CN111780224B - Air conditioning system and control method thereof - Google Patents
Air conditioning system and control method thereof Download PDFInfo
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- CN111780224B CN111780224B CN202010641315.XA CN202010641315A CN111780224B CN 111780224 B CN111780224 B CN 111780224B CN 202010641315 A CN202010641315 A CN 202010641315A CN 111780224 B CN111780224 B CN 111780224B
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/70—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
- F24F11/875—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling heat-storage apparatus
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
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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
- F24F2120/00—Control inputs relating to users or occupants
- F24F2120/20—Feedback from users
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
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- Mathematical Physics (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioning system and a control method thereof, wherein the air conditioning system comprises an outdoor heat exchanger and a heat storage device, the heat storage device comprises a refrigerant pipeline and a heat storage medium pipeline, the refrigerant pipeline is connected with the outdoor heat exchanger in parallel, the heat storage medium pipeline comprises a heat exchange box provided with a heat storage medium, and the refrigerant pipeline penetrates through the heat exchange box to exchange heat. The invention can store and release heat in the outdoor unit, realize heat transfer, fully utilize heat, release heat to heat the outdoor heat exchanger when a user sleeps at night, prolong the defrosting time interval at night, reduce defrosting times and reduce noise at night.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning system and a control method thereof.
Background
In winter, the outdoor environment temperature is low, and after the air conditioner is heated for a certain time, the outdoor heat exchanger gradually frosts to influence the heating capacity of the air conditioner, so that the defrosting needs to be performed regularly to ensure the reliable operation of the air conditioner.
The air conditioner usually performs defrosting through heating to cooling, however, when the air conditioner performs heating to cooling, reversing operation of a four-way valve is required, and the frequency of a compressor is obviously changed, so that relatively large noise is generated. When the outdoor temperature is low and the environment humidity is high, the number of times of defrosting of the air conditioner in late night is possibly high, the number of times of noise generation is also high, and the user experience is influenced.
Disclosure of Invention
The invention solves the problems that the air conditioner has larger times of defrosting in late night and higher times of noise generation.
In order to solve the problems, the invention provides an air conditioning system which comprises an outdoor heat exchanger and a heat storage device, wherein the heat storage device comprises a refrigerant pipeline and a heat storage medium pipeline, the refrigerant pipeline is connected with the outdoor heat exchanger in parallel, the heat storage medium pipeline comprises a heat exchange box provided with a heat storage medium, and the refrigerant pipeline penetrates through the heat exchange box to exchange heat.
By providing the thermal storage device to include a two-part conduit: the refrigerant pipeline and the heat storage medium pipeline are connected in parallel, the heat storage device can shunt part of refrigerant flowing to the outdoor heat exchanger for heat storage, the outdoor heat exchanger is used for heat release when needed, the temperature of the outdoor heat exchanger is improved, the frost thickening possibility of the outdoor heat exchanger is reduced, the defrosting time is delayed, when a user sleeps at night, heat is released to heat the outdoor heat exchanger, the night defrosting time interval can be prolonged, the defrosting times are reduced, and the night noise is reduced.
Optionally, the heat storage medium pipeline further comprises a heat release section pipeline, and the heat release section pipeline is arranged adjacent to the outdoor heat exchanger.
The heat releasing section pipeline is arranged at the adjacent position of the outdoor heat exchanger, when releasing heat, the heat releasing section pipeline releases heat, the heat exchanger outside the heating chamber comprises the fins on the heat exchanger outside the heating chamber, the temperature of the fins on the outdoor heat exchanger can be improved, when a frost layer exists on the fins, the defrosting layer can be melted, and the defrosting time is delayed or the defrosting is finished as early as possible.
Optionally, the heat storage medium pipeline further comprises a pump, and the pump is used for pumping the heat storage medium from the heat exchange tank into the heat release section pipeline when the heat storage device releases heat. The heating of the outdoor heat exchanger can be realized, and further, a frost layer possibly existing on the surface of the outdoor heat exchanger is melted.
Optionally, the refrigerant pipeline further includes a first switch and a second switch, the first switch and the second switch are respectively disposed on two sides of the heat exchange box, and the first switch and the second switch are used for conducting the refrigerant pipeline when the heat storage device stores heat, so that a high-temperature refrigerant sent by the compressor during refrigeration of the air conditioning system circulates in the refrigerant pipeline.
Through the setting of first switch and second switch, control switching on and cuting of refrigerant pipeline, and then switch on at the time of the heat accumulation time control refrigeration medium pipeline, the refrigerant gets into the refrigerant pipeline and realizes the heat accumulation, cuts at the time of non-heat accumulation time control refrigeration medium pipeline, avoids the refrigerant to get into the refrigerant pipeline, influences normal heating operation or exothermal process, maintains the reliability of air conditioner operation.
The invention also provides a control method of the air conditioning system, which is applied to the air conditioning system and comprises the following steps:
after the air conditioning system is started in a heating mode, judging whether a sleep anti-interference condition of a user is achieved;
when the sleep anti-interference condition of the user is achieved, acquiring a first parameter, and judging whether a first preset defrosting condition is achieved or not based on the first parameter;
when the first preset defrosting condition is achieved, controlling the heat storage device to release heat;
and controlling the heat storage device to finish heat release, and controlling the air conditioning system to enter a defrosting mode when the second preset defrosting condition is judged to be achieved.
The high-temperature refrigerant flowing to the outdoor heat exchanger during defrosting is used as a heat storage heat source for heat storage, and the stored heat is used for heating the outdoor heat exchanger, so that the defrosting time interval is prolonged, the defrosting times are reduced, the noise at night is reduced, the heat during defrosting is fully utilized, the full utilization of resources is realized, and the resource waste is avoided.
Optionally, after the air conditioning system is started to heat, determining whether a sleep disturbance prevention condition of the user is achieved includes:
when the sleep anti-interference condition of the user is not achieved, acquiring a second parameter, and judging whether a preset condition is achieved or not based on the second parameter, wherein the preset condition comprises that the air-conditioning system is in a defrosting mode; and when the preset condition is judged to be achieved, controlling the heat storage device to store heat.
The part of the redundant heat in the defrosting process is stored and used in other scenes needing heat, for example, the outdoor heat exchanger is heated when the temperature of the outdoor heat exchanger is too low, so that the time for entering the defrosting mode is delayed, meanwhile, the redundant heat in the defrosting mode is fully utilized, and the heat waste is avoided.
Optionally, the preset condition further includes: the temperature of the defrosting temperature sensing bulb is greater than or equal to T ℃, the temperature rise change rate is greater than or equal to a preset value, and the value range of T is-0.5. The heat storage time can be accurately determined, the defrosting waste heat can be fully utilized, and the heat waste is avoided.
Optionally, the preset condition further includes: in a first period of a preset time period, the temperature rise amplitude of the defrosting bulb is smaller than a first preset amplitude, and in a second period of the preset time period, the temperature rise amplitude of the defrosting bulb is larger than or equal to a second preset amplitude, wherein the preset time period is composed of the first period and the second period, and the first period is before the second period. Based on the temperature change phenomenon, the time point for starting heat storage is determined, so that after actual defrosting is basically completed, a part of high-temperature refrigerant is separated to provide a heat source for the heat storage device, at the moment, the heat required by defrosting is not much, the amount of the refrigerant entering a refrigerant pipeline of the heat storage device is less, the better defrosting effect is not obtained, and meanwhile, the redundant heat in a defrosting mode can be fully utilized, and the heat waste is avoided.
Optionally, the preset condition further includes: the defrosting accumulated time is greater than or equal to a first preset time. By counting the defrosting time, when the defrosting accumulated time is greater than or equal to the first preset time length, the heat storage is judged to be started, the judgment mode is simpler, the operation resources can be saved, and the time point of the heat storage can be judged so as to avoid the adverse effect of the heat storage mode on normal defrosting.
Optionally, when the outdoor ambient temperature is greater than or equal to the first temperature, the first preset defrosting condition is that the temperature of the defrosting bulb is less than the second temperature, and when the outdoor ambient temperature is less than the second temperature, the first preset defrosting condition is that the low-temperature heating operation time of the air conditioning system is greater than or equal to the second preset time. Whether the first preset defrosting condition is achieved or not is judged by combining the outdoor environment temperature, the defrosting temperature sensing bulb temperature and the low-temperature heating operation time length so as to determine whether heat is released or not, the heat releasing time can be accurately determined, the defrosting time interval can be prolonged, the defrosting times are reduced, and the noise generation frequency is reduced.
Optionally, the first preset defrosting condition is that the temperature of the defrosting bulb is lower than a third temperature, the second preset defrosting condition is that the temperature of the defrosting bulb is lower than a fourth temperature, and the third temperature is higher than or equal to the fourth temperature. The accurate heat release time can be determined, the time of entering defrosting is delayed on the premise of ensuring timely defrosting and maintaining the reliability of the air conditioner, the switching times of the four-way reversing valve are reduced, and the noise at night is reduced.
Optionally, the user sleep tamper-proof condition comprises at least one of:
the current time belongs to a time period corresponding to night, the outdoor light intensity is smaller than the preset illumination intensity, the indoor noise intensity is smaller than the preset sound intensity, and a user in a sleeping state exists indoors.
Through setting up user's sleep jam-proof condition, confirm the size of noise to user experience influence, carry out the heat accumulation when the noise is not big to user experience influence, release heat when the noise is big to user experience influence, guarantee user experience, in time the heat accumulation simultaneously.
Drawings
FIG. 1 is a schematic view of an embodiment of an air conditioning system according to the present invention;
FIG. 2 is a schematic diagram of an embodiment of a control method for an air conditioning system according to the present invention;
fig. 3 is a schematic diagram of another embodiment of the control method of the air conditioning system according to the present invention.
Description of reference numerals:
1-outdoor heat exchanger; 2-a thermal storage device; 21-a heat exchange box; 22-a first switch; 23-a second switch; 3-indoor heat exchanger; 4-a compressor; 5-electronic expansion valve.
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.
The invention provides an air conditioning system. FIG. 1 is a schematic diagram of an air conditioning system according to an embodiment of the present invention. As shown in fig. 1, the air conditioning system includes: the outdoor heat exchanger 1, heat storage device 2 includes refrigerant pipeline and heat accumulation medium pipeline, the refrigerant pipeline with outdoor heat exchanger 1 connects in parallel, the heat accumulation medium pipeline is including setting up the heat transfer case 21 of heat accumulation medium, the refrigerant pipeline passes heat transfer case 21 carries out the heat transfer.
The air conditioning system comprises conventional air conditioning components such as an outdoor heat exchanger 1, a compressor 4, an indoor heat exchanger 3 and an electronic expansion valve 5, and further comprises a heat storage device 2 arranged on an outdoor unit. The thermal storage device 2 has a thermal storage function and a heat release function, and is composed of two portions, one portion is a refrigerant line, and the other portion is a thermal storage medium line, where the thermal storage medium may be a fluid such as water.
The refrigerant pipeline is connected in parallel with the outdoor heat exchanger 1, so that in the heat storage process of the heat storage device 2, one part of high-temperature refrigerant flows to the outdoor heat exchanger 1, the other part of high-temperature refrigerant flows into the refrigerant pipeline, and the refrigerant pipeline penetrates through the heat exchange box 21, so that the high-temperature refrigerant circulating in the refrigerant pipeline can heat the heat storage medium in the heat exchange box 21, the temperature of the heat storage medium is increased, and heat storage is realized. In the heat release process of the heat storage device 2, the high-temperature heat storage medium is cooled to release heat.
By arranging the thermal storage device 2 to include two portions of piping: the refrigerant pipeline and the heat storage medium pipeline ensure the heat storage and heat release functions of the heat storage device 2, wherein the refrigerant pipeline is connected with the outdoor heat exchanger 1 in parallel, the heat storage device 2 can branch part of refrigerant flowing to the outdoor heat exchanger 1 to store heat, and release heat for the outdoor heat exchanger 1 when needed, so that the temperature of the outdoor heat exchanger 1 is increased, the possibility of thick frost formation of the outdoor heat exchanger 1 is reduced, and the defrosting time is delayed.
Optionally, the heat storage medium pipeline further comprises a heat release section pipeline, and the heat release section pipeline is arranged adjacent to the outdoor heat exchanger 1.
The heat storage medium pipeline comprises a heat release section pipeline for releasing heat, besides a heat exchange box 21 for storing heat, the heat release section pipeline is arranged at the adjacent position of the outdoor heat exchanger 1, when releasing heat, the heat release section pipeline releases heat, the outdoor heat exchanger 1 is heated, the fins on the outdoor heat exchanger 1 are heated, the temperature of the fins on the outdoor heat exchanger 1 can be increased, when frost layers exist on the fins, the defrosting layers can be melted, and defrosting time is delayed or defrosting is finished as early as possible.
Optionally, the heat storage medium pipeline further comprises a pump for pumping the heat storage medium from the heat exchange tank 21 into the heat release section pipeline when the heat storage device 2 releases heat.
When heat is released, the high-temperature heat storage medium in the heat exchange box 21 enters the heat release section pipeline from the heat exchange box 21, and the high-temperature heat storage medium in the heat exchange box 21 is pumped into the heat release section pipeline through the pump to heat the outdoor heat exchanger 1, so that a frost layer possibly existing on the surface of the outdoor heat exchanger 1 is melted.
Optionally, the refrigerant pipeline further includes a first switch 22 and a second switch 23, the first switch 22 and the second switch 23 are respectively disposed on two sides of the heat exchange box 21, and the first switch 22 and the second switch 23 are configured to conduct the refrigerant pipeline when the heat storage device 2 stores heat, so that a high-temperature refrigerant sent by the compressor 4 during refrigeration of the air conditioning system circulates in the refrigerant pipeline.
The first switch 22 and the second switch 23 can be selected as electromagnetic valves, when in heat storage, the first switch 22 and the second switch 23 are opened, and high-temperature and high-pressure refrigerant flows into the heat storage device 2 (refrigerant pipeline) through the second switch 23 and then flows out of the first switch 22; when the thermal storage device 2 is not in the thermal storage mode (e.g., the normal heating mode or when the thermal storage device 2 releases heat), the first switch 22 and the second switch 23 are closed, and the refrigerant cannot enter the thermal storage device 2.
Through the setting of first switch 22 and second switch 23, control switching on and cuting of refrigerant pipeline, and then the refrigerant pipeline switches on when heat accumulation, and the refrigerant gets into the refrigerant pipeline and realizes the heat accumulation, and the refrigerant pipeline cuts when non-heat accumulation, avoids the refrigerant to get into the refrigerant pipeline, influences normal heating operation or exothermal process, maintains the reliability of air conditioner operation.
The invention provides a control method of an air conditioning system, which is applied to the air conditioning system. For the purpose of understanding the present invention, its principles will first be briefly described. When the air conditioner is operated for heating in winter, the outdoor environment temperature is low, heating is performed in a low-temperature environment, the outdoor heat exchanger 1 is prone to frosting, after the preset defrosting starting condition is met, the air conditioner is switched to a refrigerating operation mode, the four-way valve is reversed to perform refrigerating operation, the compressor 4 sends high-temperature refrigerants to the outdoor heat exchanger 1 to improve the temperature of the outdoor heat exchanger 1, a frost layer is removed, and the normal heating operation is returned after the defrosting exiting condition is met. The high-temperature refrigerant has a high temperature, and can be used as a heat source of the heat storage device 2 to heat the heat storage medium while being used for heat exchange of the outdoor heat exchanger 1, so that heat storage of the heat storage device 2 is realized.
Fig. 2 is a schematic diagram of an embodiment of a control method of an air conditioning system according to the present invention. As shown in fig. 2, the control method includes:
step S10, after the air conditioning system is started to heat, judging whether the sleep anti-interference condition of the user is achieved;
the user sleep interference prevention condition includes at least one of: the current time belongs to a time period corresponding to night, the outdoor light intensity is smaller than the preset illumination intensity, the indoor noise intensity is smaller than the preset sound intensity, and a user in a sleeping state exists indoors. Any one or a combination of any plurality thereof may be used.
The corresponding time period at night is a time period preset by a user or a time period preset by an air conditioning system in a default mode, and can be selected to be 22: 00-8: 00 or 23: 00-7: 00, the user generally sleeps at night, and at the moment, sleep anti-interference control needs to be carried out on the user. If the current time does not belong to the time period corresponding to night but belongs to the time period corresponding to daytime, the user does not generally sleep in daytime, so that the sleep interference prevention control of the user is not needed, and the heat storage device 2 does not need to release heat.
When the outdoor light intensity is high, the user does not sleep at a high probability, and at the moment, the sleep of the user is not interfered by indoor noise, so that the user can directly enter a defrosting mode to store heat if the condition of entering the defrosting mode is met; when the outdoor light intensity is low, the user is likely to sleep, at the moment, the sleep of the user is possibly influenced by indoor noise, the sleep anti-interference control of the user is needed, the heat storage device 2 releases heat, and the defrosting time can be delayed or the defrosting can be finished in the early time. The preset illumination intensity is an illumination threshold value which is default and preset by the air conditioning system.
When indoor noise intensity is great, the noise that produces when air conditioning system defrosts can not cause too big influence to indoor user, is difficult for being perceived by indoor user even, need not to carry out user sleep jam-proof control this moment, if satisfy the condition that gets into the defrost mode this moment, can directly get into defrost mode heat accumulation. When the indoor noise intensity is small, the indoor user can be greatly influenced and is easily perceived by the indoor user, and the user sleep anti-interference control is needed at the moment. The preset sound intensity is a default preset sound intensity threshold value of the air conditioning system.
The indoor unit is provided with the preset sensor, such as an infrared sensor, a heart rate sensor and the like, so that whether a user sleeps indoors or not can be directly detected, sleep anti-interference control of the user is needed when the user sleeps, and sleep anti-interference control of the user is not needed when the user does not sleep. Here, the relevant step of determining whether there is a user sleeping is the prior art, and is not described here.
Step S20, when the sleep anti-interference condition of the user is achieved, acquiring a first parameter, and judging whether a first preset defrosting condition is achieved or not based on the first parameter;
a step S30 of controlling the heat storage device 2 to release heat when the first preset defrosting condition is achieved;
when the user sleep anti-interference condition is achieved, user sleep anti-interference control is required, at the moment, the heat release time is determined based on the first preset defrosting condition, the heat storage device 2 is controlled to release heat, after the heat release is completed, the second preset defrosting condition is met, then the four-way valve enters the defrosting mode, and the four-way valve is operated in a reversing mode for converting heating into cooling, so that the time for entering the defrosting mode can be delayed, and the times for generating noise are reduced.
The first preset defrosting condition is used for judging the time when the outdoor heat exchanger frosts or has a frosting risk or frosts thinly, namely controlling the time when the heat storage device 2 releases heat. Optionally, the first preset defrost condition comprises at least one of: the temperature of the defrosting temperature sensing bulb is less than the preset temperature, and the low-temperature heating operation time of the air conditioning system is greater than or equal to a first time (the value range is 1 h-2 h). Wherein the preset temperature range is-18 ℃ to-13 ℃.
Optionally, the first preset defrosting condition is that the low-temperature heating operation time of the air conditioning system is longer than or equal to a certain time (the value range is 1 h-2 h), that is, the time for heat release is judged according to the low-temperature heating operation time of the air conditioning system. When the air conditioning system is operated in a low-temperature environment for heating, the longer the operation time of the air conditioning system is, the more likely the air conditioning system is to frost, and the greater the possibility of thick frost formation of the air conditioning system is, therefore, whether the heat storage device 2 is controlled to release heat is judged by judging the low-temperature heating operation time of the air conditioning system, and when the heat storage device 2 releases heat, the outdoor heat exchanger can be heated, and the frost layer on the heat exchanger is reduced.
In one embodiment, when it is detected that the temperature of the defrosting bulb is less than a preset temperature, or the low-temperature heating operation time of the air conditioning system is greater than or equal to a first time, it is determined that a first preset defrosting condition is achieved.
In one embodiment, when it is detected that the temperature of the defrosting bulb is less than the preset temperature and the low-temperature heating operation time of the air conditioning system is greater than or equal to the first time, it is determined that the first preset defrosting condition is achieved.
Optionally, when the outdoor ambient temperature is greater than or equal to a first temperature, the first preset defrosting condition is that the temperature of the defrosting bulb is less than a second temperature, and when the outdoor ambient temperature is less than the first temperature, the first preset defrosting condition is that the low-temperature heating operation time of the air conditioning system is greater than or equal to a second preset time.
That is, when the outdoor ambient temperature is greater than or equal to the first temperature and the temperature of the defrosting bulb is less than the second temperature, the first preset defrosting condition is achieved, and when the outdoor ambient temperature is less than the first temperature and the low-temperature heating operation time of the air conditioning system is greater than or equal to the second preset time, the first preset defrosting condition is achieved.
Wherein the first temperature value range is 0-1 ℃. The second temperature value range is-8 ℃ to-18 ℃. The second preset time length is in a value range of 1 h-2 h.
Alternatively, when the outdoor ambient temperature is greater than or equal to the first temperature when determining whether to exit the heat release mode, the condition for exiting the heat release mode is: the temperature of the defrosting bulb is greater than a preset exit temperature, and the value range of the exit temperature is 5-8 ℃; when the outdoor environment temperature is lower than the first temperature, the conditions for exiting the heat release mode are as follows: the heat storage device 2 is turned on to release heat for a period of time greater than or equal to a second period of time, such as 30min, and then exits the heat release mode.
And step S40, controlling the heat storage device 2 to complete heat release, and controlling the air conditioning system to enter a defrosting mode when it is determined that the second preset defrosting condition is achieved.
After the heat storage device 2 is controlled to complete heat release, namely the condition of exiting the heat release mode is met, whether a second preset defrosting condition is achieved or not is judged, and if the second preset defrosting condition is achieved, the air conditioning system is controlled to enter the defrosting mode.
Through the control, the step of heat release of the heat storage device 2 can be set before the defrosting mode is entered, the time of entering the defrosting mode is delayed, the switching times of the four-way reversing valve are reduced, the noise at night is reduced, and the comfort is ensured.
Optionally, the first preset defrosting condition is that the temperature of the defrosting bulb is lower than a third temperature, the second preset defrosting condition is that the temperature of the defrosting bulb is lower than a fourth temperature, and the third temperature is higher than or equal to the fourth temperature.
By setting the third temperature to be greater than or equal to the fourth temperature, the accurate heat release time can be determined, the time for entering the defrosting is delayed on the premise of ensuring timely defrosting and maintaining the reliability of the air conditioner, the switching times of the four-way reversing valve are reduced, and the noise at night is reduced.
Optionally, the first preset defrost condition further comprises: the low-temperature heating operation time period of the air conditioning system after the heat storage device 2 releases heat for the last time is greater than or equal to the third time period. The third time period can be selected to be 6-7 h. When the outdoor temperature is low, for example, below-5 ℃, the ambient air contains less water vapor, the air conditioning unit can form a thinner frost layer within a longer time, and is not easy to enter a defrosting period according to normal defrosting conditions, at the moment, the unit generally performs defrosting judgment according to a certain running time, and the heat storage device 2 is ensured to store enough heat by limiting a long enough low-temperature heating running time.
Optionally, the first preset defrost condition further comprises: the number of times of defrosting of the air conditioning system after the last heat release of the heat storage device 2 is greater than or equal to the preset number of times. The preset times can be selected to be 3-4 times.
Because the invention stores heat in the defrosting mode, the number of times of defrosting is directly related to the heat storage quantity of the heat storage device 2, and the heat storage device 2 can store enough heat for heating the outdoor heat exchanger by limiting the limit of enough defrosting times.
Optionally, step S10 is followed by:
step S50, when the sleep anti-interference condition of the user is not achieved, obtaining a second parameter, and judging whether a preset condition is achieved or not based on the second parameter, wherein the preset condition comprises that the air conditioning system is in a defrosting mode; and when the preset condition is judged to be achieved, controlling the heat storage device 2 to store heat.
Whether the preset condition is achieved is judged based on a second parameter, wherein the second parameter comprises all parameters related to the preset condition, for example, if the preset condition comprises that the air-conditioning system is in a defrosting mode, the second parameter comprises an identification bit for identifying the mode of the air-conditioning system.
Optionally, the preset conditions further include: the temperature of the defrosting bulb is greater than or equal to a preset temperature, the temperature rise change rate is greater than or equal to a preset value, and optionally, the value range of the preset temperature is 0-1 ℃. At this time, the first parameter includes a defrosting bulb temperature.
The defrosting temperature sensing bulb is arranged on the outdoor heat exchanger, particularly can be arranged on a fin of the outdoor heat exchanger, and the detected temperature is used for defrosting judgment.
After the defrosting starting condition is met and the defrosting mode is entered, heating is switched to refrigeration, a high-temperature refrigerant flows through the outdoor heat exchanger, the temperature of the outdoor heat exchanger rises, frost crystals of the outdoor heat exchanger slowly melt, the temperature detected by the defrosting temperature sensing bulb rises from the subzero temperature until the temperature rises to about 0 ℃, pure ice on the outdoor heat exchanger is changed into an ice-water mixture at the moment, the temperature is kept unchanged for a period of time at about 0 ℃, then, the temperature rises sharply with the change of the ice-water mixture into pure water, the temperature rise amplitude increases in a short time, frost is basically finished at the moment, but in practical application, in order to ensure better defrosting effect, the temperature at which the air conditioner exits defrosting is generally higher (for example, the temperature of a defrosting temperature sensing bulb is more than 10 ℃ in 1min continuously or the temperature of a defrosting temperature sensing bulb is more than 12 ℃ in 30s continuously), at the moment, the heat brought by the high-temperature refrigerant is more than the heat required for defrosting, waste of excess heat may result.
Based on the method, the surplus heat in the defrosting process is stored and used in other scenes needing heat, for example, when the temperature of the outdoor heat exchanger is too low, the outdoor heat exchanger is heated, so that the time of entering the defrosting mode is delayed, meanwhile, the surplus heat in the defrosting mode is fully utilized, and the heat waste is avoided. In the present invention, the storage and release of this portion of excess heat is achieved by the thermal storage device 2.
And determining the time point for absorbing the waste heat according to the temperature of the defrosting bulb and the change condition (amplitude change rate) of the temperature bulb along with the time, and judging to start heat storage when the temperature of the defrosting bulb is greater than or equal to the preset temperature and the temperature rise change rate is greater than or equal to the preset value.
Wherein the preset value can be selected to be 3-5 ℃.
Optionally, the preset conditions further include: in a first period of a preset time period, the temperature rise amplitude of the defrosting bulb is smaller than a first preset amplitude, and in a second period of the preset time period, the temperature rise amplitude of the defrosting bulb is larger than or equal to a second preset amplitude, wherein the preset time period is composed of the first period and the second period, and the first period is before the second period.
The preset time period refers to a time period, for example, 1 minute or 2 minutes, and does not limit which specific time the starting point is, and the preset time period may start from any time and end from any time.
The first time period/the second time period refers to a time length in the preset time period, the first time period and the second time period are combined to form the preset time period, wherein the first time period can be selected to be the first 30s in 1 minute, the second time period can be selected to be the last 30s in 1 minute, the value range of the first preset amplitude is (0 ℃,1 ℃), and the second preset amplitude is greater than or equal to 2 ℃.
In the first time period of the preset time period, the temperature of the defrosting temperature sensing bulb fluctuates or does not change in a certain range, the change range is very small, in the second time period of the preset time period, the temperature of the defrosting temperature sensing bulb rises sharply, and based on the temperature change phenomenon, the time point for starting heat storage is determined, so that after actual defrosting is basically completed, a part of high-temperature refrigerant is separated to be used for providing a heat source for the heat storage device 2, at the moment, the heat required by defrosting is not much, the amount of the refrigerant entering the refrigerant pipeline of the heat storage device 2 is also small, the better defrosting effect is not influenced, meanwhile, the redundant heat in the defrosting mode can be fully utilized, and the heat waste is avoided.
Optionally, the preset condition further includes: the defrosting accumulated time is greater than or equal to a first preset time.
The defrosting accumulated time is greater than or equal to a first preset time, wherein the defrosting accumulated time can be recorded by detecting a reversing signal of a four-way reversing valve for heating to refrigerating. The preset time can be selected to be 7-8 min. Usually, after defrosting for a period of time, most of the frost layer is melted, at this time, the heat storage mode can be started for heat storage, so that by counting the defrosting time, when the defrosting accumulation time is greater than or equal to the first preset time length, the heat storage is judged to be started, the judgment mode is simple, the operation resources can be saved, and the heat storage time point can be judged, so as to avoid the adverse effect of the heat storage mode on normal defrosting.
When a signal that the air conditioning system exits the defrosting mode, for example, a four-way reversing valve reversing signal for cooling to heating, is detected, the first switch 22 and the second switch 23 are closed, the heat storage mode is exited, and the normal heating mode is started.
For ease of understanding, an embodiment as shown in FIG. 3 is provided.
After the air conditioner is started to heat, judging whether the current time is in the daytime by judging whether the current time is 8: 00-22: 00; if yes, judging whether a defrosting four-way valve action signal (four-way valve reversing action during heating to refrigeration) is detected;
if a defrosting four-way valve action signal is detected, recording the temperature of a defrosting temperature sensing bulb, accumulating the defrosting time, and judging whether a heat storage condition is met or not based on the temperature of the defrosting temperature sensing bulb and the defrosting time, wherein the heat storage condition can be that the temperature of the defrosting temperature sensing bulb is smaller than a certain value and/or the defrosting time is larger than a certain value;
when the heat storage condition is met, the first switch 22 and the second switch 23 are turned on to store heat;
when a four-way valve action signal (four-way valve reversing action during refrigeration to heating) of defrosting completion is detected, the first switch 22 and the second switch 23 are closed, and heat storage is closed;
if the current time is not 8: 00-22: 00, acquiring the temperature of the defrosting bulb, judging whether the heating starting condition is met, if so, controlling the heat storage device 2 to heat, if not, continuously acquiring the temperature of the defrosting bulb, and judging whether the heating starting condition is met;
after the heat storage device 2 heats, judging whether a heating exit condition is met, if so, exiting heating, acquiring the temperature of the defrosting temperature sensing bulb again, and judging whether a heating start condition is met; if the heat generation exit condition is not satisfied, the heat storage device 2 is controlled to continue generating heat.
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 (11)
1. The control method of the air conditioning system is characterized by being applied to the air conditioning system, the air conditioning system comprises an outdoor heat exchanger (1) and a heat storage device (2), the heat storage device (2) comprises a refrigerant pipeline and a heat storage medium pipeline, the refrigerant pipeline is connected with the outdoor heat exchanger (1) in parallel, the heat storage medium pipeline comprises a heat exchange box (21) provided with a heat storage medium, and the refrigerant pipeline penetrates through the heat exchange box (21) to exchange heat, and the control method of the air conditioning system comprises the following steps:
after the air conditioning system is started in a heating mode, judging whether a sleep anti-interference condition of a user is achieved;
when the sleep anti-interference condition of the user is achieved, acquiring a first parameter, and judging whether a first preset defrosting condition is achieved or not based on the first parameter;
when the first preset defrosting condition is achieved, controlling the heat storage device (2) to release heat;
and controlling the heat storage device (2) to finish heat release, and controlling the air conditioning system to enter a defrosting mode when judging that a second preset defrosting condition is achieved.
2. The method as claimed in claim 1, wherein the step of determining whether the sleep disturbance prevention condition is satisfied after the heating of the air conditioning system is started comprises:
when the sleep anti-interference condition of the user is not achieved, acquiring a second parameter, and judging whether a preset condition is achieved or not based on the second parameter, wherein the preset condition comprises that the air-conditioning system is in a defrosting mode; and when the preset condition is judged to be achieved, controlling the heat storage device (2) to store heat.
3. The control method of an air conditioning system as set forth in claim 2, wherein the preset condition further includes: the temperature of the defrosting bulb is greater than or equal to the preset temperature, and the temperature rise change rate is greater than or equal to the preset value.
4. The control method of an air conditioning system as set forth in claim 2, wherein the preset condition further includes: in a first period of a preset time period, the temperature rise amplitude of the defrosting bulb is smaller than a first preset amplitude, and in a second period of the preset time period, the temperature rise amplitude of the defrosting bulb is larger than or equal to a second preset amplitude, wherein the preset time period consists of the first period and the second period, and the first period is before the second period.
5. The control method of an air conditioning system as set forth in claim 2, wherein the preset condition further includes: the defrosting accumulated time is greater than or equal to a first preset time.
6. The control method of an air conditioning system according to claim 1, wherein the first preset defrosting condition is that a defrosting bulb temperature is less than a second temperature when an outdoor environment temperature is greater than or equal to a first temperature, and the first preset defrosting condition is that a low-temperature heating operation time period of the air conditioning system is greater than or equal to a second preset time period when the outdoor environment temperature is less than the first temperature.
7. The control method of an air conditioning system according to claim 1, wherein the first preset defrost condition is a defrost bulb temperature being less than a third temperature, the second preset defrost condition is the defrost bulb temperature being less than a fourth temperature, and the third temperature being greater than or equal to the fourth temperature.
8. The control method of an air conditioning system according to any one of claims 1 to 7, wherein the user sleep-preventing condition includes at least one of:
the current time belongs to a time period corresponding to night, the outdoor light intensity is smaller than the preset illumination intensity, the indoor noise intensity is smaller than the preset sound intensity, and users in a sleeping state exist indoors.
9. The control method of an air conditioning system according to any one of claims 1 to 7, characterized in that the heat storage medium piping further includes a heat release section piping disposed adjacent to the outdoor heat exchanger (1).
10. The control method of an air conditioning system as set forth in claim 9, characterized in that said heat storage medium line further includes a pump for pumping said heat storage medium from said heat exchange tank (21) into said heat releasing section line when said heat storage device (2) releases heat.
11. The method as claimed in any one of claims 1 to 7, wherein the refrigerant pipeline further includes a first switch (22) and a second switch (23), the first switch (22) and the second switch (23) are respectively disposed on two sides of the heat exchange box (21), and the first switch (22) and the second switch (23) are configured to conduct the refrigerant pipeline when the heat storage device (2) stores heat so that a high-temperature refrigerant sent by the compressor (4) during refrigeration of the air conditioning system flows through the refrigerant pipeline.
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| CN113819514B (en) * | 2021-09-15 | 2023-06-23 | 青岛海尔空调器有限总公司 | Air conditioning system and control method thereof |
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| JP2014013121A (en) * | 2012-07-05 | 2014-01-23 | Panasonic Corp | Air conditioner |
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| JP2017155961A (en) * | 2016-02-29 | 2017-09-07 | シャープ株式会社 | Heat pump device and air conditioner |
| JP2018151082A (en) * | 2017-03-10 | 2018-09-27 | パナソニックＩｐマネジメント株式会社 | Air conditioner |
| CN111256290A (en) * | 2020-01-20 | 2020-06-09 | 珠海格力电器股份有限公司 | Heat pump air conditioner |
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| JP2014013121A (en) * | 2012-07-05 | 2014-01-23 | Panasonic Corp | Air conditioner |
| JP2017155961A (en) * | 2016-02-29 | 2017-09-07 | シャープ株式会社 | Heat pump device and air conditioner |
| CN106705302A (en) * | 2017-01-10 | 2017-05-24 | 美的集团武汉制冷设备有限公司 | Air conditioner, defrosting control method and defrosting control system |
| JP2018151082A (en) * | 2017-03-10 | 2018-09-27 | パナソニックＩｐマネジメント株式会社 | Air conditioner |
| CN111256290A (en) * | 2020-01-20 | 2020-06-09 | 珠海格力电器股份有限公司 | Heat pump air conditioner |
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Effective date of registration: 20221013 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. |