Water consumption mode testing device for heat pump water heater

Abstract

The utility model relates to a water use mode testing device for a heat pump water heater, which comprises a constant-temperature water tank, a water outlet of the constant-temperature water tank is connected with a water inlet of a water pump, a water outlet of the water pump is connected with a first ball valve, and the first ball valve is connected with a second ball valve. The pressure regulating valve is connected with a fourth ball valve and then connected with a water inlet of the constant-temperature water tank, the second ball valve is connected with a water inlet of the tested heat pump water heater through a pipeline provided with an inlet water temperature sensor, and a water outlet of the tested heat pump water heater is connected with a third ball valve through a pipeline provided with an outlet water temperature sensor. The third ball valve is connected with a flow regulating valve through a pipeline, the flow regulating valve is connected with a water discharging pneumatic valve through a pipeline, and the water discharging pneumatic valve discharges water through a pipeline provided with a flow meter; the device meets the European Union water heater test standard EN16147 and is easy to mount and dismount.

Description

Technical Field

[0001] This utility model relates to the technical field of water heater testing devices, specifically to a test device for the water usage mode of a heat pump water heater. Background Technology

[0002] The EU water heater testing standard EN16147 proposes using SCOP. DHW This test evaluates the energy efficiency of heat pump water heaters, simulating the actual energy efficiency of user water usage. The test includes six main phases: Phase A is the heating and temperature rise period; Phase B measures the standby input power; Phase C is the water circulation phase; and Phase D is the maximum usable hot water volume phase. Phase C is the coefficient of performance (COP) for water circulation, as assessed by the European Union. DHW In this phase, the testing method involves developing a water discharge pattern that best simulates typical household hot water usage habits over a 24-hour period (including discharge time, flow rate, temperature, and flow velocity). The water is circulated according to specific usage purposes and volumes. Water heaters are categorized into eight different models based on their intended use, each with designated discharge time, flow rate, and internal energy requirements. Temperature and electrical parameters are recorded throughout the 24-hour discharge process, and the coefficient of performance (COP) for the entire discharge cycle is calculated after the discharge is completed. DHW The calculation method is the ratio of all useful heat during the entire water release process to the total electricity consumption during the entire 24-hour water release process.

[0003] Because the testing methods for energy efficiency of Chinese standard water heaters differ significantly from those of the European Union standard, the testing equipment for Chinese standard water heaters is not compatible with the European standard. The key difference in laboratory equipment lies in the fact that the European standard energy efficiency test requires timed and quantitative water discharge, imposing restrictions on the flow rate, the lower limit temperature for calculating the internal energy of the discharged water, and the minimum temperature for discharge. Furthermore, it specifies deviation requirements for the internal energy of each discharge. Water is discharged under these constraints, and the actual internal energy of the discharged water is calculated to determine the energy efficiency index.

[0004] The current national standard GB / T23137-2020 calculates the energy efficiency of heating water from 15℃ to 55℃. As a result, domestic testing institutions or heat pump companies' laboratories cannot test samples according to the EU water heater testing standards. They need to upgrade their laboratory hardware and control software, which requires the laboratory to be shut down during the upgrade process, resulting in significant economic losses. Utility Model Content

[0005] This utility model provides a heat pump water heater water usage mode test device to solve the problem of significant economic losses caused by updating existing devices that meet national energy efficiency test standards but do not meet EU water heater energy efficiency test procedures.

[0006] This utility model provides a heat pump water heater water usage mode test device, comprising: a constant temperature water tank, the outlet of which is connected to the inlet of a water pump via a pipeline, the outlet of which is connected to a first ball valve, the first ball valve being connected to a second ball valve via a pipeline, a first water distribution ball valve, a pressure regulating valve, and a pressure sensor being installed on the pipeline between the first and second ball valves, the first water distribution ball valve being connected to an expansion tank, the pressure regulating valve being connected to a fourth ball valve via a pipeline and then to the inlet of the constant temperature water tank, and the second ball valve being connected to an inlet valve via a pipeline. The water temperature sensor is connected to the inlet of the heat pump water heater under test. The outlet of the heat pump water heater under test is connected to a third ball valve through a pipe equipped with an outlet water temperature sensor. The third ball valve is connected to a flow regulating valve through a pipe. The flow regulating valve is connected to a drain pneumatic valve through a pipe. The drain pneumatic valve discharges water through a pipe equipped with a flow meter. A pre-drain pneumatic water distribution valve is installed on the pipe at the inlet of the second ball valve. The pre-drain pneumatic water distribution valve is connected to the pipe between the flow regulating valve and the drain pneumatic valve through a pipe.

[0007] As one possible implementation, a portion of the pipeline between the first ball valve and the first water distribution ball valve, a portion of the pipeline between the pressure regulating valve and the fourth ball valve, a portion of the pipeline between the pressure sensor and the second ball valve, a portion of the pipeline between the pre-drain pneumatic water distribution valve and the pipeline at the inlet of the second ball valve, and a portion of the pipeline between the third ball valve and the flow regulating valve are flexible hoses.

[0008] As one possible implementation, a thermocouple is installed in the constant temperature water tank.

[0009] As one possible implementation, it also includes a power supply contactor for the device under test and a power meter. The power supply contactor is used to control the power supply of the heat pump water heater under test; the power meter is used to record the power of the heat pump water heater under test.

[0010] As one possible implementation, it also includes a processing terminal; the processing terminal is communicatively connected to the pressure controller, flow controller, power meter, temperature acquisition device and PLC.

[0011] In one possible implementation, the pressure controller is communicatively connected to the pressure sensor and the pressure regulating valve; the pressure controller is used to adjust the opening degree of the pressure regulating valve according to the pressure value obtained by the pressure sensor.

[0012] In one possible implementation, the flow controller is communicatively connected to the flow meter and the flow regulating valve; the flow controller is used to adjust the opening of the flow regulating valve according to the flow value obtained by the flow meter.

[0013] In one possible implementation, the temperature acquisition device is communicatively connected to the inlet water temperature sensor, the outlet water temperature sensor, and the thermocouple; the temperature acquisition device is used to record the temperature value of the water at the inlet of the heat pump water heater under test, the temperature value of the water at the outlet of the heat pump water heater under test, and the temperature value of the water in the constant temperature water tank.

[0014] In one possible implementation, the PLC is communicatively connected to the power supply contactor of the machine under test, the pre-drain pneumatic valve, and the drain pneumatic valve.

[0015] The heat pump water heater water use mode test device provided by this utility model can automatically complete the measurement of heating temperature rise period, standby input power, water circulation stage and maximum available hot water volume stage data required by the EU water heater test standard EN16147. It is easy to operate, requires no human intervention, and provides accurate test data and reliable results. The device is flexible to assemble and disassemble and is easy to adjust. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a heat pump water heater water usage mode test device according to the present invention.

[0018] Figure 2 This is a schematic diagram of the communication connection of a heat pump water heater water use mode test device according to this utility model.

[0019] Figure reference numerals: 1 is a constant temperature water tank; 2 is a water pump; 3 is the first ball valve; 4 is the second ball valve; 5 is the first water distribution ball valve; 6 is a pressure regulating valve; 7 is a pressure sensor; 8 is an expansion tank; 9 is the fourth ball valve; 10 is an inlet water temperature sensor; 11 is the heat pump water heater under test; 12 is an outlet water temperature sensor; 13 is the third ball valve; 14 is a flow regulating valve; 15 is a drain pneumatic valve; 16 is a flow meter; 17 is a pre-drain pneumatic water distribution valve; 18 is a section of piping between the first ball valve and the first water distribution ball valve. 19 is a section of piping between the pressure regulating valve and the fourth ball valve; 20 is a section of piping between the pressure sensor and the second ball valve; 21 is a section of piping between the pre-drain pneumatic water distribution valve and the inlet of the second ball valve; 22 is a section of piping between the third ball valve and the flow regulating valve; 23 is a thermocouple; 24 is the power supply contactor for the tested machine; 100 is the processing terminal; 110 is the pressure controller; 120 is the flow controller; 130 is the power meter; 140 is the temperature acquisition device; 150 is the PLC. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be described in more detail below with reference to the accompanying drawings.

[0021] It should be noted that, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The described embodiments are some, but not all, embodiments of this utility model. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0023] The following is for reference. Figure 1 , Figure 2 This invention provides a detailed description of an embodiment of a heat pump water heater water usage mode test device disclosed in this utility model.

[0024] A heat pump water heater water usage mode test device includes a constant temperature water tank 1. The outlet of the constant temperature water tank 1 is connected to the inlet of a water pump 2 via a pipeline. The outlet of the water pump 2 is connected to a first ball valve 3. The first ball valve 3 is connected to a second ball valve 4 via a pipeline. A first water distribution ball valve 5, a pressure regulating valve 6, and a pressure sensor 7 are installed on the pipeline between the first ball valve 3 and the second ball valve 4. The first water distribution ball valve 5 is connected to an expansion tank 8. The pressure regulating valve 6 is connected to a fourth ball valve 9 via a pipeline and then to the inlet of the constant temperature water tank 1. The second ball valve 4 is connected to a pipeline equipped with an inlet water temperature sensor 10. The inlet of the heat pump water heater 11 under test is connected to the outlet of the heat pump water heater 11 under test. The outlet of the heat pump water heater 11 under test is connected to the third ball valve 13 through a pipeline equipped with an outlet water temperature sensor 12. The third ball valve 13 is connected to the flow regulating valve 14 through a pipeline. The flow regulating valve 14 is connected to the drain pneumatic valve 15 through a pipeline. The drain pneumatic valve 15 discharges water through a pipeline equipped with a flow meter 16. A pre-drain pneumatic water distribution valve 17 is installed on the pipeline at the inlet of the second ball valve 4. The pre-drain pneumatic water distribution valve 17 is connected to the pipeline between the flow regulating valve 14 and the drain pneumatic valve 15 through a pipeline.

[0025] This utility model of a heat pump water heater water usage mode test device provides the hardware foundation for realizing functions such as power-on of automated control equipment, constant water pressure control, constant water flow control, timed and quantitative water discharge control, power consumption measurement of the tested machine, and real-time acquisition and analysis of test data.

[0026] In this invention, the following sections of pipe are flexible: section 18 between the first ball valve 3 and the first water distribution ball valve 5; section 19 between the pressure regulating valve 6 and the fourth ball valve 4; section 20 between the pressure sensor 7 and the second ball valve 4; section 21 between the pre-drain pneumatic water distribution valve 17 and the pipe at the inlet of the second ball valve 4; and section 22 between the third ball valve 13 and the flow regulating valve 14. By installing flexible pipes between these sections, it is convenient to move the relevant valves and sensors, and the arrangement of pipes and related equipment can be based on the space of the test chamber. Furthermore, the flexible nature of these sections allows for easy disassembly of the heat pump water heater water mode test device, facilitating installation and relocation.

[0027] In this utility model heat pump water heater water use mode test device, a thermocouple is installed in the constant temperature water tank 1, which has the function of water temperature regulation and maintenance, and can meet the requirements of the standard for the inlet water temperature of the tested machine, and is used to heat and keep the water in the constant temperature water tank 1.

[0028] The heat pump water heater water use mode test device of this utility model also includes a power supply contactor 24 for the tested machine and a power meter 130. The power supply contactor 24 is used to control the power supply of the tested heat pump water heater; the power meter 130 is used to record the power of the tested heat pump water heater.

[0029] The heat pump water heater water use mode test device of this utility model also includes a processing terminal 100; the processing terminal 100 is communicatively connected to a pressure controller 110, a flow controller 120, a power meter 130, a temperature acquisition device 140 and a PLC 150.

[0030] The pressure controller 110 is communicatively connected to the pressure sensor 7 and the pressure regulating valve 6. The pressure controller 110 automatically adjusts the opening of the pressure regulating valve 6 based on the pressure value obtained from the pressure sensor 7 and the set value, thereby achieving constant pressure within the pipeline. For example, the processing terminal transmits the required pressure to the pressure controller. The pressure controller collects the pressure value through the pressure sensor and uses a PID algorithm to precisely control the opening of the pressure regulating valve in real time. Combined with the expansion tank installed on the pipeline, this achieves a constant pressure.

[0031] The flow controller 120 is communicatively connected to the flow meter 16 and the flow regulating valve 14. The flow controller automatically adjusts the opening of the flow regulating valve 14 based on the flow rate value obtained by the flow meter 16 and a set value, thereby achieving a constant flow rate in the pipeline. For example, the processing terminal transmits the required water flow rate to the flow controller. The flow controller collects the real-time flow rate value through the flow meter and uses a PID algorithm to precisely control the opening of the flow regulating valve in real time, ensuring a constant flow rate.

[0032] The temperature acquisition unit 140 is communicatively connected to the inlet water temperature sensor 10, the outlet water temperature sensor 12, and the thermocouple 23. The temperature acquisition unit 140 is used to record the temperature value of the inlet water of the heat pump water heater under test, the temperature value of the outlet water of the heat pump water heater under test, and the temperature value of the water in the constant temperature water tank.

[0033] In this utility model heat pump water heater water use mode test device, PLC150 is communicatively connected to the power supply contactor 24 of the tested machine, the pre-drain pneumatic valve 17, and the drain pneumatic valve 15.

[0034] Test Principle: The processing terminal records the electrical parameters of the tested machine in real time, as well as the inlet and outlet water temperatures, maintaining constant water pressure. According to the water release plan, upon reaching the designated time, the processing terminal first opens the preventative water valve and the outlet valve, sending the required water flow to the flow controller to release the water stored in the pipeline, ensuring the inlet water temperature matches the constant temperature water tank. After a certain release time, formal water release begins. At this time, the flow meter starts accumulating the flow and feeds back the real-time measured data to the flow controller. Once the designated flow rate is reached, the release ends. This cycle repeats until all test plans are completed. The processing terminal then synthesizes the test plans, generates a test report, and the test concludes.

[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A water mode test device for a heat pump water heater, characterized by, The system includes a constant-temperature water tank. The outlet of the constant-temperature water tank is connected to the inlet of a water pump via a pipeline. The outlet of the water pump is connected to a first ball valve. The first ball valve is connected to a second ball valve via a pipeline. A first water-dividing ball valve, a pressure regulating valve, and a pressure sensor are installed on the pipeline between the first and second ball valves. The first water-dividing ball valve is connected to an expansion tank. The pressure regulating valve is connected to a fourth ball valve via a pipeline and then to the inlet of the constant-temperature water tank. The second ball valve is connected to a system equipped with an inlet water temperature sensor via a pipeline. The inlet of the heat pump water heater under test is connected to the outlet of the heat pump water heater through a pipeline equipped with an outlet water temperature sensor and a third ball valve. The third ball valve is connected to a flow regulating valve through a pipeline, and the flow regulating valve is connected to a drain pneumatic valve through a pipeline. The drain pneumatic valve discharges water through a pipeline equipped with a flow meter. A pre-drain pneumatic water distribution valve is installed on the pipeline at the inlet of the second ball valve. The pre-drain pneumatic water distribution valve is connected to the pipeline between the flow regulating valve and the drain pneumatic valve through a pipeline.

2. The water mode test device for a heat pump water heater according to claim 1, characterized by, The pipeline between the first ball valve and the first water distribution ball valve, the pipeline between the pressure regulating valve and the fourth ball valve, the pipeline between the pressure sensor and the second ball valve, the pipeline between the pre-drain pneumatic water distribution valve and the pipeline at the inlet of the second ball valve, and the pipeline between the third ball valve and the flow regulating valve are flexible hoses.

3. The water mode test device for a heat pump water heater according to claim 1, characterized by, Thermocouples are installed in the constant temperature water tank.

4. The water mode test device for a heat pump water heater according to claim 3, characterized by, It also includes a power supply contactor for the tested machine and a power meter. The power supply contactor is used to control the power supply of the tested heat pump water heater; the power meter is used to record the power of the tested heat pump water heater.

5. The water mode test device for a heat pump water heater according to claim 4, characterized by, It also includes a processing terminal; the processing terminal is communicatively connected to the pressure controller, flow controller, power meter, temperature acquisition device and PLC.

6. The water mode test device for a heat pump water heater according to claim 5, characterized by, The pressure controller is communicatively connected to the pressure sensor and the pressure regulating valve; the pressure controller is used to adjust the opening degree of the pressure regulating valve according to the pressure value obtained by the pressure sensor.

7. The water mode test device for a heat pump water heater according to claim 5, wherein The flow controller is communicatively connected to the flow meter and the flow regulating valve; the flow controller is used to adjust the opening degree of the flow regulating valve according to the flow value obtained by the flow meter.

8. The water mode test device for a heat pump water heater according to claim 5, characterized by, The temperature acquisition device is communicatively connected to the inlet water temperature sensor, the outlet water temperature sensor, and the thermocouple; the temperature acquisition device is used to record the temperature value of the water at the inlet of the heat pump water heater under test, the temperature value of the water at the outlet of the heat pump water heater under test, and the temperature value of the water in the constant temperature water tank.

9. The water mode test device for a heat pump water heater according to claim 5, wherein The PLC is communicatively connected to the power supply contactor of the machine under test, the pre-drain pneumatic valve, and the drain pneumatic valve.

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