Method, device and air conditioner for inhibiting frosting

Abstract

Embodiments of the present application provide a frost inhibition method, device and air conditioner, and relate to the field of air conditioner control. The method comprises: when the air conditioner is in a low-temperature heating mode, closing a refrigeration expansion valve, and determining at least one first target electronic expansion valve from each electronic expansion valve, wherein the first target electronic expansion valve is an electronic expansion valve in a lower position in a heat exchanger; increasing the opening degree of each first target electronic expansion valve; obtaining the temperature of a temperature-sensing bulb on each branch; judging whether each electronic expansion valve satisfies an adjustment condition based on the temperature; and adjusting the opening degree of the electronic expansion valve that satisfies the adjustment condition to inhibit frost. The temperature of the temperature-sensing bulb is used to cooperatively adjust the temperature-sensing bulb and the electronic expansion valve on each branch, the temperature distribution of the heat exchanger is changed, and the effect of inhibiting frost is achieved, the number of air conditioner wind stopping and defrosting is reduced, and the frequency of entering the defrosting mode is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioner control, in particular to a frost inhibition method and device and air conditioner. BACKGROUND

[0002] At present, all air conditioner manufacturers at home and abroad will have periodic defrosting operation when the outdoor temperature is low, and in the case of a more severe outdoor environment, the defrosting interval is short, the defrosting operation is frequent, the air conditioner stops heating for a long time, the indoor temperature decreases a lot, and the user experience is not good and the comfort is poor. SUMMARY

[0003] The purpose of the present application is to provide a frost inhibition method, device and air conditioner, which can reduce the defrosting frequency and inhibit frost.

[0004] In order to achieve the above purpose, the technical scheme adopted by the embodiments of the present application is as follows:

[0005] In a first aspect, the embodiments of the present application provide a frost inhibition method applied to an air conditioner, wherein the air conditioner comprises a heat exchanger, the heat exchanger includes a plurality of temperature sensing bags, a plurality of electronic expansion valves and a refrigeration expansion valve; one end of each of the temperature sensing bags is connected to each of the electronic expansion valves to form each branch, the other end of each of the temperature sensing bags is connected to each branch of a condenser, each branch of the condenser is connected to a four-way valve, one end of each of the electronic expansion valves is connected to an outlet branch of the condenser, each outlet branch converges to an outlet of the condenser, the outlet of the condenser is connected to one end of the electronic expansion valve, and the other end of the refrigeration expansion valve is connected to the branch of the condenser.

[0006] The method comprises:

[0007] When the air conditioner is in a low-temperature heating mode, the refrigeration expansion valve is closed, and at least one first target electronic expansion valve is determined from the electronic expansion valves, wherein the first target electronic expansion valve is an electronic expansion valve in a lower position in the heat exchanger;

[0008] The opening degree of each of the first target electronic expansion valves is increased;

[0009] The temperature of the temperature sensing bag on each branch is obtained;

[0010] Whether each of the electronic expansion valves meets an adjustment condition is judged based on the temperature;

[0011] The opening degree of the electronic expansion valve meeting the adjustment condition is adjusted to inhibit frost.

[0012] In an optional embodiment, the method further comprises:

[0013] The outdoor environment temperature is obtained;

[0014] comparing the outdoor ambient temperature with a first preset temperature;

[0015] determining that the air conditioner is in a low-temperature heating mode when the outdoor ambient temperature is less than or equal to the first preset temperature.

[0016] In an optional embodiment, the step of increasing the opening degree of each first target electronic expansion valve comprises:

[0017] comparing the outdoor ambient temperature with each preset temperature range;

[0018] determining a target preset temperature range to which the outdoor ambient temperature belongs;

[0019] determining an opening degree adjustment amount corresponding to the target preset temperature range, wherein different preset temperature ranges correspond to different opening degree adjustment amounts;

[0020] adjusting the opening degree of each first target electronic expansion valve based on the opening degree adjustment amount.

[0021] In an optional embodiment, the step of determining whether each electronic expansion valve meets an adjustment condition based on temperature comprises:

[0022] comparing each temperature with a second preset temperature;

[0023] determining that a second target electronic expansion valve connected to a temperature-sensing bag corresponding to a target temperature less than the second preset temperature meets the adjustment condition when there is the target temperature in the temperatures.

[0024] In an optional embodiment, the step of adjusting the opening degree of the electronic expansion valve meeting the adjustment condition to suppress frosting comprises:

[0025] increasing the opening degree of the second target electronic expansion valve;

[0026] reacquiring the temperature of the temperature-sensing bag on the branch to which the second target electronic expansion valve belongs;

[0027] comparing the reacquired temperature with a third preset temperature, wherein the third preset temperature is greater than the second preset temperature;

[0028] returning to the step of increasing the opening degree of the second target electronic expansion valve until the latest reacquired temperature is greater than or equal to the third preset temperature when the reacquired temperature is less than the third preset temperature.

[0029] In an optional embodiment, the method further comprises:

[0030] reacquire the temperature of each temperature sensing bulb;

[0031] determine the maximum temperature among the temperatures;

[0032] determine a third target electronic expansion valve connected to the temperature sensing bulb corresponding to the maximum temperature;

[0033] reduce the opening degree of the third target electronic expansion valve.

[0034] In an optional embodiment, the method further comprises:

[0035] after the air conditioner runs for a preset time length, acquire a first temperature of a main temperature sensing bulb among the temperature sensing bulbs and a second temperature of other temperature sensing bulbs, wherein the main temperature sensing bulb is the lowermost temperature sensing bulb among the temperature sensing bulbs;

[0036] compare each second temperature with a fourth preset temperature;

[0037] when each second temperature is less than the fourth preset temperature, compare the first temperature with a fifth preset temperature, wherein the fourth preset temperature is greater than the fifth preset temperature;

[0038] when the first temperature is less than the fifth preset temperature, enter a defrosting program.

[0039] In an optional embodiment, the step of entering the defrosting program when the first temperature is less than the fifth preset temperature comprises:

[0040] when the first temperature is less than the fifth preset temperature, open the refrigeration expansion valve according to a refrigeration opening degree;

[0041] close each electronic expansion valve to perform defrosting.

[0042] In a second aspect, an embodiment of the present application provides a device for inhibiting frosting, the device comprising:

[0043] a determining module configured to, when the air conditioner is in a low-temperature heating mode, close the refrigeration expansion valve and determine at least one first target electronic expansion valve from the electronic expansion valves, wherein the first target electronic expansion valve is an electronic expansion valve in a lower position relative to the heat exchanger;

[0044] a control module configured to increase the opening degree of each first target electronic expansion valve;

[0045] an acquisition module configured to acquire the temperature of each temperature sensing bulb on the branch;

[0046] a judgment module configured to judge whether each electronic expansion valve meets an adjustment condition based on the temperature;

[0047] The adjusting module is configured to adjust the opening degree of the electronic expansion valve satisfying the adjustment condition to inhibit frost formation.

[0048] In a third aspect, an air conditioner is provided, which comprises a heat exchanger, a memory and a processor.

[0049] The heat exchanger comprises a plurality of temperature sensing bulbs, a plurality of electronic expansion valves and a refrigeration expansion valve. One end of each of the temperature sensing bulbs is connected to each of the electronic expansion valves to form a branch, the other end of each of the temperature sensing bulbs is connected to a branch of a condenser, each branch of the condenser is connected to a four-way valve, one end of each of the electronic expansion valves is connected to an outlet branch of the condenser, each outlet branch converges to an outlet of the condenser, the outlet of the condenser is connected to one end of the electronic expansion valve, and the other end of the refrigeration expansion valve is connected to a branch of the condenser.

[0050] The memory stores a program, and the program is executed by the processor to implement the frost formation inhibition method.

[0051] In a fourth aspect, a storage medium is provided, which stores a computer program. The computer program is executed by a processor to implement the steps of the frost formation inhibition method.

[0052] The present application has the following beneficial effects:

[0053] The present application designs a heat exchanger, which comprises a plurality of temperature sensing bulbs, a plurality of electronic expansion valves and a refrigeration expansion valve. One end of each of the temperature sensing bulbs is connected to each of the electronic expansion valves to form a branch, the other end of each of the temperature sensing bulbs is connected to a branch of a condenser, each branch of the condenser is connected to a four-way valve, one end of each of the electronic expansion valves is connected to an outlet branch of the condenser, each outlet branch converges to an outlet of the condenser, the outlet of the condenser is connected to one end of the electronic expansion valve, and the other end of the refrigeration expansion valve is connected to a branch of the condenser. When the air conditioner is in a low-temperature heating mode, the refrigeration expansion valve is closed, at least one first target electronic expansion valve is determined from the electronic expansion valves, the first target electronic expansion valve is an electronic expansion valve with a relatively low position in the heat exchanger, the opening degree of each first target electronic expansion valve is increased, the temperature of the temperature sensing bulb on each branch is obtained, whether each electronic expansion valve satisfies an adjustment condition is determined based on the temperature, and the opening degree of the electronic expansion valve satisfying the adjustment condition is adjusted to inhibit frost formation. BRIEF DESCRIPTION OF DRAWINGS

[0054] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0055] Figure 1 A block schematic diagram of an air conditioner provided by the embodiments of the present application is shown in the following.

[0056] Figure 2 A step flow chart of a frost inhibition method provided by the embodiments of the present application is shown in the following.

[0057] Figure 3 A structure schematic diagram of a heat exchanger provided by the embodiments of the present application is shown in the following.

[0058] Figure 4 A step flow chart of a frost inhibition method provided by the embodiments of the present application is shown in the following.

[0059] Figure 5 A step flow chart of a frost inhibition method provided by the embodiments of the present application is shown in the following.

[0060] Figure 6 A step flow chart of a frost inhibition method provided by the embodiments of the present application is shown in the following.

[0061] Figure 7 A step flow chart of a frost inhibition method provided by the embodiments of the present application is shown in the following.

[0062] Figure 8 A step flow chart of a frost inhibition method provided by the embodiments of the present application is shown in the following.

[0063] Figure 9 A step flow chart of a frost inhibition method provided by the embodiments of the present application is shown in the following.

[0064] Figure 10 A structure block diagram of a frost inhibition device provided by the embodiments of the present application is shown in the following. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0066] Therefore, the following detailed description of embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but merely represents selected embodiments of the application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0067] It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0068] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is used, and are merely for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0069] In addition, if the terms "first", "second" and the like appear, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0070] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between the two elements inside. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0071] After a large number of research by the inventor, it is found that at present, when the air conditioner is running, the outer heat exchanger is the evaporation end, the temperature is low, and it is placed in the outdoor environment. If the humidity is high and the temperature is low, the evaporation end temperature is lower than the outdoor environment dew point, the outer heat exchanger will quickly be covered with water droplets, and even be covered with ice and frost; most air conditioner manufacturers in the industry use the form of outer disc temperature sensor to obtain the temperature of the outer disc. When the outer disc temperature is lower than a certain value, the air conditioner enters the defrosting mode, the four-way valve switches, the indoor unit stops heating, starts defrosting, and when the outer disc temperature rises to a specified temperature, the heating starts again. After multiple cycles of operation, the air conditioner may have a thick frost layer, and normal defrosting operation cannot completely remove the frost layer, which will cause the air conditioner output to be significantly reduced, the air outlet temperature to be reduced, the defrosting frequency to be increased, etc., making people feel cold and obviously uncomfortable.

[0072] In view of the above problems, the embodiment provides a frost inhibition method and device and an air conditioner, which can change the temperature distribution of a heat exchanger by designing the structure of the heat exchanger and adjusting the temperature sensing bulb on each branch and the electronic expansion valve based on the temperature of the temperature sensing bulb of the designed heat exchanger, so as to achieve the effect of inhibiting frost, reduce the number of air conditioner wind stopping and defrosting, and reduce the frequency of entering the defrosting mode. The scheme provided in the embodiment is described in detail below.

[0073] Please refer to Figure 1 , Figure 1 is a structural schematic diagram of an air conditioner 100 provided in the embodiment. The air conditioner 100 can further include more or fewer components than those shown in Figure 1 or have a different configuration from Figure 1 . Figure 1 Each component shown in may be implemented in hardware, software, or a combination thereof.

[0074] The air conditioner 100 includes a frost inhibition device 110, a memory 120, and a processor 130.

[0075] The memory 120 and the processor 130 are directly or indirectly electrically connected to each other to realize the transmission or interaction of data. For example, these elements can be electrically connected to each other through one or more communication buses or signal lines. The frost inhibition device 110 includes at least one software function module stored in the memory 120 in the form of software or firmware or solidified in the operating system (OS) of the air conditioner 100. The processor 130 is used to execute the executable modules stored in the memory 120, such as the software function modules included in the frost inhibition device 110 and computer programs, etc.

[0076] The memory 120 can be, but is not limited to, a random access memory (RAM), a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), etc. The memory 120 is used to store programs, and the processor 130 executes the programs after receiving an execution instruction.

[0077] Please refer toFigure 2 , Figure 2 For application Figure 1 The flowchart below shows a method for suppressing frost formation in an air conditioner 100. The method includes detailed explanations of each step.

[0078] The frosting suppression method of this application embodiment is applied to an air conditioner, which includes a heat exchanger, such as... Figure 3 As shown, the heat exchanger includes multiple temperature sensing bulbs 1, multiple electronic expansion valves 2, and a refrigeration expansion valve 3. One end of each temperature sensing bulb 1 is connected to each electronic expansion valve 2 to form a branch. The other end of each temperature sensing bulb 1 is connected to each branch of the condenser. Each branch of the condenser is connected to a four-way valve. One end of each electronic expansion valve 2 is connected to the outlet branch of the condenser. All outlet branches converge at the outlet of the condenser. The outlet of the condenser is connected to one end of the electronic expansion valve. The other end of the refrigeration expansion valve is connected to the branch of the condenser.

[0079] S201: When the air conditioner is in low temperature heating mode, the cooling expansion valve is closed, and at least one first target electronic expansion valve is identified from among the electronic expansion valves.

[0080] The first target electronic expansion valve is the electronic expansion valve located in the lower layer of the heat exchanger.

[0081] S202: Increase the opening degree of each first target electronic expansion valve.

[0082] S203: Obtain the temperature of the temperature sensor on each branch.

[0083] S204: Determine whether each electronic expansion valve meets the adjustment conditions based on temperature.

[0084] S205: Adjust the opening of the electronic expansion valve that meets the adjustment conditions to suppress frost formation.

[0085] Still refer to Figure 3 When there are four electronic expansion valves, from top to bottom, they are designated as electronic expansion valve 1, electronic expansion valve 2, electronic expansion valve 3, and electronic expansion valve 4. When the air conditioner is in low-temperature heating mode, the cooling expansion valve is closed. From electronic expansion valves 1, 2, 3, and 4, at least one first target electronic expansion valve is identified as being located at the lower layer of the heat exchanger. Figure 3In the embodiment, the second electronic expansion valve is the first target electronic expansion valve in the lower layer, and the fourth electronic expansion valve is the first target electronic expansion valve in the lower layer. The opening degrees of the second electronic expansion valve and the fourth electronic expansion valve are increased, so that the temperature difference between the second electronic expansion valve and the first electronic expansion valve, the third electronic expansion valve and the fourth electronic expansion valve is more obvious, thereby changing the temperature distribution of the entire heat exchanger to inhibit frosting.

[0086] The temperature of the temperature sensing bulb on each branch is obtained, and the electronic expansion valve satisfying the adjustment condition is adjusted to adjust the temperature distribution of the heat exchanger, thereby further inhibiting frosting.

[0087] There are various ways to determine whether the air conditioner is in the low-temperature heating mode. In an implementation, as shown in Figure 4 the steps include:

[0088] S301: Obtain the outdoor environment temperature.

[0089] S302: Compare the outdoor environment temperature with the first preset temperature.

[0090] S303: When the outdoor environment temperature is less than or equal to the first preset temperature, determine that the air conditioner is in the low-temperature heating mode.

[0091] There are various ways to obtain the outdoor environment temperature. In an implementation, the outdoor environment temperature is obtained by a temperature sensor in the outdoor unit of the air conditioner, or the outdoor environment temperature corresponding to the geographical position where the air conditioner is located is obtained through a network and sent to the wireless communication module of the air conditioner to obtain the outdoor environment temperature.

[0092] The outdoor environment temperature is compared with the first preset temperature. When the outdoor environment temperature is less than or equal to the first preset temperature, it is determined that the air conditioner is in the low-temperature heating mode. When the outdoor environment temperature is greater than the first preset temperature, it is determined that the air conditioner is not in the low-temperature heating mode.

[0093] It should be noted that the first preset temperature can be set to 3°, 4°, 5°, etc., and the present embodiment does not make specific limitations.

[0094] There are various ways to increase the opening degree of each first target electronic expansion valve. In an implementation, as shown in Figure 5 the steps include:

[0095] S202-1: Compare the outdoor environment temperature with each preset temperature range.

[0096] S202-2: Determine the target preset temperature range to which the outdoor environment temperature belongs.

[0097] S202-3: Determine the opening degree adjustment amount corresponding to the target preset temperature range.

[0098] Different preset temperature ranges correspond to different opening degree adjustment amounts.

[0099] S202-4: Adjust the opening degree of each first target electronic expansion valve based on the opening degree adjustment amount.

[0100] The opening degree of each first target electronic expansion valve is determined by the outdoor environment temperature, and different outdoor environment temperatures correspond to different opening degree adjustment amounts.

[0101] Specifically, the outdoor environment temperature is compared with each preset temperature range, different preset temperature ranges correspond to different opening degree adjustment amounts, for example, when each preset temperature range includes a first preset temperature range and a second preset temperature range, and the first preset temperature range is greater than the second preset temperature range, the first preset temperature range corresponds to a first opening degree adjustment amount, and the second preset temperature range corresponds to a second opening degree adjustment amount, wherein the first opening degree adjustment amount is less than the second opening degree adjustment amount.

[0102] There are many implementation manners for the temperature sensing bag to determine whether each electronic expansion valve meets the adjustment condition, in one implementation manner, as shown in Figure 6 , the following steps are included:

[0103] S204-1: Compare each temperature with the second preset temperature.

[0104] S204-2: When there is a target temperature less than the second preset temperature in each temperature, determine that the second target electronic expansion valve connected by the temperature sensing bag corresponding to the temperature meets the adjustment condition.

[0105] It should be noted that the second preset temperature can be set to 0°, -1°, -2°, etc., and the present application embodiment does not make specific limitation.

[0106] Compare each temperature of the temperature sensing bag with the second preset temperature, and obtain the electronic expansion valve connected by the temperature sensing bag with a temperature less than the second preset temperature as the second target electronic expansion valve meeting the adjustment condition.

[0107] There are many implementation manners for adjusting the opening degree of the electronic expansion valve meeting the adjustment condition, in one implementation manner, as shown in Figure 7 , the following steps are included:

[0108] S401: Increase the opening degree of the second target electronic expansion valve.

[0109] S402: Reacquire the temperature of the temperature sensing bag on the branch to which the second target electronic expansion valve belongs.

[0110] S403: compare the re-acquired temperature with a third preset temperature.

[0111] The third preset temperature is greater than the second preset temperature.

[0112] S404: when the re-acquired temperature is less than the third preset temperature, return to execute the step of increasing the opening degree of the third target electronic expansion valve to compare the re-acquired temperature with the third preset temperature until the latest acquired temperature is greater than or equal to the third preset temperature.

[0113] For example, compare each temperature of the temperature sensing bag with the second preset temperature respectively, acquire the connected electronic expansion valve of the temperature sensing bag less than the second preset temperature as the second target electronic expansion valve satisfying the adjustment condition, and increase the opening degree of the second target electronic expansion valve. After a preset time period, re-acquire the temperature of each temperature sensing bag connected to each second target electronic expansion valve, compare the temperature of the temperature sensing bag with the third preset temperature. When the temperature of the temperature sensing bag is greater than or equal to the third preset temperature, no further adjustment of the opening degree of the second electronic expansion valve is needed. When the temperature of the temperature sensing bag is less than the third preset temperature, the opening degree of the second target electronic expansion valve needs to be increased again until the temperature of the temperature sensing bag connected to the second target electronic expansion valve after adjusting the opening degree is greater than or equal to the third preset temperature.

[0114] It should be noted that the third preset temperature can be set to 1°, 2°, 3°, etc., and the embodiments of the present application do not make specific limitations.

[0115] In order to further alleviate frost, refer to Figure 8 , comprising the following steps:

[0116] S501: re-acquire the temperature of each temperature sensing bag.

[0117] S502: determine the maximum temperature among the temperatures.

[0118] S503: determine the third target electronic expansion valve connected to the temperature sensing bag corresponding to the maximum temperature.

[0119] S504: reduce the opening degree of the third target electronic expansion valve.

[0120] After the temperature of the temperature sensing bag connected to the second target electronic expansion valve is greater than or equal to the third preset temperature, re-acquire the temperature of each temperature sensing bag, determine the maximum temperature therefrom, determine the third target electronic expansion valve connected to the temperature sensing bag corresponding to the maximum temperature, and reduce the opening degree of the third target electronic expansion valve, thereby balancing the evaporation amount of each branch.

[0121] In order to further inhibit frost, refer to Figure 9 , comprising the following steps:

[0122] S601: obtaining a first temperature of a main temperature sensing bag and second temperatures of other temperature sensing bags after the air conditioner runs for a preset time length.

[0123] The main temperature sensing bag is the lowest temperature sensing bag among the temperature sensing bags.

[0124] S602: comparing the second temperatures with a fourth preset temperature.

[0125] S603: comparing the first temperature with a fifth preset temperature when the second temperatures are all less than the fourth preset temperature.

[0126] The fourth preset temperature is greater than the fifth preset temperature.

[0127] S604: entering a defrosting program when the first temperature is less than the fifth preset temperature.

[0128] The defrosting program has various implementation manners. In one implementation manner, the refrigeration expansion valve is opened according to a refrigeration opening degree when the first temperature is less than the fifth preset temperature, and the electronic expansion valves are closed to defrost.

[0129] It should be noted that, referring to Figure 3 , the temperature sensing bag connected with the fourth electronic expansion valve is the main temperature sensing bag.

[0130] For example, after the air conditioner runs stably for a preset time length, for example, 3 minutes, the first temperature of the main temperature sensing bag connected with the fourth electronic expansion valve and the second temperatures of other temperature sensing bags are obtained. The second temperatures are all less than a fourth preset temperature, and the fourth preset temperature can be set to -5°. When the first temperature is less than a fifth preset temperature, the fifth preset temperature can be set to -6°, and the defrosting program is entered. The conventional refrigeration opening degree of the refrigeration expansion valve is opened, and the first, second, third and fourth electronic expansion valves are all closed. The system refrigeration runs, and the defrosting is entered.

[0131] It should be noted that the preset time length can be set to 3 minutes, 4 minutes, 5 minutes, etc., and the present embodiment does not make specific limitation thereto.

[0132] When any one of the second temperatures is greater than the fourth preset temperature or the first temperature is greater than or equal to the fifth preset temperature, the temperature of each temperature sensing bag is continuously detected, and the corresponding electronic expansion valve is adjusted based on the temperature of each temperature sensing bag, so as to adjust the temperature distribution on the heat exchanger, and further inhibit the frost formation.

[0133] Please refer to Figure 10 , the present embodiment further provides an air conditioner. Figure 1The anti-frosting device 110 of the air conditioner 100, the anti-frosting device 110 comprises:

[0134] A determination module 111 is configured to determine at least one first target electronic expansion valve from the electronic expansion valves while the air conditioner is in a low-temperature heating mode and the refrigeration expansion valve is closed, wherein the first target electronic expansion valve is an electronic expansion valve at a lower position in the heat exchanger.

[0135] A control module 112 is configured to increase the opening degree of each first target electronic expansion valve.

[0136] An acquisition module 113 is configured to acquire the temperature of the temperature-sensing bulb on each branch.

[0137] A judgment module 114 is configured to determine whether each electronic expansion valve meets an adjustment condition based on the temperature.

[0138] An adjustment module 115 is configured to adjust the opening degree of the electronic expansion valve that meets the adjustment condition to inhibit frost formation.

[0139] The application further provides an air conditioner 100, which comprises a processor 130 and a memory 120. The memory 120 stores computer executable instructions, and the computer executable instructions are executed by the processor 130 to implement the anti-frosting method.

[0140] The application further provides a storage medium, which stores a computer program, and the computer program is executed by the processor 130 to implement the anti-frosting method.

[0141] In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can also be implemented by other manners. The apparatus embodiments described above are only schematic, for example, the flowcharts and block diagrams in the drawings show the possible implementation architectures, functions and operations of the apparatus, method and computer program product according to the embodiments of the present application. In this regard, each block in the flowcharts or block diagrams can represent a module, a program segment or a part of code, which contains one or more executable instructions for implementing the specified logic function. It should also be noted that, in some alternative implementation manners, the functions noted in the blocks can also occur in different orders from those noted in the drawings. For example, two consecutive blocks can actually be executed in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and the combination of blocks in the block diagrams and / or flowcharts, can be implemented by a special hardware-based system for executing the specified functions or actions, or can be implemented by a combination of special hardware and computer instructions.

[0142] In addition, the various functional modules in the various embodiments of the present application can be integrated together to form an independent part, or can exist independently, or two or more modules can be integrated to form an independent part. When the functions are realized in the form of software functional modules and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

[0143] It should be noted that, in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0144] The above is only various embodiments of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be limited by the protection scope of the claims.

Claims

1. A method for suppressing frost formation, applied to an air conditioner, characterized in that, The air conditioner includes a condenser, which comprises multiple temperature sensors, multiple electronic expansion valves, and a refrigeration expansion valve. One end of each temperature sensor is connected to each electronic expansion valve to form a branch, and the other end of each temperature sensor is connected to each branch of the condenser. Each branch of the condenser is connected to a four-way valve. One end of each electronic expansion valve is connected to the outlet branch of the condenser. All outlet branches converge at the outlet of the condenser. The outlet of the condenser is connected to one end of the refrigeration expansion valve, and the other end of the refrigeration expansion valve is connected to the branch of the condenser. The method includes: When the air conditioner is in low temperature heating mode, the refrigeration expansion valve is closed, and at least one first target electronic expansion valve is determined from each electronic expansion valve, wherein the first target electronic expansion valve is the electronic expansion valve located in the lower layer of the condenser. Increase the opening degree of each of the first target electronic expansion valves; Obtain the temperature of the temperature sensor on each of the aforementioned branches; Based on temperature, determine whether each of the electronic expansion valves meets the adjustment conditions; The opening of the electronic expansion valve that meets the adjustment conditions is adjusted to suppress frosting; The method further includes: Reacquire the temperature of each temperature sensor; Determine the maximum temperature among all temperatures; Determine the third target electronic expansion valve connected to the temperature sensing bulb corresponding to the maximum temperature; Reduce the opening degree of the third target electronic expansion valve.

2. The method according to claim 1, characterized in that, The method further includes: Obtain the outdoor ambient temperature; Compare the outdoor ambient temperature with the first preset temperature; When the outdoor ambient temperature is less than or equal to the first preset temperature, the air conditioner is determined to be in low-temperature heating mode.

3. The method according to claim 2, characterized in that, The step of increasing the opening of each of the first target electronic expansion valves includes: Compare the outdoor ambient temperature with each preset temperature range; Determine the target preset temperature range to which the outdoor ambient temperature belongs; Determine the opening adjustment amount corresponding to the target preset temperature range, wherein different preset temperature ranges correspond to different opening adjustment amounts; The opening degree of each of the first target electronic expansion valves is adjusted based on the opening degree adjustment amount.

4. The method according to claim 1, characterized in that, The step of determining whether each of the electronic expansion valves meets the adjustment conditions based on temperature includes: Compare each of the stated temperatures with the second preset temperature; When there is a target temperature lower than the second preset temperature among the various temperatures, it is determined that the second target electronic expansion valve connected to the temperature sensing bulb corresponding to that temperature meets the adjustment conditions.

5. The method according to claim 4, characterized in that, The step of adjusting the opening of the electronic expansion valve that meets the adjustment conditions to suppress frosting includes: Increase the opening of the second target electronic expansion valve; Reacquire the temperature of the temperature sensing bulb on the branch to which the second target electronic expansion valve belongs; The reacquired temperature is compared with a third preset temperature, wherein the third preset temperature is greater than the second preset temperature; If the newly acquired temperature is less than the third preset temperature, the process returns to the step of increasing the opening of the second target electronic expansion valve to compare the newly acquired temperature with the third preset temperature, until the latest acquired temperature is greater than or equal to the third preset temperature.

6. The method according to claim 1, characterized in that, The method further includes: After the air conditioner has been running for a preset period of time, the first temperature of the main temperature sensor and the second temperature of the other temperature sensors are obtained, wherein the main temperature sensor is the lowest temperature sensor among all temperature sensors. Compare each of the second temperatures with the fourth preset temperature; When each of the second temperatures is less than the fourth preset temperature, the first temperature is compared with the fifth preset temperature, wherein the fourth preset temperature is greater than the fifth preset temperature; When the first temperature is lower than the fifth preset temperature, the defrosting process begins.

7. The method according to claim 6, characterized in that, The step of entering the defrosting procedure when the first temperature is lower than the fifth preset temperature includes: When the first temperature is lower than the fifth preset temperature, the refrigeration expansion valve is opened according to the refrigeration opening degree; Close all the electronic expansion valves to defrost.

8. A device for suppressing frosting, characterized in that, The device includes: The determination module is used to close the refrigeration expansion valve when the air conditioner is in low temperature heating mode, and to determine at least one first target electronic expansion valve from each electronic expansion valve, wherein the first target electronic expansion valve is the electronic expansion valve located in the lower layer of the condenser. The control module is used to increase the opening degree of each of the first target electronic expansion valves; The acquisition module is used to acquire the temperature of the temperature sensors on each branch. The judgment module is used to determine whether each of the electronic expansion valves meets the adjustment conditions based on the temperature. The adjustment module is used to adjust the opening of the electronic expansion valve that meets the adjustment conditions in order to suppress frost formation; The adjustment module is also used for: Reacquire the temperature of each temperature sensor; Determine the maximum temperature among all temperatures; Determine the third target electronic expansion valve connected to the temperature sensing bulb corresponding to the maximum temperature; Reduce the opening degree of the third target electronic expansion valve.

9. An air conditioner, characterized in that, The air conditioner includes: a condenser, a memory, and a processor; The condenser includes multiple temperature sensors, multiple electronic expansion valves, and a refrigeration expansion valve; one end of each temperature sensor is connected to each electronic expansion valve to form a branch, and the other end of each temperature sensor is connected to each branch of the condenser. Each branch of the condenser is connected to a four-way valve, and one end of each electronic expansion valve is connected to the outlet branch of the condenser. All outlet branches converge at the outlet of the condenser, and the outlet of the condenser is connected to one end of the refrigeration expansion valve. The other end of the refrigeration expansion valve is connected to the branch of the condenser. The memory stores a program that, when executed by the processor, implements the method for suppressing frosting as described in any one of claims 1-7.

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