THREE-WAY THERMOSTAT TEST SYSTEM

Abstract

The invention relates to the determination of the temperature-dependent characteristics of three-way thermostats (thermostatic valves) manufactured for use in fuel lines and the execution of accelerated life tests under thermal load. Specifically, the invention relates to a three-way thermostat (40) test system comprising a double-line heat exchanger (30) where two separate circuits, fuel line and water line, are joined to ensure heat transfer without the fluids mixing; a water tank (60) in which the water conveyed to the said double-line heat exchanger (30) is stored; a resistor (70) which heats the water in the water tank (60) to indirectly heat the fuel; a water pump (80) which ensures the circulation of water within the system; and a controller (100) which manages all system components based on the temperature data at the inlet of the three-way thermostat (40).

Description

1 TARIFF THREE-WAY THERMOSTAT TEST SYSTEM TECHNICAL FIELD The invention relates to the production of three-way thermostats (thermostatic 5) for use in fuel lines. Determination of temperature-dependent characteristics of valves and their thermal load It involves conducting accelerated life tests. The invention specifically allows the fuel circulating in the system to not come into direct contact with a heater. To provide heating or cooling; two separate lines, a fuel line and a water line. 10 a pair of circuits where heat transfer occurs without the fluids mixing inline heat exchanger, water tank in which the water transferred to the said double-line heat exchanger is stored, A heating element that indirectly heats the fuel by heating the water inside the tank. A water pump ensures the circulation of water within the system, connecting all system components. (resistance, fans) management, based on the temperature data at the inlet of the 3-way thermostat 15 It relates to a three-way thermostat test system that includes a controller. STATE OF THE ART Three-way thermostats (thermostatic valves) are used in heating, cooling, and especially automotive fuel systems. In fluid circuits such as systems, it depends on the temperature of the fluid within the system. enabling automatic orientation and ensuring the system is in optimum thermal balance. They are critical control elements that guarantee its stability. They are usually found within their internal structures. temperature-sensitive expansion elements (e.g., wax thermostatic elements) These valves, which operate via a system, open one port when the fluid reaches a specified temperature threshold. By closing one and opening the other, they redirect the flow to the heater, cooler, or bypass line. This Functional controls of thermostats; full opening and closing of the valve as intended. suitability for different temperatures, sealing performance under pressure, and flow transitions. This includes verifying reaction time and hysteresis behaviors; the system 2 these post-production operational capabilities in terms of safety and energy efficiency Testing under simulated real working conditions is of great importance. In the current technique, those used for similar purposes or found in the literature (for example) In some test setups (CN103954381), the fluid passing through the system (usually 5 It is known that water is directly heated and cooled and passed through a test container. However, this The structures focus on conditioning the fluid to only two specific temperature values. and requires gas-based external cooling systems for the cooling process. This These types of systems involve the fluid being in direct contact with the heater and the use of a single type of fluid. These structures require 10 for thermostat testing where sensitive fluids such as fuel are used. the perceived indirect heating infrastructure where different fluids condition each other It does not provide. When other applications included in the current technology are examined (for example, CN104251785 and CN106124393), test systems mostly measure the purification capacity of water treatment devices 15 or appears to focus on measuring the amount of corrosion / wear in pipelines. In these studies, tests are either performed in parts at different times or in fluid environments. By maintaining a constant temperature, only pressure and flow rate are monitored. Three-way the ability of thermostats to respond to varying temperatures, which is their basic operating principle and to determine the fatigue life under thermal cycling, the system is subjected to a dynamic thermal load of 20 The inability to create it and the inability to actively use temperature as a variable parameter are important. It is a deficiency. Current technology focuses on studies aimed at evaluating the performance of three-way valves. (e.g., CN119246056) are available, but these systems generally use a single fluid. 25 The tank is available and the fluid is not subjected to any heating or cooling process. is circulated. However, temperature-sensitive thermostatic valves (thermostatic elements) precise adjustment of the fluid temperature so that (including) it can be tested It is mandatory. In such systems where thermal conditioning is not performed, the thermostat's functionality... 3 testing the accuracy of opening and closing and its temperature-dependent characteristics. It is insufficient. In current technology, quantities such as temperature, pressure, and flow rate in the systems mentioned above... Even though they were manipulated and recorded, the same 5 different types of fluids were present within the test setup. that it was in the cycle at that moment, especially the test fuel, not directly, but via a heat exchanger. a hybrid structure in which it is indirectly heated and cooled by another fluid in the system There are none. Existing systems rely on the direct heating of fuel or not at all. Failure to heat the product creates both safety risks and interferes with its actual operation. Accelerated life tests under thermal load simulating the conditions are precise and 10 This prevents it from being performed in an integrated manner. In conclusion, in order to solve the aforementioned problems that exist in the current technology, The need for a new, economical, and practical testing system and the existing solutions The deficiency has made it necessary to make an improvement in the relevant technical field. 15 THE PURPOSE OF THE INVENTION The present invention aims to eliminate the aforementioned disadvantages and contribute to the relevant technical field. Developed to offer new advantages, three-way thermostats have 20 temperature-dependent options. to analyze their behavior under thermal load using the indirect heating method It relates to a test system developed to perform accelerated life tests. The main purpose of the invention is to improve the fuel used in testing fuel line thermostats. Instead of being heated directly by a resistor or heater, 25 is heated through a heat exchanger integrated into the system. and indirectly by a different fluid circulating in the system (hot water / oil, etc.) The aim is to heat the fuel. This allows the flammable / combustible fuel to be heated during testing. Test safety is maximized by preventing direct contact with the high-temperature source. This allows for more homogeneous and precise control of fuel temperature. 30 4 Another important objective of the invention is to determine the temperature-dependent characteristics of three-way thermostats. Accelerated lifecycle management, where service life is determined by verifying its characteristics. The goal is to ensure that the tests are performed on a single system configuration. This integrated system... The need to establish separate setups for structural, functional checks and life cycle tests. It offers time and cost advantages by eliminating these issues. 5 Another important objective of the invention is to test different types of fluids within the test setup (test a hybrid flowchart that allows fuel and conditioning fluid to be present simultaneously to create and test the actual product on the test via heat transfer of these fluids The goal is to create a dynamic thermal load that simulates the operating conditions. 10 Thus, the thermostat can handle not only constant temperatures but also variable and challenging thermal conditions. Performance across cycles can also be analyzed with high accuracy. The structural and characteristic features and all the advantages of the invention are given in the figures below. Thanks to the detailed explanation written with references to these figures, 15 This will be understood, and therefore the evaluation should also take these forms and detailed explanations into consideration. It needs to be done by taking precautions. FIGURES THAT WILL HELP UNDERSTAND THE INVENTION FIGURE -1; Showing the circuit diagram of the three-way thermostat test system, which is the subject of the invention. It is a picture. REFERENCE NUMBERS 10. Fuel Tank 20. Pump Block 25 30. Double-Line Heat Exchanger 40. 3-Way Fuel Thermostat 50. Fan-assisted Heat Exchanger-1 60. Water Tank 70. Resistor 80. Water Pump 5 90. Fan-assisted Heat Exchanger-2 100. Controller 110. CAN Interface Sensor 120. 10 DETAILED DESCRIPTION OF THE INVENTION This detailed explanation describes the preferred configurations for a three-way thermostat test system. purely for the purpose of better understanding the subject and without any limiting influence. It is explained in a way that will not create a problem. 15 The invention is based on the three-way fuel thermostat (40) that is to be tested. a primary circuit (fuel line) and conditioning the fluid in that primary circuit a secondary circuit (water / conditioning fluid) designed for (heating or cooling) It is a hybrid test system consisting of (line) 20 The test system, whose circuit diagram is given in Figure 1, uses fuel as the test fluid. It includes a fuel tank (10) in which (e.g. diesel fuel) is stored. The fuel tank in question (10), for safety reasons and to prevent the evaporation of fuel into the atmosphere 6 It is designed as a closed structure and serves as the main reservoir for the fuel circulating in the system. The outlet line of the fuel tank (10) sees the circulation of fuel within the system. It is connected to a pump block (20) which provides. This pump block (20) contains a filter element that cleans the fuel and determines the fuel flow rate (rate) It contains a pump mechanism that regulates the flow. 5 The operating parameters of the pump block (20), especially the flow control, are a system a CAN interface (110) that enables communication with a computer or automation system It is managed through this system. This allows the pump speed to be dynamically adjusted according to the test scenario. It can be modified accordingly, and precise flow control is provided. 10 Fuel pumped from the pump block (20) is pumped into the double-line heat transfer center of the system. This double-line heat is transmitted to the heat exchanger (30) (e.g. plate or tube type heat exchanger). The heat exchanger (30) is one of the most critical components of the invention, with fuel on one side and the other side On the other side, the conditioning fluid (water) circulates, and the two fluids do not mix. 15 It is a structure that allows heat exchange between them. Thanks to this structure, combustible materials... Fuel of this type should not be brought into direct contact with a heater. The fuel (heated or cooled) coming out of the double-line heat exchanger (30) is subjected to the test process. The 3-way fuel thermostat (40) is directed to the inlet port of the 3-way thermostat. Fuel thermostat (40), on which the test system that is the subject of the patent application worked It is the main sample. The thermostat (40) adjusts the temperature of the fuel coming to its inlet according to the temperature value of the fuel coming to its inlet. By moving its mechanism, it proportionally directs the flow to the output ports. Lines branching off from the output ports of the thermostat (40) direct the flow of the thermostat. After their performance is measured, they reunite to form a single line. 25 The fuel line passing through the thermostat (40) and merging provides an additional cooling capacity in the system. The fan heat exchanger -1 (50) is connected to the heat exchanger -1 (50). This fan heat exchanger -1 (50) has the following on it: By using ambient air via a fan, it reduces the temperature of the fuel passing through it. 7 It is structured accordingly. To complete the cycle, fan heat exchanger-1 (50) The fuel line exiting the tank is returned to the fuel tank (10). Thus, the primary circuit (The fuel cycle) is completed. In Figure 1, this fuel line flow is shown with straight lines and arrows. It has been shown. 5 The secondary circuit (water line) that provides heating and cooling energy to the system is the conditioning circuit. a container in which liquid (preferably water) is stored, open to the atmosphere to allow for expansion. It contains a water tank (60). Into this water tank (60), water can be heated directly. An electric resistor (70) (heating element) is installed in the tank (60). The water inside is sucked out by means of a water pump (80) and transferred to the water of the double line heat exchanger (30). Pressure is applied to the input port. Here, hot or cold water circulating in the double-line heat exchanger (30) passes through the exchanger. It transfers heat energy without coming into contact with the fuel circulating in the other line. The water coming out of the heat exchanger (30) is used when the water in the secondary circuit needs to be cooled. It is transferred to another fan heat exchanger -2 (90). This fan heat exchanger -2 (90), By lowering the water temperature thanks to the fan on top, it indirectly reduces the fuel temperature as well. It contributes to its cooling. The water line coming out of Fan Heat Exchanger-2 (90) returns to the water tank. (60) completes the secondary circuit by turning. In Figure 1, this waterline flow is shown with dashed lines and It is indicated by arrows. 20 The management of all these components (resistors and fans) of the system described in the invention is centralized. is provided by the controller (100). The controller (100) only controls the thermostat. By collecting temperature data from the temperature sensor located at the inlet, it provides resistance and fan-assisted heating. It opens and closes its heat exchangers. 25 from the temperature, pressure and flow sensors (120) All of its values ​​are a data collection computer independent of the controller (100). It is recorded using [method]. 8 The operating principle of the system and the management algorithm of the controller (100) are as follows: is being carried out: Heating Phase (Thermal Loading): 5 When the fuel temperature needs to be increased as part of the test procedure (for example, in the room) water temperature (75°C and above), controller (100); activates resistance (70) It heats the water in the tank (60). Meanwhile, the fan heat exchangers (50,90) that provide cooling are in circuit. It is left outside (passive). The heated water is sent to the double line heat exchanger (30) by the water pump (80). and transfers its heat to the fuel in the fuel line. Thus, the fuel is safely and indirectly heated. 10 The temperature is raised to the target test temperature. During this time, the 3-way fuel thermostat (40) Temperature-dependent on / off responses are monitored. Cooling Phase (Thermal Cycle): When the fuel temperature reaches the upper limit value or sudden cooling is required for a thermal shock test 15 When requested, the controller (100) switches off the resistance (70). Simultaneously, both the fuel line fan heat exchanger-1 (50) on the water line and fan heat exchanger-2 (90) The system is activated (the fans are started). In this case, the system uses hybrid cooling. It performs; the fuel is cooled both directly by the heat exchanger-1 (50) in its line and Cooling of the water by heat exchanger-2 (90) in the water line and cooling of the cooled water by double line heat exchanger 20 It is cooled indirectly by extracting heat from the fuel through (30). This double-effect cooling The mechanism enables accelerated life tests by shortening test cycle times. It increases efficiency. When the fuel temperature drops to the specified lower limit (e.g. 45°C), the controller (100) turns the fans 25 It restarts the cycle by switching off and then switching the resistor (70) back on. In Figure 1 Signal and control lines between the controller (100) and the components are marked with dotted lines. It has been shown. 9 The test system collects data via the aforementioned sensors and the CAN interface (110). By connecting to the computer, it monitors temperature changes, thermostat on / off times, and pressure. Fluctuations and hysteresis curves are recorded as time-dependent graphs. It is being collected and can be reported. 5 The scope of protection in this application is defined in the claims section and is explicitly stated above. The examples given cannot be limited to those described; a person skilled in the technique can make a difference in the invention. the innovation presented can be achieved by using similar structures and / or This structure can also be applied to other similar fields using the same technology. It is clear that it can be implemented. Therefore, such structures foster innovation and especially technology. It is also obvious that it will lack the criterion of exceeding the known situation.

Claims

REQUESTS 1- The invention is a fuel tank (10) that holds the fuel to be tested and is closed to the atmosphere. a fuel pump block (20) that provides circulation of fuel within the system Temperature-dependent characteristic of three-way thermostats (40) used in the lines 5 related to a test system developed for determining its characteristics and conducting lifespan tests. Its characteristic is; - the fuel circulating in the system does not come into direct contact with a heater to provide heating or cooling; fuel line and water line where two separate circuits merge, and the fluids transfer heat without mixing. a double line heat exchanger in which the transfer takes place (30), - water tank in which the water transferred to the said double line heat exchanger (30) is stored (60), - heating the fuel indirectly by heating the water in the water tank (60) a resistance (70), 15 - a water pump (80) that ensures the circulation of water within the system, - management of all system components, inlet of the 3-way thermostat (40) a controller that performs based on temperature data (100) It is characterized by its inclusion. 20 2- A test system that conforms to Claim 1, and its feature is; the aforementioned double-line heating To reduce the temperature of the fuel coming out of the heat exchanger (30) on the fuel line It includes a fan heat exchanger-1 (50) which is positioned and cools with the help of a fan. It is the characterization of the situation. 25 3- A test system conforming to Claim 1, characterized by its dual-line heating system. by reducing the temperature of the water coming out of the heat exchanger (30) the fuel is cooled indirectly. A fan-assisted cooling system positioned above the waterline to provide support. It is characterized by containing a fan heat exchanger-2 (90). 11 4- A test system that complies with Claim 1, and whose characteristics include measuring the system's temperature, pressure, and flow rate. by measuring the data in real time and transmitting it to the data collection computer, the system is tested. It is characterized by containing sensors (120) that enable it to be managed according to the scenario. It is done. 5 5- It is a test system in accordance with Claim 1, and its feature is that it receives data from the mentioned sensor (120). According to the fuel temperature data, activate the resistance (70) in the heating phase and the fan heat exchangers. (50,90) will be disabled; in the cooling phase, the resistor (70) will be switched off and the fan will be heated. It includes a controller (100) configured to commission its heat exchangers (50,90). It is characterized by... 10 6- It is a test system in accordance with Claim 1, and its feature is; the flow rate of the pump block (20). to ensure control and data communication between the computer and the pump block. It is characterized by having a CAN interface (110) to perform this function. 15 7- A test system that conforms to Claim 1, characterized by its ability to accommodate the expansion of water. It is characterized by containing an open-structured water tank (60) for the purpose of identification. It is done. 20