Method, device and air conditioner for adjusting refrigerant circulation amount of heat exchanger of air conditioner

Abstract

This application relates to the technical field of air conditioners, for example, to a method, a device and an air conditioner for adjusting the refrigerant circulation amount of a heat exchanger of an air conditioner. The heat exchanger of the air conditioner includes a heat exchanger body and a liquid storage element. The heat exchanger body includes a first heat exchange part, a second heat exchange part and a third heat exchange part that are connected in series and communicated in sequence. The liquid storage element includes a liquid inlet pipe, a liquid outlet pipe and a refrigerant amount adjusting pipe arranged at the bottom of the liquid storage element. A first solenoid valve is arranged on the refrigerant amount adjusting pipe. The heat exchange pipe of the first heat exchange part is communicated with the liquid inlet pipe. The liquid storage element is used for partially storing the refrigerant flowing out of the heat exchange pipe of the first heat exchange part and then flowing into the second heat exchange part through the liquid outlet pipe. The refrigerant amount adjusting pipe is communicated with the refrigerant outlet of the third heat exchange part. Under different load operation states, the liquid storage element adjusts the refrigerant amount entering the refrigerant outlet of the third heat exchange part, thereby adjusting the refrigerant circulation amount of the air conditioner and improving the energy efficiency of the air conditioner.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and for example, relates to a method, a device, and an air conditioner for adjusting the refrigerant circulation amount of a heat exchanger of an air conditioner. Background Art

[0002] For air conditioners, such as air source heat pump multi-connected unit air conditioners, the refrigerant amount matching the rated power is usually fixedly charged. However, the operating environment temperature range of the air conditioner is relatively large, and the load change difference of the air conditioner is also relatively large. The refrigerant circulation amount required by the air source heat pump system is related to the operating ambient temperature and the load state. Under different operating ambient temperatures and different loads, the refrigerant circulation amount required by the air source heat pump system is different. The fixedly charged refrigerant amount makes the refrigerant circulation amount of the air conditioner unable to be adjusted under different operating loads, reducing the energy efficiency of the air conditioner.

[0003] In the prior art, a refrigerant storage device is added between the indoor heat exchanger and the outdoor heat exchanger to adjust the refrigerant circulation amount of the air conditioner under different operating loads.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

[0005] In the method of adding a refrigerant storage device between the indoor heat exchanger and the outdoor heat exchanger to adjust the refrigerant circulation amount of the air conditioner under different operating loads, solenoid valves, capillary tubes and other valve body components need to be added at both ends of the refrigerant storage device, resulting in an increase in the pipeline cost of the air conditioner and a complex control process. Summary of the Invention

[0006] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. The summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments, but rather serves as a preface to the subsequent detailed description.

[0007] The embodiments of the present disclosure provide a method, a device, and an air conditioner for adjusting the refrigerant circulation amount of a heat exchanger of an air conditioner, so as to solve the problem that in the method of adding a refrigerant storage device between the indoor heat exchanger and the outdoor heat exchanger to adjust the refrigerant circulation amount of the air conditioner under different operating loads, solenoid valves, capillary tubes and other valve body components need to be added at both ends of the refrigerant storage device, resulting in an increase in the pipeline cost of the air conditioner.

[0008] The embodiments of the present disclosure provide a method for adjusting the refrigerant circulation amount of a heat exchanger of an air conditioner.

[0009] In some embodiments, in the method for adjusting the refrigerant circulation amount of the heat exchanger of an air conditioner, the heat exchanger of the air conditioner includes a heat exchanger body and a liquid storage element. The heat exchanger body includes a first heat exchange part, a second heat exchange part, and a third heat exchange part that are connected in series and communicated in sequence. The liquid storage element includes a liquid inlet pipe, a liquid outlet pipe, and a refrigerant amount adjustment pipe provided at the bottom of the liquid storage element. The refrigerant amount adjustment pipe is provided with a first solenoid valve. The heat exchange pipe of the first heat exchange part is connected to the liquid inlet pipe. The liquid storage element is used for partially storing the refrigerant flowing out of the heat exchange pipe of the first heat exchange part and then flowing into the second heat exchange part of the heat exchanger body through the liquid outlet pipe. The refrigerant amount adjustment pipe is connected to the refrigerant outlet of the third heat exchange part.

[0010] The method for adjusting the refrigerant circulation amount of the heat exchanger of an air conditioner includes: determining the target liquid level of the liquid storage element according to the temperature difference between the outdoor ambient temperature and the indoor ambient temperature; adjusting the opening degree of the first solenoid valve according to the liquid level difference between the actual liquid level and the target liquid level of the liquid storage element so as to adjust the refrigerant amount flowing into the outlet of the third heat exchange part.

[0011] Optionally, determining the target liquid level of the liquid storage element according to the temperature difference between the outdoor ambient temperature and the indoor ambient temperature includes: controlling the first solenoid valve to close when the air conditioner is turned on; after the duration after the air conditioner is turned on is greater than or equal to the first preset duration, the air conditioner enters the startup stable stage, and the outdoor ambient temperature and the indoor ambient temperature in the startup stable stage are obtained; determining the first target liquid level of the liquid storage element according to the temperature difference between the outdoor ambient temperature and the indoor ambient temperature in the startup stable stage.

[0012] Optionally, adjusting the opening degree of the first solenoid valve according to the liquid level difference between the actual liquid level and the target liquid level of the liquid storage element so as to adjust the refrigerant amount flowing into the outlet of the third heat exchange part includes: obtaining the first actual liquid level of the liquid storage element in the startup stable stage, and when the liquid level difference between the first actual liquid level and the first target liquid level is greater than or equal to the first preset liquid level difference, performing a large adjustment on the first solenoid valve so as to greatly adjust the refrigerant amount flowing into the outlet of the third heat exchange part.

[0013] Optionally, after performing a large adjustment on the first solenoid valve, it further includes: the air conditioner enters the operation stable stage, and the second actual liquid level and the second target liquid level of the liquid storage element in the operation stable stage are obtained; performing a fine adjustment on the first solenoid valve according to the liquid level difference between the second actual liquid level and the second target liquid level so as to slightly adjust the refrigerant amount flowing into the outlet of the third heat exchange part.

[0014] Optionally, after performing a fine adjustment on the first solenoid valve, it further includes: determining the interval duration for obtaining the actual liquid level and the target liquid level of the liquid storage element in the next cycle according to the fine adjustment amplitude of the first solenoid valve.

[0015] Optionally, when the fine-tuning amplitude of the first solenoid valve is greater than or equal to the first preset amplitude, the actual liquid level and the target liquid level of the liquid storage element in the next cycle are obtained after the first interval duration; when the fine-tuning amplitude of the first solenoid valve is less than the first preset amplitude, the actual liquid level and the target liquid level of the liquid storage element in the next cycle are obtained after the second interval duration. Among them, the first interval duration is greater than the second interval duration.

[0016] Optionally, the first preset duration is greater than the first interval duration.

[0017] The embodiments of the present disclosure also provide a device for adjusting the refrigerant circulation amount of the heat exchanger of an air conditioner.

[0018] In some embodiments, in the device for adjusting the refrigerant circulation amount of the heat exchanger of an air conditioner, the heat exchanger includes a heat exchanger body and a liquid storage element. The heat exchanger body includes a first heat exchange part, a second heat exchange part, and a third heat exchange part that are connected in series and communicated in sequence. The liquid storage element includes a liquid inlet pipe, a liquid outlet pipe, and a refrigerant amount adjustment pipe provided at the bottom of the liquid storage element. The refrigerant amount adjustment pipe is provided with a first solenoid valve. The heat exchange pipe of the first heat exchange part is connected to the liquid inlet pipe. The liquid storage element is used to partially store the refrigerant flowing out of the heat exchange pipe of the first heat exchange part and then flow into the second heat exchange part of the heat exchanger body through the liquid outlet pipe. The refrigerant amount adjustment pipe is connected to the refrigerant outlet of the third heat exchange part.

[0019] The device for adjusting the refrigerant circulation amount of the heat exchanger of an air conditioner includes a liquid level acquisition module and a refrigerant adjustment module. The liquid level acquisition module is configured to determine the target liquid level of the liquid storage element according to the temperature difference between the outdoor ambient temperature and the indoor ambient temperature. The refrigerant adjustment module is configured to adjust the opening degree of the first solenoid valve according to the liquid level difference between the actual liquid level and the target liquid level of the liquid storage element, so as to adjust the refrigerant amount flowing into the outlet of the third heat exchange part.

[0020] In some embodiments, the device for adjusting the refrigerant circulation amount of the heat exchanger of an air conditioner includes a processor and a memory storing program instructions. The processor is configured to execute the method for adjusting the refrigerant circulation amount of the heat exchanger of an air conditioner when running the program instructions.

[0021] The embodiments of the present disclosure also provide an air conditioner, including the device for adjusting the refrigerant circulation amount of the heat exchanger of the air conditioner as described above.

[0022] The method, device, and air conditioner for adjusting the refrigerant circulation amount of the heat exchanger of an air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0023] The method for adjusting the refrigerant circulation amount of the heat exchanger of the air conditioner provided by the embodiments of the present disclosure sets a liquid storage element between different heat exchange parts of the heat exchanger body. After the liquid storage element partially stores the gas-liquid two-phase refrigerant flowing out from the first heat exchange part, the remaining refrigerant flows into the second heat exchange part and the third heat exchange part of the heat exchanger body to continue participating in heat exchange. Under different load operating states, the liquid storage element adjusts the amount of refrigerant at the outlet of the refrigerant entering the third heat exchange part, thereby adjusting the refrigerant circulation amount of the air conditioner and improving the energy efficiency of the air conditioner under different load operating states.

[0024] The above general description and the following description are only exemplary and explanatory, and are not used to limit the present application. Brief Description of the Drawings

[0025] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a proportional limitation, and among them:

[0026] Figure 1 is a schematic structural diagram of an air conditioner provided by an embodiment of the present disclosure;

[0027] Figure 2 is a schematic structural diagram of a heat exchanger provided by an embodiment of the present disclosure;

[0028] Figure 3 is a schematic diagram of the refrigerant flow path of a heat exchanger as a condenser provided by an embodiment of the present disclosure;

[0029] Figure 4 is a schematic flowchart of a method for adjusting the refrigerant circulation amount of the heat exchanger of the air conditioner provided by an embodiment of the present disclosure;

[0030] Figure 5 is a schematic diagram of a device for adjusting the refrigerant circulation amount of the heat exchanger of the air conditioner provided by an embodiment of the present disclosure;

[0031] Figure 6 is a schematic diagram of another device for adjusting the refrigerant circulation amount of the heat exchanger of the air conditioner provided by an embodiment of the present disclosure.

[0032] Reference Numerals:

[0033] 100: Processor; 101: Memory; 102: Communication Interface; 103: Bus;

[0034] 200: Liquid Level Acquisition Module;

[0035] 300: Refrigerant Regulation Module;

[0036] 1: Heat exchanger body; 11: First heat exchange part; 111: Heat exchange tube; 12: Second heat exchange part; 13: Third heat exchange part;

[0037] 2: Liquid storage element; 21: Liquid inlet pipe; 22: Liquid outlet pipe; 23: Refrigerant quantity adjustment pipe;

[0038] 3: First solenoid valve;

[0039] 4: Compressor;

[0040] 5: Four-way valve;

[0041] 6: Indoor heat exchanger;

[0042] 7: Throttling element. Detailed implementation mode

[0043] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference and illustration purposes only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, numerous details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices may be shown in a simplified manner to simplify the drawings.

[0044] In the embodiments of the present disclosure, the terms "first", "second", etc. in the description and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0045] In the embodiments of the present disclosure, the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their embodiments and are not used to limit that the indicated devices, elements or components must have a specific orientation or be constructed and operated in a specific orientation. And, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0046] In addition, the terms "arranged", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components, or constituent parts. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0047] Unless otherwise specified, the term "plurality" means two or more.

[0048] In the embodiments of the present disclosure, the character " / " indicates that the objects before and after are in an "or" relationship. For example, A / B means: A or B.

[0049] The term "and / or" is an associative relationship describing an object, indicating that there can be three relationships. For example, A and / or B means: A or B, or, the three relationships of A and B.

[0050] It should be noted that, without conflict, the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0051] An air conditioner, such as an air source heat pump multi-connected unit type air conditioner, includes a refrigerant circulation system formed by sequentially connecting a compressor 4, an outdoor heat exchanger, a throttling element 7, and an indoor heat exchanger 6, as Figure 1 shown.

[0052] Taking the case of the outdoor heat exchanger under the refrigeration condition as an example, the heat exchanger mentioned in the following text will be described.

[0053] As Figure 2 shown, the heat exchanger of the air conditioner includes a heat exchanger body 1 and a liquid storage element 2. The heat exchanger body 1 includes a first heat exchange part 11, a second heat exchange part 12, and a third heat exchange part 13 that are sequentially connected in series and communicated. The liquid storage element 2 includes a liquid inlet pipe 21, a liquid outlet pipe 22, and a refrigerant amount regulating pipe 23 provided at the bottom of the liquid storage element 2. A first solenoid valve 3 is provided on the refrigerant amount regulating pipe 23. The heat exchange pipe 111 of the first heat exchange part 11 is communicated with the liquid inlet pipe 21. The liquid storage element 2 is used to partially store the refrigerant flowing out of the heat exchange pipe 111 of the first heat exchange part 11 and then flow into the second heat exchange part 12 of the heat exchanger body 1 through the liquid outlet pipe 22. The refrigerant amount regulating pipe 23 is communicated with the refrigerant outlet of the third heat exchange part 13.

[0054] According to the phase state of the refrigerant flowing in the heat exchanger body 1, the heat exchanger body 1 can be divided into a gaseous region, a liquid region, and a gas-liquid two-phase region. The heat exchange tubes 111 are located in the gas-liquid two-phase region of the heat exchanger body 1. Under different operating loads, the phase state of the refrigerant flowing in the refrigerant tubes of the heat exchanger body 1 may be different. The gas-liquid two-phase region provided by the embodiments of the present disclosure can be understood as that the refrigerant in the heat exchange tubes 111 is in a gas-liquid two-phase state under all operating loads.

[0055] Among them, the number of heat exchange tubes 111 of the first heat exchange part 11 can be one or more, such as 2, 3, or 4. Setting a plurality of heat exchange tubes 111 means setting a plurality of heat exchange branches, which can improve the heat exchange efficiency of the first heat exchange part 11.

[0056] Combined with Figure 3 , in the refrigeration condition, when the heat exchanger is used as a condenser, the refrigerant enters the first heat exchange part 11 of the heat exchanger body 1, and enters the liquid storage element 2 through the heat exchange tubes 111 and the liquid inlet pipe 21. After the liquid storage element 2 stores part of the refrigerant, the remaining refrigerant enters the second heat exchange part 12 and the third heat exchange part 13 in sequence through the liquid outlet pipe 22, and finally flows out of the heat exchanger to participate in the system cycle. The liquid storage element 2 adjusts the amount of liquid refrigerant stored in the liquid storage element 2 through the first solenoid valve 3. According to different load states of the air conditioner, the amount of liquid refrigerant stored in the liquid storage element 2 is adjusted. When the first solenoid valve 3 is opened, part of the liquid refrigerant enters the refrigerant outlet of the third heat exchange part 13 through the refrigerant amount adjustment pipe 23 to participate in the system cycle.

[0057] In the heat exchanger provided by the embodiments of the present disclosure, a liquid storage element 2 is arranged between different heat exchange parts of the heat exchanger body 1. After the liquid storage element 2 stores part of the refrigerant in the gas-liquid two-phase state flowing out of the first heat exchange part 11, the remaining refrigerant flows into the second heat exchange part 12 and the third heat exchange part 13 of the heat exchanger body 1 to continue participating in heat exchange. Under different load operating states, the liquid storage element 2 adjusts the amount of refrigerant entering the refrigerant outlet of the third heat exchange part 13, thereby adjusting the refrigerant circulation amount of the air conditioner and improving the energy efficiency of the air conditioner.

[0058] The embodiments of the present disclosure also provide a method for adjusting the refrigerant circulation amount of the heat exchanger of the air conditioner. Determine the target liquid level of the liquid storage element 2 according to the temperature difference between the outdoor ambient temperature and the indoor ambient temperature; adjust the opening degree of the first solenoid valve 3 according to the liquid level difference between the actual liquid level and the target liquid level of the liquid storage element 2 to adjust the amount of refrigerant flowing into the outlet of the third heat exchange part 13, as Figure 4 shown.

[0059] When the air conditioner operates in the refrigeration mode, including different refrigeration operating conditions such as rated refrigeration, intermediate refrigeration, and low-temperature refrigeration, the loads of these different refrigeration operating modes are different, and the optimal amount of refrigerant in the refrigerant circulation path required is also different.

[0060] When the air conditioner is operating under different load conditions, by adjusting the refrigerant storage amount of the liquid storage element 2, the refrigerant circulation amount in the heat exchanger body 1 is adjusted, that is, the refrigerant circulation amount of the air conditioner under different load conditions is adjusted, improving the energy efficiency of the air conditioner.

[0061] Optionally, determining the target liquid level of the liquid storage element 2 according to the temperature difference between the outdoor ambient temperature and the indoor ambient temperature includes: controlling the first solenoid valve 3 to close when the air conditioner is turned on; after the duration after the air conditioner is turned on is greater than or equal to the first preset duration, the air conditioner enters the stable startup stage, and the outdoor ambient temperature and the indoor ambient temperature in the stable startup stage are obtained; the first target liquid level of the liquid storage element 2 is determined according to the temperature difference between the outdoor ambient temperature and the indoor ambient temperature in the stable startup stage.

[0062] In one embodiment, the first preset duration is 5 to 10 minutes. For example, the first preset duration can be 5 minutes, 6 minutes, 7 minutes, 8 minutes, 9 minutes, 10 minutes, 11 minutes, 12 minutes, 13 minutes, 14 minutes or 15 minutes, etc. The detection range of the actual liquid level of the liquid storage element 2 is 0 to 100 mm, and the height of the first target liquid level in the liquid storage element 2 is determined according to the difference between the outdoor ambient temperature and the indoor ambient temperature, as shown in Table 1.

[0063] Indoor-outdoor temperature difference (°C) 0～2 2～4 4～6 6～8 8～10 ＞10 First target liquid level (mm) 75 60 45 30 15 10

[0064] Table 1

[0065] When the difference between the outdoor ambient temperature and the indoor ambient temperature is large, the air conditioner load is large, the first target liquid level in the liquid storage element 2 is adjusted to be smaller, so that less refrigerant is stored in the liquid storage element 2, and the refrigerant circulation amount in the air conditioner system increases. When the difference between the outdoor ambient temperature and the indoor ambient temperature is small, the air conditioner load is small, the first target liquid level in the liquid storage element 2 is adjusted to be larger, so that more refrigerant is stored in the liquid storage element 2, and the refrigerant circulation amount in the air conditioner system decreases. Adjusting different first target liquid levels of the liquid storage element 2 for different load operating conditions, and then adjusting the refrigerant circulation amount of the air conditioner, can effectively improve the energy efficiency of the air conditioner.

[0066] Optionally, under the conditions of different differences between the outdoor ambient temperature and the indoor ambient temperature, the foregoing "first target liquid level" and the following "second target liquid level" can be determined according to the corresponding relationship between the temperature difference and the liquid level in Table 1.

[0067] Optionally, according to the liquid level difference between the actual liquid level and the target liquid level of the liquid storage element 2, adjust the opening degree of the first solenoid valve 3 to adjust the amount of refrigerant flowing into the outlet of the third heat exchange part 13, including: obtaining the first actual liquid level of the liquid storage element 2 in the stable startup stage, and when the liquid level difference between the first actual liquid level and the first target liquid level is greater than or equal to the first preset liquid level difference, perform a large adjustment on the first solenoid valve 3 to greatly adjust the amount of refrigerant flowing into the outlet of the third heat exchange part 13.

[0068] In one embodiment, the first preset difference is 15 mm. When the liquid level difference between the first actual liquid level and the first target liquid level is greater than or equal to 15 mm, perform a large adjustment on the first solenoid valve 3, and the valve opening degree increases by 15 to 20 steps. For example, the valve opening degree increases by 15 steps, 16 steps, 17 steps, 18 steps, 19 steps, 20 steps, etc.

[0069] Optionally, after performing a large adjustment on the first solenoid valve 3, it further includes: the air conditioner enters the stable operation stage, obtain the second actual liquid level and the second target liquid level of the liquid storage element 2 in the stable operation stage; perform a fine adjustment on the first solenoid valve 3 according to the liquid level difference between the second actual liquid level and the second target liquid level to slightly adjust the amount of refrigerant flowing into the outlet of the third heat exchange part 13.

[0070] In one embodiment, the corresponding relationship between the opening degree of the first solenoid valve 3 and the liquid level difference is shown in Table 2. Wherein, the liquid level difference is obtained by subtracting the second target liquid level from the second actual liquid level.

[0071] Liquid level difference (mm) Valve opening (steps) ＜-15 -8 -15～-12 -6 -12～-9 -4 -9～-6 -2 -6～-3 -1 -3～3 0 3～6 1 6～9 2 9～12 4 12～15 6 ＞15 8

[0072] Table 2

[0073] Optionally, after performing a fine adjustment on the first solenoid valve 3, it further includes: according to the fine adjustment amplitude of the first solenoid valve 3, determine the interval duration for obtaining the actual liquid level and the target liquid level of the liquid storage element 2 in the next cycle.

[0074] Optionally, when the fine adjustment amplitude of the first solenoid valve 3 is greater than or equal to the first preset amplitude, obtain the actual liquid level and the target liquid level of the liquid storage element 2 in the next cycle after the first interval duration; when the fine adjustment amplitude of the first solenoid valve 3 is less than the first preset amplitude, obtain the actual liquid level and the target liquid level of the liquid storage element 2 in the next cycle after the second interval duration. Wherein, the first interval duration is greater than the second interval duration.

[0075] Optionally, the first preset duration is greater than the first interval duration.

[0076] In one embodiment, based on the absolute value of the valve opening, the first preset amplitude is 6 steps, the first interval time is 5 minutes, and the second interval time is 2 minutes. When the absolute value of the valve opening is greater than or equal to 6 steps, that is, when the amplitude of the valve opening being adjusted larger or smaller is greater than or equal to 6 steps, it is understood that a relatively large adjustment has been made to the refrigerant amount in the liquid storage element 2 this time, and the circulating refrigerant amount of the air conditioner changes significantly. After an interval of 5 minutes, the actual liquid level and the target liquid level of the liquid storage element 2 in the next cycle can be obtained. When the absolute value of the valve opening is less than 6 steps, that is, when the amplitude of the valve opening being adjusted larger or smaller is less than 6 steps, it is understood that a relatively small adjustment has been made to the refrigerant amount in the liquid storage element 2 this time, and the circulating refrigerant amount of the air conditioner changes little. It is necessary to obtain the actual liquid level and the target liquid level of the liquid storage element 2 in the next cycle after an interval of 2 minutes.

[0077] The method for regulating the refrigerant circulation amount of the heat exchanger of the air conditioner provided by the present application will be introduced in detail below.

[0078] S01, control the first solenoid valve 3 to close when the air conditioner is turned on;

[0079] S02, after the duration after the air conditioner is turned on is greater than or equal to the first preset duration, the air conditioner enters the startup stable stage, and obtain the outdoor ambient temperature and the indoor ambient temperature in the startup stable stage;

[0080] S03, determine the first target liquid level of the liquid storage element 2 according to the temperature difference between the outdoor ambient temperature and the indoor ambient temperature in the startup stable stage;

[0081] S04, obtain the first actual liquid level of the liquid storage element 2 in the startup stable stage;

[0082] S05, when the liquid level difference between the first actual liquid level and the first target liquid level is greater than or equal to the first preset liquid level difference, make a large adjustment to the first solenoid valve 3 to greatly adjust the refrigerant amount flowing out of the outlet of the third heat exchange part 13;

[0083] S06, the air conditioner enters the operation stable stage, and obtain the second actual liquid level and the second target liquid level of the liquid storage element 2 in the operation stable stage;

[0084] S07, make a fine adjustment to the first solenoid valve 3 according to the liquid level difference between the second actual liquid level and the second target liquid level to slightly adjust the refrigerant amount flowing out of the outlet of the third heat exchange part 13;

[0085] S08. Determine the interval duration for obtaining the actual liquid level and the target liquid level of the liquid storage element 2 in the next cycle according to the fine-tuning amplitude of the first solenoid valve 3. When the fine-tuning amplitude of the first solenoid valve 3 is greater than or equal to the first preset amplitude, obtain the actual liquid level and the target liquid level of the liquid storage element 2 in the next cycle after the first interval duration; when the fine-tuning amplitude of the first solenoid valve 3 is less than the first preset amplitude, obtain the actual liquid level and the target liquid level of the liquid storage element 2 in the next cycle after the second interval duration.

[0086] Embodiments of the present disclosure also provide a device for adjusting the refrigerant circulation amount of a heat exchanger of an air conditioner.

[0087] The heat exchanger of the air conditioner includes a heat exchanger body 1 and a liquid storage element 2. The heat exchanger body 1 includes a first heat exchange part 11, a second heat exchange part 12, and a third heat exchange part 13 that are connected in series and communicated in sequence. The liquid storage element 2 includes a liquid inlet pipe 21, a liquid outlet pipe 22, and a refrigerant amount adjustment pipe 23 provided at the bottom of the liquid storage element 2. The refrigerant amount adjustment pipe 23 is provided with a first solenoid valve 3. The heat exchange pipe 111 of the first heat exchange part 11 is connected to the liquid inlet pipe 21. The liquid storage element 2 is used for partially storing the refrigerant flowing out of the heat exchange pipe 111 of the first heat exchange part 11 and then flowing into the second heat exchange part 12 of the heat exchanger body 1 through the liquid outlet pipe 22. The refrigerant amount adjustment pipe 23 is connected to the refrigerant outlet of the third heat exchange part 13.

[0088] The device for adjusting the refrigerant circulation amount of a heat exchanger of an air conditioner includes a liquid level acquisition module and a refrigerant adjustment module 300. The liquid level acquisition module 200 is configured to determine the target liquid level of the liquid storage element 2 according to the temperature difference between the outdoor ambient temperature and the indoor ambient temperature. The refrigerant adjustment module 300 is configured to adjust the opening degree of the first solenoid valve 3 according to the liquid level difference between the actual liquid level and the target liquid level of the liquid storage element 2, so as to adjust the refrigerant amount flowing into the outlet of the third heat exchange part 13, as Figure 5 shown.

[0089] It can be understood that the embodiments in the foregoing method for adjusting the refrigerant circulation amount of a heat exchanger of an air conditioner can also be applied to the device for adjusting the refrigerant circulation amount of a heat exchanger of an air conditioner herein, and will not be elaborated herein.

[0090] Embodiments of the present disclosure also provide a device for adjusting the refrigerant circulation amount of a heat exchanger of an air conditioner, including a processor 100 and a memory 101 storing program instructions. The processor 100 is configured to execute the method for adjusting the refrigerant circulation amount of a heat exchanger of an air conditioner when running the program instructions, as Figure 6 shown. Embodiments of the present disclosure also provide an air conditioner including the device for adjusting the refrigerant circulation amount of a heat exchanger of an air conditioner as described above.

[0091] An embodiment of the present disclosure provides a computer program product. The computer program product includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions that, when executed by a computer, cause the computer to execute the method for adjusting the refrigerant circulation amount of the heat exchanger of the air conditioner described above.

[0092] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transient computer-readable storage medium.

[0093] The technical solution of the embodiment of the present disclosure may be embodied in the form of a software product. The computer software product is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method of the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, including: various media that can store program codes such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs, or may also be a transient storage medium.

[0094] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure, enabling those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process, and other changes. The embodiments merely represent possible variations. Unless explicitly required, the individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terms used in this application are only for describing the embodiments and do not limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to also include the plural forms. Similarly, as used in this application, the term "and / or" refers to any and all possible combinations including one or more of the associated listed items. Additionally, when used in this application, the term "comprise" and its variants "comprises" and / or "comprising" etc. mean the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groups thereof. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, or apparatus comprising the element. Herein, each embodiment may focus on the differences from other embodiments, and the same or similar parts among the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method parts disclosed in the embodiments, the relevant parts may refer to the description of the method parts.

[0095] Those skilled in the art can realize that the units and algorithm steps of each example 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 in a hardware or software manner may depend on the specific application and design constraints of the technical solution. The skilled person may use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of the embodiments of the present disclosure. The skilled person can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein.

[0096] In the embodiments disclosed herein, the disclosed methods, 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 may be only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the displayed or discussed couplings or direct couplings or communication connections between each other may be through some interfaces. The indirect couplings or communication connections of devices or units may be in electrical, mechanical, or other forms. The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to implement this embodiment. In addition, in the embodiments of the present disclosure, the various functional units may be integrated in one processing unit, or each unit may exist physically separately, or two or more units may be integrated in one unit.

[0097] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code that contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions marked in the block may occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description. Sometimes, there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. Each block in the block diagram and / or flowchart, as well as the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for adjusting the refrigerant circulation amount of a heat exchanger of an air conditioner, characterized in that, the heat exchanger includes: a heat exchanger body, including a first heat exchange part, a second heat exchange part and a third heat exchange part connected in series and communicated in sequence; and, a liquid storage element, including a liquid inlet pipe, a liquid outlet pipe and a refrigerant amount adjustment pipe arranged at the bottom of the liquid storage element, the refrigerant amount adjustment pipe is provided with a first solenoid valve, the heat exchange pipe of the first heat exchange part is communicated with the liquid inlet pipe, the liquid storage element is used for partially storing the refrigerant flowing out of the heat exchange pipe of the first heat exchange part and then flowing into the second heat exchange part of the heat exchanger body through the liquid outlet pipe, and, the refrigerant amount adjustment pipe is communicated with the refrigerant outlet of the third heat exchange part, the method for adjusting the refrigerant circulation amount of the heat exchanger of the air conditioner includes: determining the target liquid level of the liquid storage element according to the temperature difference between the outdoor ambient temperature and the indoor ambient temperature; adjusting the opening degree of the first solenoid valve according to the liquid level difference between the actual liquid level and the target liquid level of the liquid storage element, so as to adjust the refrigerant amount flowing into the outlet of the third heat exchange part.

2. The method according to claim 1, wherein The determining the target liquid level of the liquid storage element according to the temperature difference between the outdoor ambient temperature and the indoor ambient temperature includes: controlling the first solenoid valve to close when the air conditioner is turned on; after the duration after the air conditioner is turned on is greater than or equal to a first preset duration, the air conditioner enters the startup stable stage, and the outdoor ambient temperature and the indoor ambient temperature in the startup stable stage are obtained; determining the first target liquid level of the liquid storage element according to the temperature difference between the outdoor ambient temperature and the indoor ambient temperature in the startup stable stage.

3. The method according to claim 2, characterized in that, The adjusting the opening degree of the first solenoid valve according to the liquid level difference between the actual liquid level and the target liquid level of the liquid storage element, so as to adjust the refrigerant amount flowing into the outlet of the third heat exchange part, includes: obtaining the first actual liquid level of the liquid storage element in the startup stable stage, when the liquid level difference between the first actual liquid level and the first target liquid level is greater than or equal to a first preset liquid level difference, performing a large adjustment on the first solenoid valve to greatly adjust the refrigerant amount flowing into the outlet of the third heat exchange part.

4. The method according to claim 3, wherein After performing a large adjustment on the first solenoid valve, it further includes: the air conditioner enters the operation stable stage, obtaining the second actual liquid level and the second target liquid level of the liquid storage element in the operation stable stage, and performing a fine adjustment on the first solenoid valve according to the liquid level difference between the second actual liquid level and the second target liquid level to slightly adjust the refrigerant amount flowing into the outlet of the third heat exchange part.

5. The method according to claim 4, wherein After performing a fine adjustment on the first solenoid valve, it further includes: determining the interval duration for obtaining the actual liquid level and the target liquid level of the liquid storage element in the next cycle according to the fine adjustment amplitude of the first solenoid valve, when the fine adjustment amplitude of the first solenoid valve is greater than or equal to a first preset amplitude, obtaining the actual liquid level and the target liquid level of the liquid storage element in the next cycle after a first interval duration; when the fine adjustment amplitude of the first solenoid valve is less than the first preset amplitude, obtaining the actual liquid level and the target liquid level of the liquid storage element in the next cycle after a second interval duration, wherein, the first interval duration is greater than the second interval duration.

6. According to the method of claim 5, characterized in that, The first preset duration is greater than the first interval duration.

7. A device for adjusting the refrigerant circulation amount of a heat exchanger of an air conditioner, characterized in that The heat exchanger includes: A heat exchanger body, including a first heat exchange part, a second heat exchange part, and a third heat exchange part that are connected in series and communicated in sequence; and, A liquid storage element, including a liquid inlet pipe, a liquid outlet pipe, and a refrigerant amount adjustment pipe provided at the bottom of the liquid storage element. The refrigerant amount adjustment pipe is provided with a first solenoid valve. The heat exchange pipe of the first heat exchange part is communicated with the liquid inlet pipe. The liquid storage element is used for partially storing the refrigerant flowing out of the heat exchange pipe of the first heat exchange part, and then flowing into the second heat exchange part of the heat exchanger body through the liquid outlet pipe. Moreover, the refrigerant amount adjustment pipe is communicated with the refrigerant outlet of the third heat exchange part. The device for adjusting the refrigerant circulation amount of a heat exchanger of an air conditioner includes: A liquid level acquisition module, configured to determine the target liquid level of the liquid storage element according to the temperature difference between the outdoor ambient temperature and the indoor ambient temperature; A refrigerant adjustment module, configured to adjust the opening degree of the first solenoid valve according to the liquid level difference between the actual liquid level and the target liquid level of the liquid storage element, so as to adjust the refrigerant amount flowing into the outlet of the third heat exchange part.

8. A device for adjusting the refrigerant circulation volume of a heat exchanger of an air conditioner, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to execute the method for adjusting the refrigerant circulation amount of a heat exchanger of an air conditioner according to any one of claims 1 to 6 when running the program instructions.

9. An air conditioner, characterized in that, It includes the device for adjusting the refrigerant circulation amount of a heat exchanger of an air conditioner according to claim 7 or 8.

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