material 6, experimental data determination shows that supercooling exists only when the system low pressure is in the range of-5 ℃ to-4 ℃. In this case, after dehumidification and defrosting are performed, the heat exchange temperature difference between the outdoor heat exchanger 2 and the air increases, so that the heat exchange amount can be increased, and the heating effect can be improved.
Optionally, referring to fig. 2, fig. 2 is a schematic diagram of another embodiment of an air conditioner.
The air conditioner further includes a second solenoid valve 8. The second solenoid valve 8 is disposed on the dehumidification section 5 and between the compressor 1 and the adsorbent 6. When the second electromagnetic valve 8 is opened, the high-temperature and high-pressure gas in the compressor 1 passes through the second electromagnetic valve 8, flows through the pipe section covered by the adsorbing material 6, and plays a role in dehumidifying the adsorbing material 6, and the gas further flows out of the first electromagnetic valve 7, flows into the throttling component 3, and flows through the outdoor heat exchanger 2.
The adsorbing material 6 is a polymer material. The adsorbent 6 can adsorb water vapor in the air for dehumidification and drying. When the temperature of the adsorbing material 6 is higher than a certain temperature, water molecules in the adsorbing material 6 are released, and the temperature is the regeneration temperature. The adsorbent 6 is heated to exceed the regeneration temperature, thereby releasing the moisture therein to further dehumidify the air by the adsorbent 6.
Optionally, referring to fig. 3, fig. 3 is a schematic diagram of another embodiment of an air conditioner.
The air conditioner also comprises a four-way valve 9, a gas-liquid separator 10, a pressure sensor 11, a first temperature and humidity sensor 12 and a second temperature and humidity sensor 13. The arrows shown in fig. 3 are directed in the air flow direction.
Optionally, the throttling component is an electronic expansion valve.
When the air conditioner is in a heating mode, high-temperature and high-pressure gas in the compressor 1 passes through the four-way valve 9 and enters the indoor heat exchanger 4, the indoor heat exchanger 4 condenses and releases heat to the high-temperature and high-pressure gas to obtain a medium-temperature and medium-pressure refrigerant, the refrigerant is throttled by the throttling component 3 and enters the outdoor heat exchanger 2 to be evaporated and absorbed, the refrigerant is changed into a low-pressure gas state, passes through the four-way valve 9 and enters the gas-liquid separator 10, and then returns to the compressor 1 to complete one-time circulation. The high-temperature and high-pressure gas of the compressor 1 passes through the second electromagnetic valve 8, dehumidifies the adsorbing material 6, further passes through the first electromagnetic valve 7, enters the throttling component 3, passes through the outdoor unit heat exchanger 2, sequentially passes through the four-way valve 9 and the gas-liquid separator 10, and then flows back to the compressor 1.
Alternatively, the pressure sensor 11 is disposed at an outlet side of the outdoor unit heat exchanger 2, and is used to detect an outlet pressure. The saturation temperature corresponding to the outlet pressure is used as the low pressure of the system. The first temperature/humidity sensor 12 is configured to detect a temperature and a humidity of an environment where the outdoor heat exchanger 2 is located, and the second temperature/humidity sensor 13 is configured to detect a temperature and a humidity of an environment where the adsorbing material 6 is located.
In addition, when defrosting and dehumidifying are realized through any one of the above air conditioner embodiments, additional energy consumption is consumed without additionally adding parts such as an electric heating wire, and only a high-temperature and high-pressure gas part in the compressor 1 needs to be guided to the dehumidifying pipe section 5, so that the energy consumption of defrosting and dehumidifying can be reduced.
Based on any of the above embodiments of the air conditioner structure, the following embodiments of the control method of the air conditioner of the present invention are proposed.
Referring to fig. 4, in an embodiment, a method for controlling an air conditioner includes:
step S10, when it is detected that the defrosting condition is met, controlling the air conditioner to defrost, and detecting a first current humidity value of the adsorption material;
and step S20, when the first current humidity value is greater than or equal to the humidity threshold value, opening the first electromagnetic valve.
The defrosting condition is a condition that the air conditioner needs to meet for defrosting. The first current humidity value is the humidity value of the adsorption material detected during defrosting, or the humidity value of the adsorption material detected after defrosting is completed, or the humidity value of the adsorption material detected when the air conditioner is maintained in a working condition where frosting does not occur. The humidity threshold is a threshold indicating that the adsorbent material is excessively humid. Adsorbing material is when humidity is too high, for example when adsorbing material is supersaturated, can't effectively dehumidify the air, and the temperature is low when air humidity is high, and the heat transfer difference in temperature of off-premises station heat exchanger and air is little to it is poor to cause the heat transfer effect.
Alternatively, it is determined that the defrosting condition is satisfied when it is detected that the outdoor unit heat exchanger is in an environment where frosting is likely to occur. The frosting may occur when the temperature of the environment where the outdoor heat exchanger is located is below 0 ℃, or the frosting may occur when the temperature of the environment where the outdoor heat exchanger is located is below 0 ℃ and the saturation temperature of the outdoor heat exchanger is near 0 ℃.
Optionally, the low pressure of the system is controlled to be about 0 ℃ by adjusting the operating frequency of the compressor, and the air in the environment where the heat exchanger of the outdoor unit is located does not condense water and frost on the heat exchanger, so that the air conditioner can be defrosted. The system low pressure refers to the saturation temperature corresponding to the pressure of the heat exchanger of the outdoor unit. The saturation temperature corresponding to the outlet pressure of the outdoor unit heat exchanger can be detected. The saturation temperature corresponding to the inlet pressure of the outdoor heat exchanger can also be detected.
By defrosting and combining the structure of the air conditioner, the first electromagnetic valve is opened, the adsorption material is dehumidified by high-temperature and high-pressure gas of the compressor, and air in the environment where the outdoor unit heat exchanger is located is further dehumidified. According to the principle of isenthalpic dehumidification, air is firstly dehumidified and dried by an adsorbing material, the temperature of the air rises, and the dew point of the air is reduced. Therefore, the air is dehumidified and dried by the adsorbing material, the temperature of the air rises, and the heat exchange temperature difference between the outdoor unit heat exchanger and the air is improved, so that the heating quantity is improved, and the heating effect is improved.
Optionally, the first current humidity value is a current moisture content of air within an environment in which the adsorbent material is located. The humidity threshold is a moisture content threshold. The moisture content refers to the mass of water vapor mixed per kilogram mass of dry air. The moisture content can be calculated from the relative humidity of the humid air, the saturated water vapor pressure and the humid air pressure. The relative humidity of the wet air is obtained by detecting through a sensor, the corresponding relation table of the saturated water vapor pressure temperature and the pressure temperature is obtained by inquiring, and the wet air pressure is obtained by looking up the table.
Alternatively, the first current humidity value may be detected during controlling the air conditioner to defrost, or after controlling the air conditioner to defrost, the first current humidity value of the adsorption material may be detected.
Optionally, the air conditioner further comprises a second solenoid valve, and the first solenoid valve and the second solenoid valve are opened when the first current humidity value is greater than or equal to the humidity threshold value.
Optionally, when the air conditioner is turned on, the first electromagnetic valve is controlled to be in a closed state, when the heating mode is turned on and the defrosting condition is detected to be met, the air conditioner is controlled to start, the first current humidity value of the adsorbing material is detected, and when the first current humidity value is greater than or equal to the humidity threshold value, the first electromagnetic valve is opened.
Optionally, when the air conditioner is in the cooling mode, the first electromagnetic valve is closed, or the first electromagnetic valve and the second electromagnetic valve are closed.
Adopt above-mentioned mode, can heat the operation period at the air conditioner, judge whether the adsorption material is saturated based on humidity, whether too high at adsorption material humidity, perhaps whether supersaturated, when humidity is too high or supersaturated, dehumidification effect is relatively poor, and air humidity is high, and the temperature is low, and the heat transfer difference in temperature of off-premises station heat exchanger and air is little, and the heat transfer volume is low, causes the heating effect poor. In order to improve the heating effect, the first electromagnetic valve is opened, and the adsorption material is heated and regenerated by using high-temperature and high-pressure gas discharged by the compressor, so that the dehumidification capacity of the adsorption material is improved, and the heating effect of the air conditioner during defrosting operation is further improved.
In this embodiment, the air conditioner includes compressor, off-premises station heat exchanger, throttle part, indoor heat exchanger and dehumidification pipeline section, and the one end of dehumidification pipeline section communicates with the gas vent of compressor, and the other end of dehumidification pipeline section is connected between throttle part and indoor heat exchanger, and the surface of dehumidification pipeline section is equipped with the adsorption material, and the adsorption material setting is provided with first solenoid valve on the dehumidification pipeline section in the air inlet side of off-premises station heat exchanger. Based on the structure of the air conditioner, when the condition that the defrosting condition is met is detected, the air conditioner is controlled to defrost, and a first current humidity value of the adsorption material is detected; and when the first current humidity value is greater than or equal to the humidity threshold value, opening the first electromagnetic valve. Therefore, under the defrosting working condition of the air conditioner, the moisture in the air can be adsorbed by the adsorbing material, so that the air is dried, and the heat exchange temperature difference between the heat exchanger of the outdoor unit and the temperature is improved. When the humidity of the adsorption material is too high, the adsorption material is heated by high-temperature gas in the compressor to be regenerated, so that water in the adsorption material is released, and the adsorption material can adsorb water in the air after being dried, so that the humidity of the air is reduced. Under the condition that the air humidity is lower, the temperature is higher, so that the heat exchange temperature difference between the outdoor unit heat exchanger and the air can be increased, the heat exchange quantity is increased, and the heating effect is improved. Therefore, the invention can control the air conditioner to defrost and improve the heating effect, thereby improving the thermal comfort of users in the space where the air conditioner acts.
Referring to fig. 5, a further embodiment of an air conditioner control method is provided based on any of the embodiments of the air conditioner structure and the control method of the air conditioner. After step S10, the method further includes:
step S30, when the first current humidity value is greater than or equal to the humidity threshold, opening the first electromagnetic valve, reducing the operating frequency of the compressor, and after reducing the operating frequency, obtaining a first dew point temperature and a first saturation temperature of an environment where the outdoor heat exchanger is located;
and step S40, when the first dew point temperature is less than the first saturation temperature, returning to the step of reducing the operating frequency of the compressor.
The first dew point temperature is the dew point temperature of the environment where the outdoor unit heat exchanger is located after the operation frequency of the compressor is reduced. The first saturation temperature is a saturation temperature of the heat exchanger of the outdoor unit detected after the operation frequency of the compressor is reduced.
Alternatively, the temperature and humidity may be detected by a temperature and humidity sensor disposed on a surface of the outdoor unit sensor, and the first dew point temperature may be calculated by combining the temperature and the humidity.
Optionally, the pressure at the outlet of the heat exchanger of the outdoor unit is detected, and the saturation temperature corresponding to the pressure is determined to be the first saturation temperature.
Alternatively, when the first dew point temperature is less than the first saturation temperature, returning to the step of reducing the operating frequency of the compressor, and continuing to execute the cycle until the first dew point temperature is greater than or equal to the first saturation temperature, and exiting the cycle, so that the first saturation temperature can be maintained below the first dew point temperature by adjusting the operating frequency of the compressor. The air conditioner has the advantages that the phenomenon that water vapor in the air is converted into liquid is avoided as far as possible, so that the moisture content of the air is lower, the temperature is higher, the temperature difference between the outdoor unit heat exchanger and the air is larger, the heat exchange quantity is improved, and the heating effect of the air conditioner during defrosting operation is further improved.
In an embodiment, after the step of obtaining the first dew point temperature and the first saturation temperature of the environment where the outdoor heat exchanger is located, the method further includes:
when the first dew point temperature is greater than or equal to the first saturation temperature and the first saturation temperature is greater than a target temperature, detecting a second current humidity value of the adsorbing material, wherein the target temperature is obtained according to the first dew point temperature and is lower than the first dew point temperature;
and when the second current humidity value is larger than the humidity threshold value, returning to the step of reducing the running frequency of the compressor.
The second current humidity value is the current humidity value of the air in the environment where the adsorption material is detected after the first dew point temperature is detected to be within the range from the target temperature to the first saturation temperature. Because the environment is continuously in a changing state, whether the moisture content of the environment in which the adsorption material is located is too high needs to be continuously detected, and if the moisture content is too high, the adsorption material may be close to saturation, the dehumidification capacity is reduced, and therefore the operation frequency of the compressor needs to be reduced again.
Optionally, the second current humidity value is the moisture content of the air in the environment in which the sorption material is located.
Optionally, when the first dew point temperature is greater than or equal to the first saturation temperature and the first saturation temperature is greater than the target temperature, a second current humidity value of the adsorption material is detected at regular time, and when the second current humidity value is greater than a humidity threshold value, the step of reducing the operating frequency of the compressor is returned to.
Optionally, the target temperature is a difference between the first dew point temperature and a preset error value. The predetermined error value is a positive number. For example, if the preset error value is 3 degrees celsius, the target temperature is a difference value obtained by subtracting 3 degrees celsius from the first dew point temperature. Through adjusting the compressor operating frequency, the first saturation temperature is maintained between the target temperature and the first dew point temperature, so that the heating effect can be further improved, and the condition that the compressor operating frequency is too low is avoided.
Alternatively, the humidity threshold may be a humidity detected by a sensor disposed on or near the surface of the outdoor heat exchanger, or may be a value selected from a preset humidity table, which is less than the humidity of the air where the outdoor heat exchanger is located and is closest to the humidity.
In one embodiment, after the step of detecting the second current humidity value of the adsorption material, the method further includes:
and when the second current humidity value is smaller than or equal to the humidity threshold value, closing the first electromagnetic valve.
When the second current humidity value is smaller than or equal to the humidity threshold value, the adsorption material still has certain adsorption capacity, the air can be continuously dried, and at the moment, the first electromagnetic valve is closed, so that excessive consumption of high-temperature and high-pressure gas in the compressor is avoided.
Optionally, the first moisture content is calculated according to the humidity and the temperature detected by a sensor arranged near or avoided by the outdoor unit heat exchanger, the first moisture content is used as a humidity threshold value, the second moisture content is calculated according to the temperature and the humidity detected by a sensor arranged near or on the surface of the adsorption material, the second moisture content is used as a second current humidity value, when the second current humidity value is greater than or equal to the humidity threshold value, the operation frequency of the compressor is returned to be reduced, and when the second current humidity is less than the humidity threshold value, the first electromagnetic valve is closed. Therefore, normal air humidity can be reflected through the air humidity around the outdoor unit heat exchanger, whether the adsorption material is supersaturated or not is detected by taking the humidity as a reference, and when the adsorption material is supersaturated, the operation frequency of the compressor is reduced to improve the temperature of the air, and meanwhile, the first electromagnetic valve is opened or maintained to be opened so as to dehumidify the adsorption material.
In the embodiment, when the first current humidity value is greater than or equal to the humidity threshold value, the first electromagnetic valve is opened, the operating frequency of the compressor is reduced, and after the operating frequency is reduced, a first dew point temperature and a first saturation temperature of the environment where the outdoor unit heat exchanger is located are obtained; and when the first dew point temperature is lower than the first saturation temperature, returning to the step of reducing the operating frequency of the compressor. Therefore, during the heating operation of the air conditioner, the operation frequency of the compressor is adjusted, so that the low pressure of the system, namely the first saturation temperature is controlled below the first dew point temperature, the high-humidity air passing through the adsorption material is dehumidified, the adsorption material is heated, and meanwhile, the air outside the room is heated, so that the temperature of the air passing through the heat exchanger of the outdoor unit is increased, the heat exchange temperature difference between the heat exchanger of the outdoor unit and the air is increased, the heating quantity is greatly increased, and the heating effect is improved.
Referring to fig. 6, a further embodiment of a control method of an air conditioner is provided based on any of the embodiments of the air conditioner structure and any of the embodiments of the control method of the air conditioner. Before step S10, the method further includes:
step S50, detecting a second saturation temperature of an environment where the outdoor heat exchanger is located;
and step S60, when the second saturation temperature is in a preset frosting temperature range, determining that the defrosting condition is met.
The second saturation temperature is a saturation temperature of an environment where the outdoor heat exchanger is located before the air conditioner satisfies the defrosting condition. The preset frosting temperature interval is a preset saturation temperature interval which can cause frosting of the heat exchanger of the outdoor unit.
Optionally, the preset frosting temperature interval is an interval below 0 ℃. Or, a temperature value smaller than 0 ℃ can be selected as an upper bound, and an interval smaller than the upper bound is used as a preset frosting temperature interval. For example, the range of less than-0.5 ℃ is used as the preset frosting temperature range.
Alternatively, the defrosting condition may be regarded as a frosting condition, and when the second saturation temperature of the outdoor heat exchanger is within the preset frosting temperature range, frosting may occur, so as to determine that the frosting condition is satisfied, and since defrosting is required when frosting occurs, the defrosting condition is further satisfied.
In one embodiment, the step of controlling the air conditioner to defrost includes:
when the second saturation temperature is within the preset frosting temperature range and is lower than 0 ℃, reducing the running frequency of the compressor according to a first preset step length;
and controlling the compressor to operate according to the reduced operating frequency, and returning to the step of detecting the second saturation temperature of the environment where the heat exchanger of the outdoor unit is located.
And when the second saturation temperature is not in the preset frosting temperature range, the frosting does not occur, and the defrosting is not needed. Therefore, the loop exit condition for loop detection of the second saturation temperature in the above flow may be: and stopping detecting the second saturation temperature of the environment where the heat exchanger of the outdoor unit is located when the second saturation temperature is detected not to be within the preset frosting temperature range.
By adjusting the operating frequency of the compressor, when the second saturation temperature is within the preset frosting temperature range, the operating frequency of the compressor is reduced, so that the saturation temperature of the heat exchanger of the outdoor unit is changed until the second saturation temperature is not within the preset frosting temperature range, and therefore air passing through the heat exchanger of the outdoor unit cannot be condensed into frost.
Optionally, when the second saturation temperature is not within the preset frosting temperature range, it may be further detected whether the second saturation temperature is greater than an upper bound of the preset frosting temperature range, if so, the operating frequency of the compressor is increased, the second saturation temperature is re-detected after the operating frequency of the compressor is increased, and whether the operating frequency of the compressor needs to be further increased or reduced is determined according to the second saturation temperature.
In one embodiment, the step of controlling the air conditioner to defrost and detecting the first current humidity value of the adsorption material includes:
controlling the air conditioner to defrost, and detecting a third saturation temperature of the environment where the outdoor unit heat exchanger is located again;
and when the third saturation temperature is not within the preset frosting temperature range, controlling the compressor to operate according to the current operation frequency, and detecting the first current humidity value of the adsorption material.
The third saturation temperature is the saturation temperature of the outdoor heat exchanger detected again after the air conditioner is controlled to defrost. And when the third saturation temperature is not in the preset frosting temperature range, controlling the compressor to operate according to the current operating frequency, so that the air conditioner cannot be frosted. On the basis, the high-temperature and high-pressure gas discharged by the compressor and the dehumidification pipeline are used for dehumidifying the adsorption material, so that the heating effect is improved.
In the embodiment, the second saturation temperature of the environment where the outdoor heat exchanger is located is detected; and when the second saturation temperature is within the preset frosting temperature range, determining that the defrosting condition is met. Therefore, whether frosting happens or not can be detected according to the saturation temperature of the outdoor unit heat exchanger, and if frosting happens, defrosting is carried out so as to defrost the outdoor unit heat exchanger in time and improve the heating effect during defrosting operation.
In the following, based on the structure of the air conditioner, an implementation manner of the control method of the air conditioner is described in combination with a specific scenario.
When the air conditioner is in heating operation, the compressor is started, the four-way valve is powered on, the electronic expansion valve is opened, the first electromagnetic valve and the second electromagnetic valve are closed, and the outdoor fan is started. The method comprises the steps of detecting the pressure of an outlet of a heat exchanger of the outdoor unit through a pressure sensor, determining the saturation temperature corresponding to the pressure, reducing the running frequency of the compressor by 1Hz when the saturation temperature is less than 0 ℃, returning to the detection of the saturation temperature, controlling the running frequency of the compressor to maintain the current running frequency when the saturation temperature is greater than or equal to 0 ℃ and less than 0.5 ℃, and increasing the running frequency of the compressor by 1Hz when the saturation temperature is greater than 0.5 ℃. Therefore, the air conditioner can operate under the working condition that frosting does not occur by controlling the operation frequency of the compressor.
After the operation frequency of the compressor is controlled to maintain the current operation frequency, detecting a first moisture content of an outdoor unit heat exchanger and a second moisture content of an adsorption material, opening a first electromagnetic valve and a second electromagnetic valve when the second moisture content is greater than or equal to the first moisture content, and simultaneously reducing the operation frequency of the compressor to control the low pressure of a system, namely the saturation temperature to be [ T-3 ℃, T ], wherein T is the dew point temperature, and the unit of the interval is centigrade degree; and then, re-detecting the third moisture content of the heat exchanger of the outdoor unit and the fourth moisture content of the adsorbing material, closing the first electromagnetic valve and the second electromagnetic valve when the fourth moisture content is smaller than the third moisture content, and keeping the first electromagnetic valve and the second electromagnetic valve open and reducing the running frequency of the compressor when the fourth moisture content is larger than or equal to the third moisture content.
By adopting the mode, the heating effect can be improved when the air conditioner performs defrosting operation.
As one implementation manner, the control method of the air conditioner may involve a hardware environment architecture as shown in fig. 7.
Specifically, the hardware architecture related to the control method of the air conditioner is the air conditioner.
As one implementation, the air conditioner includes: a processor 101, such as a CPU, a memory 102, and a communication bus 103. Wherein a communication bus 103 is used for enabling the connection communication between these components. The processor 102 is used to invoke an application program to perform control operations.
The memory 102 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory).
It is understood that, in an embodiment, a control program for implementing a control process of the air conditioner is stored in the memory 102 of the air conditioner, and the processor 101 calls the control program from the memory 102 and executes the control program to implement the above embodiments.
It is understood that the air conditioner includes a processor, a memory and a control program stored in the memory, and the processor controls the air conditioner to perform the various embodiments of the control method of the air conditioner as described above when calling the control program.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for causing an air conditioner to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A control method of an air conditioner is characterized in that the air conditioner comprises a compressor, an outdoor unit heat exchanger, a throttling component, an indoor heat exchanger and a dehumidification pipe section, one end of the dehumidification pipe section is communicated with an exhaust port of the compressor, the other end of the dehumidification pipe section is connected between the throttling component and the indoor heat exchanger, an adsorption material is arranged on the outer surface of the dehumidification pipe section and is arranged on the air inlet side of the outdoor unit heat exchanger, a first electromagnetic valve is arranged on the dehumidification pipe section, and the method comprises the following steps:
when the condition that the defrosting condition is met is detected, controlling the air conditioner to defrost, and detecting a first current humidity value of the adsorbing material;
and when the first current humidity value is greater than or equal to a humidity threshold value, opening the first electromagnetic valve.
2. The method of claim 1, wherein after the step of detecting the first current humidity value of the adsorbent material, the method further comprises:
opening the first solenoid valve when the first current humidity value is greater than or equal to the humidity threshold value, and,
reducing the operating frequency of the compressor, and obtaining a first dew point temperature and a first saturation temperature of the environment where the outdoor unit heat exchanger is located after reducing the operating frequency;
and when the first dew point temperature is lower than the first saturation temperature, returning to the step of reducing the operating frequency of the compressor.
3. The method of claim 2, wherein the step of obtaining the first dew point temperature and the first saturation temperature of the environment in which the outdoor heat exchanger is located further comprises:
when the first dew point temperature is greater than or equal to the first saturation temperature and the first saturation temperature is greater than a target temperature, detecting a second current humidity value of the adsorbing material, wherein the target temperature is obtained according to the first dew point temperature and is lower than the first dew point temperature;
and when the second current humidity value is larger than the humidity threshold value, returning to the step of reducing the running frequency of the compressor.
4. The method of claim 3, wherein the step of detecting the second current humidity value of the adsorbent material is followed by:
and when the second current humidity value is smaller than or equal to the humidity threshold value, closing the first electromagnetic valve.
5. The method according to any one of claims 1 to 4, wherein before the step of controlling the air conditioner to defrost upon detecting that the air conditioner satisfies the defrost condition, further comprising:
detecting a second saturation temperature of the environment where the outdoor unit heat exchanger is located;
and when the second saturation temperature is within a preset frosting temperature range, determining that the defrosting condition is met.
6. The method as set forth in claim 5, wherein the step of controlling the air conditioner to defrost comprises:
when the second saturation temperature is within the preset frosting temperature range and is lower than 0 ℃, reducing the running frequency of the compressor according to a first preset step length;
and controlling the compressor to operate according to the reduced operating frequency, and returning to the step of detecting the second saturation temperature of the environment where the heat exchanger of the outdoor unit is located.
7. The method of claim 5, wherein the step of controlling the air conditioner to defrost and detecting the first current humidity value of the adsorption material comprises:
controlling the air conditioner to defrost, and detecting a third saturation temperature of the environment where the outdoor unit heat exchanger is located again;
and when the third saturation temperature is not within the preset frosting temperature range, controlling the compressor to operate according to the current operation frequency, and detecting the first current humidity value of the adsorption material.
8. An air conditioner, characterized in that the air conditioner comprises a memory, a processor, and a control program of the air conditioner stored on the memory and executable on the processor, the control program of the air conditioner realizing the steps of the control method of the air conditioner according to any one of claims 1 to 7 when executed by the processor.
9. The air conditioner according to claim 8, further comprising a compressor, an outdoor heat exchanger, a throttling part, an indoor heat exchanger, and a dehumidifying pipe section, wherein one end of the dehumidifying pipe section is communicated with a discharge port of the compressor, the other end of the dehumidifying pipe section is connected between the throttling part and the indoor heat exchanger, an adsorbing material is disposed on an outer surface of the dehumidifying pipe section, the adsorbing material is disposed on an air inlet side of the outdoor heat exchanger, and a first solenoid valve is disposed on the dehumidifying pipe section.
10. A computer-readable storage medium, characterized in that a control program of an air conditioner is stored thereon, which when executed by a processor implements the steps of the control method of the air conditioner according to any one of claims 1 to 7.
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