Method for controlling air conditioner, apparatus, air conditioner, and storage medium

Abstract

The application relates to the technical field of intelligent household appliances, and discloses a method for controlling an air conditioner, the air conditioner comprising: a throttling heat exchanger; the throttling heat exchanger comprising: a plurality of heat exchange branches; the air conditioner further comprising: a first refrigerant circulation loop and a second refrigerant circulation loop sharing the throttling heat exchanger; by switching the on-off state of the first refrigerant circulation loop and the second refrigerant circulation loop, each heat exchange branch can be switched between a parallel connection communication state and a series connection communication state; the method comprising: in the case that the air conditioner operates in a refrigeration mode, acquiring the exhaust temperature of the air conditioner; according to the exhaust temperature, determining the frequency reduction demand of the air conditioner; according to the frequency reduction demand, determining the target state of each heat exchange branch; and according to the target state, controlling the on-off state of the first refrigerant circulation loop and the second refrigerant circulation loop. In this way, the air conditioner can have sufficient capacity to release at high temperatures, thereby ensuring the performance of the air conditioner. The application further discloses a device for controlling an air conditioner, an air conditioner and a storage medium.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent household appliances, for example to a method and device for controlling an air conditioner, an air conditioner and a storage medium. BACKGROUND

[0002] Air outlet protection refers to: when the outlet temperature reaches a high temperature, the frequency of the compressor is controlled to decrease, so as to prevent the air conditioner from shutting down due to the high internal pressure of the air conditioner. However, the outlet temperature cannot reflect the real change state of the air conditioner. For example, when the internal temperature of the air conditioner reaches 80℃, but the actual outlet temperature is 70℃. In this way, the air outlet protection is delayed.

[0003] The related art discloses a pressure control method of an air conditioner, comprising: step S1, detecting the operation mode of the air conditioner; step S2, detecting the outlet pressure and return pressure of the compressor in the air conditioner; and step S3, controlling the rotation speed of the outer fan and the inner fan in the air conditioner according to the operation mode of the air conditioner and the outlet pressure and the return pressure.

[0004] In the above method, the rotation speed of the outer fan or the inner fan is adjusted, so that the operating pressure of the unit is within a suitable range, so as to achieve the purpose of no delay. However, adjusting the rotation speed of the inner and outer fans will also affect the performance of the air conditioner, for example, it will cause the air conditioner to have relatively low performance when running in high temperature in summer. SUMMARY

[0005] The following presents a simplified summary of some aspects of the disclosed embodiments in order to provide a basic understanding of such embodiments. This summary is not an extensive overview of the disclosure and is not intended to identify key / critical elements or to delineate the scope of these embodiments. Its sole purpose is to present some aspects of these embodiments in a simplified form as a prelude to the more detailed description that is presented later.

[0006] The embodiments of the present disclosure provide a method and device for controlling an air conditioner, an air conditioner and a storage medium, so as to ensure the performance of the air conditioner in high temperature in summer.

[0007] In some embodiments, the air conditioner comprises: a throttling heat exchanger; the throttling heat exchanger comprises: a plurality of heat exchange branches; the air conditioner further comprises: a first refrigerant circulation loop and a second refrigerant circulation loop sharing the throttling heat exchanger; by switching the on-off state of the first refrigerant circulation loop and the second refrigerant circulation loop, each heat exchange branch can be switched between a parallel connection state and a series connection state; the method comprises: in the case that the air conditioner runs in a cooling mode, acquiring the outlet temperature of the air conditioner; determining the frequency reduction demand of the air conditioner according to the outlet temperature; determining the target state of each heat exchange branch according to the frequency reduction demand; and controlling the on-off state of the first refrigerant circulation loop and the second refrigerant circulation loop according to the target state.

[0008] In some embodiments, the apparatus includes: a processor and a memory storing program instructions, wherein the processor is configured to execute the aforementioned method for controlling an air conditioner when running the program instructions.

[0009] In some embodiments, the air conditioner includes: a throttling heat exchanger; the throttling heat exchanger includes: multiple heat exchange branches; the air conditioner also includes: a first refrigerant circulation loop and a second refrigerant circulation loop that share the throttling heat exchanger; by switching the on and off states of the first refrigerant circulation loop and the second refrigerant circulation loop, each heat exchange branch can be switched between a parallel connection state and a series connection state; and the aforementioned device for controlling the air conditioner.

[0010] In some embodiments, the storage medium stores program instructions, and when the program instructions are run, the aforementioned method for controlling the air conditioner is executed.

[0011] The method, device, air conditioner, and storage medium for controlling an air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0012] The air conditioner's exhaust temperature is used to determine the need for frequency reduction, and the target state of each heat exchange branch is determined based on this frequency reduction requirement. By controlling the on / off states of the first and second refrigerant circulation loops, the state of each heat exchange branch meets the target state. In this way, by controlling the refrigerant diversion pattern of the throttling heat exchanger, the exhaust temperature can be lowered or maintained. High-frequency operation of the air conditioner is maintained without requiring frequency reduction or adjusting the operating states of other components. This method ensures sufficient cooling capacity at high temperatures, maximizing the air conditioner's cooling capacity and thus ensuring performance.

[0013] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0015] Figure 1 is a structural schematic diagram of a throttling heat exchanger provided in an embodiment of the present disclosure;

[0016] Figure 2 1 is a schematic diagram of refrigerant flow when the air conditioner provided by an embodiment of the present disclosure is operating in a heating condition and the throttling heat exchanger serves as an outdoor heat exchanger;

[0017] Figure 3 is a refrigerant flow schematic diagram when the throttling heat exchanger is used as an outdoor heat exchanger in a refrigeration operating mode of the air conditioner provided by the embodiments of the present disclosure;

[0018] Figure 4 is a structural schematic diagram of a first distributor provided by the embodiments of the present disclosure;

[0019] Figure 5 is a structural schematic diagram of another first distributor provided by the embodiments of the present disclosure;

[0020] Figure 6 is a refrigerant flow schematic diagram when the first refrigerant circulation loop of the air conditioner is connected provided by the embodiments of the present disclosure;

[0021] Figure 7 is a refrigerant flow schematic diagram when the second refrigerant circulation loop of the air conditioner is connected provided by the embodiments of the present disclosure;

[0022] Figure 8 is a schematic diagram of one method for controlling the air conditioner provided by the embodiments of the present disclosure;

[0023] Figure 9 is a schematic diagram of another method for controlling the air conditioner provided by the embodiments of the present disclosure;

[0024] Figure 10 is a schematic diagram of another method for controlling the air conditioner provided by the embodiments of the present disclosure;

[0025] Figure 11 is an application schematic diagram provided by the embodiments of the present disclosure;

[0026] Figure 12 is a schematic diagram of one device for controlling the air conditioner provided by the embodiments of the present disclosure;

[0027] Figure 13 is a schematic diagram of another device for controlling the air conditioner provided by the embodiments of the present disclosure.

[0028] Reference signs:

[0029] 1, compressor; 2, outdoor heat exchanger; 3, indoor heat exchanger; 4, first pipeline; 5, second pipeline; 6, third pipeline; 7, fourth pipeline; 8, fifth pipeline; 9, first on-off valve; 10, second on-off valve; 11, third on-off valve; 12, fourth on-off valve;

[0030] 200, throttle heat exchanger; 210, heat exchange pipeline; 211, first heat exchange branch; 212, second heat exchange branch; 213, third heat exchange branch; 221, first distributor; 222, second distributor; 223, third distributor; 224, fourth distributor; 2211, first distribution branch pipe; 2212, second distribution branch pipe; 2213, collecting pipe; 2214, collecting cavity; 2215, first branch cavity; 2216, second branch cavity; 2217, first pipe section; 2218, second pipe section; 231, first throttling element; 232, second throttling element; 240, bypass pipeline; 241, electromagnetic valve. DETAILED DESCRIPTION

[0031] In order to enable a more detailed understanding of the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure is described in detail below, and the attached drawings are used for reference only and do not limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, a plurality of 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 can be simplified to facilitate the drawings.

[0032] The terms "first", "second", and the like in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0033] Unless otherwise specified, the term "a plurality of" means two or more.

[0034] In the embodiments of the present disclosure, the character " / " represents an "or" relationship between the objects before and after it. For example, A / B represents: A or B.

[0035] The term "and / or" is a description of the association relationship between objects, which means that there can be three relationships. For example, A and / or B means: A or B, or, A and B, the three relationships.

[0036] The term "corresponding" can refer to an association relationship or a binding relationship. A and B correspond to each other means that A and B have an association relationship or a binding relationship.

[0037] The air conditioner comprises an indoor unit and an outdoor unit. The indoor unit is provided with an indoor heat exchanger, an indoor fan and the like, which can be used to realize functions such as heat exchange with the indoor environment in cooperation with refrigerant. The outdoor unit is provided with an outdoor heat exchanger, an outdoor fan, a compressor, a gas-liquid separator and the like, which can be used to realize functions such as heat exchange with the outdoor environment in cooperation with refrigerant, refrigerant compression, refrigerant throttling and the like.

[0038] The indoor heat exchanger, the outdoor heat exchanger, the compressor and the gas-liquid separator and the like are connected through a refrigerant pipeline to jointly constitute a refrigerant circulation system for circulating and conveying refrigerant between the indoor and outdoor units. The optimal flow path required by the outdoor heat exchanger is different when the air conditioner is running in a cooling mode and a heating mode. The throttling heat exchanger of the embodiments of the present disclosure realizes that, when the air conditioner is running in a cooling mode, the heat exchange branch of the throttling heat exchanger is less, and at the same time, when the air conditioner is running in a heating mode, the heat exchange branch of the throttling heat exchanger is more, and the throttling heat exchanger realizes variable flow distribution of the refrigerant flow path, which can simultaneously make the air conditioner have the optimal flow path in the cooling mode and the heating mode. Figure 2 and Figure 3 as shown.

[0039] In combination with Figure 1 as shown, the embodiments of the present disclosure simultaneously provide a throttling heat exchanger. The throttling heat exchanger 200 comprises a heat exchange pipeline 210, a first liquid distributor 221 and a throttling element. The heat exchange pipeline 210 comprises a plurality of heat exchange branches connected in parallel and communicated, the first liquid distributor 221 comprises a main pipe and a plurality of liquid distribution branch pipes, the plurality of liquid distribution branch pipes are communicated with the plurality of heat exchange branches, and the throttling element is arranged between the heat exchange branch and the first liquid distributor 221 to throttle the refrigerant after being distributed by the first liquid distributor 221 and before entering the heat exchange branch.

[0040] It can be understood that, in combination with Figure 2 and Figure 3 as shown, when the flow direction of the refrigerant in the throttling heat exchanger 200 is different, the connection form of each heat exchange branch is also different, which specifically shows that the plurality of heat exchange branches are connected in parallel and communicated, or the heat exchange branches are reduced. In this way, the variable flow distribution of the throttling heat exchanger 200 is realized.

[0041] As shown in Figure 1 , the throttling element in the throttling heat exchanger 200 provided by the embodiments of the present disclosure is arranged between the heat exchange branch and the first liquid distributor 221, which can throttle the refrigerant after being distributed by the first liquid distributor 221 and before entering the heat exchange branch. That is, the refrigerant flowing into the outdoor heat exchanger 2 is not throttled by pressure reduction before being distributed by the first liquid distributor 221. At this time, the liquid content of the refrigerant entering the first liquid distributor 221 is more, which improves the liquid distribution uniformity of the first liquid distributor 221, and further improves the heat exchange uniformity of the throttling heat exchanger 200.

[0042] Optionally, the first distributor 221 comprises a first distribution branch 2211 and a second distribution branch 2212. The first distribution branch 2211 is connected to one or more heat exchange branches, and the second distribution branch 2212 is connected to one or more heat exchange branches. The first distribution branch 2211 is provided with a first throttling element 231, and the second distribution branch 2212 is provided with a second throttling element 232.

[0043] A throttling element is arranged at each distribution branch of the first distributor 221 to throttle the refrigerant flowing through the different distribution branches, respectively. As shown in Figure 1 .

[0044] Optionally, the heat exchange pipeline 210 comprises an upper heat exchange pipeline and a lower heat exchange pipeline. The upper heat exchange pipeline comprises the first heat exchange branch 211 and the second heat exchange branch 212 connected in series, and the lower heat exchange pipeline comprises the third heat exchange branch 213. The refrigerant outlet of the first heat exchange branch 211 and the second heat exchange branch 212 is connected to the second distributor 222, the refrigerant inlet of the second heat exchange branch 212 and the third heat exchange branch 213 is connected to the third distributor 223, and the refrigerant inlet of the first heat exchange branch 211 is connected to the fourth distributor 224. The first throttling element 231 is arranged between the first distribution branch 2211 and the second distributor 222, and the second throttling element 232 is arranged between the second distribution branch 2212 and the third heat exchange branch 213. Optionally, the throttling heat exchanger 200 further comprises a bypass pipeline 240. The bypass pipeline 240 connects the third distributor 223 and the fourth distributor 224, and the bypass pipeline 240 is provided with an electromagnetic valve 241.

[0045] When the air conditioner operates in a heating condition and the throttling heat exchanger 200 serves as an outdoor heat exchanger, the refrigerant flow path in the throttling heat exchanger 200 is as shown in Figure 2 . The electromagnetic valve 241 between the fourth distributor 224 and the third distributor 223 is controlled to be conductive, and the electronic expansion valve between the second distributor 222 and the first distribution branch 2211 is controlled to be conductive. Specifically, the low-temperature and low-pressure refrigerant enters the first distributor 221 through the main pipeline of the throttling heat exchanger 200, and is distributed into the first throttling element 231 and the second throttling element 232. The refrigerant after the first throttling element 231 enters the first heat exchange branch 211 and the second heat exchange branch 212 through the second distributor 222 for heat exchange, and the refrigerant after the second throttling element 232 enters the third heat exchange branch 213 for heat exchange. The refrigerant after the second heat exchange branch 212 and the third heat exchange branch 213 is converged through the third distributor 223 and further flows out through the fourth distributor 224; the refrigerant after the first heat exchange branch 211 is converged through the fourth distributor 224. That is, the first heat exchange branch 211, the second heat exchange branch 212 and the third heat exchange branch 213 are in a series connection state in the heating condition.

[0046] When the air conditioner is in cooling operation and the throttling heat exchanger 200 is used as an outdoor heat exchanger, the refrigerant flow path in the throttling heat exchanger 200 is as follows: Figure 3 As shown. The solenoid valve 241 between the fourth liquid distributor 224 and the third liquid distributor 223 is controlled to be closed. At the same time, the electronic expansion valve between the second liquid distributor 222 and the first liquid distribution branch 2211 is controlled to be closed. Specifically, after the high-temperature and high-pressure refrigerant enters the fourth liquid distributor 224 through the other main pipe of the throttling heat exchanger 200, it flows into the first heat exchange branch 211, then flows into the second heat exchange branch 212 through the second liquid distributor 222, and then flows into the third heat exchange branch 213 through the third liquid distributor 223. The refrigerant flowing out of the third heat exchange branch 213 is throttled and reduced in pressure by the second throttling element 232 before flowing out through the first liquid distributor 221. That is, the first heat exchange branch 211, the second heat exchange branch 212, and the third heat exchange branch 213 are connected in series under the cooling condition.

[0047] Optionally, the first throttling element 231 is an electronic expansion valve. In this way, the flow path of the refrigerant in the throttling heat exchanger 200 can be changed by controlling the opening or closing of the electronic expansion valve.

[0048] In order to achieve variable flow diversion of the outdoor heat exchanger, a one-way valve may be provided at the position of the electronic expansion valve. Optionally, the second throttling element 232 is a capillary tube.

[0049] Optionally, the first liquid separator includes a shell and a manifold 2213. The shell has a liquid separation cavity inside, and the shell is provided with a first liquid separation port and a second liquid separation port. The manifold 2213 includes a first pipe section 2217 and a second pipe section 2218 that are connected by bending, and the first pipe section 2217 is directly connected to the liquid separation cavity. The first liquid separation branch 2211 is connected to the liquid separation cavity through the first liquid separation port, and the second liquid separation branch 2212 is connected to the liquid separation cavity through the second liquid separation port, wherein the plane where the axes of the first pipe section 2217 and the second pipe section 2218 are located is the first plane, and the plane where the axes of the first liquid separation branch 2211 and the second liquid separation branch 2212 are located is the second plane, and the first plane is not perpendicular to the second plane. Figure 4 and Figure 5 shown.

[0050] Optionally, the liquid separation chamber includes a confluence chamber 2214, a first branch chamber 2215 and a second branch chamber 2216, the first liquid separation branch pipe 2211 is connected to the first branch chamber 2215 through the first liquid separation port, and the second liquid separation branch pipe 2212 is connected to the second branch chamber 2216 through the second liquid separation port.

[0051] The conduit 2213 includes a first pipe section 2217 and a second pipe section 2218. The plane where the axes of the first pipe section 2217 and the second pipe section 2218 lie is a first plane, and the angle between the first plane and the second plane is e.Figure 5 The first plane and the second plane are non-perpendicular, which means that the included angle e between the first plane and the second plane is less than 90°. Alternatively, the included angle between the first plane and the second plane is measured as an acute angle. The first plane and the second plane are non-perpendicular, so that the amount of refrigerant entering the first distribution branch pipe 2211 and the second distribution branch pipe 2212 through the first pipe section 2217 of the collecting pipe 2213 is different. For example, when the included angle between the first plane and the second plane is on the side of the first distribution branch pipe 2211, under the action of gravity, the flow rate of the refrigerant flowing to the second distribution branch pipe 2212 is greater than the flow rate of the refrigerant flowing to the first distribution branch pipe 2211. Similarly, when the included angle between the first plane and the second plane is on the side of the second distribution branch pipe 2212, under the action of gravity, the flow rate of the refrigerant flowing to the first distribution branch pipe 2211 is greater than the flow rate of the refrigerant flowing to the second distribution branch pipe 2212.

[0052] As shown in the throttling heat exchanger, Figure 2 After the refrigerant is distributed by the first distributor 221, it flows into three parallel heat exchange branches. Among them, as shown in the direction of Figure 2 , the refrigerant flows into only the third heat exchange branch 213 after passing through the distribution branch pipe on the left side of the first distributor 221, and the refrigerant flows into two heat exchange branches after passing through the distribution branch pipe on the right side of the first distributor 221. It can be seen that the amount of refrigerant required by the two distribution branch pipes of the first distributor 221 is different after the refrigerant passes through the first distributor 221. As shown in the throttling heat exchanger, Figure 2 , the amount of refrigerant required by the distribution branch pipe on the right side is about twice the amount of refrigerant required by the distribution branch pipe on the left side. The distributor provided by the embodiment of the present disclosure uses the gravitational action of the refrigerant during flow, and through the setting of the included angle between the first plane where the axes of the first pipe section 2217 and the second pipe section 2218 of the collecting pipe 2213 are located and the second plane where the axes of the first distribution branch pipe 2211 and the second distribution branch pipe 2212 are located, the amount of refrigerant flowing out of the different distribution branch pipes of the distributor is realized to be different, the requirement of different amounts of refrigerant required by the distribution branch pipes is met, and the heat exchange efficiency of the throttling heat exchanger is improved.

[0053] Alternatively, the included angle between the first plane and the second plane is less than 90 degrees, so that the refrigerant realizes deflection under the action of gravity after flowing through the first pipe section 2217 of the collecting pipe 2213, and then the amount of refrigerant flowing into the first distribution branch pipe 2211 and the second distribution branch pipe 2212 is different.

[0054] Alternatively, the inner diameter of the first pipe section 2217 of the collecting pipe 2213 is greater than the inner diameter of the first distribution branch pipe 2211.

[0055] Optionally, the inner diameter of the first distribution branch pipe 2211 is greater than the inner diameter of the second distribution branch pipe 2212. Optionally, the first pipe section 2217 of the manifold pipe 2213 is arranged to be inclined to the side of the second distribution branch pipe 2212, and under the action of gravity, further in combination with the inner diameter of the first distribution branch pipe 2211 being greater than the inner diameter of the second distribution branch pipe 2212, more refrigerant flows into the first distribution branch pipe 2211, further increasing the refrigerant flow difference between the two distribution branch pipes.

[0056] By arranging an included angle between the first plane in which the axes of the first pipe section 2217 and the second pipe section 2218 of the manifold pipe 2213 are located and the second plane in which the axes of the two distribution branch pipes are located, and further in combination with the inner diameter difference between the two distribution branch pipes, within the allowable range of the heat exchange pipe diameter of the heat exchanger, the refrigerant flow ratio of the two distribution branch pipes can be 2:1-7:1, or even larger refrigerant distribution requirements. The inner diameter of the second distribution branch pipe 2212 does not need to be designed too small, and the refrigerant flow in the first distribution branch pipe 2211 can be much greater than the refrigerant flow in the second distribution branch pipe 2212. Therefore, the refrigerant distribution scheme of the distributor provided by the embodiment of the present disclosure avoids the problem of excessive total pressure drop of the distribution branch pipe of the distributor and the heat exchanger when the refrigerant distribution of the two distribution branch pipes is relatively large.

[0057] Optionally, the included angle between the first plane in which the axes of the first pipe section 2217 and the second pipe section 2218 of the manifold pipe 2213 are located and the second plane in which the axes of the two distribution branch pipes are located is greater than or equal to 50 degrees and less than or equal to 70 degrees. The difference between the refrigerant flows in the first distribution branch pipe 2211 and the second distribution branch pipe 2212 is increased.

[0058] Optionally, the second pipe section 2218 of the manifold pipe 2213 is arranged to be inclined to the side of the second distribution branch pipe 2212.

[0059] In combination Figure 6 and Figure 7 As shown in FIGS. 1-3, the embodiment of the present disclosure provides an air conditioner. The air conditioner comprises a first refrigerant circulation loop and a second refrigerant circulation loop.

[0060] The compressor 1 is connected in communication with the fourth distributor 224 of the throttling heat exchanger 200 through a first pipe 4. The first distributor 221 is connected in communication with the indoor heat exchanger 3 through a second pipe 5. The indoor heat exchanger 3 is connected in communication with the compressor 1 through a third pipe 6. In this way, the compressor 1, the first pipe 4, the throttling heat exchanger 200, the second pipe 5, the indoor heat exchanger 3, and the third pipe 6 form the first refrigerant circulation loop.

[0061] The fourth pipeline 7 has a first end connected to the first position on the first pipeline 4 and a second end connected to the second position on the second pipeline 5. The fifth pipeline 8 has a first end connected to the third position on the first pipeline 4 and a second end connected to the fourth position on the second pipeline 5. In this way, the compressor 1, the fourth pipeline 7, the throttling heat exchanger 200, the fifth pipeline 8, the indoor heat exchanger 3, and the third pipeline 6 form a second refrigerant circulation loop.

[0062] The first pipeline 4 is provided with a first on-off valve 9, and the first on-off valve 9 is located between the first position and the third position. The second pipeline 5 is provided with a second on-off valve 10, and the second on-off valve 10 is located between the second position and the fourth position. The fourth pipeline 7 is provided with a third on-off valve 11. The fifth pipeline 8 is provided with a fourth on-off valve 12. By switching the on-off state of the first refrigerant circulation loop and the second refrigerant circulation loop, the heat exchange branches can be switched between the parallel connection state and the series connection state.

[0063] In combination Figure 6 As shown, the first on-off valve 9 and the second on-off valve 10 are controlled to be open, and the electromagnetic valve 241 and the electronic expansion valve 231 are controlled to be closed to make the first refrigerant circulation loop connected, and at the same time, the third on-off valve 11 and the fourth on-off valve 12 are controlled to be closed to make the second refrigerant circulation loop disconnected. In this way, the heat exchange branches can be in the series connection state.

[0064] In combination Figure 7 As shown, the first on-off valve 9 and the second on-off valve 10 are controlled to be closed to make the first refrigerant circulation loop disconnected, and at the same time, the third on-off valve 11 and the fourth on-off valve 12 are controlled to be open, and the electromagnetic valve 241 and the electronic expansion valve 231 are controlled to be connected to make the second refrigerant circulation loop connected. In this way, the heat exchange branches can be in the parallel connection state.

[0065] The air conditioner described above can be a single-cooling air conditioner or a cooling and heating air conditioner. When it is a cooling and heating air conditioner, the air conditioner further includes a four-way valve.

[0066] In combination Figure 8 As shown, the present disclosure provides a method for controlling an air conditioner, comprising:

[0067] S801, the processor acquires the exhaust temperature of the air conditioner in the case that the air conditioner operates in the cooling mode.

[0068] S802, the processor determines the demand for frequency reduction of the air conditioner according to the exhaust temperature.

[0069] S803, the processor determines the target state of each heat exchange branch according to the demand for frequency reduction.

[0070] S804, the processor controls the on-off state of the first refrigerant circulation loop and the second refrigerant circulation loop according to the target state.

[0071] The air conditioner starts and runs in the cooling mode in response to the cooling instruction. An exhaust port of the air conditioner is provided with a temperature sensor to obtain an exhaust temperature of the air conditioner. The temperature sensor is in communication connection with a processor of the air conditioner to transmit the obtained exhaust temperature to the processor in real time. The processor determines whether the air conditioner has a frequency reduction demand according to the exhaust temperature. Generally, the higher the exhaust temperature, the greater the pressure inside the air conditioner, and the greater the probability that the air conditioner has a frequency reduction demand. According to the frequency reduction demand, the target state of each heat exchange branch is determined, i.e., the parallel connection communication state or the series connection communication state. So that the target state of each heat exchange branch matches the frequency reduction demand of the air conditioner. According to the target state, the on-off state of the first refrigerant circulation loop and the second refrigerant circulation loop is controlled, so that the state of each heat exchange branch meets the target state.

[0072] In the embodiments of the present disclosure, the frequency reduction demand of the air conditioner is determined by the exhaust temperature of the air conditioner, and the target state of each heat exchange branch is determined according to the frequency reduction demand. The state of each heat exchange branch meets the target state by controlling the on-off state of the first refrigerant circulation loop and the second refrigerant circulation loop. In this way, the exhaust temperature is reduced or kept unchanged by controlling the shunt form of the throttling heat exchanger to the refrigerant. The high-frequency operation of the air conditioner can be ensured without making the air conditioner run at a reduced frequency or adjusting the operating state of other components. Compared with controlling the air conditioner to run at a reduced frequency or adjusting the operating state of other components, the air conditioner can release enough capacity at high temperature by this way. That is, the cooling capacity of the air conditioner is maximized as much as possible, thereby ensuring the performance of the air conditioner.

[0073] Optionally, in step S802, the processor determines the frequency reduction demand of the air conditioner according to the exhaust temperature, including:

[0074] The processor determines that the air conditioner does not have a frequency reduction demand when the exhaust temperature is less than the temperature threshold.

[0075] The processor determines that the air conditioner has a frequency reduction demand when the exhaust temperature is greater than or equal to the temperature threshold.

[0076] The temperature threshold T n is set to determine whether the exhaust temperature T 排 is too high. Optionally, the temperature threshold can be 90℃. If T n <T 排 , it means that the exhaust temperature is not high, and the air conditioner can continue to run at the current frequency. At this time, it is determined that the air conditioner does not have a frequency reduction demand. If T n ≥ T 排 , it means that the exhaust temperature is high. If the air conditioner continues to run at the current frequency, the exhaust temperature will be higher, and there is even a risk of shutdown of the air conditioner. At this time, it is determined that the air conditioner has a frequency reduction demand. In this way, whether the air conditioner needs to reduce the frequency is reflected by comparing the exhaust temperature with the temperature threshold.

[0077] Optionally, in step S803, the processor determines the target state of each heat exchange branch according to the frequency reduction demand, including:

[0078] The processor determines the target state as the series connection state when the air conditioner does not have the frequency reduction demand.

[0079] The processor determines the target state as the parallel connection state when the air conditioner has the frequency reduction demand.

[0080] From the foregoing, when the air conditioner operates in the refrigeration mode, each heat exchange branch is in the series connection state to achieve the "supercooling" of the refrigerant. If the air conditioner does not have the frequency reduction demand, the refrigeration capacity of the air conditioner is mainly ensured at this time. Therefore, the target state is determined as the series connection state to continue the "supercooling" of the refrigerant.

[0081] If the air conditioner has the frequency reduction demand, the refrigeration capacity of the air conditioner is secondary, the reduction of the exhaust temperature is primary, and the air conditioner is prevented from stopping due to the excessively high exhaust temperature. At this time, the target state of each heat exchange branch is determined as the parallel connection state. When each heat exchange branch is in parallel connection, the refrigerant flows in the form of "multi-branch distribution", thereby avoiding the problem of excessively high pressure caused by the flow in one pipeline. In this way, the pressure inside the air conditioner system is reduced. The pressure inside the air conditioner system is reduced in the form of refrigerant distribution, so the air conditioner does not need to operate in the frequency reduction mode, thereby ensuring the performance of the air conditioner.

[0082] Optionally, in step S804, the processor controls the on-off state of the first refrigerant circulation loop and the second refrigerant circulation loop according to the target state, including:

[0083] The processor controls the first refrigerant circulation loop and the second refrigerant circulation loop to maintain the current on-off state when the target state is the series connection state.

[0084] The processor controls the first refrigerant circulation loop and the second refrigerant circulation loop to switch the on-off state when the target state is the parallel connection state.

[0085] If the air conditioner does not need to reduce the frequency, the target state is the series connection state, and the first refrigerant circulation loop and the second refrigerant circulation loop are controlled to maintain the current on-off state. From the foregoing, when the air conditioner operates in the refrigeration mode, each heat exchange branch is in the series connection state. Therefore, at this time, the first on-off valve and the second on-off valve are controlled to remain open, and the electromagnetic valve and the electronic expansion valve are controlled to remain closed, so that the first refrigerant circulation loop remains connected. At the same time, the third on-off valve and the fourth on-off valve are controlled to remain closed, so that the second refrigerant circulation loop remains disconnected. In this way, the first refrigerant circulation loop and the second refrigerant circulation loop maintain the current on-off state.

[0086] If the air conditioner needs to reduce the frequency, and the target state is the parallel-serial-communication state, the processor controls the first refrigerant circulation loop and the second refrigerant circulation loop to switch the on-off state. Specifically, the processor controls the first on-off valve and the second on-off valve to be closed to control the first refrigerant circulation loop to be disconnected, and controls the third on-off valve and the fourth on-off valve to be opened, the solenoid valve and the electronic expansion valve to be turned on to control the second refrigerant circulation loop to be connected. In this way, the switching of the on-off state of the first refrigerant circulation loop and the second refrigerant circulation loop can be realized.

[0087] Optionally, in combination with Figure 9 As shown in the drawings, the embodiment of the present disclosure provides another method for controlling an air conditioner, comprising:

[0088] S801, the processor acquires the exhaust temperature of the air conditioner when the air conditioner is running in the refrigeration mode.

[0089] S802, the processor determines the frequency reduction demand of the air conditioner according to the exhaust temperature.

[0090] S803, the processor determines the target state of each heat exchange branch according to the frequency reduction demand.

[0091] S814, the processor controls the first refrigerant circulation loop and the second refrigerant circulation loop to keep the current on-off state when the target state is the serial-parallel-communication state.

[0092] S824, the processor controls the first refrigerant circulation loop and the second refrigerant circulation loop to switch the on-off state when the target state is the parallel-serial-communication state.

[0093] S805, the processor acquires the real-time exhaust temperature of the air conditioner after performing S824.

[0094] S806, the processor controls the running frequency of the air conditioner according to the real-time exhaust temperature.

[0095] When the on-off state of the first refrigerant circulation loop and the second refrigerant circulation loop is switched, the real-time exhaust temperature of the air conditioner is acquired by the temperature sensor. By the real-time exhaust temperature, it is judged whether the pressure inside the system can be effectively reduced by switching the on-off state of the two refrigerant circulation loops. The pressure inside the system is manifested by the real-time exhaust temperature. Therefore, the running frequency of the air conditioner is controlled according to the real-time exhaust temperature, so as to effectively reduce the pressure of the air conditioner system.

[0096] Optionally, S806, the processor controls the running frequency of the air conditioner according to the real-time exhaust temperature, comprising:

[0097] The processor controls the air conditioner to keep the current frequency running when the real-time exhaust temperature is less than the temperature threshold.

[0098] The processor controls the air conditioner to operate at a reduced frequency when the real-time exhaust temperature is greater than or equal to the temperature threshold.

[0099] The real-time exhaust temperature T 实 is compared with the temperature threshold T n . 实 If T n < T n , it indicates that the exhaust temperature is not high at this time. It also indicates that the pressure inside the system can be effectively reduced by controlling each heat exchange branch to switch to the parallel connection communication state. At this time, the air conditioner does not need to be controlled to reduce the frequency, and the air conditioner can be controlled to operate at the current frequency. Thus, the performance of the air conditioner is ensured.

[0100] If T n ≥ T 排 , it indicates that the exhaust temperature is high at this time, that is, the pressure inside the system cannot be effectively reduced by controlling each heat exchange branch to switch to the parallel connection communication state. Therefore, the pressure needs to be further reduced by reducing the operating frequency of the air conditioner.

[0101] In this way, after switching the communication state of the two refrigerant circulation loops, it is determined whether it is necessary to reduce the operating frequency of the air conditioner according to the real-time exhaust temperature. Thus, the pressure inside the air conditioner system is effectively reduced, and the system is prevented from being directly shut down due to overload.

[0102] Optionally, the processor performs timing after switching the communication state. After a first preset time period, for example, 5 minutes, the exhaust temperature is compared with the temperature threshold again. In this way, sufficient time is reserved for the exhaust temperature to change. After the exhaust temperature is stable, it is compared with the temperature threshold again. Thus, the accuracy of the comparison result is ensured.

[0103] Optionally, the processor controls the air conditioner to operate at a reduced frequency, including:

[0104] The processor determines a target frequency reduction rate corresponding to the real-time exhaust temperature according to the correlation between the exhaust temperature and the frequency reduction rate.

[0105] The processor controls the air conditioner to operate at the target frequency reduction rate.

[0106] The processor has pre-stored a correlation between the exhaust temperature and the frequency reduction rate. The correlation includes one or more corresponding relationships between the exhaust temperature and the frequency reduction rate. According to the corresponding relationship between the two, a target frequency reduction rate corresponding to the obtained real-time exhaust temperature can be determined. Then, the air conditioner is controlled to operate at the target frequency reduction rate.

[0107] Optionally, the real-time exhaust temperature T 实The higher the exhaust temperature is, the higher the frequency reduction rate is. This is because: the higher the exhaust temperature is, the greater the damage to the pipeline and the internal air conditioner is, and the faster the frequency reduction is needed. Otherwise, it will cause the current or system to overheat due to exceeding the rated limit, resulting in the air conditioner directly shutting down.

[0108] Specifically, when the exhaust temperature is located in a first temperature interval (T n , T1], the frequency reduction rate is a first rate V1. When the exhaust temperature is located in a second temperature interval (T1, T2], the frequency reduction rate is a second rate V2. When the exhaust temperature is located in a third temperature interval (T2, +∞), the frequency reduction rate is a third rate V3. Wherein, the second temperature interval is greater than the first temperature interval and less than the third temperature interval. The second rate is greater than the first rate and less than the third rate. The correlation between the exhaust temperature and the frequency reduction rate can be referred to Table 1.

[0109] Table 1 Correlation between exhaust temperature and frequency reduction rate

[0110] Exhaust temperature (°C) Downshift rate (Hz / s) (90,92] 2 (92,93] 5 (93,+∞) 7

[0111] For example, if the real-time exhaust temperature is 91℃, the air conditioner is controlled to operate at a frequency reduction rate of 2Hz / s. If the exhaust temperature is 93℃, the air conditioner is controlled to operate at a frequency reduction rate of 5Hz / s. It should be noted that the correlation in Table 1 can be adjusted according to actual needs.

[0112] In this way, the exhaust temperature is divided to form a plurality of temperature intervals. Each temperature interval corresponds to a different frequency reduction rate, so that the target frequency reduction rate is adapted to the exhaust temperature, to avoid that the frequency reduction is too fast to cause a great impact on the performance of the air conditioner.

[0113] Optionally, in combination with Figure 10 It is shown that the embodiment of the present disclosure provides another method for controlling an air conditioner, comprising:

[0114] S801, the processor acquires the exhaust temperature of the air conditioner in the case that the air conditioner operates in a cooling mode.

[0115] S802, the processor determines the frequency reduction demand of the air conditioner according to the exhaust temperature.

[0116] S803, the processor determines the target state of each heat exchange branch according to the frequency reduction demand.

[0117] S814, the processor controls the first refrigerant circulation loop and the second refrigerant circulation loop to maintain the current on-off state in the case that the target state is the series connection communication state.

[0118] S824, the processor controls the first refrigerant circulation loop and the second refrigerant circulation loop to switch the on-off state in the case that the target state is the parallel connection communication state.

[0119] S805, after the processor executes S824, the real-time exhaust temperature of the air conditioner is obtained.

[0120] S816, the processor controls the air conditioner to keep running at the current frequency in the case that the real-time exhaust temperature is less than the temperature threshold.

[0121] S826, the processor controls the air conditioner to run at a reduced frequency in the case that the real-time exhaust temperature is greater than or equal to the temperature threshold.

[0122] S807, after the processor executes S826, the air conditioner is controlled to run at the current frequency in the case that the current exhaust temperature is less than the temperature threshold.

[0123] S808, the processor controls the air conditioner to run at a preset frequency increasing rate in the case that the outdoor ambient temperature is less than a preset temperature.

[0124] S809, the processor controls the on-off state of the first and second refrigerant circulation loops according to the exhaust temperature in the case that the running frequency is increased to the initial frequency and the exhaust temperature is less than the temperature threshold.

[0125] When the air conditioner runs at a reduced frequency, the real-time exhaust temperature is obtained. If the current exhaust temperature T 当前 is less than the temperature threshold T n , it indicates that the pressure in the system is effectively reduced. At this time, in order to ensure the performance of the air conditioner, the air conditioner is controlled to stop reducing the frequency and keep running at the current frequency. So as to avoid the performance of the air conditioner to be reduced to a lower level.

[0126] The outdoor ambient temperature T 外 is obtained in real time. If the outdoor ambient temperature T 外 is less than a preset temperature T m , it indicates that the outdoor environment is not harsh. At this time, compared with the case of high outdoor temperature, the performance of the air conditioner is better. At this time, the air conditioner is controlled to run at a fourth rate. Optionally, the fourth rate is less than the first rate, for example, 1 Hz / s. In this way, the air conditioner is controlled to increase the frequency at a smaller rate, so as to avoid the exhaust temperature to be increased at a too fast rate. If the exhaust temperature is less than the temperature threshold, the frequency can be increased all the time. Until the frequency is increased to the initial frequency, the air conditioner is controlled to stop increasing the frequency and run at the initial frequency. The initial frequency is the running frequency before the air conditioner is controlled to run at a reduced frequency. If the exhaust temperature is greater than or equal to the temperature threshold during the process of increasing the frequency of the air conditioner, the air conditioner is controlled to run at a reduced frequency according to the foregoing frequency reducing logic.

[0127] If the air conditioner is increased to the initial frequency and the exhaust temperature at this time is still less than the temperature threshold, the temperature difference ΔT=T n -T cSet a temperature difference threshold, ΔT'. If ΔT > ΔT', the exhaust temperature differs significantly from the threshold. At this point, the first and second refrigerant circulation loops are controlled to switch to their initial states. That is, the first refrigerant circulation loop is connected, while the second refrigerant circulation loop is disconnected. This connects the heat exchange branches in series, achieving "supercooling" of the refrigerant and improving the air conditioner's cooling capacity.

[0128] If ΔT ≤ ΔT', the exhaust temperature is close to the threshold. Switching the first and second refrigerant circuits to their initial states may cause the exhaust temperature to become too high, necessitating frequency reduction. Therefore, the first and second refrigerant circuits are controlled to maintain their current on / off states. Specifically, the first refrigerant circuit remains disconnected, while the second refrigerant circuit remains connected.

[0129] In practical applications, such as Figure 11 As shown:

[0130] S1101, the air conditioner operates in cooling mode.

[0131] S1102, the processor obtains the exhaust temperature T of the air conditioner 排 .

[0132] S1103, the processor determines whether T 排 <T n ; If yes, execute S1104; if no, execute S1105.

[0133] S1104: The processor controls the first refrigerant circulation loop to remain connected, and controls the second refrigerant circulation loop to remain disconnected.

[0134] S1105: The processor controls the air conditioner to maintain the current frequency operation, disconnects the first refrigerant circulation loop, and controls the second refrigerant circulation loop to be connected.

[0135] S1106, the processor determines whether T 实 <T n ; If yes, execute S1107; if no, execute S1108.

[0136] S1107: The processor controls the air conditioner to maintain the current frequency.

[0137] S1108, the processor determines T 实 Temperature range; if T 实 ∈(T n , T1], then execute S1109; if T 实 ∈(T1,T2], then execute S1110; if T 实 ∈(T2,+∞), then execute S1111.

[0138] S1109, the processor controls the air conditioner to run at a rate V1; then S1112 is executed.

[0139] S1110, the processor controls the air conditioner to run at a rate V2; then S1112 is executed.

[0140] S1111, the processor controls the air conditioner to run at a rate V3; then S1112 is executed.

[0141] S1112, the processor determines whether T 当前 < T n is met; if yes, S1113 is executed; if no, S1108 is executed.

[0142] S1113, the processor controls the air conditioner to run at the current frequency.

[0143] S1114, the processor acquires the outdoor environment temperature T 外 .

[0144] S1115, the processor determines whether T 外 < T m is met; if yes, S1116 is executed; if no, S1114 is executed.

[0145] S1116, the processor controls the air conditioner to run at a fourth rate.

[0146] S1117, the processor determines whether the air conditioner is raised to the initial frequency and T c < T n is met; if yes, S1118 is executed; if the air conditioner is not raised to the initial frequency and T c < T n is met, S1116 is executed; if the air conditioner is not raised to the initial frequency and T c < T n is met, S1108 is executed.

[0147] S1118, the processor controls the air conditioner to run at the initial frequency, and calculates ΔT = T n - T c .

[0148] S1119, the processor determines whether ΔT > T'; if yes, S1120 is executed; if no, S1118 is executed.

[0149] S1120, the processor controls the first refrigerant circulation loop to be connected, and controls the second refrigerant circulation loop to be disconnected; then S1102 is executed.

[0150] In combination with Figure 12As shown, the embodiment of the present disclosure provides a device for controlling an air conditioner, comprising: an acquisition module 121, a first determination module 122, a second determination module 123 and a control module 124. The acquisition module 121 is configured to acquire the exhaust temperature of the air conditioner when the air conditioner is running in a cooling mode. The first determination module 122 is configured to determine the frequency reduction demand of the air conditioner according to the exhaust temperature. The second determination module 123 is configured to determine the target state of each heat exchange branch according to the frequency reduction demand. The control module 124 is configured to control the on-off state of the first refrigerant circulation loop and the second refrigerant circulation loop according to the target state.

[0151] By using the device for controlling an air conditioner provided by the embodiment of the present disclosure, the frequency reduction demand of the air conditioner is determined by the exhaust temperature of the air conditioner, and the target state of each heat exchange branch is determined according to the frequency reduction demand. By controlling the on-off state of the first refrigerant circulation loop and the second refrigerant circulation loop, the state of each heat exchange branch meets the target state. In this way, by controlling the shunt form of the throttling heat exchanger to the refrigerant, the exhaust temperature is reduced or kept unchanged. Without making the air conditioner run at a low frequency, the running state of other components does not need to be adjusted, and the high-frequency operation of the air conditioner can be ensured. In this way, the air conditioner can have enough capacity to release at high temperature, thereby ensuring the performance of the air conditioner.

[0152] In combination with Figure 13 As shown, the embodiment of the present disclosure provides a device for controlling an air conditioner, comprising a processor 130 and a memory 131. Optionally, the device can further comprise a communication interface 132 and a bus 133. The processor 130, the communication interface 132 and the memory 131 can complete mutual communication through the bus 133. The communication interface 132 can be used for information transmission. The processor 130 can call the logical instructions in the memory 131 to execute the method for controlling an air conditioner of the above-mentioned embodiments.

[0153] In addition, the logical instructions in the memory 131 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.

[0154] The memory 131 as a computer readable storage medium can be used to store software programs, computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 130 executes the program instructions / modules stored in the memory 131, thereby performing function applications and data processing, i.e. implementing the method for controlling an air conditioner in the above-mentioned embodiments.

[0155] The memory 131 may include a program storage area and a data storage area. The program storage area may store an operating system and application programs required for at least one function; the data storage area may store data generated based on the use of the terminal device. Furthermore, the memory 131 may include high-speed random access memory and non-volatile memory.

[0156] An embodiment of the present disclosure provides an air conditioner, comprising the above-mentioned device for controlling an air conditioner.

[0157] An embodiment of the present disclosure provides a storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for controlling an air conditioner.

[0158] The aforementioned storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0159] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible variations. Unless explicitly required, 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 words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include plural forms. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listings. In addition, when used in this application, the term "comprise" and its variations "comprises" and / or comprising refer to the presence of 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 of these. In the absence of further restrictions, an element defined by the sentence "comprising a..." does not exclude the presence of other identical elements in the process, method or device that includes the element. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments can be referenced to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can be found in the description of the method part.

[0160] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person can use different methods for each specific application to realize the described functions, but such implementation should not be considered beyond 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 above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0161] 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 above-described device embodiments are only schematic, for example, the division of the units can only be a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms. The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to implement the embodiments. In addition, each functional unit in the embodiments of the present disclosure can be integrated in one processing unit, or each unit can be a physically independent unit, or two or more units can be integrated in one unit.

[0162] The computer program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other processing device to cause a series of operational steps to be performed on the computer, other programmable apparatus or other processing device to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks.

Claims

1. A method for controlling an air conditioner, characterized by, The air conditioner comprises: a throttling heat exchanger; the throttling heat exchanger comprises: a heat exchange pipeline, a first distributor and a throttling element, the heat exchange pipeline comprises and is connected in communication with a first heat exchange branch, a second heat exchange branch and a third heat exchange branch; the first distributor comprises a first distribution branch pipe and a second distribution branch pipe, the first distribution branch pipe is provided with a first throttling element, and the second distribution branch pipe is provided with a second throttling element; a refrigerant outlet of the first heat exchange branch and the second heat exchange branch is connected in communication with a second distributor, a refrigerant inlet of the second heat exchange branch and the third heat exchange branch is connected in communication with a third distributor, a refrigerant inlet of the first heat exchange branch is connected in communication with a fourth distributor, the first throttling element is arranged between the first distribution branch pipe and the second distributor, and the second throttling element is arranged between the second distribution branch pipe and the third heat exchange branch; a bypass pipeline connects the third distributor and the fourth distributor; The compressor is connected in communication with the fourth distributor of the throttling heat exchanger through a first pipeline; the first distributor is connected in communication with an indoor heat exchanger through a second pipeline; the indoor heat exchanger is connected in communication with the compressor through a third pipeline; the compressor, the first pipeline, the throttling heat exchanger, the second pipeline, the indoor heat exchanger and the third pipeline form a first refrigerant circulation loop; A first end of a fourth pipeline is connected in communication with a first position on the first pipeline, and a second end is connected in communication with a second position on the second pipeline; a first end of a fifth pipeline is connected in communication with a third position on the first pipeline, and a second end is connected in communication with a fourth position on the second pipeline; the compressor, the fourth pipeline, the throttling heat exchanger, the fifth pipeline, the indoor heat exchanger and the third pipeline form a second refrigerant circulation loop; By switching the on-off state of the first refrigerant circulation loop and the second refrigerant circulation loop, each heat exchange branch can be switched between a parallel connection and a series connection; the method comprises: In the case that the air conditioner operates in a cooling mode, an exhaust temperature of the air conditioner is obtained; According to the exhaust temperature, it is determined whether the air conditioner has a frequency reduction demand; in the case that the exhaust temperature is less than a temperature threshold, it is determined that the air conditioner does not have a frequency reduction demand; in the case that the exhaust temperature is greater than or equal to the temperature threshold, it is determined that the air conditioner has a frequency reduction demand; According to the frequency reduction demand, a target state of each heat exchange branch is determined; in the case that the air conditioner does not have a frequency reduction demand, the target state is determined to be a series connection; in the case that the air conditioner has a frequency reduction demand, the target state is determined to be a parallel connection; According to the target state, the on-off state of the first refrigerant circulation loop and the second refrigerant circulation loop is controlled.

2. The method of claim 1, wherein, According to the target state, the on-off state of the first refrigerant circulation loop and the second refrigerant circulation loop is controlled, comprising: In the case that the target state is a series connection, the first refrigerant circulation loop and the second refrigerant circulation loop are controlled to maintain the current on-off state; In a case where the target state is the parallel-serial-parallel state, the first refrigerant circulation circuit and the second refrigerant circulation circuit are controlled to switch between the on state and the off state.

3. The method of claim 2, wherein, In a case where the air conditioner is operating in the cooling mode, the current state of each heat exchange branch is the serial-parallel-serial state; the control of the first refrigerant circulation circuit and the second refrigerant circulation circuit to switch between the on state and the off state comprises: The first refrigerant circulation circuit is controlled to be off, and the second refrigerant circulation circuit is controlled to be on, so that the state of each heat exchange branch is switched to the parallel-serial-parallel state.

4. The method of claim 1, wherein, After the control of the first refrigerant circulation circuit and the second refrigerant circulation circuit to switch between the on state and the off state, the method further comprises: An instantaneous discharge temperature of the air conditioner is obtained. The operating frequency of the air conditioner is controlled according to the instantaneous discharge temperature.

5. The method of claim 4, wherein, The control of the operating frequency of the air conditioner according to the instantaneous discharge temperature comprises: In a case where the instantaneous discharge temperature is less than a temperature threshold, the air conditioner is controlled to operate at the current frequency; In a case where the instantaneous discharge temperature is greater than or equal to the temperature threshold, the air conditioner is controlled to operate at a reduced frequency.

6. The method of claim 5, wherein, The control of the air conditioner to operate at a reduced frequency comprises: A target frequency reduction rate corresponding to the instantaneous discharge temperature is determined according to the correlation between the discharge temperature and the frequency reduction rate; The air conditioner is controlled to operate at the target frequency reduction rate.

7. The method of claim 5, wherein, After the control of the air conditioner to operate at a reduced frequency, the method further comprises: In a case where the current discharge temperature is less than the temperature threshold, the air conditioner is controlled to operate at the current frequency; In a case where the outdoor environment temperature is less than a preset temperature, the air conditioner is controlled to operate at a preset frequency increase rate; In a case where the operating frequency is increased to the initial frequency and the discharge temperature is less than the temperature threshold, the on-off state of the first refrigerant circulation circuit and the second refrigerant circulation circuit is controlled according to the discharge temperature.

8. The method of claim 7, wherein, The control of the on-off state of the first refrigerant circulation circuit and the second refrigerant circulation circuit according to the discharge temperature comprises: A temperature difference between the temperature threshold and the current discharge temperature is calculated; If the temperature difference is greater than a temperature difference threshold, the first refrigerant circulation circuit and the second refrigerant circulation circuit are controlled to switch to the initial state; If the temperature difference is less than or equal to the temperature difference threshold, the first refrigerant circulation circuit and the second refrigerant circulation circuit are controlled to maintain the current on-off state.

9. An apparatus for controlling an air conditioner, comprising a processor and a memory having stored program instructions, characterized in that, The processor is configured to execute the method for controlling an air conditioner as claimed in any one of claims 1 to 8 when the program instructions are executed.

10. An air conditioner comprising: A throttling heat exchanger; The throttling heat exchanger comprises a plurality of heat exchange branches; characterized in that the air conditioner further comprises: A first refrigerant circulation circuit and a second refrigerant circulation circuit sharing the throttling heat exchanger; by switching the on-off state of the first refrigerant circulation circuit and the second refrigerant circulation circuit, each heat exchange branch can be switched between the parallel-serial-parallel state and the serial-parallel-serial state; and The device for controlling an air conditioner as claimed in claim 9.

11. A storage medium storing program instructions, characterized in that, The program instructions are executed to perform the method for controlling an air conditioner as claimed in any one of claims 1 to 8.

Images