A wind wall air conditioner and a control method, device, equipment and medium thereof

Abstract

The application discloses a wind wall air conditioner and a control method, device, equipment and medium thereof, so as to ensure uniform air supply temperature of the wind wall air conditioner under low load. The wind wall air conditioner comprises a fan module, a compressor, a condenser, two evaporators and electronic expansion valves connected with the two evaporators respectively, wherein the fan module comprises two groups of fans, each group comprising a plurality of fans, the fans in the fan module are arranged in the same plane, and a partition plate is arranged between adjacent fans; the two evaporators are connected in parallel between the compressor and the condenser, and each evaporator is arranged in parallel with at least one group of fans.

Description

Technical Field

[0001] This application relates to the field of refrigeration technology, and in particular to a wind-wall air conditioner and its control method, device, equipment and medium. Background Technology

[0002] With the rapid development of data centers, heat density continues to increase, leading to a proliferation of cooling methods. Airwall air conditioning, as a new cooling solution, offers advantages such as a large cooling range, large air delivery area, and high space utilization within the same frame.

[0003] When using a compressor for cooling in a wall-mounted air conditioner, a copper tube aluminum fin evaporator is typically employed. This type of evaporator requires the use of a distributor, nozzles, and capillary tubes to evenly distribute the refrigerant to each evaporator circuit. During the selection and design phase, these distributors are often chosen based on 100% load. This results in insufficient pressure drop across the distributor and capillary tubes at low loads, leading to uneven refrigerant distribution. In this situation, circuits with less refrigerant have lower cooling capacity and cannot cool the passing air to the target temperature, resulting in uneven supply air temperature. Summary of the Invention

[0004] This application provides a wall-mounted air conditioner and its control method, device, equipment and medium, so that the wall-mounted air conditioner can still ensure uniform air supply temperature under low load.

[0005] In a first aspect, embodiments of this application provide a wall-mounted air conditioner, comprising: a fan module, a compressor, a condenser, two evaporators, and electronic expansion valves respectively connected to the two evaporators, wherein...

[0006] The fan module includes two sets of fans, each set including multiple fans. The fans in the fan module are arranged on the same plane, and a partition is provided between adjacent fans.

[0007] The two evaporators are connected in parallel between the compressor and the condenser, and each evaporator is arranged in parallel with at least one set of fans.

[0008] In the aforementioned wall-mounted air conditioner, the fan module is divided into two groups of fans, and the evaporator is also set as two evaporators connected in parallel. The evaporators are arranged in parallel with the fan module, and each evaporator is arranged in parallel with at least one group of fans. In this way, when the wall-mounted air conditioner is under low load, by controlling the shutdown of one evaporator, the refrigerant flow of the other evaporator is increased, thereby ensuring that the air passing through the evaporator can be cooled to the target temperature and ensuring that the air supply temperature of the wall-mounted air conditioner is uniform.

[0009] In one possible implementation, the two evaporators are arranged in parallel with a set of fans.

[0010] In the aforementioned wall-mounted air conditioner, two evaporators are arranged in parallel with a set of fans. When the wall-mounted air conditioner is under low load, one of the evaporators and the set of fans arranged in parallel with the evaporator can be turned off by controlling the refrigerant flow of the other evaporator to increase the refrigerant flow rate, thereby ensuring that the air passing through the evaporator can be cooled to the target temperature and ensuring that the air supply temperature of the wall-mounted air conditioner is uniform.

[0011] In one possible implementation, the two evaporators are arranged in parallel with the two sets of fans, and the pipes of the two evaporators are spaced apart.

[0012] In the aforementioned wall-mounted air conditioner, both evaporators are arranged in parallel with two sets of fans, and the pipes of the two evaporators are spaced apart. When the wall-mounted air conditioner is under low load, the liquid distribution effect of the electronic expansion valve connected to one of the evaporators can be improved by controlling the closure of the electronic expansion valve connected to the other evaporator, thereby ensuring that the air passing through the evaporator can be cooled to the target temperature and ensuring that the air supply temperature of the wall-mounted air conditioner is uniform.

[0013] In a second aspect, embodiments of this application provide a control method for a wall-mounted air conditioner, applied to the wall-mounted air conditioner provided in the first aspect of embodiments of this application, the method comprising:

[0014] Determine that the load of the air-conditioner is less than a first preset threshold;

[0015] Control the speed of the first set of fans to decrease and increase the speed of the second set of fans;

[0016] Control the closure of the electronic expansion valve connected to the evaporator, which is arranged parallel to the first set of fans.

[0017] In the above method, when the air-wall air conditioner is under low load, the speed of the first set of fans is reduced and the speed of the second set of fans is increased. At the same time, the electronic expansion valve connected to the evaporator that is set parallel to the first set of fans is closed, so that the refrigerant flow of the evaporator that is set parallel to the second set of fans increases, thereby ensuring that the air passing through this evaporator can be cooled to the target temperature and ensuring that the air supply temperature of the air-wall air conditioner is uniform.

[0018] In one possible implementation, the control of reducing the speed of the first set of fans and increasing the speed of the second set of fans includes:

[0019] Obtain the initial speed of each fan;

[0020] The speed of the first group of fans is reduced to a first speed, and the speed of the second group of fans is increased to a second speed, wherein the second speed is greater than the first speed, and the sum of the air volume provided by the first group of fans at the first speed and the air volume provided by the second group of fans at the second speed is equal to the sum of the air volume provided by all fans at the initial speed.

[0021] In the above method, when specifically controlling the reduction of the speed of the first group of fans and the increase of the speed of the second group of fans, the air volume provided by the first group of fans at the first speed and the air volume provided by the second group of fans at the second speed are adjusted to be equal to the sum of the air volume provided by all fans at the initial speed, thereby ensuring the air volume provided by the entire fan module and ensuring the cooling capacity of the air wall air conditioner.

[0022] In one possible implementation, the control of reducing the speed of the first set of fans to a first speed and increasing the speed of the second set of fans to a second speed includes:

[0023] Obtain the temperature of each fan's air supply channel and the real-time wind speed of each fan;

[0024] The average air supply temperature of the fan module is calculated based on the temperature of the air supply channels of each fan and the real-time wind speed of each fan.

[0025] When the difference between the average supply air temperature and the preset target temperature is within a preset range, the speed of the first set of fans is controlled to decrease to the first speed by a first step, and the speed of the second set of fans is increased to the second speed by a second step.

[0026] In the above method, the average supply air temperature of the fan module is calculated, and the speed of the first and second sets of fans is adjusted when the difference between the average supply air temperature of the fan module and the preset target temperature is within a preset range, so as to ensure the cooling capacity provided by the fan module and avoid the temperature of the data center computer room from being too high.

[0027] In one possible implementation, the method further includes:

[0028] The load of the air-conditioner is determined to be greater than a second preset threshold, wherein the second preset threshold is greater than or equal to the first preset threshold;

[0029] Control the speed of the first set of fans to increase and the speed of the second set of fans to decrease;

[0030] The electronic expansion valve connected to the evaporator, which is arranged parallel to the first set of fans, is controlled to open.

[0031] In the above method, when it is determined that the load of the air-wall air conditioner is greater than the second preset threshold, that is, when the air-wall air conditioner is under normal or high load, the speed of the first set of fans is increased and the speed of the second set of fans is decreased. At the same time, the electronic expansion valve connected to the evaporator set parallel to the first set of fans is opened, so that both sets of fans in the fan module work normally and both evaporators perform cooling, ensuring the cooling capacity of the air-wall air conditioner.

[0032] In one possible implementation, the control of increasing the speed of the first group of fans and decreasing the speed of the second group of fans includes:

[0033] The initial rotational speeds of the first group of fans and the second group of fans were obtained respectively;

[0034] The speed of the first set of fans is increased to a third speed, and the speed of the second set of fans is decreased to a fourth speed. The sum of the air volume provided by the first set of fans at the third speed and the air volume provided by the second set of fans at the fourth speed is equal to the sum of the air volume provided by the first set of fans and the second set of fans at the initial speed.

[0035] In the above method, when specifically controlling the speed of the first group of fans to increase to the third speed and the speed of the second group of fans to decrease to the fourth speed, the sum of the air volume provided by the first group of fans at the third speed and the air volume provided by the second group of fans at the fourth speed is adjusted to be equal to the sum of the air volume provided by the first group of fans and the second group of fans at the initial speed, thereby ensuring the air volume provided by the entire fan module and ensuring the cooling capacity of the air wall air conditioner.

[0036] In one possible implementation, the control of increasing the speed of the first group of fans to a third speed and decreasing the speed of the second group of fans to a fourth speed includes:

[0037] Obtain the temperature of each fan's air supply channel and the real-time wind speed of each fan;

[0038] The average air supply temperature of the fan module is calculated based on the temperature of the air supply channels of each fan and the real-time wind speed of each fan.

[0039] When the difference between the average supply air temperature and the preset target temperature is within a preset range, the speed of the first group of fans is increased to the third speed in a third step, and the speed of the second group of fans is decreased to the fourth speed in a fourth step.

[0040] In the above method, the average supply air temperature of the fan module is calculated, and the speed of the first and second sets of fans is adjusted when the difference between the average supply air temperature of the fan module and the preset target temperature is within a preset range, so as to ensure the cooling capacity provided by the fan module and avoid the temperature of the data center computer room from being too high.

[0041] In one possible implementation, calculating the average supply air temperature of the fan module based on the temperature of the air supply channels of each fan and the real-time wind speed of each fan includes:

[0042] The average supply air temperature of the fan module is calculated using the following formula:

[0043] T=T1×Q1 / Q+T2×Q2 / Q+……+Ti×Qi / Q Formula 1

[0044] Where T is the average supply air temperature, Ti is the temperature of the air supply channel of the i-th fan, Qi is the air volume provided by the i-th fan, which can be determined according to the real-time speed of the i-th fan, and Q is the total air volume provided by all fans.

[0045] Thirdly, embodiments of this application provide a control method for a wall-mounted air conditioner, applied to the wall-mounted air conditioner provided in the first aspect of embodiments of this application, the method comprising:

[0046] Determine that the load of the air-conditioner is less than a third preset threshold;

[0047] Control the closure of the first electronic expansion valve and control the increase of the opening of the second electronic expansion valve.

[0048] In the above method, when the air-wall air conditioner is under low load, the first electronic expansion valve is closed and the opening of the second electronic expansion valve is increased, thereby improving the liquid distribution effect of the second electronic expansion valve, ensuring that the air passing through the evaporator can be cooled to the target temperature, and ensuring that the air supply temperature of the air-wall air conditioner is uniform.

[0049] In one possible implementation, controlling the closing of the first electronic expansion valve and controlling the increase of the opening of the second electronic expansion valve includes:

[0050] The initial opening degrees of the first electronic expansion valve and the second electronic expansion valve are obtained respectively;

[0051] The opening of the first electronic expansion valve is controlled to close by a first set step, and the opening of the second electronic expansion valve is controlled to increase to a first opening by a second set step, wherein the first opening is equal to the product of the sum of the initial openings of the first and second electronic expansion valves and a first preset coefficient.

[0052] In the above method, when specifically controlling the closing of the first electronic expansion valve and controlling the increase of the opening of the second electronic expansion valve, the opening of the first electronic expansion valve is controlled to close by a first set step, and the opening of the second electronic expansion valve is controlled to increase to the first opening by a second set step. The first opening is equal to the product of the sum of the initial openings of the first and second electronic expansion valves and the first preset coefficient, thereby ensuring the cooling capacity of the air-wall air conditioner.

[0053] In one possible implementation, the method further includes:

[0054] When the opening degree of the second electronic expansion valve is increased to the first opening degree, the intake superheat of the second electronic expansion valve is obtained;

[0055] When the intake superheat is less than a preset safety threshold, the second electronic expansion valve is controlled to switch to a preset superheat control mode.

[0056] In the above method, when the opening of the second electronic expansion valve is increased to the first opening by a set step size, the suction superheat of the second electronic expansion valve is obtained. When the suction superheat is less than the preset safety threshold, the second electronic expansion valve is controlled to switch to the preset superheat control mode to ensure the cooling capacity provided by the air wall air conditioner and avoid the temperature of the data center computer room from being too high.

[0057] In one possible implementation, the method further includes:

[0058] The load of the air-conditioner is determined to be greater than a fourth preset threshold, wherein the fourth preset threshold is greater than or equal to the third preset threshold;

[0059] The control opens the first electronic expansion valve and reduces the opening degree of the second electronic expansion valve.

[0060] In the above method, when it is determined that the load of the wall-mounted air conditioner is greater than the second preset threshold, that is, when the wall-mounted air conditioner is under normal or high load, the first electronic expansion valve is opened and the opening of the second electronic expansion valve is reduced, so that both evaporators work normally to cool, ensuring the cooling capacity of the wall-mounted air conditioner.

[0061] In one possible implementation, the control to open the first electronic expansion valve and reduce the opening of the second electronic expansion valve includes:

[0062] The initial opening degree of the first electronic expansion valve and the second electronic expansion valve are obtained respectively;

[0063] The first electronic expansion valve is controlled to open to the second opening degree by a third preset step, and the second electronic expansion valve is controlled to close to the second opening degree by a fourth preset step, wherein the second opening degree is equal to the product of the average value of the initial opening degree of the first electronic expansion valve and the second electronic expansion valve and a second preset coefficient.

[0064] In the above method, when specifically controlling the opening of the first electronic expansion valve and reducing the opening of the second electronic expansion valve, the opening of the first electronic expansion valve and the second electronic expansion valve are adjusted so that they are both the product of the average value of the initial opening of the first electronic expansion valve and the second electronic expansion valve and the second preset coefficient, thereby ensuring the cooling capacity of the air-wall air conditioner.

[0065] In one possible implementation, the method further includes:

[0066] When the first electronic expansion valve is opened to the second opening degree, the intake superheat of the first electronic expansion valve is obtained;

[0067] When the intake superheat is less than a preset safety threshold, the first electronic expansion valve is controlled to switch to a preset superheat control mode.

[0068] In the above method, when the first electronic expansion valve is opened to the second opening degree by the second set step, the suction superheat of the first electronic expansion valve is obtained. When the suction superheat is less than the preset safety threshold, the first electronic expansion valve is controlled to switch to the preset superheat control mode to ensure the cooling capacity provided by the air wall air conditioner and avoid the temperature of the data center computer room from being too high.

[0069] Fourthly, embodiments of this application provide a control device for a wall-mounted air conditioner, applied to the wall-mounted air conditioner provided in the first aspect of embodiments of this application, the device comprising:

[0070] The processing unit is used to determine that the load of the air-wall air conditioner is less than a first preset threshold.

[0071] The first control unit is used to control the reduction of the speed of the first set of fans and the increase of the speed of the second set of fans;

[0072] The second control unit is used to control the closure of the electronic expansion valve connected to the evaporator, which is arranged parallel to the first set of fans.

[0073] In one possible implementation, the first control unit is specifically used for:

[0074] Obtain the initial speed of each fan;

[0075] The speed of the first group of fans is reduced to a first speed, and the speed of the second group of fans is increased to a second speed, wherein the second speed is greater than the first speed, and the sum of the air volume provided by the first group of fans at the first speed and the air volume provided by the second group of fans at the second speed is equal to the sum of the air volume provided by all fans at the initial speed.

[0076] In one possible implementation, the first control unit is specifically used for:

[0077] Obtain the temperature of each fan's air supply channel and the real-time wind speed of each fan;

[0078] The average air supply temperature of the fan module is calculated based on the temperature of the air supply channels of each fan and the real-time wind speed of each fan.

[0079] When the difference between the average supply air temperature and the preset target temperature is within a preset range, the speed of the first set of fans is controlled to decrease to the first speed by a first step, and the speed of the second set of fans is increased to the second speed by a second step.

[0080] In one possible implementation, the processing unit is further configured to: determine that the load of the air-conditioning wall is greater than a second preset threshold, wherein the second preset threshold is greater than or equal to the first preset threshold;

[0081] The first control unit is also used to: control the increase of the speed of the first group of fans and the decrease of the speed of the second group of fans;

[0082] The second control unit is also used to: control the opening of the electronic expansion valve connected to the evaporator that is arranged parallel to the first set of fans.

[0083] In one possible implementation, the first control unit is specifically used for:

[0084] The initial rotational speeds of the first group of fans and the second group of fans were obtained respectively;

[0085] The speed of the first set of fans is increased to a third speed, and the speed of the second set of fans is decreased to a fourth speed. The sum of the air volume provided by the first set of fans at the third speed and the air volume provided by the second set of fans at the fourth speed is equal to the sum of the air volume provided by the first set of fans and the second set of fans at the initial speed.

[0086] In one possible implementation, the first control unit is specifically used for:

[0087] Obtain the temperature of each fan's air supply channel and the real-time wind speed of each fan;

[0088] The average air supply temperature of the fan module is calculated based on the temperature of the air supply channels of each fan and the real-time wind speed of each fan.

[0089] When the difference between the average supply air temperature and the preset target temperature is within a preset range, the speed of the first group of fans is increased to the third speed in a third step, and the speed of the second group of fans is decreased to the fourth speed in a fourth step.

[0090] In one possible implementation, the first control unit is specifically used for:

[0091] The average supply air temperature of the fan module is calculated using the following formula:

[0092] T=T1×Q1 / Q+T2×Q2 / Q+……+Ti×Qi / Q Formula 1

[0093] Where T is the average supply air temperature, Ti is the temperature of the air supply channel of the i-th fan, Qi is the air volume provided by the i-th fan, which can be determined according to the real-time speed of the i-th fan, and Q is the total air volume provided by all fans.

[0094] Fifthly, this application provides a control device for a wall-mounted air conditioner, applied to the wall-mounted air conditioner of this application, the device comprising:

[0095] The processing unit is used to determine that the load of the air-conditioning wall is less than a third preset threshold.

[0096] The control unit is used to control the closure of the first electronic expansion valve and to control the increase of the opening of the second electronic expansion valve.

[0097] In one possible implementation, the control unit is specifically used for:

[0098] The initial opening degrees of the first electronic expansion valve and the second electronic expansion valve are obtained respectively;

[0099] The opening of the first electronic expansion valve is controlled to close by a first set step, and the opening of the second electronic expansion valve is controlled to increase to a first opening by a second set step, wherein the first opening is equal to the product of the sum of the initial openings of the first and second electronic expansion valves and a first preset coefficient.

[0100] In one possible implementation, the control unit is further configured to:

[0101] When the opening degree of the second electronic expansion valve is increased to the first opening degree, the intake superheat of the second electronic expansion valve is obtained;

[0102] When the intake superheat is less than a preset safety threshold, the second electronic expansion valve is controlled to switch to a preset superheat control mode.

[0103] In one possible implementation, the processing unit is further configured to: determine that the load of the air-wall air conditioner is greater than a fourth preset threshold, wherein the fourth preset threshold is greater than or equal to the third preset threshold;

[0104] The control unit is also used to: control the opening of the first electronic expansion valve and reduce the opening degree of the second electronic expansion valve.

[0105] In one possible implementation, the control unit is specifically used for:

[0106] The initial opening degree of the first electronic expansion valve and the second electronic expansion valve are obtained respectively;

[0107] The first electronic expansion valve is controlled to open to the second opening degree by a third preset step, and the second electronic expansion valve is controlled to close to the second opening degree by a fourth preset step, wherein the second opening degree is equal to the product of the average value of the initial opening degree of the first electronic expansion valve and the second electronic expansion valve and a second preset coefficient.

[0108] In one possible implementation, the control unit is further configured to:

[0109] When the first electronic expansion valve is opened to the second opening degree, the intake superheat of the first electronic expansion valve is obtained;

[0110] When the intake superheat is less than a preset safety threshold, the first electronic expansion valve is controlled to switch to a preset superheat control mode.

[0111] In a sixth aspect, embodiments of this application provide an electronic device, the device including a processor and a memory, the memory being used to store a program executable by the processor, and the processor being used to read the program in the memory and execute the method described in any one of the second or third aspects.

[0112] In a seventh aspect, embodiments of this application also provide a computer storage medium having a computer program stored thereon, which, when executed by a processor, is used to implement the steps of the methods described in the second or third aspect above.

[0113] Eighthly, this application provides a computer program product comprising: computer program code, which, when executed on a computer, causes the computer to perform the method described in any one of the second or third aspects.

[0114] For the technical effects that may be achieved in each of the fourth, fifth, sixth, seventh, and eighth aspects mentioned above, please refer to the description of the technical effects that may be achieved in the various possible solutions for the second or third aspects mentioned above, which will not be repeated here. Attached Figure Description

[0115] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0116] Figure 1 This is a schematic diagram of the structure of a wall-mounted air conditioner provided in an embodiment of this application;

[0117] Figure 2 This is a schematic diagram of the fan module of the air-wall air conditioner provided in an embodiment of this application;

[0118] Figure 3 A schematic diagram showing the parallel arrangement of the fan module and evaporator in a wall-mounted air conditioner provided in an embodiment of this application;

[0119] Figure 4 This is a schematic diagram of another air-wall air conditioner provided in an embodiment of this application;

[0120] Figure 5 A schematic flowchart illustrating a control method for a wall-mounted air conditioner provided in an embodiment of this application;

[0121] Figure 6 A schematic flowchart illustrating the specific implementation process of a control method for a wall-mounted air conditioner provided in this application embodiment;

[0122] Figure 7 A schematic flowchart illustrating the specific implementation process of another control method for a wall-mounted air conditioner provided in this application embodiment;

[0123] Figure 8 A schematic flowchart illustrating another control method for a wall-mounted air conditioner provided in an embodiment of this application;

[0124] Figure 9 A schematic flowchart illustrating the specific implementation process of another control method for a wall-mounted air conditioner provided in this application embodiment;

[0125] Figure 10 A schematic flowchart illustrating the specific implementation process of the control method for a single-wall air conditioner provided in this application embodiment;

[0126] Figure 11 This is a schematic diagram of the structure of a control device for a wall-mounted air conditioner provided in an embodiment of this application;

[0127] Figure 12 This is a schematic diagram of the control device for another air-wall air conditioner provided in an embodiment of this application;

[0128] Figure 13 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0129] Figure 14 This is a schematic diagram of the structure of another electronic device provided in an embodiment of this application. Detailed Implementation

[0130] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0131] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0132] In the following text, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0133] Before introducing the air-wall air conditioner and its control scheme provided in the embodiments of this application, the technical background of the embodiments of this application will be described in detail for ease of understanding.

[0134] With the rapid development of data centers, heat density continues to increase, leading to a proliferation of cooling methods. Airwall air conditioning, as a new cooling solution, offers advantages such as a large cooling range, large air delivery area, and high space utilization within the same frame.

[0135] When using a compressor for cooling in a wall-mounted air conditioner, a copper-tube, aluminum-fin evaporator is typically employed. This type of evaporator requires a distributor, nozzles, and capillary tubes to evenly distribute the refrigerant to each evaporator circuit. However, during the selection and design phase, these distributors are often chosen based on 100% load. This can lead to insufficient pressure drop across these components at low loads, resulting in uneven refrigerant distribution. In such cases, circuits with less refrigerant have lower cooling capacity and cannot cool the passing air to the target temperature, resulting in uneven supply air temperature.

[0136] In view of this, embodiments of this application provide a wall-mounted air conditioner and its control method, device, equipment and medium. The fan module of the wall-mounted air conditioner is divided into two groups of fans, and the evaporator is also set as two evaporators connected in parallel. The evaporators are arranged in parallel with the fan module, and each evaporator is arranged in parallel with at least one group of fans. In this way, when the wall-mounted air conditioner is under low load, by controlling the shutdown of one evaporator, the refrigerant flow of the other evaporator is increased, thereby ensuring that the air passing through the evaporator can be cooled to the target temperature and ensuring that the air supply temperature of the wall-mounted air conditioner is uniform.

[0137] After introducing the background technology of the embodiments of this application, the following describes in detail the air-wall air conditioner and its control scheme provided by the embodiments of this application with reference to specific embodiments.

[0138] See Figure 1As shown, it is a structural schematic diagram of a wall-mounted air conditioner provided in an embodiment of this application, which specifically includes: a fan module (not shown in the figure), a compressor 11, a condenser 12, two evaporators 13, and electronic expansion valves 14 connected to the two evaporators respectively.

[0139] The fan module includes two sets of fans, each set including multiple fans. The fans in the fan module are arranged on the same plane, and there are partitions between adjacent fans to ensure that each fan is not affected by other fans.

[0140] Two evaporators 13 are connected in parallel between the compressor 11 and the condenser 12, and each evaporator 13 is arranged in parallel with at least one set of fans.

[0141] It should be noted that the air-wall air conditioner provided in this application embodiment may also include other components, such as temperature and humidity sensors installed in the air supply channels of each fan, and negative temperature coefficient thermistors (NTC) installed at the evaporator outlet for detecting the refrigerant temperature at the evaporator outlet.

[0142] In one example, such as Figure 2 As shown, taking a fan module comprising four fans 20 as an example, the four fans 20 are arranged on the same plane, and each adjacent fan 20 is separated by a partition 21. The four fans 20 can be divided into two groups, such as a first group of fans 22 and a second group of fans 23. Figure 3 As shown, the fan 20 in the fan module is arranged in parallel with the evaporator 30.

[0143] In the air-wall air conditioner provided in this application embodiment, the fan module is divided into two groups of fans, and the evaporator is also set as two evaporators connected in parallel. The evaporators are arranged in parallel with the fan module, and each evaporator is arranged in parallel with at least one group of fans. In this way, when the air-wall air conditioner is under low load, by controlling the shutdown of one of the evaporators, the refrigerant flow of the other evaporator is increased, thereby ensuring that the air passing through the evaporator can be cooled to the target temperature and ensuring that the air supply temperature of the air-wall air conditioner is uniform.

[0144] In practice, each evaporator is arranged in parallel with at least one set of fans, and there are at least two implementation methods:

[0145] Implementation Method 1: Two evaporators are set up in parallel with a set of fans.

[0146] For example, Figure 1 An evaporator shown in the image and Figure 2 The first group of fans 22 shown in the figure are arranged in parallel. Figure 1 Another evaporator shown in the image is... Figure 2 The second set of fans 23 shown in the figure are arranged in parallel.

[0147] In this embodiment, the two evaporators are arranged in parallel with a set of fans. When the air-wall air conditioner is under low load, the refrigerant flow of the other evaporator can be increased by controlling the shutdown of one of the evaporators and the set of fans arranged in parallel with the evaporator, thereby ensuring that the air passing through the evaporator can be cooled to the target temperature and ensuring that the air supply temperature of the air-wall air conditioner is uniform.

[0148] Implementation Method 2, such as Figure 4 As shown, both evaporators are installed parallel to the two sets of fans, and the piping for the two evaporators is spaced apart. It should be noted that... Figure 4 In this embodiment, the two evaporators are spaced apart by a single pipe. In other embodiments of this application, they may also be spaced apart by multiple pipes.

[0149] In this embodiment, both evaporators are arranged in parallel with the two sets of fans, and the pipes of the two evaporators are spaced apart. When the air wall air conditioner is under low load, the liquid distribution effect of the electronic expansion valve connected to the other evaporator can be improved by controlling the closure of the electronic expansion valve connected to one of the evaporators, thereby ensuring that the air passing through the evaporators can be cooled to the target temperature and ensuring that the air supply temperature of the air wall air conditioner is uniform.

[0150] The structure of the air-wall air conditioner provided in the embodiments of this application has been described above with reference to the accompanying drawings. The control method of the air-wall air conditioner provided in the embodiments of this application will be described in detail below with reference to specific embodiments.

[0151] See Figure 5 The diagram shown is a flowchart of a control method for a wall-mounted air conditioner according to an embodiment of this application. Applied to the wall-mounted air conditioner provided in Embodiment 1, the specific implementation flow of this method is as follows: S501-S503:

[0152] S501, determine that the load of the wall air conditioner is less than the first preset threshold.

[0153] In practice, the total air volume provided by the fan can be used to measure whether the air wall air conditioner is under load. The first preset threshold can be set according to experience, for example, the first preset threshold is 40%-50% of the total air volume provided under rated operating conditions.

[0154] The total air volume provided by the fans can be calculated as follows: the relationship between fan speed and air volume provided by the fans is stored in advance, then the speed of each fan is obtained, and then the total air volume provided by the air wall air conditioner is determined based on the speed of all fans in the fan module.

[0155] In other embodiments of this application, the system flow rate can also be calculated by reading the compressor speed, suction and discharge pressure and temperature, and then combining the compressor 10 / 20 coefficient formula. The obtained flow rate is then compared with the flow rate under rated operating conditions to determine whether the air-wall air conditioner is under low load.

[0156] S502 controls the reduction of the speed of the first set of fans and the increase of the speed of the second set of fans.

[0157] In practice, when controlling the reduction of the speed of the first group of fans and the increase of the speed of the second group of fans, the initial speed of each fan is obtained. The speed of the first group of fans is reduced to the first speed, and the speed of the second group of fans is increased to the second speed. The second speed is greater than the first speed, and the sum of the air volume provided by the first group of fans at the first speed and the air volume provided by the second group of fans at the second speed is equal to the sum of the air volume provided by all fans at the initial speed. The first speed can be 10%-30% of the rated speed of the fan. For example, the first speed is 20% of the rated speed of the fan.

[0158] In practical applications, during the adjustment of fan speed, to ensure the cooling capacity provided by the fan module and prevent excessively high temperatures in the data center server room, the temperature of each fan's air supply channel and the real-time wind speed of each fan are acquired. Based on the temperature of each fan's air supply channel and the real-time wind speed of each fan, the average air supply temperature of the fan module is calculated. When the difference between the average air supply temperature and the preset target temperature is within a preset range, the speed of the first group of fans is controlled to decrease to a first speed by a first step increment, and the speed of the second group of fans is controlled to increase to a second speed by a second step increment. The first and second step increments can be set based on empirical values, and this embodiment does not limit them.

[0159] Of course, if the difference between the average supply air temperature and the preset target temperature is outside the preset range, stop adjusting the fan speed and wait until the difference between the average supply air temperature and the preset target temperature is within the preset range before continuing to adjust.

[0160] Specifically, based on the temperature of each fan's air supply channel and the real-time wind speed of each fan, the average air supply temperature of the fan module can be calculated using the following formula (1):

[0161] T=T1×Q1 / Q+T2×Q2 / Q+……+Ti×Qi / Q Formula (1)

[0162] Where T is the average supply air temperature, Ti is the temperature of the air supply channel of the i-th fan, Qi is the air volume provided by the i-th fan, which can be determined according to the real-time speed of the i-th fan, and Q is the total air volume provided by all fans.

[0163] It should be noted that during the adjustment of the fan speed, the electronic expansion valve operates according to a preset superheat control mode. The specific superheat control mode can adopt methods from related technologies, and this application embodiment does not limit this. In this application embodiment, after the speed of the second group of fans is increased to the second speed, the second group of fans operates according to the sampled speed and the actual speed through proportional-integral-differential (PID) control.

[0164] S503 controls the closure of the electronic expansion valve connected to the evaporator, which is arranged parallel to the first set of fans.

[0165] In practice, after the speed of the first set of fans is reduced to the first speed, the electronic expansion valve connected to the evaporator, which is set in parallel with the first set of fans, is closed.

[0166] In practical applications, when the wall-mounted air conditioner is operating at low load, if the load of the wall-mounted air conditioner is determined to be greater than the second preset threshold, the speed of the first set of fans is increased while the speed of the second set of fans is decreased; the electronic expansion valve connected to the evaporator, which is arranged parallel to the first set of fans, is also opened. The second preset threshold is greater than or equal to the first preset threshold; for example, the second preset threshold can be set to 50% or more of the total air volume provided under rated operating conditions, such as 70%.

[0167] Specifically, when controlling the increase of the speed of the first group of fans and the decrease of the speed of the second group of fans, the initial speeds of the first group of fans and the second group of fans are obtained respectively; the speed of the first group of fans is increased to a third speed and the speed of the second group of fans is decreased to a fourth speed, wherein the sum of the air volume provided by the first group of fans at the third speed and the air volume provided by the second group of fans at the fourth speed is equal to the sum of the air volume provided by the first group of fans and the second group of fans at the initial speed.

[0168] In practical applications, during the adjustment of fan speeds, to ensure the cooling capacity provided by the fan modules and prevent excessively high temperatures in the data center server room, the speed of the first group of fans is increased to a third speed, and the speed of the second group of fans is decreased to a fourth speed. During this process, the temperature of the air supply channels of each fan and the real-time wind speed of each fan are acquired. Based on the temperature of the air supply channels of each fan and the real-time wind speed of each fan, the average air supply temperature of the fan module is calculated. If the difference between the average air supply temperature and the preset target temperature is within a preset range, the speed of the first group of fans is increased to a third speed in a third step, and the speed of the second group of fans is decreased to a fourth speed in a fourth step. The third and fourth step sizes can be set based on empirical values, and this embodiment does not limit them. The third and fourth speeds can be the same or different.

[0169] Of course, if the difference between the average supply air temperature and the preset target temperature is outside the preset range, stop adjusting the fan speed and wait until the difference between the average supply air temperature and the preset target temperature is within the preset range before continuing to adjust.

[0170] It should be noted that, in this embodiment, after the speed of the first set of fans is increased to the third speed and the speed of the second set of fans is decreased to the fourth speed, both sets of fans operate under PID control based on the sampled speed and the actual speed. After the electronic expansion valve connected to the evaporator, which is arranged parallel to the first set of fans, is opened, the electronic expansion valve operates according to a preset superheat control mode. The specific superheat control mode can adopt methods in related technologies, and this embodiment does not limit it.

[0171] The following is combined with Figure 6 The specific implementation process of the air-wall air conditioner switching from normal load to low load in the air-wall control method provided in this application embodiment will be described. Taking the electronic expansion valve connected to the evaporator arranged parallel to the first group of fans as the first electronic expansion valve and the electronic expansion valve connected to the evaporator arranged parallel to the second group of fans as the second electronic expansion valve as an example, as follows... Figure 6 As shown, the specific implementation process of the wind wall control method provided in this application embodiment includes:

[0172] S601, the air conditioning unit is operating normally, the fan is operating based on PID control mode, and the electronic expansion valve is operating based on preset superheat control mode.

[0173] S602, determine whether the load of the air-conditioning wall is less than the first preset threshold. If yes, execute S603; otherwise, the air-conditioning wall operates normally.

[0174] S603, obtain the initial speed of each fan.

[0175] S604 controls the speed of the first group of fans to decrease by the first step size, and the speed of the second group of fans to increase by the second step size.

[0176] S605, determine whether the speed of the first group of fans has decreased to the first speed and whether the speed of the second group of fans has increased to the second speed. If yes, execute S609; otherwise, execute S606.

[0177] The first speed is 20% of the fan's rated operating speed. The sum of the air volume provided by the first group of fans at the first speed and the air volume provided by the second group of fans at the second speed is equal to the sum of the air volume provided by all fans at the initial speed.

[0178] S606 acquires the temperature of each fan's air supply channel and the real-time wind speed of each fan, and calculates the average air supply temperature of the fan module based on the temperature of each fan's air supply channel and the real-time wind speed of each fan.

[0179] S607, determine whether the difference between the average supply air temperature and the preset target temperature is within the preset range. If yes, continue to execute S604; otherwise, execute S608.

[0180] The preset target temperature can be the set temperature of the data center server room, which can be set based on experience, such as a preset target temperature of 20℃ or 15℃.

[0181] S608, stop adjusting the fan speed and continue executing S606.

[0182] S609 controls the closure of the first electronic expansion valve.

[0183] S610: The first set of fans maintains the first speed, the second set of fans operates based on PID control mode, the first electronic expansion valve is closed, and the second electronic expansion valve operates based on the preset superheat control mode.

[0184] The following is combined with Figure 7 The specific implementation process of the air-wall air conditioner switching from low load to normal load in the air-wall control method provided in this application embodiment will be described. Taking the electronic expansion valve connected to the evaporator arranged parallel to the first group of fans as the first electronic expansion valve and the electronic expansion valve connected to the evaporator arranged parallel to the second group of fans as the second electronic expansion valve as an example, as follows... Figure 7 As shown, the specific implementation process of the wind wall control method provided in this application embodiment includes:

[0185] S701, the air-conditioning wall is operating at low load. The first set of fans maintains the first speed, the second set of fans operates based on PID control mode, the first electronic expansion valve is closed, and the second electronic expansion valve operates based on the preset superheat control mode.

[0186] S702, determine whether the load of the wall air conditioner is greater than the second preset threshold. If yes, execute S703; otherwise, the wall air conditioner continues to operate at low load.

[0187] S703, obtains the starting speed of the first group of fans and the second group of fans respectively.

[0188] S704 controls the speed of the first set of fans to increase by a third step, and the speed of the second set of fans to decrease by a fourth step, controls the opening of the first electronic expansion valve, and both the first electronic expansion valve and the second electronic expansion valve operate based on a preset superheat control mode.

[0189] S705, determine whether the speed of the first group of fans has increased to the third speed and whether the speed of the second group of fans has decreased to the fourth speed.

[0190] The sum of the air volume provided by the first group of fans at the third speed and the air volume provided by the second group of fans at the fourth speed is equal to the sum of the air volume provided by the first group of fans and the second group of fans at the initial speed. The third speed and the fourth speed are the same.

[0191] S706 acquires the temperature of each fan's air supply channel and the real-time wind speed of each fan, and calculates the average air supply temperature of the fan module based on the temperature of each fan's air supply channel and the real-time wind speed of each fan.

[0192] S707: Determine whether the difference between the average supply air temperature and the preset target temperature is within the preset range. If yes, continue to execute S704; otherwise, execute S708.

[0193] S708, stop adjusting the fan speed and continue executing S706.

[0194] S709, the first and second sets of fans operate based on PID control mode, and the first and second electronic expansion valves operate based on preset superheat control mode.

[0195] See Figure 8 The diagram shown is a flowchart of a control method for a wall-mounted air conditioner according to an embodiment of this application. Applied to the wall-mounted air conditioner provided in Embodiment 2, the specific implementation flow of this method is as follows: S801-S802:

[0196] S801, determine that the load of the wall air conditioner is less than the third preset threshold.

[0197] In practice, the total air volume provided by the fan can be used to measure whether the air wall air conditioner is under load. The third preset threshold can be set according to experience. For example, the third preset threshold is 40%-50% of the total air volume provided under rated operating conditions.

[0198] The total air volume provided by the fans can be calculated as follows: the relationship between fan speed and air volume provided by the fans is stored in advance, then the speed of each fan is obtained, and then the total air volume provided by the air wall air conditioner is determined based on the speed of all fans in the fan module.

[0199] In other embodiments of this application, the system flow rate can also be calculated by reading the compressor speed, suction and discharge pressure and temperature, and then combining the compressor 10 / 20 coefficient formula. The obtained flow rate is then compared with the flow rate under rated operating conditions to determine whether the air-wall air conditioner is under low load.

[0200] S802 controls the closure of the first electronic expansion valve and controls the increase of the opening of the second electronic expansion valve.

[0201] Specifically, when controlling the increase in the opening degree of the second electronic expansion valve, the initial opening degrees of the first and second electronic expansion valves are obtained respectively; the opening degree of the first electronic expansion valve is controlled to close by a first set step, and the opening degree of the second electronic expansion valve is controlled to increase to the first opening degree by a second set step. The first opening degree is equal to the product of the sum of the initial opening degrees of the first and second electronic expansion valves and a first preset coefficient. The first set step, the second set step, and the first preset coefficient can be set based on empirical values.

[0202] In practical applications, during the adjustment of the electronic expansion valve opening, in order to ensure the cooling capacity provided by the air wall air conditioner and prevent the temperature in the data center server room from becoming too high, the suction superheat of the second electronic expansion valve is obtained. When the suction superheat is less than a preset safety threshold, the second electronic expansion valve is controlled to switch to a preset superheat control mode. The preset safety threshold can be set based on empirical values, such as a preset safety threshold of 6K.

[0203] In practical applications, when the air-wall air conditioner is running at low load, if it is determined that the load of the air-wall air conditioner is greater than the fourth preset threshold, the first electronic expansion valve will be opened and the opening degree of the second electronic expansion valve will be reduced.

[0204] Among them, the fourth preset threshold is greater than or equal to the third preset threshold. For example, the fourth preset threshold can be set to 50% or more of the total air volume provided under rated operating conditions, such as 70%.

[0205] Specifically, when controlling the opening of the first electronic expansion valve and reducing the opening of the second electronic expansion valve, the initial opening of the first electronic expansion valve and the second electronic expansion valve are obtained respectively. The first electronic expansion valve is controlled to open to the second opening by a third set step, and the second electronic expansion valve is controlled to close to the second opening by a fourth set step.

[0206] The second opening degree is equal to the product of the average of the initial opening degrees of the first and second electronic expansion valves and the second preset coefficient. The second preset coefficient, the third setting step, and the fourth setting step can all be set based on empirical values.

[0207] In practical applications, during the adjustment of the opening of the electronic expansion valve, in order to ensure the cooling capacity provided by the air wall air conditioner and avoid excessively high temperatures in the data center computer room, the suction superheat of the first electronic expansion valve is obtained. When the suction superheat is less than the preset safety threshold, the first electronic expansion valve is controlled to switch to the preset superheat control mode.

[0208] The following is combined with Figure 9The specific implementation process of the air-wall air conditioner switching from normal load to low load in the air-wall control method provided in the embodiments of this application will be described, such as... Figure 9 As shown, the specific implementation process of the wind wall control method provided in this application embodiment includes:

[0209] S901, the air conditioning unit is operating normally, the fan is operating based on PID control mode, and the electronic expansion valve is operating based on preset superheat control mode.

[0210] S902, determine whether the load of the wall air conditioner is less than the third preset threshold. If yes, execute S903; otherwise, the wall air conditioner operates normally.

[0211] S903, obtain the initial opening degree of the first electronic expansion valve and the second electronic expansion valve respectively.

[0212] S904, control the opening of the first electronic expansion valve to close by a first set step, and control the opening of the second electronic expansion valve to increase by a second set step.

[0213] S905, obtain the intake superheat of the second electronic expansion valve.

[0214] S906, determine whether the intake superheat of the second electronic expansion valve is less than the preset safety threshold. If yes, execute S908; otherwise, execute S907.

[0215] S907: Determine whether the opening degree of the second electronic expansion valve has reached the first opening degree. If yes, execute S908; otherwise, execute S904.

[0216] The first opening degree is equal to the product of the sum of the initial opening degrees of the first electronic expansion valve and the second electronic expansion valve and the first preset coefficient.

[0217] S908, the air-conditioning unit operates at low load, with the first and second sets of fans operating in PID control mode, the first electronic expansion valve closed, and the second electronic expansion valve operating in a preset superheat control mode.

[0218] The following is combined with Figure 10 The specific implementation process of the air-wall air conditioner switching from low load to normal load in the air-wall control method provided in the embodiments of this application will be described, such as... Figure 10 As shown, the specific implementation process of the wind wall control method provided in this application embodiment includes:

[0219] S1001, the air conditioning unit is operating at low load. The first and second sets of fans are operating based on PID control mode. The first electronic expansion valve is closed, and the second electronic expansion valve is operating based on the preset superheat control mode.

[0220] S1002, determine whether the load of the wall air conditioner is greater than the fourth preset threshold. If yes, execute S1003; otherwise, the wall air conditioner continues to operate at low load.

[0221] S1003, obtain the initial opening degree of the first electronic expansion valve and the second electronic expansion valve respectively.

[0222] S1004, control the opening of the first electronic expansion valve to increase by a third set step, and control the opening of the second electronic expansion valve to decrease by a fourth set step.

[0223] S1005, obtain the intake superheat of the first electronic expansion valve.

[0224] S1006, determine whether the intake superheat of the first electronic expansion valve is less than the preset safety threshold. If yes, execute S1008; otherwise, execute S1007.

[0225] S1007: Determine whether the opening degree of the first electronic expansion valve and the second electronic expansion valve has reached the second opening degree. If yes, execute S1008; otherwise, execute S1004.

[0226] The second opening degree is equal to the product of the average of the initial opening degrees of the first electronic expansion valve and the second electronic expansion valve and the second preset coefficient.

[0227] S1008, the air conditioning unit is operating normally, the fan is operating based on PID control mode, and the electronic expansion valve is operating based on preset superheat control mode.

[0228] Based on the same concept, this application also provides a control device for a wind wall air conditioner. The principle of the device in solving the problem is similar to that of the method described above. The implementation of the device can refer to the implementation of the method, and the repeated parts will not be described again.

[0229] like Figure 11 As shown in the figure, this application embodiment provides a control device for a wall-mounted air conditioner, the device comprising:

[0230] Processing unit 1101 is used to determine that the load of the air-wall air conditioner is less than a first preset threshold.

[0231] The first control unit 1102 is used to control the reduction of the speed of the first group of fans and the increase of the speed of the second group of fans;

[0232] The second control unit 1103 is used to control the closure of the electronic expansion valve connected to the evaporator, which is arranged parallel to the first set of fans.

[0233] In one possible implementation, the first control unit 1102 is specifically used for:

[0234] Obtain the initial speed of each fan;

[0235] Control the speed of the first group of fans to decrease to the first speed, and increase the speed of the second group of fans to the second speed. The second speed is greater than the first speed, and the sum of the air volume provided by the first group of fans at the first speed and the air volume provided by the second group of fans at the second speed is equal to the sum of the air volume provided by all fans at the initial speed.

[0236] In one possible implementation, the first control unit 1102 is specifically used for:

[0237] Obtain the temperature of each fan's air supply channel and the real-time wind speed of each fan;

[0238] The average air supply temperature of the fan module is calculated based on the temperature of each fan's air supply channel and the real-time wind speed of each fan.

[0239] When the difference between the average supply air temperature and the preset target temperature is within the preset range, the speed of the first set of fans is reduced to the first speed by the first step, and the speed of the second set of fans is increased to the second speed by the second step.

[0240] In one possible implementation, the processing unit 1101 is further configured to: determine that the load of the air-wall air conditioner is greater than a second preset threshold, wherein the second preset threshold is greater than or equal to a first preset threshold.

[0241] The first control unit 1102 is also used to: control the increase of the speed of the first group of fans and the decrease of the speed of the second group of fans;

[0242] The second control unit 1103 is also used to: control the opening of the electronic expansion valve connected to the evaporator that is arranged parallel to the first set of fans.

[0243] In one possible implementation, the first control unit 1102 is specifically used for:

[0244] The initial speeds of the first and second groups of fans were obtained respectively;

[0245] The speed of the first set of fans is increased to the third speed, and the speed of the second set of fans is decreased to the fourth speed. The sum of the air volume provided by the first set of fans at the third speed and the air volume provided by the second set of fans at the fourth speed is equal to the sum of the air volume provided by the first set of fans and the second set of fans at the initial speed.

[0246] In one possible implementation, the first control unit 1102 is specifically used for:

[0247] Obtain the temperature of each fan's air supply channel and the real-time wind speed of each fan;

[0248] The average air supply temperature of the fan module is calculated based on the temperature of each fan's air supply channel and the real-time wind speed of each fan.

[0249] When the difference between the average supply air temperature and the preset target temperature is within the preset range, the speed of the first group of fans is increased to the third speed in the third step, and the speed of the second group of fans is decreased to the fourth speed in the fourth step.

[0250] In one possible implementation, the first control unit 1102 is specifically used for:

[0251] The average supply air temperature of the fan module is calculated using the following formula:

[0252] T=T1×Q1 / Q+T2×Q2 / Q+……+Ti×Qi / Q Formula 1

[0253] Where T is the average supply air temperature, Ti is the temperature of the air supply channel of the i-th fan, Qi is the air volume provided by the i-th fan, which can be determined according to the real-time speed of the i-th fan, and Q is the total air volume provided by all fans.

[0254] Based on the same concept, this application also provides another control device for a wind wall air conditioner. The principle of this device in solving the problem is similar to that of the method described above. The implementation of the device can refer to the implementation of the method, and the repeated parts will not be described again.

[0255] like Figure 12 As shown in the figure, this application embodiment provides a control device for a wall-mounted air conditioner, the device comprising:

[0256] Processing unit 1201 is used to determine that the load of the air-wall air conditioner is less than a third preset threshold.

[0257] The control unit 1202 is used to control the closure of the first electronic expansion valve and to control the increase of the opening of the second electronic expansion valve.

[0258] In one possible implementation, the control unit 1202 is specifically used for:

[0259] The initial opening degrees of the first electronic expansion valve and the second electronic expansion valve are obtained respectively;

[0260] The opening of the first electronic expansion valve is controlled to close by a first set step, and the opening of the second electronic expansion valve is controlled to increase to the first opening by a second set step, wherein the first opening is equal to the product of the sum of the initial openings of the first and second electronic expansion valves and a first preset coefficient.

[0261] In one possible implementation, the control unit 1202 is further configured to:

[0262] When the opening degree of the second electronic expansion valve is increased to the first opening degree, the intake superheat of the second electronic expansion valve is obtained;

[0263] When the intake superheat is less than the preset safety threshold, the second electronic expansion valve is switched to the preset superheat control mode.

[0264] In one possible implementation, the processing unit 1201 is further configured to: determine that the load of the air-wall air conditioner is greater than a fourth preset threshold, wherein the fourth preset threshold is greater than or equal to a third preset threshold.

[0265] The control unit 1202 is also used to: control the opening of the first electronic expansion valve and reduce the opening degree of the second electronic expansion valve.

[0266] In one possible implementation, the control unit 1202 is specifically used for:

[0267] The initial opening degrees of the first electronic expansion valve and the second electronic expansion valve are obtained respectively.

[0268] The first electronic expansion valve is controlled to open to the second opening degree by a third preset step, and the second electronic expansion valve is controlled to close to the second opening degree by a fourth preset step, wherein the second opening degree is equal to the product of the average value of the initial opening degree of the first electronic expansion valve and the second electronic expansion valve and a second preset coefficient.

[0269] In one possible implementation, the control unit 1202 is further configured to:

[0270] When the first electronic expansion valve is opened to the second opening degree, the intake superheat of the first electronic expansion valve is obtained;

[0271] When the intake superheat is less than the preset safety threshold, the first electronic expansion valve is switched to the preset superheat control mode.

[0272] Based on the same concept, this application also provides an electronic device. The principle of the device in solving the problem is similar to that of the method described above. The implementation of the device can refer to the implementation of the method, and the repeated parts will not be described again.

[0273] like Figure 13 As shown, an electronic device provided in an embodiment of this application includes: a processor 1301; and a memory 1302 for storing executable instructions of the processor 1301; wherein the processor 1301 performs the following steps by executing the executable instructions:

[0274] Determine that the load on the air-supported wall air conditioner is less than the first preset threshold;

[0275] Control the speed of the first set of fans to decrease and increase the speed of the second set of fans;

[0276] Control the closure of the electronic expansion valve connected to the evaporator, which is set parallel to the first set of fans.

[0277] In one possible implementation, processor 1301 is specifically configured to execute:

[0278] Obtain the initial speed of each fan;

[0279] Control the speed of the first group of fans to decrease to the first speed, and increase the speed of the second group of fans to the second speed. The second speed is greater than the first speed, and the sum of the air volume provided by the first group of fans at the first speed and the air volume provided by the second group of fans at the second speed is equal to the sum of the air volume provided by all fans at the initial speed.

[0280] In one possible implementation, processor 1301 is specifically configured to execute:

[0281] Obtain the temperature of each fan's air supply channel and the real-time wind speed of each fan;

[0282] The average air supply temperature of the fan module is calculated based on the temperature of each fan's air supply channel and the real-time wind speed of each fan.

[0283] When the difference between the average supply air temperature and the preset target temperature is within the preset range, the speed of the first set of fans is reduced to the first speed by the first step, and the speed of the second set of fans is increased to the second speed by the second step.

[0284] In one possible implementation, the processor 1301 is further configured to perform: determining that the load of the air-wall air conditioner is greater than a second preset threshold, the second preset threshold being greater than or equal to a first preset threshold;

[0285] Control the speed of the first set of fans to increase and the speed of the second set of fans to decrease;

[0286] Control the opening of the electronic expansion valve connected to the evaporator, which is set parallel to the first set of fans.

[0287] In one possible implementation, processor 1301 is specifically configured to execute:

[0288] The initial speeds of the first and second groups of fans were obtained respectively;

[0289] The speed of the first set of fans is increased to the third speed, and the speed of the second set of fans is decreased to the fourth speed. The sum of the air volume provided by the first set of fans at the third speed and the air volume provided by the second set of fans at the fourth speed is equal to the sum of the air volume provided by the first set of fans and the second set of fans at the initial speed.

[0290] In one possible implementation, processor 1301 is specifically configured to execute:

[0291] Obtain the temperature of each fan's air supply channel and the real-time wind speed of each fan;

[0292] The average air supply temperature of the fan module is calculated based on the temperature of each fan's air supply channel and the real-time wind speed of each fan.

[0293] When the difference between the average supply air temperature and the preset target temperature is within the preset range, the speed of the first group of fans is increased to the third speed in the third step, and the speed of the second group of fans is decreased to the fourth speed in the fourth step.

[0294] In one possible implementation, processor 1301 is specifically configured to execute:

[0295] The average supply air temperature of the fan module is calculated using the following formula:

[0296] T=T1×Q1 / Q+T2×Q2 / Q+……+Ti×Qi / Q Formula 1

[0297] Where T is the average supply air temperature, Ti is the temperature of the air supply channel of the i-th fan, Qi is the air volume provided by the i-th fan, which can be determined according to the real-time speed of the i-th fan, and Q is the total air volume provided by all fans.

[0298] Based on the same concept, this application also provides an electronic device. The principle of the device in solving the problem is similar to that of the method described above. The implementation of the device can refer to the implementation of the method, and the repeated parts will not be described again.

[0299] like Figure 14 As shown, an electronic device provided in an embodiment of this application includes: a processor 1401; and a memory 1402 for storing executable instructions of the processor 1401; wherein the processor 1401 performs the following steps by running the executable instructions:

[0300] Determine that the load on the air-conditioner is less than the third preset threshold;

[0301] Control the closure of the first electronic expansion valve and control the increase of the opening of the second electronic expansion valve.

[0302] In one possible implementation, processor 1401 is specifically configured to perform:

[0303] The initial opening degrees of the first electronic expansion valve and the second electronic expansion valve are obtained respectively;

[0304] The opening of the first electronic expansion valve is controlled to close by a first set step, and the opening of the second electronic expansion valve is controlled to increase to the first opening by a second set step, wherein the first opening is equal to the product of the sum of the initial openings of the first and second electronic expansion valves and a first preset coefficient.

[0305] In one possible implementation, processor 1401 is also configured to perform:

[0306] When the opening degree of the second electronic expansion valve is increased to the first opening degree, the intake superheat of the second electronic expansion valve is obtained;

[0307] When the intake superheat is less than the preset safety threshold, the second electronic expansion valve is switched to the preset superheat control mode.

[0308] In one possible implementation, the processor 1401 is further configured to perform: determining that the load of the air-wall air conditioner is greater than a fourth preset threshold, the fourth preset threshold being greater than or equal to a third preset threshold.

[0309] The control opens the first electronic expansion valve and reduces the opening of the second electronic expansion valve.

[0310] In one possible implementation, processor 1401 is specifically configured to perform:

[0311] The initial opening degrees of the first electronic expansion valve and the second electronic expansion valve are obtained respectively.

[0312] The first electronic expansion valve is controlled to open to the second opening degree by a third preset step, and the second electronic expansion valve is controlled to close to the second opening degree by a fourth preset step, wherein the second opening degree is equal to the product of the average value of the initial opening degree of the first electronic expansion valve and the second electronic expansion valve and a second preset coefficient.

[0313] In one possible implementation, processor 1401 is specifically configured to perform:

[0314] When the first electronic expansion valve is opened to the second opening degree, the intake superheat of the first electronic expansion valve is obtained;

[0315] When the intake superheat is less than the preset safety threshold, the first electronic expansion valve is switched to the preset superheat control mode.

[0316] Based on the same inventive concept, this disclosure provides a computer storage medium comprising: computer program code, which, when executed on a computer, causes the computer to perform any of the control methods for a wall-mounted air conditioner discussed above. Since the principle by which the computer storage medium solves the problem is similar to the control method for a wall-mounted air conditioner, the implementation of the computer storage medium can be found in the implementation of the method, and repeated details will not be elaborated further.

[0317] In specific implementation, computer storage media can include: Universal Serial Bus Flash Drive (USB), portable hard drive, Read-Only Memory (ROM), Random Access Memory (RAM), magnetic disk or optical disk, and other storage media that can store program code.

[0318] Based on the same inventive concept, this disclosure also provides a computer program product, which includes computer program code. When the computer program code is run on a computer, it causes the computer to execute any of the control methods for a wall-mounted air conditioner discussed above. Since the principle by which the above-described computer program product solves the problem is similar to that of the control method for a wall-mounted air conditioner, the implementation of the above-described computer program product can be referred to the implementation of the method, and repeated details will not be described again.

[0319] Computer program products may employ any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0320] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0321] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 Devices that specify the functions in one or more boxes.

[0322] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including an instruction device, which is implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0323] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the functions specified in one or more boxes. Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, this application also intends to include such modifications and variations if they fall within the scope of the claims of this application and their equivalents.

Claims

1. A wall-mounted air conditioner, characterized in that, include: The system comprises a fan module, a compressor, a condenser, two evaporators, and electronic expansion valves connected to the two evaporators respectively. The fan module includes two sets of fans, each set including multiple fans. The fans in the fan module are arranged on the same plane, and a partition is provided between adjacent fans. The two evaporators are connected in parallel between the compressor and the condenser, and each evaporator is arranged in parallel with at least one set of fans.

2. The air-wall air conditioner according to claim 1, characterized in that, The two evaporators are each arranged in parallel with a set of fans.

3. The air-conditioning wall according to claim 1, characterized in that, Both evaporators are arranged in parallel with the two sets of fans, and the pipes of the two evaporators are spaced apart.

4. A control method for a wall-mounted air conditioner, applied to the wall-mounted air conditioner as described in claim 2, characterized in that, The method includes: Determine that the load of the air-conditioner is less than a first preset threshold; Control the speed of the first set of fans to decrease and increase the speed of the second set of fans; Control the closure of the electronic expansion valve connected to the evaporator, which is arranged parallel to the first set of fans.

5. The method according to claim 4, characterized in that, The control to reduce the speed of the first group of fans and increase the speed of the second group of fans includes: Obtain the initial speed of each fan; The speed of the first group of fans is reduced to a first speed, and the speed of the second group of fans is increased to a second speed, wherein the second speed is greater than the first speed, and the sum of the air volume provided by the first group of fans at the first speed and the air volume provided by the second group of fans at the second speed is equal to the sum of the air volume provided by all fans at the initial speed.

6. The method according to claim 5, characterized in that, The control to reduce the speed of the first group of fans to a first speed and increase the speed of the second group of fans to a second speed includes: Obtain the temperature of each fan's air supply channel and the real-time wind speed of each fan; The average air supply temperature of the fan module is calculated based on the temperature of the air supply channels of each fan and the real-time wind speed of each fan. When the difference between the average supply air temperature and the preset target temperature is within a preset range, the speed of the first set of fans is controlled to decrease to the first speed by a first step, and the speed of the second set of fans is increased to the second speed by a second step.

7. The method according to claim 4, characterized in that, The method further includes: The load of the air-conditioner is determined to be greater than a second preset threshold, wherein the second preset threshold is greater than or equal to the first preset threshold; Control the speed of the first set of fans to increase and the speed of the second set of fans to decrease; The electronic expansion valve connected to the evaporator, which is arranged parallel to the first set of fans, is controlled to open.

8. The method according to claim 7, characterized in that, The control to increase the speed of the first group of fans and decrease the speed of the second group of fans includes: The initial rotational speeds of the first group of fans and the second group of fans were obtained respectively; The speed of the first set of fans is increased to a third speed, and the speed of the second set of fans is decreased to a fourth speed. The sum of the air volume provided by the first set of fans at the third speed and the air volume provided by the second set of fans at the fourth speed is equal to the sum of the air volume provided by the first set of fans and the second set of fans at the initial speed.

9. The method according to claim 8, characterized in that, The control to increase the speed of the first group of fans to a third speed and decrease the speed of the second group of fans to a fourth speed includes: Obtain the temperature of each fan's air supply channel and the real-time wind speed of each fan; The average air supply temperature of the fan module is calculated based on the temperature of the air supply channels of each fan and the real-time wind speed of each fan. When the difference between the average supply air temperature and the preset target temperature is within a preset range, the speed of the first group of fans is increased to the third speed in a third step, and the speed of the second group of fans is decreased to the fourth speed in a fourth step.

10. A control method for a wall-mounted air conditioner, applied to the wall-mounted air conditioner as described in claim 3, characterized in that, The method includes: Determine that the load of the air-conditioner is less than a third preset threshold; Control the closure of the first electronic expansion valve and control the increase of the opening of the second electronic expansion valve.

11. The method according to claim 10, characterized in that, The control to close the first electronic expansion valve and control to increase the opening of the second electronic expansion valve includes: The initial opening degrees of the first electronic expansion valve and the second electronic expansion valve are obtained respectively; The opening of the first electronic expansion valve is controlled to close by a first set step, and the opening of the second electronic expansion valve is controlled to increase to a first opening by a second set step, wherein the first opening is equal to the product of the sum of the initial openings of the first and second electronic expansion valves and a first preset coefficient.

12. The method according to claim 11, characterized in that, The method further includes: When the opening degree of the second electronic expansion valve is increased to the first opening degree, the intake superheat of the second electronic expansion valve is obtained; When the intake superheat is less than a preset safety threshold, the second electronic expansion valve is controlled to switch to a preset superheat control mode.

13. The method according to claim 10, characterized in that, The method further includes: The load of the air-conditioner is determined to be greater than a fourth preset threshold, wherein the fourth preset threshold is greater than or equal to the third preset threshold; The control opens the first electronic expansion valve and reduces the opening degree of the second electronic expansion valve.

14. The method according to claim 13, characterized in that, The control to open the first electronic expansion valve and reduce the opening of the second electronic expansion valve includes: The initial opening degree of the first electronic expansion valve and the second electronic expansion valve are obtained respectively; The first electronic expansion valve is controlled to open to the second opening degree by a third preset step, and the second electronic expansion valve is controlled to close to the second opening degree by a fourth preset step, wherein the second opening degree is equal to the product of the average value of the initial opening degree of the first electronic expansion valve and the second electronic expansion valve and a second preset coefficient.

15. The method according to claim 14, characterized in that, The method further includes: When the first electronic expansion valve is opened to the second opening degree, the intake superheat of the first electronic expansion valve is obtained; When the intake superheat is less than a preset safety threshold, the first electronic expansion valve is controlled to switch to a preset superheat control mode.

16. A control device for a wall-mounted air conditioner, applied to the wall-mounted air conditioner as described in claim 2, characterized in that, The device includes: The processing unit is used to determine that the load of the air-wall air conditioner is less than a first preset threshold. The first control unit is used to control the reduction of the speed of the first set of fans and the increase of the speed of the second set of fans; The second control unit is used to control the closure of the electronic expansion valve connected to the evaporator, which is arranged parallel to the first set of fans.

17. The apparatus according to claim 16, characterized in that, The processing unit is further configured to: determine that the load of the air-conditioning wall is greater than a second preset threshold, wherein the second preset threshold is greater than or equal to the first preset threshold; The first control unit is also used to: control the increase of the speed of the first group of fans and the decrease of the speed of the second group of fans; The second control unit is also used to: control the opening of the electronic expansion valve connected to the evaporator that is arranged parallel to the first set of fans.

18. A control device for a wall-mounted air conditioner, applied to the wall-mounted air conditioner as described in claim 3, characterized in that, The device includes: The processing unit is used to determine that the load of the air-conditioning wall is less than a third preset threshold. The control unit is used to control the closure of the first electronic expansion valve and to control the increase of the opening of the second electronic expansion valve.

19. The apparatus according to claim 18, characterized in that, The processing unit is further configured to: determine that the load of the air-wall air conditioner is greater than a fourth preset threshold, wherein the fourth preset threshold is greater than or equal to the third preset threshold; The control unit is also used to: control the opening of the first electronic expansion valve and reduce the opening degree of the second electronic expansion valve.

20. An electronic device, characterized in that, include: processor; A memory for storing processor-executable instructions; wherein the processor implements the steps of the method according to any one of claims 4-15 by executing the executable instructions.

21. A computer storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps of the method as described in any one of claims 4-15.

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