Anti-freezing control method, system and equipment for air conditioning system, medium and program product

Abstract

The invention relates to the field of computers, in particular to an anti-freezing control method for an air conditioning system, the system comprises an outdoor unit and an indoor unit, the outdoor unit comprises a compressor, and the indoor unit comprises a water pump, a heater, a floor heating module and an electronic expansion valve. Starting the compressor on the basis of the first preset condition, enabling the compressor to operate at a first preset frequency until the water temperature reaches a preset threshold value within first preset time, and releasing the anti-freezing mode; in a heating state, the compressor operates at a second preset frequency; and in the refrigeration state, the opening degree of the electronic expansion valve is initialized to prevent refrigerant leakage, if the water temperature is continuously reduced, a first error reporting signal is output based on a third condition, a second error reporting signal is output based on a fourth condition, the compressor is closed, and the anti-freezing mode is removed until the error reporting signals are removed. The invention further provides an air conditioning system, equipment, a medium and a program product.

Description

Technical Field

[0001] The present invention relates to the field of computers, and in particular to an air conditioning system antifreeze control method, an air conditioning system, equipment, a medium and a program product. Background Art

[0002] At present, most of the multi-air conditioning systems on the market have anti-freeze protection control. Temperature sensors for detecting refrigerant temperature and water temperature are installed in the air conditioning system module. These sensors are used to detect whether the water temperature in the system is low to determine whether there is a risk of freezing. If the water temperature is low, the air conditioning system module will automatically turn on the heating mode, that is, start the compressor for anti-freeze.

[0003] However, since the conventional compressor antifreeze control will not make corresponding antifreeze control actions according to the operating conditions of the air-conditioning system at this time when it is started, it will often only turn on the air-conditioning system module for heating and antifreeze when the water temperature is low, which will cause the user's original operating mode to be forced to switch to the antifreeze mode, affecting the user experience, without specificity, and with a low fault tolerance rate.

[0004] In actual use, antifreeze control needs to make different antifreeze control actions according to different system operating conditions. Some antifreeze solutions in the industry have advantages and disadvantages and cannot respond to various situations intelligently, which not only affects the system operation effect, but also affects the user experience and increases the risk of user complaints. Summary of the invention

[0005] The purpose of the present invention is to provide an air-conditioning system antifreeze control method, air-conditioning system, equipment, medium and program product, which can realize intelligent multi-mode antifreeze control by identifying the operating mode of the air-conditioning system at this time to determine whether it is necessary to turn on the floor heating module for heating and whether to execute other controls for antifreeze.

[0006] The embodiment of the present invention discloses an antifreeze control method for an air conditioning system, wherein the system comprises an outdoor unit and an indoor unit, wherein the outdoor unit comprises a compressor, and the indoor unit comprises a water pump, a heater, a floor heating module, and an electronic expansion valve, and the method comprises:

[0007] Entering the antifreeze mode based on the first predetermined condition and the second predetermined condition, selecting one of the current system being in a standby state, a heating state or a cooling state according to the operating states of the outdoor unit and the indoor unit;

[0008] When the system is in the standby state, the compressor is turned on based on the first predetermined condition, and the compressor runs at a first predetermined frequency until the water temperature reaches a predetermined threshold within a first predetermined time, and the antifreeze mode is released;

[0009] When the system is in the heating state, the compressor is turned on based on the first predetermined condition, and the compressor operates at a second predetermined frequency until the water temperature reaches the predetermined threshold within the first predetermined time, and the antifreeze mode is released;

[0010] When the system is in the refrigeration state, the opening of the electronic expansion valve is initialized based on the second predetermined condition, the first error signal is output based on the third predetermined condition, and the second error signal is output based on the fourth predetermined condition to shut down the compressor until the antifreeze mode is released after the first error signal and the second error signal are released.

[0011] Optionally, the operating state includes:

[0012] When the operation state of the outdoor unit is stopped and the operation state of the indoor unit is stopped, the current system is in the standby state;

[0013] When the operating state of the outdoor unit is heating and the operating state of the indoor unit is stopped, the current system is in the heating state;

[0014] When the operating state of the outdoor unit is cooling and the operating state of the indoor unit is stopped, the current system is in the cooling state.

[0015] Optionally, the first predetermined condition is that the minimum value of the inlet water temperature of the floor heating module and / or the outlet water temperature of the floor heating module is less than or equal to a first parameter.

[0016] Optionally, the second predetermined condition is that the minimum value of the inlet water temperature of the floor heating module and / or the outlet water temperature of the floor heating module is less than or equal to a second parameter for a second predetermined time, and the minimum value of the inlet refrigerant temperature of the floor heating module during cooling and / or the outlet refrigerant temperature of the floor heating module during cooling is less than or equal to the first parameter.

[0017] Optionally, the third condition is that the minimum value of the inlet water temperature of the floor heating module and / or the outlet water temperature of the floor heating module is less than or equal to the third parameter and lasts for a third predetermined time.

[0018] Optionally, the fourth condition is that the minimum value of the inlet water temperature of the floor heating module and / or the outlet water temperature of the floor heating module is less than or equal to the first parameter and lasts for a fourth predetermined time.

[0019] Optionally, initializing the opening of the electronic expansion valve includes reducing the PMV opening from 30 pls to 15 pls to prevent refrigerant leakage of the floor heating module.

[0020] Optionally, if the minimum value of the inlet water temperature of the floor heating module and / or the outlet water temperature of the floor heating module is less than or equal to the third parameter for the third predetermined time, a first error signal is output.

[0021] Optionally, if the minimum value of the inlet water temperature of the floor heating module and / or the outlet water temperature of the floor heating module continues to be less than or equal to the first parameter for the fourth predetermined time, the second error signal is output.

[0022] Optionally, the first predetermined frequency is lower than the second predetermined frequency.

[0023] Optionally, the third predetermined time is greater than the second predetermined time.

[0024] An embodiment of the present invention discloses an electronic device, the device comprising a memory storing computer executable instructions and a processor, the processor being configured to execute the instructions to implement the air conditioning system antifreeze control method.

[0025] An embodiment of the present invention discloses a computer-readable storage medium, in which at least one computer instruction is stored. The at least one instruction is loaded and executed by a processor to implement the air conditioning system antifreeze control method.

[0026] The embodiment of the present invention discloses a computer program product, which includes computer instructions. When the computer instructions are executed, the air conditioning system antifreeze control method is implemented.

[0027] Compared with the prior art, the main difference and effect of the implementation method of the present invention is that the scheme of the present invention turns on the water pump and the heater to enter the antifreeze mode when the water temperature is low. If the water temperature continues to decrease at this time, the operating state of the outdoor unit is identified and the corresponding advanced antifreeze protection control is made. The operating state is divided into standby state, heating state and cooling state. In the standby state and heating state, when the water temperature is low to a certain extent, the floor heating module will be forced to heat, and the compressor of the outdoor unit will be turned on. If the water temperature is always very low after the compressor is turned on, the antifreeze mode will be forced to turn on. The compressor will be operated at a low frequency in the standby state, and the operating frequency of the compressor will be increased in the heating state. When the water temperature rises and reaches the release condition, the heating antifreeze will be terminated. In the cooling state, if the water temperature is low, the water pump and the heater are turned on for antifreeze, and the floor heating antifreeze heating is turned on. Since cooling takes precedence over floor heating antifreeze, the floor heating antifreeze is invalid at this time, and an error code is added to deal with the situation where the water temperature continues to be low. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a flow chart of an air conditioning system antifreeze control method according to an embodiment of the present invention;

[0029] Figure 2 is a flow chart of an antifreeze control logic according to an embodiment of the present invention;

[0030] Figure 3 is a hardware structure block diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings. It will be appreciated that the specific embodiments described herein are intended only to explain the present invention, rather than to limit the present invention. In addition, for ease of description, only some, but not all, structures or processes related to the present invention are shown in the accompanying drawings. It should be noted that in this specification, similar reference numerals and letters represent similar items in the following drawings.

[0032] It should be understood that although the terms "first", "second", etc. may be used herein to describe various features, these features should not be limited by these terms. These terms are used only to distinguish and should not be understood as indicating or implying relative importance. For example, a first feature may be referred to as a second feature, and similarly a second feature may be referred to as a first feature without departing from the scope of the exemplary embodiments.

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] The air conditioning system includes an outdoor unit and an indoor unit. The outdoor unit includes a compressor, and the indoor unit includes a water pump, a heater, a floor heating module and an electronic expansion valve. The solution of the present invention turns on the water pump and the heater to enter the antifreeze mode when the water temperature is low. At this time, if the water temperature continues to decrease, the operating state of the outdoor unit is identified at this time and the corresponding advanced antifreeze protection control is performed. The operating state is divided into a standby state, a heating state and a cooling state. Among them, as an implementation method, when the operating state of the outdoor unit is stopped and the operating state of the indoor unit is stopped, the current system is in a standby state; when the operating state of the outdoor unit is heating and the operating state of the indoor unit is stopped, the current system is in a heating state; when the operating state of the outdoor unit is cooling and the operating state of the indoor unit is stopped, the current system is in a cooling state.

[0035] Figure 1 The figure is a flow chart of an air conditioning system antifreeze control method according to an embodiment of the present invention.

[0036] The air conditioning system antifreeze control method includes step S100, step S200, step S300 and step S400.

[0037] Step S100: Entering the antifreeze mode based on the first predetermined condition and the second predetermined condition, and selecting one of the current system being in the standby state, the heating state or the cooling state according to the operating states of the outdoor unit and the indoor unit.

[0038] In combination with step S200, as an implementation mode, the first predetermined condition is that the minimum value of the floor heating module inlet water temperature and / or the floor heating module outlet water temperature is less than or equal to the first parameter, and the first predetermined condition is applicable to the standby state and the heating state.

[0039] In combination with step S300, as an implementation mode, the second predetermined condition is that the minimum value of the inlet water temperature of the floor heating module and / or the outlet water temperature of the floor heating module is less than or equal to the second parameter for a second predetermined time, and the minimum value of the inlet refrigerant temperature of the floor heating module during cooling and / or the outlet refrigerant temperature of the floor heating module during cooling is less than or equal to the first parameter, and the second predetermined condition applies to the cooling state.

[0040] In one example, when the air-conditioning system is in standby mode, the indoor floor heating module and the outdoor air conditioner both stop running. When the minimum value of the floor heating module inlet water temperature and / or the floor heating module outlet water temperature is lower than the first parameter, the air-conditioning system enters the compressor antifreeze mode and turns on the compressor.

[0041] In another example, in the external cooling mode, since cooling takes precedence over the heating of the floor heating module, the forced activation of the antifreeze module in the cooling mode is ineffective. In step S300, a new low water temperature error control is introduced, which is combined with the original low water temperature error to achieve a multiple freezing protection effect.

[0042] Step S200: When the air conditioning system is in standby mode, the compressor is turned on based on a first predetermined condition, and the compressor runs at a first predetermined frequency until the water temperature reaches a predetermined threshold within a first predetermined time, and the antifreeze mode is released.

[0043] In one example, when the air-conditioning system is in standby mode, both the indoor floor heating module and the outdoor air-conditioning stop running. When the minimum value of the floor heating module inlet water temperature and / or the floor heating module outlet water temperature is lower than the first parameter, the air-conditioning system enters the antifreeze mode and turns on the compressor. At this time, the compressor starts and runs at a first frequency, wherein the first frequency is a lower operating frequency. When the water temperature rises to a predetermined threshold within a first predetermined time, the antifreeze control is released and the floor heating module returns to the standby mode.

[0044] Step S300: When the air-conditioning system is in the heating state, the compressor is turned on based on the first predetermined condition, and the compressor runs at a second predetermined frequency until the water temperature reaches a predetermined threshold within a first predetermined time, and the antifreeze mode is released.

[0045] As an implementation manner, the first predetermined frequency is lower than the second predetermined frequency.

[0046] In one example, when the air-conditioning system is in standby mode, the indoor floor heating module stops running, and the outdoor air conditioner is heating. When the minimum value of the floor heating module inlet water temperature and / or the floor heating module outlet water temperature is lower than the first parameter, the air-conditioning system enters antifreeze mode and turns on the compressor. At this time, the compressor starts and runs at a second frequency. The second frequency is a higher frequency, higher than the first frequency, and the first frequency is a lower frequency. When the water temperature rises to a predetermined threshold within the first predetermined time, the antifreeze control is released and the floor heating module returns to standby mode.

[0047] Step S400: When the system is in a cooling state, the opening of the electronic expansion valve is initialized based on the second predetermined condition, the first error signal is output based on the third predetermined condition, and the second error signal is output based on the fourth predetermined condition, and the compressor is turned off based on the first error signal and the second error signal, until the antifreeze mode is released after the first error signal and the second error signal are released.

[0048] As an implementation manner, the third condition is that the minimum value of the inlet water temperature of the floor heating module and / or the outlet water temperature of the floor heating module is less than or equal to a third parameter and lasts for a third predetermined time.

[0049] As an implementation manner, the fourth condition is that the minimum value of the inlet water temperature of the floor heating module and / or the outlet water temperature of the floor heating module is less than or equal to the first parameter and lasts for a fourth predetermined time.

[0050] When the air-conditioning system is in cooling state, since cooling takes precedence over heating of the floor heating module, forcibly starting the antifreeze module in cooling mode is ineffective. Therefore, the opening of the electronic expansion valve is initialized to prevent refrigerant leakage and lower the water temperature, and an error is introduced to solve the above problem.

[0051] If the water temperature or refrigerant temperature continues to drop after initialization, low water temperature detection will continue, and abnormal water temperature errors and freezing prevention errors will be reported.

[0052] As an implementation mode, initializing the electronic expansion valve opening includes reducing the PMV opening from 30 pls to 15 pls to prevent refrigerant leakage of the floor heating module.

[0053] As an implementation manner, if the minimum value of the inlet water temperature of the floor heating module and / or the outlet water temperature of the floor heating module is less than or equal to a third parameter for a third predetermined time, a first error signal is output.

[0054] As an implementation manner, if the minimum value of the inlet water temperature of the floor heating module and / or the outlet water temperature of the floor heating module is less than or equal to the first parameter for a fourth predetermined time, a second error signal is output.

[0055] As an implementation manner, the third predetermined time is greater than the second predetermined time.

[0056] In one example, the third predetermined time includes the condition of the second predetermined time required for initializing the opening of the electronic expansion valve, and can determine again whether the water temperature continues to be low after the opening of the electronic expansion valve is initialized. If it continues to be low, the first error signal and the second error signal are output.

[0057] Figure 2 is a flow chart of an antifreeze control logic according to an embodiment of the present invention.

[0058] refer to Figure 2 In the flowchart of an embodiment, when the water temperature is lower than a certain temperature, the water pump and the heater are turned on to enter the antifreeze mode. If the water temperature continues to drop, the mode of the outdoor unit is identified and the corresponding antifreeze protection control is performed. In order to facilitate the understanding of the scheme of the present invention, the following specific data information is only used as a special implementation method of the scheme of the present invention, which is based on achieving the purpose and effect of the present invention and should not be used as a limiting condition.

[0059] In one example, when the outdoor unit is in standby mode, if Min (TWI, TWO) ≤ 2°C (4°C), the floor heating module will turn on heating to prevent freezing. The setting of 2 degrees is to allow the plate heat exchanger to turn on the antifreeze mode when it is just about to freeze, effectively protecting the plate heat exchanger while reducing power consumption. This temperature can be changed to 4 degrees for special on-site correspondence. After turning on the antifreeze mode, the compressor will start, and the floor heating module will give a low-frequency operation command to run the compressor. Low-frequency operation is sufficient to heat the water pipes and also reduce noise. When the water temperature rises to T1 temperature and lasts for t1 time, the antifreeze mode is released and the compressor stops.

[0060] In one example, when the external machine is in heating state, if Min (TWI, TWO) ≤ 2°C (4°C), the floor heating module will turn on heating for antifreeze. The setting of 2 degrees is to allow the plate heat exchanger to turn on heating for antifreeze when it is just about to freeze, which effectively protects the plate heat exchanger and reduces power consumption. This temperature can be changed to 4 degrees for special on-site correspondence. The remote control is not turned on during antifreeze, and the antifreeze heating and normal heating can be distinguished to avoid functional conflicts and will not affect the user's normal heating needs. After the antifreeze mode is turned on, the compressor will increase the operating frequency and the antifreeze time will start counting. When the water temperature rises to T1 temperature and lasts for t1 time, the antifreeze mode is released, the compressor frequency is reduced, and the original heating operation mode continues.

[0061] In one example, when the external machine is in cooling state, if Min(TWI, TWO)≤5℃ for 5 minutes, and Min(TC1, TCJ)≤2℃, the opening of the electronic expansion valve of the floor heating module is initialized, and the opening is closed from 30pls to 15pls, which can prevent the water temperature from dropping due to refrigerant leakage from the valve. After the opening of the electronic expansion valve is initialized, if Min(TWI, TWO)≤3℃ for 6 minutes, a low water temperature signal is output. The parameter setting is based on 3℃ as the water temperature threshold of the forced antifreeze mode, and 6 minutes includes the 5-minute condition of the electronic expansion valve opening initialization. In this way, it can be determined again whether the water temperature continues to be low after the opening is initialized. If it continues to be low, a low water temperature signal is output. If Min(TWI, TWO)≤2℃ for 60 seconds, a thermal cross-freeze signal will be output. The parameter setting is based on the test that when the water temperature is lower than 2℃ for the shortest time of 40 seconds, a freezing flow abnormality will be output. Therefore, Min(TWI, TWO) is set to ≤2℃ for 60 seconds, and the thermal cross-freeze signal is used instead of the freezing flow abnormality signal to stop the compressor and effectively protect the plate exchanger.

[0062] According to some embodiments of the present invention, an electronic device is disclosed. The device includes a memory storing computer executable instructions and a processor. The processor is configured to execute the instructions to implement an air conditioning system antifreeze control method.

[0063] Figure 3 is a hardware structure block diagram of an electronic device according to an embodiment of the present invention.

[0064] like Figure 3 As shown, the electronic device 300 may include one or more processors 302, a system control logic 308 connected to at least one of the processors 302, a system memory 304 connected to the system control logic 308, a non-volatile memory (NVM) 306 connected to the system control logic 308, and a network interface 310 connected to the system control logic 308.

[0065] The processor 302 may include one or more single-core or multi-core processors. The processor 302 may include any combination of general-purpose processors and special-purpose processors (e.g., graphics processors, application processors, baseband processors, etc.). In an embodiment of the present invention, the processor 302 may be configured to execute the following operations: Figure 1 The antifreeze control method of the air conditioning system is shown.

[0066] In some embodiments, system control logic 308 may include any suitable interface controller to provide any suitable interface to at least one of processors 302 and / or any suitable device or component in communication with system control logic 308 .

[0067] In some embodiments, the system control logic 308 may include one or more memory controllers to provide an interface to the system memory 304. The system memory 304 may be used to load and store data and / or instructions. In some embodiments, the system memory 304 of the electronic device 300 may include any suitable volatile memory, such as a suitable dynamic random access memory (DRAM).

[0068] The non-volatile memory 306 may include one or more tangible, non-transitory computer-readable media for storing data and / or instructions. In some embodiments, the non-volatile memory 306 may include any suitable non-volatile memory such as flash memory and / or any suitable non-volatile storage device, such as at least one of a HDD (Hard Disk Drive, hard disk drive), a CD (Compact Disc, optical disk) drive, and a DVD (Digital Versatile Disc, digital versatile disc) drive.

[0069] The non-volatile memory 306 may include a portion of storage resources installed on a device of the electronic device 300, or it may be accessible by the device but not necessarily a portion of the device. For example, the non-volatile memory 306 may be accessed over a network via the network interface 310.

[0070] In particular, system memory 304 and non-volatile memory 306 may include a temporary copy and a permanent copy of instructions 320, respectively. Instructions 320 may include instructions that, when executed by at least one of processors 302, cause electronic device 300 to implement the following: Figure 1 Instructions of the air conditioning system antifreeze control method shown. In some embodiments, the instructions 320, hardware, firmware and / or software components thereof may be additionally / alternatively placed in the system control logic 308, the network interface 310 and / or the processor 302.

[0071] The network interface 310 may include a transceiver for providing a radio interface for the electronic device 300, thereby communicating with any other suitable device (e.g., a front-end module, an antenna, etc.) through one or more networks. In some embodiments, the network interface 310 may be integrated with other components of the electronic device 300. For example, the network interface 310 may be integrated with at least one of the processor 302, the system memory 304, the NVM 306, and a firmware device (not shown) having instructions. When at least one of the processors 302 executes the instructions, the electronic device 300 implements Figure 1 One or more of the various embodiments shown.

[0072] The network interface 310 may further include any suitable hardware and / or firmware to provide a multiple-input multiple-output radio interface. For example, the network interface 310 may be a network adapter, a wireless network adapter, a telephone modem, and / or a wireless modem.

[0073] In one embodiment, at least one of the processors 302 may be packaged together with one or more controllers for the system control logic 308 to form a system in package (SiP). In one embodiment, at least one of the processors 302 may be integrated on the same die with one or more controllers for the system control logic 308 to form a system on a chip (SoC).

[0074] The electronic device 300 may further include an input / output (I / O) device 312 connected to the system control logic 308. The I / O device 312 may include a user interface to enable a user to interact with the electronic device 300; the design of the peripheral component interface enables the peripheral components to interact with the electronic device 300. In some embodiments, the electronic device 300 further includes a sensor for determining at least one of an environmental condition and location information related to the electronic device 300.

[0075] In some embodiments, input / output (I / O) devices 312 may include, but are not limited to, a display (e.g., a liquid crystal display, a touch screen display, etc.), speakers, a microphone, one or more cameras (e.g., a still image camera and / or a video camera), a flashlight (e.g., an LED flash), and a keyboard.

[0076] In some embodiments, the peripheral component interface may include, but is not limited to, a non-volatile memory port, an audio jack, and a power interface.

[0077] It is to be understood that the structure illustrated in the embodiment of the present invention does not constitute a specific limitation on the electronic device 300. In other embodiments of the present application, the electronic device 300 may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0078] Program code can be applied to input instructions to perform the functions described in the present invention and generate output information. The output information can be applied to one or more output devices in a known manner. For the purposes of this application, a system for processing instructions including processor 302 includes any system having a processor such as a digital signal processor (DSP), a microcontroller, an application specific integrated circuit (ASIC), or a microprocessor.

[0079] Program code can be implemented with high-level programming language or object-oriented programming language to communicate with the processing system. When necessary, program code can also be implemented with assembly language or machine language. In fact, the mechanism described in the present invention is not limited to the scope of any specific programming language. In either case, the language can be a compiled language or an interpreted language.

[0080] According to one embodiment of the present invention, a computer-readable storage medium is further proposed, wherein at least one computer instruction is stored in the computer-readable storage medium, and the at least one instruction is loaded and executed by a processor to implement the aforementioned air conditioning system antifreeze control method.

[0081] According to one embodiment of the present invention, a computer program product is further proposed. The computer program product includes computer instructions. When the computer instructions are executed, the aforementioned air conditioning system antifreeze control method is implemented.

[0082] Illustrative embodiments of the present invention include, but are not limited to, an air conditioning system antifreeze control method, an air conditioning system, an apparatus, a medium, and a program product.

[0083] The various aspects of the illustrative embodiments will be described using terms commonly used by those skilled in the art to convey the essence of their work to other persons skilled in the art. However, it is apparent to those skilled in the art that some alternative embodiments may be implemented using some of the features described. For purposes of explanation, specific numbers and configurations are set forth so that the illustrative embodiments are more thoroughly understood. However, it is apparent to those skilled in the art that alternative embodiments may be implemented without the specific details. In some other cases, some well-known features are omitted or simplified herein to avoid obscuring the illustrative embodiments of the present invention.

[0084] In addition, various operations will be described as multiple separate operations in a manner that is most helpful for understanding the illustrative embodiments; however, the order of description should not be interpreted as implying that these operations must rely on the order of description, and many of the operations can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the operations can also be rearranged. When the described operations are completed, the process can be terminated, but can also have additional steps not included in the drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0085] References in the specification to "an example", "an example", "an embodiment", "an implementation", etc. indicate that the described embodiment may include a particular feature, structure, or property, but each embodiment may or may not necessarily include the particular feature, structure, or property. Moreover, these phrases are not necessarily directed to the same embodiment. In addition, when particular features are described in conjunction with a specific embodiment, the knowledge of those skilled in the art can affect the combination of these features with other embodiments, whether or not these embodiments are explicitly described.

[0086] Unless the context dictates otherwise, the terms "comprising," "having," and "including" are synonymous. The phrase "A and / or B" means "(A), (B), or (A and B)."

[0087] As used herein, the term "module" may refer to, be part of, or include: memory (shared, dedicated, or group) for running one or more software or firmware programs, application-specific integrated circuits (ASICs), electronic circuits and / or processors (shared, dedicated, or group), combinational logic circuits, and / or other suitable components that provide the described functionality.

[0088] In the accompanying drawings, some structural or method features may be shown in a specific arrangement and / or order. However, it should be understood that such a specific arrangement and / or order is not necessary. Instead, in some embodiments, these features may be described in a manner and / or order different from that shown in the illustrative drawings. In addition, the structural or method features included in a specific figure do not mean that all embodiments need to include such features. In some embodiments, these features may not be included or may be combined with other features.

[0089] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0090] Similarly, it should be understood that in order to streamline the present invention and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the intention that the claimed invention requires more features than those expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in less than all of the features of the individual embodiments previously disclosed. Therefore, the claims that follow the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the present invention.

[0091] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and in addition they may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0092] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

Claims

1. An antifreeze control method for an air conditioning system, the system comprising an outdoor unit and an indoor unit, the outdoor unit comprising a compressor, the indoor unit comprising a water pump, a heater, a floor heating module and an electronic expansion valve, characterized in that: The method comprises: Entering the antifreeze mode based on the first predetermined condition and the second predetermined condition, selecting one of the current system being in a standby state, a heating state or a cooling state according to the operating states of the outdoor unit and the indoor unit; When the system is in the standby state, the compressor is turned on based on the first predetermined condition, and the compressor runs at a first predetermined frequency until the water temperature reaches a predetermined threshold within a first predetermined time, and the antifreeze mode is released; When the system is in the heating state, the compressor is turned on based on the first predetermined condition, and the compressor operates at a second predetermined frequency until the water temperature reaches the predetermined threshold within the first predetermined time, and the antifreeze mode is released; When the system is in the refrigeration state, the opening of the electronic expansion valve is initialized based on the second predetermined condition, the first error signal is output based on the third predetermined condition, and the second error signal is output based on the fourth predetermined condition, and the compressor is turned off based on the first error signal and the second error signal until the antifreeze mode is released after the first error signal and the second error signal are released.

2. The air conditioning system antifreeze control method according to claim 1, characterized in that: The operating status includes: When the operation state of the outdoor unit is stopped and the operation state of the indoor unit is stopped, the current system is in the standby state; When the operating state of the outdoor unit is heating and the operating state of the indoor unit is stopped, the current system is in the heating state; When the operating state of the outdoor unit is cooling and the operating state of the indoor unit is stopped, the current system is in the cooling state.

3. The air conditioning system antifreeze control method according to claim 1, characterized in that: The first predetermined condition is that the minimum value of the inlet water temperature of the floor heating module and / or the outlet water temperature of the floor heating module is less than or equal to the first parameter.

4. The air conditioning system antifreeze control method according to claim 1 or 3, characterized in that: The second predetermined condition is that the minimum value of the inlet water temperature of the floor heating module and / or the outlet water temperature of the floor heating module is less than or equal to the second parameter for a second predetermined time, and the minimum value of the inlet refrigerant temperature of the floor heating module during cooling and / or the outlet refrigerant temperature of the floor heating module during cooling is less than or equal to the first parameter.

5. The air conditioning system antifreeze control method according to claim 1, characterized in that: The third condition is that the minimum value of the inlet water temperature of the floor heating module and / or the outlet water temperature of the floor heating module is less than or equal to the third parameter and lasts for a third predetermined time.

6. The air conditioning system antifreeze control method according to claim 1, characterized in that: The fourth condition is that the minimum value of the inlet water temperature of the floor heating module and / or the outlet water temperature of the floor heating module is less than or equal to the first parameter and lasts for a fourth predetermined time.

7. The air conditioning system antifreeze control method according to claim 1, characterized in that: Initializing the opening of the electronic expansion valve includes reducing the PMV opening from 30 pls to 15 pls to prevent refrigerant leakage of the floor heating module.

8. The air conditioning system antifreeze control method according to claim 5, characterized in that: If the minimum value of the inlet water temperature of the floor heating module and / or the outlet water temperature of the floor heating module continues to be less than or equal to the third parameter for the third predetermined time, a first error signal is output.

9. The air conditioning system antifreeze control method according to claim 5 or 6, characterized in that: If the minimum value of the inlet water temperature of the floor heating module and / or the outlet water temperature of the floor heating module continues to be less than or equal to the first parameter for the fourth predetermined time, the second error signal is output.

10. The air conditioning system antifreeze control method according to claim 1, characterized in that: The first predetermined frequency is lower than the second predetermined frequency.

11. The air conditioning system antifreeze control method according to claim 1, characterized in that: The third predetermined time is greater than the second predetermined time.

12. An electronic device, characterized in that: The device comprises a processor and a memory storing computer executable instructions, wherein the processor is configured to execute the instructions to implement the air conditioning system antifreeze control method according to any one of claims 1-11.

13. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores at least one computer instruction, and the at least one instruction is loaded and executed by the processor to implement the air conditioning system antifreeze control method according to any one of claims 1 to 11.

14. A computer program product, characterized in that The computer program product includes computer instructions, and when the computer instructions are executed, the air conditioning system antifreeze control method according to any one of claims 1 to 11 is implemented.

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