A testing device and method for air-heating PTC products

Abstract

The present invention discloses a testing device and method for air-heating PTC products. The testing device for air-heating PTC products includes an air duct, a fan, an inlet temperature detection component, an outlet wind speed detection component, an outlet temperature detection component and an adjustment mechanism; the fan is arranged in the air duct, and the air duct has a placement area for placing the air-heating PTC product to be tested; the air duct has an inlet and an outlet, the inlet temperature detection component is arranged on the air duct between the placement area and the inlet, and the inlet temperature detection component is used to detect the inlet temperature; the outlet wind speed detection component and the outlet temperature detection component are arranged on the air duct between the placement area and the outlet, the outlet wind speed detection component is used to detect the outlet wind speed, and the outlet temperature detection component is used to detect the outlet temperature; the adjustment mechanism is used to adjust the cross-sectional area of ​​the air duct. By adopting the above scheme, the beneficial effect of being able to simultaneously meet the test of air-heating PTC products with different structures and different heat dissipation areas on the same testing device is achieved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of testing devices, and in particular to a testing device and method for an air-heating PTC product. Background Art

[0002] Based on the current development status of new energy vehicles, the demand for auto parts is increasing, among which thermal management modules are more prominent. Compared with household air conditioners, the use environment and requirements of car air conditioners are more stringent, which has given rise to a heater. According to the different heating media, it is divided into air-heating heaters, referred to as air-heating PTC, and water-heating heaters, referred to as water-heating PTC.

[0003] At present, for air-heating PTC products, it is difficult to simultaneously meet the testing problems of air-heating PTC products with different structures and different heat dissipation areas on the same test device. Summary of the invention

[0004] The present invention provides a testing device and method for an air-heating PTC product, so as to solve the problem of testing air-heating PTC products with different structures and different heat dissipation areas on the same testing device.

[0005] According to one aspect of the present invention, a test device for an air-heating PTC product is provided, the test device for an air-heating PTC product comprising an air duct, a fan, an inlet temperature detection element, an outlet wind speed detection element, an outlet temperature detection element and an adjustment mechanism;

[0006] The fan is arranged in the air duct, and the air duct has a placement area for placing the air-heating PTC product to be tested;

[0007] The air duct has an inlet and an outlet, the inlet temperature detection element is arranged on the air duct between the placement area and the inlet, and the inlet temperature detection element is used to detect the inlet temperature;

[0008] The outlet wind speed detection member and the outlet temperature detection member are arranged on the air duct between the placement area and the outlet, the outlet wind speed detection member is used to detect the outlet wind speed, and the outlet temperature detection member is used to detect the outlet temperature;

[0009] The regulating mechanism is used to adjust the cross-sectional area of ​​the air duct.

[0010] In an optional embodiment of the present invention, the adjustment mechanism is at least one of the following:

[0011] An axial adjustment component, the axial adjustment component is used to adjust the axial area of ​​the air duct;

[0012] A longitudinal adjustment component is used to adjust the longitudinal area of ​​the air duct.

[0013] In an optional embodiment of the present invention, the axial adjustment assembly includes a base, an axial lifting platform and a lifting unit;

[0014] The axial lifting platform can be lifted and lowered in the axial direction and is arranged in the air duct, with one end being flush with the inlet and the other end being flush with the outlet;

[0015] The axial lifting platform is arranged on the base, and the lifting unit is used for driving the axial lifting platform to lift and lower in the axial direction.

[0016] In an optional embodiment of the present invention, the lifting unit includes a threaded lifting rod and a threaded sleeve threadedly sleeved on the threaded lifting rod;

[0017] The threaded sleeve is fixedly connected to the base;

[0018] The end of the threaded lifting rod is fixedly connected to the axial lifting platform, and the length direction of the threaded lifting rod is axial.

[0019] In an optional embodiment of the present invention, the axial adjustment assembly further includes a support platform, a support rod and a guide unit;

[0020] The guide unit comprises a guide slide rod and a slide sleeve sleeved on the guide slide rod, and one end of the guide slide rod is fixedly connected to the base;

[0021] The sliding sleeve is fixedly connected to the support platform, the axial lifting platform is arranged at an end of the support platform closer to the air duct, and the end of the threaded lifting rod is fixedly connected to the support platform;

[0022] One end of the support rod is fixedly connected to the support platform, and the other end of the support rod is fixedly connected to the axial lifting platform;

[0023] The length directions of the guide slide rod and the support rod are both axial.

[0024] In an optional embodiment of the present invention, the longitudinal adjustment assembly includes a sealing fixture and a longitudinal wind flow baffle;

[0025] The air duct has a through opening in the longitudinal direction, and the longitudinal wind flow baffle is inserted into the interior of the air duct along the longitudinal direction through the through opening. The sealing fixing piece is arranged in the gap between the longitudinal wind flow baffle and the wall of the air duct, and is used for sealing the gap and fixing the longitudinal wind flow baffle.

[0026] In an optional embodiment of the present invention, the inlet temperature detection member includes an inlet temperature sensor;

[0027] And / or, the outlet wind speed detection component includes an outlet wind speed sensor;

[0028] And / or, the outlet temperature detection member includes an outlet temperature sensor;

[0029] And / or, the inlet of the air duct is provided with an inlet fairing, and the diameter of the inlet fairing gradually decreases from an end far from the inlet to an end close to the inlet; the outlet of the air duct is provided with an outlet fairing, and the diameter of the outlet fairing gradually increases from an end close to the outlet to an end far from the outlet.

[0030] In an optional embodiment of the present invention, the test device for the air-heating PTC product further includes a temperature box, a temperature-lowering mechanism, and a temperature-raising mechanism;

[0031] The cooling mechanism includes a compressor, a condenser, a throttling device, an evaporator, a first air supply fan and a second air supply fan;

[0032] The compressor, the condenser, the throttling device and the evaporator form a loop;

[0033] The air outlet of the first air supply fan faces the condenser, and the air outlet of the second air supply fan faces the evaporator;

[0034] The temperature increasing mechanism comprises a heater and a third air supply fan, and the air outlet of the third air supply fan faces the heater;

[0035] The air duct, the second air supply fan, the evaporator, the third air supply fan and the heater are all arranged in the temperature box;

[0036] The temperature box is also provided with an in-box temperature detection component, and the in-box temperature detection component is used to detect the temperature of the temperature box.

[0037] According to another aspect of the present invention, a test method for an air-heating PTC product is provided, which is applied to the test device for an air-heating PTC product according to any embodiment of the present invention. The test method for an air-heating PTC product specifically includes:

[0038] Get inlet air temperature, outlet air temperature and outlet air speed;

[0039] The product heat exchange efficiency is determined based on the inlet air temperature, the outlet air temperature and the outlet air speed.

[0040] In an optional embodiment of the present invention, determining the product heat exchange efficiency based on the inlet air temperature, the outlet air temperature and the outlet air speed includes:

[0041] The product heat exchange efficiency is determined by the following formula:

[0042] η=[vout*t*S*ρ*c*(Tout-Tin)*t] / (VH*IH+VL*IL);

[0043] Among them, S is the product heat exchange area, t is the assumed ventilation time, ρ is the air density, c is the specific heat capacity of air, Tin is the inlet air temperature, Tout is the outlet air temperature, vout is the outlet air speed, VH is the high voltage input voltage, IH is the high voltage bus current, VL is the low voltage input voltage, and IL is the low voltage consumption current.

[0044] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0045] at least one processor; and

[0046] a memory communicatively connected to the at least one processor; wherein,

[0047] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the test method of the air-heating PTC product described in any embodiment of the present invention.

[0048] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions for enabling a processor to implement the method for testing an air-heating PTC product according to any embodiment of the present invention when the computer instructions are executed.

[0049] The technical solution of the embodiment of the present invention is to set an air duct, a fan, an inlet temperature detection member, an outlet wind speed detection member, an outlet temperature detection member and an adjustment mechanism, wherein the fan is arranged in the air duct, and the air duct has a placement area for placing the air-heating PTC product to be tested; the air duct has an inlet and an outlet, the inlet temperature detection member is arranged on the air duct between the placement area and the inlet, the inlet temperature detection member is used to detect the inlet temperature, the outlet wind speed detection member and the outlet temperature detection member are arranged on the air duct between the placement area and the outlet, the outlet wind speed detection member is used to detect the outlet wind speed, the outlet temperature detection member is used to detect the outlet temperature, and the adjustment mechanism is used to adjust the cross-sectional area of ​​the air duct. Therefore, when it is necessary to test air-heating PTC products with different structures and different heat dissipation areas, the cross-sectional area of ​​the air duct can be adjusted, so as to solve the problem of simultaneously meeting the test requirements of air-heating PTC products with different structures and different heat dissipation areas on the same test device, and achieve the beneficial effect of being able to simultaneously meet the test requirements of air-heating PTC products with different structures and different heat dissipation areas on the same test device.

[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 following briefly introduces the drawings required for use in the description of the embodiments. 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 A schematic diagram of the structure of a test device for an air-heating PTC product provided in the first embodiment of the present invention;

[0053] Figure 2 yes Figure 1 Schematic diagram of the cross section of the middle wind channel along the wind direction;

[0054] Figure 3 It is a structural schematic diagram of another test device for air-heating PTC products provided in the first embodiment of the present invention;

[0055] Figure 4 A flow chart of a method for testing an air-heating PTC product provided in the second embodiment of the present invention;

[0056] Figure 5 A peripheral circuit block diagram of a wind-heating PTC product to be tested when it is working, provided in Embodiment 2 of the present invention;

[0057] Figure 6 A structural block diagram of a test system for an air-heating PTC product provided in Embodiment 3 of the present invention;

[0058] Figure 7 It is a schematic diagram of the structure of an electronic device for implementing the test method of the air-heating PTC product of the embodiment of the present invention.

[0059] Among them: 1. air duct; 101. inlet; 102. outlet; 2. fan; 3. inlet temperature detection element; 4. outlet wind speed detection element; 5. outlet temperature detection element; 6. axial adjustment component; 61. base; 62. axial lifting platform; 63. lifting unit; 631. threaded lifting rod; 632. threaded sleeve; 64. support platform; 65. support rod; 66. guide unit; 661. guide slide rod; 662. slide sleeve; 7. longitudinal air flow baffle; 8. cooling mechanism; 8 1. Compressor; 82. Condenser; 83. Throttling device; 84. Evaporator; 85. First air supply fan; 86. Second air supply fan; 9. Heating mechanism; 91. Heater; 92. Third air supply fan; 10. Temperature box; 11. Temperature detection element in the box; 12. Upper control computer; 13. High voltage power supply; 14. Low voltage power supply; 15. Communication module; 16. Inlet fairing; 17. Outlet fairing; 18. Placement area; 20. Air-heating PTC product to be tested. DETAILED DESCRIPTION

[0060] 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.

[0061] 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.

[0062] Embodiment 1

[0063] Figure 1 A structural schematic diagram of a test device for a wind-heating PTC product is provided for the first embodiment of the present invention. Figure 1 As shown, the test device of the air-heating PTC product includes an air duct 1, a fan 2, an inlet temperature detection component 3, an outlet wind speed detection component 4, an outlet temperature detection component 5 and an adjustment mechanism.

[0064] The fan 2 is arranged in the air duct 1, and the air duct 1 has a placement area 18 for placing the air-heating PTC product 20 to be tested; wherein, the air duct 1 refers to a channel for air circulation, and the fan 2 can make the air flow inside the air duct 1, and the placement area 18 refers to the area inside the air duct 1 for placing the air-heating PTC product 20 to be tested.

[0065] The air duct 1 has an inlet 101 and an outlet 102. The inlet temperature detection component 3 is arranged on the air duct 1 between the placement area 18 and the inlet 101. The inlet temperature detection component 3 is used to detect the inlet temperature. Among them, the inlet 101 refers to the opening for air to enter the inside of the air duct 1, and the outlet 102 refers to the opening for air to flow out of the inside of the air duct 1. The fan 2 can allow air to enter the air duct 1 from the inlet 101, and then pass through the wind-heating PTC product 20 to be tested placed in the placement area 18 and then be discharged from the air duct 1 from the outlet 102, which has the effect of air circulation inside the air duct 1. The inlet temperature detection component 3 refers to a component that can detect temperature. Since the inlet temperature detection component 3 is arranged on the air duct 1 between the placement area 18 and the inlet 101, when the wind-heating PTC product 20 to be tested is placed in the placement area 18, the inlet temperature detection component 3 can detect the air temperature that is not heated by the wind-heating PTC product 20 to be tested, that is, it can detect the air temperature near the inlet 101. The inlet temperature detection member 3 can be fixedly arranged on the inner wall of the air duct 1, and the fixing method can be various, such as bolt fixing, adhesive fixing, clamping fixing, etc., which are not specifically limited here. The inlet temperature detection member 3 can also have a detection part. The inlet temperature detection member 3 can be fixed on the outer wall of the air duct 1, but the detection part is inserted into the inside of the air duct 1 to detect the temperature. There are various installation positions and specific installation methods for the inlet temperature detection member 3, which are not specifically limited here, as long as the air temperature between the placement area 18 and the inlet 101 can be detected.

[0066] The outlet wind speed detection component 4 and the outlet temperature detection component 5 are arranged on the air duct 1 between the placement area 18 and the outlet 102. The outlet wind speed detection component 4 is used to detect the outlet wind speed, and the outlet temperature detection component 5 is used to detect the outlet temperature. Among them, the outlet wind speed detection component 4 refers to a component that can detect the wind speed, and the outlet temperature detection component 5 refers to a component that can detect the temperature. Since the outlet wind speed detection component 4 and the outlet temperature detection component 5 are arranged on the air duct 1 between the placement area 18 and the outlet 102, when the wind-heating PTC product 20 to be tested is placed in the placement area 18, the outlet temperature detection component 5 can detect the air temperature after being heated by the wind-heating PTC product 20 to be tested, and the outlet wind speed detection component 4 can detect the wind speed after being heated by the wind-heating PTC product 20 to be tested, that is, the outlet wind speed detection component 4 and the outlet temperature detection component 5 can respectively detect the wind speed and temperature near the outlet 102.

[0067] When testing air-heating PTC products, the heat transfer efficiency is tested. The heat transfer efficiency is the efficiency of the heat transfer process obtained by comparing the total heat loss dissipated in the entire flow heat transfer area with the heat transfer amount. Therefore, the heat transfer efficiency can be easily determined based on the data that needs to be tested, such as the inlet temperature, outlet wind speed, outlet temperature, and some known data.

[0068] The adjustment mechanism is used to adjust the cross-sectional area of ​​the air duct 1. Since the air in the air duct 1 is heated by the air-heating PTC product 20 to be tested, and then the heat exchange efficiency is determined, the cross-sectional area of ​​the air duct 1 is positively correlated with the heat dissipation area. Therefore, by adjusting the cross-sectional area of ​​the air duct 1, the heat dissipation area of ​​the air duct 1 can be adjusted. At the same time, during the test, the air in the air duct 1 needs to pass through the air-heating PTC product 20 to be tested. Therefore, when the size of the air-heating PTC product 20 to be tested is different, the cross-sectional area required for the air duct 1 will also be different.

[0069] The above scheme is provided with an air duct 1, a fan 2, an inlet temperature detection element 3, an outlet wind speed detection element 4, an outlet temperature detection element 5 and an adjusting mechanism. The fan 2 is arranged in the air duct 1, and the air duct 1 has a placement area 18 for placing the air-heating PTC product 20 to be tested; the air duct 1 has an inlet 101 and an outlet 102, the inlet temperature detection element 3 is arranged on the air duct 1 between the placement area 18 and the inlet 101, the inlet temperature detection element 3 is used to detect the inlet temperature, the outlet wind speed detection element 4 and the outlet temperature detection element 5 are arranged on the air duct 1 between the placement area 18 and the outlet 102, the outlet wind speed detection element 4 is used to detect the outlet wind speed, the outlet temperature detection element 5 is used to detect the outlet temperature, and the adjusting mechanism is used to adjust the cross-sectional area of ​​the air duct 1. Therefore, when it is necessary to test air-heating PTC products with different structures and different heat dissipation areas, the cross-sectional area of ​​the air duct 1 can be adjusted to solve the problem of testing air-heating PTC products with different structures and different heat dissipation areas on the same test device.

[0070] Exemplarily, the inlet temperature detection component 3 includes an inlet temperature sensor.

[0071] Exemplarily, the outlet temperature detection component 5 includes an outlet temperature sensor.

[0072] The temperature transducer refers to a sensor that can sense temperature and convert it into a usable output signal. The inlet temperature sensor refers to a temperature sensor disposed near the inlet 101, and the outlet temperature sensor refers to a temperature sensor disposed near the outlet 102. By disposing the inlet temperature sensor and the outlet temperature sensor, it is convenient to detect the temperature.

[0073] Exemplarily, the outlet wind speed detection component 4 includes an outlet wind speed sensor.

[0074] The wind speed sensor is a device used to measure wind speed, which is small and light, easy to carry and assemble. The outlet wind speed sensor refers to a wind speed sensor set on the air duct 1 between the placement area 18 and the outlet 102 for detecting wind speed. By setting the outlet wind speed sensor, it is easy to detect the wind speed.

[0075] In an optional embodiment of the present invention, the adjustment mechanism includes an axial adjustment component 6 , and the axial adjustment component 6 is used to adjust the axial area of ​​the air duct 1 .

[0076] The axial direction may be perpendicular to the direction of wind flow in the air duct 1, for example, in a specific embodiment, it may be vertical. By adjusting the axial area of ​​the air duct 1, the cross-sectional area of ​​the air duct 1 can be changed, thereby solving the problem of testing air-heating PTC products with different structures and different heat dissipation areas on the same test device.

[0077] Based on the above embodiment, the axial adjustment component 6 includes a base 61, an axial lifting platform 62 and a lifting unit 63; the axial lifting platform 62 can be set in the air duct 1 along the axial direction, and one end is flush with the inlet 101, and the other end is flush with the outlet 102; the axial lifting platform 62 is set on the base 61, and the lifting unit 63 is used to drive the axial lifting platform 62 to rise and fall along the axial direction.

[0078] In which, in a specific embodiment, the axial direction may be a vertical direction, in which case the base 61 may be located below the air duct 1, and the lifting unit 63 refers to a unit that can drive the axial lifting platform 62 to lift and lower along the axial direction. The axial lifting platform 62 is driven to lift and lower by the lifting unit 63. Since the two ends of the axial lifting platform 62 are respectively flush with the inlet 101 and the outlet 102, the axial area of ​​the air duct 1 will also be reduced accordingly when the axial lifting platform 62 is lifted and lowered, thereby achieving the effect of adjusting the axial area of ​​the air duct 1. Since the cross-sectional area of ​​the air duct 1 is mainly composed of the axial area and the longitudinal area, the cross-sectional area of ​​the air duct 1 can be adjusted by adjusting the axial area of ​​the air duct 1.

[0079] Exemplarily, the lifting unit 63 includes a threaded lifting rod 631 and a threaded sleeve 632; the threaded sleeve 632 is arranged on the threaded lifting rod 631; the threaded sleeve 632 is fixedly connected to the base 61; the end of the threaded lifting rod 631 is fixedly connected to the axial lifting platform 62, and the length direction of the threaded lifting rod 631 is axial.

[0080] Among them, the threaded lifting rod 631 refers to a rod with external threads, and the threaded sleeve 632 refers to a sleeve that is sleeved outside the threaded lifting rod 631 and is threadedly adapted to the threaded lifting rod 631. There are many ways to fix the threaded sleeve 632 with the base 61 and the ways to fix the end of the threaded lifting rod 631 with the axial lifting platform 62, such as welding fixation, bolt fixation, bonding fixation, clamping fixation, etc., and no specific limitation is made here. When the threaded lifting rod 631 rotates in different directions, since the threaded sleeve 632 is fixedly connected to the base 61, the end of the threaded lifting rod 631 will rise and fall relative to the base 61, and the end of the threaded lifting rod 631 is fixedly connected to the axial lifting platform 62, so at this time the axial lifting platform 62 will rise and fall relative to the base 61, and since the length direction of the threaded lifting rod 631 is axial, the axial lifting platform 62 will rise and fall axially relative to the base 61, thereby achieving the effect of adjusting the axial area of ​​the air duct 1.

[0081] In addition, in a specific embodiment, a manual turntable can be fixedly provided at one end of the threaded lifting rod 631 away from the axial lifting platform 62. When the manual turntable rotates, the threaded lifting rod 631 can be driven to rotate. The manual turntable can increase the force-bearing area, so that the user can rotate it with less effort.

[0082] Specifically, the axial adjustment assembly 6 also includes a support platform 64, a support rod 65 and a guide unit 66; the guide unit 66 includes a guide slide rod 661 and a sliding sleeve 662 sleeved on the guide slide rod 661, and one end of the guide slide rod 661 is fixedly connected to the base 61.

[0083] The sliding sleeve 662 is fixedly connected to the support platform 64, the axial lifting platform 62 is arranged at the end of the support platform 64 closer to the air duct 1, and the end of the threaded lifting rod 631 is fixedly connected to the support platform 64; one end of the support rod 65 is fixedly connected to the support platform 64, and the other end of the support rod 65 is fixedly connected to the axial lifting platform 62.

[0084] The length directions of the guide slide rod 661 and the support rod 65 are both axial.

[0085] Among them, the guide slide bar 661 can be fixedly connected with the base 61 and the axial lifting platform 62 in various ways, such as welding fixation, bolt fixation, etc., which are not specifically limited here. Since the sleeve 662 is fixedly connected with the support platform 64, and the length direction of the guide slide bar 661 is axial, the sleeve 662 can only move in the axial direction under the restriction of the guide slide bar 661. That is, the support platform 64 can only move in the axial direction, and then the axial lifting platform 62 can only move in the axial direction under the restriction of the guide slide bar 661, thereby improving the accuracy of the movement.

[0086] In addition, by setting up the support rod 65, the support platform 64 can drive the axial lifting platform 62 to move axially more smoothly. The axial lifting platform 62 is directly driven to rise and fall through the threaded lifting rod 631, which may cause it to produce a certain offset angle. This can reduce the risk of producing an offset angle and improve the stability of the movement of the axial lifting platform 62.

[0087] Optionally, a side of the axial lifting platform 62 facing away from the supporting platform 64 has a curved surface, and the curved surface extends from both sides of the inlet 101 and the outlet 102 toward the middle.

[0088] Optionally, there are two guide slide bars 661 , and the two guide slide bars 661 are symmetrically arranged on the base 61 on both sides of the threaded lifting rod 631 . By arranging two guide slide bars 661 , a better limiting effect can be achieved.

[0089] Optionally, there are two support rods 65, and the two support rods 65 are symmetrically arranged on the support platform 64 on both sides of the threaded lifting rod 631. By setting two support rods 65, a better supporting effect can be played, thereby improving the stability of the movement of the axial lifting platform 62.

[0090] In an optional embodiment of the present invention, Figure 2 As shown, the adjustment mechanism includes a longitudinal adjustment component, and the longitudinal adjustment component is used to adjust the longitudinal area of ​​the air duct 1.

[0091] Among them, the longitudinal direction is perpendicular to the axial direction. By adjusting the longitudinal area of ​​the air duct 1, the cross-sectional area of ​​the air duct 1 can be changed, thereby solving the problem of testing air-heating PTC products with different structures and different heat dissipation areas on the same test device.

[0092] On the basis of the above-mentioned embodiment, the longitudinal adjustment component includes a sealing fixing (not shown in the figure) and a longitudinal airflow baffle 7; the air duct 1 has a through opening in the longitudinal direction (not shown in the figure), and the longitudinal airflow baffle 7 is inserted into the interior of the air duct 1 along the longitudinal direction through the through opening; the sealing fixing is arranged in the gap between the longitudinal airflow baffle 7 and the wall of the air duct 1, and is used to seal the gap and fix the longitudinal airflow baffle 7.

[0093] Among them, since the longitudinal wind flow baffle 7 is inserted into the air duct 1 longitudinally through the opening, the longitudinal area of ​​the air duct 1 will be different according to the different insertion depths of the longitudinal wind flow baffle 7, so you can adjust the longitudinal area by adjusting the insertion degree of the longitudinal wind flow baffle 7. At the same time, since the longitudinal wind flow baffle 7 can be inserted into the air duct 1 at different depths along the opening, there will be a gap between the longitudinal wind flow baffle 7 and the wall of the air duct 1 at the opening, and the sealing fixture refers to a component that can seal the gap and fix the longitudinal wind flow baffle 7. In a specific embodiment, the sealing fixture is sealing mud, and the use of sealing mud can better seal the gap between the longitudinal wind flow baffle 7 and the wall of the air duct 1 at the opening and fix the longitudinal wind flow baffle 7.

[0094] In addition, the size of the opening can also be comparable to the size of the wind-heating PTC product 20 to be tested, and the wind-heating PTC product 20 to be tested is placed into the air duct 1 through the opening.

[0095] When in use, the wind-heating PTC product 20 to be tested can be first placed into the air duct 1 through the opening, and then the longitudinal airflow baffle 7 can be moved to fit with the wind-heating PTC product 20 to be tested, and the gap between the longitudinal airflow baffle 7 and the wall of the air duct 1 at the opening can be sealed with sealing mud and the longitudinal airflow baffle 7 can be fixed, so as to control the size of the longitudinal area.

[0096] In an optional embodiment of the present invention, Figure 1 As shown, the inlet 101 of the air duct 1 is provided with an inlet fairing 16, and the diameter of the inlet fairing 16 gradually decreases from the end far away from the inlet 101 to the end close to the inlet 101; the outlet 102 of the air duct 1 is provided with an outlet fairing 17, and the diameter of the outlet fairing 17 gradually increases from the end close to the outlet 102 to the end far away from the outlet 102.

[0097] Among them, the inlet fairing 16 and the outlet fairing 17 can be trumpet-shaped. Since the diameter of the inlet fairing 16 gradually decreases from the end far away from the inlet 101 to the end close to the inlet 101, the flowing gas can be better guided to enter the air duct 1 from the inlet 101. Since the diameter of the outlet fairing 17 gradually increases from the end close to the outlet 102 to the end far away from the outlet 102, the flowing gas can be better discharged from the outlet 102 through the outlet fairing 17.

[0098] In an optional embodiment of the present invention, Figure 3 As shown, the test device for the air-heating PTC product also includes a temperature box 10 , a temperature reduction mechanism 8 and a temperature increase mechanism 9 .

[0099] The cooling mechanism 8 includes a compressor 81, a condenser 82, a throttling device 83, an evaporator 84, a first air supply fan 85 and a second air supply fan 86; the compressor 81, the condenser 82, the throttling device 83 and the evaporator 84 form a loop; the air outlet of the first air supply fan 85 faces the condenser 82, and the air outlet of the second air supply fan 86 faces the evaporator 84. Among them, the evaporator 84 absorbs low-temperature and low-pressure gas (refrigerant) to become high-temperature and high-pressure gas, and after passing through the condenser 82, it condenses to form liquid and releases heat, and the heat is taken away by the first air supply fan 85. After passing through the throttling device 83, the high-pressure liquid forms a low-pressure liquid, and passes through the evaporator 84 to become a low-temperature and low-pressure gas, and finally returns to the compressor 81. The refrigerant absorbs heat in the evaporator 84 to complete the gasification process and absorb heat, and the cold is sent to the temperature box 10 through the second air supply fan 86 to achieve the purpose of refrigeration, that is, to reduce the temperature inside the temperature box 10.

[0100] Optionally, the throttling device 83 may be a throttle valve.

[0101] The heating mechanism 9 includes a heater 91 and a third air supply fan 92, and the air outlet of the third air supply fan 92 faces the heater 91; the air duct 1, the second air supply fan 86, the evaporator 84, the third air supply fan 92 and the heater 91 are all arranged in the temperature box 10; wherein, when voltage is applied to both ends of the heater 91, the heater 91 will be heated, and finally the heat is brought to the inside of the temperature box 10 through the third air supply fan 92, thereby increasing the temperature inside the temperature box 10.

[0102] The temperature box 10 is also provided with an in-box temperature detection member 11, which is used to detect the temperature of the temperature box 10. The in-box temperature detection member 11 refers to a component that can detect the temperature inside the temperature box 10. In a specific embodiment, the in-box temperature detection member 11 can be a temperature sensor.

[0103] By the above method, the temperature inside the temperature box 10 can be adjusted, so as to achieve the functional test of the wind-heating PTC product 20 to be tested under multiple temperature conditions. Optionally, the multiple temperature conditions can be -40 to 85°C.

[0104] Optionally, the cooling mechanism 8 and the heating mechanism 9 can be remotely controlled by a smart device to remotely adjust the temperature inside the temperature box 10. In addition, some control buttons can also be set to control the cooling mechanism 8 and the heating mechanism 9, so that the temperature inside the temperature box 10 can be directly adjusted. There are many ways to control the cooling mechanism 8 and the heating mechanism 9, which are not specifically limited here.

[0105] Embodiment 2

[0106] Figure 4A flow chart of a test method for a wind-heating PTC product provided in the second embodiment of the present invention. This embodiment can be applied to the test situation of a wind-heating PTC product. The method is applied to the test device of the wind-heating PTC product described in any embodiment of the present invention. The method can be executed by the test system of the wind-heating PTC product. The test method of the wind-heating PTC product can be implemented in the form of hardware and / or software. For example, a host computer that remotely communicates with the test device of the wind-heating PTC product can be set up, and the test method of the wind-heating PTC product can be executed by the host computer. A controller can also be set on the test device of the wind-heating PTC product, and the controller is electrically connected to the inlet temperature detection component, the outlet temperature detection component and the outlet wind speed detection component, and the test method of the wind-heating PTC product is executed by the controller. The test method of the wind-heating PTC product can be configured in an electronic device.

[0107] like Figure 4 As shown, the test method of the air-heating PTC product specifically includes:

[0108] S110, obtaining inlet air temperature, outlet air temperature and outlet air speed.

[0109] There are many ways to obtain the inlet air temperature, outlet air temperature and outlet wind speed, such as communicating with the inlet temperature detection component, outlet temperature detection component and outlet wind speed detection component of the test device of the air-heating PTC product through the bus, and remotely obtaining the inlet air temperature, outlet air temperature and outlet wind speed detected by the inlet temperature detection component, outlet temperature detection component and outlet wind speed detection component. In addition, a controller can also be set on the test device of the air-heating PTC product, and the controller is electrically connected to the inlet temperature detection component, outlet temperature detection component and outlet wind speed detection component to directly obtain the inlet air temperature, outlet air temperature and outlet wind speed detected by the inlet temperature detection component, outlet temperature detection component and outlet wind speed detection component.

[0110] S120. Determine the product heat exchange efficiency based on the inlet air temperature, the outlet air temperature and the outlet air speed.

[0111] Among them, the heat transfer efficiency is the efficiency of the heat transfer process obtained by comparing the total heat loss dissipated in the entire flow heat transfer area with the heat transfer amount. Therefore, the heat transfer efficiency can be easily obtained based on the data that need to be tested, such as the inlet temperature, outlet wind speed, outlet temperature, and some known data.

[0112] On the basis of the above embodiment, the determining of the product heat exchange efficiency based on the inlet air temperature, the outlet air temperature and the outlet air speed includes:

[0113] The product heat exchange efficiency is determined by the following formula:

[0114] η=[vout*t*S*ρ*c*(Tout-Tin)*t] / (VH*IH+VL*IL);

[0115] Among them, S is the product heat exchange area, t is the assumed ventilation time, ρ is the air density, c is the specific heat capacity of air, Tin is the inlet air temperature, Tout is the outlet air temperature, vout is the outlet air speed, VH is the high voltage input voltage, IH is the high voltage bus current, VL is the low voltage input voltage, and IL is the low voltage consumption current.

[0116] Among them, Figure 5 As shown, the wind-heating PTC product to be tested can be controlled by the host computer. At this time, the host computer communicates with the wind-heating PTC product to be tested through the communication module. At the same time, the wind-heating PTC product to be tested usually requires a high-voltage power supply and a low-voltage power supply to provide high voltage and low voltage respectively for use. Therefore, the high-voltage input voltage, high-voltage bus current, low-voltage input voltage and low-voltage consumption current are usually known quantities, and the product heat exchange area, assumed ventilation time, air density and air specific heat capacity are also quantities that do not need to be obtained in the test. Therefore, by testing the wind-heating PTC product to be tested during the test to obtain the inlet air temperature, the outlet air temperature and the outlet wind speed and other data, the product heat exchange efficiency can be conveniently calculated according to the above formula.

[0117] Embodiment 3

[0118] Figure 6 This is a structural block diagram of a test system for an air-heating PTC product provided in Embodiment 3 of the present invention.

[0119] like Figure 6 As shown, the test system of the air heating PTC product includes:

[0120] The acquisition module 100 is used to obtain the inlet air temperature, the outlet air temperature and the outlet air speed.

[0121] The determination module 200 is used to determine the product heat exchange efficiency based on the inlet air temperature, the outlet air temperature and the outlet air speed.

[0122] Optionally, the product heat exchange efficiency is determined by the following formula:

[0123] η=[vout*t*S*ρ*c*(Tout-Tin)*t] / (VH*IH+VL*IL).

[0124] Among them, S is the product heat exchange area, t is the assumed ventilation time, ρ is the air density, c is the specific heat capacity of air, Tin is the inlet air temperature, Tout is the outlet air temperature, vout is the outlet air speed, VH is the high voltage input voltage, IH is the high voltage bus current, VL is the low voltage input voltage, and IL is the low voltage consumption current.

[0125] The test system for the air-heating PTC product provided in the embodiment of the present invention can execute the test method for the air-heating PTC product provided in any embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method.

[0126] Embodiment 4

[0127] Figure 7 A schematic diagram of the structure of an electronic device 310 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0128] like Figure 7 As shown, the electronic device 310 includes at least one processor 311, and a memory connected to the at least one processor 311 in communication, such as a read-only memory (ROM) 312, a random access memory (RAM) 313, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 311 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 312 or the computer program loaded from the storage unit 318 to the random access memory (RAM) 313. In the RAM 313, various programs and data required for the operation of the electronic device 310 can also be stored. The processor 311, the ROM 312, and the RAM 313 are connected to each other via a bus 314. An input / output (I / O) interface 315 is also connected to the bus 314.

[0129] A number of components in the electronic device 310 are connected to the I / O interface 315, including: an input unit 316, such as a keyboard, a mouse, etc.; an output unit 317, such as various types of displays, speakers, etc.; a storage unit 318, such as a disk, an optical disk, etc.; and a communication unit 319, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 319 allows the electronic device 310 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0130] The processor 311 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 311 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 311 executes the various methods and processes described above, such as the test method of the air-heating PTC product.

[0131] In some embodiments, the test method of the air-heating PTC product can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 318. In some embodiments, part or all of the computer program can be loaded and / or installed on the electronic device 310 via the ROM 312 and / or the communication unit 319. When the computer program is loaded into the RAM 313 and executed by the processor 311, one or more steps of the test method of the air-heating PTC product described above can be performed. Alternatively, in other embodiments, the processor 311 can be configured to execute the test method of the air-heating PTC product by any other appropriate means (for example, by means of firmware).

[0132] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0133] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0134] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0135] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0136] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0137] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0138] 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.

[0139] 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 test device for air-heating PTC products, characterized in that: It comprises an air duct (1), a fan (2), an inlet temperature detection element (3), an outlet wind speed detection element (4), an outlet temperature detection element (5) and an adjustment mechanism; The fan (2) is arranged in the air duct (1), and the air duct (1) has a placement area (18) for placing the wind-heating PTC product (20) to be tested; The air duct (1) has an inlet (101) and an outlet (102); the inlet temperature detection element (3) is arranged on the air duct (1) between the placement area (18) and the inlet (101); the inlet temperature detection element (3) is used to detect the inlet temperature; The outlet wind speed detection element (4) and the outlet temperature detection element (5) are arranged on the air duct (1) between the placement area (18) and the outlet (102), the outlet wind speed detection element (4) is used to detect the outlet wind speed, and the outlet temperature detection element (5) is used to detect the outlet temperature; The regulating mechanism is used to adjust the cross-sectional area of ​​the air duct (1); The regulating mechanism is at least one of the following: An axial adjustment component (6), the axial adjustment component (6) being used to adjust the axial area of ​​the air duct (1); A longitudinal adjustment component, the longitudinal adjustment component is used to adjust the longitudinal area of ​​the air duct (1); The axial adjustment assembly (6) comprises an axial lifting platform (62), a supporting platform (64) and a supporting rod (65); One end of the support rod (65) is fixedly connected to the support platform (64), and the other end of the support rod (65) is fixedly connected to the axial lifting platform (62); The axial adjustment assembly (6) further comprises a guide unit (66); The guide unit (66) comprises a guide slide rod (661) and a slide sleeve (662) sleeved on the guide slide rod (661); one end of the guide slide rod (661) is fixedly connected to the base (61); The sliding sleeve (662) is fixedly connected to the supporting platform (64), and the axial lifting platform (62) is arranged at an end of the supporting platform (64) closer to the air duct (1); The length directions of the guide slide rod (661) and the support rod (65) are both axial.

2. The test device for air-heating PTC products according to claim 1, characterized in that: The axial adjustment assembly (6) further comprises a base (61) and a lifting unit (63); The axial lifting platform (62) can be lifted and lowered in the axial direction and is arranged in the air duct (1), with one end being flush with the inlet (101) and the other end being flush with the outlet (102); The axial lifting platform (62) is arranged on the base (61), and the lifting unit (63) is used to drive the axial lifting platform (62) to lift and lower in the axial direction.

3. The test device for air-heating PTC products according to claim 2, characterized in that: The lifting unit (63) comprises a threaded lifting rod (631) and a threaded sleeve (632), wherein the threaded sleeve (632) is arranged on the threaded lifting rod (631); The threaded sleeve (632) is fixedly connected to the base (61); The end of the threaded lifting rod (631) is fixedly connected to the axial lifting platform (62), and the length direction of the threaded lifting rod (631) is axial.

4. The test device for air-heating PTC products according to claim 1, characterized in that: The longitudinal adjustment assembly comprises a sealing fixing member and a longitudinal air flow baffle (7); The air duct (1) has a through opening in the longitudinal direction, and the longitudinal air flow baffle (7) is inserted into the interior of the air duct (1) in the longitudinal direction through the through opening. The sealing fixing member is arranged in the gap between the longitudinal air flow baffle (7) and the wall of the air duct (1) and is used to seal the gap and fix the longitudinal air flow baffle (7).

5. The testing device for air-heating PTC products according to claim 1, characterized in that: The inlet temperature detection element (3) comprises an inlet temperature sensor; And / or, the outlet wind speed detection element (4) comprises an outlet wind speed sensor; And / or, the outlet temperature detection member (5) comprises an outlet temperature sensor; And / or, the inlet (101) of the air duct (1) is provided with an inlet fairing (16), the diameter of which gradually decreases from an end away from the inlet (101) to an end close to the inlet (101); and the outlet (102) of the air duct (1) is provided with an outlet fairing (17), the diameter of which gradually increases from an end close to the outlet (102) to an end away from the outlet (102).

6. The test device for air-heating PTC products according to claim 1, characterized in that: The test device for the air-heating PTC product further comprises a temperature box (10), a temperature-lowering mechanism (8) and a temperature-raising mechanism (9); The cooling mechanism (8) comprises a compressor (81), a condenser (82), a throttling device (83), an evaporator (84), a first air supply fan (85) and a second air supply fan (86); The compressor (81), the condenser (82), the throttling device (83) and the evaporator (84) form a loop; The air outlet of the first air supply fan (85) is directed toward the condenser (82), and the air outlet of the second air supply fan (86) is directed toward the evaporator (84); The temperature increasing mechanism (9) comprises a heater (91) and a third air supply fan (92), and the air outlet of the third air supply fan (92) faces the heater (91); The air duct (1), the second air supply fan (86), the evaporator (84), the third air supply fan (92) and the heater (91) are all arranged in the temperature box (10); The temperature box (10) is also provided with an in-box temperature detection component (11), and the in-box temperature detection component (11) is used to detect the temperature of the temperature box (10).

7. A method for testing an air-heating PTC product, applied to the testing device for an air-heating PTC product according to any one of claims 1 to 6, characterized in that: The test method of the air-heating PTC product specifically includes: Get inlet air temperature, outlet air temperature and outlet air speed; The product heat exchange efficiency is determined based on the inlet air temperature, the outlet air temperature and the outlet air speed.

8. The test method of the air-heating PTC product according to claim 7, characterized in that: The determining of the product heat exchange efficiency based on the inlet air temperature, the outlet air temperature and the outlet air speed comprises: The product heat exchange efficiency is determined by the following formula: η=[vout*t*S*ρ*c*(Tout-Tin)*t] / (VH*IH+VL*IL); Among them, S is the product heat exchange area, t is the assumed ventilation time, ρ is the air density, c is the specific heat capacity of air, Tin is the inlet air temperature, Tout is the outlet air temperature, vout is the outlet air speed, VH is the high voltage input voltage, IH is the high voltage bus current, VL is the low voltage input voltage, and IL is the low voltage consumption current.

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