Operation control method, device, air conditioner and storage medium of a fixed-frequency air conditioner

Abstract

The present application discloses an operation control method, device, air conditioner and storage medium for a fixed-frequency air conditioner. The fixed-frequency air conditioner includes a compressor, a four-way valve, an indoor heat exchanger, a throttling device and an outdoor heat exchanger connected in sequence through pipelines, and further includes a bypass branch connecting the compressor and the outdoor heat exchanger, and a flow regulation branch connected to the throttling device. The operation control method includes: in the heating mode, obtaining the operation parameters of the fixed-frequency air conditioner; judging whether the operation parameters meet the preset conditions according to the operation parameters; if the operation parameters meet the preset conditions, controlling the bypass branch or the flow regulation branch to adjust the operation load of the fixed-frequency air conditioner. By judging that the operation parameters meet the preset conditions, the bypass branch or the flow regulation branch is controlled to adjust the operation load of the fixed-frequency air conditioner, so as to alleviate the problem of frequent shutdown of the fixed-frequency air conditioner, thereby improving the operation reliability of the air conditioner.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and in particular, to an operation control method, device, air conditioner and storage medium for a fixed-frequency air conditioner. Background Art

[0002] As people's requirements for the comfort of air conditioners are getting higher and higher, the frequent start and stop of air conditioners will affect the user experience. When the air conditioner is operating in heating mode in winter, there are mainly the following frequent shutdown phenomena: First, when the air conditioner is heating at low temperature, since the surface temperature of the evaporator will reach below zero degrees Celsius, frost may form on the surface of the evaporator. The thick frost layer will cause the air flow to be blocked, affecting the heating capacity of the air conditioner. Therefore, the air conditioner needs to perform defrosting regularly. And when the air conditioner defrosts at low temperature, it will cause the compressor of the air conditioner to stop frequently in the heating mode. Second, the air conditioner starts after the indoor temperature reaches the set temperature during heating. Therefore, the frequent start and stop of the air conditioner easily affects the user experience when using the air conditioner. Summary of the Invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present application proposes an operation control method, device and air conditioner for a fixed-frequency air conditioner, which can alleviate the problem of frequent shutdown of the fixed-frequency air conditioner, thereby improving the operation reliability of the air conditioner.

[0004] In the first aspect of the present application, there is provided an operation control method for a fixed-frequency air conditioner as described above. The fixed-frequency air conditioner includes a compressor, a four-way valve, an indoor heat exchanger, a throttling device and an outdoor heat exchanger connected in sequence through pipelines, and further includes a bypass branch connecting the compressor and the outdoor heat exchanger, and a flow regulation branch connected to the throttling device. The operation control method includes:

[0005] In the heating mode, obtain the operation parameters of the fixed-frequency air conditioner;

[0006] Judge whether the operation parameters meet the preset conditions;

[0007] If the operation parameters meet the preset conditions, control the bypass branch or the flow regulation branch to adjust the operation load of the fixed-frequency air conditioner.

[0008] According to the operation control method of the fixed-frequency air conditioner in the embodiment of the present application, it has at least the following beneficial effects: When the fixed-frequency air conditioner is in the heating mode, obtain the operation parameters of the fixed-frequency air conditioner. If the operation parameters meet the preset conditions, it means that the fixed-frequency air conditioner will stop. Therefore, by controlling the bypass branch or the flow regulation branch to adjust the operation load of the fixed-frequency air conditioner, the problem of frequent shutdown of the fixed-frequency air conditioner can be alleviated, thereby improving the operation reliability of the air conditioner.

[0009] According to some embodiments of the present application, the operating parameters include the operating current of the air conditioner and the operating voltage of the air conditioner, and the preset condition includes a first condition, where the first condition is that the rising rate of the operating current of the air conditioner is greater than a first set value and the duration is greater than a first time threshold, or the falling rate of the operating voltage of the air conditioner is greater than a second set value and the duration is greater than a second time threshold;

[0010] If the operating parameters meet the first condition, control the flow regulating branch to conduct.

[0011] According to some embodiments of the present application, it further includes:

[0012] If the rising rate of the operating current of the air conditioner is less than a third set value or the falling rate of the operating voltage of the air conditioner is less than a fourth set value, control the flow regulating branch to turn off, where the third set value is less than the first set value and the fourth set value is less than the second set value.

[0013] According to some embodiments of the present application, the operating parameters include the outlet air temperature, the indoor ambient temperature, and the temperature-reaching shutdown compensation temperature; the preset condition includes a second condition, where the second condition is that the outlet air temperature is less than the sum of the indoor ambient temperature, the temperature-reaching compensation temperature, and a fifth set value;

[0014] If the operating parameters meet the second condition, control the flow regulating branch to conduct.

[0015] According to some embodiments of the present application, it further includes:

[0016] If the rising rate of the operating current of the air conditioner is less than a third set value or the falling rate of the operating voltage of the air conditioner is less than a fourth set value, control the flow regulating branch to turn off, where the third set value is less than the first set value and the fourth set value is less than the second set value.

[0017] According to some embodiments of the present application, the operating parameters include the outlet air temperature, the indoor ambient temperature, and the temperature-reaching shutdown compensation temperature; the preset condition includes a second condition, where the second condition is that the outlet air temperature is less than the sum of the indoor ambient temperature, the temperature-reaching compensation temperature, and a fifth set value;

[0018] If the operating parameters meet the second condition, control the flow regulating branch to conduct.

[0019] According to some embodiments of the present application, it further includes:

[0020] If the outlet air temperature is greater than the sum of the indoor ambient temperature, the temperature-reaching shutdown compensation temperature, the fifth set value, and a sixth set value, control the flow regulating branch to turn off.

[0021] According to some embodiments of the present application, it further includes:

[0022] Record the number of times the flow regulation branch is turned on. If the number of times reaches the seventh set value, prohibit the flow regulation branch from being turned on again.

[0023] According to some embodiments of the present application, it further includes:

[0024] If the fixed-frequency air conditioner restarts, clear the number of times of conduction.

[0025] According to some embodiments of the present application, the fixed-frequency air conditioner is powered by a generator. The operating parameters include the maximum operating current during the heating defrosting cycle and the outlet temperature of the outdoor heat exchanger. The preset conditions include a third condition. The third condition is that the maximum operating current during the heating defrosting cycle is greater than the first set ratio multiplied by the rated current of the generator and the outlet temperature of the outdoor heat exchanger is less than the eighth set value, or the change rate of the output voltage of the generator is greater than the ninth set value and the outlet temperature of the heat exchanger is less than the eighth set value;

[0026] If the operating parameters meet the third condition, control the bypass branch to be turned on.

[0027] According to some embodiments of the present application, the operating parameters further include the indoor ambient temperature. If the operating parameters meet the fourth condition, control the bypass branch to be turned off. The fourth condition includes any one or more of the following:

[0028] After the bypass branch is turned on, the change in the outlet temperature of the outdoor heat exchanger is greater than the tenth set value;

[0029] The difference between the outlet temperature of the outdoor heat exchanger and the indoor ambient temperature is greater than the tenth set value;

[0030] The time for which the bypass branch is turned on is greater than the third time threshold.

[0031] According to some embodiments of the present application, it further includes:

[0032] If the number of times the bypass branch is turned on reaches the twelfth set value, prohibit the bypass branch from being turned on again.

[0033] According to some embodiments of the present application, it further includes:

[0034] If the change rate of the operating circuit of the air conditioner is less than the thirteenth set value, control the bypass branch and the flow regulation branch to be turned off.

[0035] The operation control device according to the second aspect embodiment of the present application includes at least one control processor and a memory for communicatively connecting with the at least one control processor; the memory stores instructions executable by the at least one control processor, and the instructions are executed by the at least one controller processor so that the at least one control processor can execute the operation control method of the fixed-frequency air conditioner as in the first aspect.

[0036] The fixed-frequency air conditioner according to the third aspect embodiment of the present application includes the operation control device described in the second aspect.

[0037] The computer-readable storage medium of the fixed-frequency air conditioner according to the third aspect embodiment of the present application, the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to make a computer execute the operation control method of the fixed-frequency air conditioner as described in any item of the first aspect.

[0038] The additional aspects and advantages of the present application will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present application. Description of the Drawings

[0039] Figure 1 It is a schematic diagram of modules of a specific embodiment of an operation control device in an embodiment of the present application;

[0040] Figure 2 It is a system module diagram of a specific embodiment of a fixed-frequency air conditioner in an embodiment of the present application;

[0041] Figure 3 It is a system module diagram of another specific embodiment of a fixed-frequency air conditioner in an embodiment of the present application;

[0042] Figure 4 It is a schematic flowchart of a specific embodiment of an operation control method of a fixed-frequency air conditioner in an embodiment of the present application;

[0043] Figure 5 It is a schematic flowchart of another specific embodiment of an operation control method of a fixed-frequency air conditioner in an embodiment of the present application;

[0044] Figure 6 It is a schematic flowchart of another specific embodiment of an operation control method of a fixed-frequency air conditioner in an embodiment of the present application;

[0045] Figure 7 It is a schematic flowchart of another specific embodiment of an operation control method of a fixed-frequency air conditioner in an embodiment of the present application;

[0046] Figure 8 It is a schematic flowchart of another specific embodiment of an operation control method of a fixed-frequency air conditioner in an embodiment of the present application;

[0047] Figure 9 It is a schematic flowchart of another specific embodiment of an operation control method for a fixed-frequency air conditioner in an embodiment of the present application;

[0048] Figure 10 It is a schematic flowchart of another specific embodiment of an operation control method for a fixed-frequency air conditioner in an embodiment of the present application;

[0049] Figure 11 It is a schematic flowchart of another specific embodiment of an operation control method for a fixed-frequency air conditioner in an embodiment of the present application;

[0050] Figure 12 It is a schematic flowchart of another specific embodiment of an operation control method for a fixed-frequency air conditioner in an embodiment of the present application;

[0051] Figure 13 It is a schematic flowchart of another specific embodiment of an operation control method for a fixed-frequency air conditioner in an embodiment of the present application;

[0052] Figure 14 It is a schematic flowchart of another specific embodiment of an operation control method for a fixed-frequency air conditioner in an embodiment of the present application. Detailed implementation manners

[0053] The embodiments of the present application will be described in detail below. The exemplary examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are only exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0054] In the description of the present application, it should be understood that for the orientation description, the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than referring to or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0055] In the description of the present application, the meaning of "several" is one or more, the meaning of "multiple" is two or more, "greater than", "less than", "exceeding", etc. are understood as not including the recited number, and "above", "below", "within", etc. are understood as including the recited number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of the technical features represented or implicitly indicating the sequence relationship of the technical features indicated.

[0056] In the description of the present application, unless otherwise clearly defined, terms such as "setting", "installation", "connection", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present application in combination with the specific content of the technical solution.

[0057] With the wide application of air conditioners, people's requirements for the performance of air conditioners are gradually increasing. Among them, there is a phenomenon of frequent shutdown when the air conditioner is in the heating mode. The reasons for the relatively frequent shutdown of the air conditioner are as follows: 1) Frequent shutdown due to defrosting in low-temperature heating, 2) Shutdown when the indoor temperature reaches the set temperature in heating. Air conditioners include variable-frequency air conditioners and fixed-frequency air conditioners. The variable-frequency air conditioner can reduce the heating load by reducing the frequency to avoid frequent shutdown of the air conditioner. However, the fixed-frequency air conditioner cannot reduce the frequency, so the fixed-frequency air conditioner cannot solve the problem of frequent shutdown in the heating mode, resulting in a decline in the user experience.

[0058] Based on this, the present application provides an operation control method for a fixed-frequency air conditioner. By adding a flow regulation branch and a branch bypass branch to the original control system of the air conditioner, the opening and closing of the bypass branch or the flow regulation branch are controlled to alleviate the problem of frequent shutdown of the air conditioner in the heating mode and improve the operation reliability of the air conditioner.

[0059] The following further elaborates on the embodiments of the present application in conjunction with the accompanying drawings.

[0060] As Figure 1 shown, Figure 1 is a schematic diagram of an operation control device for executing the operation control method of a fixed-frequency air conditioner provided by an embodiment of the present application. The operation control device 100 of the embodiment of the present application can be built into the air conditioner and includes one or more control processors 110 and a memory 120. Figure 1 Here, one control processor 110 and one memory 120 are taken as examples. The control processor 110 and the memory 120 can be connected through a bus or other means. Figure 1 Here, the connection through a bus is taken as an example. The memory 120, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. In addition, the memory 120 can include high-speed random access memory and can also include non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices.

[0061] In some embodiments, the memory 120 may optionally include a memory 120 remotely set relative to the control processor 110, and these remote memories can be connected to the operation control device 100 through a network. Examples of the above network include, but are not limited to, the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0062] Those skilled in the art can understand.Figure 1 The device structure shown does not constitute a limitation on the operation control device 100, and it may include more or fewer components than those shown, or combine certain components, or have different component arrangements.

[0063] In Figure 1 In the operation control device 100 shown, the control processor 110 can be used to call the air conditioner operation control program stored in the memory 120 to implement the operation control method of the fixed-frequency air conditioner.

[0064] Based on the hardware structure of the above operation control device 100, various embodiments of the operation control method of the fixed-frequency air conditioner of the present application are proposed.

[0065] Referring to Figure 2 and Figure 4 , the operation control method of the fixed-frequency air conditioner 200 disclosed in this embodiment is applied to the fixed-frequency air conditioner 200, and the fixed-frequency air conditioner 200 includes a compressor 210, a four-way valve 220, an outdoor heat exchanger 230, an indoor heat exchanger 250, and a throttling device 240 connected in sequence through pipelines. The fixed-frequency air conditioner 200 further includes a flow regulation branch 270 connected to the throttling device 240 and a bypass branch 260 communicating the outdoor heat exchanger 230 with the compressor 210. The operation control method includes but is not limited to the following steps:

[0066] S100. In the heating mode, obtain the operation parameters of the fixed-frequency air conditioner;

[0067] S200. Determine whether the operation parameters meet the preset conditions according to the operation parameters;

[0068] S300. If the operation parameters meet the preset conditions, control the bypass branch or the flow regulation branch to adjust the operation load of the fixed-frequency air conditioner.

[0069] Since the air conditioner is prone to frequent shutdown in the heating mode, which easily leads to a decline in the user experience, when the air conditioner is in the heating mode, the operation parameters are obtained, and it is determined whether the operation parameters meet the preset conditions. If the operation parameters meet the preset conditions, that is, the fixed-frequency air conditioner will shut down. Therefore, by controlling the flow regulation branch or the bypass branch to adjust the operation load of the fixed-frequency air conditioner, the frequent shutdown phenomenon of the fixed-frequency air conditioner can be alleviated, thereby improving the user experience.

[0070] It should be noted that, referring to Figure 2, the flow regulation branch 270 is in parallel with the throttling device 240. Among them, a second solenoid valve K2 and a capillary tube are provided on the flow regulation branch 270. The capillary tube is in series with the second solenoid valve K2, and the series-connected capillary tube and the second solenoid valve K2 are in parallel with the throttling device 240. A first solenoid valve K1 is provided on the bypass branch 260. One end of the first solenoid valve K1 is connected to the outdoor heat exchanger 230 and the throttling device 240, and the other end is connected to the compressor 210 and the four-way valve 220. Therefore, by controlling the opening and closing of the first solenoid valve K1 to control the conduction or cut-off of the bypass valve branch, and controlling the opening and closing of the second solenoid valve K2 to control the conduction or closing of the flow regulation branch 270. Therefore, only by controlling the opening and closing of the first solenoid valve K1 and the second solenoid valve K2 can the conduction or cut-off of the bypass branch 260 and the flow regulation branch 270 be realized, making the operation of adjusting the operating load of the fixed-frequency air conditioner 200 simple.

[0071] In some embodiments, referring to Figure 3 , the flow regulation branch 270 is in parallel with the throttling device 240 and the indoor heat exchanger 250. Among them, the flow regulation branch 270 includes a second electromagnetic K2 valve and a capillary tube. One end of the second solenoid valve K2 is connected to the throttling device 240 and the bypass branch 260, and the other end is connected between the indoor heat exchanger 250 and the four-way valve 220. Therefore, by controlling the conduction or cut-off of the flow regulation branch 270, the current of the throttling device 240 and the indoor heat exchanger 250 is adjusted, so as to realize the adjustment of the operating load of the fixed-frequency air conditioner 200.

[0072] In some embodiments, the operating parameters include: the operating voltage of the air conditioner and the operating current of the air conditioner, and the preset conditions include a first condition. The first condition is that the drop rate of the operating voltage of the air conditioner is greater than a second set value and the duration is greater than a second time threshold, or the rise rate of the operating current of the air conditioner is greater than a first set value and the duration is greater than a first time threshold. When the preset condition is the first condition, Figure 5 , step S300 includes:

[0073] S310. If the operating parameters meet the first condition, control the flow regulation branch to conduct.

[0074] When the operating parameters meet the first condition, since the operating current of the air conditioner continues to rise and the rise rate is greater than the first set value, the fixed-frequency air conditioner will stop running, or when the operating voltage of the air conditioner continues to drop and the drop rate is greater than the second set value, the fixed-frequency air conditioner is also likely to stop running. Therefore, for these two situations, by controlling the conduction of the flow regulation branch to reduce the operating load of the fixed-frequency air conditioner, so as to slow down the frequent shutdown of the fixed-frequency air conditioner.

[0075] Among them, referring to Figure 2, a second solenoid valve K2 and a capillary tube are provided on the flow rate regulating branch 270. When the operating parameters meet the first condition, the second solenoid valve K2 is controlled to start, then the flow rate regulating branch 270 is turned on, and the capillary tube is connected in parallel with the throttling device 240 to reduce the current of the throttling device 240, thereby reducing the operating load of the fixed-frequency air conditioner 200 and reducing the frequent shutdown of the fixed-frequency air conditioner 200.

[0076] Specifically, let the operating current of the air conditioner be I, the operating voltage of the air conditioner be U, the rising rate of the operating current of the air conditioner be △I, and the falling rate of the operating voltage of the air conditioner be △U. If the first set value is Z1, the second set value is Z2, the first time threshold is T1, and the second time threshold is T2. Therefore, it is judged whether the rising rate △I of the operating current of the air conditioner is greater than Z1 and the duration is greater than T1, then the second solenoid valve K2 is controlled to open to turn on the flow rate regulating branch 270, or the falling rate △U of the operating voltage of the air conditioner is greater than Z2 and the duration is greater than T2, and the second solenoid valve K2 is also controlled to open to turn on the flow rate regulating branch 270. Therefore, by judging whether the duration of the rising rate of the operating current of the air conditioner and the falling rate of the operating voltage of the air conditioner exceeds T1 and T2 to control the opening of the second solenoid valve K2, the operation of reducing the operating load of the fixed-frequency air conditioner 200 is simple, and the frequent shutdown of the fixed-frequency air conditioner 200 can be slowed down to improve the operating reliability of the fixed-frequency air conditioner 200.

[0077] In some embodiments, referring to Figure 6 , the operation control method further includes:

[0078] S320. If the rising rate of the operating current of the air conditioner is less than the third set value or the falling rate of the operating voltage of the air conditioner is less than the fourth set value, control the flow rate regulating branch to be turned off, where the third set value is less than the first set value and the fourth set value is less than the second set value.

[0079] When the operating parameters meet the first condition, the flow rate regulating branch is controlled to be turned on. Therefore, when it is detected that the falling rate of the operating voltage of the air conditioner is less than the fourth set value, or the operating current of the air conditioner is less than the third set value, it means that the load of the fixed-frequency air conditioner is not high, so there is no need to unload the load, so the flow rate regulating branch is controlled to be turned off to enable the fixed-frequency air conditioner to return to the normal working mode.

[0080] Among them, referring to Figure 2 , the flow rate regulating branch 270 is provided with a second solenoid valve K2 and a capillary tube. Therefore, it is necessary to control the flow rate regulating branch 270 to be turned off, that is, the second solenoid valve K2 is closed to turn off the flow rate regulating branch 270, then the capillary tube will no longer be connected in parallel with the throttling device 240, so the current of the throttling device 240 increases, and the entire fixed-frequency air conditioner 200 returns to the normal working mode.

[0081] Specifically, the third set value is Z3 and the fourth set value is Z4. Therefore, it is determined that the rising rate of the operating current of the air conditioner △I < Z3 or the falling rate of the operating voltage of the air conditioner △U < Z4, that is, the system load of the fixed-frequency air conditioner 200 is not high and will not cause shutdown. Therefore, the second solenoid valve K2 is controlled to close, so that the current of the throttling device 240 returns to the current during normal operation, and the fixed-frequency air conditioner 200 operates normally. Therefore, by controlling the second solenoid valve K2 to close, the normal operation of the fixed-frequency air conditioner 200 can be restored when it is detected that the load of the fixed-frequency air conditioner 200 is not high, making the operation of restoring the normal operation of the fixed-frequency air conditioner 200 simple.

[0082] In some embodiments, the operating parameters include: the outlet air temperature, the temperature compensation for reaching the set temperature and shutting down, and the indoor ambient temperature; the preset condition includes a second condition, and the second condition is that the outlet air temperature is less than the sum of the indoor ambient temperature, the temperature compensation for reaching the set temperature and shutting down, and the fifth set value. Among them, referring to Figure 7 , step S300 further includes:

[0083] S330. If the operating parameters meet the second condition, control the flow regulation branch to conduct.

[0084] Since the fixed-frequency air conditioner will shut down when reaching the set temperature, it is necessary to detect the outlet air temperature. If the difference between the outlet air temperature and the temperature compensation for reaching the set temperature and shutting down, and the indoor ambient temperature is less than the fifth set value, it means that the fixed-frequency air conditioner has heated the indoor ambient temperature to meet a certain threshold, so the fixed-frequency air conditioner will perform a shutdown operation. Therefore, when it is detected that the operating parameters meet the second condition, it is necessary to conduct the flow regulation branch to reduce the operating load of the fixed-frequency air conditioner through the conduction of the flow regulation branch, thereby slowing down the frequent shutdown of the fixed-frequency air conditioner.

[0085] Among them, referring to Figure 2 , the flow regulation branch 270 is provided with a second solenoid valve K2 and a capillary tube. Therefore, when the operating parameters meet the second condition, the second solenoid valve K2 is controlled to open to make the flow regulation branch 270 conduct, thereby reducing the current of the throttling device 240, reducing the operating load of the fixed-frequency air conditioner 200, slowing down the frequent shutdown of the fixed-frequency air conditioner 200, and thus improving the user experience of using the fixed-frequency air conditioner 200.

[0086] Specifically, the outlet air temperature is Tout, the indoor ambient temperature is T1, the temperature compensation for reaching the set temperature and shutting down is m, and the fifth set value is Z5. If the outlet air temperature is less than the sum of the indoor ambient temperature, the temperature compensation for reaching the set temperature and shutting down, and the fifth set value, that is, when Tout < T1 + m + Z5, control the second solenoid valve K2 to open to make the flow regulation branch 270 conduct, so as to reduce the current of the throttling device 240, thereby reducing the operating load of the entire system, and slowing down the frequent shutdown phenomenon of the fixed-frequency air conditioner 200, thus reducing the situation where the user experience is poor due to frequent shutdowns.

[0087] In some embodiments, referring to Figure 8 , the operation control method further includes:

[0088] S340. If the air outlet temperature is greater than the sum of the indoor ambient temperature, the temperature compensation for reaching the set temperature and stopping operation, the fifth set value, and the sixth set value, control the flow regulation branch to be turned off.

[0089] According to Figure 2 , after the second electromagnetic valve K2 is opened, if it is detected that the difference between the air outlet temperature and the sum of the temperature compensation for reaching the set temperature and stopping operation and the indoor ambient temperature is greater than the sum of the fifth set value and the sixth set value, it means that the fixed-frequency air conditioner 200 will not stop operating due to reaching the set temperature. Therefore, control the flow regulation branch 270 to be turned off, the current of the throttling device 240 becomes higher, and the fixed-frequency air conditioner 200 resumes normal operation.

[0090] Specifically, the sixth set value is Z6. If it is detected that the difference between the air outlet temperature and the sum of the temperature compensation for reaching the set temperature and stopping operation and the indoor ambient temperature is greater than the sum of the fifth set value and the sixth set value, that is, when Tout - T1 - m > Z5 + Z6, control the second electromagnetic valve K2 to close. When the second electromagnetic valve K2 closes, the capillary tube is no longer in parallel with the throttling device 240, and the current of the throttling device 240 returns to the current during normal operation, and the fixed-frequency air conditioner 200 resumes normal operation. Therefore, by controlling the second electromagnetic valve K2 to change the operating load of the fixed-frequency air conditioner 200, the operation of making the fixed-frequency air conditioner 200 resume normal operation after reducing the operating load is simple.

[0091] In some embodiments, referring to Figure 9 , the operation control method further includes:

[0092] S350. Record the conduction times of the flow regulation branch. If the conduction times reach the seventh set value, prohibit the flow regulation branch from conducting again.

[0093] By controlling the conduction or cutoff of the flow regulation branch to adjust the operating load of the fixed-frequency air conditioner, however, when the switching between the conduction and cutoff of the flow regulation branch is too frequent, it will affect the operation of the fixed-frequency air conditioner. Therefore, by recording the conduction times of the flow regulation branch, if the conduction times exceed the seventh set value, the flow regulation branch is kept off and no longer controlled to conduct, so that the fixed-frequency air conditioner can operate normally.

[0094] Specifically, referring to Figure 2 , the seventh set value is Z7. Record the conduction times of the flow regulation branch 270 as N. If N > Z7, control the second electromagnetic valve K2 to remain closed and no longer control the second electromagnetic valve K2 to open, so that the fixed-frequency air conditioner 200 operates normally. Therefore, by controlling the second electromagnetic valve K2 to be normally closed to achieve the normal operation of the fixed-frequency air conditioner 200, the adjustment of the operating load of the fixed-frequency air conditioner 200 is simple.

[0095] In some embodiments, referring to Figure 10 , the operation control method further includes:

[0096] S360. If the fixed-frequency air conditioner restarts, clear the conduction times.

[0097] When recording the conduction times of the flow regulation branch, when the fixed-frequency air conditioner restarts, the conduction times are no longer recorded, and the originally recorded conduction times are cleared, and after the fixed-frequency air conditioner restarts, the conduction times are recorded again. Therefore, the conduction times are only recorded after each start of the fixed-frequency air conditioner, so that it is possible to detect whether it is necessary to control the flow regulation branch to adjust the operating load of the fixed-frequency air conditioner after each start of the fixed-frequency air conditioner, and prevent the conduction times from affecting the control of the flow regulation branch.

[0098] In some embodiments, the fixed-frequency air conditioner is connected to a generator, and the generator supplies electrical energy to the air conditioner. The operating parameters include the outdoor heat exchanger outlet temperature and the maximum operating current during the heating defrost cycle. The preset conditions include a third condition. The third condition is that the change rate of the output voltage of the generator is greater than a ninth set value and the heat exchanger outlet temperature is less than an eighth set value, or the outdoor heat exchanger outlet temperature is less than an eighth set value and the maximum operating current during the heating defrost cycle is greater than a first set ratio multiplied by the rated current of the generator. Referring to Figure 11 , step S300 further includes:

[0099] S370. If the operating parameters meet the third condition, control the bypass branch to conduct.

[0100] Since the power supply of the fixed-frequency air conditioner is a generator, when the generator supplies power to the fixed-frequency air conditioner, the starting current of the fixed-frequency air conditioner is extremely likely to exceed the maximum rated current of the generator, resulting in the generator having an overload protection shutdown. Therefore, the frequent start and stop of the fixed-frequency air conditioner in the heating mode will affect the normal operation of the generator. Therefore, by reducing the frequent start and stop of the fixed-frequency air conditioner, the generator can supply power stably. Record the maximum operating current of the entire system during the heating defrost cycle. If the maximum operating current is greater than the rated current of the generator multiplied by the first set ratio and the outdoor heat exchanger outlet temperature is less than the eighth set value, or the change rate of the output voltage of the generator is greater than the ninth set value and the outdoor heat exchanger outlet temperature is less than the eighth set value, it means that the fixed-frequency air conditioner will stop during the heating defrost cycle, which will affect the normal operation of the generator. Therefore, control the bypass branch to conduct to adjust the operating load of the fixed-frequency air conditioner and reduce the shutdown of the fixed-frequency air conditioner to ensure the stable operation of the generator.

[0101] Specifically, referring to Figure 2, the outlet temperature of the outdoor heat exchanger is T3, the maximum operating current is Imax, the rated current of the generator is Iemax, the rate of change of the output voltage of the generator is △Ue, the eighth set value is Z8, the ninth set value is Z9, and the first set ratio is p. A first solenoid valve K1 is provided on the bypass branch 260, and the conduction or cut-off of the bypass branch 260 is determined by controlling the opening or closing of the first solenoid valve K1. When the fixed-frequency air conditioner 200 is in the cooling mode, the four-way valve 220 is not energized and is recorded as 0; when the fixed-frequency air conditioner 200 is in the heating mode, the four-way valve 220 is energized and is recorded as 1. Therefore, in the heating mode condition, the four-way valve 220 completing the 1-0-1 process is a conventional heating defrost cycle. Record the maximum operating current Imax of the fixed-frequency air conditioner 200 during this process. If Imax > p*Iemax and T3 < Z8, or △Ue > Z9 and T3 < Z8, then control the first solenoid valve K1 to open. Therefore, the bypass branch 260 is conducted. After the bypass branch 260 is conducted, the high-temperature exhaust gas of the compressor 210 is divided into two paths. One path passes through the four-way valve 220, the indoor heat exchanger 250, the throttling device 240, and the outdoor heat exchanger 230 and then returns to the compressor 210. The other path directly enters the outdoor heat exchanger 230 after passing through the bypass branch 260, so as to adjust the operating load of the fixed-frequency air conditioner 200 by controlling the conduction of the bypass branch 260, thereby slowing down the frequent shutdown of the fixed-frequency air conditioner 200 and enabling the generator to operate stably.

[0102] In some embodiments, if the maximum operating current in the heating defrost cycle is less than the second set value multiplied by the rated current of the generator, or the rate of change of the output voltage of the generator is less than the fourteenth set value, then control the bypass branch to be cut off, and the fourteenth set value is less than the ninth set value. Therefore, by judging that the maximum operating current in the heating defrost cycle is less than the second set value multiplied by the rated current of the large generator, or the rate of change of the output voltage of the generator is less than the fourteenth set value, it means that the fixed-frequency air conditioner will not affect the normal operation of the generator during the heating defrost process. Therefore, there is no need to reduce the operating load of the fixed-frequency air conditioner to prevent the fixed-frequency air conditioner from shutting down.

[0103] In some embodiments, referring to Figure 12 , the operation control method further includes:

[0104] S380, if the operation parameters meet the fourth condition, control the bypass branch to be cut off.

[0105] The operating parameters also include the indoor ambient temperature. If the operating parameters meet the fourth condition, the bypass branch is controlled to be turned off so that the fixed-frequency air conditioner resumes its normal operating mode. If the operating parameters do not meet the fourth condition, the bypass branch is kept conducting. The fourth condition includes at least one of the following: after the bypass branch is conducted, the change in the outdoor heat exchanger outlet temperature is greater than the tenth set value; the conduction time of the bypass branch is greater than the third time threshold; the difference between the outdoor heat exchanger outlet temperature and the indoor ambient temperature is greater than the eleventh set value. When the operating parameters meet the third condition, the bypass branch is conducted. Therefore, judging that the conduction time of the bypass branch is greater than the third time threshold also means that the time for reducing the operating load of the fixed-frequency air conditioner is too long, and then the bypass branch is turned off; or judging that after the bypass branch is conducted, the change rate of the outdoor heat exchanger outlet temperature is greater than the tenth set value, that is, the outdoor heat exchanger outlet temperature is affected after the bypass branch is conducted, and then the bypass branch is turned off; or the difference between the outdoor heat exchanger and the indoor ambient temperature is greater than the set value, that is, it means that the heating effect of the outdoor heat exchanger is affected after controlling the bypass branch to conduct, resulting in the indoor ambient temperature not rising rapidly, and it is necessary to control the bypass branch to be turned off so that the fixed-frequency air conditioner resumes normal operation. Therefore, according to whether the operating parameters meet the fourth condition to control the bypass branch to be turned off, the fixed-frequency air conditioner resumes normal operation, so the operation for the fixed-frequency air conditioner to resume normal operation is simple.

[0106] Specifically, referring to Figure 2 , let the difference between the outdoor heat exchanger outlet temperature and the indoor ambient temperature be △Tc, the change rate of the outdoor heat exchanger outlet temperature be △T3, the tenth set value be Z10, the eleventh set value be Z11, the third time threshold be T3, and the conduction time of the bypass branch 260 be t. Therefore, when it is further judged that any one or more of the fourth conditions are met: △T3>Z10; △Tc>Z11; t>T3, the first solenoid valve K1 is controlled to close. After the first solenoid valve K1 is closed, the high-temperature exhaust gas of the compressor 210 only passes through the indoor heat exchanger 250, the throttling device 240, and the outdoor heat exchanger 230 and then returns to the compressor 210, and there will not be another path that returns to the compressor 210 after passing through the first solenoid valve K1, then the fixed-frequency air conditioner 200 resumes normal operation.

[0107] In some embodiments, referring to Figure 13 , the operation control method further includes:

[0108] S390: If the conduction times of the bypass branch reach the twelfth set value, the bypass branch is prohibited from conducting again.

[0109] When the operating parameters meet the third condition, the bypass branch is turned on, and when the operating parameters meet the fourth condition, the bypass branch is controlled to be turned off. Therefore, after determining that the operating parameters meet the third condition or the fourth condition, the bypass branch starts and stops. So, record the number of times the bypass branch is turned on. If the number of times the bypass branch is turned on reaches the twelfth set value, then no longer control the bypass branch to be turned on to control the bypass branch to remain off. Since the frequent turning on and off of the bypass branch will affect the normal operation of the fixed-frequency air conditioner, after determining that the number of times the bypass branch is turned on exceeds the twelfth set value, control the bypass branch to remain off so that the fixed-frequency air conditioner operates normally.

[0110] Specifically, referring to Figure 2 , let the twelfth set value be Z12, the fifteenth set value be Z15, and the number of times the bypass branch 260 is turned on be m. Since controlling the bypass branch 260 to be turned on or off frequently will affect the normal heating effect of the fixed-frequency air conditioner 200, after m reaches the twelfth set value Z12, control the first solenoid valve K1 to remain in the closed state, and the first solenoid valve K1 no longer starts until the fixed-frequency air conditioner 200 stops after entering the next heating defrost cycle. Record the number of times the bypass branch 260 is turned on and recalculate. So, each time the number of times the bypass branch 260 is turned on is judged only for the process of the fixed-frequency air conditioner 200 starting and running. If it is restarted, then recalculate the number of times the bypass branch 260 is turned on to slow down the frequent shutdown of the fixed-frequency air conditioner 200 and not affect the stable operation of the fixed-frequency air conditioner 200. When the first solenoid valve K1 remains off, continue to detect the temperature at the outlet of the outdoor heat exchanger. If the temperature T3 at the outlet of the outdoor heat exchanger is less than the fifteenth set value Z15, then the fixed-frequency air conditioner 200 needs to enter the heating defrost cycle. So, the compressor 210, the outdoor heat exchanger 230, and the indoor heat exchanger 250 stop, and after a period of time, the four-way valve 220 loses power and the compressor 210 is turned on. The compressor 210 performs the defrosting operation. After the defrosting is completed, the compressor 210 is turned off. After a period of time, the four-way valve 220 is powered on and then switched to open the compressor 210 again to enter the normal heating state. Therefore, through the start and stop operations of the compressor 210, the outdoor heat exchanger 230, the indoor heat exchanger 250, and the four-way valve 220, heating defrosting is performed. So, after slowing down the frequent start of the fixed-frequency air conditioner 200, it does not affect the normal heating defrost function of the fixed-frequency air conditioner 200.

[0111] In some embodiments, referring to Figure 14 , the operation control method further includes:

[0112] S400. When the change rate of the operating voltage of the air conditioner is less than the thirteenth set value, control the bypass branch and the flow regulation branch to be turned off.

[0113] Since the power supply of the fixed-frequency air conditioner is a generator, it is necessary to determine whether the operating voltage of the fixed-frequency air conditioner during operation will affect the normal operation of the generator. Therefore, by determining that the change rate of the air conditioner operating voltage is less than the thirteenth set value, it indicates that the fixed-frequency air conditioner will not affect the normal operation of the generator in the normal operation mode. So there is no need to control the flow regulating branch and the bypass branch to be shut off, so that the fixed-frequency air conditioner can continue to operate stably. If the air conditioner operating voltage is greater than the thirteenth set value, it means that the fixed-frequency air conditioner will affect the normal operation of the generator in the normal operation mode. So it is necessary to further determine whether the operating parameters meet the preset conditions. If the operating parameters meet the preset conditions, it is necessary to control the flow regulating branch and the bypass branch to adjust the operating load of the fixed-frequency air conditioner to alleviate the frequent start and stop of the fixed-frequency air conditioner, so that the generator can operate stably.

[0114] Specifically, referring to Figure 2 , let the thirteenth set value be Z13 and the change rate of the air conditioner operating voltage be △U. If △U < Z13, then control the first solenoid valve K1 and the second solenoid valve K2 to close to control the flow regulating branch 270 and the bypass branch 260 to be shut off, then the fixed-frequency air conditioner 200 operates normally, making the control of the shut-off and conduction of the flow regulating branch 270 and the bypass branch 260 simple.

[0115] The various technical features in the above embodiments can be combined arbitrarily as long as there is no conflict or contradiction between the features. However, due to space limitations, they are not described one by one. Therefore, any combination of the various technical features in the above embodiments also belongs to the scope disclosed in this specification.

[0116] In a second aspect, referring to Figure 1 , based on the above operation control method of the fixed-frequency air conditioner, another embodiment of the present application provides an operation control device, including at least one memory and at least one processor for controlling the communication connection of the memory; the memory stores instructions executable by at least one control processor, and the instructions are executed by at least one controller processor so that at least one control processor can execute the operation control method of the fixed-frequency air conditioner as in the first aspect.

[0117] In a third aspect, based on the above operation control device, another embodiment of the present application further provides a fixed-frequency air conditioner, including the operation control device in the second aspect.

[0118] Secondly, it can be understood that the fixed-frequency air conditioner in the embodiment of the present application further includes an indoor heat exchanger 250, a compressor 210, a four-way valve 220, an outdoor heat exchanger 230 and a throttling device 240, and the connection relationship of the indoor heat exchanger 250, the compressor 210, the four-way valve 220, the outdoor heat exchanger 230 and the throttling device 240 refers to Figure 2, it further includes a bypass branch 260 connecting the compressor 210 and the outdoor heat exchanger 230, and a flow regulation branch 270 connecting to the throttling device 240.

[0119] Referring to Figure 2 , a first solenoid valve K1 is provided on the bypass branch 260, and a second solenoid valve K2 and a capillary tube are provided on the flow regulation branch 270, and the second solenoid valve K2 and the capillary tube are connected in series. One end of the compressor 210 is connected to one end of the first solenoid valve K1 and the first end of the four-way valve 220, and the other end is connected to the second end of the four-way valve 220. The other end of the first solenoid valve K1 is connected to the outdoor heat exchanger 230, the second solenoid valve K2, and the throttling device 240. The third end of the four-way valve 220 is connected to the outdoor heat exchanger 230, and the fourth end is connected to one end of the indoor heat exchanger 250. The other end of the indoor heat exchanger 250 is connected to the capillary tube and the throttling device 240. After determining whether the operating parameters meet the preset conditions, the first solenoid valve K1 and the second solenoid valve K2 are controlled to control the flow regulation branch 270 and the bypass branch 260, so as to adjust the operating load of the fixed-frequency air conditioner 200. Therefore, only by adding the first solenoid valve K1 and the second solenoid valve K2 can the phenomenon of frequent start and stop of the fixed-frequency air conditioner 200 be alleviated, which is not only cost-friendly, but also can relieve the frequent start and stop of the air conditioner 200, thereby improving the user experience during use.

[0120] Referring to Figure 3 , the flow regulation branch 270 is connected in parallel to the throttling device 240 and the indoor heat exchanger 250. Among them, the flow regulation branch 270 includes the second solenoid valve K2 and a capillary tube. One end of the second solenoid valve K2 is connected to the throttling device 240 and the bypass branch 260, and the other end is connected between the indoor heat exchanger 250 and the four-way valve 220. Therefore, by controlling the on or off of the flow regulation branch 270, the current of the throttling device 240 and the indoor heat exchanger 250 is adjusted, so as to adjust the operating load of the fixed-frequency air conditioner 200.

[0121] Among them, the air conditioner is powered by a generator, and the frequent start and stop of the air conditioner will affect the normal operation of the generator, thereby affecting the normal operation of other household appliances connected to the generator. Therefore, the frequent start and stop of the air conditioner is alleviated to ensure the stable operation of the generator.

[0122] It should be noted that if it is necessary to obtain the indoor ambient temperature, outdoor ambient temperature, indoor unit evaporator coil temperature, outdoor unit condenser coil temperature, compressor exhaust temperature, or compressor surface temperature, temperature sensors can be set at corresponding places.

[0123] In a fourth aspect, another embodiment of the present application further provides a computer-readable storage medium storing computer-executable instructions for causing a computer to execute the operation control method of the fixed-frequency air conditioner in the first aspect as described above.

[0124] Those of ordinary skill in the art will understand that all or some of the steps and systems disclosed in the methods above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

[0125] The embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the above embodiments. Various changes can be made without departing from the spirit of the present application within the knowledge of those of ordinary skill in the art. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A running control method for a fixed-frequency air conditioner, characterized in that, The fixed-frequency air conditioner is powered by a generator. The fixed-frequency air conditioner includes a compressor, a four-way valve, an indoor heat exchanger, a throttling device, and an outdoor heat exchanger that are sequentially connected through pipelines. It further includes a bypass branch connecting the compressor and the outdoor heat exchanger, and a flow rate adjustment branch connected to the throttling device. The operation control method includes: In the heating mode, obtain the operation parameters of the fixed-frequency air conditioner. The operation parameters include the air conditioner operation current, the air conditioner operation voltage, the maximum operation current during the heating defrost cycle, and the outdoor heat exchanger outlet temperature. Judge whether the operation parameters meet the preset conditions according to the operation parameters. The preset conditions include a first condition and a third condition. The first condition is that the rising rate of the air conditioner operation current is greater than a first set value and the duration is greater than a first time threshold, or the falling rate of the air conditioner operation voltage is greater than a second set value and the duration is greater than a second time threshold. The third condition is that the maximum operation current during the heating defrost cycle is greater than a first set ratio multiplied by the generator rated current and the outdoor heat exchanger outlet temperature is less than an eighth set value, or the change rate of the output voltage of the generator is greater than a ninth set value and the heat exchanger outlet temperature is less than an eighth set value. If the operation parameters meet the preset conditions, control the bypass branch or the flow rate adjustment branch to adjust the operation load of the fixed-frequency air conditioner. Among them, if the operation parameters meet the first condition, control the flow rate adjustment branch to conduct. If the operation parameters meet the third condition, control the bypass branch to conduct. If the change rate of the air conditioner operation voltage is less than a thirteenth set value, control the bypass branch and the flow rate adjustment branch to turn off.

2. The operation control method according to claim 1, wherein It further includes: If the rising rate of the air conditioner operation current is less than a third set value or the falling rate of the air conditioner operation voltage is less than a fourth set value, control the flow rate adjustment branch to turn off, where the third set value is less than the first set value and the fourth set value is less than the second set value.

3. The operating control method according to claim 1, characterized in that The operation parameters include the air outlet temperature, the indoor environment temperature, and the temperature compensation for reaching the set temperature and stopping. The preset conditions include a second condition. The second condition is that the air outlet temperature is less than the sum of the indoor environment temperature, the temperature compensation for reaching the set temperature and stopping, and a fifth set value. If the operation parameters meet the second condition, control the flow rate adjustment branch to conduct.

4. The operating control method according to claim 3, characterized in that It further includes: If the air outlet temperature is greater than the sum of the indoor environment temperature, the temperature compensation for reaching the set temperature and stopping, the fifth set value, and a sixth set value, control the flow rate adjustment branch to turn off.

5. The operating control method according to claim 4, wherein It further includes: Record the conduction times of the flow rate adjustment branch. If the conduction times reach a seventh set value, prohibit the flow rate adjustment branch from conducting again.

6. The operating control method according to claim 5, wherein, It further includes: If the fixed-frequency air conditioner restarts, clear the conduction times.

7. The operating control method according to claim 1, wherein The operation parameters further include the indoor environment temperature. If the operation parameters meet the fourth condition, control the bypass branch to turn off. The fourth condition includes any one or more of the following: After the bypass branch conducts, the change rate of the outdoor heat exchanger outlet temperature is greater than a tenth set value; The difference between the outlet temperature of the outdoor heat exchanger and the indoor ambient temperature is greater than the eleventh set value; The conduction time of the bypass branch is greater than the third time threshold.

8. The operation control method according to claim 7, characterized in that It further includes: If the conduction times of the bypass branch reach the twelfth set value, the bypass branch is prohibited from conducting again.

9. An operation control device, characterized in that, It includes at least one control processor and a memory for communicatively connecting with the at least one control processor; the memory stores instructions executable by the at least one control processor, and the instructions are executed by the at least one controller processor so that the at least one control processor can execute the operation control method of the fixed-frequency air conditioner according to any one of claims 1 to 8.

10. A fixed-frequency air conditioner, characterized in that, It includes the operation control device according to claim 9.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to cause a computer to execute the operation control method of the fixed-frequency air conditioner according to any one of claims 1 to 8.

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