CN111578389B - Outer machine heat exchanger, high-temperature-prevention control device and control method and air conditioner - Google Patents
Outer machine heat exchanger, high-temperature-prevention control device and control method and air conditioner Download PDFInfo
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- CN111578389B CN111578389B CN202010386355.4A CN202010386355A CN111578389B CN 111578389 B CN111578389 B CN 111578389B CN 202010386355 A CN202010386355 A CN 202010386355A CN 111578389 B CN111578389 B CN 111578389B
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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
- 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
- F24F1/46—Component arrangements in separate outdoor units
- F24F1/48—Component arrangements in separate outdoor units characterised by air airflow, e.g. inlet or outlet airflow
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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
- F24F11/32—Responding to malfunctions or emergencies
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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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
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- Fuzzy Systems (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The invention provides an external machine heat exchanger, a high-temperature prevention control device, a control method and an air conditioner, and relates to the technical field of air conditioners, wherein the external machine heat exchanger at least comprises a first heat exchange area, a second heat exchange area, a heat exchanger inlet pipe, a first shunt pipe and a second shunt pipe; the two ends of the first shunt pipe are respectively connected with the heat exchanger inlet pipe and the inlet pipe opening of the first heat exchange area, the two ends of the second shunt pipe are respectively connected with the heat exchanger inlet pipe and the second heat exchange area, and the outer machine heat exchanger further comprises a throttling device which is suitable for throttling the refrigerant entering the first heat exchange area through the first shunt pipe. According to the invention, the heat exchanger of the external unit is divided into two parts, and a throttling device is used for throttling one part of the heat exchanger, so that the heat exchange effect of the heat exchanger is adjusted, and the problems of poor heating effect and the like caused by indoor temperature fluctuation due to severe fluctuation of unit load are avoided; and the problem of pressure protection or compressor built-in overload protection caused by high-temperature failure is solved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an external unit heat exchanger, a high-temperature prevention control device, a control method and an air conditioner.
Background
The air conditioner has a heating function, however, when the external environment temperature is high, the heating causes the exhaust pressure and the exhaust temperature of the compressor to be too high, and at this time, load reduction processing needs to be performed on the air conditioning system to reduce the exhaust pressure and the exhaust temperature of the compressor, so that the air conditioner unit operates normally, and the reliability of the unit is ensured.
In the prior art, in order to solve the problem of overhigh exhaust pressure and exhaust temperature, the temperature of the indoor pipe temperature is detected during heating, and when the temperature of the indoor pipe temperature is higher, the air conditioner unit enters a high-temperature prevention protection mode and an outer fan is turned off; along with the closing of the outer fan, the temperature of the indoor pipe temperature is reduced, the unit exits from the high-temperature protection mode, and the outer fan is started. And when the temperature of the indoor pipe temperature is higher than the dangerous temperature, the air conditioner unit is stopped for protection.
In the high-temperature prevention process, after the outer fan is restarted, the heat exchange effect is improved, the exhaust temperature and the exhaust pressure are quickly increased, so that the outer fan enters the high-temperature prevention protection mode again, and the outer fan is frequently started and stopped, so that the indoor outlet air temperature and the indoor working condition are fluctuated, and the heating effect is influenced; in addition, after the outer fan is closed, the heat exchange effect cannot be rapidly reduced, even when the external environment temperature is high, high-temperature failure can be prevented under the condition of natural wind, and the air conditioner is stopped due to starting pressure protection or compressor built-in overload protection.
Disclosure of Invention
The invention solves the problems that in the existing high-temperature-resistant control process, an external fan is frequently started and stopped, so that the indoor air-out temperature and the indoor working condition fluctuate, and the heating effect is influenced; and may activate pressure protection or compressor built-in overload protection, causing the air conditioner to shut down.
In order to solve the above problems, the present invention provides an external machine heat exchanger, which at least comprises a first heat exchange area and a second heat exchange area, and further comprises a heat exchanger inlet pipe, a first shunt pipe and a second shunt pipe;
the two ends of the first shunt tube are respectively connected with the heat exchanger inlet tube and the inlet tube opening of the first heat exchange area, the two ends of the second shunt tube are respectively connected with the heat exchanger inlet tube and the second heat exchange area, and the external machine heat exchanger shunts the refrigerant flowing in from the heat exchanger inlet tube into the first heat exchange area and the second heat exchange area through the first shunt tube and the second shunt tube;
the outdoor unit heat exchanger further comprises a throttling device, the throttling device is arranged on the first flow dividing pipe, and the throttling device is suitable for throttling the refrigerant entering the first heat exchange area through the first flow dividing pipe.
According to the external machine heat exchanger, the external machine heat exchanger is divided into two parts, and one part of the heat exchanger is throttled by the throttling device so as to adjust the heat exchange effect of the heat exchanger, so that the problems of poor heating effect and the like caused by the fluctuation of indoor temperature due to the severe fluctuation of the load of a unit only by starting and stopping the external fan are avoided; and the problem of pressure protection or compressor built-in overload protection caused by high-temperature failure is solved, the heating stability of the air conditioner is ensured, and the service life of the air conditioner is prolonged.
Optionally, the first shunt pipe and the second shunt pipe are connected with the heat exchanger inlet pipe through a tee pipe. The shunting of the first heat exchange area and the second heat exchange area is simply realized.
Optionally, the throttling device includes an electromagnetic valve, and can throttle the refrigerant in the first heat exchange area in combination with the control process of the control unit.
Another object of the present invention is to provide a high temperature protection control method for controlling a high temperature protection of an air conditioner, in which an outdoor unit of the air conditioner includes the outdoor unit heat exchanger, the method including:
when the air conditioner runs in a heating mode, the temperature T of the coil pipe of the indoor unit is obtainedInner partWhen said coil temperature TInner partGreater than or equal to the first preset temperature T1In the meantime, the first heat transfer zone 1 is throttled.
According to the high-temperature prevention control method, whether the air conditioner is overheated or not is effectively judged according to the temperature of the inner disc, and when the high-temperature prevention control is needed, the first heat exchange area is throttled, so that the problems of poor heating effect and the like caused by the fact that the load of a unit fluctuates severely due to the fact that an outer fan is turned on and off are effectively avoided; and the problem of pressure protection or compressor built-in overload protection caused by high-temperature failure is solved, the heating stability of the air conditioner is ensured, and the service life of the air conditioner is prolonged.
Optionally, after throttling the first heat exchange area, the method further includes:
continuously acquiring the temperature T of the coilInner partWhen said coil temperature TInner partGreater than or equal to the second preset temperature T2If so, the outer fan is closed;
when the temperature T of the coilInner partLess than the second preset temperature T2Then, the temperature T of the coil pipe is continuously judgedInner partWhether or not it is less than or equal to the fifth preset temperature T5If said coil temperature TInner partLess than or equal to the fifth preset temperature T5And then the control of throttling the first heat exchange area is quitted.
The temperature of the inner pipe is compared with a second preset temperature, and the outer fan is turned off when the temperature of the inner pipe is continuously increased, so that the heat exchange efficiency of the heat exchanger is further reduced, and the high-temperature prevention control is performed to a greater extent; and through the comparison of the inner pipe temperature and the fifth preset temperature, the quitting condition of quitting the high-temperature-prevention control is provided, and the heating effect of the air conditioner is recovered in time.
Optionally, after the outer blower is turned off, the method further includes:
reacquiring said coil temperature TInner partWhen said coil temperature TInner partGreater than or equal to the third preset temperature T3If so, turning off the air conditioner;
when the temperature T of the coilInner partLess than the third preset temperature T3Then, the temperature T of the coil pipe is continuously judgedInner partWhether or not it is less than or equal to the fourth preset temperature T4If said coil temperature TInner partLess than or equal to the fourth preset temperature T4And then the outer fan is started.
By comparing the temperature of the inner pipe with the third preset temperature, when the outer fan is turned off and the temperature of the inner pipe is increased to a larger temperature, the air conditioner is turned off for shutdown protection, so that the air conditioner is effectively prevented from being damaged due to high temperature; and through the contrast of inner tube temperature and fourth preset temperature, judge when outer fan opens, obtain only through can preventing the condition of high temperature control to first heat transfer district throttle for control is more meticulous, and the air conditioner heats and obtains furthest's assurance.
Optionally, when the air conditioner has a plurality of external fans and the first heat exchange area has corresponding external fans, if the coil temperature T isInner partGreater than or equal to the first preset temperature T1And throttling the first heat exchange area, and closing the outer fan corresponding to the first heat exchange area.
Another object of the present invention is to provide a high temperature prevention control apparatus for implementing any one of the above high temperature prevention control methods, including:
a detection unit for detecting the temperature T of the coil pipe of the indoor unit of the air conditionerInner part；
A control unit for judging the temperature T of the coilInner partWhether it is greater than or equal to the first preset temperature T1If said coil temperature TInner partGreater than or equal to the first preset temperature T1Then the first heat exchange zone is throttled.
Another object of the present invention is to provide a computer-readable storage medium, which stores a computer program, and when the computer program is read and executed by a processor, the computer program implements the high temperature prevention control method according to any one of the above.
Another object of the present invention is to provide an air conditioner, which includes a computer readable storage medium storing a computer program and a processor, and further includes the outdoor unit heat exchanger described above, where the computer program is read and executed by the processor to implement the high temperature protection control method described above.
Compared with the prior art, the beneficial effects of the high-temperature prevention control device and the air conditioner are the same as the beneficial effects of the external unit heat exchanger and the high-temperature prevention control method compared with the prior art, and are not repeated herein.
Drawings
Fig. 1 is a schematic view of an external unit heat exchanger according to an embodiment of the present invention;
FIG. 2 is a first schematic diagram illustrating a high temperature control method for an air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a second method for controlling high temperature resistance of an air conditioner according to an embodiment of the present invention.
Description of reference numerals:
1-a first heat exchange zone, 2-a second heat exchange zone, 3-a heat exchanger inlet pipe, 4-a first shunt pipe, 5-a second shunt pipe, 6-a throttling device, 7-a three-way valve, 8-a heat exchanger outlet pipe, 9-a liquid separation capillary pipe and 10-a shunt body.
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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
Referring to fig. 1, the heat exchanger for an external unit of an air conditioner according to the present embodiment includes: the first heat exchange area 1 and the second heat exchange area 2, and the outer machine heat exchanger is formed by connecting a plurality of copper pipes through U-shaped pipes and bending the copper pipes in a reciprocating manner. In the prior art, the external machine heat exchanger is an integral heat exchanger, that is, the heat exchanger performs heat exchange integrally, in this embodiment, an existing integral external machine heat exchanger is split into two independent heat exchange areas, the first heat exchange area 1 and the second heat exchange area 2 can be selected by control to perform heat exchange simultaneously, and the first heat exchange area 1 or the second heat exchange area 2 can also be selected independently to perform heat exchange.
Specifically, when the external heat exchanger is split, the first heat exchange area 1 and the second heat exchange area 2 can be equally split, that is, the heat exchange efficiency of the first heat exchange area 1 and the heat exchange efficiency of the second heat exchange area 2 are both 50%; preferably, the heat exchange efficiency of the first heat exchange zone 1 and the second heat exchange zone 2 can be selected from 30 to 70% by reasonable design according to the actual condition of the air conditioner, for example, the heat exchange efficiency of the first heat exchange zone 1 is controlled to be 45%, and the heat exchange efficiency of the second heat exchange zone 2 is controlled to be 55%. It should be noted that the heat exchange efficiency of the heat exchange zone can be controlled by the heat exchange areas of different heat exchange zones.
As shown in fig. 1, the outdoor unit heat exchanger further includes a heat exchanger inlet pipe 3, a first shunt pipe 4 and a second shunt pipe 5, wherein a refrigerant flowing into the heat exchanger inlet pipe 3 is shunted by the first shunt pipe 4 and the second shunt pipe 5 and enters the first heat exchange area 1 and the second heat exchange area 2; specifically, two ends of the first shunt tube 4 are respectively connected with the heat exchanger inlet tube 3 and the inlet tube mouth of the first heat exchange area 1, and two ends of the second shunt tube 5 are respectively connected with the heat exchanger inlet tube 3 and the inlet tube mouth of the second heat exchange area 2.
Specifically, as shown in fig. 1, the first shunt tube 4 and the second shunt tube 5 are connected to the heat exchanger inlet tube 3 through a three-way pipe 7, and the refrigerant in the heat exchanger inlet tube 3 is shunted to enter the first shunt tube 4 and the second shunt tube 5.
As shown in fig. 1, the external machine heat exchanger further includes a throttling device 6, the throttling device 6 is disposed on the first branch pipe 4, and the throttling device 6 is used for throttling the refrigerant entering the first heat exchange zone 1 from the first branch pipe 4; specifically, the first heat exchange zone 1 is provided with a plurality of inlet pipe openings, the first shunt pipe 4 is connected with the inlet pipe openings, and the throttling device 6 is arranged between the inlet pipe opening closest to the three-way pipe 7 and the three-way pipe 7, so that the throttling device 6 can throttle the refrigerant in the first heat exchange zone 1.
It should be noted that the throttling of the present invention includes flow interception, that is, the flow rate of the refrigerant in the first heat exchange zone 1 is controlled to be zero.
Specifically, as shown in fig. 1, the external unit heat exchanger further includes a plurality of heat exchanger outlet pipes 8, liquid separating capillaries 9, and a branch body 10, where the plurality of heat exchanger outlet pipes 8 are connected to the plurality of liquid separating capillaries 9 in a matching manner, and the plurality of liquid separating capillaries 9 are collected to the branch body 10, so that the heat exchanger refrigerant flows out.
Preferably, the throttling device 6 described in this embodiment is an electromagnetic valve, and can throttle the refrigerant in the first heat exchange zone 1 in combination with the control process of the control unit.
The outer machine heat exchanger is divided into two parts, and one part of the heat exchanger is throttled by the throttling device to adjust the heat exchange effect of the heat exchanger, so that the problems of poor heating effect and the like caused by the severe fluctuation of the load of a unit only by starting and stopping an outer fan and the fluctuation of the indoor temperature are avoided; and the problem of pressure protection or compressor built-in overload protection caused by high-temperature failure is solved, the heating stability of the air conditioner is ensured, and the service life of the air conditioner is prolonged.
On the basis of the foregoing embodiments, this embodiment further provides a high temperature prevention control method for an air conditioner, configured to perform high temperature prevention control on the air conditioner, where an outdoor unit of the air conditioner includes the above-mentioned outdoor unit heat exchanger, and as shown in fig. 2, the method includes the following steps:
step S1, the air conditioner is started and operated according to the heating mode;
step S2, obtaining the temperature T of the coil pipe of the indoor unit of the air conditionerInner partJudging the temperature T of the coilInner partWhether it is greater than or equal to the first preset temperature T1If said coil temperature TInner partGreater than or equal to a first preset temperature T1If the temperature of the air conditioner is high, high temperature prevention control is needed, and the first heat exchange area 1 is throttled; if the coil temperature TInner partLess than a first predetermined temperature T1Then returning to obtain the temperature T of the coil pipe of the air conditioner internal unit again after a certain timeInner partAnd then again to coil temperature TInner partAnd a first predetermined temperature T1Carrying out comparison;
in this embodiment, the first predetermined temperature T1In the range of 52 to 57 ℃;
step S3, when the first heat exchange zone 1 is throttled, the temperature T of the coil pipe is continuously obtainedInner partAnd judging the temperature T of the coil pipeInner partWhether it is greater than or equal to a second preset temperature T2If said coil temperature TInner partGreater than or equal to the second preset temperature T2If so, the outer fan is closed; if the coil temperature TInner partLess than the second preset temperature T2Then, the temperature T of the coil pipe is continuously judgedInner partWhether or not it is less than or equal to the fifth preset temperature T5If said coil temperature TInner partLess than or equal to the fifth preset temperature T5If yes, quitting the throttling control of the first heat exchange area 1; if the coil temperature TInner partIs greater than the fifth preset temperature T5Then return to reacquire said coil temperature TInner partAnd judging again until exiting the throttling control of the first heat exchange area 1.
In this embodiment, the second predetermined temperature T2In the range of 55 to 60 ℃, a fifth preset temperature T5In the range of 48 to 53 ℃.
In the outdoor unit heat exchanger according to the above embodiment, the throttling of the first heat exchange zone 1 may be controlled by opening a throttling device 6, for example, an electromagnetic valve, and controlling the opening degree of the electromagnetic valve to throttle the refrigerant in the first heat exchange zone 1. Preferably, the opening degree of the electromagnetic valve is adjusted, so that the refrigerant flow of the first heat exchange area 1 is adjusted.
Specifically, referring to fig. 3, the method for controlling high temperature according to this embodiment further includes the following steps:
step S4, after the outer fan is turned off, the coil temperature T is obtained againInner partAnd judging the temperature T of the coil pipeInner partWhether it is greater than or equal to the third preset temperature T3If said coil temperature TInner partGreater than or equal to the third preset temperature T3If yes, the air conditioner is closed; if the coil temperature TInner partLess than the third preset temperature T3Then, the temperature T of the coil pipe is continuously judgedInner partWhether or not it is less than or equal to the fourth preset temperature T4If said coil temperature TInner partLess than or equal to the fourth preset temperature T4Then the outer fan is started; if the coil temperature TInner partIs greater than the fourth preset temperature T4Waiting for a period of time and then reacquiring said coil temperature TInner partThe judgment in the step S4 is carried out again until the air conditioner is closed or the external fan is started;
specifically, after the external fan is turned on, the coil temperature T is acquired againInner partAnd judging the temperature T of the coil pipeInner partWhether or not T is less than or equal to5If said coil temperature TInner partLess than or equal to the fifth preset temperature T5If yes, quitting the throttling control of the first heat exchange area 1; if the coil temperature TInner partIs greater than the fifth preset temperature T5Waiting for a period of time and then reacquiring said coil temperature TInner partAnd for the indoor coil temperature TInner partAnd a fifth predetermined temperature T5And judging until the throttling control of the first heat exchange area 1 is quitted.
In this embodiment, the third predetermined temperature T3In the range of 57 to 62 ℃, a fourth preset temperature T4In the range of 54 to 58 ℃ and a fifth preset temperature T5In the range of 48 to 53 ℃.
Preferably, for the case that the outdoor unit of the air conditioner has a plurality of external fans, for example, two external fans are provided, and when one of the two external fans corresponds to the first heat exchanging region 1 (i.e. one of the external fans performs blowing heat dissipation on the first heat exchanging region 1), if the determination result in the step S2 is the coil temperature TInner partGreater than or equal to a first preset temperature T1And throttling the first heat exchange area 1, and closing the external fans corresponding to the first heat exchange area 1 to prevent the heat exchange efficiency of the second heat exchange area 2 from being reduced due to the closing of all the external fans.
Preferably, on the basis of the foregoing embodiments, the present embodiment further provides a high temperature control preventing device for an air conditioner, which is used to implement the high temperature control preventing method according to any of the foregoing embodiments, and includes:
a detection unit for detecting the temperature T of the coil pipe of the indoor unit of the air conditionerInner part；
A control unit for judging the temperature T of the coilInner partWhether it is greater than or equal to the first preset temperature T1If said coil temperature TInner partGreater than or equal to the first preset temperature T1The first heat transfer zone 1 is throttled.
Specifically, the detection unit is an inner pipe temperature sensing bulb of the existing air conditioner, the inner disc temperature is monitored in real time through the inner pipe temperature sensing bulb, and the inner disc temperature is transmitted to the control unit.
The control unit is a controller of the existing air conditioner, the controller is a computer readable storage medium, the computer readable storage medium stores a computer program, and the computer program is read by the processor and runs to realize a control method to be run by the control unit.
Preferably, in addition to the above embodiments, the present embodiment further provides an air conditioner, which includes the external unit heat exchanger including the first heat transfer zone 1 and the second heat transfer zone 2 described in the above embodiments, and further includes the high temperature control preventing device of the air conditioner described in the above embodiments.
The air conditioner comprises a computer readable storage medium and a processor, wherein a computer program is stored in the computer readable storage medium, and when the computer program is read and executed by the processor, the high temperature prevention control method is realized.
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 (10)
1. An outdoor unit heat exchanger is characterized by at least comprising a first heat exchange area (1), a second heat exchange area (2), a heat exchanger inlet pipe (3), a first shunt pipe (4) and a second shunt pipe (5);
the two ends of the first shunt tube (4) are respectively connected with the heat exchanger inlet tube (3) and the inlet tube mouth of the first heat exchange area (1), the two ends of the second shunt tube (5) are respectively connected with the heat exchanger inlet tube (3) and the second heat exchange area (2), and the external machine heat exchanger shunts the refrigerant flowing in from the heat exchanger inlet tube (3) into the first heat exchange area (1) and the second heat exchange area (2) through the first shunt tube (4) and the second shunt tube (5);
the outdoor unit heat exchanger further comprises a throttling device (6), the throttling device (6) is arranged on the first shunt pipe (4), and the throttling device (6) is suitable for throttling the refrigerant entering the first heat exchange area (1) from the first shunt pipe (4);
a detection unit for detecting the temperature T of the coil pipe of the indoor unit of the air conditionerInner part；
A control unit for judging the temperature T of the coilInner partWhether it is greater than or equal to the first preset temperature T1If said coil temperature TInner partGreater than or equal to the first preset temperature T1The first heat transfer zone (1) is throttled.
2. The outdoor unit heat exchanger according to claim 1, wherein the first shunt tube (4) and the second shunt tube (5) are connected to the heat exchanger inlet tube (3) by a tee (7).
3. The outdoor unit heat exchanger according to claim 1, characterized in that the throttling means (6) comprises a solenoid valve.
4. A high temperature prevention control method for controlling a high temperature of an air conditioner, an outdoor unit of the air conditioner including the outdoor unit heat exchanger according to any one of claims 1 to 3, comprising:
when the air conditioner runs in a heating mode, the temperature T of the coil pipe of the indoor unit is obtainedInner partWhen said coil temperature TInner partGreater than or equal to a first preset temperature T1And in the meantime, the first heat exchange zone (1) is throttled.
5. The high temperature prevention control method according to claim 4, wherein after throttling the first heat transfer zone (1), further comprising:
continuously acquiring the temperature T of the coilInner partWhen said coil temperature TInner partGreater than or equal to a second preset temperature T2When the fan is started, the outer fan is turned off;
when the temperature T of the coilInner partLess than the second preset temperature T2Then, the temperature T of the coil pipe is continuously judgedInner partWhether or not it is less than or equal to the fifth preset temperature T5If said coil temperature TInner partLess than or equal to the fifth preset temperature T5And quitting the control of throttling the first heat exchange area (1).
6. The high temperature prevention control method of claim 5, further comprising, after turning off the external fan:
reacquiring said coil temperature TInner partWhen said coil temperature TInner partGreater than or equal to a third preset temperature T3If so, turning off the air conditioner;
when the temperature T of the coilInner partLess than the third preset temperature T3Then, the temperature T of the coil pipe is continuously judgedInner partWhether or not it is less than or equal to the fourth preset temperature T4If said coil temperature TInner partLess than or equal to the fourth preset temperature T4And then the outer fan is started.
7. The high temperature prevention control method according to claim 4, wherein if the coil temperature T is higher when the air conditioner has a plurality of external fans and the first heat exchange area (1) has corresponding external fansInner partGreater than or equal to the first preset temperature T1And throttling the first heat exchange area (1) and closing the outer fan corresponding to the first heat exchange area (1).
8. A high temperature prevention control apparatus for controlling a high temperature of an air conditioner, an outdoor unit of the air conditioner including the outdoor unit heat exchanger according to any one of claims 1 to 3, comprising:
a detection unit for detecting the temperature T of the coil pipe of the indoor unit of the air conditionerInner part；
A control unit for judging the temperature T of the coilInner partWhether or not it is greater than or equal toA first preset temperature T1If said coil temperature TInner partGreater than or equal to the first preset temperature T1The first heat transfer zone (1) is throttled.
9. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the high temperature prevention control method according to any one of claims 4 to 7.
10. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, and further comprising the outdoor unit heat exchanger according to any one of claims 1 to 3, wherein the computer program is read and executed by the processor to implement the high temperature prevention control method according to any one of claims 4 to 7.
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| CN112283873B (en) * | 2020-10-26 | 2022-04-22 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method, air conditioner and storage medium |
| CN114517973B (en) * | 2022-02-28 | 2023-11-21 | 青岛海尔空调器有限总公司 | Control method, control system, electronic equipment and storage medium for air conditioner split flow |
| CN115289604B (en) * | 2022-08-12 | 2024-07-23 | 珠海格力电器股份有限公司 | Heating overload protection method and device and air conditioner |
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Effective date of registration: 20221018 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. |