A heating performance testing device and testing method for a water heating PTC heating system

Abstract

The present application belongs to the field of automobile technology, and in particular to a heating performance testing device and testing method for a water heating PTC heating system. The device comprises a water circulation system, an in-cabin air conditioning system, a cooling system, a power supply system, a control system, and a sensor acquisition and calculation system. The power supply system is connected to the water heating PTC sample, the cooling system is connected to the radiator in the water circulation system, the sensor acquisition and calculation system is connected to the water circulation system, the in-cabin air conditioning system, and the cooling system, and the control system is connected to the water heating PTC sample and the water pump in the water circulation system when testing the heating performance of the water heating PTC monomer or the water heating PTC heating system. The present application is simple to implement, practical, highly precise, and versatile, and can test the performance of a monomer, test the performance of a water heating PTC system under different working conditions, and shorten the development cycle by about 3 months.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of automobile technology, in particular to a heating performance testing device and testing method of a water heating PTC heating system. BACKGROUND

[0002] A water heating PTC heating system is commonly used in a new energy cockpit heating system. The original air conditioning system test bench cannot meet the heating performance testing requirements of the water heating PTC single unit and system because it does not have a dedicated water chiller. Adding a water chiller requires an investment of 3 million yuan in laboratory and system upgrade costs. SUMMARY

[0003] To solve the above problems, the present application provides a heating performance testing device and testing method of a water heating PTC heating system, which is simple to implement, practical, high in precision, and versatile in use, i.e., it can test the performance of a single unit and complete water heating PTC system performance testing under different working conditions, which can shorten the development cycle by about 3 months.

[0004] The technical solution of the present application is described below in combination with the accompanying drawings:

[0005] In a first aspect, the present application provides a heating performance testing device of a water heating PTC heating system, characterized in that it comprises:

[0006] a water circulation system for providing a water circulation loop;

[0007] a cockpit air conditioning system 5 for providing a stable temperature environment cabin 2 and radiator inlet air according to the test standard requirements, serving as an automatic constant temperature system;

[0008] a cooling system for sending the uniform temperature air in the environment cabin 2 to the radiator at a stable and uniform speed to cool the water circulation system;

[0009] a power supply system for supplying power to the test sample;

[0010] a control system for adjusting the power of the test sample and the flow of the water pump 16;

[0011] a sensor acquisition and calculation system 7 for controlling the temperature and inlet air speed in the environment cabin 2, acquiring water flow, water heating PTC sample 1 inlet and outlet temperature and pressure, and finally calculating water heating PTC heating capacity, PTC flow resistance and PTC heating efficiency;

[0012] The power supply system is connected with the water heating PTC sample 1; the cooling system is connected with the radiator 6 in the water circulation system; the sensor collection and calculation system 7 is connected with the water circulation system, the cabin air conditioning system 2 and the cooling system; the control system is connected with the water heating PTC sample 1 and the water pump 16 in the water circulation system when the heating performance test of the water heating PTC monomer is carried out and when the heating performance test of the water heating PTC heating system is carried out.

[0013] Further, the water circulation system further comprises the water heating PTC sample 1, the water heating and flow adjusting device 3, the first temperature sensor 13, the second temperature sensor 14, the first pressure sensor 12, the second pressure sensor 15 and the flow sensor 11; the water heating and flow adjusting device 3, the flow sensor 11, the first pressure sensor 12, the first temperature sensor 13, the water heating PTC sample 1, the second temperature sensor 14, the second pressure sensor 15, the radiator 6 and the water heating and flow adjusting device 3 are sequentially connected when the heating performance test of the water heating PTC monomer is carried out; the water pump 16, the water heating PTC sample 1, the second pressure sensor 15, the second temperature sensor 14, the radiator 6, the first temperature sensor 13, the first pressure sensor 12 and the water pump 16 are sequentially connected when the heating performance test of the water heating PTC heating system is carried out.

[0014] Further, the cooling system is composed of the enthalpy difference table 4.

[0015] Further, the power supply system comprises the high-voltage power supply 10, the low-voltage power supply 8, the wire, the high-voltage power supply switch and the low-voltage power supply switch.

[0016] Further, the control system comprises the control computer 9 and the CAN-OE.

[0017] In the second aspect, the application further provides a heating performance test method of a water heating PTC heating system, which is realized by a heating performance test device of a water heating PTC heating system and comprises the heating performance test of the water heating PTC monomer and the heating performance test of the water heating PTC heating system.

[0018] Further, the specific method for the heating performance test of the water heating PTC monomer is as follows:

[0019] Step 11), sequentially connecting the water heating and flow adjusting device 3, the flow sensor 11, the first pressure sensor 12, the first temperature sensor 13, the water heating PTC sample 1, the second temperature sensor 14, the second pressure sensor 15, the radiator 6 and the water heating and flow adjusting device 3 to form a water circulation loop;

[0020] Step 12), setting the temperature of the environment cabin 2 until the temperature in the environment cabin 2 is stable;

[0021] Step 13) Set the water flow rate, inlet water temperature, PTC power setting, enthalpy difference wind speed according to standard requirements;

[0022] Step 14) After the parameters set in Step 13) reach a stable value, the sensor acquisition and calculation system 7 reads the inlet flow rate, inlet and outlet temperature and pressure of the water heating PTC, and calculates the water-side heating amount and flow resistance of the water heating PTC based on the above test parameters.

[0023] Step 15) After the system stabilizes, use the control computer 9 to read the power of the PTC electric side of the water heating system;

[0024] Step 16) Divide the water-side heating amount of the PTC in step 14) by the electric-side power of the PTC in step 15) to calculate the heating efficiency of the PTC under specific operating conditions.

[0025] Furthermore, in step 12), the temperature of the environmental chamber 2 is set to 25°C.

[0026] Furthermore, in step 13), the enthalpy difference wind speed is 5 m / s.

[0027] Furthermore, the specific method for testing the heating performance of the water-based PTC heating system is as follows:

[0028] Step 21) Connect the water pump 16, water heating PTC sample 1, second pressure sensor 15, second temperature sensor 14, radiator 6, first temperature sensor 13, first pressure sensor 12 and water pump 16 in sequence to form a water circulation loop;

[0029] Step 22) Set the temperature of environmental chamber 2 according to the system test conditions until the temperature inside environmental chamber 2 stabilizes;

[0030] Step 23) Set the water pump flow rate, PTC setting, and enthalpy difference tester airflow according to the system test conditions;

[0031] Step 24) After the system stabilizes, the sensor acquisition and calculation system 7 reads the water circulation system flow rate, radiator inlet and outlet temperatures and pressure, and calculates the water-side heat exchange of the system.

[0032] Step 25) Calculate the heat exchange on the air side of radiator 6 using the enthalpy difference platform and sensor acquisition and calculation system, which is the heating amount of the water heating PTC system.

[0033] The beneficial effects of this invention are as follows:

[0034] 1) This invention can save approximately 3 million yuan in laboratory investment;

[0035] 2) This invention is simple to implement, practical, highly accurate, and versatile.

[0036] 3) This invention can test the performance of individual units and also complete the performance test of water heating PTC systems under different working conditions, which can shorten the development cycle by about 3 months. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 A schematic diagram of the structure for testing the heating performance of a single PTC water heating unit;

[0039] Figure 2 This is a schematic diagram of the structure for testing the heating performance of a PTC water heating system.

[0040] In the picture:

[0041] 1. PTC water heating sample; 2. Environmental chamber; 3. Water heating and flow regulation device; 4. Enthalpy difference platform; 5. In-chamber air conditioning system; 6. Radiator; 7. Sensor acquisition and calculation system; 8. Low-voltage power supply; 9. Control computer; 10. High-voltage power supply; 11. Flow sensor; 12. First pressure sensor; 13. First temperature sensor; 14. Second temperature sensor; 15. Second pressure sensor; 16. Water pump. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0044] Example 1

[0045] See Figure 1 and Figure 2 A heating performance testing device for a water-based PTC heating system, comprising:

[0046] A water circulation system is used to provide a water circulation loop;

[0047] The cabin air conditioning system 5 is used to provide a stable temperature for the environmental chamber 2 and radiator air intake according to the test standard requirements, and is an automatic constant temperature system.

[0048] The cooling system is used to deliver the uniformly heated air in the environmental chamber 2 to the radiator at a stable and uniform speed to cool the water circulation system.

[0049] The power supply system is used to power the test sample;

[0050] The control system is used to regulate the power of the test sample and the flow rate of the water pump 16;

[0051] The sensor acquisition and calculation system 7 is used to control the temperature and air velocity inside the environmental chamber 2, collect the water flow rate, inlet and outlet temperatures and pressures of the water heating PTC sample 1, and finally calculate the water heating PTC heating capacity, PTC flow resistance and PTC heating efficiency.

[0052] The water circulation system includes a PTC water heating sample 1, a water heating and flow regulation device 3, a radiator 6, a first temperature sensor 13, a second temperature sensor 14, a first pressure sensor 12, a second pressure sensor 15, a flow sensor 11, and a water pump 16.

[0053] The cooling system consists of an enthalpy difference platform 4.

[0054] The power supply system includes a high-voltage power supply 10, a low-voltage power supply 8, wires, a high-voltage power switch, and a low-voltage power switch.

[0055] The control system includes a control computer 9 and a CAN-OE.

[0056] The power supply system is connected to the water-heated PTC sample 1; the cooling system is connected to the radiator 6 in the water circulation system; the sensor acquisition and calculation system 7 is connected to the water circulation system, the cabin air conditioning system 2, and the cooling system; when the heating performance of the water-heated PTC unit is tested, or when the heating performance of the water-heated PTC heating system is tested, the control system is connected to the water-heated PTC sample 1 and the water pump 16 in the water circulation system.

[0057] See Figure 1 When testing the heating performance of a single PTC water heater unit, this test mode requires stabilizing the medium flow rate and temperature at the inlet of the tested PTC sample 1. It also requires testing the PTC inlet flow rate, inlet and outlet temperatures, and pressure difference. Based on these parameters, the PTC heating capacity can be calculated. In this test mode, the water circulation system includes a water heating and flow regulation device 3, but no water pump 16.

[0058] The connection sequence of the entire water circulation is as follows: water heating and flow regulation device 3 - flow sensor 11 - first pressure sensor 12 - first temperature sensor 13 - water-heated PTC sample 1 - second temperature sensor 14 - second pressure sensor 15 - radiator 6 - water heating and flow regulation device 3. The power supply system is connected to the test sample; the control system is connected to the test sample and is used to control the PTC power level and read the PTC electrical power; the cooling system is connected to the radiator 6; the enthalpy difference platform 4 of the cooling system is used to cool the medium temperature in the water circulation system. The sensor acquisition and calculation system 7 is used to control the temperature inside the environmental chamber 2, the air velocity at the inlet of the enthalpy difference platform 4, acquire the system water flow rate, the inlet and outlet temperatures and pressures of the test sample, and finally calculate the water-heated PTC heating capacity, PTC flow resistance, and PTC heating efficiency.

[0059] See Figure 2 When testing the heating performance of a PTC water heating system, this test mode requires testing the heat output of the system's terminal output component, namely radiator 6. The system needs to provide a stable medium flow rate, and the heat dissipation of the radiator is calculated based on the inlet and outlet temperatures and pressures. Based on these requirements, the water circulation system does not include the water heating and flow regulation device 3, but it does include the water pump 16.

[0060] The connection sequence of the entire water circulation system is as follows: water pump 16 - PTC sample 1 - second pressure sensor 15 - second temperature sensor 14 - radiator 6 - first temperature sensor 13 - first pressure sensor 12 - water pump 16. The power supply system is connected to the test sample; the control system is connected to the test sample and the water pump 16, and is used to control the PTC power level and read the PTC electrical power. The cooling system is connected to the radiator 6. The enthalpy difference station 4 of the cooling system is used to control the inlet air velocity of the radiator 6 and calculate the heat dissipation on the air side of the radiator 6. The sensor acquisition and calculation system 7 uses the temperature inside the environmental chamber 2, the inlet air velocity of the enthalpy difference station 4, the water circulation system flow rate, the inlet and outlet temperatures and pressures of the radiator 6, and the air humidity and temperature at the inlet and outlet of the radiator 6 to finally calculate the water-side heating amount and the air-side heating amount.

[0061] Example 2

[0062] This invention provides a method for testing the heating performance of a water-based PTC heating system, which is implemented using a device for testing the heating performance of a water-based PTC heating system. The method includes testing the heating performance of individual PTC units and testing the heating performance of the entire water-based PTC heating system.

[0063] The specific method for testing the heating performance of PTC water heater units is as follows:

[0064] This test subject is the PTC heater assembly for a new energy vehicle's water heating system. The water circulation system includes a water heating and flow regulation device 3, but no water pump 16. The PTC sample is the test sample 1. The environmental chamber 2 provides a sealed, insulated, and controlled space. The in-chamber air conditioning system 5 primarily stabilizes the chamber temperature to the required ambient temperature or the radiator 6's inlet air temperature; unless otherwise specified, the chamber temperature is controlled to 25℃. The radiator 6 needs to be selected in advance, and its heat dissipation should be approximately 1.5 times the estimated heat dissipation of the PTC. The cooling system consists of an enthalpy difference platform 4, which cools the liquid medium passing through the radiator. The airflow of the enthalpy difference platform 4 can be finely adjusted via the control computer 9; initially, the airflow speed is recommended to be controlled at around 5 m / s. The inlet air temperature of the enthalpy difference platform 4 is adjusted by the in-chamber air conditioning system 5. The adjustment of the inlet air temperature and flow rate of the enthalpy difference platform 4 is mainly to achieve a greater heat dissipation capacity for the radiator 6. To ensure the water temperature entering the water heating and flow control system is lower than the required PTC inlet temperature, the water heating and flow control system can stabilize the PTC inlet temperature through heating. The water heating and flow regulation device 3 mainly regulates water temperature and flow to ensure stable inlet flow and temperature of the heater. The required set temperature and flow are determined according to the heater's test conditions, and both temperature and flow are controlled and regulated using a PID algorithm. Since only the heating capacity of a single heater is being tested, a pair of pressure and temperature sensors need to be installed at both the heater inlet and outlet. The sensor signal acquisition and calculation system 7 is mainly used to collect the heater inlet and outlet pressure and temperature, as well as the water pump flow, and ultimately calculate the heater's heating capacity. The control system shown is mainly used to control the power level of the test sample. Generally, a control computer 9 and a CAN-oe can be used to achieve communication and control between the control computer 9 and the test sample. During testing, the PTC operating level is adjusted according to the experimental requirements.

[0065] Step 11) Connect the water heating and flow regulation device 3, flow sensor 11, first pressure sensor 12, first temperature sensor 13, water heating PTC sample 1, second temperature sensor 14, second pressure sensor 15, radiator 6 and water heating and flow regulation device 3 in sequence to form a water circulation loop.

[0066] Step 12) Set the temperature of environmental chamber 2 until the temperature inside environmental chamber 2 stabilizes;

[0067] The temperature of environmental chamber 2 is set at 25°C.

[0068] Step 13) Set the water flow rate, inlet water temperature, PTC power setting, enthalpy difference wind speed according to standard requirements;

[0069] In step 13), the enthalpy difference wind speed is 5 m / s.

[0070] Step 14) After the parameters set in Step 13) reach a stable value, the sensor acquisition and calculation system 7 reads the inlet flow rate, inlet and outlet temperature and pressure of the water heating PTC, and calculates the water-side heating amount and flow resistance of the water heating PTC based on the above test parameters.

[0071] Step 15) After the system stabilizes, use the control computer 9 to read the power of the PTC electric side of the water heating system;

[0072] Step 16) Divide the water-side heating amount of the PTC in step 14) by the electric-side power of the PTC in step 15) to calculate the heating efficiency of the PTC under specific operating conditions.

[0073] The specific methods for testing the heating performance of a PTC water-based heating system are as follows:

[0074] This test subject is the PTC water heating system of a new energy vehicle. The water circulation system does not include a water heating and flow regulation device 3, but it does include a water pump 16. The test primarily simulates the actual pipeline testing of a new energy vehicle heating system. The PTC water heating sample 1, water pump 16, radiator 6, and water pipes are all test samples of the system under test. The environmental chamber 2 provides a sealed, insulated, and controlled space. The in-chamber air conditioning system 5 mainly stabilizes the chamber temperature to the required environmental or radiator 6 inlet air temperature, and can be set according to the system heating capacity test conditions. The cooling system consists of an enthalpy difference platform 4. The airflow of the enthalpy difference platform 4 can be finely adjusted by the control computer 9, and the airflow depends on the system test conditions. The inlet air temperature of the enthalpy difference platform 4 is adjusted by the in-chamber air conditioning system 5. Both the inlet air temperature and flow rate of the enthalpy difference platform 4 must be consistent with the system test conditions. Because the heating capacity of the PTC system is being tested, a pair of pressure and temperature sensors need to be installed at both the radiator inlet and outlet. The control system is mainly used to control the power level of the test sample. Generally, communication and control between the control computer 9 and the test sample can be achieved using a control computer 9 and a CAN-oe interface. During testing, the PTC operating level is adjusted according to standard requirements. During testing, the water pump 16, the water-heated PTC sample 1, and the enthalpy difference tester 4 are turned on sequentially, and the PTC power level, water pump 16 flow rate, ambient temperature, and enthalpy difference tester 4 airflow are set sequentially. Finally, the water-side heating capacity of the radiator 6 is calculated based on the inlet and outlet temperatures and water flow rate of the radiator 6. The air-side heating capacity of the PTC system is calculated based on the inlet and outlet temperatures, pressure, humidity, and flow rate of the enthalpy difference tester.

[0075] Step 21) Connect the water pump 16, water heating PTC sample 1, second pressure sensor 15, second temperature sensor 14, radiator 6, first temperature sensor 13, first pressure sensor 12 and water pump 16 in sequence to form a water circulation loop;

[0076] Step 22) Set the temperature of environmental chamber 2 according to the system test conditions until the temperature inside environmental chamber 2 stabilizes;

[0077] Step 23) Set the water pump flow rate, PTC setting, and enthalpy difference tester airflow according to the system test conditions;

[0078] Step 24) After the system stabilizes, the sensor acquisition and calculation system 7 reads the water circulation system flow rate, radiator inlet and outlet temperatures and pressure, and calculates the water-side heat exchange of the system.

[0079] Step 25) Calculate the heat exchange on the air side of the radiator 6 using the enthalpy difference platform and sensor acquisition and calculation system 7, which is the heating amount of the water heating PTC system.

[0080] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the invention. Further modifications can be readily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A heating performance testing device for a water-based PTC heating system, characterized in that, include: A water circulation system is used to provide a water circulation loop; The cabin air conditioning system (5) is used to provide a stable temperature environment for the cabin (2) and radiator air intake according to the test standard requirements. It is an automatic constant temperature system. The cooling system is used to deliver the uniformly heated air in the environmental chamber (2) to the radiator at a stable and uniform speed to cool the water circulation system. The power supply system is used to power the test sample; A control system is used to regulate the power of the test sample and the flow rate of the water pump (16); The sensor acquisition and calculation system (7) is used to control the temperature and air velocity inside the environmental chamber (2), collect water flow, inlet and outlet temperatures and pressures of the PTC sample (1), and finally calculate the PTC heating capacity, PTC flow resistance and PTC heating efficiency. The power supply system is connected to the water-heated PTC sample (1); the cooling system is connected to the radiator (6) in the water circulation system; the sensor acquisition and calculation system (7) is connected to the water circulation system, the cabin air conditioning system (5) and the cooling system; when the heating performance of the water-heated PTC unit is tested, the power supply system is connected to the test sample; the control system is connected to the test sample; when the heating performance of the water-heated PTC heating system is tested, the control system is connected to the water-heated PTC sample (1) and the water pump (16) in the water circulation system; The water circulation system also includes a water heating and flow regulation device (3), a first temperature sensor (13), a second temperature sensor (14), a first pressure sensor (12), a second pressure sensor (15), and a flow sensor (11); when the heating performance of the water heating PTC unit is tested, the water heating and flow regulation device (3), the flow sensor (11), the first pressure sensor (12), the first temperature sensor (13), the water heating PTC sample (1), the second temperature sensor (14), the second pressure sensor (15), the radiator (6), and the water heating and flow regulation device (3) are connected in sequence; when the heating performance of the water heating PTC heating system is tested, the water pump (16), the water heating PTC sample (1), the second pressure sensor (15), the second temperature sensor (14), the radiator (6), the first temperature sensor (13), the first pressure sensor (12), and the water pump (16) are connected in sequence; The cooling system consists of an enthalpy difference platform (4); The power supply system includes a high-voltage power supply (10), a low-voltage power supply (8), wires, a high-voltage power switch and a low-voltage power switch; The control system includes a control computer (9) and CAN-OE.

2. A method for testing the heating performance of a water-based PTC heating system, implemented using the heating performance testing device for a water-based PTC heating system as described in claim 1, characterized in that... This includes heating performance testing of individual PTC water heaters and heating performance testing of PTC water heater systems. The specific method for testing the heating performance of PTC water heater cells is as follows: Step 11) Connect the water heating and flow regulation device (3), flow sensor (11), first pressure sensor (12), first temperature sensor (13), water heating PTC sample (1), second temperature sensor (14), second pressure sensor (15), radiator (6) and water heating and flow regulation device (3) in sequence to form a water circulation loop; Step 12) Set the temperature of the environmental chamber (2) until the temperature inside the environmental chamber (2) stabilizes; Step 13) Set the water flow rate, inlet water temperature, PTC power setting, and enthalpy difference wind speed according to the standard requirements; Step 14) After the parameters set in step 13) reach a stable value, the sensor acquisition and calculation system (7) reads the inlet flow rate, inlet and outlet temperature and pressure of the water heating PTC, and calculates the water-side heating amount and flow resistance of the water heating PTC based on the above test parameters; Step 15) After the system stabilizes, use the control computer (9) to read the power of the PTC electric side of the water heating system; Step 16) Divide the water-side heating amount of the PTC in step 14) by the electric-side power of the PTC in step 15) to calculate the heating efficiency of the PTC under specific working conditions. In step 12), the temperature of the environmental chamber (2) is set to 25°C; In step 13), the enthalpy difference wind speed is 5 m / s; The specific method for testing the heating performance of a water-based PTC heating system is as follows: Step 21) Connect the water pump (16), water heating PTC sample (1), second pressure sensor (15), second temperature sensor (14), radiator (6), first temperature sensor (13), first pressure sensor (12) and water pump (16) in sequence to form a water circulation loop; Step 22) Set the temperature of the environmental chamber (2) according to the system test conditions until the temperature inside the environmental chamber (2) stabilizes; Step 23) Set the water pump flow rate, PTC setting, and enthalpy difference tester air intake volume according to the system test conditions; Step 24) After the system stabilizes, the sensor acquisition and calculation system (7) reads the water circulation system flow rate, radiator inlet and outlet temperatures and pressure, and calculates the water-side heat exchange of the system. Step 25) Use the enthalpy difference platform and sensor acquisition and calculation system to calculate the heat exchange on the air side of the radiator (6), which is the heating amount of the water heating PTC system.

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