A control method of a cabinet air conditioner and a cabinet air conditioner

Abstract

The application provides a control method of a cabinet air conditioner and the cabinet air conditioner. The cabinet air conditioner comprises an indoor unit, the indoor unit comprises a shell and multiple indoor fans; the shell is formed with multiple air outlets; the multiple indoor fans are arranged in one-to-one correspondence with the multiple air outlets, and each indoor fan can be independently controlled; the control method comprises the following steps: determining a current load level of the multiple indoor fans operating simultaneously; and according to the determination result, the multiple indoor fans are cooperatively controlled, so that the rotating speed of the multiple indoor fans is adapted to the total target air output of the indoor unit and the air output capacity of each indoor fan. The control precision of the rotating speed of the indoor fan and the indoor air temperature is improved, the indoor fan is prevented from being in a high load state for a long time, the service life of the indoor fan is prolonged, the energy consumption of the cabinet air conditioner and the failure rate of the indoor fan are reduced, the air output of the indoor unit is ensured, the indoor environment is more in line with the user demand, and the user satisfaction is improved.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, and particularly relates to a control method for a cabinet air conditioner and the cabinet air conditioner itself. Background Technology

[0002] With economic and social development, people's requirements for air conditioning are getting higher and higher. Air conditioners with multiple indoor fans can deliver a large amount of air into the room and promptly adjust the indoor air temperature to the set temperature. Considering the load of the indoor fans and the energy consumption of the air conditioner, it is particularly important to design an efficient and reasonable fan control scheme. In the existing technology, some have proposed setting an individual drive device for each indoor fan, so that the other indoor fans can still operate normally when one indoor fan fails; others have proposed switching different air ducts to achieve different air outlet modes. However, these schemes cannot accurately control the speed of the indoor fans, the air volume of the indoor unit is not matched with the actual needs, the indoor fans are in a high-load state for a long time, resulting in a shortened lifespan of the indoor fans, easy failure of the indoor fans, increased energy consumption of cabinet air conditioners, and poor indoor environmental comfort. Summary of the Invention

[0003] In view of this, the present invention provides a control method for a cabinet air conditioner and a cabinet air conditioner to solve the problems in the prior art, such as low speed control accuracy of the indoor fan, indoor fan failure due to long-term high load, increased energy consumption of the cabinet air conditioner, and poor indoor environmental comfort.

[0004] This invention provides a control method for a cabinet air conditioner, the cabinet air conditioner including an indoor unit, the indoor unit including a housing and a plurality of indoor fans, the housing forming a plurality of air outlets, the plurality of indoor fans being arranged one-to-one with the plurality of air outlets, and each indoor fan being independently controllable; the control method includes:

[0005] Determine the current load level of the multiple indoor fans operating simultaneously;

[0006] Based on the determined results, the rotation speed of multiple indoor fans is controlled in a coordinated manner so that the rotation speed of the multiple indoor fans is adapted to the total target air volume of the indoor unit and the air output capacity of each indoor fan.

[0007] Further optionally, the step of collaboratively controlling multiple indoor fans based on the determined result, so that the rotational speed of the multiple indoor fans is adapted to the total target air volume of the indoor units and the air output capacity of each indoor fan, includes:

[0008] When it is determined that the current load level of one of the indoor fans requires stopping operation or reducing speed, it is determined whether the current load levels of the other indoor fans exceed their respective risk thresholds:

[0009] When it is determined that the current load level of at least one of the other indoor fans does not exceed its risk threshold, control at least one indoor fan that does not exceed its risk threshold to increase its speed.

[0010] When it is determined that the current load level of all other indoor fans has exceeded their respective risk thresholds, the speed of the other indoor fans is kept constant.

[0011] The risk threshold is 80%-90% of the maximum threshold of the indoor fan speed;

[0012] Further optionally, each of the indoor fans is provided with a rated load and a risk threshold. When the current load level of the first detected indoor fan exceeds the rated load but is less than the risk threshold, the indoor fan is controlled to reduce its speed. When the current load level of the first detected indoor fan is greater than the risk threshold, the indoor fan is controlled to stop running.

[0013] When the current load level of the other indoor fans is less than or equal to the rated load, the other indoor fans are controlled to reduce to the first speed; when the current load level of the other indoor fans exceeds the rated load but is less than the risk threshold, the other indoor fans are controlled to reduce to the second speed; when the current load level of the other indoor fans reaches or exceeds the risk threshold, the other indoor fans are controlled to maintain the original speed.

[0014] Further optionally, the current load level includes normal load, and the plurality of indoor fans include a first indoor fan and a second indoor fan; the coordinated control of the speed of the plurality of indoor fans according to the determination result includes:

[0015] If the current load level of the first indoor fan is higher than the normal load, control the first indoor fan to stop running or reduce the speed of the first indoor fan;

[0016] If the current load level of the second indoor fan is lower than the normal load, increase the speed of the second indoor fan;

[0017] When the current load level of the first indoor fan or the second indoor fan is the normal load, the corresponding indoor fan speed remains unchanged.

[0018] Further optionally, the current load level also includes ultra-high load and high load, wherein ultra-high load, high load, and normal load decrease sequentially; controlling the first indoor fan to stop operating or reduce the speed of the first indoor fan includes:

[0019] When the current load level of the first indoor fan is the ultra-high load, control the first indoor fan to stop running;

[0020] When the current load level of the first indoor fan is the high load, the speed of the first indoor fan is reduced by Δr1;

[0021] Wherein, Δr1 is the first preset rotational speed.

[0022] Further optionally, the current load level also includes low load and ultra-low load, with normal load, low load, and ultra-low load decreasing sequentially; increasing the speed of the second indoor fan includes:

[0023] When the current load level of the second indoor fan is the low load, the speed of the second indoor fan is increased by Δr2;

[0024] When the current load level of the second indoor fan is the ultra-low load, the speed of the second indoor fan is increased by Δr3;

[0025] Wherein, Δr2 is the second preset rotational speed, Δr3 is the third preset rotational speed, and Δr2 < Δr3.

[0026] Further optionally, determining the current load level of the multiple indoor fans operating simultaneously includes:

[0027] Compare M with M1, M2, M3, and M4 respectively;

[0028] When M≥M1, the current load level of the indoor fan is determined to be ultra-high load;

[0029] When M2≤M<M1, the current load level of the indoor fan is determined to be high load;

[0030] When M3≤M<M2, the current load level of the indoor fan is determined to be normal load;

[0031] When M4≤M<M3, the current load level of the indoor fan is determined to be low load;

[0032] When M < M4, the current load level of the indoor fan is determined to be ultra-low load;

[0033] Wherein, M1 is the preset value when the indoor fan is under ultra-high load, M2 is the preset value when the indoor fan is under high load, M3 is the preset value when the indoor fan is under normal load, and M4 is the preset value when the indoor fan is under low load; M1 > M2 > M3 > M4.

[0034] Further, optionally, the control method further includes:

[0035] Get T 内环 And calculate the T 内环 With T 设定 The difference △T=T 内环 -T 设定 ;

[0036] Compare the aforementioned △T with T i ;

[0037] According to △T and T i The comparison results and the current load level are used to coordinate the speed control of multiple indoor fans, so that the T 内环 With T 设定 Compatible;

[0038] Wherein, the T 内环 The current temperature of the indoor environment, T 设定 To set the temperature; the T i This is the preset temperature difference.

[0039] Further optionally, the current load level includes normal load, and the plurality of indoor fans include a first indoor fan and a second indoor fan; the cabinet air conditioner is equipped with a cooling mode, and when the cabinet air conditioner is in the cooling mode, the method based on ΔT and T... i The comparison results and the coordinated control of the speed of multiple indoor fans at the current load level include:

[0040] When ΔT is greater than T1 and the load level of any one or both of the first and second indoor fans is lower than the normal load, the speed of the indoor fan is increased by Δr4.

[0041] When ΔT is greater than T1 and the load levels of the first indoor fan and the second indoor fan are both at normal load, the first indoor fan and the second indoor fan maintain their current speed.

[0042] Wherein, T1 is the first preset temperature difference, T1 > 3℃; and Δr4 is the fourth preset rotational speed.

[0043] Further optionally, the statement based on △T and T i The comparison results and the coordinated control of the speed of multiple indoor fans at the current load level also include:

[0044] When ΔT is greater than -T2 and ΔT is less than T2, reduce the speed of any one or both of the first indoor fan and the second indoor fan by Δr5.

[0045] When ΔT is less than -T3, the first indoor fan and the second indoor fan are controlled to operate alternately.

[0046] Wherein, T2 is the second preset temperature difference, T2 < 2℃; T3 is the third preset temperature difference, T3 > 2℃; and Δr5 is the fifth preset rotational speed.

[0047] Optionally, the cabinet air conditioner is equipped with a heating mode. When the cabinet air conditioner is in the heating mode, the method based on ΔT and T... i The comparison results and the coordinated control of the speed of multiple indoor fans at the current load level include:

[0048] When ΔT is less than -T1 and the load level of any one or both of the first and second indoor fans is lower than the normal load, the speed of the indoor fan is increased by Δr4.

[0049] When ΔT is less than -T1 and the load levels of the first indoor fan and the second indoor fan are both at normal load, the first indoor fan and the second indoor fan maintain their current speed.

[0050] Wherein, T1 is the first preset temperature difference, T1 > 3℃; and Δr4 is the fourth preset rotational speed.

[0051] Further optionally, the statement based on △T and T i The comparison results and the coordinated control of the speed of multiple indoor fans at the current load level also include:

[0052] When ΔT is less than T2 and ΔT is greater than -T2, reduce the speed of any one or both of the first indoor fan and the second indoor fan by Δr5.

[0053] When △T is greater than T3, the first indoor fan and the second indoor fan are controlled to operate alternately.

[0054] Wherein, T2 is the second preset temperature difference, T2 < 2℃; T3 is the third preset temperature difference, T3 > 2℃; and Δr5 is the fifth preset rotational speed.

[0055] The present invention also provides a cabinet air conditioner, which adopts the control method of the cabinet air conditioner described in any of the above claims.

[0056] The present invention also provides a cabinet-type air conditioner, including an indoor unit, an ambient temperature detection module, a fan load detection module, a main control module, and a drive module. The indoor unit includes a housing and multiple indoor fans. The housing forms multiple air outlets, and the multiple indoor fans are arranged in a one-to-one correspondence with the multiple air outlets; wherein:

[0057] The ambient temperature detection module is used to detect the current temperature of the indoor environment and transmit the detection data to the main control module;

[0058] The fan load detection module is used to detect the current load of the indoor fan and transmit the detection data to the main control module;

[0059] The drive module is provided in multiple ways, and each drive module is connected to a plurality of indoor fans in turn. The drive module is used to drive the corresponding indoor fan to run or stop running.

[0060] The main control module is used to process the detection data from the ambient temperature detection module and the fan load detection module, and to send the operation command of the indoor fan to the drive module.

[0061] Compared with the prior art, the main advantages of the present invention are:

[0062] The system determines the current load level of multiple indoor fans operating simultaneously, and coordinates the control of these fans based on the determination results. This ensures that the speed of the multiple indoor fans matches the total target air volume of the indoor units and the air output capacity of each individual indoor fan. This improves the control accuracy of the indoor fan speed and indoor air temperature, prevents indoor fans from operating under high load for extended periods, extends the lifespan of the indoor fans, reduces the energy consumption of the cabinet air conditioner and the failure rate of the indoor fans, guarantees the air output of the indoor units, makes the indoor environment more in line with user needs, and improves user satisfaction. Attached Figure Description

[0063] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0064] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0065] Figure 1 This is a schematic diagram of the structure of an indoor unit embodiment provided by the present invention;

[0066] Figure 2A schematic diagram of the structure of an embodiment of the control device provided by the present invention;

[0067] Figure 3a and Figure 3b This is a schematic flowchart of Embodiment 1 of the control method for a cabinet air conditioner provided by the present invention;

[0068] Figure 4a and Figure 4b This is a schematic flowchart of Embodiment 2 of the control method for a cabinet air conditioner provided by the present invention;

[0069] In the picture:

[0070] 1-Casing; 21-First indoor fan; 22-Second indoor fan. Detailed Implementation

[0071] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0072] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” used in the embodiments of this invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. “Multiple” generally includes at least two, but does not exclude the inclusion of at least one.

[0073] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0074] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0075] In the existing technology, some have proposed setting up a separate drive device for each indoor fan, so that the other indoor fans can still operate normally when one indoor fan fails; others have proposed switching different air ducts to achieve different air outlet modes; however, these solutions cannot accurately control the speed of the indoor fans, the air volume of the indoor unit is not matched with the actual needs, the indoor fans are in a high load state for a long time, resulting in a shortened lifespan of the indoor fans, easy failure of the indoor fans, increased energy consumption of cabinet air conditioners, and poor indoor environmental comfort;

[0076] This invention creatively provides a control method for a cabinet air conditioner. The cabinet air conditioner includes an indoor unit, which includes a casing and multiple indoor fans. The casing has multiple air outlets. The multiple indoor fans are configured one-to-one with the multiple air outlets, and each indoor fan can be controlled independently. The control method includes: determining the current load level of the multiple indoor fans operating simultaneously; and coordinating the control of the multiple indoor fans according to the determination, so that the rotation speed of the multiple indoor fans is adapted to the total target air volume of the indoor unit and the air output capacity of each indoor fan.

[0077] Improving the speed of indoor fans and the control accuracy of indoor air temperature avoids indoor fans being under high load for extended periods, extends the lifespan of indoor fans, reduces the energy consumption of cabinet air conditioners and the failure rate of indoor fans, ensures the air volume of indoor units, makes the indoor environment more in line with user needs, and improves user satisfaction.

[0078] Example 1

[0079] like Figure 1 and Figure 3a As shown, this embodiment provides a control method for a cabinet air conditioner. The cabinet air conditioner includes an indoor unit, which includes a housing 1, a first indoor fan 21, and a second indoor fan 22. The front side wall of the housing 1 has a first air outlet and a second air outlet arranged vertically opposite to each other. An installation cavity is formed inside the housing 1. The first indoor fan 21 and the second indoor fan 22 are both installed in the installation cavity, with the first indoor fan 21 close to the first air outlet and the second indoor fan 22 close to the second air outlet. The first indoor fan 21 and the second indoor fan 22 can be controlled independently.

[0080] Control methods include:

[0081] S1. Start the cabinet air conditioner and make the first indoor fan 21 and the second indoor fan 22 run simultaneously;

[0082] S2. Determine the current load level of each indoor fan;

[0083] S3. Based on the determined results, coordinate the control of the two indoor fans to make the rotation speed of the two indoor fans match the total target air volume of the indoor unit and the air output capacity of the two indoor fans.

[0084] Furthermore, the current load levels include, in descending order, ultra-high load, high load, normal load, low load, and ultra-low load. S3 includes:

[0085] S31. When the current load level of the first indoor fan 21 is higher than the normal load, control the first indoor fan 21 to stop running or reduce the speed of the first indoor fan 21.

[0086] S32. If the current load level of the second indoor fan 22 is lower than the normal load, increase the speed of the second indoor fan 22.

[0087] S33. When the current load level of the first indoor fan 21 or the second indoor fan 22 is normal load, keep the corresponding indoor fan speed unchanged.

[0088] Specifically, S31 includes:

[0089] S311. When the current load level of the first indoor fan 21 is ultra-high load, control the first indoor fan 21 to stop running;

[0090] S312. When the current load level of the first indoor fan 21 is high load, reduce the speed of the first indoor fan 21 by Δr1.

[0091] Wherein, Δr1 is the first preset rotational speed.

[0092] S32 includes:

[0093] S321. When the current load level of the second indoor fan 22 is low, increase the speed of the second indoor fan 22 by Δr2.

[0094] S322, when the current load level of the second indoor fan 22 is ultra-low load, increase the speed of the second indoor fan 22 by Δr3;

[0095] Where Δr2 is the second preset speed, Δr3 is the third preset speed, and Δr2 < Δr3.

[0096] In addition, S2 includes:

[0097] Compare M with M1, M2, M3, and M4 respectively;

[0098] When M≥M1, the current load level of the indoor fan is determined to be ultra-high load;

[0099] If M2≤M<M1, the current load level of the indoor fan is determined to be high load;

[0100] When M3≤M<M2, the current load level of the indoor fan is determined to be normal load;

[0101] When M4≤M<M3, the current load level of the indoor fan is determined to be low load;

[0102] When M < M4, the current load level of the indoor fan is determined to be ultra-low load;

[0103] Where M1 is the preset value when the indoor fan is under ultra-high load, M2 is the preset value when the indoor fan is under high load, M3 is the preset value when the indoor fan is under normal load, and M4 is the preset value when the indoor fan is under low load; M1 > M2 > M3 > M4.

[0104] Specifically, such as Figure 3b As shown, the current load of the first indoor fan 21 is M'. When M' ≥ M1, the current load level of the first indoor fan 21 is ultra-high load. Continuing to operate the first indoor fan 21 is prone to failure, so it is necessary to control the first indoor fan 21 to stop operating. To compensate for the loss of air volume caused by the first indoor fan 21 stopping, the speed of the second indoor fan 22 can be increased. At this time, it is necessary to first determine the current load level of the second indoor fan 22. The current load of the second indoor fan 22 is M". If M" < M4, it means that the speed of the second indoor fan 22 should be increased. If the speed difference is large, Δr3 can be directly increased to make the air volume of the indoor unit reach the target air volume, thus solving the problem of air volume loss caused by the first indoor fan 21 stopping operation. If M4≤M"<M3, the speed is increased by Δr4, which can only make up for part of the air volume loss caused by the first indoor fan 21 stopping operation. If M3≤M"<M2, the second indoor fan 22 cannot run at a higher speed. It is necessary to temporarily accept the air volume loss caused by the first indoor fan 21 stopping operation, and restart it after the first indoor fan 21 stops operation for a period of time and the load decreases.

[0105] In addition, the load level of the indoor fan can be determined by detecting relevant motor operating parameters such as motor phase current, temperature rise, and power. For example, when the rated load of the indoor fan motor is 65W, if the motor phase current exceeds 0.8A, the temperature rise is greater than 75℃, or the power exceeds 90W during the operation of the cabinet air conditioner, the current load level of the indoor fan can be determined as overload. If the motor phase current is between 0.6A and 0.8A, the temperature rise is between 55℃ and 75℃, or the power is between 65W and 90W, the current load level of the indoor fan can be determined as high load. If the motor phase current is between 0.3A and 0.6A, the temperature rise is between 25℃ and 55℃, or the power is between 20W and 65W, the current load level of the indoor fan can be determined as normal load. If the motor phase current is less than 0.3A, the temperature rise is less than 25℃, or the power is less than 20W, the current load level of the indoor fan can be determined as low load. Of course, when different units use different motor specifications, the preset values ​​of the load state will change accordingly.

[0106] This embodiment also provides a cabinet air conditioner, which adopts the control method of the cabinet air conditioner described in any of the above embodiments.

[0107] like Figure 2 As shown, this embodiment also provides a cabinet-type air conditioner, including an indoor unit, a detection module, a main control module, and a drive module. The indoor unit includes a housing 1 and two indoor fans. The housing forms two air outlets, and the two indoor fans are arranged one-to-one with the two air outlets. The detection module and the drive module are both connected to the main control module. The detection module includes an ambient temperature detection module and a fan load detection module. Wherein:

[0108] The ambient temperature detection module is used to detect the current temperature of the indoor environment and transmit the detection data to the main control module;

[0109] The fan load detection module is used to detect the current load of the indoor fan and transmit the detection data to the main control module;

[0110] There are two drive modules, and each drive module is connected to one of the two indoor fans. The two drive modules are used to drive the corresponding indoor fans to run or stop.

[0111] The main control module is used to process the detection data from the ambient temperature detection module and the fan load detection module, and to send the operation command of the indoor fan to the drive module.

[0112] Specifically, the drive module includes a first drive module and a second drive module. The first drive module is connected to the first indoor fan 21, and the second drive module is connected to the second indoor fan 22. Both the first and second drive modules are electrically connected to the main control module. The main control module controls the operation of the first and second drive modules respectively based on the detection data from the detection module, thereby enabling the first indoor fan 21 and the second indoor fan 22 to operate. The main control module is also electrically connected to the user interface. The user interface can transmit user-input data to the main control module, and the main control module controls the operation of the first and second drive modules respectively based on the user-input data, thereby enabling the first indoor fan 21 and the second indoor fan 22 to operate.

[0113] Example 2

[0114] like Figure 4a As shown, unlike Example 1, the control method further includes:

[0115] P1, Obtain T 内环 And calculate T 内环 With T 设定 The difference △T=T 内环 -T 设定 ;

[0116] P2. Compare △T and T i ;

[0117] P3. Based on △T and T i The comparison results and the current load level coordinate the control of the speed of multiple indoor fans, so that T 内环 With T 设定 Compatible;

[0118] Among them, T 内环 T represents the current indoor temperature. 设定 To set the temperature; T i This is the preset temperature difference.

[0119] Furthermore, the cabinet air conditioner has a cooling mode. When the cabinet air conditioner is in cooling mode, P3 includes:

[0120] When ΔT is greater than T1 and the load level of any one or both of the first indoor fan 21 and the second indoor fan 22 is lower than the normal load, the speed of the indoor fan is increased by Δr4.

[0121] When ΔT is greater than T1 and the load levels of the first indoor fan 21 and the second indoor fan 22 are both normal loads, the first indoor fan 21 and the second indoor fan 22 are kept at their current speeds.

[0122] Where T1 is the first preset temperature difference, T1 > 3℃; Δr4 is the fourth preset rotational speed.

[0123] P3 also includes:

[0124] When ΔT is greater than -T2 and ΔT is less than T2, reduce the speed of any one or both of the first indoor fan 21 and the second indoor fan 22 by Δr5.

[0125] When ΔT is less than -T3, control the first indoor fan 21 and the second indoor fan 22 to operate alternately;

[0126] Wherein, T2 is the second preset temperature difference, T2 < 2℃; T3 is the third preset temperature difference, T3 > 2℃; and Δr5 is the fifth preset rotational speed.

[0127] Specifically, such as Figure 4b As shown, when the indoor unit is in cooling mode, both the first indoor fan 21 and the second indoor fan 22 are running. If ΔT is greater than T1, it indicates that the current indoor ambient temperature is much higher than the user-set value. If the load level of either or both of the first indoor fan 21 and the second indoor fan 22 is lower than the normal load, that is, the load of the first indoor fan 21 and the second indoor fan 22 is not high, the speed of the first indoor fan 21 and the second indoor fan 22 is increased to cool down quickly. Δr4 can vary according to the actual load. The closer the load is to the preset value, the smaller the value of Δr4, and vice versa. If the load levels of the first indoor fan 21 and the second indoor fan 22 are both normal loads, the first indoor fan 21 and the second indoor fan 22 operate reliably and maintain the current speed.

[0128] When ΔT is greater than -T2 and ΔT is less than T2, it indicates that the current indoor ambient temperature is close to the user's set value. In order to more accurately control the rate of change of indoor ambient temperature, the speed of any one or both of the first indoor fan 21 and the second indoor fan 22 is reduced by Δr5 to prevent over-adjustment of temperature.

[0129] If ΔT is less than -T3, it means that the current indoor ambient temperature is already relatively low and there is no need for cooling. In this case, one of the indoor fans will be stopped in turn, and each indoor fan will run for t time. This will meet the usage needs while reducing energy consumption and making the air conditioner more energy-efficient.

[0130] Example 3

[0131] Unlike Embodiment 2, the cabinet air conditioner is equipped with a heating mode. When the cabinet air conditioner is in heating mode, P3 further includes:

[0132] If ΔT is less than -T1 and the load level of any one or both of the first indoor fan 21 and the second indoor fan 22 is lower than the normal load, it indicates that the current indoor ambient temperature is much lower than the user set value, causing the speed of the indoor fan to increase by Δr4.

[0133] When ΔT is less than -T1 and the load levels of the first indoor fan 21 and the second indoor fan 22 are both normal loads, the first indoor fan 21 and the second indoor fan 22 are kept at their current speeds.

[0134] Wherein, T1 is the first preset temperature difference, T1 > 3℃; and Δr4 is the fourth preset rotational speed.

[0135] P3 also includes:

[0136] If ΔT is less than T2 and ΔT is greater than -T2, it means that the current indoor ambient temperature is close to the user set value, and the speed of any one or both of the first indoor fan 21 and the second indoor fan 22 is reduced by Δr5.

[0137] When △T is greater than T3, it indicates that the current indoor ambient temperature is already relatively high, so the first indoor fan 21 and the second indoor fan 22 are controlled to run alternately.

[0138] Where T2 is the second preset temperature difference, T2 < 2℃; T3 is the third preset temperature difference, T3 > 2℃; Δr5 is the fifth preset rotational speed, and Δr5 < Δr4.

[0139] Example 4

[0140] Unlike Example 1, the method of coordinating the control of multiple indoor fans based on the determined results, so that the rotational speed of the multiple indoor fans is adapted to the total target air volume of the indoor units and the air output capacity of each indoor fan, includes:

[0141] When it is determined that the current load level of one indoor fan requires it to be stopped or its speed reduced, determine whether the current load levels of the other indoor fans exceed their respective risk thresholds:

[0142] When it is determined that the current load level of at least one of the other indoor fans does not exceed its risk threshold, control at least one indoor fan that does not exceed its risk threshold to increase its speed.

[0143] When it is determined that the current load level of other indoor fans has exceeded their respective risk thresholds, the speed of other indoor fans is kept constant.

[0144] The risk threshold is 80%-90% of the maximum threshold of the indoor fan speed.

[0145] Furthermore, each indoor fan is equipped with a rated load and a risk threshold. When the current load level of the first detected indoor fan exceeds the rated load but is less than the risk threshold, the indoor fan is controlled to reduce its speed. When the current load level of the first detected indoor fan is greater than the risk threshold, the indoor fan is controlled to stop running.

[0146] When the current load level of other indoor fans is less than or equal to the rated load, control other indoor fans to reduce their speed to the first speed; when the current load level of other indoor fans exceeds the rated load but is less than the risk threshold, control other indoor fans to reduce their speed to the second speed; when the current load level of other indoor fans reaches or exceeds the risk threshold, control other indoor fans to maintain their original speed.

[0147] Specifically, when it is determined that the current load level of the first indoor fan requires it to stop operating or reduce its speed, it is then determined whether the current load level of the second indoor fan exceeds its risk threshold:

[0148] When it is determined that the current load level of the second indoor fan does not exceed its risk threshold, the speed of the second indoor fan is increased.

[0149] When it is determined that the current load level of the second indoor fan has exceeded its respective risk threshold, the speed of the second indoor fan is kept constant.

[0150] The risk threshold is 80%-90% of the maximum threshold of the rotational speed of the first indoor fan and the second indoor fan.

[0151] Both the first indoor fan and the second indoor fan are equipped with rated load and risk threshold. When the current load level of the first indoor fan exceeds the rated load but is less than the risk threshold, the speed of the first indoor fan is reduced. When the current load level of the first indoor fan is greater than the risk threshold, the first indoor fan is stopped.

[0152] When the current load level of the second indoor fan is less than or equal to the rated load, the second indoor fan is controlled to reduce to the first speed; when the current load level of the second indoor fan exceeds the rated load but is less than the risk threshold, the second indoor fan is controlled to reduce to the second speed; when the current load level of the second indoor fan reaches or exceeds the risk threshold, the second indoor fan is controlled to maintain the original speed.

[0153] Exemplary embodiments of this disclosure have been specifically shown and described above. It should be understood that this disclosure is not limited to the detailed structures, arrangements, or implementations described herein; rather, this disclosure is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

Claims

1. A control method for a cabinet-type air conditioner, characterized in that, The cabinet-type air conditioner includes an indoor unit, which includes a housing and multiple indoor fans. The housing has multiple air outlets, and the multiple indoor fans are configured one-to-one with the multiple air outlets. Each indoor fan can be independently controlled. The control method includes: Determine the current load level of the multiple indoor fans operating simultaneously; Based on the determined results, multiple indoor fans are controlled in a coordinated manner to match the rotational speed of the multiple indoor fans with the total target air volume of the indoor unit and the air output capacity of each indoor fan. The step of coordinating control of multiple indoor fans based on the determined result, so that the rotational speed of the multiple indoor fans is adapted to the total target air volume of the indoor units and the air output capacity of each indoor fan, includes: When it is determined that the current load level of one of the indoor fans requires stopping operation or reducing speed, it is determined whether the current load levels of the other indoor fans exceed their respective risk thresholds: When it is determined that the current load level of at least one of the other indoor fans does not exceed its risk threshold, control at least one indoor fan that does not exceed its risk threshold to increase its speed. When it is determined that the current load level of all other indoor fans has exceeded their respective risk thresholds, the speed of the other indoor fans is kept constant. The current load level includes normal load, and the multiple indoor fans include a first indoor fan and a second indoor fan; the coordinated control of the multiple indoor fans based on the determination result includes: If the current load level of the first indoor fan is higher than the normal load, control the first indoor fan to stop running or reduce the speed of the first indoor fan; If the current load level of the second indoor fan is lower than the normal load, increase the speed of the second indoor fan; When the current load level of the first indoor fan or the second indoor fan is the normal load, the corresponding indoor fan speed remains unchanged.

2. The control method for a cabinet air conditioner according to claim 1, characterized in that, The current load level also includes ultra-high load and high load, with ultra-high load, high load, and normal load decreasing sequentially; controlling the first indoor fan to stop operating or reducing the speed of the first indoor fan includes: When the current load level of the first indoor fan is the ultra-high load, control the first indoor fan to stop running; When the current load level of the first indoor fan is the high load, the speed of the first indoor fan is reduced by Δr1; Wherein, Δr1 is the first preset rotational speed.

3. The control method for a cabinet air conditioner according to claim 2, characterized in that, The current load level also includes low load and ultra-low load, with normal load, low load, and ultra-low load decreasing sequentially; increasing the speed of the second indoor fan includes: When the current load level of the second indoor fan is the low load, the speed of the second indoor fan is increased by Δr2; When the current load level of the second indoor fan is the ultra-low load, the speed of the second indoor fan is increased by Δr3; Wherein, Δr2 is the second preset rotational speed, Δr3 is the third preset rotational speed, and Δr2 < Δr3.

4. The control method for a cabinet air conditioner according to claim 1, characterized in that, Determining the current load level of the multiple indoor fans operating simultaneously includes: Compare M with M1, M2, M3, and M4 respectively; When M≥M1, the current load level of the indoor fan is determined to be ultra-high load; When M2≤M<M1, the current load level of the indoor fan is determined to be high load; When M3≤M<M2, the current load level of the indoor fan is determined to be normal load; When M4≤M<M3, the current load level of the indoor fan is determined to be low load; When M < M4, the current load level of the indoor fan is determined to be ultra-low load; Wherein, M is the current load of the indoor fan, M1 is the preset value when the indoor fan is under ultra-high load, M2 is the preset value when the indoor fan is under high load, M3 is the preset value when the indoor fan is under normal load, and M4 is the preset value when the indoor fan is under low load; M1 > M2 > M3 > M4.

5. The control method for a cabinet air conditioner according to claim 1, characterized in that, The control method further includes: Get T 内环 And calculate the T 内环 With T 设定 The difference △T=T 内环 -T 设定 ; Compare the aforementioned △T with T i ; According to △T and T i The comparison results and the current load level are used to coordinate the speed control of multiple indoor fans, so that the T 内环 With T 设定 Compatible; Wherein, the T 内环 The current indoor temperature, T 设定 To set the temperature; the T i This is the preset temperature difference.

6. The control method for a cabinet air conditioner according to claim 5, characterized in that, The cabinet air conditioner is equipped with a cooling mode. When the cabinet air conditioner is in the cooling mode, the method based on ΔT and T... i The comparison results and the coordinated control of the speed of multiple indoor fans at the current load level include: When ΔT is greater than T1 and the load level of any one or both of the first and second indoor fans is lower than the normal load, the speed of the indoor fan is increased by Δr4. When ΔT is greater than T1 and the load levels of the first indoor fan and the second indoor fan are both at normal load, the first indoor fan and the second indoor fan maintain their current speed. Wherein, T1 is the first preset temperature difference, T1 > 3℃; and Δr4 is the fourth preset rotational speed.

7. The control method for a cabinet air conditioner according to claim 6, characterized in that, The basis of △T and T i The comparison results and the coordinated control of the speed of multiple indoor fans at the current load level also include: When ΔT is greater than -T2 and ΔT is less than T2, reduce the speed of any one or both of the first indoor fan and the second indoor fan by Δr5. When ΔT is less than -T3, the first indoor fan and the second indoor fan are controlled to operate alternately. Wherein, T2 is the second preset temperature difference, T2 < 2℃; T3 is the third preset temperature difference, T3 > 2℃; and Δr5 is the fifth preset rotational speed.

8. The control method for a cabinet air conditioner according to claim 6, characterized in that, The cabinet air conditioner is equipped with a heating mode. When the cabinet air conditioner is in the heating mode, the method based on ΔT and T... i The comparison results and the coordinated control of the speed of multiple indoor fans at the current load level include: When ΔT is less than -T1 and the load level of any one or both of the first and second indoor fans is lower than the normal load, the speed of the indoor fan is increased by Δr4. When ΔT is less than -T1 and the load levels of the first indoor fan and the second indoor fan are both at normal load, the first indoor fan and the second indoor fan maintain their current speed. Wherein, T1 is the first preset temperature difference, T1 > 3℃; and Δr4 is the fourth preset rotational speed.

9. The control method for a cabinet air conditioner according to claim 8, characterized in that, The basis of △T and T i The comparison results and the coordinated control of the speed of multiple indoor fans at the current load level also include: When ΔT is less than T2 and ΔT is greater than -T2, reduce the speed of any one or both of the first indoor fan and the second indoor fan by Δr5. When △T is greater than T3, the first indoor fan and the second indoor fan are controlled to operate alternately. Wherein, T2 is the second preset temperature difference, T2 < 2℃; T3 is the third preset temperature difference, T3 > 2℃; and Δr5 is the fifth preset rotational speed.

10. A cabinet-type air conditioner, characterized in that, The control method for the cabinet air conditioner according to any one of claims 1 to 9 is adopted.

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