CN109297134B - Overload protection method and device for air conditioner, storage medium and air conditioner - Google Patents
Overload protection method and device for air conditioner, storage medium and air conditioner Download PDFInfo
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- CN109297134B CN109297134B CN201810995089.8A CN201810995089A CN109297134B CN 109297134 B CN109297134 B CN 109297134B CN 201810995089 A CN201810995089 A CN 201810995089A CN 109297134 B CN109297134 B CN 109297134B
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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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Abstract
The invention discloses an overload protection method and device of an air conditioner, a storage medium and the air conditioner, wherein the method comprises the following steps: acquiring the current of the whole air conditioner and the current exhaust temperature of a compressor; determining whether the current is greater than or equal to a set current upper limit value or whether the current exhaust temperature is greater than or equal to a set temperature upper limit value; and if the current is smaller than the set current upper limit value and the current exhaust temperature is smaller than the set temperature upper limit value, realizing overload protection of the air conditioner according to the reference exhaust temperature corresponding to the current. The scheme of the invention can solve the problem that the control precision is low because the fixed-frequency air-conditioning compressor in the prior art needs to be provided with the built-in overload protector or the external overload protector for overload protection, and achieves the effect of improving the control precision.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to an overload protection method, an overload protection device, a storage medium and an air conditioner, in particular to an air conditioner overload protection control method, a device corresponding to the method, an air conditioner with the device, a computer readable storage medium storing instructions corresponding to the method, and an air conditioner capable of executing the instructions corresponding to the method.
Background
The constant-frequency air-conditioning compressor on the market at present needs to be provided with an internal overload protector (for example, a mechanical overload protector arranged on the top outside the compressor) or an external overload protector (for example, the external overload protector is arranged on the top inside the compressor and close to a glass body), the principle is that the safety problem caused by overlarge current or overhigh temperature is avoided through the combined action of the current and the temperature, the constant-frequency air-conditioning compressor belongs to a mechanical control mode, the control precision is low, the reliability and the safety are not guaranteed, in addition, the installation structure is complex, and the hardware cost is high.
Disclosure of Invention
The invention aims to provide an overload protection method and device of an air conditioner, a storage medium and the air conditioner aiming at the defects, so as to solve the problem that the control precision is low when the constant-frequency air conditioner compressor in the prior art needs to be provided with an internal overload protector or an external overload protector for overload protection, and achieve the effect of improving the control precision.
The invention provides an overload protection method of an air conditioner, which comprises the following steps: acquiring the current of the whole air conditioner and the current exhaust temperature of a compressor; determining whether the current is greater than or equal to a set current upper limit value or whether the current exhaust temperature is greater than or equal to a set temperature upper limit value; if the current is greater than or equal to the set current upper limit value or the current exhaust temperature is greater than or equal to the set temperature upper limit value, controlling the air conditioner to enter a set overload protection mode so as to realize overload protection on the air conditioner; and if the current is smaller than the set current upper limit value and the current exhaust temperature is smaller than the set temperature upper limit value, realizing overload protection of the air conditioner according to the reference exhaust temperature corresponding to the current.
Optionally, obtaining the current of the whole air conditioner and the current exhaust temperature of the compressor includes: and acquiring the current of the whole air conditioner detected by the current detection device, and acquiring the current exhaust temperature of the air conditioner at an exhaust pipe of a compressor detected by the temperature detection device.
Optionally, the implementing overload protection of the air conditioner according to the reference exhaust temperature corresponding to the current includes: determining a reference exhaust temperature corresponding to the present current; the reference exhaust temperature is smaller than the set temperature upper limit value; determining whether the current exhaust temperature is greater than or equal to the reference exhaust temperature; and if the current exhaust temperature is greater than or equal to the reference exhaust temperature, controlling the air conditioner to enter a set overload protection mode so as to realize overload protection of the air conditioner.
Optionally, determining a reference exhaust temperature corresponding to the present current comprises: f (χ) ═ a/(χ -B) + C; wherein f (χ) is a reference exhaust temperature; χ is the present current; A. b, C are all calculated coefficients, and the calculated coefficients are matched with the rated heat exchange quantity and/or model of the air conditioner.
Optionally, the overload protection of the air conditioner is realized according to the reference exhaust temperature corresponding to the current, further including: and if the current exhaust temperature is lower than the reference exhaust temperature, controlling the air conditioner to normally operate, and returning to the step of obtaining the current of the whole machine of the air conditioner and the current exhaust temperature of the compressor so as to continuously determine whether the air conditioner needs to enter overload protection.
Optionally, the overload protection mode includes: and controlling the compressor to stop.
In accordance with the above method, another aspect of the present invention provides an overload protection apparatus for an air conditioner, including: the acquisition unit is used for acquiring the current of the whole air conditioner and the current exhaust temperature of the compressor; the control unit is used for determining whether the current is greater than or equal to a set current upper limit value or whether the current exhaust temperature is greater than or equal to a set temperature upper limit value; the control unit is further configured to control the air conditioner to enter a set overload protection mode to achieve overload protection of the air conditioner if the current is greater than or equal to the set current upper limit value or the current exhaust temperature is greater than or equal to the set temperature upper limit value; and the control unit is also used for realizing overload protection of the air conditioner according to the reference exhaust temperature corresponding to the current if the current is less than the set current upper limit value and the current exhaust temperature is less than the set temperature upper limit value.
Optionally, the obtaining unit obtains a current of the whole air conditioner and a current exhaust temperature of the compressor, and includes: and acquiring the current of the whole air conditioner detected by the current detection device, and acquiring the current exhaust temperature of the air conditioner at an exhaust pipe of a compressor detected by the temperature detection device.
Optionally, the controlling unit implements overload protection of the air conditioner according to the reference exhaust temperature corresponding to the current, including: determining a reference exhaust temperature corresponding to the present current; the reference exhaust temperature is smaller than the set temperature upper limit value; determining whether the current exhaust temperature is greater than or equal to the reference exhaust temperature; and if the current exhaust temperature is greater than or equal to the reference exhaust temperature, controlling the air conditioner to enter a set overload protection mode so as to realize overload protection of the air conditioner.
Optionally, determining a reference exhaust temperature corresponding to the present current comprises: f (χ) ═ a/(χ -B) + C; wherein f (χ) is a reference exhaust temperature; χ is the present current; A. b, C are all calculated coefficients, and the calculated coefficients are matched with the rated heat exchange quantity and/or model of the air conditioner.
Optionally, the control unit implements overload protection of the air conditioner according to the reference exhaust temperature corresponding to the current, and further includes: and if the current exhaust temperature is lower than the reference exhaust temperature, controlling the air conditioner to normally operate, and returning to the step of obtaining the current of the whole machine of the air conditioner and the current exhaust temperature of the compressor so as to continuously determine whether the air conditioner needs to enter overload protection.
Optionally, the overload protection mode includes: and controlling the compressor to stop.
In accordance with another aspect of the present invention, there is provided an air conditioner including: the overload protection device of the air conditioner is described above.
In accordance with the above method, a further aspect of the present invention provides a storage medium comprising: the storage medium has stored therein a plurality of instructions; the plurality of instructions are used for loading and executing the overload protection method of the air conditioner by the processor.
In accordance with the above method, another aspect of the present invention provides an air conditioner, comprising: a processor for executing a plurality of instructions; a memory to store a plurality of instructions; wherein the instructions are stored in the memory, and loaded and executed by the processor.
The scheme of the invention can accurately realize overload protection by utilizing the functional relation between the current and the exhaust temperature, and has high reliability and good safety.
Furthermore, the scheme of the invention realizes the mechanical overload protection function in an electronic control mode, the electric signals are the current of the whole machine and the exhaust temperature, and the overload protection has good accuracy and high reliability.
Further, according to the scheme of the invention, overload protection is realized by utilizing the functional relation between the current and the exhaust temperature, the overload protection device can be suitable for overload protection of machine types with different refrigeration capacities, and the application range is wide.
Furthermore, the scheme of the invention realizes overload protection by utilizing the functional relation between the current and the exhaust temperature, and has simple structure and low cost.
Further, according to the scheme of the invention, overload protection is realized by utilizing the functional relation between the current and the exhaust temperature, the protection area is accurate, and the protection reliability and safety can be ensured.
Therefore, according to the scheme provided by the invention, the overload protection can be accurately realized by utilizing the functional relation between the current and the exhaust temperature, and the problem that the control precision is low when the fixed-frequency air conditioner compressor in the prior art needs to be provided with the built-in overload protector or the external overload protector for overload protection is solved, so that the defects of low control precision, low reliability and poor safety in the prior art are overcome, and the beneficial effects of high control precision, high reliability and good safety are realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic flowchart illustrating an overload protection method for an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating an embodiment of the method for implementing overload protection of the air conditioner according to the reference discharge temperature corresponding to the current;
FIG. 3 is a schematic structural diagram of an embodiment of an overload protection apparatus for an air conditioner according to the present invention;
FIG. 4 is a schematic control flow diagram illustrating overload protection of an embodiment of the air conditioner of the present invention;
fig. 5 is a graph illustrating a protection interval of the overload protection according to an embodiment of the air conditioner of the present invention.
The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:
10-a first protection interval; 20-a second protection interval; 30-a third protection interval; 102-an obtaining unit; 104-control unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to an embodiment of the present invention, an overload protection method for an air conditioner is provided, as shown in fig. 1, which is a schematic flow chart of an embodiment of the method of the present invention. The overload protection method of the air conditioner may include: step S110 to step S140.
At step S110, a current of the complete machine of the air conditioner and a current exhaust temperature of the compressor are obtained.
Optionally, the obtaining of the current of the whole air conditioner and the current exhaust temperature of the compressor in step S110 may include: and acquiring the current of the whole air conditioner detected by the current detection device, and acquiring the current exhaust temperature of the air conditioner at an exhaust pipe of a compressor detected by the temperature detection device.
For example: the temperature control device is provided with a current detection device, a temperature detection device and a control board.
Therefore, the current is obtained through the current detection device, the current exhaust temperature is obtained through the temperature detection device, the obtaining mode is simple and convenient, and the accuracy and the reliability of the obtaining result can be guaranteed.
At step S120, it is determined whether the present current is greater than or equal to a set current upper limit value (e.g., current b), or the present exhaust temperature is greater than or equal to a set temperature upper limit value (e.g., temperature c).
In step S130, if the current is greater than or equal to the set current upper limit value or the current exhaust temperature is greater than or equal to the set temperature upper limit value, the air conditioner is controlled to enter a set overload protection mode to implement overload protection on the air conditioner. By executing the set overload protection mode under the condition that the current is greater than or equal to the set current upper limit value or the current exhaust temperature is greater than or equal to the set temperature upper limit value, the timeliness and the reliability of protection can be guaranteed, the safety of air conditioner operation is improved, and the use experience of a user is improved.
For example: and setting an upper limit value b of the current and an upper limit value c of the exhaust temperature, and entering overload protection when the current I is more than or equal to b or T is more than or equal to c, so that the condition that the machine is not protected due to abnormal exhaust temperature and current can be avoided.
Wherein the overload protection mode may include: and controlling the compressor to stop. Overload protection is carried out by controlling the compressor to stop, so that the protection reliability is high and the safety is good.
In step S140, if the current is smaller than the set current upper limit value and the current exhaust temperature is smaller than the set temperature upper limit value, overload protection of the air conditioner is implemented according to a reference exhaust temperature corresponding to the current.
For example: the function of the overload protector can be accurately realized by utilizing the functional relation between the current and the exhaust temperature, and the overload protector is safer and more reliable than the overload protector; the mechanical overload protection function can be realized in an electronic control mode, the electric signals are the current of the whole machine and the exhaust temperature, and an overload protection curve is simulated through the current and the exhaust pipe temperature.
Therefore, the overload protection is carried out on the air conditioner according to the reference exhaust temperature corresponding to the current when the current and the current exhaust temperature of the air conditioner are detected and the current is smaller than the set current upper limit value and the current exhaust temperature is smaller than the set temperature upper limit value, so that the protection precision is high, and the reliability and the safety of the protection can be guaranteed.
Optionally, with reference to a schematic flow chart of an embodiment of the method of the present invention shown in fig. 2, where the overload protection of the air conditioner is implemented according to the reference exhaust temperature corresponding to the current, further describing a specific process of implementing the overload protection of the air conditioner according to the reference exhaust temperature corresponding to the current in step S140, the specific process may include: step S210 to step S230.
Step S210, determining a reference exhaust temperature corresponding to the current; the reference exhaust temperature is less than the set temperature upper limit value.
More optionally, determining a reference exhaust temperature corresponding to the present current may include: f (χ) ═ a/(χ -B) + C.
Wherein f (χ) is a reference exhaust temperature, χ is the current, A, B, C are calculation coefficients, and the calculation coefficients are matched with the rated heat exchange quantity and/or model of the air conditioner.
For example: according to the practical condition of air conditioner overload, a function f (X) ═ A/(X-B) + C (X > B, A > 0, B > 0 and C > 0) can be set. Wherein f (χ) is the temperature T of the exhaust pipe; χ is current I; A. b, C is a calculation coefficient, which may be a constant; three constants, and thus functions, may be determined A, B, C based on the air conditioning overload condition.
For example: the function f (χ) ═ A/(χ -B) + C can realize the adjustment of overload parameters by adjusting A, B, C three constants to replace different overload protectors; the overload parameter can be adjusted by adjusting A, B, C three constants, and the function f (χ) ═ a/(χ -B) + C can be suitable for models with different cold capacities instead of different overload protectors.
Therefore, by setting the functional relation between the current and the exhaust temperature, on one hand, the accuracy of calculating the reference exhaust temperature can be ensured, and the reliability is high; on the other hand, the air conditioner is applicable to various air conditioners and has strong universality.
Step S220, determining whether the current exhaust temperature is greater than or equal to the reference exhaust temperature.
And step S230, if the current exhaust temperature is greater than or equal to the reference exhaust temperature, controlling the air conditioner to enter a set overload protection mode so as to realize overload protection of the air conditioner.
For example: and when the current value I is equal to x and the exhaust temperature T is more than or equal to f (x), overload protection is carried out.
Therefore, when the current is equal to a set current value in a set current range, the corresponding reference exhaust temperature is calculated according to the current, and overload protection control is performed under the condition that the current exhaust temperature is greater than or equal to the reference exhaust temperature, so that the protection accuracy is good, and the reliability is high.
Further optionally, the step S140 of implementing overload protection of the air conditioner according to the reference exhaust temperature corresponding to the current may further include: and if the current exhaust temperature is lower than the reference exhaust temperature, controlling the air conditioner to normally operate, and returning to the step of obtaining the current of the whole machine of the air conditioner and the current exhaust temperature of the compressor so as to continuously determine whether the air conditioner needs to enter overload protection.
For example: and if the current value is smaller than the set current upper limit value, the current exhaust temperature is smaller than the set temperature upper limit value, and the current exhaust temperature is smaller than the reference exhaust temperature corresponding to the current value, controlling the air conditioner to normally operate, and returning to the step of obtaining the current of the whole air conditioner and the current exhaust temperature of the compressor so as to continuously judge whether the air conditioner enters overload protection.
Therefore, under the condition that the current is not a set current value within a set current range or the current exhaust temperature is smaller than the reference exhaust temperature, the normal operation of the air conditioner is controlled, the reliability and the safety of the operation of the air conditioner are guaranteed, and the user experience is improved.
Through a large number of tests, the technical scheme of the embodiment can accurately realize overload protection by utilizing the functional relation between the current and the exhaust temperature, and has high reliability and good safety.
According to an embodiment of the invention, an overload protection device of an air conditioner corresponding to the overload protection method of the air conditioner is also provided. Referring to fig. 3, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The overload protection apparatus of the air conditioner may include: an acquisition unit 102 and a control unit 104.
In an optional example, the obtaining unit 102 may be configured to obtain a current of the whole air conditioner and a current exhaust temperature of the compressor. The specific functions and processes of the acquiring unit 102 are referred to in step S110.
Alternatively, the obtaining unit 102 obtains the current of the whole air conditioner and the current exhaust temperature of the compressor, and may include: the obtaining unit 102 may be further configured to obtain a current of the whole air conditioner detected by the current detecting device, and obtain a current exhaust temperature at an exhaust pipe of a compressor of the air conditioner detected by the temperature detecting device.
For example: the temperature control device is provided with a current detection device, a temperature detection device and a control board.
Therefore, the current is obtained through the current detection device, the current exhaust temperature is obtained through the temperature detection device, the obtaining mode is simple and convenient, and the accuracy and the reliability of the obtaining result can be guaranteed.
In an alternative example, the control unit 104 may be configured to determine whether the present current is greater than or equal to a set current upper limit value (e.g., current b), or whether the present exhaust temperature is greater than or equal to a set temperature upper limit value (e.g., temperature c). The specific function and processing of the control unit 104 are referred to in step S120.
In an optional example, the control unit 104 may be further configured to control the air conditioner to enter a set overload protection mode if the current is greater than or equal to the set current upper limit value or the current exhaust temperature is greater than or equal to the set temperature upper limit value, so as to implement overload protection on the air conditioner. The specific function and processing of the control unit 104 are shown in step S130. By executing the set overload protection mode under the condition that the current is greater than or equal to the set current upper limit value or the current exhaust temperature is greater than or equal to the set temperature upper limit value, the timeliness and the reliability of protection can be guaranteed, the safety of air conditioner operation is improved, and the use experience of a user is improved.
For example: and setting an upper limit value b of the current and an upper limit value c of the exhaust temperature, and entering overload protection when the current I is more than or equal to b or T is more than or equal to c, so that the condition that the machine is not protected due to abnormal exhaust temperature and current can be avoided.
Wherein the overload protection mode may include: and controlling the compressor to stop. Overload protection is carried out by controlling the compressor to stop, so that the protection reliability is high and the safety is good.
In an optional example, the control unit 104 may be further configured to implement overload protection of the air conditioner according to a reference exhaust temperature corresponding to the current if the current is less than the set current upper limit value and the current exhaust temperature is less than the set temperature upper limit value. The specific function and processing of the control unit 104 are also referred to in step S140.
For example: the function of the overload protector can be accurately realized by utilizing the functional relation between the current and the exhaust temperature, and the overload protector is safer and more reliable than the overload protector; the mechanical overload protection function can be realized in an electronic control mode, the electric signals are the current of the whole machine and the exhaust temperature, and an overload protection curve is simulated through the current and the exhaust pipe temperature.
Therefore, the overload protection is carried out on the air conditioner according to the reference exhaust temperature corresponding to the current when the current and the current exhaust temperature of the air conditioner are detected and the current is smaller than the set current upper limit value and the current exhaust temperature is smaller than the set temperature upper limit value, so that the protection precision is high, and the reliability and the safety of the protection can be guaranteed.
Optionally, the implementing, by the control unit 104, overload protection of the air conditioner according to the reference exhaust temperature corresponding to the current may include:
the control unit 104 may be further configured to determine a reference exhaust temperature corresponding to the present current; the reference exhaust temperature is less than the set temperature upper limit value. The specific functions and processes of the control unit 104 are also referred to in step S210.
More optionally, determining a reference exhaust temperature corresponding to the present current may include: f (χ) ═ a/(χ -B) + C.
Wherein f (χ) is a reference exhaust temperature, χ is the current, A, B, C are calculation coefficients, and the calculation coefficients are matched with the rated heat exchange quantity and/or model of the air conditioner.
For example: according to the practical condition of air conditioner overload, a function f (X) ═ A/(X-B) + C (X > B, A > 0, B > 0 and C > 0) can be set. Wherein f (χ) is the temperature T of the exhaust pipe; χ is current I; A. b, C is a calculation coefficient, which may be a constant; three constants, and thus functions, may be determined A, B, C based on the air conditioning overload condition.
For example: the function f (χ) ═ A/(χ -B) + C can realize the adjustment of overload parameters by adjusting A, B, C three constants to replace different overload protectors; the overload parameter can be adjusted by adjusting A, B, C three constants, and the function f (χ) ═ a/(χ -B) + C can be suitable for models with different cold capacities instead of different overload protectors.
Therefore, by setting the functional relation between the current and the exhaust temperature, on one hand, the accuracy of calculating the reference exhaust temperature can be ensured, and the reliability is high; on the other hand, the air conditioner is applicable to various air conditioners and has strong universality.
The control unit 104 may be further configured to determine whether the current exhaust temperature is greater than or equal to the reference exhaust temperature. The specific functions and processes of the control unit 104 are also referred to in step S220.
The control unit 104 may be further configured to control the air conditioner to enter a set overload protection mode if the current exhaust temperature is greater than or equal to the reference exhaust temperature, so as to implement overload protection on the air conditioner. The specific function and processing of the control unit 104 are also referred to in step S230.
For example: and when the current value I is equal to x and the exhaust temperature T is more than or equal to f (x), overload protection is carried out.
Therefore, when the current is equal to a set current value in a set current range, the corresponding reference exhaust temperature is calculated according to the current, and overload protection control is performed under the condition that the current exhaust temperature is greater than or equal to the reference exhaust temperature, so that the protection accuracy is good, and the reliability is high.
Further optionally, the controlling unit 104 implements overload protection of the air conditioner according to the reference exhaust temperature corresponding to the current, and may further include: the control unit 104 may be further configured to control the air conditioner to normally operate if the current exhaust temperature is less than the reference exhaust temperature, and return to the step of obtaining the current of the complete air conditioner and the current exhaust temperature of the compressor to continuously determine whether the air conditioner needs to enter overload protection.
Therefore, under the condition that the current is not a set current value within a set current range or the current exhaust temperature is smaller than the reference exhaust temperature, the normal operation of the air conditioner is controlled, the reliability and the safety of the operation of the air conditioner are guaranteed, and the user experience is improved.
Since the processes and functions implemented by the apparatus of this embodiment substantially correspond to the embodiments, principles and examples of the method shown in fig. 1 to 2, the description of this embodiment is not detailed, and reference may be made to the related descriptions in the foregoing embodiments, which are not repeated herein.
A large number of tests prove that by adopting the technical scheme of the invention, the mechanical overload protection function is realized in an electronic control mode, the electric signals are the current of the whole machine and the exhaust temperature, and the overload protection has good accuracy and high reliability.
According to the embodiment of the invention, an air conditioner corresponding to the overload protection device of the air conditioner is also provided. The air conditioner may include: the overload protection device of the air conditioner is described above.
In patent document No. 201210442944.5, the start and stop of the compressor can be controlled electronically, and the start and stop of the compressor are controlled only by a current value and a discharge temperature value, and precise control cannot be achieved.
In an alternative embodiment, the solution of the invention, which uses the functional relationship between the current and the exhaust temperature, allows to precisely implement the function of the overload protector and is safer and more reliable than the overload protector. For example: more precisely than the patent (application) No. 201210442944.5.
Specifically, the scheme of the invention can realize the mechanical overload protection function in an electronic control mode, the electric signals are the current of the whole machine and the exhaust temperature, and the overload protection curve is simulated through the current and the exhaust pipe temperature. The control method must be provided with a current detection device, a temperature detection device and a control board.
In an alternative example, referring to the example shown in fig. 4, according to the actual condition of the air conditioner overload, a function f (χ) ═ a/(χ -B) + C (χ > B, a > 0, B > 0, C > 0) may be set. Wherein f (χ) is the temperature T of the exhaust pipe; χ is current I; A. b, C is a calculation coefficient, which may be a constant.
For example: setting a function f (x) ═ A/(x-B) + C (x > B, A > 0, B > 0 and C > 0), wherein f (x) is the temperature T of the exhaust pipe and x is the current I. Three constants, and thus functions, may be determined A, B, C based on the air conditioning overload condition.
Alternatively, the function f (χ) ═ a/(χ -B) + C, the adjustment of the overload parameter can be achieved by adjusting A, B, C three constants, instead of different overload protectors.
For example: the function f (χ) ═ a/(χ -B) + C can realize the adjustment of the overload parameter by adjusting A, B, C three constants, so as to replace different overload protectors. That is, the function f (χ) ═ a/(χ -B) + C can be applied to models with different coldness.
Optionally, overload protection is entered when the current value I ═ χ and the exhaust temperature T ≧ f (χ).
Optionally, a current upper limit value b and an exhaust temperature upper limit value c are set, and overload protection is entered when the current I ≧ b or T ≧ c.
For example: and setting an upper limit value b of the current and an upper limit value c of the exhaust temperature, and entering overload protection when the current I is more than or equal to b or T is more than or equal to c, so that the condition that the machine is not protected due to abnormal exhaust temperature and current can be avoided.
In an alternative embodiment, the most advantageous feature of the alternative 201210442944.5 of the present invention is that it is more accurate and reliable than the control scheme of patent 201210442944.5.
For example: referring to the example shown in fig. 5, the protection interval of 201210442944.5 may be the protection area formed by the first protection interval 10, the second protection interval 20, and the third protection interval 30, but the protection interval of the present invention may be exactly the protection area formed by the first protection interval 10.
Since the processing and functions of the air conditioner of this embodiment are basically corresponding to the embodiments, principles and examples of the apparatus shown in fig. 3, the description of this embodiment is not given in detail, and reference may be made to the related descriptions in the embodiments, which are not described herein again.
Through a large number of tests, the technical scheme of the invention realizes overload protection by utilizing the functional relation between the current and the exhaust temperature, can be suitable for overload protection of machine types with different cold quantities, and has wide application range.
According to an embodiment of the present invention, there is also provided a storage medium corresponding to an overload protection method of an air conditioner. The storage medium may include: the storage medium has stored therein a plurality of instructions; the plurality of instructions are used for loading and executing the overload protection method of the air conditioner by the processor.
Since the processing and functions implemented by the storage medium of this embodiment substantially correspond to the embodiments, principles, and examples of the methods shown in fig. 1 to fig. 2, details are not described in the description of this embodiment, and reference may be made to the related descriptions in the foregoing embodiments, which are not described herein again.
Through a large number of tests, the technical scheme of the invention realizes overload protection by utilizing the functional relation between the current and the exhaust temperature, and has simple structure and low cost.
According to an embodiment of the invention, an air conditioner corresponding to an overload protection method of the air conditioner is also provided. The air conditioner may include: a processor for executing a plurality of instructions; a memory to store a plurality of instructions; wherein the instructions are stored in the memory, and loaded and executed by the processor.
Since the processing and functions of the air conditioner of this embodiment are basically corresponding to the embodiments, principles and examples of the methods shown in fig. 1 to fig. 2, the description of this embodiment is not detailed, and reference may be made to the related descriptions in the foregoing embodiments, which are not described herein again.
Through a large number of tests, the technical scheme of the invention realizes overload protection by utilizing the functional relation between the current and the exhaust temperature, the protection area is accurate, and the protection reliability and safety can be ensured.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (13)
1. An overload protection method of an air conditioner is characterized by comprising the following steps:
acquiring the current of the whole air conditioner and the current exhaust temperature of a compressor;
determining whether the current is greater than or equal to a set current upper limit value or whether the current exhaust temperature is greater than or equal to a set temperature upper limit value;
if the current is greater than or equal to the set current upper limit value or the current exhaust temperature is greater than or equal to the set temperature upper limit value, controlling the air conditioner to enter a set overload protection mode so as to realize overload protection on the air conditioner;
if the current is smaller than the set current upper limit value and the current exhaust temperature is smaller than the set temperature upper limit value, the overload protection of the air conditioner is realized according to the reference exhaust temperature corresponding to the current;
according to the reference exhaust temperature corresponding to the current, the overload protection of the air conditioner is realized, and the overload protection method comprises the following steps:
determining a reference exhaust temperature corresponding to the present current; the reference exhaust temperature is smaller than the set temperature upper limit value;
determining whether the current exhaust temperature is greater than or equal to the reference exhaust temperature;
and if the current exhaust temperature is greater than or equal to the reference exhaust temperature, controlling the air conditioner to enter a set overload protection mode so as to realize overload protection of the air conditioner.
2. The method of claim 1, wherein obtaining the current of the whole air conditioner and the current exhaust temperature of a compressor comprises:
and acquiring the current of the whole air conditioner detected by the current detection device, and acquiring the current exhaust temperature of the air conditioner at an exhaust pipe of a compressor detected by the temperature detection device.
3. The method of claim 1, wherein determining a reference exhaust temperature corresponding to the present current comprises:
f（χ）=A/(χ-B)+C；
wherein f (χ) is a reference exhaust temperature; χ is the present current; A. b, C are all calculated coefficients, and the calculated coefficients are matched with the rated heat exchange quantity and/or model of the air conditioner.
4. The method according to any one of claims 1 to 3, wherein the overload protection of the air conditioner is realized according to the reference exhaust temperature corresponding to the current, and further comprising:
and if the current exhaust temperature is lower than the reference exhaust temperature, controlling the air conditioner to normally operate, and returning to the step of obtaining the current of the whole machine of the air conditioner and the current exhaust temperature of the compressor so as to continuously determine whether the air conditioner needs to enter overload protection.
5. The method of claim 1, wherein the overload protection mode comprises: and controlling the compressor to stop.
6. An overload protection apparatus of an air conditioner, comprising:
the acquisition unit is used for acquiring the current of the whole air conditioner and the current exhaust temperature of the compressor;
the control unit is used for determining whether the current is greater than or equal to a set current upper limit value or whether the current exhaust temperature is greater than or equal to a set temperature upper limit value;
the control unit is further configured to control the air conditioner to enter a set overload protection mode to achieve overload protection of the air conditioner if the current is greater than or equal to the set current upper limit value or the current exhaust temperature is greater than or equal to the set temperature upper limit value;
the control unit is further configured to implement overload protection of the air conditioner according to a reference exhaust temperature corresponding to the current if the current is less than the set current upper limit value and the current exhaust temperature is less than the set temperature upper limit value;
the control unit realizes overload protection of the air conditioner according to the reference exhaust temperature corresponding to the current, and the overload protection comprises the following steps:
determining a reference exhaust temperature corresponding to the present current; the reference exhaust temperature is smaller than the set temperature upper limit value;
determining whether the current exhaust temperature is greater than or equal to the reference exhaust temperature;
and if the current exhaust temperature is greater than or equal to the reference exhaust temperature, controlling the air conditioner to enter a set overload protection mode so as to realize overload protection of the air conditioner.
7. The apparatus of claim 6, wherein the obtaining unit obtains a current of the whole machine of the air conditioner and a current exhaust temperature of a compressor, and comprises:
and acquiring the current of the whole air conditioner detected by the current detection device, and acquiring the current exhaust temperature of the air conditioner at an exhaust pipe of a compressor detected by the temperature detection device.
8. The apparatus of claim 7, wherein determining a reference exhaust temperature corresponding to the present current comprises:
f（χ）=A/(χ-B)+C；
wherein f (χ) is a reference exhaust temperature; χ is the present current; A. b, C are all calculated coefficients, and the calculated coefficients are matched with the rated heat exchange quantity and/or model of the air conditioner.
9. The apparatus according to any one of claims 6 to 8, wherein the control unit implements overload protection of the air conditioner according to a reference discharge temperature corresponding to the present current, further comprising:
and if the current exhaust temperature is lower than the reference exhaust temperature, controlling the air conditioner to normally operate, and returning to the step of obtaining the current of the whole machine of the air conditioner and the current exhaust temperature of the compressor so as to continuously determine whether the air conditioner needs to enter overload protection.
10. The apparatus of claim 6, wherein the overload protection mode comprises: and controlling the compressor to stop.
11. An air conditioner, comprising: an overload protector for air conditioner according to any one of claims 6 to 10.
12. A storage medium having a plurality of instructions stored therein; the plurality of instructions for loading and executing the overload protection method of the air conditioner according to any one of claims 1 to 5 by the processor.
13. An air conditioner, comprising:
a processor for executing a plurality of instructions;
a memory to store a plurality of instructions;
wherein the instructions are stored in the memory, and loaded by the processor and executed by the processor to perform the overload protection method of the air conditioner according to any one of claims 1 to 5.
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| CN201810995089.8A CN109297134B (en) | 2018-08-29 | 2018-08-29 | Overload protection method and device for air conditioner, storage medium and air conditioner |
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| CN201810995089.8A CN109297134B (en) | 2018-08-29 | 2018-08-29 | Overload protection method and device for air conditioner, storage medium and air conditioner |
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| CN110108002B (en) * | 2019-05-31 | 2021-02-26 | 珠海格力电器股份有限公司 | Outdoor unit operation control method and device for improving operation energy efficiency and stability |
| CN112050429A (en) * | 2019-06-05 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and device for fixed-frequency air conditioner and fixed-frequency air conditioner |
| CN110617606B (en) * | 2019-09-23 | 2021-09-21 | 芜湖美智空调设备有限公司 | Air conditioner and control method and system thereof |
| CN110595015B (en) * | 2019-09-25 | 2020-12-11 | 珠海格力电器股份有限公司 | Adjusting method and device of frequency conversion equipment |
| CN110779161B (en) * | 2019-11-18 | 2021-08-27 | 宁波奥克斯电气股份有限公司 | Control method and device for compressor overload protection and air conditioner |
| CN111076349B (en) * | 2019-12-24 | 2021-01-26 | 珠海格力电器股份有限公司 | Operation control method and device, storage medium and air conditioner |
| CN111637587B (en) * | 2020-05-28 | 2021-12-31 | 宁波奥克斯电气股份有限公司 | Control method and system for compressor overload protection and air conditioner |
| CN111795479A (en) * | 2020-07-09 | 2020-10-20 | 广东Tcl智能暖通设备有限公司 | Control method and device for air conditioner outdoor unit, air conditioner outdoor unit and storage medium |
| CN114135986B (en) * | 2020-09-04 | 2023-06-30 | 广东美的制冷设备有限公司 | Air conditioner, control method thereof and computer readable storage medium |
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