Method and device for determining a fan of an environmental test chamber

Abstract

The application discloses a fan determination method and device suitable for an environmental test chamber. The fan determination method comprises the following steps: selecting multiple fans of different specifications and multiple first resistance components; determining the first resistance generated by each first resistance component under each specification of fan in the simulation environmental test chamber; determining the estimated wind field resistance when the environmental test chamber is provided with at least one second resistance component according to the first resistance corresponding to each first resistance component under each specification of fan; and determining the fan suitable for the environmental test chamber according to the estimated wind field resistance. The application provides a fan determination method and device 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 required fan of the environmental test chamber, avoiding the problem of energy waste caused by excessive air volume, and avoiding the problem that the environmental test chamber cannot meet the test requirements caused by insufficient air volume.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environmental test equipment, and in particular to a fan determination method and device for an environmental test chamber. BACKGROUND

[0002] An environmental test chamber is a detection device for simulating natural climate environment. It can simulate various environmental conditions such as high temperature, low temperature, humidity, light, rain, ozone, vapor, salt spray, and sand. There are many types of environmental test chambers, including but not limited to high-low temperature test chambers, constant temperature and humidity test chambers, cold and hot impact 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 in an environmental test chamber is mainly based on empirical values to estimate the wind field resistance in the environmental test chamber. According to the value, the fan selection is matched with the air volume, or a high-power fan is forcibly used to achieve the target requirement.

[0004] The method of estimating the wind field resistance based on empirical values and then selecting the fan is prone to cause insufficient air volume or excessive air volume in the environmental test chamber. Insufficient air volume can lead to problems such as reduced temperature rise rate of the environmental test chamber and compressor liquid return. Excessive air volume can cause unnecessary energy loss and cost increase, and the use of high-power fans generally results in low fan efficiency and energy saving problems. SUMMARY

[0005] The present application provides a fan determination method and device for an environmental test chamber, which can more accurately determine the wind field resistance in the environmental test chamber, thereby more accurately determining the required fan for the environmental test chamber, avoiding energy waste caused by excessive air volume, and avoiding the problem of insufficient air volume leading to the environmental test chamber failing to meet the test requirements.

[0006] According to an aspect of the present application, a fan determination method for an environmental test chamber is provided, which comprises:

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

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

[0009] Determining the estimated wind field resistance when the environmental test chamber includes at least one second resistance component according to the corresponding first resistance of each of the first resistance components under each specification of fan; wherein the function of the second resistance component is the same as that of at least one of the first resistance components in the plurality of first resistance components;

[0010] According to the estimated wind field resistance, a fan of the environmental test chamber is adapted.

[0011] Optionally, the determining the first resistance generated by each of the first resistance components under each size of the fan in the simulation environmental test chamber comprises:

[0012] The first resistance generated by each of the first resistance components under a current size of the fan in the simulation environmental test chamber is determined.

[0013] It is detected whether the first resistance generated by each of the first resistance components under each size of the fan in the simulation environmental test chamber is determined.

[0014] If not, the size of the fan in the simulation environmental test chamber is replaced, and then the step of determining the first resistance generated by each of the first resistance components under a current size of the fan in the simulation environmental test chamber is returned.

[0015] Optionally, the simulation environmental test chamber comprises a chamber body and a chamber door.

[0016] The determining the first resistance generated by each of the first resistance components under a current size of the fan in the simulation environmental test chamber comprises:

[0017] A corresponding relationship between the static pressure and the current of the fan of the current size outside the chamber body is determined.

[0018] A first output current of the fan of the current size in a stable state when the fan is located in the chamber body and the chamber door is opened is determined.

[0019] A second output current of the fan of the current size in a stable state when the fan and a current first resistance component are located in the chamber body and the chamber door is opened is determined.

[0020] The first resistance generated by the current first resistance component under the fan of the current size is determined according to the corresponding relationship between the static pressure and the current, the first output current and the second output current.

[0021] It is detected whether the first resistance generated by each of the first resistance components under the fan of the current size in the chamber body is determined.

[0022] If not, the first resistance components in the chamber body are replaced, and then the step of determining the second output current of the fan of the current size in a stable state when the fan and a current first resistance component are located in the chamber body and the chamber door is opened is returned.

[0023] Optionally, the determining the corresponding relationship between the static pressure and the current of the fan of the current size outside the chamber body comprises:

[0024] determining a corresponding relationship between static pressure and current of the fan of the current specification located outside the chamber at the set temperature value;

[0025] the first output current of the fan of the current specification located inside the chamber and the cabinet door being opened when the fan is in a stable state, comprises:

[0026] the first output current of the fan of the current specification located inside the chamber and the cabinet door being opened when the fan is in a stable state, is determined when the temperature inside the chamber is the set temperature value;

[0027] the second output current of the fan of the current specification and a current first resistance component located inside the chamber and the cabinet door being opened when the fan is in a stable state, comprises:

[0028] the second output current of the fan of the current specification and a current first resistance component located inside the chamber and the cabinet door being opened when the fan is in a stable state, is determined when the temperature inside the chamber is the set temperature value.

[0029] Optionally, the first resistance generated by the current first resistance component under the fan of the current specification is determined according to the corresponding relationship between the static pressure and the current, the first output current and the second output current, comprising:

[0030] a first static pressure resistance corresponding to the fan of the current specification is determined according to the corresponding relationship between the static pressure and the current and the first output current;

[0031] a second static pressure resistance corresponding to the current first resistance component under the fan of the current specification is determined according to the corresponding relationship between the static pressure and the current and the second output current;

[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, 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, comprising:

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

[0035] Optionally, the estimated wind field resistance when the set environmental test chamber comprises at least one second resistance component is determined according to the first resistance corresponding to each first resistance component under each specification of fan, comprising:

[0036] According to each of the first resistance components, the different specifications of the air fans and each of the first resistances, a wind resistance database is established.

[0037] According to the wind resistance database and the at least one second resistance component, an estimated wind field resistance of the set environment test chamber including the at least one second resistance component is determined.

[0038] Optionally, the determining of the air fan adapted to the set environment test chamber according to the estimated wind field resistance comprises:

[0039] The required air volume of the set environment test chamber is determined.

[0040] The corresponding relationship between the static pressure and the air volume corresponding to each specification of the air fan is obtained.

[0041] The air fan adapted to the set environment 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 comprises an air duct plate, a return air mesh, a heater, a humidifier and a plurality of different specifications of evaporators, wherein the different specifications of the evaporators are different in size.

[0043] And / or, the specification of the simulation environment test chamber is the same as the specification of the set environment test chamber.

[0044] According to another aspect of the present application, there is provided a device for determining an air fan adapted to an environment test chamber, which comprises a selection module, a component resistance determining module, a wind field resistance determining module and an air fan determining module.

[0045] The selection module is used for selecting a plurality of different specifications of air fans and a plurality of first resistance components.

[0046] The component resistance determining module is used for determining the first resistance generated by each of the first resistance components under each specification of the air fan in a simulation environment test chamber.

[0047] The wind field resistance determining module is used for determining an estimated wind field resistance of a set environment test chamber including at least one second resistance component according to the first resistance corresponding to each of the first resistance components under each specification of the air fan; wherein the function of the second resistance component is the same as that of at least one of the first resistance components in the plurality of first resistance components.

[0048] The air fan determining module is used for determining the air fan adapted to the set environment test chamber according to the estimated wind field resistance.

[0049] The fan determination method for adapting to the environmental test chamber provided by the embodiment of the present application comprises the following steps: first, selecting a plurality of different specifications of fans and a plurality of first resistance components; then, determining the first resistance generated by each first resistance component under each specification of fan in the simulation environmental test chamber; then, determining the estimated wind field resistance when the set environmental test chamber comprises at least one second resistance component according to the corresponding first resistance of each first resistance component under each specification of fan; and finally, determining the fan adapted to the set environmental test chamber according to the estimated wind field resistance. The embodiment of the present application determines the first resistance generated by each first resistance component under the same specification of fan, and also determines the first resistance generated by the same first resistance component under a plurality of different specifications of fan, thereby increasing the number of first resistances and improving the accuracy of determining the estimated wind field resistance according to a plurality of first resistances and the first resistance components corresponding to the first resistances. In addition, the second resistance component in the set environmental test chamber has the same function as the first resistance component, so that the estimated wind field resistance in the set environmental test chamber can be more accurately determined according to the first resistance corresponding to the first resistance component, the air volume determined according to the estimated wind field resistance is more accurate, and finally, the selection of the fan can be completed according to the air volume, so that the air volume generated by the selected fan can be adapted to the required air volume of the set environmental test chamber. In summary, the fan determination method for adapting to the environmental test chamber provided by the embodiment of the present application can more accurately determine the wind field resistance in the environmental test chamber, so that the required fan of the environmental test chamber can be more accurately determined, thereby avoiding the problems of energy waste caused by excessive air volume and the problem of the environmental test chamber failing to meet the test requirements caused by insufficient air volume.

[0050] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

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

[0053] Figure 2 is a flow schematic diagram of a fan determination method for adapting to the environmental test chamber provided by the embodiment of the present application;

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

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

[0056] Figure 5 is a structural diagram of a device for determining a fan of an environmental test chamber according to an embodiment of the present application. DETAILED DESCRIPTION

[0057] In order to make the personnel in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the person of ordinary skill in the art without creative labor should belong to the scope of protection of the present application.

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

[0059] Figure 1 is a structural diagram of an environmental test chamber according to an embodiment of the present application, referring to Figure 1The environmental test chamber provided by the embodiment comprises a chamber body, a chamber door 130, and a fan 110, an air duct plate 120, an air return mesh 140, an evaporator 150, a heater 160, and a humidifier 170 in the chamber body. The chamber body also has a test area 180. When the fan 110 is working, the air duct plate 120, the air return mesh 140, the heater 160, the humidifier 170, and the evaporator 150 in the chamber body all generate resistance. The embodiment provides a method for determining a fan suitable for an environmental test chamber, which can accurately determine the wind field resistance in the environmental test chamber, and then determine a fan suitable for the environmental test chamber according to the wind field resistance, so that the air volume generated by the determined fan meets the requirements of the environmental test chamber, avoiding the problems of energy waste caused by excessive air volume and insufficient air volume leading to the failure of the environmental test chamber to meet the test requirements.

[0060] Figure 2 is a flowchart of a method for determining a fan suitable for an environmental test chamber according to an embodiment of the present application, with reference to Figure 2 The fan determination method provided by the embodiment comprises the following steps:

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

[0062] Specifically, the air volume and air speed generated by fans of different specifications are different. The embodiment selects a plurality of fans of different specifications to determine the resistance generated by the same first resistance component under different air speeds generated by the fans of different specifications.

[0063] The plurality of first resistance components can comprise a plurality of first resistance components with different functions. For example, the plurality of first resistance components comprise an air duct plate, an air return mesh, a heater, a humidifier, and an evaporator. The plurality of first resistance components can also comprise a plurality of first resistance components with the same function but different specifications. For example, the plurality of first resistance components also comprise a plurality of evaporators with different specifications, and the different specifications of the evaporators have different sizes. Selecting a plurality of 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 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 one type of fan are placed in the simulation environment test chamber, the fan in the simulation environment test chamber is operated, and then the first resistance generated by the first resistance component in the simulation environment test chamber is determined. After the determination, the fan in the simulation environment 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. Another first resistance component with undetermined resistance is replaced until the first resistance generated by each first resistance component under the current type of fan is determined. Then the type of fan is replaced, and the same method is used to determine the first resistance generated by each first resistance component under the replaced fan. Then the type of fan is continuously replaced until the first resistance generated by each first resistance component under all types of fans is determined.

[0066] S130, determining the estimated wind field resistance when the setting environment test chamber includes at least one second resistance component according to the first resistance corresponding to each first resistance component under each type of fan.

[0067] Among them, the function of the second resistance component is the same as that of at least one first resistance component in the plurality of first resistance components.

[0068] For example, Table 1 can correspond to the first resistance of each first resistance component under each type of fan, wherein b1 and b2 represent different types of fans, a1, a2, a3, a4 and a5 represent different first resistance components, and P11-P15 and P21-P25 represent the first resistance. Take P11 and P23 as examples for specific description, P11 represents the first resistance generated by the first resistance component a1 under the fan of type b1 in the simulation environment test chamber, and P23 represents the first resistance generated by the first resistance component a3 under the fan of type b2 in the simulation environment test chamber.

[0069] Table 1

[0070]

[0071]

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

[0073] The first resistance part corresponding to the first resistance estimation of each specification fan can be used to estimate the wind field resistance of the environmental test chamber including at least one second resistance part, and the estimated wind field resistance is used as the estimated wind field resistance. For example, when the environmental test chamber includes a specification b1 fan and a first resistance part a1, the predicted wind field resistance of the environmental test chamber can be determined as P11. When the environmental test chamber includes a specification b1 fan, a first resistance part a1, a first resistance part a2, and a first resistance part a3, the predicted wind field resistance of the environmental test chamber can be determined according to P11, P12, and P13. For example, the environmental test chamber includes a second resistance part that is not one of the multiple first resistance parts and a specification b1 fan, the second resistance part is a size 10 evaporator, the first resistance part a4 represents a size 5 evaporator, and the first resistance part a5 represents a size 8 evaporator. The estimated wind field resistance of the specification b1 fan with a size 10 evaporator can be determined according to P14 and P15.

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

[0075] Specifically, each specification fan corresponds to a wind volume curve (generally referred to as a P-Q curve), wherein the wind volume curve represents the corresponding relationship between static pressure and wind volume. The estimated wind volume can be determined according to the estimated wind field resistance and multiple wind volume curves, and the fan suitable for the environmental test chamber can be determined according to the estimated wind volume and the required wind volume of the environmental test chamber. For example, when the required wind volume of the environmental test chamber is 1100 (international units) and the estimated wind field resistance is 80 (international units), the wind volume of the wind resistance of 80 in the wind volume curve corresponding to the specification b1 fan is determined to be 1000 (international units), the wind volume of the wind resistance of 80 in the wind volume curve corresponding to the specification b2 fan is determined to be 1200 (international units), and the wind volume of the wind resistance of 80 in the wind volume curve corresponding to the specification b3 fan is determined to be 1150 (international units). It can be seen that the wind volume generated by the specification b3 fan is closer to the required wind volume of the environmental test chamber, and therefore, the specification b3 fan can be selected as the fan suitable for the environmental test chamber.

[0076] It should be noted that the embodiment only determines the estimated wind field resistance of the setting environmental test chamber under one simulation environmental test chamber. In order to more accurately determine the estimated wind field resistance, a plurality of different simulation environmental test chambers can be selected, and the first resistance generated by each first resistance component under each specification fan in each simulation environmental test chamber can be determined. The estimated wind field resistance of the setting environmental test chamber including at least one second resistance component is determined according to the corresponding first resistance of each first resistance component under each specification fan in each simulation environmental test chamber, so that the estimated wind field resistance can be more accurately determined.

[0077] The embodiment provides a fan determination method for adapting an environmental test chamber. The fan determination method comprises the following steps: first, a plurality of different specification fans and a plurality of first resistance components are selected; then, the first resistance generated by each first resistance component under each specification fan in a simulation environmental test chamber is determined; then, the estimated wind field resistance of the setting environmental test chamber including at least one second resistance component is determined according to the corresponding first resistance of each first resistance component under each specification fan; and finally, the fan adapted to the setting environmental test chamber is determined according to the estimated wind field resistance. The first resistance generated by each first resistance component under the same specification fan is determined, and the first resistance generated by the same first resistance component under a plurality of different specification fans is also determined, so that the number of first resistances is increased, and the accuracy of determining the estimated wind field resistance according to a plurality of first resistances and the corresponding first resistance components of the first resistances is improved. In addition, the function of the second resistance component in the setting environmental test chamber is the same as that of the first resistance component, so that the estimated wind field resistance in the setting environmental test chamber can be more accurately determined according to the corresponding first resistance of the first resistance component, the air volume determined according to the estimated wind field resistance is more accurate, and finally, the selection of the fan can be completed according to the air volume, so that the air volume generated by the selected fan can be adapted to the required air volume of the setting environmental test chamber. In summary, the fan determination method for adapting the environmental test chamber provided by the embodiment can more accurately determine the wind field resistance in the environmental test chamber, so that the required fan of the environmental test chamber can be more accurately determined, the problem of energy waste caused by excessive air volume is avoided, and the problem that the environmental test chamber cannot meet the test requirements caused by insufficient air volume is also avoided.

[0078] Optionally, Figure 3 is a flowchart of another fan determination method for adapting an environmental test chamber provided by an embodiment of the present application, and the fan determination method comprises the following steps: Figure 3 The fan determination method provided by the embodiment comprises the following steps:

[0079] S210, a plurality of different specification fans and a plurality of first resistance components are selected.

[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 a first resistance generated by each first resistance component under a current specification fan in the simulated environmental test chamber.

[0082] Specifically, when determining the first resistance, only two components are 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 interference from other first resistance components. After determining the respective first resistance of each first resistance component under the current specification fan, the current specification fan is replaced, which can avoid increasing the test duration due to frequent replacement of the fan.

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

[0084] Specifically, when the first resistance generated by each first resistance component under other specification fans has not been determined, the specification of the fan needs to be replaced to ensure that the first resistance generated by each first resistance component under all specification fans is determined, so as to determine more first resistances, thereby more accurately determining the estimated wind field resistance in the set environmental test chamber according to a larger number of first resistances, and improving the accuracy of determining the fan adapted to the set environmental test chamber.

[0085] If not, step S240 is performed.

[0086] If yes, step S250 is performed.

[0087] S240, replacing the specification 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 removed, and then a fan of another specification is installed in the simulated environmental test chamber.

[0089] S250, determining the estimated wind field resistance when the set environmental test chamber includes at least one second resistance component according to the respective first resistance of each first resistance component under each specification fan.

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

[0091] S260, determining the fan adapted to 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 details of the content of step S260, refer to the description of step S140, which will not be repeated here.

[0093] Optionally, the simulation environment test box comprises a box body and a box door.

[0094] Figure 4 is a flowchart of another method for determining a fan of an environmental test box according to an embodiment of the present application. According to the method, the following steps are performed: Figure 4 The fan determining method provided in this embodiment comprises the following steps:

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

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

[0097] S320, determining the corresponding relationship between the static pressure and the current of the fan of the current specification located outside the box body.

[0098] Specifically, the fan of the current specification refers to only one of the plurality of different specifications of fans. The P-I 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 the current of the fan of the current specification.

[0099] S330, determining the first output current of the fan of the current specification located inside the box body and with the box door open, the fan being in a stable state.

[0100] Specifically, only one specification of fan is installed inside the box body, and in the case where only the fan is installed inside the box body, the box door is opened and only the fan is operated, and after the fan is in a stable state, the output current I0 of the motor in the fan is measured, 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 in the case where the box door is open can avoid the influence of the resistance generated by the box door on the first output current.

[0101] S340, determining the second output current of the fan of the current specification and a current first resistance component located inside the box body and with the box door open, the fan being in a stable state.

[0102] Specifically, a first resistance component is placed inside the box body, at this time, the box body only includes one fan and one first resistance component, the box door is continued to be opened and the fan of the current specification is operated, and 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 in the case where the box door is 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 correspondence 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 the static pressure and the 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 the static pressure and the current and the second output current, and then the first resistance generated by the current first resistance component under the fan of the current specification 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 chamber is determined.

[0106] Specifically, under the fan of the current specification, if the first resistance generated by other first resistance components is not determined, the first resistance component needs to be replaced to ensure that the first resistance generated by each first resistance component under the fan of the current specification is 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 according to a larger number of first resistances, and the accuracy of determining the fan adapted to the set environmental test chamber is improved.

[0107] If not, step S370 is performed, and then the process returns to step S340.

[0108] If yes, step S380 is performed.

[0109] S370, replacing the first resistance component in the chamber, and then returning to step S340.

[0110] Specifically, the first resistance component in the chamber is taken out first, and then another first resistance component is placed in the simulation environmental test chamber.

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

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

[0113] If not, step S390 is performed.

[0114] If yes, step S391 is performed.

[0115] S390, replacing the specification of the fan in the simulation environmental test chamber, and then returning to step S320.

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

[0117] S391, determining the estimated wind field resistance of the set environment test chamber including at least one second resistance component according to the first resistance corresponding to each first resistance component under each fan of each specification.

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

[0119] S392, determining the fan adapted to the set environment test chamber according to the estimated wind field resistance.

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

[0121] Optionally, the corresponding relationship between the static pressure and the current of the fan of the current specification located outside the chamber is determined, comprising: determining the corresponding relationship between the static pressure and the current of the fan of the current specification located outside the chamber at a set temperature value;

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

[0123] The second output current of the fan of the current specification and a current first resistance component located inside the chamber with the chamber door open and the fan in a stable state is determined, comprising: determining the second output current of the fan of the current specification and a current first resistance component located inside the chamber with the chamber door open and the fan in a stable state when the temperature inside the chamber is a set temperature value.

[0124] Specifically, the corresponding relationship between the static pressure and the current, the first output current and the second output current are all determined at the same set temperature value. This setting ensures that the temperature inside the chamber during the test is maintained at the same environmental temperature as the fan test bench test, which can avoid the influence of different temperatures on the first resistance and improve the determination accuracy of the first resistance, thereby improving the determination accuracy of the fan adapted to the set environment test chamber.

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

[0126] S351, determining the first static pressure resistance corresponding to the fan of the current specification according to the correspondence between the static pressure and the current and the first output current.

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

[0128] S352, determining the second static pressure resistance corresponding to the current first resistance component under the fan of the current specification according to the correspondence 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 between the static pressure and the current, and the static pressure is taken 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 can be taken as the first resistance generated by the current first resistance component under the fan of the current specification.

[0132] The first static pressure resistance and the second static pressure resistance determined by the embodiment according to the correspondence 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 the current specification according to the first static pressure resistance and the second static pressure resistance comprises: taking the difference between the second static pressure resistance and the first static pressure resistance as the first resistance.

[0134] Specifically, taking the difference between the second static pressure resistance and the first static pressure resistance as the first resistance can make the determination method of the first resistance simple and fast. The embodiment improves the efficiency of determining the first resistance under the condition of ensuring the determination accuracy of the first resistance, thereby improving the efficiency of determining the fan suitable for the environmental test chamber.

[0135] Optionally, determining the estimated wind field resistance when the environmental test chamber is provided with at least one second resistance component according to the first resistance corresponding to each first resistance component under each specification of fan comprises the following steps:

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

[0137] Specifically, continuing to refer to Table 1, each first resistance component under each specification of fan corresponds to a first resistance. Table 1 can be a kind of wind resistance database.

[0138] The first resistance of the resistance component of each size and the fan of each specification can be used to predict the first resistance of the resistance component that has not been tested. For example, under the specification b1, the first resistance of the evaporator of size 5 is 20, the first resistance of the evaporator of size 6 is 25, and the first resistance of the evaporator of size 7 is 30. The first resistance of the evaporator of size 8 under the specification b1 can be predicted to be 35, and the first resistance of the evaporator of size 8 is placed in the wind resistance database of Table 1 to form a new wind resistance database.

[0139] The wind resistance database includes the first resistance of different first resistance components and different specifications of the fan. The wind resistance database can be used to quickly determine the estimated wind field resistance and improve the determination efficiency.

[0140] S132, determining the estimated wind field resistance of the set environment test chamber including at least one second resistance component according to the wind resistance database and the at least one second resistance component.

[0141] Specifically, the first resistance corresponding to the first resistance component 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, the fan suitable for the set environment test chamber is determined according to the estimated wind field resistance, including the following steps:

[0143] S141, determining the required air volume of the set environment test chamber.

[0144] Specifically, the required air volume of the set environment test chamber can be determined according to the size, function, etc. of the set environment test chamber.

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

[0146] Specifically, the corresponding relationship between the static pressure and the air volume corresponding to each specification of the fan can be obtained by testing the fan. The corresponding relationship between the static pressure and the air volume can be obtained by finding the air volume corresponding to the static pressure equal to the estimated wind field resistance in the corresponding relationship between the static pressure and the air volume.

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

[0148] Specifically, the estimated air volume corresponding to the static pressure equal to the estimated wind field resistance is found in each corresponding relationship between the static pressure and the air volume, and the estimated air volume closest to the required air volume is determined according to the estimated air volume, and then the fan corresponding to the estimated air volume is used as the fan suitable for the set environment test chamber.

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

[0150] Specifically, the plurality of different specifications of the evaporators are because the size of the evaporator has a greater impact on the air resistance of the evaporator. The embodiment can determine the first resistance corresponding to the evaporator of different specifications, so that when determining the estimated wind field resistance of the environmental test chamber, the determination accuracy of the estimated wind field resistance can be improved when the environmental test chamber includes the evaporator related to the plurality of first resistance components, thereby improving the determination accuracy of the fan adapted to the environmental test chamber.

[0151] Optionally, the specification of the simulation environmental test chamber is the same as that of the set environmental test chamber.

[0152] Specifically, the chamber body of the environmental test chamber also generates air resistance, and the air resistance of different environmental test chambers can be different. The embodiment sets the specification of the simulation environmental test chamber to be the same as that of the set environmental test chamber, so that the air resistance generated by the chamber body of the simulation environmental test chamber is the same as that generated by the chamber body of the set environmental test chamber, thereby avoiding the problem of inaccurate fan selection caused by different air resistance generated by the chamber body. In summary, the embodiment sets the specification of the simulation environmental test chamber to be the same as that 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 adapted to an environmental test chamber will be introduced with specific plurality of first resistance components and specific plurality of different specifications of the fan as an example. The plurality of first resistance components are an air duct plate, an air return mesh, a heater, a humidifier, a first size evaporator, and a second size evaporator. The specific process is as follows:

[0154] First, the P-I curve (static pressure-current curve) of the fan of specification 1 is measured at room temperature on the fan test platform, and then the fan is installed in the simulation environmental test chamber. In the case of installing only the fan of specification 1 in the simulation environmental test chamber, the chamber door is opened and only the fan is run. After stabilization, the current I0 of the motor in the fan is measured, and the corresponding static pressure resistance P0 is found by referring to the P-I curve. On this basis, only the air duct plate, the air return mesh, the heater, the humidifier, the first size evaporator, and the second size evaporator are added, respectively, and the fan is continued to be run with the chamber door opened. After stabilization, the motor currents I1, I3, I5, I6, I7, and I8 are measured, and the corresponding static pressure resistances P1, P3, P5, P6, P7, and P8 are found by referring to the P-I curve. Then, the wind field resistances corresponding to the components are 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, the fan of specification 2 is replaced, and the above steps are repeatedly executed, and finally the P 1-0 , P 3-0 , P 5-0 , P 6-0 , P 7-0 , P 8-0 The estimated wind field resistance of the environmental test chamber is determined, the air volume required by the environmental test chamber is determined according to the estimated wind field resistance, and the fan suitable for the environmental test chamber is determined according to the air volume.

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

[0156] Figure 5 is a structural schematic diagram of a fan determination device for an environmental test chamber provided by an embodiment of the present application, referring to Figure 5 , the fan determination device provided by the embodiment includes a selection module 210, a component resistance determination module 220, a wind field resistance determination module 230, and a fan determination module 240.

[0157] The selection module 210 is used to select a plurality of different specifications of fans 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 fan in the simulation environmental test chamber.

[0159] The wind field resistance determination module 230 is used to determine the estimated wind field resistance of the environmental test chamber including at least one second resistance component according to the first resistance of each first resistance component under each specification of fan; wherein the function of the second resistance component is the same as that of at least one first resistance component in the plurality of first resistance components.

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

[0161] The fan determination device for the environmental test chamber provided by the embodiment has corresponding beneficial effects with the fan determination method for the environmental test chamber provided by any embodiment of the present application, and the technical details are not detailed in the embodiment, and are described in detail in the fan determination method for the environmental test chamber provided by any embodiment of the present application.

[0162] It should be understood that the various forms of flow illustrated above can be used to reorder, add or delete steps. For example, the steps described in the present application can be performed in parallel, in series, in a different order, or any combination thereof, as long as the desired results of the technical solutions of the present application can be achieved, which are not limited herein.

[0163] The above detailed description does not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for determining the fan suitable for an environmental test chamber, characterized in that, The method comprises: selecting a plurality of different specifications of fans and a plurality of first resistance components; determining a first resistance generated by each of the first resistance components under each specification of fan in a simulation environment test chamber; determining an estimated wind field resistance when the simulation environment test chamber includes at least one second resistance component according to the corresponding first resistance of each of the first resistance components under each specification of fan; wherein the second resistance component has the same function as at least one of the first resistance components; determining a fan suitable for the simulation environment test chamber according to the estimated wind field resistance; the determining of the first resistance generated by each of the first resistance components under each specification of fan in the simulation environment test chamber comprises: determining the first resistance generated by each of the first resistance components under a current specification of fan in the simulation environment test chamber; detecting whether the first resistance generated by each of the first resistance components under each specification of fan in the simulation environment test chamber has been determined; if not, replacing the fan in the simulation environment test chamber, and then returning to the step of determining the first resistance generated by each of the first resistance components under the current specification of fan in the simulation environment test chamber; the simulation environment test chamber includes a chamber body and a chamber door; the determining of the first resistance generated by each of the first resistance components under the current specification of fan in the simulation environment test chamber comprises: determining a corresponding relationship between static pressure and current when the fan of the current specification is located outside the chamber body; determining a first output current when the fan of the current specification is in a stable state while being located inside the chamber body and the chamber door being open; determining a second output current when the fan of the current specification and a current first resistance component are in a stable state while being located inside the chamber body and the chamber door being open; determining the first resistance generated by the current first resistance component under the fan of the current specification according to the corresponding relationship between static pressure and current, the first output current and the second output current.

2. The method of claim 1, wherein the determining of the first resistance generated by each of the first resistance components under the current specification of fan in the simulation environment test chamber further comprises: detecting whether the first resistance generated by each of the first resistance components under the fan of the current specification in the chamber body has been determined; if not, replacing the first resistance component in the chamber body, and then returning to the step of determining the second output current when the fan of the current specification and a current first resistance component are in a stable state while being located inside the chamber body and the chamber door being open.

3. The method of claim 1, wherein the determining of the corresponding relationship between static pressure and current when the fan of the current specification is located outside the chamber body comprises: determining the corresponding relationship between static pressure and current when the fan of the current specification is located outside the chamber body at a set temperature value; the determining of the first output current when the fan of the current specification is in a stable state while being located inside the chamber body and the chamber door being open comprises: determining the first output current when the fan of the current specification is in a stable state while being located inside the chamber body and the chamber door being open at a temperature in the chamber body being the set temperature value; The second output current of the fan in the stable state when the fan of the current specification and a current first resistance component are located in the cabinet and the cabinet door is open is determined, including: The second output current of the fan in the stable state when the fan of the current specification and a current first resistance component are located in the cabinet and the cabinet door is open is determined when the temperature in the cabinet is the set temperature value.

4. The method of claim 1, wherein 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 corresponding to the fan of the current specification and the second static pressure resistance corresponding to the current first resistance component under the fan of the current specification, including: The first static pressure resistance corresponding to the fan of the current specification is determined according to the corresponding relationship between the static pressure and the current and the first output current. The second static pressure resistance corresponding to the current first resistance component under the fan of the current specification is determined according to the corresponding relationship between the static pressure and the current and the second output current. 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.

5. The method of claim 4, wherein, 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, including: The difference between the second static pressure resistance and the first static pressure resistance is taken as the first resistance.

6. The method of claim 1, wherein The estimated wind field resistance when the set environmental test chamber includes at least one second resistance component is determined according to the first resistance generated by each first resistance component under the fan of each specification, including: A wind resistance database is established according to each first resistance component, the fan of different specifications and each first resistance. The estimated wind field resistance when the set environmental test chamber includes at least one second resistance component is determined according to the wind resistance database and the at least one second resistance component.

7. The method of claim 1, wherein The fan adapted to the set environmental test chamber is determined according to the estimated wind field resistance, including: The required air volume of the set environmental test chamber is determined. The corresponding relationship between the static pressure and the air volume corresponding to each specification of the fan is obtained. The 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.

8. The fan determination method according to any one of claims 1 to 7, characterized in that, The plurality of first resistance components include air duct plates, return air mesh openings, heaters, humidifiers and a plurality of evaporators of different specifications, wherein the sizes of the evaporators of different specifications are different. And / or, the specification of the simulation environmental test chamber is the same as the specification of the set environmental test chamber.

9. A blower determination device for an environmental test chamber, capable of performing the blower determination method according to any one of claims 1 to 8, characterized by The simulation environmental test chamber includes a selection module, a component resistance determination module, a wind field resistance determination module and a fan 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 first resistance component under each specification of the fan in the simulation environmental test chamber. The component resistance determination module is used to determine the first resistance generated by each first resistance component under each specification of the fan in the simulation environmental test chamber. The wind field resistance determination module is configured to determine an estimated wind field resistance of the environmental test chamber including at least one second resistance component according to the first resistance of each first resistance component corresponding to each fan of each specification; wherein the second resistance component has the same function as at least one of the first resistance components in the plurality of first resistance components. The fan determination module is configured to determine a fan suitable for the environmental test chamber according to the estimated wind field resistance.

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