Variable split control method and device based on supercooling degree and air conditioner

Abstract

The application provides a supercooling degree-based variable split control method and device and an air conditioner, and is applied to the field of air conditioner control. The method comprises the following steps: firstly, judging whether the current environment temperature meets the user demand when the air conditioner is in a refrigeration mode and in a stable operation state; then, calculating the current supercooling degree and sequentially executing a first control strategy and a second control strategy based on the current supercooling degree until a preset condition is met when the current environment temperature cannot meet the user demand; wherein the first control strategy is adjusting the fan rotating speed of the indoor unit; the second control strategy is adjusting the split mode of a splitter; and the split mode of the splitter comprises single-path split and double-path split. The supercooling degree-based variable split control method and device and the air conditioner provided by the application are used for increasing the heat exchange capacity by changing the split mode when the heat exchange capacity is reduced, so that the situation that the power consumption increases and the refrigeration effect is poor when the air conditioner is self-cleaning can be avoided.

Description

Technical Field

[0001] This application relates to the field of air conditioner control, and in particular to a variable flow control method, device and air conditioner based on subcooling. Background Technology

[0002] As people's living standards continue to improve and the level of intelligence in home appliances continues to rise, smart home appliances are becoming increasingly popular. Users can use air conditioners to heat in winter to raise the indoor temperature, and they can also use air conditioners to cool in summer to lower the indoor temperature.

[0003] In related technologies, in order to improve the heat exchange efficiency of air conditioners, many air conditioners have a self-cleaning function, which uses condensate water or microcurrent to self-clean the heat exchanger.

[0004] However, prolonged self-cleaning can affect the heat exchanger's heat exchange capacity to some extent, increasing power consumption and also affecting the air conditioner's cooling effect. Summary of the Invention

[0005] The purpose of this application is to provide a variable flow control method, device and air conditioner based on subcooling, which can increase the heat exchange capacity by changing the flow distribution method when the heat exchange capacity is reduced, and avoid the situation of increased power consumption and poor cooling effect when the air conditioner is self-cleaning.

[0006] This application provides a variable flow split control method based on subcooling, including:

[0007] When the air conditioner is in cooling mode and operating stably, it determines whether the current ambient temperature meets the user's needs. If the current ambient temperature does not meet the user's needs, it calculates the current subcooling and executes the first and second control strategies sequentially based on the current subcooling until a preset condition is met. The first control strategy is to adjust the fan speed of the indoor unit; the second control strategy is to adjust the flow distribution mode of the splitter. The flow distribution mode of the splitter includes single-path splitting and dual-path splitting. The preset condition includes an increase in subcooling. One end of the splitter is connected to the throttling unit, and the other end is connected to the heat exchanger on the outdoor unit.

[0008] Optionally, determining whether the current ambient temperature meets the user's needs includes: obtaining the current indoor ambient temperature and the set temperature of the air conditioner, and calculating the temperature difference between the current ambient temperature and the set temperature. If the temperature difference is greater than a preset difference, it is determined that the current ambient temperature does not meet the user's needs; otherwise, the current ambient temperature meets the user's needs.

[0009] Optionally, the calculating the current supercooling degree comprises: acquiring an outlet gas pressure of the condenser and a liquid temperature at the condenser outlet, and determining a saturation temperature by table lookup based on the outlet gas pressure; and calculating a difference between the saturation temperature and the liquid temperature to obtain the current supercooling degree.

[0010] Optionally, the sequentially executing the first control strategy and the second control strategy based on the current supercooling degree until the preset condition is met comprises: in a case where the current supercooling degree is less than a preset supercooling degree threshold, executing the first control strategy, and determining whether the preset condition is met after a first preset time length; and in a case where the supercooling degree of the air conditioner is greater than or equal to the preset supercooling degree threshold, stopping execution of the first control strategy if the preset condition is met.

[0011] Optionally, the sequentially executing the first control strategy and the second control strategy based on the current supercooling degree until the preset condition is met comprises: in a case where the current supercooling degree is less than a preset supercooling degree threshold, executing the first control strategy, and determining whether the preset condition is met after a first preset time length; and in a case where the supercooling degree of the air conditioner is greater than or equal to the preset supercooling degree threshold, stopping execution of the first control strategy if the preset condition is met.

[0012] Optionally, after the determining whether the current ambient temperature meets the user demand, the method further comprises: in a case where the current supercooling degree is greater than or equal to the preset supercooling degree threshold, keeping a current running state of the air conditioner unchanged.

[0013] The application further provides a variable split control device based on supercooling degree, comprising:

[0014] a determining module configured to determine whether a current ambient temperature meets a user demand in a case where an air conditioner is in a cooling mode and is in a stable running state; a calculating module configured to calculate a current supercooling degree in a case where the current ambient temperature does not meet the user demand; and a control module configured to sequentially execute a first control strategy and a second control strategy based on the current supercooling degree until a preset condition is met; wherein the first control strategy is adjusting a fan rotating speed of an indoor unit; the second control strategy is adjusting a split mode of a splitter; the split mode of the splitter comprises single-path split and double-path split; and the preset condition comprises supercooling degree increase.

[0015] Optionally, the apparatus further comprises an obtaining module; the obtaining module is configured to obtain a current indoor ambient temperature and a set temperature of the air conditioner; the calculating module is further configured to calculate a temperature difference between the current ambient temperature and the set temperature; the judging module is specifically configured to determine that the current ambient temperature cannot meet the user demand if the temperature difference is greater than a preset difference, and otherwise, the current ambient temperature can meet the user demand.

[0016] Optionally, the obtaining module is further configured to obtain an outlet gas pressure of the condenser and a liquid temperature at the outlet of the condenser; the calculating module is specifically configured to determine a saturation temperature by table lookup based on the outlet gas pressure; the calculating module is further specifically configured to calculate a difference between the saturation temperature and the liquid temperature to obtain the current supercooling degree.

[0017] Optionally, the control module is specifically configured to execute the first control strategy if the current supercooling degree is less than a preset supercooling degree threshold, and judge whether the preset condition is met after a first preset time length; the control module is further specifically configured to stop executing the first control strategy if the supercooling degree of the air conditioner is greater than or equal to the preset supercooling degree threshold when the preset condition is met.

[0018] Optionally, the control module is specifically configured to execute the second control strategy if the preset condition is not met, and judge whether the preset condition is met after a second preset time length; the control module is further specifically configured to stop executing the second control strategy if the supercooling degree of the air conditioner is greater than or equal to the preset supercooling degree threshold when the preset condition is met.

[0019] Optionally, the control module is further configured to keep the current running state of the air conditioner unchanged if the current supercooling degree is greater than or equal to the preset supercooling degree threshold.

[0020] The application further provides a computer program product, comprising computer programs / instructions, which, when executed by a processor, implement the steps of the supercooling degree-based variable flow distribution control method according to any one of the above.

[0021] The application further provides an electronic device, which can be an air conditioner, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the supercooling degree-based variable flow distribution control method according to any one of the above when executing the program.

[0022] The application further provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the steps of the supercooling degree-based variable split control method.

[0023] The application provides a supercooling degree-based variable split control method, device and air conditioner. First, when the air conditioner is in a refrigeration mode and in a stable operation state, it is determined whether the current environment temperature meets the user demand. Then, when the current environment temperature cannot meet the user demand, the current supercooling degree is calculated, and the first control strategy and the second control strategy are sequentially executed based on the current supercooling degree until a preset condition is met. The first control strategy is to adjust the fan rotating speed of the indoor unit. The second control strategy is to adjust the split mode of the splitter. The split mode of the splitter includes single-path split and double-path split. The preset condition includes supercooling degree increase. One end of the splitter is connected with the throttling unit, and the other end is connected with the heat exchanger on the outdoor unit. In this way, when the heat exchange capacity decreases, the heat exchange capacity can be increased by changing the split mode, thereby avoiding the situation that the power consumption increases and the refrigeration effect is poor when the air conditioner is self-cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 is a schematic diagram of the operation principle of the air conditioner provided by the application;

[0026] Figure 2 is a flowchart of the supercooling degree-based variable split control method provided by the application;

[0027] Figure 3 is a structural schematic diagram of the throttling unit and the splitter provided by the application;

[0028] Figure 4 is a structural schematic diagram of the outdoor heat exchanger provided by the application;

[0029] Figure 5 is a structural schematic diagram of the supercooling degree-based variable split control device provided by the application;

[0030] Figure 6 is a structural schematic diagram of the electronic device provided by the application. DETAILED DESCRIPTION

[0031] In order to make the purposes, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0032] The terms "first", "second" and the like in the description and claims of the present application are used to distinguish similar objects, and are not used to describe a particular order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second" and the like are generally of a kind and are not limited in number, for example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the front and rear associated objects.

[0033] The operation principle of the air conditioner related to the embodiments of the present application is described in detail as follows:

[0034] As shown in Figure 1 The compressor compresses the refrigerant (cooling medium), which is delivered to the condenser through the pipeline. The high-temperature and high-pressure gaseous refrigerant releases heat in the condenser and becomes a medium-temperature and high-pressure liquid refrigerant. Then, the medium-temperature and high-pressure liquid refrigerant is depressurized by the capillary tube (throttling unit) and becomes a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant is delivered to the evaporator and evaporated into a gas, and absorbs a large amount of heat during the evaporation process. Finally, the low-temperature and low-pressure gaseous refrigerant in the evaporator is delivered to the compressor and participates in the next cycle. When the air conditioner is cooling, the heat exchanger of the outdoor unit is the condenser, and the heat exchanger of the indoor unit is the evaporator; conversely, when the air conditioner is heating, the heat exchanger of the outdoor unit is the evaporator, and the heat exchanger of the indoor unit is the condenser.

[0035] In the related art, long-time operation of the self-cleaning function of the air conditioner can cause the heat exchange capacity of the indoor heat exchanger to deteriorate. To address the above technical problems in the related art, the present application provides a variable split control method based on supercooling degree, which can increase the heat exchange capacity of the outdoor heat exchanger by changing the split mode when the heat exchange capacity is reduced, thereby avoiding the situation of increased power consumption and poor cooling effect during self-cleaning of the air conditioner.

[0036] The variable split control method based on supercooling degree provided by the embodiments of the present application will be described in detail below in conjunction with the drawings and specific embodiments and their application scenarios.

[0037] As Figure 2 shown, the variable flow control method based on supercooling degree provided by the embodiments of the present application can include the following steps 201 and 202:

[0038] Step 201, in the case that the air conditioner is in the cooling mode and in the stable running state, it is determined whether the current environment temperature meets the user's demand.

[0039] Exemplarily, the current environment temperature cannot meet the user's demand, which means that the cooling effect of the air conditioner is poor. At this time, the first control strategy and the second control strategy provided by the embodiments of the present application can be used to control the air conditioner to improve the heat exchange capacity of the indoor unit, and further improve the cooling capacity of the indoor unit.

[0040] Specifically, the step of determining whether the user's demand is met in step 201 can further include the following step 201a:

[0041] Step 201a, the current indoor environment temperature and the set temperature of the air conditioner are obtained, and the temperature difference between the current environment temperature and the set temperature is calculated. If the temperature difference is greater than a preset difference, it is determined that the current environment temperature cannot meet the user's demand, otherwise, the current environment temperature can meet the user's demand.

[0042] Exemplarily, if the indoor environment temperature cannot meet the user's demand after the air conditioner is running stably, it can be determined that the heat exchange capacity of the indoor heat exchanger is reduced. At this time, the control method provided by the embodiments of the present application can be used to control the operation of the air conditioner to improve the heat exchange capacity of the indoor heat exchanger, and further improve the cooling effect.

[0043] Step 202, in the case that the current environment temperature cannot meet the user's demand, the current supercooling degree is calculated, and the first control strategy and the second control strategy are sequentially executed based on the current supercooling degree until a preset condition is met.

[0044] The first control strategy is to adjust the fan speed of the indoor unit; the second control strategy is to adjust the flow distribution mode of the flow divider; the flow distribution mode of the flow divider includes single flow distribution and double flow distribution; the preset condition includes supercooling degree increase; one end of the flow divider is connected with the throttling unit, and the other end is connected with the heat exchanger on the outdoor unit.

[0045] Exemplarily, in the embodiments of the present application, when it is determined that the current indoor environment temperature does not meet the user's cooling demand, the supercooling degree of the air conditioner can be calculated, and the heat exchange capacity of the indoor heat exchanger can be improved based on the supercooling degree.

[0046] Specifically, the step of calculating the supercooling degree in step 202 can further include steps 202a1 and 202a2.

[0047] In step 202a1, the outlet gas pressure of the condenser and the liquid temperature at the outlet of the condenser are obtained, and the saturation temperature is determined by looking up a table based on the outlet gas pressure.

[0048] In step 202a2, the difference between the saturation temperature and the liquid temperature is calculated to obtain the current supercooling degree.

[0049] For example, in an embodiment of the present application, the supercooling degree can be calculated according to the following formula 1.

[0050] (Formula 1)

[0051] wherein, P is the supercooling degree, is the saturation temperature corresponding to the outlet pressure of the condenser, is the refrigerant temperature at the outlet of the condenser.

[0052] Specifically, the control step in step 202 can further include steps 202b1 and 202b2.

[0053] In step 202b1, if the current supercooling degree is less than a preset supercooling degree threshold, the first control strategy is executed, and whether the preset condition is met is determined after a first preset time period.

[0054] In step 202b2, if the preset condition is met, the first control strategy is stopped in the case where the supercooling degree of the air conditioner is greater than or equal to the preset supercooling degree threshold.

[0055] For example, in the case where the calculated current supercooling degree is less than the preset supercooling degree threshold, the first control strategy can be executed first, and whether the supercooling degree increases is determined after a first preset time period; if yes, it can be determined that the first control strategy is effective, and the second control strategy can not be executed first.

[0056] Specifically, after step 202b1, the control step in step 202 can further include steps 202b3 and 202b4.

[0057] In step 202b3, if the preset condition is not met, the second control strategy is executed, and whether the preset condition is met is determined after a second preset time period.

[0058] In step 202b3, if the preset condition is met, the second control strategy is stopped in the case where the supercooling degree of the air conditioner is greater than or equal to the preset supercooling degree threshold.

[0059] For example, if the increase in supercooling caused by the first control strategy is low and still cannot reach the preset supercooling threshold, then the second control strategy can be executed after the first control strategy is executed, until the supercooling is greater than or equal to the preset supercooling threshold.

[0060] Furthermore, in the embodiments of this application, after step 201 above, the variable flow control method based on subcooling provided in the embodiments of this application may further include the following step 203:

[0061] Step 203: If the current subcooling degree is greater than or equal to the preset subcooling degree threshold, maintain the current operating state of the air conditioner unchanged.

[0062] For example, if the current subcooling is greater than or equal to the preset subcooling threshold, no operation can be performed, and the room temperature can be allowed to decrease.

[0063] For example, such as Figure 3 As shown, this is a distributor connected to the throttling unit. The distributor can be an integral part of the throttling unit or a separate unit. When the subcooling level of the air conditioner is low, the subcooling level can be increased by adjusting the distribution method of the distributor. Adjustment methods include: changing from single-path distribution to dual-path distribution, or vice versa.

[0064] based on Figure 3 ,like Figure 4 As shown, the two branch pipes (including pipe A and pipe B) of the distributor can be connected to two pipes on the outdoor heat exchanger respectively, so that the branching method can be adjusted.

[0065] The variable flow control method based on subcooling provided in this application first determines whether the current ambient temperature meets the user's needs when the air conditioner is in cooling mode and operating stably. Then, if the current ambient temperature does not meet the user's needs, the current subcooling is calculated, and a first control strategy and a second control strategy are executed sequentially based on the current subcooling until a preset condition is met. The first control strategy adjusts the fan speed of the indoor unit; the second control strategy adjusts the flow distribution mode of the flow divider. The flow distribution mode of the flow divider includes single-path flow division and dual-path flow division. The preset condition includes an increase in subcooling. One end of the flow divider is connected to a throttling unit, and the other end is connected to a heat exchanger on the outdoor unit. Thus, when the heat exchange capacity decreases, the heat exchange capacity can be increased by changing the flow distribution mode, avoiding increased power consumption and poor cooling effect during air conditioner self-cleaning.

[0066] It should be noted that the execution subject of the supercooling degree-based variable flow control method provided in the embodiments of the present application can be a supercooling degree-based variable flow control device, or a control module in the supercooling degree-based variable flow control device for executing the supercooling degree-based variable flow control method. In the embodiments of the present application, the supercooling degree-based variable flow control method is executed by the supercooling degree-based variable flow control device as an example, and the supercooling degree-based variable flow control device provided in the embodiments of the present application is described.

[0067] It should be noted that the supercooling degree-based variable flow control method shown in each method figure in the embodiments of the present application is described by way of example in combination with one figure in the embodiments of the present application. In specific implementation, the supercooling degree-based variable flow control method shown in each method figure can also be implemented in combination with any other figure that can be combined as described in the above embodiments, which will not be described herein again.

[0068] The supercooling degree-based variable flow control device provided in the present application is described below, and the supercooling degree-based variable flow control method described below can be correspondingly referred to the supercooling degree-based variable flow control method described above.

[0069] Figure 5 The structure diagram of the supercooling degree-based variable flow control device provided in an embodiment of the present application is shown in FIG. 1, which specifically includes: Figure 5

[0070] The judgment module 501 is configured to judge whether the current environment temperature meets the user demand when the air conditioner is in the refrigeration mode and in the stable operation state. The calculation module 502 is configured to calculate the current supercooling degree when the current environment temperature cannot meet the user demand. The control module 503 is configured to sequentially execute the first control strategy and the second control strategy based on the current supercooling degree until a preset condition is met. The first control strategy is to adjust the fan rotating speed of the indoor unit. The second control strategy is to adjust the flow distribution mode of the flow distributor. The flow distribution mode of the flow distributor includes single-path flow distribution and double-path flow distribution. The preset condition includes supercooling degree increase. One end of the flow distributor is connected with the throttling unit, and the other end is connected with the heat exchanger on the outdoor unit.

[0071] Optionally, the device further includes an acquisition module. The acquisition module is configured to acquire the current environment temperature in the room and the set temperature of the air conditioner. The calculation module 502 is further configured to calculate the temperature difference between the current environment temperature and the set temperature. The judgment module 501 is specifically configured to determine that the current environment temperature cannot meet the user demand if the temperature difference is greater than a preset difference, and otherwise, the current environment temperature can meet the user demand.

[0072] ​Optionally, the obtaining module is further configured to obtain an outlet gas pressure of the condenser and a liquid temperature at the outlet of the condenser; the calculation module 502 is specifically configured to determine a saturation temperature by table lookup based on the outlet gas pressure; and the calculation module 502 is further configured to calculate a difference between the saturation temperature and the liquid temperature to obtain the current supercooling degree.

[0073] Optionally, the control module 503 is specifically configured to execute the first control strategy when the current supercooling degree is less than a preset supercooling degree threshold, and determine whether the preset condition is met after a first preset time length; and the control module 503 is further configured to stop executing the first control strategy when the supercooling degree of the air conditioner is greater than or equal to the preset supercooling degree threshold if the preset condition is met.

[0074] Optionally, the control module 503 is specifically configured to execute the second control strategy if the preset condition is not met, and determine whether the preset condition is met after a second preset time length; and the control module 503 is further configured to stop executing the second control strategy when the supercooling degree of the air conditioner is greater than or equal to the preset supercooling degree threshold if the preset condition is met.

[0075] Optionally, the control module 503 is further configured to keep the current running state of the air conditioner unchanged when the current supercooling degree is greater than or equal to the preset supercooling degree threshold.

[0076] The variable split control device based on supercooling degree provided in the application first determines whether the current environment temperature meets the user demand when the air conditioner is in the refrigeration mode and in the stable running state, then calculates the current supercooling degree when the current environment temperature cannot meet the user demand, and executes the first control strategy and the second control strategy based on the current supercooling degree in sequence until the preset condition is met; the first control strategy is adjusting the fan rotating speed of the indoor unit; the second control strategy is adjusting the split mode of the splitter; the split mode of the splitter includes single-path split and double-path split; the preset condition includes supercooling degree increase; one end of the splitter is connected with the throttling unit, and the other end is connected with the heat exchanger on the outdoor unit. In this way, when the heat exchange capacity decreases, the heat exchange capacity can be increased by changing the split mode, so as to avoid the situation that the power consumption increases and the refrigeration effect is poor when the air conditioner is self-cleaning.

[0077] Figure 6 An example of a schematic diagram of the physical structure of an electronic device is shown, which can be the above-mentioned air conditioner, as shown in Figure 6As shown, the electronic device can include a processor 610, a communications interface 620, a memory 630, and a communications bus 640, wherein the processor 610, the communications interface 620, and the memory 630 complete mutual communication through the communications bus 640. The processor 610 can invoke a logic instruction in the memory 630 to execute a variable flow control method based on supercooling degree, which includes: first, in the case that the air conditioner is in a cooling mode and is in a stable running state, judging whether the current environment temperature meets the user demand; then, in the case that the current environment temperature cannot meet the user demand, calculating the current supercooling degree, and sequentially executing a first control strategy and a second control strategy based on the current supercooling degree until a preset condition is met; wherein the first control strategy is to adjust the fan rotating speed of the indoor unit; the second control strategy is to adjust the flow distribution mode of the flow distributor; the flow distribution mode of the flow distributor includes single-path flow distribution and double-path flow distribution; the preset condition includes supercooling degree increase; one end of the flow distributor is connected with the throttling unit, and the other end is connected with the heat exchanger on the outdoor unit. In this way, when the heat exchange capacity decreases, the heat exchange capacity can be increased by changing the flow distribution mode, thereby avoiding the case that the power consumption increases and the refrigeration effect is poor when the air conditioner is self-cleaning.

[0078] In addition, the logic instruction in the memory 630 described above can be implemented in the form of a software function unit and sold or used as an independent product, which can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present application. The foregoing 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.

[0079] In another aspect, the present application also provides a computer program product, which comprises a computer program stored on a computer readable storage medium, and the computer program comprises program instructions, when the program instructions are executed by a computer, the computer can execute the variable split control method based on the supercooling degree provided by the above method, which comprises: first, when the air conditioner is in the refrigeration mode and in the stable running state, judging whether the current environment temperature meets the user demand; then, when the current environment temperature cannot meet the user demand, calculating the current supercooling degree, and sequentially executing the first control strategy and the second control strategy based on the current supercooling degree until the preset condition is met; wherein the first control strategy is to adjust the fan speed of the indoor unit; the second control strategy is to adjust the split mode of the splitter; the split mode of the splitter comprises single split and double split; the preset condition comprises supercooling degree increase; one end of the splitter is connected with the throttling unit, and the other end is connected with the heat exchanger on the outdoor unit. In this way, when the heat exchange capacity decreases, the heat exchange capacity can be increased by changing the split mode, thereby avoiding the situation that the power consumption increases and the refrigeration effect is poor when the air conditioner is self-cleaning.

[0080] In another aspect, the present application also provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the variable split control method based on the supercooling degree provided by the above method, which comprises: first, when the air conditioner is in the refrigeration mode and in the stable running state, judging whether the current environment temperature meets the user demand; then, when the current environment temperature cannot meet the user demand, calculating the current supercooling degree, and sequentially executing the first control strategy and the second control strategy based on the current supercooling degree until the preset condition is met; wherein the first control strategy is to adjust the fan speed of the indoor unit; the second control strategy is to adjust the split mode of the splitter; the split mode of the splitter comprises single split and double split; the preset condition comprises supercooling degree increase; one end of the splitter is connected with the throttling unit, and the other end is connected with the heat exchanger on the outdoor unit. In this way, when the heat exchange capacity decreases, the heat exchange capacity can be increased by changing the split mode, thereby avoiding the situation that the power consumption increases and the refrigeration effect is poor when the air conditioner is self-cleaning.

[0081] The device embodiments described above are only schematic, wherein the units shown as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the present embodiment scheme. Those skilled in the art can understand and implement without creative labor.

[0082] Those skilled in the art can clearly understand the implementation of the embodiments by means of software and necessary general hardware platforms through the description of the above embodiments, and of course, the embodiments can also be implemented by hardware. Based on such understanding, the above technical solutions can be embodied in the form of a software product, and the computer software product can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0083] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A subcooling based variable split control method, characterized by, The application relates to a control unit applied to an air conditioner, and the method comprises the following steps: In the case that the air conditioner is in a refrigeration mode and in a stable running state, it is judged whether the current environment temperature meets the user demand; In the case that the current environment temperature cannot meet the user demand, the current supercooling degree is calculated, and a first control strategy and a second control strategy are sequentially executed based on the current supercooling degree until a preset condition is met; The first control strategy is adjusting the fan rotating speed of an indoor unit; the second control strategy is adjusting the shunt mode of a shunt device; the shunt mode of the shunt device comprises single-path shunting and double-path shunting; the preset condition comprises supercooling degree increase; one end of the shunt device is connected with a throttling unit, and the other end is connected with a heat exchanger on an outdoor unit; two shunt pipes of the shunt device are respectively connected with two pipelines on the outdoor heat exchanger.

2. The method of claim 1, wherein, The judgment of whether the current environment temperature meets the user demand comprises the following steps: The current indoor environment temperature and the set temperature of the air conditioner are acquired, and the temperature difference between the current indoor environment temperature and the set temperature is calculated; if the temperature difference is greater than a preset difference value, it is determined that the current environment temperature cannot meet the user demand; otherwise, the current environment temperature can meet the user demand.

3. The method of claim 1, wherein, The calculation of the current supercooling degree comprises the following steps: The outlet gas pressure of a condenser and the liquid temperature at the outlet of the condenser are acquired, and the saturation temperature is determined by table lookup based on the outlet gas pressure; The difference between the saturation temperature and the liquid temperature is calculated to obtain the current supercooling degree.

4. The method of claim 1, wherein, The sequential execution of the first control strategy and the second control strategy based on the current supercooling degree until the preset condition is met comprises the following steps: In the case that the current supercooling degree is less than a preset supercooling degree threshold, the first control strategy is executed, and whether the preset condition is met is judged after a first preset time length; If the preset condition is met, the first control strategy is stopped in the case that the supercooling degree of the air conditioner is greater than or equal to the preset supercooling degree threshold.

5. The method of claim 4, wherein, The sequential execution of the first control strategy and the second control strategy based on the current supercooling degree until the preset condition is met comprises the following steps: If the preset condition is not met, the second control strategy is executed, and whether the preset condition is met is judged after a second preset time length; If the preset condition is met, the second control strategy is stopped in the case that the supercooling degree of the air conditioner is greater than or equal to the preset supercooling degree threshold.

6. The method according to claim 4 or 5, characterized in that, After the judgment of whether the current environment temperature meets the user demand, the method further comprises the following step: In the case that the current supercooling degree is greater than or equal to the preset supercooling degree threshold, the current running state of the air conditioner is kept unchanged.

7. A subcooling based variable split control device, characterized by, The device comprises: A judgment module is used for judging whether the current environment temperature meets the user demand in the case that the air conditioner is in a refrigeration mode and in a stable running state; A calculation module is used for calculating the current supercooling degree in the case that the current environment temperature cannot meet the user demand; A control module is used for sequentially executing a first control strategy and a second control strategy based on the current supercooling degree until a preset condition is met. The first control strategy is adjusting a fan rotating speed of the indoor unit; the second control strategy is adjusting a shunt mode of the shunt; the shunt mode of the shunt includes single-path shunting and double-path shunting; the preset condition includes supercooling degree increase; one end of the shunt is connected with the throttling unit, and the other end is connected with a heat exchanger on the outdoor unit; two shunt pipes of the shunt are respectively connected with two pipelines on the outdoor heat exchanger.

8. The apparatus of claim 7, wherein, The control module is specifically configured to execute the first control strategy when the current supercooling degree is less than a preset supercooling degree threshold, and determine whether the preset condition is met after a first preset time length; The control module is specifically configured to stop executing the first control strategy when the supercooling degree of the air conditioner is greater than or equal to the preset supercooling degree threshold if the preset condition is met.

9. An air conditioner characterized by comprising: A computer program product comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the supercooling degree-based variable shunt control method according to any one of claims 1 to 6 when executing the program.

10. A computer-readable storage medium, characterized in that, A computer program product comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the supercooling degree-based variable shunt control method according to any one of claims 1 to 6 when executing the program.

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