Integrated PTC heater test system

Abstract

The utility model discloses an integrated PTC heater test system, and the system is characterized in that a first collection module collects a first state parameter of a circulation loop of an air-heating PTC heater; the second acquisition module acquires a second state parameter of the liquid heating PTC heater circulation loop; the signal test module adjusts an air heating PTC heater circulation loop and a first cooling loop according to the first state parameter, controls the air heating PTC heater circulation loop to meet a first preset test condition, and adjusts a liquid heating PTC heater circulation loop and a second cooling loop according to the second state parameter, the liquid heating PTC heater circulation loop is controlled to meet a second preset test condition, the gating module selects the first cooling loop or the second cooling loop to be conducted according to the control signal output by the signal test module, and the air heating PTC heater circulation loop or the liquid heating PTC heater circulation loop is cooled. The integrated PTC heater test system has the advantage of high integration level.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, and in particular to an integrated PTC heater testing system. Background Art

[0002] When starting and running at low temperatures, new energy pure electric vehicles must ensure that the power battery pack and cabin occupants have a suitable operating temperature. The vehicle thermal management system must have a low-temperature heating function. As the core component of the thermal management system, the importance of the PTC heater is becoming increasingly prominent. Since the PTC heater consumes the most precious power battery power in a low-temperature environment when working, in order to improve the reliability and safety of the vehicle and reduce power consumption, vehicle manufacturers have increasingly higher performance requirements for PTC heaters. In order to develop safer and more efficient PTC heaters, it is necessary to test the various performance parameters of the PTC heater in a low-temperature environment and conduct a comprehensive performance evaluation. According to the different requirements of the thermal management function of the vehicle, PTC heaters are divided into air-heating PTC heaters and liquid-heating PTC heaters. Air-heating PTC heaters are mainly used to provide heated warm air to the vehicle cabin, while liquid-heating PTC heaters have many uses and have become a technical development trend in high-grade vehicles.

[0003] The working medium inside the liquid-heated PTC heater is generally cooling water or coolant, so a closed-loop water cooling system must be built during testing; the working medium inside the air-heated PC heater is air, and performance testing can generally only be performed in large cold storage. Currently, testing these two types of heaters is generally done by building two different test systems to test the two types of heaters separately, resulting in high equipment costs and long test cycles. Utility Model Content

[0004] The utility model provides an integrated PTC heater testing system to solve the problems of high testing system cost and long testing cycle in the prior art.

[0005] According to one aspect of the utility model, an integrated PTC heater test system is provided, comprising a signal test module, a first acquisition module, a second acquisition module, an air-heated PTC heater circulation loop, a liquid-heated PTC heater circulation loop, a first cooling loop, a second cooling loop and a gating module;

[0006] The first acquisition module is connected to the air-heating PTC heater circulation loop, and the first acquisition module is used to acquire the first state parameter of the air-heating PTC heater circulation loop; the second acquisition module is connected to the liquid-heating PTC heater circulation loop, and the second acquisition module is used to acquire the second state parameter of the liquid-heating PTC heater circulation loop;

[0007] The signal testing module is connected to the first acquisition module, the air-heating PTC heater circulation loop and the first cooling loop, the first cooling loop is connected to the air-heating PTC heater circulation loop, the first cooling loop is used to cool the air-heating PTC heater circulation loop, and the signal testing module is used to adjust the working state of the air-heating PTC heater circulation loop and the temperature of the first cooling loop according to the first state parameter, so as to control the air-heating PTC heater circulation loop to meet the first preset test condition;

[0008] The signal testing module is connected to the second acquisition module, the liquid-heating PTC heater circulation loop and the second cooling loop, the second cooling loop is connected to the liquid-heating PTC heater circulation loop, the second cooling loop is used to cool the air-heating PTC heater circulation loop, and the signal testing module is also used to adjust the working state of the liquid-heating PTC heater circulation loop and the temperature of the second cooling loop according to the second state parameter to control the liquid-heating PTC heater circulation loop to meet the second preset test condition;

[0009] The gating module is connected to the first cooling circuit, the second cooling circuit and the signal testing module, and is used to select the first cooling circuit to be turned on or the second cooling circuit to be turned on according to a control signal output by the signal testing module.

[0010] Optionally, the integrated PTC heater testing system further comprises a low-temperature compressor group, wherein the low-temperature compressor group is connected to the signal testing module, and the low-temperature compressor group is used for performing temperature adjustment according to a control signal output by the signal testing module.

[0011] Optionally, the first cooling circuit includes a first refrigerant pipeline, a second refrigerant pipeline, a third refrigerant pipeline, a fourth refrigerant pipeline and the low-temperature compressor unit, the first end of the first refrigerant pipeline is connected to the low-temperature compressor unit, the second end of the first refrigerant pipeline is connected to the first end of the selection module, the second end of the selection module is connected to the first end of the second refrigerant pipeline, the second end of the second refrigerant pipeline is connected to the first end of the air-heating PTC heater circulation circuit, the second end of the air-heating PTC heater circulation circuit is connected to the first end of the third refrigerant pipeline, the second end of the third refrigerant pipeline is connected to the first end of the fourth refrigerant pipeline, and the second end of the fourth refrigerant pipeline is connected to the low-temperature compressor unit.

[0012] Optionally, the second cooling circuit includes a fifth refrigerant pipeline, the first refrigerant pipeline, the fourth refrigerant pipeline and the low-temperature compressor unit, the first end of the first refrigerant pipeline is connected to the low-temperature compressor unit, the second end of the first refrigerant pipeline is connected to the first end of the selection module, the third end of the selection module is connected to the first end of the fifth refrigerant pipeline, the second end of the fifth refrigerant pipeline is connected to the first end of the liquid-heating PTC heater circulation circuit, the second end of the liquid-heating PTC heater circulation circuit is connected to the third end of the fourth refrigerant pipeline, and the second end of the fourth refrigerant pipeline is connected to the low-temperature compressor unit.

[0013] Optionally, the air-heating PTC heater circulation loop includes an air heat exchanger, a fan, a first air pipeline, a second air pipeline and a third air pipeline. The first end of the air heat exchanger is connected to the first end of the air-heating PTC heater circulation loop, the second end of the air heat exchanger is connected to the second end of the air-heating PTC heater circulation loop, the third end of the air heat exchanger is connected to the first end of the first air pipeline, the second end of the first air pipeline is connected to the first end of the air-heating PTC heater, the second end of the air-heating PTC heater is connected to the first end of the second air pipeline, the second end of the second air pipeline is connected to the first end of the fan, the second end of the fan is connected to the first end of the third air pipeline, and the second end of the third air pipeline is connected to the fourth end of the air heat exchanger.

[0014] Optionally, the liquid-heating PTC heater circulation loop also includes a water heat exchanger, a water pump, a first water pipe, a second water pipe and a third water pipe. The first end of the water heat exchanger is connected to the first end of the liquid-heating PTC heater circulation loop, the second end of the water heat exchanger is connected to the second end of the liquid-heating PTC heater circulation loop, the third end of the water heat exchanger is connected to the first end of the first water pipe, the second end of the first water pipe is connected to the first end of the liquid-heating PTC heater, the second end of the liquid-heating PTC heater is connected to the first end of the second water pipe, the second end of the second water pipe is connected to the first end of the water pump, the second end of the water pump is connected to the first end of the third water pipe, and the second end of the third water pipe is connected to the fourth end of the water heat exchanger.

[0015] Optionally, the first acquisition module includes a first flow sensor, a first temperature sensor and a first pressure sensor, and the first flow sensor, the first temperature sensor and the first pressure sensor are installed in the circulation loop of the air-heating PTC heater.

[0016] Optionally, the second acquisition module includes a second flow sensor, a second temperature sensor and a second pressure sensor, and the second flow sensor, the second temperature sensor and the second pressure sensor are installed in the circulation loop of the liquid-heating PTC heater.

[0017] Optionally, the signal testing module includes a host computer, a communication card and an acquisition card, the communication card and the acquisition card are connected to the host computer, the acquisition card is used to transmit the received signal to the host computer, the host computer is used to perform signal processing, and the communication card is used to transmit the control signal output by the host computer.

[0018] Optionally, the selection module includes a three-position two-way switching valve, a first end of the three-position two-way switching valve is connected to the first end of the selection module, a second end of the three-position two-way switching valve is connected to the second end of the selection module, and a third end of the three-position two-way switching valve is connected to the third end of the selection module.

[0019] The technical solution of the embodiment of the utility model provides an integrated PTC heater test system, including a signal test module, a first acquisition module, a second acquisition module, an air-heating PTC heater circulation loop, a liquid-heating PTC heater circulation loop, a first cooling loop, a second cooling loop and a gating module. The first acquisition module acquires the first state parameter of the air-heating PTC heater circulation loop, the second acquisition module acquires the second state parameter of the liquid-heating PTC heater circulation loop, the signal test module adjusts the air-heating PTC heater circulation loop and the first cooling loop according to the first state parameter, controls the air-heating PTC heater circulation loop to meet the first preset test condition, the signal test module adjusts the liquid-heating PTC heater circulation loop and the second cooling loop according to the second state parameter, controls the liquid-heating PTC heater circulation loop to meet the second preset test condition, and the gating module selects the first cooling loop or the second cooling loop to be turned on according to the control signal output by the signal test module, and cools the air-heating PTC heater circulation loop or the liquid-heating PTC heater circulation loop. The integrated PTC heater testing system provided by the utility model can make the testing environment meet the preset conditions and improve the testing accuracy. The integrated PTC heater testing system integrates the air-heating PTC heater testing system and the liquid-heating PTC heater testing system into the same testing system, and has a high degree of integration. It solves the problem of the prior art that two independent testing systems are constructed to test the air-heating PTC heater and the liquid-heating PTC heater respectively, resulting in high equipment cost and long testing cycle.

[0020] 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 utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a structural schematic diagram of an integrated PTC heater testing system provided by an embodiment of the utility model;

[0023] Figure 2 It is a structural schematic diagram of another integrated PTC heater testing system provided by an embodiment of the utility model;

[0024] Figure 3 It is a structural schematic diagram of another integrated PTC heater testing system provided by an embodiment of the utility model;

[0025] Figure 4 It is a structural schematic diagram of another integrated PTC heater testing system provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model 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 utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations 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 clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] Figure 1: is a schematic diagram of the structure of an integrated PTC heater test system provided by an embodiment of the utility model, such as Figure 1 As shown, the integrated PTC heater test system includes a signal test module 110, a first acquisition module 120, a second acquisition module 130, an air-heating PTC heater circulation loop 140, a liquid-heating PTC heater circulation loop 150, a first cooling loop 160, a second cooling loop 170 and a gating module 180; the first acquisition module 120 is connected to the air-heating PTC heater circulation loop 140, and the first acquisition module 120 is used to collect the first state parameter of the air-heating PTC heater circulation loop 140; the second acquisition module 130 is connected to the liquid-heating PTC heater circulation loop 150, and the second acquisition module 130 is used to collect the second state parameter of the liquid-heating PTC heater circulation loop 150; the signal test module 110 is connected to the first acquisition module 120, the air-heating PTC heater circulation loop 140 and the first cooling loop 160, the first cooling loop 160 is connected to the air-heating PTC heater circulation loop 140, the first cooling loop 160 is used to cool the air-heating PTC heater circulation loop 140, and the signal test module 110 is used to collect the second state parameter of the liquid-heating PTC heater circulation loop 150 according to the first The state parameters adjust the working state of the air-heating PTC heater circulation loop 140 and the temperature of the first cooling loop 160 to control the air-heating PTC heater circulation loop 140 to meet the first preset test condition; the signal test module 110 is connected to the second acquisition module 130, the liquid-heating PTC heater circulation loop 150 and the second cooling loop 170, the second cooling loop 170 is connected to the liquid-heating PTC heater circulation loop 150, the second cooling loop 170 is used to cool the liquid-heating PTC heater circulation loop 150, the signal test module 110 is also used to adjust the working state of the liquid-heating PTC heater circulation loop 150 and the temperature of the second cooling loop 170 according to the second state parameters to control the liquid-heating PTC heater circulation loop 150 to meet the second preset test condition; the selection module 180 is connected to the first cooling loop 160, the second cooling loop 170 and the signal test module 110, the selection module 180 is used to select the first cooling loop 160 to be turned on, or to select the second cooling loop 170 to be turned on according to the control signal output by the signal test module 110.

[0029] In this embodiment, the signal test module 110 can test the PTC heater, and can also control the test environment of the PTC heater according to preset test conditions. Among them, the PTC heater is connected in series in the PTC heater circulation loop, that is, the air-heating PTC heater is connected in series in the air-heating PTC heater circulation loop 140, and the liquid-heating PTC heater is connected in series in the liquid-heating PTC heater circulation loop 150. The first acquisition module 120 is a module for collecting the first state parameter in the air-heating PTC heater circulation loop 140, and the second acquisition module 130 is a module for collecting the second state parameter in the liquid-heating PTC heater circulation loop 150. The first state parameter and the second state parameter include temperature, flow, pressure, etc. The air-heating PTC heater circulation loop 140 provides air environment conditions for the air-heating PTC heater test, for example, the air environment conditions include air at a preset temperature and a preset flow rate, and the warm PTC heater circulation loop 150 provides water flow environment conditions for the liquid-heating PTC heater test, for example, the water flow environment conditions include liquid at a preset temperature and a preset flow rate. The first cooling circuit 160 provides low-temperature air for testing the air-heating PTC heater, and the second cooling circuit 170 provides low-temperature liquid for testing the liquid-heating PTC heater. For example, the first cooling circuit 160 and the second cooling circuit 170 include refrigeration equipment. The gating module 180 is a module for selecting whether the first cooling circuit 160 is turned on or the second cooling circuit 170 is turned on. For example, the gating module 180 includes a switch element.

[0030] In this embodiment, when the test system tests the air-heating PTC heater, the signal test module 110 controls the selection module 180 to select the first cooling circuit 160, and the signal test module 110 adjusts the working state of the air-heating PTC heater circulation circuit 140 and the temperature of the first cooling circuit 160 according to the first state parameter collected by the first acquisition module 120, so as to control the air-heating PTC heater circulation circuit 140 to meet the first preset test condition, wherein the first preset condition includes a preset temperature, flow rate, etc. Testing the air-heating PTC heater under the first preset condition can ensure the test accuracy of the air-heating PTC heater. When the test system tests the liquid-heating PTC heater, the signal test module 110 controls the selection module 180 to select the second cooling circuit 170. The signal test module 110 adjusts the working state of the liquid-heating PTC heater circulation circuit 150 and the temperature of the second cooling circuit 170 according to the second state parameter collected by the second acquisition module 130 to control the liquid-heating PTC heater circulation circuit 150 to meet the second preset test condition, wherein the second preset condition includes a preset temperature, flow rate, etc. Testing the liquid-heating PTC heater under the second preset condition can ensure the test accuracy of the liquid-heating PTC heater.

[0031] The technical solution of this embodiment provides an integrated PTC heater test system, including a signal test module, a first acquisition module, a second acquisition module, an air-heating PTC heater circulation loop, a liquid-heating PTC heater circulation loop, a first cooling loop, a second cooling loop and a gating module. The first acquisition module acquires the first state parameter of the air-heating PTC heater circulation loop, the second acquisition module acquires the second state parameter of the liquid-heating PTC heater circulation loop, the signal test module adjusts the air-heating PTC heater circulation loop and the first cooling loop according to the first state parameter, and controls the air-heating PTC heater circulation loop to meet the first preset test condition, the signal test module adjusts the liquid-heating PTC heater circulation loop and the second cooling loop according to the second state parameter, and controls the liquid-heating PTC heater circulation loop to meet the second preset test condition, and the gating module selects the first cooling loop or the second cooling loop to be turned on according to the control signal output by the signal test module, and cools the air-heating PTC heater circulation loop or the liquid-heating PTC heater circulation loop. The integrated PTC heater test system provided in this embodiment can make the test environment meet the preset conditions and improve the test accuracy. The integrated PTC heater test system integrates the air-heating PTC heater test system and the liquid-heating PTC heater test system into the same test system, which has a high degree of integration and solves the problem of high equipment cost and long test cycle in the prior art of testing the air-heating PTC heater and the liquid-heating PTC heater respectively by constructing two independent test systems.

[0032] Figure 2 is a structural schematic diagram of another integrated PTC heater testing system provided by an embodiment of the utility model, such as Figure 2 As shown, the integrated PTC heater test system further includes a low-temperature compressor unit 210 , which is connected to the signal test module 110 . The low-temperature compressor unit 210 is used to adjust the temperature according to the control signal output by the signal test module 110 .

[0033] In this embodiment, the low-temperature compressor unit 210 can perform temperature adjustment according to the control signal output by the signal testing module 110 to control the temperature of the air medium in the air-heating PTC heater circulation loop 140 and the temperature of the liquid medium in the liquid-heating PTC heater circulation loop 150, so that the test environment temperature of the air-heating PTC heater reaches the preset temperature and the test environment temperature of the liquid-heating PTC heater reaches the preset temperature.

[0034] Specifically, the first cooling circuit 160 includes a first refrigerant pipeline 1, a second refrigerant pipeline 2, a third refrigerant pipeline 3, a fourth refrigerant pipeline 4 and a low-temperature compressor unit 210. The first end of the first refrigerant pipeline 1 is connected to the low-temperature compressor unit 210, the second end of the first refrigerant pipeline 1 is connected to the first end of the selection module 180, the second end of the selection module 180 is connected to the first end of the second refrigerant pipeline 2, the second end of the second refrigerant pipeline 2 is connected to the first end of the air-heating PTC heater circulation circuit 140, the second end of the air-heating PTC heater circulation circuit 140 is connected to the first end of the third refrigerant pipeline 3, the second end of the third refrigerant pipeline 3 is connected to the first end of the fourth refrigerant pipeline 4, and the second end of the fourth refrigerant pipeline 4 is connected to the low-temperature compressor unit 210. Among them, the selection module 180 includes a three-position two-way switching valve K, the first end of the three-position two-way switching valve K is connected to the first end of the selection module 180, the second end of the three-position two-way switching valve K is connected to the second end of the selection module 180, and the third end of the three-position two-way switching valve K is connected to the third end of the selection module 180.

[0035] Referring to the above embodiment, when the test system tests the air-heating PTC heater, the signal test module 110 controls the first end and the second end of the three-position two-way switching valve K to be connected, the first refrigerant pipeline 1 and the second refrigerant pipeline 2 are connected, and the first cooling circuit 160 is turned on. The low-temperature compressor unit 210 in the first cooling circuit 160 outputs a preset temperature according to the control signal output by the signal test module 110, and the first refrigerant circuit 160 transmits the preset temperature to the air-heating PTC heater circulation circuit 140, so that the test environment temperature of the air-heating PTC heater reaches the preset temperature.

[0036] Specifically, the second cooling circuit 170 includes a fifth refrigerant pipeline 5, a first refrigerant pipeline 1, a fourth refrigerant pipeline 4 and a low-temperature compressor unit 210. The first end of the first refrigerant pipeline 1 is connected to the low-temperature compressor unit 210, the second end of the first refrigerant pipeline 1 is connected to the first end of the selection module 180, the third end of the selection module 180 is connected to the first end of the fifth refrigerant pipeline 5, the second end of the fifth refrigerant pipeline 5 is connected to the first end of the liquid-warming PTC heater circulation circuit 150, the second end of the liquid-warming PTC heater circulation circuit 150 is connected to the third end of the fourth refrigerant pipeline 4, and the second end of the fourth refrigerant pipeline 4 is connected to the low-temperature compressor unit 210.

[0037] Referring to the above embodiment, when the test system tests the liquid-heating PTC heater, the signal test module 110 controls the first end and the third end of the three-position two-way switching valve K to be connected, the first refrigerant pipeline 1 and the fifth refrigerant pipeline 5 are connected, and the second cooling circuit 170 is turned on. The low-temperature compressor unit 210 in the second cooling circuit 170 outputs a preset temperature according to the control signal output by the signal test module 110, and the second refrigerant circuit 170 transmits the preset temperature to the liquid-heating PTC heater circulation circuit 150, so that the test environment temperature of the liquid-heating PTC heater reaches the preset temperature.

[0038] Figure 3 is a structural schematic diagram of another integrated PTC heater testing system provided by an embodiment of the utility model, such as Figure 3 As shown, the air-heating PTC heater circulation loop 140 includes an air heat exchanger, a fan, a first air pipeline 11, a second air pipeline 12 and a third air pipeline 13. The first end of the air heat exchanger is connected to the first end of the air-heating PTC heater circulation loop 140, the second end of the air heat exchanger is connected to the second end of the air-heating PTC heater circulation loop 140, the third end of the air heat exchanger is connected to the first end of the first air pipeline 11, the second end of the first air pipeline 11 is connected to the first end of the air-heating PTC heater, the second end of the air-heating PTC heater is connected to the first end of the second air pipeline 12, the second end of the second air pipeline 12 is connected to the first end of the fan, the second end of the fan is connected to the first end of the third air pipeline 13, and the second end of the third air pipeline 13 is connected to the fourth end of the air heat exchanger.

[0039] In this embodiment, the air heat exchanger is a heat exchange device for adjusting the temperature and realizing the heat exchange between the low-temperature refrigerant and the hot air. For example, the air heat exchanger adopts a plate-fin liquid-to-air heat exchanger. A fan is a device that converts mechanical energy into airflow kinetic energy, and its main function is to generate airflow and increase pressure. The air pipeline is a pipeline for transmitting air. Referring to the above embodiment, the signal test module 110 controls the first end and the second end of the three-position two-way switching valve K to be connected, and the low-temperature compressor unit 210 in the first cooling circuit 160 inputs the low-temperature refrigerant into the liquid side of the plate-fin liquid-to-air heat exchanger. The fan conveys air into the air-heating PTC heater, and the heated air enters the air side of the plate-fin liquid-to-air heat exchanger. The low-temperature refrigerant absorbs the heat on the air side to realize the heat exchange of the air in the air-heating PTC heater circulation loop 140, and the low-temperature air flows back into the fan inlet again, realizing the closed loop of air flow and temperature stability, so that the air temperature of the air-heating PTC heater circulation loop 140 is reduced to a preset temperature.

[0040] Continue to refer Figure 3The liquid-heating PTC heater circulation loop 150 also includes a water heat exchanger, a water pump, a first water pipe 21, a second water pipe 22 and a third water pipe 23. The first end of the water heat exchanger is connected to the first end of the liquid-heating PTC heater circulation loop 150, the second end of the water heat exchanger is connected to the second end of the liquid-heating PTC heater circulation loop 150, the third end of the water heat exchanger is connected to the first end of the first water pipe 21, the second end of the first water pipe 21 is connected to the first end of the liquid-heating PTC heater, the second end of the liquid-heating PTC heater is connected to the first end of the second water pipe 22, the second end of the second water pipe 22 is connected to the first end of the water pump, the second end of the water pump is connected to the first end of the third water pipe 23, and the second end of the third water pipe 23 is connected to the fourth end of the water heat exchanger.

[0041] In this embodiment, the water heat exchanger is a heat exchange device that can transfer the heat of a fluid with a higher temperature to another fluid with a lower temperature, thereby achieving heating, cooling, etc. For example, the water heat exchanger adopts a plate-fin liquid-liquid heat exchanger. The water pump is a machine for conveying liquid or pressurizing liquid, and the water pipeline is a pipeline for conveying water. Referring to the above embodiment, the signal test module 110 controls the first end and the third end of the three-position two-way switching valve K to be connected, and the low-temperature compressor unit 210 in the second cooling circuit 170 inputs the low-temperature refrigerant to one side of the plate-fin liquid-liquid heat exchanger. The water pump conveys water into the liquid-heating PTC heater, and the heated water enters the other side of the plate-fin liquid-liquid heat exchanger. The low-temperature refrigerant absorbs the heat of the water to realize heat exchange with the water in the liquid-heating PTC heater circulation loop 150, and the low-temperature water flows back into the water pump inlet again, realizing the closed loop of water flow and temperature stability, so that the temperature of the water in the liquid-heating PTC heater circulation loop 150 is reduced to the preset temperature.

[0042] Figure 4 is a structural schematic diagram of another integrated PTC heater testing system provided by an embodiment of the utility model, such as Figure 4 As shown, the first acquisition module 120 includes a first flow sensor Q1 , a first temperature sensor T1 and a first pressure sensor F1 , and the first flow sensor Q1 , the first temperature sensor T1 and the first pressure sensor F1 are installed in the air-heating PTC heater circulation loop 140 .

[0043] With reference to the above embodiment, when the test system tests the air-heating PTC heater, the signal test module 110 controls the first and second ends of the three-position two-way switching valve K to be connected, the first cooling circuit 160 is turned on, the signal test module 110 receives the flow value collected by the first flow sensor Q1, the temperature value collected by the first temperature sensor T1, and the pressure value collected by the first pressure sensor F1 and performs data processing, and the signal test module 110 adjusts the blowing speed of the fan in the air-heating PTC heater circulation circuit 140 and the temperature of the low-temperature compressor 210 in the first cooling circuit 160 according to the processed data to control the air-heating PTC heater circulation circuit 140 to meet the first preset test condition. The signal test module 110 is also connected to the air-heating PTC heater to monitor the voltage, current and other working parameters of the air-heating PTC heater to ensure the reliable operation of the test system.

[0044] Continue to refer Figure 4 The second acquisition module 130 includes a second flow sensor Q2, a second temperature sensor T2 and a second pressure sensor F2. The second flow sensor Q2, the second temperature sensor T2 and the second pressure sensor F2 are installed in the liquid heating PTC heater circulation loop 150.

[0045] With reference to the above embodiment, when the test system tests the liquid-heating PTC heater, the signal test module 110 controls the first and third ends of the three-position two-way switching valve K to be connected, the second cooling circuit 170 is turned on, the signal test module 110 receives the flow value collected by the second flow sensor Q2, the temperature value collected by the second temperature sensor T2, and the pressure value collected by the second pressure sensor F2 and performs data processing, and the signal test module 110 adjusts the water flow of the water pump in the liquid-heating PTC heater circulation circuit 150 and the temperature of the low-temperature compressor 210 in the second cooling circuit 170 according to the processed data to control the liquid-heating PTC heater circulation circuit 150 to meet the second preset test condition. The signal test module 110 is also connected to the liquid-heating PTC heater to monitor the voltage, current and other working parameters of the liquid-heating PTC heater to ensure the reliable operation of the test system.

[0046] Continue to refer Figure 4 The signal test module 110 includes a host computer, a communication card and an acquisition card. The communication card and the acquisition card are connected to the host computer. The acquisition card is used to transmit the received signal to the host computer. The host computer is used to process the signal. The communication card is used to transmit the control signal output by the host computer. Among them, the communication card adopts a 485 communication card to convert and transmit the data output by the host computer. It has a high communication rate and strong anti-interference ability. The acquisition card adopts an AD acquisition card. The AD acquisition card can perform analog-to-digital conversion on the collected data and transmit the converted digital information to the host computer, so that the host computer can process the information.

[0047] The integrated PTC heater test system provided in this embodiment can integrate the air-heating PTC heater test system and the liquid-heating PTC heater test system into the same test system, and control the air-heating PTC heater circulation loop 140 to reach the preset test conditions as required, and control the liquid-heating PTC heater circulation loop 150 to reach the preset test conditions, thereby improving the test accuracy of the air-heating PTC heater and the liquid-heating PTC heater. At the same time, the integrated PTC heater test system has a high degree of integration, while reducing the equipment manufacturing cost and shortening the test cycle.

[0048] 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 performed 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.

[0049] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. 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 utility model shall be included in the protection scope of the present utility model.

Claims

1. An integrated PTC heater testing system, characterized in that: It includes a signal test module, a first acquisition module, a second acquisition module, an air-heating PTC heater circulation loop, a liquid-heating PTC heater circulation loop, a first cooling loop, a second cooling loop and a gating module; The first acquisition module is connected to the air-heating PTC heater circulation loop, and the first acquisition module is used to acquire the first state parameter of the air-heating PTC heater circulation loop; the second acquisition module is connected to the liquid-heating PTC heater circulation loop, and the second acquisition module is used to acquire the second state parameter of the liquid-heating PTC heater circulation loop; The signal testing module is connected to the first acquisition module, the air-heating PTC heater circulation loop and the first cooling loop, the first cooling loop is connected to the air-heating PTC heater circulation loop, the first cooling loop is used to cool the air-heating PTC heater circulation loop, and the signal testing module is used to adjust the working state of the air-heating PTC heater circulation loop and the temperature of the first cooling loop according to the first state parameter, so as to control the air-heating PTC heater circulation loop to meet the first preset test condition; The signal testing module is connected to the second acquisition module, the liquid-heating PTC heater circulation loop and the second cooling loop, the second cooling loop is connected to the liquid-heating PTC heater circulation loop, the second cooling loop is used to cool the air-heating PTC heater circulation loop, and the signal testing module is also used to adjust the working state of the liquid-heating PTC heater circulation loop and the temperature of the second cooling loop according to the second state parameter to control the liquid-heating PTC heater circulation loop to meet the second preset test condition; The gating module is connected to the first cooling circuit, the second cooling circuit and the signal testing module, and is used to select the first cooling circuit to be turned on or the second cooling circuit to be turned on according to a control signal output by the signal testing module.

2. The integrated PTC heater testing system according to claim 1, characterized in that: It also includes a low-temperature compressor group, which is connected to the signal testing module and is used to adjust the temperature according to the control signal output by the signal testing module.

3. The integrated PTC heater testing system according to claim 2, characterized in that: The first cooling circuit includes a first refrigerant pipeline, a second refrigerant pipeline, a third refrigerant pipeline, a fourth refrigerant pipeline and the low-temperature compressor unit. The first end of the first refrigerant pipeline is connected to the low-temperature compressor unit, the second end of the first refrigerant pipeline is connected to the first end of the selection module, the second end of the selection module is connected to the first end of the second refrigerant pipeline, the second end of the second refrigerant pipeline is connected to the first end of the air-heating PTC heater circulation circuit, the second end of the air-heating PTC heater circulation circuit is connected to the first end of the third refrigerant pipeline, the second end of the third refrigerant pipeline is connected to the first end of the fourth refrigerant pipeline, and the second end of the fourth refrigerant pipeline is connected to the low-temperature compressor unit.

4. The integrated PTC heater testing system according to claim 3, characterized in that: The second cooling circuit includes a fifth refrigerant pipeline, the first refrigerant pipeline, the fourth refrigerant pipeline and the low-temperature compressor unit. The first end of the first refrigerant pipeline is connected to the low-temperature compressor unit, the second end of the first refrigerant pipeline is connected to the first end of the selection module, the third end of the selection module is connected to the first end of the fifth refrigerant pipeline, the second end of the fifth refrigerant pipeline is connected to the first end of the liquid-warming PTC heater circulation circuit, the second end of the liquid-warming PTC heater circulation circuit is connected to the third end of the fourth refrigerant pipeline, and the second end of the fourth refrigerant pipeline is connected to the low-temperature compressor unit.

5. The integrated PTC heater testing system according to claim 1, characterized in that: The air-heating PTC heater circulation loop includes an air heat exchanger, a fan, a first air pipeline, a second air pipeline and a third air pipeline. The first end of the air heat exchanger is connected to the first end of the air-heating PTC heater circulation loop, the second end of the air heat exchanger is connected to the second end of the air-heating PTC heater circulation loop, the third end of the air heat exchanger is connected to the first end of the first air pipeline, the second end of the first air pipeline is connected to the first end of the air-heating PTC heater, the second end of the air-heating PTC heater is connected to the first end of the second air pipeline, the second end of the second air pipeline is connected to the first end of the fan, the second end of the fan is connected to the first end of the third air pipeline, and the second end of the third air pipeline is connected to the fourth end of the air heat exchanger.

6. The integrated PTC heater testing system according to claim 1, characterized in that: The liquid-heating PTC heater circulation loop also includes a water heat exchanger, a water pump, a first water pipe, a second water pipe and a third water pipe. The first end of the water heat exchanger is connected to the first end of the liquid-heating PTC heater circulation loop, the second end of the water heat exchanger is connected to the second end of the liquid-heating PTC heater circulation loop, the third end of the water heat exchanger is connected to the first end of the first water pipe, the second end of the first water pipe is connected to the first end of the liquid-heating PTC heater, the second end of the liquid-heating PTC heater is connected to the first end of the second water pipe, the second end of the second water pipe is connected to the first end of the water pump, the second end of the water pump is connected to the first end of the third water pipe, and the second end of the third water pipe is connected to the fourth end of the water heat exchanger.

7. The integrated PTC heater testing system according to claim 1, characterized in that: The first acquisition module includes a first flow sensor, a first temperature sensor and a first pressure sensor, and the first flow sensor, the first temperature sensor and the first pressure sensor are installed in the circulation loop of the air-heating PTC heater.

8. The integrated PTC heater testing system according to claim 1, characterized in that: The second acquisition module includes a second flow sensor, a second temperature sensor and a second pressure sensor. The second flow sensor, the second temperature sensor and the second pressure sensor are installed in the circulation loop of the liquid-heating PTC heater.

9. The integrated PTC heater testing system according to claim 1, characterized in that: The signal testing module includes a host computer, a communication card and an acquisition card. The communication card and the acquisition card are connected to the host computer. The acquisition card is used to transmit the received signal to the host computer. The host computer is used to perform signal processing. The communication card is used to transmit the control signal output by the host computer.

10. The integrated PTC heater testing system according to claim 1, characterized in that: The gating module includes a three-position two-way switching valve, a first end of the three-position two-way switching valve is connected to a first end of the gating module, a second end of the three-position two-way switching valve is connected to a second end of the gating module, and a third end of the three-position two-way switching valve is connected to a third end of the gating module.

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