Air conditioner control method, air conditioner, storage medium, and electronic device

Abstract

The present invention provides a control method for an air conditioner, an air conditioner, a storage medium, and an electronic device, wherein the method comprises: detecting the ambient temperature of the air conditioner before the heater is operated, wherein the heater is installed at the air inlet end of the condenser of the air conditioner; judging whether the ambient temperature is lower than the lowest refrigeration temperature of the refrigerant of the air conditioner; if the ambient temperature is lower than the lowest refrigeration temperature of the refrigerant of the air conditioner, using the heater to increase the air inlet temperature of the condenser. The technical problem that the air conditioner cannot refrigerate when the ambient temperature is too low in the related art is solved, and the reliable refrigeration demand under ultra-wide ambient temperature can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a control method for an air conditioner, an air conditioner, a storage medium, and an electronic device. Background Art

[0002] In related technologies, with the increasing smoothness of informatization and dataization and the opening up of global transportation, the application of mobile communication vehicles or special vehicles is no longer limited to a certain area. The same vehicle may be used near the equator or in a hot desert at a certain time, and may be used in a plateau or in the extremely cold areas of the far north at another time. However, since communications, antennas and other equipment are subject to high-intensity radiation interference, such cabinets must be sealed to ensure that the electronic devices inside the cabinet are not affected by the radiation interference of the antenna and affect the normal operation of the electronic equipment. In this way, the heat generated by the electronic equipment cannot produce a large difference in the heat dissipated through the cabinet wall due to the hot and cold regions. Temperature control equipment is still needed to cool it at extremely low temperatures of -40~-50℃, and electronic equipment in the cabinet needs temperature control equipment to cool it even more in an environment of more than 60℃.

[0003] In the related technology, the commonly used high-temperature refrigerant is R134a, but its boiling point is only -26.1℃. It will not evaporate below this temperature, resulting in its inability to provide cooling; it has a low boiling point (-42.1℃), a high critical temperature point (96.7℃), and is flammable and explosive, so it cannot be used; it has a low boiling point (-56.1℃) but the critical temperature point (72.58℃) is not high enough to meet the cooling requirements of ambient temperatures above 55℃, unless the heat exchange area is made infinitely large, which is obviously unrealistic; in short, there is no suitable single refrigerant that can meet the cooling requirements of both low temperatures of -45℃ and high temperatures of 65℃, which results in the air conditioner being unable to perform cooling under extreme conditions where the ambient temperature is lower than the boiling point.

[0004] With respect to the above-mentioned problems existing in the related technologies, no efficient and accurate solutions have been found yet. Summary of the invention

[0005] The present invention provides a control method for an air conditioner, an air conditioner, a storage medium, and an electronic device, so as to solve the technical problem in the related art that the air conditioner cannot provide refrigeration under the condition that the ambient temperature is too low.

[0006] According to one embodiment of the present invention, a method for controlling an air conditioner is provided, comprising: detecting the ambient temperature of the air conditioner before the heater of the air conditioner is operated, wherein the heater is externally arranged at the air inlet end of the condenser of the air conditioner; judging whether the ambient temperature is lower than the lowest cooling temperature of the refrigerant of the air conditioner; if the ambient temperature is lower than the lowest cooling temperature of the refrigerant of the air conditioner, using the heater to increase the air inlet temperature of the condenser.

[0007] Optionally, using the heater to increase the intake air temperature of the condenser includes: determining a minimum heat exchange air volume of the condensing fan of the condenser, and determining a target temperature set by the air conditioner, wherein the target temperature is the lowest ambient temperature required for cooling, and the target temperature is lower than the lowest cooling temperature; calculating the heating power of the heater based on the target temperature, the lowest cooling temperature, the ambient temperature, and the minimum heat exchange air volume; and operating the heater based on the heating power to increase the intake air temperature of the condenser.

[0008] Optionally, calculating the heating power of the heater according to the target temperature, the minimum cooling temperature, the ambient temperature, and the minimum heat exchange air volume includes: using the target temperature, the minimum cooling temperature, and the minimum heat exchange air volume to calculate the minimum configured heating amount of the heater; using the minimum configured heating amount, the target temperature, the minimum cooling temperature, and the ambient temperature to calculate the heating power of the heater.

[0009] Optionally, using the minimum configured heating amount, the target temperature, the minimum cooling temperature, and the ambient temperature to calculate the heating power of the heater includes: using the following formula to calculate the heating power Q of the heater: Q=(T nmin -T) / (T nmin -T xmin )×Q min ; Among them, Q min is the minimum configuration heating amount, T xmin is the target temperature, T nmin is the minimum cooling temperature, and T is the ambient temperature.

[0010] Optionally, using the target temperature, the minimum cooling temperature, and the minimum heat exchange air volume to calculate the minimum configured heating amount of the heater includes: using the following formula to calculate the minimum configured heating amount Q of the heater: min :Q min =G min ×c p ×(T nmin -T xmin ) ; where T xmin is the target temperature, T nmin is the minimum refrigeration temperature, G min is the minimum heat exchange air volume, c p is the specific heat capacity of air.

[0011] Optionally, after determining whether the ambient temperature is lower than the minimum cooling temperature of the refrigerant of the air conditioner, the method further includes: if the ambient temperature is higher than or equal to the minimum cooling temperature of the refrigerant of the air conditioner, obtaining the lower limit condensing temperature and the real-time condensing temperature of the condenser; calculating the temperature difference between the lower limit condensing temperature and the real-time condensing temperature; and adjusting the speed of the condensing fan of the condenser based on the temperature difference.

[0012] Optionally, if the ambient temperature is lower than the minimum cooling temperature of the refrigerant of the air conditioner, the method further includes: controlling the condensing fan of the condenser to run at a constant minimum speed, and adjusting the throttling device of the air conditioner to the maximum allowable opening of the current outdoor ambient temperature.

[0013] According to another embodiment of the present invention, there is provided an air conditioning system, comprising: a heater and an air conditioner, the air conditioner comprising a controller, the controller comprising: a detection module, for detecting the ambient temperature of the air conditioner before the heater is operated, wherein the heater is externally arranged at the air inlet end of the condenser of the air conditioner; a judgment module, for judging whether the ambient temperature is lower than the lowest cooling temperature of the refrigerant of the air conditioner; and a heating module, for using the heater to increase the air inlet temperature of the condenser if the ambient temperature is lower than the lowest cooling temperature of the refrigerant of the air conditioner.

[0014] Optionally, the heating module includes: a determination unit for determining a minimum heat exchange air volume of the condensing fan of the condenser, and determining a target temperature set for the air conditioner, wherein the target temperature is the minimum ambient temperature required for cooling, and the target temperature is lower than the minimum cooling temperature; a calculation unit for calculating the heating power of the heater based on the target temperature, the minimum cooling temperature, the ambient temperature, and the minimum heat exchange air volume; and an operation unit for operating the heater based on the heating power to increase the intake air temperature of the condenser.

[0015] Optionally, the calculation unit includes: a first calculation subunit, used to calculate the minimum configured heating amount of the heater using the target temperature, the minimum cooling temperature, and the minimum heat exchange air volume; and a second calculation subunit, used to calculate the heating power of the heater using the minimum configured heating amount, the target temperature, the minimum cooling temperature, and the ambient temperature.

[0016] Optionally, the second calculation subunit is further used to calculate the heating power Q of the heater using the following formula: Q=(T nmin -T) / (T nmin -T xmin )×Q min ; Among them, Q min is the minimum configuration heating amount, Txmin is the target temperature, T nmin is the minimum cooling temperature, and T is the ambient temperature.

[0017] Optionally, the first calculation subunit is further used to calculate the minimum configuration heating amount Q of the heater using the following formula: min :Q min = G min ×c p ×(T nmin -T xmin ) ; where T xmin is the target temperature, T nmin is the minimum refrigeration temperature, G min is the minimum heat exchange air volume, c p is the specific heat capacity of air.

[0018] Optionally, the device also includes: an acquisition module, used to obtain the lower limit condensing temperature and real-time condensing temperature of the condenser after the judgment module determines whether the ambient temperature is lower than the lowest refrigeration temperature of the refrigerant of the air conditioner, if the ambient temperature is higher than or equal to the lowest refrigeration temperature of the refrigerant of the air conditioner; a calculation module, used to calculate the temperature difference between the lower limit condensing temperature and the real-time condensing temperature; and an adjustment module, used to adjust the speed of the condensing fan of the condenser based on the temperature difference.

[0019] Optionally, if the ambient temperature is lower than the minimum cooling temperature of the refrigerant of the air conditioner, the device also includes: a control module, used to control the condensing fan of the condenser to run at a constant minimum speed, and adjust the throttling device of the air conditioner to the maximum allowable opening of the current outdoor ambient temperature.

[0020] According to another aspect of an embodiment of the present application, a storage medium is further provided, which includes a stored program, and the above steps are executed when the program is run.

[0021] According to another aspect of an embodiment of the present application, there is also provided an electronic device, including a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; wherein: the memory is used to store computer programs; and the processor is used to execute the steps in the above method by running the program stored in the memory.

[0022] According to yet another embodiment of the present invention, a storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above-mentioned device embodiments when running.

[0023] Through the embodiments of the present invention, the ambient temperature of the air conditioner before the heater is operated is detected, wherein the heater is externally arranged at the air inlet end of the condenser of the air conditioner, and it is determined whether the ambient temperature is lower than the lowest refrigeration temperature of the refrigerant of the air conditioner. If the ambient temperature is lower than the lowest refrigeration temperature of the refrigerant of the air conditioner, the heater is used to increase the air inlet temperature of the condenser. By adding a heater at the air inlet end of the condenser, the temperature of air entering the condenser can be increased, and the actual ambient temperature can be increased, so that the ambient temperature collected by the temperature sensing package can be above the lowest refrigeration temperature, thereby lowering the lowest ambient temperature for refrigeration of the air conditioner, broadening the ambient temperature range for operation of the air conditioner, solving the technical problem in the related art that the air conditioner cannot provide refrigeration when the ambient temperature is too low, and realizing reliable refrigeration requirements under ultra-wide ambient temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 is a hardware structure block diagram of an air conditioner according to an embodiment of the present invention;

[0026] Figure 2 is a flow chart of a method for controlling an air conditioner according to an embodiment of the present invention;

[0027] Figure 3 is a schematic diagram of an air conditioning system in an embodiment of the present invention;

[0028] Figure 4 is a flow chart of air conditioning refrigeration in an embodiment of the present invention;

[0029] Figure 5 It is a structural block diagram of an air conditioner according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] Example 1

[0033] The method embodiment provided in the first embodiment of the present application can be executed in an air conditioner, a refrigerator, a cold storage, a fresh-keeping cabinet, a refrigeration controller or a similar equipment management device. Taking the operation on an air conditioner as an example, Figure 1 FIG. 1 is a hardware structure diagram of an air conditioner according to an embodiment of the present invention. Figure 1 As shown, the air conditioner may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data. Optionally, the air conditioner may also include a transmission device 106 and an input / output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above air conditioner. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0034] The memory 104 can be used to store air conditioning programs, for example, software programs and modules of application software, such as an air conditioning program corresponding to a control method of an air conditioner in an embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the air conditioning program stored in the memory 104, that is, to implement the above method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories may be connected to the air conditioner via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0035] The transmission device 106 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the air conditioner. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0036] In this embodiment, a method for controlling an air conditioner is provided. Figure 2 is a flow chart of a method for controlling an air conditioner according to an embodiment of the present invention. Figure 2 As shown, the process includes the following steps:

[0037] Step S202, detecting the ambient temperature of the air conditioner before the heater is operated, wherein the heater is externally mounted on the air inlet end of the condenser of the air conditioner;

[0038] The air conditioner of this embodiment also has an external heater, which is deployed at the air inlet end (air inlet) of the air conditioner condenser. The heater can be an electric heater, a solar heater, a water heater, etc., which is used to heat the ambient temperature to increase the ambient temperature sensed by the ambient temperature sensing package of the condenser, so that the ambient temperature sensed by the ambient temperature sensing package is higher than the lowest cooling temperature of the air conditioner.

[0039] Step S204, determining whether the ambient temperature is lower than the lowest cooling temperature of the refrigerant of the air conditioner;

[0040] The minimum cooling temperature of this embodiment is the lower limit temperature of the environment at which the air conditioner can reliably operate in the cooling mode (cooling the indoor room). For a specific air conditioner, the minimum cooling temperature is a fixed value, which is mainly related to the refrigerant type of the air conditioner refrigerant and the safety margin corresponding to the control level of the air conditioner refrigeration system.

[0041] In one example, the lowest refrigeration temperature T of the refrigerant of the air conditioner can also be determined first. nmin , the lowest achievable cooling temperature of the refrigerant T nmin Equal to the boiling point temperature T of the refrigerant f +Safety margin T yl , safety margin T yl Determined according to the control level of the refrigeration system, the value is > 0℃.

[0042] Optionally, the refrigerant of the air conditioner in this embodiment is not specifically limited and can be a conventional general refrigerant, such as R134a, fluorine pump, air liquid, etc.

[0043] Step S206, if the ambient temperature is lower than the lowest cooling temperature of the refrigerant of the air conditioner, using the heater to increase the intake air temperature of the condenser;

[0044] If the ambient temperature of the current working condition is lower than the minimum cooling temperature of the refrigerant of the air conditioner, the refrigerant of the air conditioner cannot cool, and the ambient temperature needs to be heated, and the heated ambient temperature is made higher than the minimum cooling temperature.

[0045] The solution of this embodiment can be applied to a scenario where the refrigeration space where the indoor unit is located is high temperature and closed and the ambient temperature where the outdoor unit is located is extremely low, such as a communication cabinet, and can also be applied to refrigeration conditions in an extremely cold external environment.

[0046] Through the above steps, the ambient temperature of the air conditioner before the heater is operated is detected, wherein the heater is externally arranged at the air inlet end of the condenser of the air conditioner, and it is determined whether the ambient temperature is lower than the lowest refrigeration temperature of the refrigerant of the air conditioner. If the ambient temperature is lower than the lowest refrigeration temperature of the refrigerant of the air conditioner, the heater is used to increase the air inlet temperature of the condenser. By adding a heater at the air inlet end of the condenser, the temperature of air entering the condenser can be increased, and the actual ambient temperature can be increased, so that the ambient temperature collected by the temperature sensing package can be above the lowest refrigeration temperature, thereby lowering the lowest ambient temperature of the air conditioner refrigeration, widening the ambient temperature range of the air conditioner operation, and solving the technical problem in the related technology that the air conditioner cannot provide refrigeration when the ambient temperature is too low, and reliable refrigeration requirements under ultra-wide ambient temperatures can be met.

[0047] Figure 3 is a schematic diagram of an air conditioning system in an embodiment of the present invention, the air conditioning system includes an air conditioner and a heater externally mounted at the air inlet end of the condenser, the heater corresponding to Figure 3 The electric heating device 7 in the whole air-conditioning system includes: a compressor 1, a variable frequency drive 2, a central controller 3, a throttling device 4, a filter 5, an outdoor environment temperature sensing package 6, an electric heating device 7, an adjustable speed condensing fan 8, a condenser 9, an exhaust temperature sensing package 10, a high pressure sensor 11, a low pressure sensor 12, an evaporator 13, an auxiliary electric heater 14, an evaporating fan 15, an inner pipe temperature sensing package 16, a return air temperature sensing package 17, etc.

[0048] The air conditioning system of this embodiment adds a set of heaters at the front end of the condenser along the direction of outdoor air flow to increase the temperature of the air entering the condenser, thereby artificially creating a higher ambient temperature for it, so that the air conditioning can operate above the minimum cooling temperature.

[0049] In one implementation of the present embodiment, using the heater to increase the intake air temperature of the condenser includes: determining the minimum heat exchange air volume of the condensing fan of the condenser, and determining the target temperature set by the air conditioner, wherein the target temperature is the lowest ambient temperature required for cooling, and the target temperature is lower than the lowest cooling temperature; calculating the heating power of the heater based on the target temperature, the lowest cooling temperature, the ambient temperature, and the minimum heat exchange air volume; and operating the heater based on the heating power to increase the intake air temperature of the condenser.

[0050] Target temperature T xmin It is the lowest outdoor ambient temperature that needs cooling, which is the factory parameter of the air conditioner and is between -50℃ and -10℃. xmin <T nmin When the temperature of the air inlet of the condenser is increased, the heater is used to increase the air inlet temperature of the condenser.

[0051] Optionally, the condensing fan of the condenser is an adjustable speed condensing fan. According to the lower limit of the reliable operation range of the adjustable speed condensing fan, it can be determined that the adjustable speed condensing fan operates at the lowest reliable speed n. min Condensation heat exchange air volume during operation G min , minimum heat exchange air volume. When the condensing fan operates at the minimum heat exchange air volume, the air at the condenser inlet can achieve maximum efficiency in heat exchange.

[0052] By adopting the solution of this embodiment, by using the target temperature, the minimum cooling temperature, the ambient temperature, and the minimum heat exchange air volume to calculate the heating power of the heater, it is possible to ensure that the minimum heating power of the electric heating device is configured under the premise that the air-conditioning compressor can reliably operate the cooling, avoid energy waste due to excessive heating power, save energy of the heater, and reduce electrical safety risks.

[0053] In one example, calculating the heating power of the heater according to the target temperature, the minimum cooling temperature, the ambient temperature, and the minimum heat exchange air volume includes:

[0054] S11, calculating the minimum configured heating capacity of the heater using the target temperature, the minimum cooling temperature, and the minimum heat exchange air volume;

[0055] Optionally, using the target temperature, the minimum cooling temperature, and the minimum heat exchange air volume to calculate the minimum configured heating amount of the heater includes: using the following formula to calculate the minimum configured heating amount Q of the heater: min :Q min =G min ×c p ×(T nmin -T xmin ) ; where Txmin is the target temperature, T nmin is the minimum refrigeration temperature, G min is the minimum heat exchange air volume, c p is the specific heat capacity of air, with the unit of kJ / (kg / ℃).

[0056] According to the minimum cooling temperature T required by the air conditioning unit xmin The demand is increased to the minimum refrigeration temperature T that can be achieved by the corresponding refrigerant nmin Based on the energy conservation formula, the above formula can be used to accurately calculate the minimum configuration heating capacity Q of the heater min .

[0057] By adopting the solution of this embodiment, the minimum configured heating amount of the heater when the heater heats the ambient temperature can be accurately calculated through the principle of energy conservation, thereby avoiding energy waste.

[0058] S12, calculating the heating power of the heater by using the minimum configured heating amount, the target temperature, the minimum cooling temperature, and the ambient temperature.

[0059] Optionally, using the minimum configured heating amount, the target temperature, the minimum cooling temperature, and the ambient temperature to calculate the heating power of the heater includes: using the following formula to calculate the heating power Q of the heater: Q=(T nmin -T) / (T nmin -T xmin )×Q min ; Among them, Q min is the minimum configuration heating amount, T xmin is the target temperature, T nmin is the minimum cooling temperature, and T is the ambient temperature.

[0060] By adopting the above scheme, a scheme of compensating heating of the ambient temperature with a heater is realized. When the ambient temperature is lower than the lowest refrigeration temperature that can achieve refrigeration, the heat that increases the temperature entering the condenser is balanced with the heat output by the heater, so that the electric heating device can output the minimum capacity as much as possible, saving energy consumption of the air conditioner in all temperature ranges and improving electrical safety.

[0061] In this embodiment, if the ambient temperature is lower than the minimum cooling temperature of the refrigerant of the air conditioner, it also includes: controlling the condensing fan of the condenser to run at a constant minimum speed, and adjusting the throttling device of the air conditioner to the maximum allowable opening of the current outdoor ambient temperature.

[0062] Optionally, the throttling device of the air conditioner is used to throttle and reduce the pressure of the high-pressure liquid from the condenser to a low-pressure liquid, and at the same time adjust the refrigerant flow entering the evaporator. When the throttling device is adjusted to the maximum opening, the refrigerant has a maximum flow in the refrigeration pipeline. The throttling device can be but is not limited to: a capillary tube, a throttling short tube, a thermal expansion valve, an electronic expansion valve, a float valve, a throttling orifice plate, a manual expansion valve, etc.

[0063] The opening of the throttling device is set according to different outdoor ambient temperature ranges. For example, when the ambient temperature needs to meet the requirement of reliable cooling at -40℃~65℃, 6~8 ranges with different temperature differences are generally set. Each range has an allowable maximum opening and minimum opening. The maximum opening is the opening for the maximum refrigerant flow when the maximum cooling capacity requirement of the range is met, and the minimum opening is the opening for the minimum refrigerant flow when the minimum cooling capacity requirement of the range is met.

[0064] While controlling the heater to heat the air at the condenser inlet, the adjustable speed condensing fan is simultaneously turned on. min Constant operation, control the evaporating fan to start and run, and open the throttling device to the maximum opening.

[0065] When the ambient temperature is lower than the lowest cooling temperature of the refrigerant of the air conditioner, the condensing fan is adjusted to the minimum speed to achieve maximum heat exchange. At the same time, the throttling device of the air conditioner is adjusted to the maximum opening to increase the flow rate of the refrigerant in the refrigeration flow path of the air conditioner, thereby increasing the cooling capacity of the evaporator, improving the refrigeration effect and the cooling speed.

[0066] In another implementation scenario of this embodiment, after determining whether the ambient temperature is lower than the minimum cooling temperature of the refrigerant of the air conditioner, it also includes: if the ambient temperature is higher than or equal to the minimum cooling temperature of the refrigerant of the air conditioner, obtaining the lower limit condensing temperature and the real-time condensing temperature of the condenser; calculating the temperature difference between the lower limit condensing temperature and the real-time condensing temperature; and adjusting the speed of the condensing fan of the condenser based on the temperature difference.

[0067] In this implementation scenario, the heater is not put into operation, and the air conditioner can achieve cooling normally. nmin The output speed of the adjustable speed condensing fan is based on the lower limit condensing temperature Tc at which the compressor can operate stably. min and the real-time condensing temperature Tc, in the process of adjusting the speed of the condensing fan of the condenser based on the temperature difference, including: when Tc<Tc min +Δt, after the interval adjustment period (t minutes), reduce the condensing fan speed by 1%; when Tc min +ΔT≤Tc<Tc 恒定 When Tc恒定 ≤Tc, the condensing fan speed is increased by 1% every t minutes. The value of t is based on experience and can be selected in the range of 0.5~10. ΔT is the temperature difference margin (set temperature deviation). Tc 恒定 A higher settable temperature value, greater than Tc min +ΔT is the factory setting parameter. The manufacturer sets it based on comprehensive factors such as the refrigeration system energy efficiency, power consumption, economy, and the upper limit of the compressor operating condensing temperature. It can be set between 40 and 60°C.

[0068] By adjusting the output speed of the adjustable-speed condensing fan, the refrigeration system can be controlled to operate stably and reliably, ensuring the refrigeration accuracy of the air conditioner.

[0069] Figure 4 is a flow chart of air conditioning refrigeration in an embodiment of the present invention, including: after the air conditioner is turned on, detecting the ambient temperature T, comparing the ambient temperature T with the minimum refrigeration temperature T nmin ; When T ≥ T nmin When comparing Tc and Tc min +Δt, and adjust the speed of the condenser fan based on the comparison result, when T<T nmin When the heater is controlled to heat according to the calculated heating power Q, the condensing fan is controlled to heat according to the minimum speed n min Constant operation, with the throttling device adjusted to the preset opening.

[0070] By adopting the solution of this embodiment, a heating device is added at the front end of the condenser along the direction of air flow, so as to increase the temperature of the air entering the condenser, thereby artificially creating a higher ambient temperature for the air so that the air conditioner can operate above the lower limit temperature. The thermal capacity of the heating device is configured and the start and stop timing of the electric heating device is determined according to the thermal properties of the refrigerant, the adjustment capacity of the adjustable speed condensing fan and the operating range of the compressor, so as to ensure that the minimum capacity of the electric heating device is configured under the premise that the compressor can operate reliably, save energy and reduce electrical safety risks.

[0071] By adding an electric heater and control algorithm to the original air conditioner without changing the structure space and controller hardware, the demand for reliable cooling in an ultra-wide ambient temperature of -45℃~65℃ can be achieved. There is no need to change the structure space and interface size of the air conditioner, and it has high adaptability.

[0072] After the implementation of the above scheme and the operation of logical control, reliable cooling in an ultra-wide ambient temperature range of -45℃~65℃ is achieved with only a single refrigerant and in the structural space of the original air conditioner; at the same time, the lowest achievable cooling temperature is configured to be as low as possible, and the electric heating device does not need to be turned on to the greatest extent possible; when the ambient temperature is lower than the lowest achievable cooling temperature, the electric heating device is allowed to output the minimum capacity as much as possible; the energy consumption of the air conditioner in the entire temperature range is saved, and electrical safety is improved; compared with conventional air-liquid cooling + compressor refrigeration or fluorine pump + compressor refrigeration, the refrigeration system, control logic, number of components, etc. are greatly simplified, and the reliability of the air conditioner is greatly improved.

[0073] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0074] Example 2

[0075] In this embodiment, an air conditioner is also provided, and the device is used to implement the above-mentioned embodiment and preferred implementation mode, and the description has been made no further. As used below, the term "module" can implement a combination of software and hardware of the reservation function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, can also be conceived.

[0076] Figure 5 is a structural block diagram of an air conditioning system according to an embodiment of the present invention, such as Figure 5 As shown, it includes: a heater 50 and an air conditioner 52, the air conditioner includes a controller, the controller is also connected to the heater, and the controller includes:

[0077] A detection module 520, for detecting the ambient temperature of the air conditioner before the heater is operated, wherein the heater is externally arranged at the air inlet end of the condenser of the air conditioner;

[0078] A judgment module 522 is used to judge whether the ambient temperature is lower than the lowest cooling temperature of the refrigerant of the air conditioner;

[0079] The heating module 524 is used to increase the intake air temperature of the condenser by using the heater if the ambient temperature is lower than the lowest cooling temperature of the refrigerant of the air conditioner.

[0080] Optionally, the heating module includes: a determination unit for determining a minimum heat exchange air volume of the condensing fan of the condenser, and determining a target temperature set for the air conditioner, wherein the target temperature is the minimum ambient temperature required for cooling, and the target temperature is lower than the minimum cooling temperature; a calculation unit for calculating the heating power of the heater based on the target temperature, the minimum cooling temperature, the ambient temperature, and the minimum heat exchange air volume; and an operation unit for operating the heater based on the heating power to increase the intake air temperature of the condenser.

[0081] Optionally, the calculation unit includes: a first calculation subunit, used to calculate the minimum configured heating amount of the heater using the target temperature, the minimum cooling temperature, and the minimum heat exchange air volume; and a second calculation subunit, used to calculate the heating power of the heater using the minimum configured heating amount, the target temperature, the minimum cooling temperature, and the ambient temperature.

[0082] Optionally, the second calculation subunit is further used to calculate the heating power Q of the heater using the following formula: Q=(T nmin -T) / (T nmin -T xmin )×Q min ; Among them, Q min is the minimum configuration heating amount, T xmin is the target temperature, T nmin is the minimum cooling temperature, and T is the ambient temperature.

[0083] Optionally, the first calculation subunit is further used to calculate the minimum configuration heating amount Q of the heater using the following formula: min :Q min = G min ×c p ×(T nmin -T xmin ) ; where T xmin is the target temperature, T nmin is the minimum refrigeration temperature, G min is the minimum heat exchange air volume, c p is the specific heat capacity of air.

[0084] Optionally, the device also includes: an acquisition module, used to obtain the lower limit condensing temperature and real-time condensing temperature of the condenser after the judgment module determines whether the ambient temperature is lower than the lowest refrigeration temperature of the refrigerant of the air conditioner, if the ambient temperature is higher than or equal to the lowest refrigeration temperature of the refrigerant of the air conditioner; a calculation module, used to calculate the temperature difference between the lower limit condensing temperature and the real-time condensing temperature; and an adjustment module, used to adjust the speed of the condensing fan of the condenser based on the temperature difference.

[0085] Optionally, if the ambient temperature is lower than the minimum cooling temperature of the refrigerant of the air conditioner, the device also includes: a control module, used to control the condensing fan of the condenser to run at a constant minimum speed, and adjust the throttling device of the air conditioner to the maximum allowable opening of the current outdoor ambient temperature.

[0086] It should be noted that the above modules can be implemented by software or hardware. For the latter, it can be implemented in the following ways, but not limited to: the above modules are all located in the same processor; or the above modules are located in different processors in any combination.

[0087] Example 3

[0088] An embodiment of the present invention further provides a storage medium, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when running.

[0089] Optionally, in this embodiment, the above storage medium may be configured to store a computer program for executing:

[0090] S1, detecting the ambient temperature of the air conditioner before the heater is operated, wherein the heater is externally arranged at the air inlet end of the condenser of the air conditioner;

[0091] S2, determining whether the ambient temperature is lower than the lowest cooling temperature of the refrigerant of the air conditioner;

[0092] S3: If the ambient temperature is lower than the lowest cooling temperature of the refrigerant of the air conditioner, the heater is used to increase the intake air temperature of the condenser.

[0093] Optionally, in this embodiment, the above-mentioned storage medium may include but is not limited to: a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and other media that can store computer programs.

[0094] An embodiment of the present invention further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0095] Optionally, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0096] Optionally, in this embodiment, the processor may be configured to perform the following steps through a computer program:

[0097] S1, detecting the ambient temperature of the air conditioner before the heater is operated, wherein the heater is externally arranged at the air inlet end of the condenser of the air conditioner;

[0098] S2, determining whether the ambient temperature is lower than the lowest cooling temperature of the refrigerant of the air conditioner;

[0099] S3: If the ambient temperature is lower than the lowest cooling temperature of the refrigerant of the air conditioner, the heater is used to increase the intake air temperature of the condenser.

[0100] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation modes, and this embodiment will not be described in detail here.

[0101] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0102] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0103] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0104] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0105] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0106] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, controller or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc., various media that can store program codes.

[0107] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for controlling an air conditioner, characterized in that: include: Detecting the ambient temperature of the air conditioner before the heater is operated, wherein the heater is externally arranged at the air inlet end of the condenser of the air conditioner; Determine whether the ambient temperature is lower than the minimum refrigeration temperature of the refrigerant of the air conditioner, the minimum refrigeration temperature is equal to the boiling point temperature of the refrigerant + a safety margin, and the safety margin is greater than 0°C; If the ambient temperature is lower than the lowest cooling temperature of the refrigerant of the air conditioner, the heater is used to increase the air intake temperature of the condenser, the condensing fan of the condenser is controlled to run at a constant minimum speed, and the throttling device of the air conditioner is adjusted to the maximum allowable opening of the current outdoor ambient temperature; Using the heater to increase the intake air temperature of the condenser includes: Determine the minimum heat exchange air volume of the condensing fan of the condenser, and determine the target temperature set by the air conditioner, wherein the target temperature is the lowest ambient temperature required for cooling, and the target temperature is lower than the lowest cooling temperature; Calculating the heating power of the heater according to the target temperature, the minimum cooling temperature, the ambient temperature, and the minimum heat exchange air volume; operating the heater based on the heating power to increase an intake air temperature of the condenser; Calculating the heating power of the heater according to the target temperature, the minimum cooling temperature, the ambient temperature, and the minimum heat exchange air volume includes: Calculating the minimum configured heating capacity of the heater using the target temperature, the minimum cooling temperature, and the minimum heat exchange air volume; Calculating the heating power of the heater by using the minimum configured heating amount, the target temperature, the minimum cooling temperature, and the ambient temperature; Calculating the heating power of the heater using the minimum configured heating amount, the target temperature, the minimum cooling temperature, and the ambient temperature includes: The heating power Q of the heater is calculated using the following formula: Q=(T nmin -T) / (T nmin -T xmin )×Q min ; Among them, Q min is the minimum configuration heating amount, T xmin is the target temperature, T nmin is the minimum refrigeration temperature, and T is the ambient temperature; Calculating the minimum configured heating capacity of the heater by using the target temperature, the minimum cooling temperature, and the minimum heat exchange air volume includes: The minimum configuration heating capacity Q of the heater is calculated using the following formula: min : Q min = G min ×c p ×(T nmin - T xmin ) ; Among them, T xmin is the target temperature, T nmin is the minimum refrigeration temperature, G min is the minimum heat exchange air volume, c p is the specific heat capacity of air.

2. The method according to claim 1, characterized in that After determining whether the ambient temperature is lower than the lowest cooling temperature of the refrigerant of the air conditioner, the method further includes: If the ambient temperature is higher than or equal to the lowest refrigeration temperature of the refrigerant of the air conditioner, obtaining the lower limit condensing temperature and the real-time condensing temperature of the condenser; calculating a temperature difference between the lower limit condensing temperature and the real-time condensing temperature; The rotation speed of the condensing fan of the condenser is adjusted based on the temperature difference.

3. An air conditioning system, characterized in that: include: A heater and an air conditioner, the air conditioner comprising a controller, the controller comprising: A detection module, used to detect the ambient temperature of the air conditioner before the heater is operated, wherein the heater is externally arranged at the air inlet end of the condenser of the air conditioner; A judgment module, used to judge whether the ambient temperature is lower than the lowest refrigeration temperature of the refrigerant of the air conditioner, the lowest refrigeration temperature is equal to the boiling point temperature of the refrigerant + a safety margin, and the safety margin is greater than 0; A heating module, used to increase the intake air temperature of the condenser by using the heater if the ambient temperature is lower than the lowest cooling temperature of the refrigerant of the air conditioner; A control module, used to control the condensing fan of the condenser to run at a constant minimum speed, and adjust the throttling device of the air conditioner to a maximum allowable opening of the current outdoor ambient temperature; The heating module includes: a determination unit, used to determine the minimum heat exchange air volume of the condensing fan of the condenser, and to determine the target temperature set by the air conditioner, wherein the target temperature is the lowest ambient temperature required for cooling, and the target temperature is lower than the lowest cooling temperature; a calculation unit, used to calculate the heating power of the heater according to the target temperature, the lowest cooling temperature, the ambient temperature, and the minimum heat exchange air volume; an operation unit, used to operate the heater based on the heating power to increase the intake air temperature of the condenser; The calculation unit includes: a first calculation subunit, used to calculate the minimum configuration heating amount of the heater by using the target temperature, the minimum cooling temperature, and the minimum heat exchange air volume; a second calculation subunit, used to calculate the heating power of the heater by using the minimum configuration heating amount, the target temperature, the minimum cooling temperature, and the ambient temperature; The second calculation subunit is further used to calculate the heating power Q of the heater using the following formula: Q=(Tnmin-T) / (Tnmin-Txmin)×Qmin; wherein Qmin is the minimum configured heating amount, Txmin is the target temperature, Tnmin is the minimum cooling temperature, and T is the ambient temperature; The first calculation subunit is also used to calculate the minimum configured heating capacity Qmin of the heater using the following formula: Qmin= Gmin×cp×(Tnmin-Txmin); wherein Txmin is the target temperature, Tnmin is the minimum cooling temperature, Gmin is the minimum heat exchange air volume, and cp is the specific heat capacity of air.

4. A storage medium, characterized in that: The storage medium stores a computer program, wherein the computer program is configured to execute the steps of the air conditioner control method according to any one of claims 1 to 2 when running.

5. An electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein: The processor, the communication interface, and the memory communicate with each other via a communication bus; wherein: Memory, used to store computer programs; A processor, configured to execute the steps of the air conditioner control method according to any one of claims 1 to 2 by running a program stored in a memory.

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