A rapid temperature control device for a humidifying tank of a fuel cell test bench

Abstract

The present invention relates to the technical field of temperature control devices, and discloses a rapid temperature control device for a humidifying tank of a fuel cell test bench, comprising: a humidifying tank, a heating water tank, a cooling water tank, a pipeline, a circulating water pump, a solenoid valve group, a sensor group, an air intake pipe and a control module; the control module comprises a test sequence generation unit, a collection unit, a judgment unit and a processing unit; the processing unit is configured to control the solenoid valve group, start the circulating water pump, and collect the temperature data of the sensor group when determining the temperature control mode, and adjust the speed of the circulating water pump according to the temperature data of the sensor group; and is also configured to adjust the mesh electric heater according to the temperature data of the sensor group when determining that the pure water inside the humidifying tank is heated. The present invention can quickly and accurately control the temperature of the pure water inside the humidifying tank according to the operation requirements of the fuel cell test bench.

Description

Technical Field

[0001] The invention relates to the technical field of temperature control devices, and in particular to a rapid temperature control device for a humidifying tank of a fuel cell test bench. Background Art

[0002] The fuel cell test bench, as a test equipment specially used to evaluate the performance parameters of fuel cells, consists of key parts such as air supply system, hydrogen supply system, temperature control system, data acquisition and recording system, control system and electronic load. During the fuel cell test process, the supplied air and hydrogen must be humidified to ensure that their humidity reaches the predetermined test standard, so as to evaluate the power generation performance of the fuel cell under this standard.

[0003] Normally, the fuel cell test bench uses a water bath humidification method, that is, the gas is humidified through a humidification tank. A certain amount of pure water is pre-injected into the humidification tank, and the water is heated by an electric heater installed on the tank. When the pure water temperature reaches the set value, the gas can be introduced into the humidification tank for humidification. The temperature of pure water is usually controlled between 50 and 90 degrees Celsius.

[0004] Since the fuel cell test bench has a large demand for gas, in order to achieve the ideal humidification effect, it is usually necessary to inject hundreds of kilograms to one ton of pure water into the humidification tank. It takes a long time for the electric heater to heat this water, usually more than several hours. In order to reduce the heat loss of the humidification tank, insulation materials are usually installed on the outer surface of the tank. However, when it is necessary to reduce the humidity of the gas and lower the temperature of the pure water, the electric heater can only be turned off and the water temperature can be waited for naturally. At this time, the presence of insulation materials will significantly prolong the time required for the water temperature to drop.

[0005] Currently, the gas humidification tank of the fuel cell test bench has the problem of slow speed and long time in regulating the water temperature, which seriously affects the efficiency of the fuel cell test. Summary of the invention

[0006] In view of this, the present invention proposes a rapid temperature control device for a humidifying tank of a fuel cell test bench, aiming to solve the problem existing in the current technology that the water temperature adjustment speed of the humidifying tank is slow and time-consuming, thereby improving the efficiency of fuel cell testing.

[0007] The present invention proposes a rapid temperature control device for a humidifying tank of a fuel cell test bench, comprising:

[0008] A humidifying tank, a heating water tank, a cooling water tank, a pipeline, a circulating water pump, a solenoid valve group, a sensor group, an air inlet pipe and a control module, wherein the control module is electrically connected to the humidifying tank, the heating water tank, the cooling water tank, the pipeline, the circulating water pump, the solenoid valve group and the sensor group; wherein the heating water tank is provided with a plurality of mesh electric heaters, the cooling water tank is provided with a coil heat exchanger, and the water inlet end of the coil heat exchanger is provided with a chiller; the control module includes a test sequence generating unit, a collecting unit, a judging unit and a processing unit;

[0009] The test sequence generation unit is configured to set a test sequence before the fuel cell test bench is run, and determine the pure water temperature threshold value inside the humidification tank under different test steps according to the test sequence;

[0010] The acquisition unit is configured to acquire pure water temperature data inside the humidification tank in real time;

[0011] The judgment unit is configured to determine the temperature control mode of the pure water inside the humidification tank according to the pure water temperature data of the current test step and the pure water temperature threshold of the next test step; wherein the temperature control mode includes heating and cooling the pure water inside the humidification tank;

[0012] The processing unit is configured to control the solenoid valve group, start the circulating water pump, and collect temperature data of the sensor group when the temperature control mode is determined, and adjust the speed of the circulating water pump according to the temperature data of the sensor group; and is also configured to adjust the mesh electric heater according to the temperature data of the sensor group when it is determined that the pure water inside the humidification tank is heated.

[0013] Furthermore, the solenoid valve group includes:

[0014] A first branch is provided between the water outlet of the circulating water pump and the water inlet of the refrigeration water tank, and a first solenoid valve is provided on the first branch;

[0015] A second branch is provided between the water outlet of the refrigeration water tank and the pure water inlet of the humidification tank, and a second solenoid valve is provided on the second branch;

[0016] A third branch is provided between the water outlet of the circulating water pump and the water inlet of the heating water tank, and a third solenoid valve is provided on the third branch;

[0017] A fourth branch is provided between the water outlet of the heating water tank and the pure water inlet of the humidifying tank, and a fourth solenoid valve is provided on the fourth branch;

[0018] The output end of the second branch and the output end of the fourth branch are both connected to the pure water inlet of the humidification tank through a fifth branch, and a fifth solenoid valve is provided on the fifth branch;

[0019] A sixth branch is provided between the pure water outlet of the humidifying tank and the water inlet of the circulating water pump, and a sixth solenoid valve is provided on the sixth branch;

[0020] The fifth branch is connected to the sixth branch through a seventh branch, and a seventh solenoid valve is provided on the seventh branch.

[0021] Furthermore, the sensor group includes:

[0022] A liquid level sensor and a first temperature sensor are both located inside the humidification tank, and the first temperature sensor is used to collect the pure water temperature data;

[0023] A second temperature sensor and a third temperature sensor are respectively located at the water inlet end of the refrigeration water tank and inside the refrigeration water tank;

[0024] The fourth temperature sensor and the fifth temperature sensor are respectively located at the water inlet end of the heating water tank and inside the heating water tank.

[0025] Further, when determining the temperature control mode of the pure water inside the humidification tank according to the pure water temperature data of the current test step and the pure water temperature threshold of the next test step, it includes:

[0026] If the pure water temperature data of the current test step is less than the pure water temperature threshold of the next test step, the judgment unit determines to increase the temperature of the pure water inside the humidification tank;

[0027] If the pure water temperature data of the current test step is equal to the pure water temperature threshold of the next test step, the judgment unit determines that the pure water inside the humidification tank maintains the current temperature;

[0028] If the pure water temperature data of the current test step is greater than the pure water temperature threshold of the next test step, the judgment unit determines to cool the pure water inside the humidification tank.

[0029] Further, when it is determined to increase the temperature of the pure water inside the humidification tank, it includes:

[0030] Before entering the next test step, the pure water inside the heating water tank is heated, and at this time, the processing unit opens the third solenoid valve, the fourth solenoid valve and the seventh solenoid valve, and closes the first solenoid valve, the second solenoid valve, the fifth solenoid valve and the sixth solenoid valve, and then turns on the circulating water pump and the mesh electric heater;

[0031] When entering the next test step, the pure water inside the humidification tank is heated, and at this time the processing unit closes the seventh solenoid valve and opens the fifth solenoid valve and the sixth solenoid valve.

[0032] Further, when determining to cool the pure water inside the humidification tank, it includes:

[0033] Before entering the next test step, the pure water inside the refrigeration water tank is cooled, and at this time, the processing unit opens the first solenoid valve, the second solenoid valve and the seventh solenoid valve, and closes the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve and the sixth solenoid valve, and then starts the circulating water pump and the coil heat exchanger;

[0034] When entering the next test step, the pure water inside the humidification tank is cooled down, and at this time, the processing unit closes the seventh solenoid valve and opens the fifth solenoid valve and the sixth solenoid valve.

[0035] Further, after starting the circulating water pump and the mesh electric heater, the method includes:

[0036] The processing unit collects temperature data of the fourth temperature sensor and the fifth temperature sensor, and records the temperature data of the fourth temperature sensor as a first temperature value, records the temperature data of the fifth temperature sensor as a second temperature value, subtracts the second temperature value from the first temperature value to obtain a first temperature difference value, compares the first temperature difference value with a preset first temperature difference threshold value, and adjusts the speed of the circulating water pump according to the comparison result;

[0037] When the first temperature difference is greater than or equal to the first temperature difference threshold, the processing unit lowers the speed of the circulating water pump;

[0038] When the first temperature difference is less than the first temperature difference threshold, the processing unit increases the rotation speed of the circulating water pump.

[0039] Further, the first temperature difference is compared with a preset first temperature difference threshold, and the speed of the circulating water pump is adjusted according to the comparison result, including:

[0040] The processing unit collects pure water temperature data inside the humidification tank, records the pure water temperature data inside the humidification tank as a third temperature value, and adjusts the input power of the mesh electric heater according to the third temperature value;

[0041] Wherein, when the input power of the mesh electric heater is adjusted, the third temperature value is inversely proportional to the input power of the mesh electric heater.

[0042] Further, after starting the circulating water pump and the coil heat exchanger, the process includes:

[0043] The processing unit collects the third temperature value, the temperature data of the second temperature sensor and the third temperature sensor, and records the temperature data of the second temperature sensor as a fourth temperature value, and records the temperature data of the third temperature sensor as a fifth temperature value, and then subtracts the fourth temperature value from the fifth temperature value to obtain a second temperature difference value, subtracts the third temperature value from the fourth temperature value to obtain a third temperature difference value, and calculates a comprehensive temperature difference value according to the second temperature difference value and the third temperature difference value;

[0044] Comparing the comprehensive temperature difference with a preset comprehensive temperature difference threshold, and adjusting the speed of the circulating water pump according to the comparison result;

[0045] When the comprehensive temperature difference is greater than or equal to the comprehensive temperature difference threshold, the processing unit lowers the speed of the circulating water pump;

[0046] When the comprehensive temperature difference is less than the comprehensive temperature difference threshold, the processing unit increases the rotation speed of the circulating water pump.

[0047] Further, when calculating the comprehensive temperature difference according to the second temperature difference and the third temperature difference, it includes:

[0048] The comprehensive temperature difference is obtained by the following formula:

[0049] Z=α*E+β*T

[0050] Among them, α represents the weight coefficient of the second temperature difference, β represents the weight coefficient of the third temperature difference, and α+β=1; E represents the second temperature difference; T represents the third temperature difference.

[0051] Compared with the prior art, the invention has the following beneficial effects: the rapid temperature control device for the humidifying tank of the fuel cell test bench provided by the invention can quickly and accurately control the temperature of the pure water inside the humidifying tank according to the operation requirements of the fuel cell test bench. By collecting and analyzing the temperature data in real time, the control module can timely adjust the speed of the circulating water pump and the input power of the mesh electric heater, thereby realizing accurate control of the pure water temperature.

[0052] The rapid temperature control device for the humidifying tank of a fuel cell test bench provided by the present invention is designed with a multi-branch electromagnetic valve group. The rapid temperature control device for the humidifying tank of a fuel cell test bench of this embodiment can flexibly respond to various testing requirements and achieve rapid and accurate temperature control.

[0053] The fuel cell test bench humidification tank rapid temperature control device provided by the present invention can ensure that the temperature and liquid level of the pure water inside the humidification tank are always in the best state through comprehensive temperature and liquid level monitoring, thereby providing a stable and reliable humidification environment for fuel cell testing. The control module determines the temperature control mode through the judgment unit according to the collected temperature and liquid level data, and controls the solenoid valve group and the circulating water pump in real time through the processing unit, so as to realize the precise control of the pure water temperature inside the humidification tank and ensure the smooth progress of the fuel cell test. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0055] Figure 1 A schematic diagram of the structure of a rapid temperature control device for a humidifying tank of a fuel cell test bench provided by an embodiment of the present invention;

[0056] Figure 2 A schematic structural diagram of a mesh electric heater of a rapid temperature control device for a humidifying tank of a fuel cell test bench provided by an embodiment of the present invention;

[0057] Figure 3 A schematic structural diagram of a control module of a rapid temperature control device for a humidifying tank of a fuel cell test bench provided in an embodiment of the present invention.

[0058] In the figure: 100, humidification tank; 110, heating water tank; 111, mesh electric heater; 120, refrigeration water tank; 121, coil heat exchanger; 122, chiller; 130, circulating water pump; 141, first solenoid valve; 142, second solenoid valve; 143, third solenoid valve; 144, fourth solenoid valve; 145, fifth solenoid valve; 146, sixth solenoid valve; 147, seventh solenoid valve; 151, liquid level sensor; 152, first temperature sensor; 153, second temperature sensor; 154, third temperature sensor; 155, fourth temperature sensor; 156, fifth temperature sensor; 160, intake pipe; 170, control module; 171, test sequence generation unit; 172, acquisition unit; 173, judgment unit; 174, processing unit. DETAILED DESCRIPTION

[0059] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0060] See also Figure 1-3 As shown, in some embodiments of the present application, this embodiment provides a rapid temperature control device for a humidifying tank 100 of a fuel cell test bench, comprising:

[0061] A humidifying tank 100, a heating water tank 110, a cooling water tank 120, a pipeline, a circulating water pump 130, a solenoid valve group, a sensor group, an air inlet pipe 160 and a control module 170, wherein the control module 170 is electrically connected to the humidifying tank 100, the heating water tank 110, the cooling water tank 120, the pipeline, the circulating water pump 130, the solenoid valve group and the sensor group; wherein a plurality of mesh electric heaters 111 are arranged in the heating water tank 110, a coil heat exchanger 121 is arranged in the cooling water tank 120, and a chiller 122 is arranged at the water inlet end of the coil heat exchanger 121; the control module 170 includes a test sequence generating unit 171, a collecting unit 172, a judging unit 173 and a processing unit 174;

[0062] The test sequence generation unit 171 is configured to set a test sequence before the fuel cell test bench is run, and determine the pure water temperature threshold inside the humidification tank 100 under different test steps according to the test sequence;

[0063] The collection unit 172 is configured to collect pure water temperature data inside the humidification tank 100 in real time;

[0064] The judgment unit 173 is configured to determine the temperature control mode of the pure water inside the humidification tank 100 according to the pure water temperature data of the current test step and the pure water temperature threshold of the next test step; wherein the temperature control mode includes heating and cooling the pure water inside the humidification tank 100;

[0065] The processing unit 174 is configured to control the solenoid valve group, start the circulating water pump 130, and collect the temperature data of the sensor group when the temperature control mode is determined, and adjust the speed of the circulating water pump 130 according to the temperature data of the sensor group; it is also configured to adjust the mesh electric heater 111 according to the temperature data of the sensor group when it is determined that the pure water inside the humidification tank 100 is heated.

[0066] It can be seen that the rapid temperature control device of the humidifying tank 100 of the fuel cell test bench provided in this embodiment includes a humidifying tank 100, a heating water tank 110, a cooling water tank 120, a pipeline, a circulating water pump 130, a solenoid valve group, a sensor group and a control module 170; wherein the humidifying tank 100 is used to store pure water and humidify the air or hydrogen entering the humidifying tank 100; the heating water tank 110 is used to provide the heat required for heating the pure water; the cooling water tank 120 is used to provide a cooling effect when cooling is required; the pipeline connects the various components to ensure that the pure water can flow in the system; the circulating water pump 130 is responsible for promoting the circulation of pure water in the system, and the solenoid valve group is used to control the direction and flow of water flow in the pipeline; the sensor group includes a plurality of temperature sensors for real-time monitoring of temperature data and liquid level data at different positions in the system; the control module 170 is used to determine the temperature control mode through the judgment unit 173 according to the test sequence set by the test sequence generation unit 171 and the temperature data collected by the acquisition unit 172, and to control the system in real time through the processing unit 174.

[0067] It is understandable that the rapid temperature control device of the fuel cell test bench humidification tank 100 of this embodiment can quickly and accurately control the temperature of the pure water inside the humidification tank 100 according to the operation requirements of the fuel cell test bench. By collecting and analyzing the temperature data in real time, the control module 170 can timely adjust the speed of the circulating water pump 130 and the input power of the mesh electric heater 111, thereby realizing accurate control of the pure water temperature.

[0068] Specifically, the solenoid valve group includes:

[0069] A first branch is provided between the water outlet of the circulating water pump 130 and the water inlet of the refrigeration water tank 120, and a first solenoid valve 141 is provided on the first branch;

[0070] A second branch is provided between the water outlet of the refrigeration water tank 120 and the pure water inlet of the humidification tank 100, and a second solenoid valve 142 is provided on the second branch;

[0071] A third branch is provided between the water outlet of the circulating water pump 130 and the water inlet of the heating water tank 110, and a third solenoid valve 143 is provided on the third branch;

[0072] A fourth branch is provided between the water outlet of the heating water tank 110 and the pure water inlet of the humidifying tank 100, and a fourth solenoid valve 144 is provided on the fourth branch;

[0073] The output end of the second branch and the output end of the fourth branch are both connected to the pure water inlet of the humidification tank 100 through the fifth branch, and the fifth solenoid valve 145 is provided on the fifth branch;

[0074] A sixth branch is provided between the pure water outlet of the humidifying tank 100 and the water inlet of the circulating water pump 130, and a sixth solenoid valve 146 is provided on the sixth branch;

[0075] The fifth branch is connected to the sixth branch through the seventh branch, and a seventh solenoid valve 147 is provided on the seventh branch.

[0076] It can be seen that the first solenoid valve 141 is used to control the flow direction of cooling water. When the pure water inside the humidifier tank 100 needs to be cooled, the first solenoid valve 141 is opened to connect the water outlet of the circulating water pump 130 with the water inlet of the refrigerating water tank 120, thereby introducing cooling water into the system; the second solenoid valve 142 is used to control the connection between the water outlet of the refrigerating water tank 120 and the pure water inlet of the humidifier tank 100, ensuring that the cooling water can smoothly enter the humidifier tank 100 for cooling treatment; the third solenoid valve 143 is used to control the flow direction of heating water. When the pure water inside the humidifier tank 100 needs to be heated, the third solenoid valve 143 is opened to connect the water outlet of the circulating water pump 130 with the water inlet of the heating water tank 110, thereby introducing the heated water into the system; the fourth solenoid valve 14 4 is used to control the connection between the water outlet of the heating water tank 110 and the pure water inlet of the humidifying tank 100, ensuring that the heated water can smoothly enter the humidifying tank 100 for temperature treatment; the fifth solenoid valve 145 is used to ensure that when the pure water in the humidifying tank 100 needs to be heated and cooled at the same time, the cooling water and the heating water can be reasonably distributed according to the instructions of the control module 170, so as to achieve precise temperature control; the sixth solenoid valve 146 is used to control the circulation of the pure water in the humidifying tank 100, ensuring that the pure water flows in the system for uniform temperature distribution; the seventh solenoid valve 147 is used to connect the fifth branch with the sixth branch when the pure water in the humidifying tank 100 needs to circulate, ensuring that the cooling water and the heating water are fully mixed in the humidifying tank 100, so as to reach the required temperature. Through the design of this multi-branch solenoid valve group, the rapid temperature control device of the humidifying tank 100 of the fuel cell test bench of this embodiment can flexibly respond to different test requirements and achieve rapid and precise temperature control.

[0077] Specifically, the sensor group includes:

[0078] The liquid level sensor 151 and the first temperature sensor 152 are both located inside the humidification tank 100. The first temperature sensor 152 is used to collect pure water temperature data;

[0079] The second temperature sensor 153 and the third temperature sensor 154 are respectively located at the water inlet end of the refrigeration water tank 120 and inside the refrigeration water tank 120;

[0080] The fourth temperature sensor 155 and the fifth temperature sensor 156 are respectively located at the water inlet end of the heating water tank 110 and inside the heating water tank 110 .

[0081] It can be seen that the liquid level sensor 151 is used to monitor the liquid level height of the pure water inside the humidification tank 100 to ensure that the pure water is always at an appropriate level during the test to avoid poor humidification effect due to too low a liquid level or overflow due to too high a liquid level; the first temperature sensor 152 is used to monitor the temperature of the pure water inside the humidification tank 100 in real time to provide key data for temperature control; the second temperature sensor 153 and the third temperature sensor 154 are respectively located at the water inlet end and the inside of the refrigeration water tank 120, and are used to monitor the water inlet temperature and the internal temperature of the refrigeration water tank 120 to ensure that the refrigeration water tank 120 can provide a stable and appropriate cooling effect; the fourth temperature sensor 155 and the fifth temperature sensor 156 are respectively located at the water inlet end and the inside of the heating water tank 110, and are used to monitor the water inlet temperature and the internal temperature of the heating water tank 110 to ensure that the heating water tank 110 can provide a stable and appropriate heating effect.

[0082] It is understandable that, through this comprehensive temperature and liquid level monitoring, the rapid temperature control device of the humidifying tank 100 of the fuel cell test bench can ensure that the temperature and liquid level of the pure water inside the humidifying tank 100 are always in the best state, thereby providing a stable and reliable humidification environment for the fuel cell test. The control module 170 determines the temperature control mode through the judgment unit 173 according to the collected temperature and liquid level data, and controls the solenoid valve group and the circulating water pump 130 in real time through the processing unit 174, so as to achieve precise control of the pure water temperature inside the humidifying tank 100 and ensure the smooth progress of the fuel cell test.

[0083] Specifically, when determining the temperature control mode of the pure water inside the humidification tank 100 according to the pure water temperature data of the current test step and the pure water temperature threshold of the next test step, it includes:

[0084] If the pure water temperature data of the current test step is less than the pure water temperature threshold of the next test step, the judgment unit 173 determines to increase the temperature of the pure water inside the humidification tank 100;

[0085] If the pure water temperature data of the current test step is equal to the pure water temperature threshold of the next test step, the judgment unit 173 determines that the pure water inside the humidification tank 100 maintains the current temperature;

[0086] If the pure water temperature data of the current test step is greater than the pure water temperature threshold of the next test step, the judgment unit 173 determines to cool the pure water inside the humidification tank 100 .

[0087] It can be seen that the control module 170 performs corresponding real-time control on the solenoid valve group and the circulating water pump 130 through the processing unit 174 according to the decision result of the judgment unit 173. When the temperature needs to be raised, the third solenoid valve 143 and the fourth solenoid valve 144 are opened, and the circulating water pump 130 introduces the hot water in the heating water tank 110 into the humidification tank 100, and the mesh electric heater 111 provides additional heat to quickly increase the pure water temperature; if the temperature needs to be lowered, the first solenoid valve 141 and the second solenoid valve 142 are opened, and the circulating water pump 130 introduces the cold water in the refrigeration water tank 120 into the humidification tank 100 to quickly lower the pure water temperature; if the current temperature needs to be maintained, all solenoid valves are closed, and the circulating water pump 130 keeps running at a low speed to maintain the temperature of the pure water stable.

[0088] Specifically, when it is determined to increase the temperature of the pure water in the humidification tank 100, it includes:

[0089] Before entering the next test step, the pure water in the heating water tank 110 is heated. At this time, the processing unit 174 opens the third solenoid valve 143, the fourth solenoid valve 144 and the seventh solenoid valve 147, and closes the first solenoid valve 141, the second solenoid valve 142, the fifth solenoid valve 145 and the sixth solenoid valve 146, and then turns on the circulating water pump 130 and the mesh electric heater 111;

[0090] When entering the next test step, the pure water inside the humidification tank 100 is heated. At this time, the processing unit 174 closes the seventh solenoid valve 147 and opens the fifth solenoid valve 145 and the sixth solenoid valve 146 .

[0091] It can be seen that, before entering the next test step, by preheating the pure water inside the heating water tank 110, the time for the pure water inside the humidifier tank 100 to reach the required temperature can be shortened. At this time, the third solenoid valve 143 and the fourth solenoid valve 144 are opened to ensure that the heated water can smoothly enter the humidifier tank 100 for heating treatment. At the same time, the opening of the seventh solenoid valve 147 connects the fifth branch with the sixth branch to ensure that the heated water is fully mixed inside the humidifier tank 100 to reach the required temperature. The opening of the mesh electric heater 111 further accelerates the heating process of the pure water. When entering the next test step, in order to ensure that the temperature of the pure water inside the humidifier tank 100 is evenly distributed, the processing unit 174 closes the seventh solenoid valve 147 and opens the fifth solenoid valve 145 and the sixth solenoid valve 146. In this way, the hot water in the heating water tank 110 directly enters the interior of the humidification tank 100 through the fifth branch, and the opening of the sixth solenoid valve 146 ensures the circulation of pure water inside the humidification tank 100, thereby achieving precise temperature control.

[0092] Specifically, when determining to cool down the pure water inside the humidification tank 100, it includes:

[0093] Before entering the next test step, the pure water inside the refrigeration water tank 120 is cooled. At this time, the processing unit 174 opens the first solenoid valve 141, the second solenoid valve 142 and the seventh solenoid valve 147, and closes the third solenoid valve 143, the fourth solenoid valve 144, the fifth solenoid valve 145 and the sixth solenoid valve 146, and then starts the circulating water pump 130 and the coil heat exchanger 121;

[0094] When entering the next test step, the pure water inside the humidification tank 100 is cooled down. At this time, the processing unit 174 closes the seventh solenoid valve 147 and opens the fifth solenoid valve 145 and the sixth solenoid valve 146 .

[0095] It can be seen that, before entering the next test step, by cooling the pure water inside the refrigerating water tank 120 in advance, the time for the pure water inside the humidifying tank 100 to reach the required temperature can be shortened. At this time, the first solenoid valve 141 and the second solenoid valve 142 are opened to ensure that the cooled water can smoothly enter the humidifying tank 100 for cooling treatment. At the same time, the opening of the seventh solenoid valve 147 connects the fifth branch with the sixth branch to ensure that the cooled water is fully mixed inside the humidifying tank 100 to reach the required temperature. The opening of the coil heat exchanger 121 further accelerates the cooling process of the pure water. When entering the next test step, in order to ensure that the temperature of the pure water inside the humidifying tank 100 is evenly distributed, the processing unit 174 closes the seventh solenoid valve 147 and opens the fifth solenoid valve 145 and the sixth solenoid valve 146. In this way, the cold water in the refrigeration water tank 120 directly enters the interior of the humidification tank 100 through the fifth branch, and the opening of the sixth solenoid valve 146 ensures the circulation of pure water inside the humidification tank 100, thereby achieving precise temperature control.

[0096] Specifically, after the circulating water pump 130 and the mesh electric heater 111 are turned on, the following steps are performed:

[0097] The processing unit 174 collects temperature data of the fourth temperature sensor 155 and the fifth temperature sensor 156, and records the temperature data of the fourth temperature sensor 155 as a first temperature value, and records the temperature data of the fifth temperature sensor 156 as a second temperature value, subtracts the second temperature value from the first temperature value to obtain a first temperature difference value, compares the first temperature difference value with a preset first temperature difference threshold value, and adjusts the speed of the circulating water pump 130 according to the comparison result;

[0098] When the first temperature difference is greater than or equal to the first temperature difference threshold, the processing unit 174 reduces the speed of the circulating water pump 130;

[0099] When the first temperature difference is less than the first temperature difference threshold, the processing unit 174 increases the rotation speed of the circulating water pump 130 .

[0100] It can be seen that by real-time monitoring of the temperature difference inside the humidification tank 100, the processing unit 174 can accurately control the rotation speed of the circulating water pump 130 to ensure the uniformity and stability of the pure water temperature. When the first temperature difference is greater than or equal to the first temperature difference threshold, it indicates that the temperature distribution inside the humidification tank 100 is uneven, and the rotation speed of the circulating water pump 130 needs to be reduced to reduce the impact of the water flow on the temperature distribution, thereby avoiding local overheating or overcooling. On the contrary, when the first temperature difference is less than the first temperature difference threshold, it indicates that the temperature distribution inside the humidification tank 100 is relatively uniform. At this time, the rotation speed of the circulating water pump 130 can be appropriately increased to speed up the circulation of pure water and further improve the accuracy of temperature control.

[0101] Specifically, the first temperature difference is compared with a preset first temperature difference threshold, and the speed of the circulating water pump 130 is adjusted according to the comparison result, including:

[0102] The processing unit 174 collects pure water temperature data inside the humidification tank 100, and records the pure water temperature data inside the humidification tank 100 as a third temperature value, and adjusts the input power of the mesh electric heater 111 according to the third temperature value;

[0103] When the input power of the mesh electric heater 111 is adjusted, the third temperature value is inversely proportional to the input power of the mesh electric heater 111 .

[0104] It can be seen that by real-time monitoring of the pure water temperature inside the humidification tank 100, the processing unit 174 can accurately control the input power of the mesh electric heater 111 to ensure accurate control of the pure water temperature. When the third temperature value is lower than the set target temperature, the processing unit 174 will increase the input power of the mesh electric heater 111, thereby increasing the temperature of the pure water. On the contrary, when the third temperature value is higher than the target temperature, the processing unit 174 will reduce the input power of the mesh electric heater 111 to lower the temperature of the pure water. This inverse relationship ensures the flexibility and accuracy of temperature control, thereby meeting the strict requirements of different test steps for the pure water temperature.

[0105] Specifically, after starting the circulating water pump 130 and the coil heat exchanger 121, the following steps are performed:

[0106] The processing unit 174 collects the third temperature value, the temperature data of the second temperature sensor 153 and the third temperature sensor 154, and records the temperature data of the second temperature sensor 153 as the fourth temperature value, and the temperature data of the third temperature sensor 154 as the fifth temperature value, and then subtracts the fourth temperature value from the fifth temperature value to obtain a second temperature difference value, subtracts the third temperature value from the fourth temperature value to obtain a third temperature difference value, and calculates a comprehensive temperature difference value according to the second temperature difference value and the third temperature difference value;

[0107] Comparing the comprehensive temperature difference with a preset comprehensive temperature difference threshold, and adjusting the speed of the circulating water pump 130 according to the comparison result;

[0108] When the integrated temperature difference is greater than or equal to the integrated temperature difference threshold, the processing unit 174 reduces the speed of the circulating water pump 130;

[0109] When the comprehensive temperature difference is less than the comprehensive temperature difference threshold, the processing unit 174 increases the rotation speed of the circulating water pump 130 .

[0110] Specifically, when calculating the comprehensive temperature difference according to the second temperature difference and the third temperature difference, it includes:

[0111] The comprehensive temperature difference is obtained by the following formula:

[0112] Z=α*E+β*T

[0113] Wherein, α represents the weight coefficient of the second temperature difference, β represents the weight coefficient of the third temperature difference, and α+β=1; E represents the second temperature difference; and T represents the third temperature difference.

[0114] It can be seen that by comprehensively considering the temperature differences at different positions inside the humidification tank 100, the processing unit 174 can more comprehensively evaluate the uniformity of the pure water temperature. By assigning different weight coefficients α and β to the second temperature difference and the third temperature difference, the rotation speed of the circulating water pump 130 can be flexibly adjusted to cope with the uneven temperature distribution problem that may occur in different test steps. When the comprehensive temperature difference Z is greater than or equal to the comprehensive temperature difference threshold, it indicates that there is a large difference in the temperature distribution inside the humidification tank 100, and it is necessary to reduce the rotation speed of the circulating water pump 130 to reduce the influence of the water flow on the temperature distribution, thereby avoiding local overheating or overcooling. On the contrary, when the comprehensive temperature difference Z is less than the comprehensive temperature difference threshold, it indicates that the temperature distribution inside the humidification tank 100 is relatively uniform. At this time, the rotation speed of the circulating water pump 130 can be appropriately increased to speed up the circulation of pure water and further improve the accuracy of temperature control. In addition, by real-time monitoring of the temperature data inside the humidification tank 100, the processing unit 174 can also adjust the cooling capacity of the coil heat exchanger 121 as needed. When the temperature data indicates that the pure water temperature is too high, the processing unit 174 can increase the cooling water flow of the coil heat exchanger 121 to improve the cooling efficiency. Conversely, when the pure water temperature is close to the target temperature, the processing unit 174 can reduce the cooling water flow to avoid energy waste caused by overcooling.

[0115] It is understandable that by precisely controlling the speed of the circulating water pump 130, the input power of the mesh electric heater 111, and the cooling capacity of the coil heat exchanger 121, the processing unit 174 can ensure the uniformity and stability of the pure water temperature inside the humidification tank 100, and meet the strict requirements of various test steps on the pure water temperature. This comprehensive control strategy not only improves the accuracy of temperature control, but also optimizes the energy efficiency of the system, ensuring the efficient operation of the test equipment.

[0116] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0117] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0118] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0119] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A rapid temperature control device for a humidifying tank of a fuel cell test bench, characterized in that: include: A humidifying tank, a heating water tank, a cooling water tank, a pipeline, a circulating water pump, a solenoid valve group, a sensor group, an air inlet pipe and a control module, wherein the control module is electrically connected to the humidifying tank, the heating water tank, the cooling water tank, the pipeline, the circulating water pump, the solenoid valve group and the sensor group; wherein the heating water tank is provided with a plurality of mesh electric heaters, the cooling water tank is provided with a coil heat exchanger, and the water inlet end of the coil heat exchanger is provided with a chiller; the control module includes a test sequence generating unit, a collecting unit, a judging unit and a processing unit; The test sequence generation unit is configured to set a test sequence before the fuel cell test bench is run, and determine the pure water temperature threshold value inside the humidification tank under different test steps according to the test sequence; The acquisition unit is configured to acquire pure water temperature data inside the humidification tank in real time; The judgment unit is configured to determine the temperature control mode of the pure water inside the humidification tank according to the pure water temperature data of the current test step and the pure water temperature threshold of the next test step; wherein the temperature control mode includes heating and cooling the pure water inside the humidification tank; The processing unit is configured to, when determining the temperature control mode, control the solenoid valve group, start the circulating water pump, collect temperature data of the sensor group, and adjust the speed of the circulating water pump according to the temperature data of the sensor group; and is also configured to, when determining to increase the temperature of the pure water inside the humidification tank, adjust the mesh electric heater according to the temperature data of the sensor group; The solenoid valve group comprises: A first branch is provided between the water outlet of the circulating water pump and the water inlet of the refrigeration water tank, and a first solenoid valve is provided on the first branch; A second branch is provided between the water outlet of the refrigeration water tank and the pure water inlet of the humidification tank, and a second solenoid valve is provided on the second branch; A third branch is provided between the water outlet of the circulating water pump and the water inlet of the heating water tank, and a third solenoid valve is provided on the third branch; A fourth branch is provided between the water outlet of the heating water tank and the pure water inlet of the humidifying tank, and a fourth solenoid valve is provided on the fourth branch; The output end of the second branch and the output end of the fourth branch are both connected to the pure water inlet of the humidification tank through a fifth branch, and a fifth solenoid valve is provided on the fifth branch; A sixth branch is provided between the pure water outlet of the humidifying tank and the water inlet of the circulating water pump, and a sixth solenoid valve is provided on the sixth branch; The fifth branch is connected to the sixth branch through a seventh branch, and a seventh solenoid valve is provided on the seventh branch; The sensor group includes: A liquid level sensor and a first temperature sensor are both located inside the humidification tank, and the first temperature sensor is used to collect the pure water temperature data; A second temperature sensor and a third temperature sensor are respectively located at the water inlet end of the refrigeration water tank and inside the refrigeration water tank; a fourth temperature sensor and a fifth temperature sensor, respectively located at the water inlet end of the heating water tank and inside the heating water tank; When the temperature control mode of the pure water inside the humidification tank is determined according to the pure water temperature data of the current test step and the pure water temperature threshold of the next test step, it includes: If the pure water temperature data of the current test step is less than the pure water temperature threshold of the next test step, the judgment unit determines to increase the temperature of the pure water inside the humidification tank; If the pure water temperature data of the current test step is equal to the pure water temperature threshold of the next test step, the judgment unit determines that the pure water inside the humidification tank maintains the current temperature; If the pure water temperature data of the current test step is greater than the pure water temperature threshold of the next test step, the judgment unit determines to cool down the pure water inside the humidification tank; When determining to increase the temperature of the pure water in the humidification tank, the method includes: Before entering the next test step, the pure water inside the heating water tank is heated, and at this time, the processing unit opens the third solenoid valve, the fourth solenoid valve and the seventh solenoid valve, and closes the first solenoid valve, the second solenoid valve, the fifth solenoid valve and the sixth solenoid valve, and then turns on the circulating water pump and the mesh electric heater; When entering the next test step, the pure water inside the humidification tank is heated, and at this time, the processing unit closes the seventh solenoid valve and opens the fifth solenoid valve and the sixth solenoid valve; When determining to cool down the pure water inside the humidification tank, it includes: Before entering the next test step, the pure water inside the refrigeration water tank is cooled, and at this time, the processing unit opens the first solenoid valve, the second solenoid valve and the seventh solenoid valve, and closes the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve and the sixth solenoid valve, and then starts the circulating water pump and the coil heat exchanger; When entering the next test step, the pure water inside the humidification tank is cooled down, and at this time, the processing unit closes the seventh solenoid valve and opens the fifth solenoid valve and the sixth solenoid valve; The processing unit collects pure water temperature data inside the humidification tank, and records the pure water temperature data inside the humidification tank as a third temperature value; After starting the circulating water pump and the coil heat exchanger, the process includes: The processing unit collects the third temperature value, the temperature data of the second temperature sensor and the third temperature sensor, and records the temperature data of the second temperature sensor as a fourth temperature value, and records the temperature data of the third temperature sensor as a fifth temperature value, and then subtracts the fourth temperature value from the fifth temperature value to obtain a second temperature difference value, subtracts the third temperature value from the fourth temperature value to obtain a third temperature difference value, and calculates a comprehensive temperature difference value according to the second temperature difference value and the third temperature difference value; Comparing the comprehensive temperature difference with a preset comprehensive temperature difference threshold, and adjusting the speed of the circulating water pump according to the comparison result; When the comprehensive temperature difference is greater than or equal to the comprehensive temperature difference threshold, the processing unit lowers the speed of the circulating water pump; When the comprehensive temperature difference is less than the comprehensive temperature difference threshold, the processing unit increases the speed of the circulating water pump; When calculating the comprehensive temperature difference according to the second temperature difference and the third temperature difference, the method includes: The comprehensive temperature difference is obtained by the following formula: Z=α*E+β*T Among them, α represents the weight coefficient of the second temperature difference, β represents the weight coefficient of the third temperature difference, and α+β=1; E represents the second temperature difference; T represents the third temperature difference.

2. The rapid temperature control device for the humidifying tank of a fuel cell test bench according to claim 1, characterized in that: After the circulating water pump and the mesh electric heater are turned on, the method includes: The processing unit collects temperature data of the fourth temperature sensor and the fifth temperature sensor, and records the temperature data of the fourth temperature sensor as a first temperature value, records the temperature data of the fifth temperature sensor as a second temperature value, subtracts the second temperature value from the first temperature value to obtain a first temperature difference value, compares the first temperature difference value with a preset first temperature difference threshold value, and adjusts the speed of the circulating water pump according to the comparison result; When the first temperature difference is greater than or equal to the first temperature difference threshold, the processing unit lowers the speed of the circulating water pump; When the first temperature difference is less than the first temperature difference threshold, the processing unit increases the rotation speed of the circulating water pump.

3. The rapid temperature control device for the humidifying tank of a fuel cell test bench according to claim 2, characterized in that: The first temperature difference is compared with a preset first temperature difference threshold, and the speed of the circulating water pump is adjusted according to the comparison result, including: adjusting the input power of the mesh electric heater according to the third temperature value; Wherein, when the input power of the mesh electric heater is adjusted, the third temperature value is inversely proportional to the input power of the mesh electric heater.

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