[0022] The following description and drawings fully illustrate specific embodiments of the present invention to enable those skilled in the art to practice them. Other implementations may include structural, logical, electrical, process, and other changes. The examples only represent possible changes. Unless explicitly required, individual components and functions are optional, and the order of operations can be changed. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. The scope of the embodiments of the present invention includes the entire scope of the claims, and all available equivalents of the claims. In this document, each embodiment may be individually or collectively denoted by the term "invention", this is only for convenience, and if more than one invention is actually disclosed, it is not intended to automatically limit the scope of the application to any A single invention or inventive concept. In this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not require or imply any actual relationship or relationship between these entities or operations. order. Moreover, the terms "including", "including" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method or device including a series of elements includes not only those elements, but also other elements not explicitly listed. Elements, or also include elements inherent to the process, method, or equipment. If there are no more restrictions, the element defined by the sentence "includes a..." does not exclude the existence of other same elements in the process, method, or device that includes the element. The various embodiments herein are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. For the methods, products, etc. disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method section.
[0023] In the prior art, the air-conditioning system prevents liquid hammer from the compressor of the air-conditioning system by adjusting the operating parameters of the air-conditioning system, such as adjusting the operating frequency of the compressor and adjusting the opening of the expansion valve, but no matter which operating parameters are adjusted, Both are different from the current adjustment of the air-conditioning system, which will inevitably cause changes in the cooling or heating effect, that is, it cannot meet user needs and reduce user experience. Moreover, for an air conditioning system using a fixed-frequency compressor, the frequency of the fixed-frequency compressor is fixed, and the valve opening cannot be adjusted. In the prior art, it is impossible to prevent liquid hammer from occurring in the air-conditioning system using the fixed-frequency compressor.
[0024] In the embodiment of the present invention, changes are made in the structure of the air conditioning system. An annular heating device is arranged around the outer wall of the compressor at a set distance from the bottom of the compressor, or a heating device is arranged at the bottom of the compressor to cover the outer wall of the compressor, or An annular heating device is set at the bottom. When there is a possibility of liquid hammer, turn on the heating device to heat the compressor to prevent the refrigerant from condensing inside the compressor, that is, liquid hammer. In the embodiment of the present invention, by changing the structure of the air conditioning system, it can be applied not only to the air conditioning system using fixed frequency compressors, but also to the air conditioning system of inverter compressor systems. The structural changes can achieve liquid strike prevention. , To avoid conflicts with other control processes when adjusting the air conditioning operating parameters, affecting the cooling or heating effect, and reducing the user experience.
[0025] figure 1 It is a flow chart showing a control method for preventing liquid shock in an air conditioning system according to an exemplary embodiment. The method includes the following steps:
[0026] Step S101: Obtain temperature data, and determine whether the temperature data meets a preset condition for performing an anti-liquid strike operation.
[0027] Step S102: If the preset condition is met, control the electric heating device to turn on.
[0028] In this embodiment, the preset condition is the specific value of one or more temperature parameters when liquid hammer occurs based on multiple tests, which are pre-stored in the air conditioning system. Temperature data can include: indoor temperature, outdoor temperature, condenser temperature, evaporator temperature, compressor temperature, etc. It is understandable that the temperature data is not limited to the above-mentioned temperature parameters, and may be other temperature-causing parameters. The multiple temperature parameters can be any combination of temperature parameters that can predict whether liquid hammer occurs.
[0029] In this embodiment, there are many ways to obtain temperature data. Optionally, it is measured by the temperature sensor that comes with the air conditioning system, or the temperature data detected by other devices is obtained through networking, or through other data. Calculate to obtain a certain temperature data.
[0030] When the acquired temperature data satisfies the preset conditions for performing the anti-liquid-shock operation, it is determined that the liquid-shock will occur if the air conditioner maintains the current operating state and continues to run. The operation of preventing liquid shock is required. At this time, the electric heating device is controlled to turn on to increase the temperature of the compressor to avoid condensation of the refrigerant in the compressor and extend the life of the compressor.
[0031] According to the embodiment of the present invention, it is determined whether the liquid-shock prevention operation is required according to the temperature data obtained in real time. When the liquid-shock prevention operation is required, the electric heating device is turned on. The adjustment process is simple and can effectively avoid the occurrence of a compressor with a fixed frequency in time. Liquid strike.
[0032] In order to improve the accuracy of adjustment, the temperature parameters in the preset conditions must be directly related to the occurrence of liquid hammer.
[0033] In some optional embodiments, the temperature data includes: compressor bottom temperature T1 and condenser middle temperature T2. The preset condition includes: the difference ΔH of the compressor bottom temperature T1 minus the condenser middle temperature T2 is less than the first set value H1.
[0034] Wherein, the first set value H1 ranges from 2 to 6°C, the first set value H1 is 2°C, 3°C, 4°C, 5°C, or 6°C, and the first set value The value of H1 is related to the target setting temperature of the air conditioner.
[0035] Such as figure 2 What is shown is a flow chart showing a control method for preventing liquid shock in an air conditioning system according to an exemplary embodiment. The method includes the following steps:
[0036] Step S201: Obtain the bottom temperature T1 of the compressor and the middle temperature T2 of the condenser;
[0037] Step S202: Determine whether the difference ΔH of the compressor bottom temperature T1 minus the condenser middle temperature T2 is less than the first set value H1; if the judgment result is less than the first set value H1, perform step S203, control The electric heating device is turned on.
[0038] According to the bottom temperature T1 of the compressor, the amount of liquid refrigerant in the compressor can be judged, and the heat exchange capacity of the condenser can be judged according to the temperature T2 of the middle of the condenser, and the amount of refrigerant output by the condenser can be determined. According to the temperature of the bottom of the compressor T1 and the temperature of the middle of the condenser T2 can determine whether the amount of refrigerant output by the compressor matches the heat exchange capacity of the evaporator. When the difference ΔH of the compressor bottom temperature T1 minus the condenser middle temperature T2 is less than the first set value H1, the amount of output refrigerant does not match the heat exchange capacity of the evaporator, and the evaporator cannot guarantee the full evaporation of the liquid refrigerant. The liquid refrigerant will flow back to the compressor, and as the air conditioner is running, liquid shock will occur and damage the compressor.
[0039] In step S203, when the temperature T1 at the bottom of the compressor and the temperature T2 at the middle of the condenser meet the preset conditions for performing the liquid strike prevention operation, there are many ways to control the electric heating device to turn on. In order to avoid the excessive power of the electric heating device and wasting power when the liquid strike can be prevented, in different embodiments, the electric heating device is provided with different heating levels or the power of the electric heating device is adjustable.
[0040] Optionally, the controlling the electric heating device to turn on includes: determining the heating level of the electric heating device according to the difference ΔH; and controlling the electric heating device to operate at the heating level.
[0041] In some optional embodiments, the electric heating device is provided with different heating levels, and the heating level for turning on the electric heating device is determined according to the difference ΔH. For example: the electric heating device is divided into high-end, middle-end and low-end; when ΔH is greater than the first set value H1 and less than or equal to the fourth set value, turn on low-end heating; when ΔH is greater than the fourth set value and less than or equal to the fourth set value When the setting value is five, the mid-range heating is turned on; when ΔH is greater than the fifth setting value, the high-end heating is turned on; among them, the first setting value is greater than the fourth setting value, and the fourth setting value is greater than the fifth setting value.
[0042] Optionally, the controlling the electric heating device to turn on includes: determining the target power of the electric heating device according to the difference ΔH and the first set value H1; and controlling the electric heating device to operate at the target power.
[0043] In some optional embodiments, the power of the electric heating device is adjustable, the power of the electric heating device is calculated according to the difference between the difference ΔH and the first set value H1, and the electric heating device is adjusted to the determined power.
[0044] image 3 Shown is a schematic structural diagram of an air conditioner according to an exemplary embodiment. Such as image 3 As shown, the air conditioner 100 includes a plurality of temperature sensors, a microcontroller 301 and a heating device 302. The microcontroller 301 includes a data unit 3011, a judgment unit 3012 and a control unit 3013.
[0045] The data unit 3011 is used to obtain temperature data detected by each temperature sensor, and the temperature data includes temperature data detected by each temperature sensor (as shown in the figure, temperature sensor 1, temperature sensor 2, ..., temperature sensor n).
[0046] In some optional embodiments, the data unit 3011 is used to obtain temperature data detected by other devices through networking, or the data unit 3011 is used to obtain a certain temperature data through other data calculations.
[0047] The judging unit 3012 is configured to judge whether the temperature data acquired by the data unit 3011 meets the preset conditions for performing the liquid-strike prevention operation.
[0048] The control unit 3013 is configured to control the electric heating device to turn on when the temperature data meets the preset condition.
[0049] According to the embodiment of the present invention, it is determined whether the liquid-shock prevention operation is required according to the temperature data obtained in real time. When the liquid-shock prevention operation is required, the electric heating device is turned on. The adjustment process is simple and can effectively avoid the occurrence of a compressor with a fixed frequency in time. Liquid strike.
[0050] Such as Figure 4 Shown is a schematic structural diagram of an air conditioner according to an exemplary embodiment. Such as Figure 4 As shown, the air conditioner 200 includes: a microcontroller 401, a heating device 402, a first temperature sensor 403 and a second temperature sensor 404. Among them, the microcontroller 401 includes a data unit 4011, a judgment unit 4012, and a control unit 4013.
[0051] The first temperature sensor 403 is used to detect the bottom temperature T1 of the compressor.
[0052] The second temperature sensor 404 is used to detect the temperature T2 in the middle of the condenser.
[0053] The data unit 4011 is used to obtain the compressor bottom temperature T1 detected by the first temperature sensor 403 and the condenser middle temperature T2 detected by the second temperature sensor 404.
[0054] The judging unit 4012 is used to judge whether the difference ΔH of the compressor bottom temperature T1 minus the condenser middle temperature T2 is less than the first set value H1.
[0055] The control unit 4013 is configured to control the electric heating device to turn on when the difference ΔH is less than the first set value H1.
[0056] There are many ways for the control unit 4013 to control the turning on of the electric heating device. In order to avoid the excessive power of the electric heating device and wasting power when the liquid strike can be prevented, in different embodiments, the electric heating device is provided with different heating levels or the power of the electric heating device is adjustable.
[0057] In some optional embodiments, the control unit 4013 specifically includes: a first determination unit and a first control unit.
[0058] Optionally, the electric heating device is provided with different heating levels, the first determining unit is used to determine the heating level for turning on the electric heating device according to the difference ΔH, and the first control unit is used to determine the heating level determined by the first determining unit Turn on the electric heating device. For example: the electric heating device is divided into high-end, middle-end and low-end; when ΔH is greater than the first set value H1 and less than or equal to the fourth set value, turn on low-end heating; when ΔH is greater than the fourth set value and less than or equal to the fourth set value When the setting value is five, the mid-range heating is turned on; when ΔH is greater than the fifth setting value, the high-end heating is turned on; among them, the first setting value is greater than the fourth setting value, and the fourth setting value is greater than the fifth setting value.
[0059] Optionally, the power of the electric heating device is adjustable, and the first determining unit is configured to calculate the power of the electric heating device according to the difference between the difference ΔH and the first set value H1, and the first control unit is configured to calculate the power of the electric heating device according to the first The calculation result of the determining unit adjusts the electric heating device to the determined power.
[0060] In an exemplary embodiment, there is also provided a non-transitory computer-readable storage medium including instructions, such as a memory including instructions, which can be executed by a processor to complete the aforementioned method. The aforementioned non-transitory computer-readable storage medium may be a read only memory (Read Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic tape, an optical storage device, and the like.
[0061] A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods for each specific application to implement the described functions, but such implementation should not be considered as going beyond the scope of the present invention. Those skilled in the art can clearly understand that, for convenience and concise description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.
[0062] In the embodiments disclosed herein, it should be understood that the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments. In addition, the functional units in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
[0063] It should be understood that the present invention is not limited to the processes and structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.
