Method and device for determining fan adaptive to environmental test box

Abstract

The invention discloses a method and a device for determining a fan adaptive to an environmental test box. The draught fan determining method comprises the steps that multiple draught fans of different specifications and multiple first resistance components are selected; determining first resistance generated by each first resistance component under the fan of each specification in the simulation environment test box; according to the first resistance corresponding to each first resistance component under the fan of each specification, determining estimated wind field resistance when the set environment test box comprises at least one second resistance component; and determining a fan adaptive to the set environment test box according to the estimated wind field resistance. The invention provides a method and a device for determining a fan adaptive to an environmental test box, which can more accurately determine the wind field resistance in the environmental test box, so that the fan required by the environmental test box can be more accurately determined, energy waste caused by overlarge air volume is avoided, and the energy consumption is reduced. And the problem that the environmental test box cannot meet the test requirements due to insufficient air volume is also avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental testing equipment, and in particular to a method and a device for determining a fan adapted to an environmental testing chamber. Background Art

[0002] Environmental test chambers are testing equipment used to simulate natural climate environments. They can simulate a variety of environmental conditions such as high temperature, low temperature, humidity, light, rain, ozone, steam, salt spray, and dust. There are many types of environmental test chambers, including but not limited to high and low temperature test chambers, constant temperature and humidity test chambers, hot and cold shock test chambers, and salt spray test chambers. These test chambers can help test the performance stability of products in extreme environments, thereby improving product quality.

[0003] Currently, the selection of fans for environmental test chambers is mainly based on empirical values ​​to estimate the wind field resistance in an environmental test chamber, and the fan selection is carried out according to the value to match the fan air volume, or a high-power fan is forcibly used to meet the target demand.

[0004] The method of estimating wind field resistance based on empirical values ​​and then selecting fans is likely to result in insufficient air volume in the environmental test chamber or excessive air volume margin. Insufficient air volume will lead to problems such as reduced heating and cooling rates in the environmental test chamber and liquid return in the compressor. Excessive air volume margin will cause unnecessary energy loss and cost increase. In addition, the forced use of high-power fans will generally result in low fan efficiency and energy conservation. Summary of the invention

[0005] The present invention provides a method and device for determining a fan suitable for an environmental test chamber, which can more accurately determine the wind field resistance in the environmental test chamber, thereby more accurately determining the fan required for the environmental test chamber, avoiding energy waste caused by excessive air volume, and avoiding the problem that the environmental test chamber cannot meet the test requirements due to insufficient air volume.

[0006] According to one aspect of the present invention, a method for determining a fan suitable for an environmental test chamber is provided, the method comprising:

[0007] Selecting a plurality of fans of different specifications and a plurality of first resistance components;

[0008] Determine the first resistance generated by each of the first resistance components under each specification of the fan in the simulated environmental test chamber;

[0009] Determine the estimated wind field resistance when the environmental test box is set to include at least one second resistance component according to the first resistance corresponding to each first resistance component under each specification of the wind turbine; wherein the function of the second resistance component is the same as the function of at least one of the first resistance components among the plurality of the first resistance components;

[0010] A fan adapted to the set environmental test chamber is determined according to the estimated wind field resistance.

[0011] Optionally, determining the first resistance generated by each of the first resistance components under each specification of the fan in the simulated environmental test chamber includes:

[0012] Determine a first resistance generated by each of the first resistance components under a fan of current specifications in the simulated environmental test chamber;

[0013] Detecting whether the first resistance generated by each of the first resistance components under each specification of the fan in the simulated environmental test chamber is determined;

[0014] If not, the specification of the fan in the simulated environmental test chamber is changed, and then the process returns to the step of determining the first resistance generated by each first resistance component under a fan of current specification in the simulated environmental test chamber.

[0015] Optionally, the simulated environmental test chamber includes a chamber body and a chamber door;

[0016] The determining of the first resistance generated by each of the first resistance components under a fan of current specifications in the simulated environmental test chamber includes:

[0017] Determine the corresponding relationship between the static pressure and the current of the fan of the current specification located outside the box;

[0018] Determine a first output current when the fan of current specifications is located in the box and the box door is open and the fan is in a stable state;

[0019] Determine a second output current when the fan of current specifications and a current first resistance component are located in the box and the box door is open, and the fan is in a stable state;

[0020] Determine the first resistance generated by the current first resistance component under the fan of the current specification according to the corresponding relationship between the static pressure and the current, the first output current and the second output current;

[0021] Detecting whether the first resistance generated by each of the first resistance components under the fan of the current specification in the box is determined;

[0022] If not, replace the first resistance component in the box body, and then return to the step of determining the second output current of the fan of the current specification and the current first resistance component is located in the box body and the box door is open, and the fan is in a stable state.

[0023] Optionally, determining the correspondence between the static pressure and the current of the fan of current specifications located outside the box includes:

[0024] Under the set temperature value, determining the corresponding relationship between the static pressure and the current of the fan of the current specification located outside the box;

[0025] The determining of the first output current when the fan of the current specification is located in the box and the box door is open and the fan is in a stable state includes:

[0026] When the temperature in the box is the set temperature value, determining that the fan of the current specification is located in the box and the box door is open, and the fan is in a first output current in a stable state;

[0027] The second output current when the fan of the current specification and a current first resistance component are located in the box and the box door is open and the fan is in a stable state includes:

[0028] When the temperature in the box is the set temperature value, determine the second output current of the fan of the current specification and a current first resistance component located in the box and the box door is open, and the fan is in a stable state.

[0029] Optionally, determining the first resistance generated by the current first resistance component under the fan of current specifications according to the corresponding relationship between the static pressure and the current, the first output current, and the second output current includes:

[0030] Determining a first static pressure resistance corresponding to the fan of current specifications according to the correspondence between the static pressure and the current and the first output current;

[0031] Determine, according to the correspondence between the static pressure and the current and the second output current, the second static pressure resistance corresponding to the current first resistance component under the fan of the current specification;

[0032] The first resistance generated by the current first resistance component under the fan of the current specification is determined according to the first static pressure resistance and the second static pressure resistance.

[0033] Optionally, determining the first resistance generated by the current first resistance component under the fan of the current specification according to the first static pressure resistance and the second static pressure resistance includes:

[0034] The difference between the second static pressure resistance and the first static pressure resistance is used as the first resistance.

[0035] Optionally, the step of determining the estimated wind field resistance when the environmental test chamber includes at least one second resistance component according to the first resistance corresponding to each first resistance component under each specification of the wind turbine includes:

[0036] Establishing a wind resistance database according to each of the first resistance components, fans of different specifications and each of the first resistances;

[0037] The estimated wind field resistance when the set environmental test box includes at least one second resistance component is determined according to the wind resistance database and the at least one second resistance component.

[0038] Optionally, determining a fan adapted to set the environmental test box according to the estimated wind field resistance includes:

[0039] Determining the required air volume of the set environmental test chamber;

[0040] Obtain the corresponding relationship between static pressure and air volume for each specification of fan;

[0041] A fan adapted to the set environmental test chamber is determined according to the estimated wind field resistance, the corresponding relationship between the static pressure and the air volume, and the required air volume.

[0042] Optionally, the plurality of first resistance components include an air duct plate, a return air mesh port, a heater, a humidifier, and a plurality of evaporators of different specifications, wherein the evaporators of different specifications have different sizes;

[0043] And / or, the specifications of the simulated environmental test chamber are the same as the specifications of the set environmental test chamber.

[0044] According to another aspect of the present invention, a fan determination device adapted to an environmental test chamber is provided, the fan determination device comprising a selection module, a component resistance determination module, a wind field resistance determination module and a fan determination module;

[0045] The selection module is used to select a plurality of fans of different specifications and a plurality of first resistance components;

[0046] The component resistance determination module is used to determine the first resistance generated by each of the first resistance components under each specification of the fan in the simulated environmental test chamber;

[0047] The wind field resistance determination module is used to determine the estimated wind field resistance when the environmental test box is set to include at least one second resistance component according to the first resistance corresponding to each first resistance component under each specification of the wind turbine; wherein the function of the second resistance component is the same as the function of at least one of the first resistance components among the plurality of the first resistance components;

[0048] The fan determination module is used to determine a fan that is suitable for setting the environmental test box according to the estimated wind field resistance.

[0049] An embodiment of the present invention provides a method for determining a fan that is suitable for an environmental test chamber, the method comprising: first selecting a plurality of fans of different specifications and a plurality of first resistance components, then determining the first resistance generated by each first resistance component under each specification of the fan in the simulated environmental test chamber, then determining the estimated wind field resistance when the set environmental test chamber includes at least one second resistance component based on the first resistance corresponding to each first resistance component under each specification of the fan, and finally determining the fan that is suitable for the set environmental test chamber based on the estimated wind field resistance. The embodiment of the present invention determines the first resistance generated by each first resistance component under the same specification of the fan, and also determines the first resistance generated by the same first resistance component under multiple fans of different specifications, thereby increasing the number of first resistances and improving the accuracy of determining the estimated wind field resistance based on multiple first resistances and the first resistance components corresponding to the first resistances. In addition, the function of the second resistance component in the set environmental test box is the same as that of the first resistance component, so that the estimated wind field resistance in the set environmental test box can be determined more accurately based on the first resistance corresponding to the first resistance component, and the air volume determined based on the estimated wind field resistance is more accurate. Finally, the fan selection is completed based on the wind volume, so that the air volume generated by the selected fan can be matched with the air volume required by the set environmental test box. In summary, the method for determining the fan adapted to the environmental test box provided in the embodiment of the present invention can more accurately determine the wind field resistance in the environmental test box, and thus can more accurately determine the fan required for the environmental test box, avoiding energy waste caused by excessive air volume, and also avoiding the problem that the environmental test box cannot meet the test requirements due to insufficient air volume.

[0050] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0052] Figure 1 is a structural schematic diagram of an environmental test chamber provided according to an embodiment of the present invention;

[0053] Figure 2 It is a flow chart of a method for determining a fan suitable for an environmental test chamber provided in accordance with an embodiment of the present invention;

[0054] Figure 3It is a flow chart of another method for determining a fan suitable for an environmental test chamber provided according to an embodiment of the present invention;

[0055] Figure 4 It is a flow chart of another method for determining a fan suitable for an environmental test chamber provided according to an embodiment of the present invention;

[0056] Figure 5 It is a structural schematic diagram of a fan determination device adapted to an environmental test chamber provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0057] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0058] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0059] Figure 1 is a schematic diagram of the structure of an environmental test chamber provided according to an embodiment of the present invention, with reference to Figure 1The environmental test box provided in this embodiment includes a box body, a box door 130, and a fan 110, an air duct plate 120, a return air mesh port 140, an evaporator 150, a heater 160, and a humidifier 170, etc., located in the box body. There is also a test area 180 in the box body. When the fan 110 is working, the air duct plate 120, the return air mesh port 140, the heater 160, the humidifier 170, and the evaporator 150, etc. in the box body will generate resistance. This embodiment provides a method for determining a fan suitable for an environmental test box, which can more accurately determine the wind field resistance in the environmental test box, and then determine the fan suitable for the environmental test box according to the wind field resistance, so that the air volume generated by the determined fan meets the needs of the environmental test box, avoiding energy waste caused by excessive air volume, and avoiding the problem that the environmental test box cannot meet the test requirements due to insufficient air volume.

[0060] Figure 2 is a flow chart of a method for determining a fan suitable for an environmental test chamber according to an embodiment of the present invention, with reference to Figure 2 The fan determination method provided in this embodiment includes the following steps:

[0061] S110, selecting a plurality of fans of different specifications and a plurality of first resistance components.

[0062] Specifically, fans of different specifications may generate different air volumes and wind speeds. In this embodiment, multiple fans of different specifications are selected to determine the resistance generated by the same first resistance component at different wind speeds generated by fans of different specifications.

[0063] The multiple first resistance components may include multiple first resistance components with different functions. For example, the multiple first resistance components include air duct plates, return air mesh ports, heaters, humidifiers, and evaporators. The multiple first resistance components may also include first resistance components with the same functions but different specifications. For example, the multiple first resistance components also include multiple evaporators with different specifications, and the sizes of evaporators with different specifications are different. Selecting multiple first resistance components can determine the resistance generated by different first resistance components under the action of the fan.

[0064] S120, determining the first resistance generated by each first resistance component under each specification of the fan in the simulated environmental test chamber.

[0065] Specifically, when determining the first resistance generated by each first resistance component, only one first resistance component and a fan of one specification are placed in the simulated environmental test chamber, the fan in the simulated environmental test chamber is operated, and then the first resistance generated by the first resistance component in the simulated environmental test chamber is determined. After the determination is completed, the fan in the simulated environmental test chamber is kept unchanged, and another first resistance component is replaced, and then the first resistance generated by the first resistance component is determined, and then other first resistance components with undetermined resistance are replaced, until the first resistance generated by all first resistance components under the fan of the current specification is determined. Then the specification of the fan is replaced, and the first resistance generated by each first resistance component under the replaced fan is determined by the same method, and then the specification of the fan is continued to be replaced until the first resistance generated by each first resistance component under all specifications of the fan is determined.

[0066] S130, determining an estimated wind field resistance when the environmental test box is set to include at least one second resistance component according to the first resistance corresponding to each first resistance component under each specification of the wind turbine.

[0067] The function of the second resistance component is the same as the function of at least one first resistance component among the plurality of first resistance components.

[0068] For example, Table 1 may be the first resistance corresponding to each first resistance component under each specification of the fan, wherein b1 and b2 represent fans of different specifications, a1, a2, a3, a4, and a5 represent different first resistance components, and P11-P15 and P21-P25 all represent first resistances. P11 and P23 are used as examples for specific description, where P11 represents the first resistance generated by the first resistance component a1 under the fan of specification b1 in the simulated environmental test chamber, and P23 represents the first resistance generated by the first resistance component a3 under the fan of specification b2 in the simulated environmental test chamber.

[0069] Table 1

[0070]

[0071]

[0072] The second resistance component may be one of the plurality of first resistance components, and the setting environment test chamber may be the same as that of the simulation environment test chamber.

[0073] The wind field resistance when the environmental test box includes at least one second resistance component can be estimated based on the first resistance corresponding to each first resistance component under each specification of the fan, and the estimated wind field resistance is used as the estimated wind field resistance. For example, when the environmental test box includes a fan of specification b1 and a first resistance component a1, the predicted wind field resistance of the environmental test box can be determined to be P11. When the environmental test box includes a fan of specification b1, a first resistance component a1, a first resistance component a2, and a first resistance component a3, the predicted wind field resistance of the environmental test box can be determined based on P11, P12, and P13. For example, when the environmental test box includes a second resistance component that is not one of the multiple first resistance components and a fan of specification b1, the second resistance component is an evaporator of size 10, the first resistance component a4 represents an evaporator of size 5, and the first resistance component a5 represents an evaporator of size 8, the estimated wind field resistance when the size of the evaporator under the fan of specification b1 is 10 can be determined based on P14 and P15.

[0074] S140. Determine a fan suitable for the set environmental test chamber according to the estimated wind field resistance.

[0075] Specifically, each specification of the fan corresponds to an air volume curve (generally referred to as a PQ curve), wherein the air volume curve represents the corresponding relationship between static pressure and air volume. The estimated air volume can be determined based on the estimated wind field resistance and multiple air volume curves, and then the fan adapted to the set environmental test box is determined based on the estimated air volume and the air volume required for the set environmental test box. For example, when the air volume required for the set environmental test box is 1100 (in international units) and the estimated wind field resistance is 80 (in international units), in the air volume curve corresponding to the fan of specification b1 It is determined that the air volume with a wind resistance of 80 is 1000 (in international units). In the air volume curve corresponding to the fan with specification B2, it is determined that the air volume with a wind resistance of 80 is 1200 (in international units). In the air volume curve corresponding to the fan with specification B3, it is determined that the air volume with a wind resistance of 80 is 1150 (in international units). It can be seen that the air volume generated by the fan with specification B3 is closer to the air volume required for the set environmental test chamber. Therefore, the fan with specification B3 can be selected as the fan adapted to the set environmental test chamber.

[0076] It should be noted that, in this embodiment, the estimated wind field resistance of the set environmental test box is determined only under a simulated environmental test box. In order to determine the estimated wind field resistance more accurately, multiple different simulated environmental test boxes can be selected, and the first resistance generated by each of the first resistance components under each specification of the fan in each simulated environmental test box is determined. The estimated wind field resistance when the set environmental test box includes at least one second resistance component is determined based on the first resistance corresponding to each first resistance component under each specification of the fan in each simulated environmental test box, thereby more accurately determining the estimated wind field resistance.

[0077] The present embodiment provides a method for determining a fan that is suitable for an environmental test chamber, and the method includes: first selecting a plurality of fans of different specifications and a plurality of first resistance components, then determining the first resistance generated by each first resistance component under each specification of the fan in the simulated environmental test chamber, and then determining the estimated wind field resistance when the set environmental test chamber includes at least one second resistance component based on the first resistance corresponding to each first resistance component under each specification of the fan, and finally determining the fan that is suitable for the set environmental test chamber based on the estimated wind field resistance. The present embodiment determines the first resistance generated by each first resistance component under the same specification of the fan, and also determines the first resistance generated by the same first resistance component under multiple different specifications of the fan, thereby increasing the number of first resistances and improving the accuracy of determining the estimated wind field resistance based on multiple first resistances and the first resistance components corresponding to the first resistances. In addition, the function of the second resistance component in the set environmental test box is the same as that of the first resistance component, so that the estimated wind field resistance in the set environmental test box can be determined more accurately based on the first resistance corresponding to the first resistance component, and the air volume determined based on the estimated wind field resistance is more accurate. Finally, the fan selection is completed based on the wind volume, so that the air volume generated by the selected fan can be adapted to the air volume required by the set environmental test box. In summary, the method for determining the fan adapted to the environmental test box provided in this embodiment can more accurately determine the wind field resistance in the environmental test box, and thus can more accurately determine the fan required for the environmental test box, avoiding energy waste caused by excessive air volume, and avoiding the problem that the environmental test box cannot meet the test requirements due to insufficient air volume.

[0078] Optional, Figure 3 FIG. 1 is a flow chart of another method for determining a fan suitable for an environmental test chamber provided according to an embodiment of the present invention, with reference to FIG. Figure 3 The fan determination method provided in this embodiment includes the following steps:

[0079] S210, selecting a plurality of fans of different specifications and a plurality of first resistance components.

[0080] The content of step S210 is the same as that of step S110. For the description of the content of step S210, please refer to the description of step S110, which will not be repeated here.

[0081] S220, determining the first resistance generated by each first resistance component under a fan of current specifications in the simulated environmental test chamber.

[0082] Specifically, when determining the first resistance, only two components need to be placed in the simulated environmental test chamber, one of which is the fan and the other is the first resistance component. Placing a first resistance component in the environmental test chamber can more accurately determine the first resistance of the first resistance component in the simulated environmental test chamber, avoiding resistance interference caused by other first resistance components. After determining the first resistance corresponding to all first resistance components under the fan of the current specification, the fan of the current specification can be replaced to avoid frequent replacement of the fan and increase the test time.

[0083] S230, detecting whether the first resistance generated by each first resistance component under each specification of the fan in the simulated environmental test chamber is determined.

[0084] Specifically, when the first resistance generated by each first resistance component under fans of other specifications has not been determined, the specifications of the fan need to be changed to ensure that the first resistance generated by each first resistance component under fans of all specifications can be determined, so as to determine more first resistances, and thus the estimated wind field resistance in the set environmental test chamber can be more accurately determined based on a larger number of first resistances, thereby improving the accuracy of determining the fan suitable for the set environmental test chamber.

[0085] If not, execute step S240.

[0086] If yes, execute step S250.

[0087] S240, changing the specifications of the fan in the simulated environmental test chamber, and then returning to step S220.

[0088] Specifically, the fan in the simulated environmental test chamber is first taken out, and then another fan of the same specification is installed in the simulated environmental test chamber.

[0089] S250, determining an estimated wind field resistance when the environmental test box is set to include at least one second resistance component according to the first resistance corresponding to each first resistance component under each specification of the wind turbine.

[0090] The content of step S250 is the same as that of step S130. For the description of the content of step S250, please refer to the description of step S130, which will not be repeated here.

[0091] S260: Determine a fan suitable for the set environmental test chamber according to the estimated wind field resistance.

[0092] The content of step S260 is the same as that of step S140. For the description of the content of step S260, please refer to the description of step S140, which will not be repeated here.

[0093] Optionally, the simulated environmental test chamber includes a chamber body and a chamber door.

[0094] Figure 4 FIG. 1 is a flow chart of another method for determining a fan suitable for an environmental test chamber provided according to an embodiment of the present invention, with reference to FIG. Figure 4 The fan determination method provided in this embodiment includes the following steps:

[0095] S310, selecting a plurality of fans of different specifications and a plurality of first resistance components.

[0096] The content of step S310 is the same as that of step S210. For the description of the content of step S310, please refer to the description of step S210, which will not be repeated here.

[0097] S320, determining the correspondence between the static pressure and the current of a fan of current specifications located outside the box.

[0098] Specifically, the fan of the current specification refers to only one of the fans of multiple different specifications. The PI curve (static pressure-current curve) of the fan of the current specification can be measured on a fan test platform at room temperature to obtain the corresponding relationship between the static pressure and current of the fan of the current specification.

[0099] S330, determining a first output current when a fan of current specifications is located in a box with the box door open and the fan is in a stable state.

[0100] Specifically, only a fan of one specification is installed in the box, and only the fan is installed in the box, the box door is opened and only the fan is operated, and the output current I0 of the motor in the fan is measured after the fan is in a stable state, which is the first output current. The stable output current of the fan indicates that the fan is in a stable state. Determining the first output current with the box door open can avoid the influence of the resistance generated by the box door on the first output current.

[0101] S340, determining a second output current when a fan of current specifications and a current first resistance component are located in a box, the box door is open, and the fan is in a stable state.

[0102] Specifically, a first resistance component is placed in the box. At this time, the box only includes a fan and a first resistance component. The box door is kept open to run the fan of the current specification. After the fan is in a stable state, the output current of the motor in the fan is measured, which is the second output current. Determining the second output current with the box door open can avoid the influence of the resistance generated by the box door on the second output current.

[0103] S350, determining the first resistance generated by the current first resistance component under the fan of the current specification according to the corresponding relationship between the static pressure and the current, the first output current and the second output current.

[0104] Specifically, the first static pressure resistance corresponding to the first output current can be determined according to the correspondence between static pressure and current and the first output current, the second static pressure resistance corresponding to the second output current can be determined according to the correspondence between static pressure and current and the second output current, and then the first resistance generated by the current first resistance component under the current specification of the fan can be determined according to the first static pressure resistance and the second static pressure resistance.

[0105] S360, detecting whether the first resistance generated by each first resistance component under the fan of the current specification in the box is determined.

[0106] Specifically, under the current specifications of the fan, if there are other first resistance components whose first resistances have not been determined, the first resistance components need to be replaced to ensure that under the current specifications of the fan, the first resistances generated by each first resistance component are determined, so as to determine more first resistances, so that the estimated wind field resistance in the set environmental test chamber can be more accurately determined based on a larger number of first resistances, thereby improving the accuracy of determining the fan that is suitable for the set environmental test chamber.

[0107] If not, execute step S370 and then return to step S340.

[0108] If so, execute step S380.

[0109] S370, replace the first resistance component in the box, and then return to step S340.

[0110] Specifically, first take out the first resistance component in the box, and then place the other first resistance component into the simulated environmental test box.

[0111] S380, detecting whether the first resistance generated by each first resistance component under each specification of the fan in the simulated environmental test chamber is determined.

[0112] The content of step S380 is the same as that of step S230. For the description of the content of step S380, please refer to the description of step S230, which will not be repeated here.

[0113] If not, execute step S390.

[0114] If so, execute step S391.

[0115] S390, changing the specifications of the fan in the simulated environmental test chamber, and then returning to step S320.

[0116] The content of step S390 is the same as that of step S240. For the description of the content of step S390, please refer to the description of step S240, which will not be repeated here.

[0117] S391. Determine the estimated wind field resistance when the environmental test box is set to include at least one second resistance component according to the first resistance corresponding to each first resistance component under each specification of the wind turbine.

[0118] The content of step S391 is the same as that of step S250. For the description of the content of step S391, please refer to the description of step S250, which will not be repeated here.

[0119] S392. Determine a fan suitable for the set environmental test chamber based on the estimated wind field resistance.

[0120] The content of step S392 is the same as that of step S260. For the description of the content of step S392, please refer to the description of step S260, which will not be repeated here.

[0121] Optionally, determining the corresponding relationship between the static pressure and the current of a fan of current specifications located outside the box includes: determining the corresponding relationship between the static pressure and the current of a fan of current specifications located outside the box at a set temperature value;

[0122] Determining a first output current when a fan of a current specification is located in a box and the box door is open and the fan is in a stable state, comprising: when the temperature in the box is a set temperature value, determining a first output current when a fan of a current specification is located in a box and the box door is open and the fan is in a stable state;

[0123] Determine the second output current of a fan of current specifications and a current first resistance component located in a box, with the box door open, and the fan is in a stable state, including: when the temperature in the box is a set temperature value, determine the second output current of a fan of current specifications and a current first resistance component located in the box, with the box door open, and the fan is in a stable state.

[0124] Specifically, the correspondence between static pressure and current, the first output current and the second output current are all determined under the same set temperature value. This setting ensures that the temperature inside the box during the test maintains the same ambient temperature as the fan test bench test, avoids the influence of different temperatures on the first resistance, improves the determination accuracy of the first resistance, and thus improves the determination accuracy of the fan adapted to the environmental test chamber.

[0125] Optionally, determining the first resistance generated by the current first resistance component under the fan of the current specification according to the corresponding relationship between the static pressure and the current, the first output current and the second output current comprises the following steps:

[0126] S351. Determine a first static pressure resistance corresponding to a fan of current specifications according to a correspondence between static pressure and current and a first output current.

[0127] Specifically, the static pressure corresponding to the current equal to the first output current is found in the correspondence relationship between the static pressure and the current, and the static pressure is used as the first static pressure resistance.

[0128] S352: Determine the second static pressure resistance corresponding to the current first resistance component under the fan of the current specification according to the corresponding relationship between the static pressure and the current and the second output current.

[0129] Specifically, the static pressure corresponding to the current equal to the second output current is found in the correspondence relationship between the static pressure and the current, and the static pressure is used as the second static pressure resistance.

[0130] S353, determining the first resistance generated by the current first resistance component under the fan of the current specification according to the first static pressure resistance and the second static pressure resistance.

[0131] Specifically, the difference between the second static pressure resistance and the first static pressure resistance may be used as the first resistance generated by the current first resistance component of the fan of the current specification.

[0132] In this embodiment, the first static pressure resistance and the second static pressure resistance determined according to the corresponding relationship between the static pressure and the current are more accurate, so that the first resistance can be determined more accurately.

[0133] Optionally, determining the first resistance generated by the current first resistance component under the fan of current specifications according to the first static pressure resistance and the second static pressure resistance includes: taking the difference between the second static pressure resistance and the first static pressure resistance as the first resistance.

[0134] Specifically, the difference between the second static pressure resistance and the first static pressure resistance is used as the first resistance, so that the method for determining the first resistance is simple and fast. This embodiment improves the efficiency of determining the first resistance while ensuring the accuracy of determining the first resistance, thereby improving the efficiency of determining the fan adapted to the environmental test chamber.

[0135] Optionally, determining the estimated wind field resistance when setting the environmental test box to include at least one second resistance component according to the first resistance corresponding to each first resistance component under each specification of the wind turbine includes the following steps:

[0136] S131, establishing a wind resistance database according to each first resistance component, fans of different specifications and each first resistance.

[0137] Specifically, referring to Table 1, each first resistance component under each specification of the fan corresponds to a first resistance. Table 1 may be a wind resistance database.

[0138] The first resistance of the resistance components that have not been tested can also be predicted based on the first resistance components, fans of different specifications and the first resistances. For example, under the fan of specification b1, the first resistance corresponding to the evaporator of size 5 is 20, the first resistance corresponding to the evaporator of size 6 is 25, and the first resistance corresponding to the evaporator of size 7 is 30. Based on these data, it can be predicted that the first resistance generated by the evaporator of size 8 under the fan of specification b1 is 35, and the first resistance of 35 corresponding to the evaporator of size 8 is placed in the wind resistance database corresponding to Table 1 to form a new wind resistance database.

[0139] The wind resistance database includes first resistances of different first resistance components and wind turbines of different specifications. Establishing a wind resistance database can quickly determine the estimated wind field resistance and improve the determination efficiency.

[0140] S132, determining an estimated wind field resistance when setting the environmental test box to include at least one second resistance component according to the wind resistance database and at least one second resistance component.

[0141] Specifically, the first resistance corresponding to the first resistance component that is the same as or similar to the second resistance component can be found in the wind resistance database according to each second resistance component, and then the estimated wind field resistance is determined according to each first resistance.

[0142] Optionally, determining a fan suitable for setting the environmental test chamber according to the estimated wind field resistance includes the following steps:

[0143] S141. Determine and set the required air volume of the environmental test chamber.

[0144] Specifically, the required air volume of the environmental test box can be determined according to the size and function of the environmental test box.

[0145] S142. Obtain the corresponding relationship between the static pressure and the air volume corresponding to each specification of the fan.

[0146] Specifically, the correspondence between static pressure and air volume for each specification of fan can be obtained by testing the fan. The correspondence between static pressure and air volume can be obtained to find the air volume corresponding to the static pressure equal to the estimated wind field resistance based on the correspondence between static pressure and air volume.

[0147] S143. Determine a fan suitable for the set environmental test chamber according to the estimated wind field resistance, the corresponding relationship between each static pressure and air volume, and the required air volume.

[0148] Specifically, in each correspondence between static pressure and air volume, the estimated air volume corresponding to the static pressure equal to the estimated wind field resistance is found, and the estimated air volume closest to the required air volume is determined based on these estimated air volumes, and then the fan corresponding to the estimated air volume is used as the fan adapted to the set environmental test chamber.

[0149] Optionally, the plurality of first resistance components include an air duct plate, a return air mesh port, a heater, a humidifier and a plurality of evaporators of different specifications, wherein the evaporators of different specifications have different sizes.

[0150] Specifically, the first resistance component is set to include multiple evaporators of different specifications because the size of the evaporator has a greater impact on the wind resistance of the evaporator. This embodiment can determine the first resistance corresponding to evaporators of different specifications, so that when determining the estimated wind field resistance of the set environmental test chamber, when the set environmental test chamber includes evaporators associated with multiple first resistance components, the determination accuracy of the estimated wind field resistance can be improved, thereby improving the determination accuracy of the fan adapted to the set environmental test chamber.

[0151] Optionally, the specifications of the simulated environmental test chamber are the same as the specifications of the set environmental test chamber.

[0152] Specifically, the cabinet of the environmental test chamber will also generate wind resistance, and the wind resistance of different environmental test chambers may be different. In this embodiment, the specifications of the simulated environmental test chamber are set to be the same as the specifications of the set environmental test chamber, so that the wind resistance generated by the cabinet of the simulated environmental test chamber is the same as the wind resistance generated by the cabinet of the set environmental test chamber, thereby avoiding the problem of inaccurate fan selection caused by different wind resistances generated by the cabinet. In summary, in this embodiment, the specifications of the simulated environmental test chamber are set to be the same as the specifications of the set environmental test chamber, which can further improve the accuracy of determining the fan adapted to the set environmental test chamber.

[0153] Next, another method for determining a fan suitable for an environmental test chamber will be introduced by taking a plurality of specific first resistance components and a plurality of specific fans of different specifications as examples. The plurality of first resistance components are an air duct plate, a return air mesh port, a heater, a humidifier, an evaporator of a first size, and an evaporator of a second size. The specific process is as follows:

[0154] First, measure the PI curve (static pressure-current curve) of the fan of specification 1 on the fan test platform at room temperature, and then install the fan in the simulated environmental test chamber. When only the fan of specification 1 is installed in the simulated environmental test chamber, open the door and only run the fan. After it stabilizes, measure the current I0 of the motor in the fan, and refer to the PI curve to find the corresponding static pressure resistance P0; on this basis, only add the air duct plate, return air network port, heater, humidifier, evaporator of the first size and evaporator of the second size, continue to open the door and run the fan, and measure the motor current I1, I3, I5, I6, I7, I8 in the fan after it stabilizes, and refer to the PI curve to find the corresponding static pressure resistance P1, P3, P5, P6, P7, P8. The wind field resistance generated by the corresponding components is: P 1-0 =P1-P0, P 3-0 =P3-P0, P 5-0 =P5-P0,P6-0 =P6-P0,P 7-0 =P7-P0,P 8-0 = P8-P0, replace the fan of specification 2, repeat the above steps, and finally calculate the P corresponding to each fan specification. 1-0 , P 3-0 , P 5-0 , P 6-0 , P 7-0 , P 8-0 Determine the estimated wind field resistance of the set environmental test chamber, determine the air volume required for the set environmental test chamber based on the estimated wind field resistance, and determine the fan suitable for the set environmental test chamber based on the air volume.

[0155] It should be noted that P in this embodiment 1-0 , P 3-0 , P 5-0 , P 6-0 , P 7-0 , P 8-0 Refers to the first resistance in other embodiments.

[0156] Figure 5 is a schematic diagram of a fan determination device adapted to an environmental test chamber according to an embodiment of the present invention, with reference to Figure 5 The wind turbine determination device provided in this embodiment includes a selection module 210 , a component resistance determination module 220 , a wind field resistance determination module 230 and a wind turbine determination module 240 .

[0157] The selection module 210 is used to select a plurality of fans of different specifications and a plurality of first resistance components.

[0158] The component resistance determination module 220 is used to determine the first resistance generated by each first resistance component under each specification of the fan in the simulated environmental test chamber.

[0159] The wind field resistance determination module 230 is used to determine the estimated wind field resistance when the environmental test chamber is set to include at least one second resistance component based on the first resistance corresponding to each first resistance component under each specification of the wind turbine; wherein the function of the second resistance component is the same as the function of at least one first resistance component among the multiple first resistance components.

[0160] The fan determination module 240 is used to determine a fan that is suitable for setting the environmental test chamber according to the estimated wind field resistance.

[0161] The fan determination device for an environmental test chamber provided in this embodiment has corresponding beneficial effects as the fan determination method for an environmental test chamber provided in any embodiment of the present invention. For technical details not detailed in this embodiment, please refer to the fan determination method for an environmental test chamber provided in any embodiment of the present invention.

[0162] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0163] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for determining a fan suitable for an environmental test chamber, characterized in that: include: Selecting a plurality of fans of different specifications and a plurality of first resistance components; Determine the first resistance generated by each of the first resistance components under each specification of the fan in the simulated environmental test chamber; Determine the estimated wind field resistance when the environmental test box is set to include at least one second resistance component according to the first resistance corresponding to each first resistance component under each specification of the wind turbine; wherein the function of the second resistance component is the same as the function of at least one of the first resistance components among the plurality of the first resistance components; A fan adapted to the set environmental test chamber is determined according to the estimated wind field resistance.

2. The wind turbine determination method according to claim 1, characterized in that: The determining of the first resistance generated by each of the first resistance components under each specification of the fan in the simulated environmental test chamber includes: Determine a first resistance generated by each of the first resistance components under a fan of current specifications in the simulated environmental test chamber; Detecting whether the first resistance generated by each of the first resistance components under each specification of the fan in the simulated environmental test chamber is determined; If not, the specification of the fan in the simulated environmental test chamber is changed, and then the process returns to the step of determining the first resistance generated by each first resistance component under a fan of current specification in the simulated environmental test chamber.

3. The wind turbine determination method according to claim 2, characterized in that: The simulated environmental test box includes a box body and a box door; The determining of the first resistance generated by each of the first resistance components under a fan of current specifications in the simulated environmental test chamber includes: Determine the corresponding relationship between the static pressure and the current of the fan of the current specification located outside the box; Determine a first output current when the fan of current specifications is located in the box and the box door is open and the fan is in a stable state; Determine a second output current when the fan of current specifications and a current first resistance component are located in the box and the box door is open, and the fan is in a stable state; Determine the first resistance generated by the current first resistance component under the fan of the current specification according to the corresponding relationship between the static pressure and the current, the first output current and the second output current; Detecting whether the first resistance generated by each of the first resistance components under the fan of the current specification in the box is determined; If not, replace the first resistance component in the box body, and then return to the step of determining the second output current of the fan of the current specification and the current first resistance component is located in the box body and the box door is open, and the fan is in a stable state.

4. The wind turbine determination method according to claim 3, characterized in that: The determining of the correspondence between the static pressure and the current of the fan of the current specification located outside the box includes: Under the set temperature value, determining the corresponding relationship between the static pressure and the current of the fan of the current specification located outside the box; The determining of the first output current when the fan of the current specification is located in the box and the box door is open and the fan is in a stable state includes: When the temperature in the box is the set temperature value, determining that the fan of the current specification is located in the box and the box door is open, and the fan is in a first output current in a stable state; The second output current when the fan of the current specification and a current first resistance component are located in the box and the box door is open and the fan is in a stable state includes: When the temperature in the box is the set temperature value, determine the second output current of the fan of the current specification and a current first resistance component located in the box and the box door is open, and the fan is in a stable state.

5. The wind turbine determination method according to claim 3, characterized in that: The determining, according to the correspondence between the static pressure and the current, the first output current, and the second output current, the first resistance generated by the current first resistance component under the fan of the current specification includes: Determining a first static pressure resistance corresponding to the fan of current specifications according to the correspondence between the static pressure and the current and the first output current; Determine, according to the correspondence between the static pressure and the current and the second output current, the second static pressure resistance corresponding to the current first resistance component under the fan of the current specification; The first resistance generated by the current first resistance component under the fan of the current specification is determined according to the first static pressure resistance and the second static pressure resistance.

6. The wind turbine determination method according to claim 5, characterized in that: The determining, according to the first static pressure resistance and the second static pressure resistance, the first resistance generated by the current first resistance component under the fan of the current specification includes: The difference between the second static pressure resistance and the first static pressure resistance is used as the first resistance.

7. The wind turbine determination method according to claim 1, characterized in that: The method of determining the estimated wind field resistance when the environmental test box includes at least one second resistance component according to the first resistance corresponding to each first resistance component under each specification of the wind turbine includes: Establishing a wind resistance database according to each of the first resistance components, fans of different specifications and each of the first resistances; The estimated wind field resistance when the set environmental test box includes at least one second resistance component is determined according to the wind resistance database and the at least one second resistance component.

8. The wind turbine determination method according to claim 1, characterized in that: The method of determining a fan adapted to set the environmental test chamber according to the estimated wind field resistance includes: Determining the required air volume of the set environmental test chamber; Obtain the corresponding relationship between static pressure and air volume for each specification of fan; A fan adapted to the set environmental test chamber is determined according to the estimated wind field resistance, the corresponding relationship between the static pressure and the air volume, and the required air volume.

9. The wind turbine determination method according to any one of claims 1 to 8, characterized in that: The plurality of first resistance components include an air duct plate, a return air mesh port, a heater, a humidifier, and a plurality of evaporators of different specifications, wherein the evaporators of different specifications have different sizes; And / or, the specifications of the simulated environmental test chamber are the same as the specifications of the set environmental test chamber.

10. A fan determination device adapted to an environmental test chamber, characterized in that: It includes a selection module, a component resistance determination module, a wind field resistance determination module and a wind turbine determination module; The selection module is used to select a plurality of fans of different specifications and a plurality of first resistance components; The component resistance determination module is used to determine the first resistance generated by each of the first resistance components under each specification of the fan in the simulated environmental test chamber; The wind field resistance determination module is used to determine the estimated wind field resistance when the environmental test box is set to include at least one second resistance component according to the first resistance corresponding to each first resistance component under each specification of the wind turbine; wherein the function of the second resistance component is the same as the function of at least one of the first resistance components among the plurality of the first resistance components; The fan determination module is used to determine a fan that is suitable for setting the environmental test box according to the estimated wind field resistance.

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