Rotating speed control method of air conditioner outer fan, controller, air conditioner and energy storage system

Abstract

The embodiment of the invention relates to the technical field of air conditioner control, and discloses a rotating speed control method of an air conditioner outer fan, a controller, an air conditioner and an energy storage system. Then, the exhaust pressure value, the environment temperature value and the condensation temperature value of the air conditioner are collected, and the rotating speed of an outer fan of the air conditioner is controlled based on the abnormal conditions of the exhaust pressure value, the environment temperature value and / or the condensation temperature value; according to the rotating speed control method provided by the embodiment of the invention, the rotating speed of the air conditioner outer fan can be adjusted based on different pressures and temperatures in the air conditioner, the method can adapt to various different complex scenes, and it is ensured that the air conditioner outer fan can operate in an accurate and stable state under most conditions.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of air conditioning control, and in particular to a speed control method of an air conditioner outdoor fan, a controller, an air conditioner, and an energy storage system. Background Art

[0002] An air conditioner is a device that can lower or maintain the temperature of a certain space indoors. It is widely used in the thermal management of energy storage systems. A logic that can accurately control the speed of the air conditioner's outdoor fan with high stability is very important.

[0003] At present, the exhaust pressure is usually used in the control logic of the air conditioner outdoor fan to control the speed of the outdoor fan. When the sensor accuracy is high enough, it can usually meet the requirements of control accuracy and stability. However, for complex environments or scenarios where energy storage systems such as energy storage cabinets are located, if a system component fails, it usually takes a long time for a dedicated person to handle the failure. The current air conditioner outdoor fan control logic is relatively simple and cannot maintain high-precision and high-stability operation in various complex environments, which may affect the functional realization of the energy storage system. Summary of the invention

[0004] The embodiments of the present application provide a speed control method for an air conditioner outdoor fan, a controller, an air conditioner, and an energy storage system.

[0005] The purpose of the embodiment of the present invention is achieved through the following technical solutions:

[0006] To solve the above technical problems, in the first aspect, an embodiment of the present invention provides a method for controlling the speed of an air-conditioning outdoor fan, comprising: after the air-conditioning starts cooling, controlling the air-conditioning outdoor fan to start at a preset minimum speed; collecting the exhaust pressure value, ambient temperature value, and condensing temperature value of the air-conditioning; and controlling the speed of the air-conditioning outdoor fan based on abnormal conditions of the exhaust pressure value, the ambient temperature value and / or the condensing temperature value.

[0007] In some embodiments, the control of the rotation speed of the air-conditioning outdoor fan based on the abnormal conditions of the exhaust pressure value, the ambient temperature value and / or the condensing temperature value includes: if the exhaust pressure value is normal, adjusting the rotation speed of the air-conditioning outdoor fan according to the exhaust pressure value; if the exhaust pressure value is abnormal, the ambient temperature value is normal, and the condensing temperature value is abnormal, adjusting the rotation speed of the air-conditioning outdoor fan according to the ambient temperature; if the exhaust pressure value is abnormal, the ambient temperature value is normal, and the condensing temperature value is normal, adjusting the rotation speed of the air-conditioning outdoor fan according to the ambient temperature and the condensing temperature; if the exhaust pressure value is abnormal, the ambient temperature value is abnormal, and the condensing temperature value is abnormal, adjusting the rotation speed of the air-conditioning outdoor fan according to the exhaust temperature; if the exhaust pressure value is abnormal, the ambient temperature value is abnormal, and the condensing temperature value is abnormal, adjusting the rotation speed of the air-conditioning outdoor fan according to the condensing temperature.

[0008] In some embodiments, adjusting the speed of the air-conditioning outdoor fan according to the exhaust pressure value includes: obtaining a minimum exhaust pressure threshold of the air-conditioning outdoor fan at the lowest speed, and a maximum exhaust pressure threshold of the air-conditioning outdoor fan at the highest speed; and determining a speed adjustment method for the air-conditioning outdoor fan based on a size relationship between the exhaust pressure value and the minimum exhaust pressure threshold and the maximum exhaust pressure threshold.

[0009] In some embodiments, the speed adjustment method of the air conditioner outdoor fan is determined based on the size relationship between the exhaust pressure value and the exhaust pressure minimum threshold and the exhaust pressure maximum threshold, including: when the exhaust pressure value is greater than the exhaust pressure minimum threshold and less than the exhaust pressure maximum threshold, the speed of the air conditioner outdoor fan is kept unchanged; when the exhaust pressure value is less than or equal to the exhaust pressure minimum threshold, or the exhaust pressure value is greater than or equal to the exhaust pressure maximum threshold, the speed of the air conditioner outdoor fan is adjusted based on the following formula:

[0010] △f*(Pdi-Pfmin) / (Pfmax-Pfmin)

[0011] Among them, Δf is the difference between the maximum speed and the minimum speed of the air-conditioning outdoor fan, Pdi is the exhaust pressure value, Pfmin is the minimum threshold of the exhaust pressure, and Pfmax is the maximum threshold of the exhaust pressure.

[0012] In some embodiments, adjusting the speed of the air-conditioning outdoor fan according to the ambient temperature includes: after the air-conditioning compressor is started and the ambient temperature is higher than a first preset temperature, adjusting the speed of the air-conditioning outdoor fan to a maximum speed; when the ambient temperature is lower than the first preset temperature and higher than a second preset temperature, adjusting the speed of the air-conditioning outdoor fan to a first speed; when the ambient temperature is lower than the second preset temperature and higher than a third preset temperature, adjusting the speed of the air-conditioning outdoor fan to a second speed; when the ambient temperature is lower than the third preset temperature, adjusting the speed of the air-conditioning outdoor fan to zero; after the air-conditioning compressor is turned off, delaying the shutdown of the air-conditioning outdoor fan; wherein, the second speed is slower than the first speed, the second preset temperature is lower than the first preset temperature, and the third preset temperature is lower than the second preset temperature.

[0013] In some embodiments, adjusting the rotational speed of the air-conditioning outdoor fan according to the ambient temperature and the condensing temperature includes: adjusting the rotational speed of the air-conditioning outdoor fan according to the size of the ambient temperature value within a preset time of starting the air-conditioning outdoor fan, wherein the size of the ambient temperature value is positively correlated with the rotational speed of the air-conditioning outdoor fan; after the start-up time of the air-conditioning outdoor fan, adjusting the rotational speed of the air-conditioning outdoor fan according to the size relationship between the condensing temperature and the start-up temperature threshold of the air-conditioning outdoor fan, wherein when the condensing temperature is lower than the start-up temperature threshold of the air-conditioning outdoor fan, the rotational speed of the air-conditioning outdoor fan is reduced, and when the condensing temperature is higher than the start-up temperature threshold of the air-conditioning outdoor fan and there is a preset temperature difference, the rotational speed of the air-conditioning outdoor fan is increased.

[0014] In some embodiments, adjusting the speed of the air-conditioning outdoor fan according to the exhaust temperature includes: collecting the exhaust temperature of the air-conditioning outdoor fan after the air-conditioning compressor is started; when the exhaust temperature is lower than a fourth preset temperature, adjusting the speed of the air-conditioning outdoor fan to zero; when the exhaust temperature is higher than the fourth preset temperature and lower than the fifth preset temperature, adjusting the speed of the air-conditioning outdoor fan to a third speed; when the exhaust temperature is higher than the fifth preset temperature, adjusting the speed of the air-conditioning outdoor fan to a maximum speed; and after the air-conditioning compressor is turned off, delaying the shutdown of the air-conditioning outdoor fan.

[0015] In some embodiments, adjusting the speed of the air-conditioning outdoor fan according to the condensing temperature includes: after the air-conditioning compressor is started, and when the condensing temperature is greater than the sum of the starting temperature threshold of the air-conditioning outdoor fan and the condensing temperature difference, adjusting the speed of the air-conditioning outdoor fan to the maximum speed; after the air-conditioning compressor is turned off, or when the condensing temperature is less than or equal to the starting temperature threshold of the air-conditioning outdoor fan, delaying the shutdown of the air-conditioning outdoor fan.

[0016] To solve the above technical problems, in a second aspect, an embodiment of the present invention provides a controller, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method described in the first aspect above.

[0017] To solve the above technical problems, in a third aspect, an embodiment of the present invention provides an air conditioner, comprising: an external fan, a compressor, a temperature sensor, a pressure sensor, and the controller described in the second aspect, wherein the controller is communicatively connected to the external fan, the compressor, the temperature sensor, and the pressure sensor, respectively.

[0018] To solve the above technical problems, in a fourth aspect, an embodiment of the present invention provides an energy storage system, including: the air conditioner as described in the third aspect.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: different from the prior art, an embodiment of the present invention provides a speed control method, a controller, an air conditioner and an energy storage system for an air-conditioning outdoor fan. The speed control method can control the air-conditioning outdoor fan to start at a preset minimum speed after the air-conditioning starts cooling, and then collect the exhaust pressure value, the ambient temperature value, and the condensing temperature value of the air-conditioning, and control the speed of the air-conditioning outdoor fan based on abnormal conditions of the exhaust pressure value, the ambient temperature value and / or the condensing temperature value. The speed control method provided in the embodiment of the present invention can adjust the speed of the air-conditioning outdoor fan based on different pressures and temperatures in the air-conditioning, can adapt to various different complex scenarios, and ensure that the air-conditioning outdoor fan can operate in a precise and stable state in most cases. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements / modules and steps with the same reference numerals in the drawings are represented as similar elements / modules and steps. Unless otherwise specified, the figures in the drawings do not constitute proportional limitations.

[0021] Figure 1 It is a flow chart of a method for controlling the speed of an air conditioner outdoor fan provided in the first embodiment of the present invention;

[0022] Figure 2 yes Figure 1 A schematic diagram of a first sub-flow chart of step S300 in the speed control method shown;

[0023] Figure 3 yes Figure 1A second sub-flow diagram of step S300 in the speed control method shown;

[0024] Figure 4 yes Figure 1 A third sub-flow diagram of step S300 in the speed control method shown;

[0025] Figure 5 yes Figure 1 A fourth sub-flow diagram of step S300 in the speed control method is shown;

[0026] Figure 6 yes Figure 1 A fifth sub-flow diagram of step S300 in the speed control method shown;

[0027] Figure 7 is a schematic diagram of the hardware structure of a controller provided in Embodiment 2 of the present invention;

[0028] Figure 8 This is a structural block diagram of an air conditioner provided by Embodiment 3 of the present invention;

[0029] Fig. 9 It is a structural block diagram of an energy storage system provided in Embodiment 4 of the present invention. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0031] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] It should be noted that, if there is no conflict, the various features in the embodiments of the present invention can be combined with each other, all within the scope of protection of the present application. In addition, although the functional module division is performed in the device schematic diagram and the logical order is shown in the flow chart, in some cases, it may be different from the module division in the device, or the steps shown or described in the order of execution in the flow chart. In addition, the words "first", "second", "third" and the like used herein do not limit the data and the execution order, but only distinguish the same items or similar items with basically the same functions and effects. When an element is described as "connected" to another element, it can be directly connected to another element, or there can be one or more centered elements therebetween.

[0033] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0034] In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] In order to solve the problem that the current control logic of the air-conditioning outdoor fan is simple and cannot adapt to complex environments and deal with different emergencies, the embodiments of the present invention provide a speed control method, controller, air conditioner and energy storage system for the air-conditioning outdoor fan. The speed control method adds a backup control logic to the air-conditioning outdoor fan, and can adjust the speed of the air-conditioning outdoor fan based on different pressures and temperatures in the air conditioner. It can adapt to various different complex scenarios and ensure that the air-conditioning outdoor fan can operate in a precise and stable state in most cases.

[0036] Specifically, the embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0037] Embodiment 1

[0038] The embodiment of the present invention provides a method for controlling the speed of an air conditioner outdoor fan. Figure 1 , which shows the process of a method for controlling the speed of an air conditioner outdoor fan provided by an embodiment of the present invention, the method includes but is not limited to the following steps:

[0039] Step S100: After the air conditioner starts cooling, the air conditioner outdoor fan is controlled to start at a preset minimum speed;

[0040] In an embodiment of the present invention, first, when the air conditioner starts to cool, since the air conditioner needs to exchange less heat energy to the outside through the external fan at this time, the air conditioner external fan can be controlled to start and rotate at the lowest speed, and then various sensors can be used to detect various values ​​in real time to further determine whether it is necessary to adjust the speed of the air conditioner external fan and the specific adjustment situation.

[0041] Step S200: collecting the exhaust pressure value, ambient temperature value, and condensing temperature value of the air conditioner;

[0042] In an embodiment of the present invention, various temperature sensors are added to detect various temperature states of the air conditioner, and then different solutions for controlling the rotation speed of the air conditioner outdoor fan are provided in combination with the pressure value collected by the pressure sensor. Among them, the exhaust pressure value of the air conditioner can be collected by setting an exhaust pressure sensor at the exhaust pipe or the exhaust port, the ambient temperature value can be collected by setting an ambient temperature sensor in the environment, and the condensation temperature value can be collected by setting a condensation temperature sensor on the condenser. Furthermore, an exhaust temperature sensor can also be set at the exhaust pipe or the exhaust port to collect the exhaust temperature. In addition, various temperature sensors can use thermistors set in circuit modules or circuit boards, such as positive temperature coefficient thermistors (Positive Temperature Coefficient thermistor, PTC) or negative temperature coefficient thermistors (Negative Temperature Coefficient thermistor, NTC) to realize temperature collection, and when the thermistor is short-circuited or open-circuited, it can be judged as an abnormality or failure.

[0043] Step S300: Based on the abnormal conditions of the exhaust pressure value, the ambient temperature value and / or the condensing temperature value, the rotation speed of the air conditioner outdoor fan is controlled.

[0044] In an embodiment of the present invention, a corresponding control scheme can be switched based on the abnormal values ​​detected by various temperature sensors and pressure sensors, and the speed of the air conditioner outdoor fan can be adjusted accordingly through control schemes such as corresponding conversion formulas, wherein the speed of the air conditioner outdoor fan is controlled based on the abnormal conditions of the exhaust pressure value, the ambient temperature value and / or the condensing temperature value, specifically including the following five situations, and for the following five situations, the speed of the air conditioner outdoor fan is adjusted respectively through five control schemes:

[0045] Case 1: if the exhaust pressure value is normal, the speed of the air conditioner outdoor fan is adjusted according to the exhaust pressure value;

[0046] In the embodiment of the present invention, if the exhaust pressure value detected by the exhaust pressure sensor is normal, it means that the current air conditioner outdoor fan speed is suitable and there is no need to adjust the air conditioner outdoor fan speed; if the exhaust pressure value is abnormal, it is necessary to further combine the temperature value collected by the temperature sensor for judgment. Among them, judging whether the exhaust pressure value is abnormal can be judged based on whether the exhaust pressure value is within a certain range. For details, please refer to Figure 2 , which shows Figure 1 The first sub-process of step S300 in the speed control method shown, wherein the speed of the air conditioner outdoor fan is adjusted according to the exhaust pressure value, comprises:

[0047] Step S311: obtaining a minimum threshold of exhaust pressure of the air conditioner outdoor fan at the lowest speed and a maximum threshold of exhaust pressure of the air conditioner outdoor fan at the highest speed;

[0048] In the embodiment of the present invention, it is necessary to first obtain the exhaust pressure value collected by the exhaust pressure sensor when the air conditioner outdoor fan is working at the lowest speed as the exhaust pressure minimum threshold value Pfmin, and it is also necessary to obtain the exhaust pressure value collected by the exhaust pressure sensor when the air conditioner outdoor fan is working at the highest speed as the exhaust pressure maximum threshold value Pfmax. Alternatively, the exhaust pressure minimum threshold value Pfmin and the exhaust pressure maximum threshold value Pfmax may also be parameters pre-stored in the memory or storage medium of the air conditioner, and retrieved when it is necessary to control the speed of the air conditioner outdoor fan.

[0049] Step S312: Determine the speed adjustment method of the air conditioner outdoor fan based on the relationship between the exhaust pressure value and the exhaust pressure minimum threshold and the exhaust pressure maximum threshold.

[0050] In an embodiment of the present invention, whether the speed of the air-conditioning outdoor fan needs to be adjusted and the adjustment method can be determined according to whether the exhaust pressure value is within the range defined by the exhaust pressure minimum threshold value Pfmin and the exhaust pressure maximum threshold value Pfmax, that is, no adjustment is required when it is within the range, and adjustment is required when it is not within the range. Specifically, the speed adjustment method of the air-conditioning outdoor fan is determined based on the size relationship between the exhaust pressure value and the exhaust pressure minimum threshold value and the exhaust pressure maximum threshold value, including: when the exhaust pressure value Pdi is greater than the exhaust pressure minimum threshold value Pfmin and less than the exhaust pressure maximum threshold value Pfmax, that is, Pfmin<Pdi<Pfmax, the speed of the air-conditioning outdoor fan is kept unchanged; when the exhaust pressure value Pdi is less than or equal to the exhaust pressure minimum threshold value Pfmin, that is, Pdi≤Pfmin, or when the exhaust pressure value Pdi is greater than or equal to the exhaust pressure maximum threshold value Pfmax, that is, Pdi≥Pfmax, the speed of the air-conditioning outdoor fan is adjusted based on the following formula:

[0051] △f*(Pdi-Pfmin) / (Pfmax-Pfmin)

[0052] Among them, Δf is the difference between the maximum speed and the minimum speed of the air-conditioning outdoor fan, Pdi is the exhaust pressure value, Pfmin is the minimum threshold of the exhaust pressure, and Pfmax is the maximum threshold of the exhaust pressure.

[0053] Case 2: If the exhaust pressure value is abnormal, the ambient temperature value is normal, and the condensing temperature value is abnormal, the speed of the air conditioner outdoor fan is adjusted according to the ambient temperature;

[0054] In the embodiment of the present invention, if the exhaust pressure value is abnormal, it is necessary to further determine the speed adjustment scheme of the air conditioner outdoor unit based on the ambient temperature and condensing temperature detected by the temperature sensor. Specifically, for the case where the exhaust pressure value is abnormal, the ambient temperature value is normal, and the condensing temperature value is abnormal, please refer to Figure 3 , which shows Figure 1 The second sub-process of step S300 in the speed control method, wherein the speed of the air conditioner outdoor fan is adjusted according to the ambient temperature, comprises:

[0055] Step S321: after the air-conditioning compressor is started, and when the ambient temperature Tai is higher than the first preset temperature T1, the speed of the air-conditioning outdoor fan is adjusted to the maximum speed;

[0056] Step S322: when the ambient temperature Tai is lower than the first preset temperature T1 and higher than the second preset temperature T2, adjusting the speed of the air conditioner outdoor fan to the first speed S1;

[0057] Step S323: when the ambient temperature Tai is lower than the second preset temperature T2 and higher than the third preset temperature T3, adjusting the speed of the air conditioner outdoor fan to the second speed S2;

[0058] Step S324: when the ambient temperature Tai is lower than the third preset temperature T3, adjusting the speed of the air conditioner outdoor fan to zero;

[0059] Step S325: after the air-conditioning compressor is turned off, the air-conditioning outdoor fan is turned off with a delay;

[0060] The second rotation speed S2 is slower than the first rotation speed S1 , the second preset temperature T2 is lower than the first preset temperature T1 , and the third preset temperature T3 is lower than the second preset temperature T2 .

[0061] In the embodiment of the present invention, when the exhaust pressure value is abnormal, the ambient temperature value is normal, and the condensing temperature value is abnormal, and after the air-conditioning compressor is started, the speed adjustment value of the air-conditioning outdoor fan can be set in a step-by-step manner based on different ambient temperatures Tai to achieve speed adjustment of the air-conditioning outdoor fan under different ambient temperatures Tai. And after the air-conditioning compressor is turned off, the air-conditioning outdoor fan is turned off with a delay to save energy.

[0062] For example, take the first preset temperature T1 as 20°C, the second preset temperature T2 as -5°C, and the third preset temperature T3 as -20°C, and take the first speed S1 as 40% of the maximum speed of the air conditioner outdoor fan, and the second speed S2 as 30% of the maximum speed of the air conditioner outdoor fan as an example: when the ambient temperature Tai ≥ 20°C, the outdoor fan is fixed to the maximum speed, that is, 100% of the maximum speed; when -5°C ≤ Tai < 20°C, the outdoor fan outputs at 40% of the maximum speed; when -20°C ≤ Tai < -5°C, the outdoor fan outputs at a low speed of 30% of the maximum speed; when Tai < -20°C, it outputs at 0% of the maximum speed, that is, at the lowest speed. When the compressor is turned off, the outdoor fan is configured to be turned off with a delay of 5s. Among them, the setting of the preset temperature under each step and the setting of the corresponding speed, as well as the setting of the delay time, can be adjusted according to actual needs, without being restricted to the limitations of the embodiments of the present invention.

[0063] Case 3: If the exhaust pressure value is abnormal, the ambient temperature value is normal, and the condensing temperature value is normal, the speed of the air conditioner outdoor fan is adjusted according to the ambient temperature and the condensing temperature;

[0064] In the embodiment of the present invention, when the exhaust pressure value is abnormal, but the ambient temperature value and the condensing temperature value are normal, it is necessary to further adjust the speed of the air conditioner outdoor fan in combination with the ambient temperature and the condensing temperature in combination with the working state of the air conditioner outdoor fan. Figure 4 , which shows Figure 1 The third sub-process of step S300 in the speed control method, wherein the speed of the air conditioner outdoor fan is adjusted according to the ambient temperature and the condensing temperature, comprises:

[0065] Step S331: within the preset time when the air conditioner outdoor fan is started, adjusting the speed of the air conditioner outdoor fan according to the size of the ambient temperature value Tai, wherein the size of the ambient temperature value Tai is positively correlated with the speed of the air conditioner outdoor fan;

[0066] Step S332: After the start-up time of the air-conditioning outdoor fan, adjust the speed of the air-conditioning outdoor fan according to the relationship between the condensing temperature Tli and the start-up temperature threshold Tcsf of the air-conditioning outdoor fan; wherein, when the condensing temperature Tli is lower than the start-up temperature threshold Tcsf of the air-conditioning outdoor fan, reduce the speed of the air-conditioning outdoor fan; when the condensing temperature Tli is higher than the start-up temperature threshold Tcsf of the air-conditioning outdoor fan and there is a preset temperature difference, increase the speed of the air-conditioning outdoor fan.

[0067] In an embodiment of the present invention, within a preset time of starting the air-conditioning outdoor fan, for example, within five seconds, the rotation speed of the air-conditioning outdoor fan must be controlled based on the ambient temperature Tai, wherein the method of controlling the rotation speed of the air-conditioning outdoor fan based on the ambient temperature Tai can be the same as the method in Case 2, or the rotation speed of the air-conditioning outdoor fan can be adjusted based on a step-by-step temperature, and the details can be referred to the above steps S321 to S325.

[0068] Among them, the temperature gradient and the corresponding speed set in case 2 can also be distinguished. For example, when the ambient temperature Tai ≥ 15°C, the external fan is fixed at the maximum speed, that is, 100% of the maximum speed; when 15°C>Tai≥0°C, the external fan outputs at a medium speed of 65% of the maximum speed; when 0°C>Tai, the external fan starts at a low speed of 30% of the maximum speed.

[0069] Furthermore, after exceeding the preset time for starting the air conditioner outdoor fan, that is, after exceeding five seconds, the speed of the air conditioner outdoor fan needs to be adjusted according to the relationship between the condensing temperature Tli and the start-up temperature threshold Tcsf of the air conditioner outdoor fan. For example, when Tli < Tcsf, the speed of the outdoor fan is reduced by 10%; when Tli > Tcsf+1, the speed of the outdoor fan is increased by 10%.

[0070] Among them, the setting of the preset temperature and the corresponding speed under each step, as well as the setting of the delay time, and the numerical setting of the starting temperature threshold of the air-conditioning outdoor fan can be adjusted according to actual needs without being restricted to the limitations of the embodiments of the present invention.

[0071] Case 4: If the exhaust pressure value, the ambient temperature value, and the condensing temperature value are abnormal, the speed of the air conditioner outdoor fan is adjusted according to the exhaust temperature;

[0072] In the embodiment of the present invention, if the exhaust pressure value, the ambient temperature value, and the condensing temperature value are all abnormal, it is necessary to collect the exhaust temperature and adjust the speed of the air conditioner outdoor fan based on the exhaust temperature. For details, see Figure 5 , which shows Figure 1 The fourth sub-process of step S300 in the speed control method shown in FIG. 1 , wherein the speed of the air conditioner outdoor fan is adjusted according to the exhaust temperature, comprises:

[0073] Step S341: After the air conditioner compressor is started, the exhaust temperature Tdi of the air conditioner outdoor fan is collected;

[0074] Step S342: when the exhaust temperature Tdi is lower than the fourth preset temperature T4, adjusting the speed of the air conditioner outdoor fan to zero;

[0075] Step S343: when the exhaust temperature Tdi is higher than the fourth preset temperature T4 and lower than the fifth preset temperature T5, adjusting the speed of the air conditioner outdoor fan to the third speed S3;

[0076] Step S344: when the exhaust temperature Tdi is higher than the fifth preset temperature T5, adjusting the speed of the air conditioner outdoor fan to the maximum speed;

[0077] Step S345: After the air-conditioning compressor is turned off, the air-conditioning outdoor fan is turned off with a delay.

[0078] In the embodiment of the present invention, for the exhaust temperature Tdi, it is necessary to determine whether the exhaust temperature Tdi is within a certain range, and then the exhaust temperature Tdi and the speed control of the air conditioner outdoor fan are also set in a step-by-step manner. For example, taking the fourth preset temperature T4 as 60°C and the fifth preset temperature T5 as 80°C as an example, and taking the third speed S3 as 40% of the maximum speed of the air conditioner outdoor fan as an example: when the exhaust temperature Tdi is less than 60°C, the outdoor fan is fixed to the lowest speed, that is, 0% of the maximum speed; when 60°C≤Tdi<80°C, the outdoor fan outputs at 40% of the maximum speed; when 80°C≤Tdi, the outdoor fan outputs at the highest speed. When the compressor is turned off, the outdoor fan is configured to be turned off with a delay of 5s. Among them, the setting of the preset temperature under each step and the corresponding speed setting, as well as the setting of the delay time, can be adjusted according to actual needs, without being restricted to the limitations of the embodiment of the present invention.

[0079] Case 5: If the exhaust pressure value is abnormal, the ambient temperature value is abnormal, and the condensing temperature value is normal, the rotation speed of the air conditioner outdoor fan is adjusted according to the condensing temperature.

[0080] In the embodiment of the present invention, if both the exhaust pressure value and the ambient temperature value are abnormal, and only the condensing temperature value is normal, the speed of the air conditioner outdoor fan needs to be adjusted according to the condensing temperature. For details, see Figure 6 , which shows Figure 1 In the fifth sub-process of step S300 in the speed control method, adjusting the speed of the air conditioner outdoor fan according to the condensation temperature includes:

[0081] Step S351: after the air-conditioning compressor is started, and when the condensing temperature Tli is greater than the sum of the starting temperature threshold Tcsf of the air-conditioning outdoor fan and the condensing temperature difference ΔTcs, adjusting the speed of the air-conditioning outdoor fan to the maximum speed;

[0082] Step S352: After the air-conditioning compressor is turned off, or when the condensing temperature Tli is less than or equal to the start-up temperature threshold Tcsf of the air-conditioning outdoor fan, the air-conditioning outdoor fan is turned off with a delay.

[0083] In the embodiment of the present invention, when the compressor of the air conditioner is started, and when Tli>Tcsf+△Tcs, the external fan is turned on, and the speed of the external fan runs at 100% of the maximum speed. When the compressor of the air conditioner is turned off for a delay of 5s or when Tli≤Tcsf, the external fan of the air conditioner needs to be controlled to be turned off.

[0084] Embodiment 2

[0085] The present invention also provides a controller 10, see Figure 7 , which shows that it is possible to execute Figures 1 to 6 The hardware structure of the controller 10 of the speed control method.

[0086] The controller 10 includes: at least one processor 11; and a memory 12 connected to the at least one processor 11 for communication. Figure 7 The memory 12 stores instructions that can be executed by the at least one processor 11, and the instructions are executed by the at least one processor 11 so that the at least one processor 11 can perform the above Figures 1 to 6 The processor 11 and the memory 12 may be connected via a bus or other means. Figure 7 The example of connecting through bus is taken in the following.

[0087] The memory 12 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs and modules, such as program instructions / modules corresponding to the speed control method in the embodiment of the present application. The processor 11 executes various functional applications and data processing of the controller by running the non-volatile software programs, instructions and modules stored in the memory 12, that is, the speed control method in the above method embodiment is realized.

[0088] The memory 12 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required by at least one function; the data storage area may store data created according to the use of the speed control device, etc. In addition, the memory 12 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 12 may optionally include a memory remotely arranged relative to the processor 11, and these remote memories may be connected to the speed control device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0089] The one or more modules are stored in the memory 12, and when executed by the one or more processors 11, execute the speed control method in any of the above method embodiments, for example, execute the above described Figures 1 to 6 method steps.

[0090] The above-mentioned product can execute the method provided in the embodiment of the present application, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in this embodiment, please refer to the method provided in the embodiment of the present application.

[0091] The present application also provides a non-volatile computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed by one or more processors, for example, to execute the above-described Figures 1 to 6 method steps.

[0092] The present application also provides a computer program product, including a computer program stored on a non-volatile computer-readable storage medium, wherein the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the speed control method in any of the above method embodiments, for example, executing the above described Figures 1 to 6 method steps.

[0093] Embodiment 3

[0094] The embodiment of the present invention provides an air conditioner 100, see Figure 8 , which shows a structural block diagram of an air conditioner 100 provided in an embodiment of the present invention, the air conditioner 100 includes: an external fan 110, a compressor 120, a temperature sensor 130, a pressure sensor 140, and the controller 10 described in the second embodiment, and the controller 10 is respectively communicated with the external fan 110, the compressor 120, the temperature sensor 130, and the pressure sensor 140.

[0095] The external fan 110 and the compressor 120 are conventional equipment structures in the air conditioner 100 and will not be described in detail here; the controller 10 is the controller 10 described in Example 2, which can execute the speed control method described in Example 1 of the present invention and will not be described in detail here.

[0096] The temperature sensor 130 at least includes an ambient temperature sensor 131, a condensing temperature sensor 132 and an exhaust temperature sensor 133, wherein the ambient temperature sensor 131 is arranged outside the air conditioner and in the refrigeration environment of the air conditioner 100, the condensing temperature sensor 132 is arranged on the condenser or condensing tube of the air conditioner 100, and the exhaust temperature sensor 133 is arranged at the exhaust pipe or exhaust port of the air conditioner 100. In addition, the temperature sensor 130 can be an electronic component or module that can detect temperature, such as a thermistor.

[0097] The pressure sensor 140 is an exhaust pressure sensor, which is disposed at an exhaust pipe or an exhaust port of the air conditioner 100 and is used to detect the exhaust pressure of the air conditioner 100 .

[0098] Embodiment 4

[0099] The embodiment of the present invention provides an energy storage system 1000, see Fig. 9 , which shows a structural block diagram of an energy storage system 1000 provided in an embodiment of the present invention, and the energy storage system 1000 includes: the air conditioner 100 as described in the third embodiment.

[0100] The air conditioner 100 is the air conditioner 100 described in Example 3, including the controller 10 described in Example 2, and can execute the speed control method of the air conditioner outdoor fan described in Example 1. Please refer to the above embodiment for details, which will not be described in detail here.

[0101] The energy storage system 1000 adopts the speed control method of the air-conditioning outdoor fan provided in the first embodiment of the present invention to control the speed of the air-conditioning outdoor fan. Compared with the existing method of controlling the outdoor fan only by exhaust pressure, it can cover more different situations, and the reliability, control accuracy and stability are all high. The outdoor fan can achieve higher control accuracy during fault operation, reducing the impact of thermal system component failures on the energy storage cabinet.

[0102] In an embodiment of the present invention, a speed control method, a controller, an air conditioner and an energy storage system for an air-conditioning outdoor fan are provided. The speed control method can control the air-conditioning outdoor fan to start at a preset minimum speed after the air-conditioning starts cooling, and then collect the exhaust pressure value, ambient temperature value, and condensing temperature value of the air-conditioning, and control the speed of the air-conditioning outdoor fan based on abnormal conditions of the exhaust pressure value, the ambient temperature value and / or the condensing temperature value. The speed control method provided in an embodiment of the present invention can adjust the speed of the air-conditioning outdoor fan based on different pressures and temperatures in the air-conditioning, can adapt to various different complex scenarios, and ensure that the air-conditioning outdoor fan can operate in a precise and stable state in most cases.

[0103] It should be noted that the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, and may be located in one place or distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0104] Through the description of the above implementation methods, ordinary technicians in this field can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, it can also be implemented by hardware. Ordinary technicians in this field can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling the speed of an air conditioner outdoor fan, characterized in that: include: After the air conditioner starts cooling, the air conditioner outdoor fan is controlled to start at a preset minimum speed; Collecting the exhaust pressure value, ambient temperature value, and condensing temperature value of the air conditioner; Based on abnormal conditions of the exhaust pressure value, the ambient temperature value and / or the condensing temperature value, the rotation speed of the air conditioner outdoor fan is controlled.

2. The speed control method according to claim 1, characterized in that: The controlling the rotation speed of the air conditioner outdoor fan based on the abnormality of the exhaust pressure value, the ambient temperature value and / or the condensing temperature value comprises: If the exhaust pressure value is normal, adjusting the speed of the air conditioner outdoor fan according to the exhaust pressure value; If the exhaust pressure value is abnormal, the ambient temperature value is normal, and the condensing temperature value is abnormal, adjusting the speed of the air conditioner outdoor fan according to the ambient temperature; If the exhaust pressure value is abnormal, the ambient temperature value is normal, and the condensing temperature value is normal, adjusting the speed of the air conditioner outdoor fan according to the ambient temperature and the condensing temperature; If the exhaust pressure value, the ambient temperature value, and the condensing temperature value are abnormal, the speed of the air conditioner outdoor fan is adjusted according to the exhaust temperature; If the exhaust pressure value is abnormal, the ambient temperature value is abnormal, and the condensing temperature value is normal, the rotation speed of the air-conditioning outdoor fan is adjusted according to the condensing temperature.

3. The speed control method according to claim 2, characterized in that: The adjusting the speed of the air conditioner outdoor fan according to the exhaust pressure value includes: Obtaining a minimum threshold value of the exhaust pressure of the air conditioner outdoor fan at the lowest speed, and a maximum threshold value of the exhaust pressure of the air conditioner outdoor fan at the highest speed; Based on the magnitude relationship between the exhaust pressure value and the exhaust pressure minimum threshold value and the exhaust pressure maximum threshold value, a speed adjustment method of the air conditioner outdoor fan is determined.

4. The speed control method according to claim 3, characterized in that: The determining of the speed adjustment method of the air conditioner outdoor fan based on the magnitude relationship between the exhaust pressure value and the exhaust pressure minimum threshold value and the exhaust pressure maximum threshold value includes: When the exhaust pressure value is greater than the exhaust pressure minimum threshold and less than the exhaust pressure maximum threshold, the speed of the air conditioner outdoor fan is kept unchanged; When the exhaust pressure value is less than or equal to the exhaust pressure minimum threshold, or when the exhaust pressure value is greater than or equal to the exhaust pressure maximum threshold, the speed of the air conditioner outdoor fan is adjusted based on the following formula: △f*(Pdi-Pfmin) / (Pfmax-Pfmin) Among them, Δf is the difference between the maximum speed and the minimum speed of the air-conditioning outdoor fan, Pdi is the exhaust pressure value, Pfmin is the minimum threshold of the exhaust pressure, and Pfmax is the maximum threshold of the exhaust pressure.

5. The speed control method according to claim 2, characterized in that: The adjusting the rotation speed of the air conditioner outdoor fan according to the ambient temperature includes: After the air-conditioning compressor is started and the ambient temperature is higher than a first preset temperature, adjusting the speed of the air-conditioning outdoor fan to a maximum speed; When the ambient temperature is lower than the first preset temperature and higher than the second preset temperature, adjusting the rotation speed of the air conditioner outdoor fan to a first rotation speed; When the ambient temperature is lower than the second preset temperature and higher than the third preset temperature, adjusting the rotation speed of the air conditioner outdoor fan to the second rotation speed; When the ambient temperature is lower than the third preset temperature, adjusting the speed of the air conditioner outdoor fan to zero; After the air-conditioning compressor is turned off, the air-conditioning outdoor fan is turned off with a delay; The second rotation speed is slower than the first rotation speed, the second preset temperature is lower than the first preset temperature, and the third preset temperature is lower than the second preset temperature.

6. The speed control method according to claim 2, characterized in that: The adjusting the rotation speed of the air conditioner outdoor fan according to the ambient temperature and the condensation temperature includes: During the preset time when the air conditioner outdoor fan is started, the rotation speed of the air conditioner outdoor fan is adjusted according to the value of the ambient temperature, wherein the value of the ambient temperature is positively correlated with the rotation speed of the air conditioner outdoor fan; After the start-up time of the air conditioner outdoor fan, the speed of the air conditioner outdoor fan is adjusted according to the magnitude relationship between the condensation temperature and the start-up temperature threshold of the air conditioner outdoor fan, wherein: When the condensing temperature is lower than the starting temperature threshold of the air conditioner outdoor fan, the rotation speed of the air conditioner outdoor fan is reduced. When the condensing temperature is higher than the starting temperature threshold of the air-conditioning outdoor fan and there is a preset temperature difference, the rotation speed of the air-conditioning outdoor fan is increased.

7. The speed control method according to claim 2, characterized in that: The adjusting the rotation speed of the air conditioner outdoor fan according to the exhaust temperature includes: After the air-conditioning compressor is started, the exhaust temperature of the air-conditioning outdoor fan is collected; When the exhaust temperature is lower than a fourth preset temperature, adjusting the speed of the air conditioner outdoor fan to zero; When the exhaust temperature is higher than the fourth preset temperature and lower than the fifth preset temperature, adjusting the rotation speed of the air conditioner outdoor fan to a third rotation speed; When the exhaust temperature is higher than the fifth preset temperature, adjusting the speed of the air conditioner outdoor fan to a maximum speed; After the air-conditioning compressor is turned off, the air-conditioning outdoor fan is turned off with a delay.

8. The speed control method according to claim 2, characterized in that: The adjusting the rotation speed of the air conditioner outdoor fan according to the condensation temperature includes: After the air-conditioning compressor is started, and when the condensing temperature is greater than the sum of the starting temperature threshold of the air-conditioning outdoor fan and the condensing temperature difference, adjusting the speed of the air-conditioning outdoor fan to the maximum speed; After the air-conditioning compressor is turned off, or when the condensing temperature is less than or equal to the starting temperature threshold of the air-conditioning outdoor fan, the air-conditioning outdoor fan is turned off with a delay.

9. A controller, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 8.

10. An air conditioner, characterized in that: include: An external fan, a compressor, a temperature sensor, a pressure sensor, and the controller according to claim 9, wherein the controller is communicatively connected to the external fan, the compressor, the temperature sensor, and the pressure sensor, respectively.

11. An energy storage system, characterized in that: include: The air conditioner as claimed in claim 10.

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