Domestic gas water heater windy state test system

Abstract

The utility model discloses a domestic gas water heater windy state test system, which relates to the technical field of gas water heater test, and comprises a support, the upper end of the support is fixedly connected with a shell, the front end of the shell is fixedly connected with a contraction flow guide section through a bolt, the front end of the contraction flow guide section is fixedly connected with a rectification section through a bolt, and the rectification section is fixedly connected with the shell through a bolt. The front end of the rectification section is fixedly connected with a first connector through a bolt, the front end of the first connector is fixedly connected with a second connector through a bolt, and the front end of the second connector is fixedly connected with a third connector through a bolt. The angle of the air outlet can be adjusted to different directions, the variable frequency motor controls output through the variable frequency adjusting mechanism, adjustment of different air speeds can be achieved, and various environmental conditions can be simulated through various combination modes of different air speeds and angles.

Description

Technical Field

[0001] This utility model relates to the field of gas water heater testing technology, specifically to a testing system for the airflow state of a household gas water heater. Background Technology

[0002] A gas water heater, also known as a gas water boiler, is a gas appliance that uses gas as fuel and heats water by transferring heat to cold water flowing through a heat exchanger. During use, gas water heaters produce combustion exhaust gases, which must be discharged outdoors through exhaust pipes. To ensure that exhaust gases do not flow back into the room due to wind interference, thus avoiding safety issues such as carbon monoxide poisoning, wind conditions are tested during the production process of gas water heaters.

[0003] Current domestic gas water heater ventilation testing systems generate relatively fixed wind directions. However, in reality, the direction and speed of natural wind often change. Fixed-direction tests may not reflect the true conditions in these environments, resulting in inaccurate performance evaluation of the water heater's exhaust system. Therefore, a domestic gas water heater ventilation testing system is proposed to address the aforementioned problems. Utility Model Content

[0004] To address the aforementioned technical problems, a testing system for the wind conditions of a household gas water heater is provided. This technical solution solves the problem mentioned in the background that the wind direction generated by the current testing system for the wind conditions of a household gas water heater is relatively fixed. In reality, the direction and speed of natural wind often change, and a fixed wind direction test may not be able to reflect the real situation in these environments, thus making the performance evaluation of the water heater exhaust system inaccurate.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A system for testing the airflow status of a household gas water heater includes a support, a housing fixedly connected to the upper end of the support, a converging guide section fixedly connected to the front end of the housing by bolts, a rectifier section fixedly connected to the front end of the converging guide section by bolts, a first connector fixedly connected to the front end of the rectifier section by bolts, a second connector fixedly connected to the front end of the first connector by bolts, a third connector fixedly connected to the front end of the second connector by bolts, a plurality of evenly distributed guide vanes fixedly connected inside the housing, a fixing seat fixedly connected to the inner side of the guide vanes, a variable frequency motor fixedly installed on the inner side of the fixing seat, and an impeller fixedly connected to the output end of the variable frequency motor by a coupling.

[0007] Preferably, the tilt angles of the first connector, the second connector, and the third connector are all 15°.

[0008] Preferably, the rear end of the mounting base is fixedly connected to a first fairing.

[0009] Preferably, a second fairing is fixedly connected to the inside of the housing on the side away from the first fairing.

[0010] Preferably, the length of the rectifier section is 0.5 times its inlet diameter.

[0011] Preferably, the rectifier section is internally provided with a rectifier grid, a damping mesh, and a static flow pipe. The static flow pipe is located on the side close to the contraction guide section, the rectifier grid is located on the side away from the contraction guide section, and the damping mesh is located between the rectifier grid and the static flow pipe. The rectifier grid adopts any one of a square interface, a hexagonal interface, and a circular interface honeycomb structure.

[0012] Preferably, the diameter of the constriction guide section decreases sequentially on the side away from the shell, forming a cone shape.

[0013] The advantages of this utility model compared with the prior art are:

[0014] This solution proposes a testing system for the airflow state of a household gas water heater. By rotating the first, second, and third connectors, the angle of the air outlet can be adjusted to different directions. The variable frequency motor is controlled by a variable frequency adjustment mechanism, and its speed is adjustable. With the use of an impeller, different wind speeds can be adjusted to simulate various natural wind conditions, from calm to strong winds. Through various combinations of different wind speeds and angles, various environmental conditions can be simulated, thus more realistically reflecting the actual working environment of the exhaust system of the household gas water heater and making the performance evaluation of the water heater exhaust system more accurate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the shell structure in this utility model.

[0017] The numbers on the map are:

[0018] 1. Support; 2. Housing; 3. Contraction guide section; 4. Rectifying section; 5. First connector; 6. Second connector; 7. Third connector; 8. Guide vane; 9. Fixing base; 10. Variable frequency motor; 11. Impeller; 12. First rectifier; 13. Second rectifier. Detailed Implementation

[0019] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0020] Reference Figure 1-Figure 2 As shown, a wind state testing system for a household gas water heater includes a support 1. A housing 2 is fixedly connected to the upper end of the support 1. A converging guide section 3 is fixedly connected to the front end of the housing 2 by bolts. A rectifier section 4 is fixedly connected to the front end of the converging guide section 3 by bolts. A first connector 5 is fixedly connected to the front end of the rectifier section 4 by bolts. A second connector 6 is fixedly connected to the front end of the first connector 5 by bolts. A third connector 7 is fixedly connected to the front end of the second connector 6 by bolts. Several evenly distributed guide vanes 8 are fixedly connected inside the housing 2. A fixing seat 9 is fixedly connected to the inner side of the guide vanes 8. A variable frequency motor 10 is fixedly installed inside the fixing seat 9. An impeller 11 is fixedly connected to the output end of the variable frequency motor 10 through a coupling.

[0021] Furthermore, the variable frequency motor 10 drives the impeller 11 to disturb the airflow, thereby increasing the air pressure and enabling the output of airflow with a certain speed. The variable frequency motor 10 is electrically connected to a variable frequency adjustment mechanism. By changing the speed of the variable frequency motor 10 through the variable frequency adjustment mechanism, the output wind speed can be controlled, with the wind speed range being 1-15 m / s.

[0022] Furthermore, a first shroud 12 is fixedly connected to the rear end of the mounting base 9, and a second shroud 13 is fixedly connected to the side of the housing 2 away from the first shroud 12. The first shroud 12 is used to guide the airflow and reduce airflow fluctuations, making the airflow entering the housing 2 more stable.

[0023] Furthermore, the variable frequency motor 10 drives the impeller 11 to increase the air pressure by disturbing the airflow, and outputs an airflow with a certain speed. Since there are distance loss and local loss in the airflow in the pipeline, its effective wind speed is the actual wind speed after overcoming the distance loss and local loss. The second rectifier 13 is mainly to make the airflow smoothly transition from the impeller 11 to the pipeline. Since the area of ​​the impeller 11 is smaller than the area of ​​the pipeline, it is equivalent to the airflow entering the large pipeline from the small pipeline, so there is a local resistance loss. At the same time, the instability of the airflow field at the rear end of the impeller 11 and the inconsistency of the airflow velocity field cause resistance loss and dynamic pressure loss. The second rectifier 13 can improve the flow field and reduce resistance loss.

[0024] Furthermore, the diameter of the constriction guide section 3 on the side away from the shell 2 decreases sequentially to form a cone shape. Due to the presence of the variable frequency motor 10, the area of ​​the impeller 11 is smaller than the pipe area. Therefore, the closer to the fan, the greater the difference between the flow field at the center of the pipe and the flow field around it. The cone-shaped guide section can make the flow field relatively stable within the shortest possible pipe, thereby reducing costs and the floor space required.

[0025] Furthermore, the tilt angles of the first connector 5, the second connector 6, and the third connector 7 are all 15°. The first connector 5, the second connector 6, and the third connector 7 can be selectively installed. By sequentially installing the first connector 5, the second connector 6, and the third connector 7, air outlet angles of 15°, 30°, and 45° can be formed. By rotating the connectors, the angle of the air outlet can be adjusted to the horizontal left and right, and the vertical direction. Then, by connecting the air outlet pipe, combinations of air outlet pipes with different diameters and different air directions can be achieved. The configured air outlet pipe diameters are 600mm, 800mm, and 1000mm, respectively.

[0026] Furthermore, the length of the rectifier section 4 is 0.5 times its inlet diameter. This length helps the airflow gradually return to a more uniform state. The rectifier section 4 is equipped with a rectifier grid, a damping net, and a static flow duct. The static flow duct is located on the side closer to the converging guide section 3, and the rectifier grid is located on the side farther away from the converging guide section 3. The damping net is located between the rectifier grid and the static flow duct. The rectifier grid can be any one of a square interface, hexagonal interface, or circular interface honeycomb. Since large-scale vortices still exist in the airflow after passing through the guide section, a sufficiently long duct with a constant cross-section is used to improve the airflow quality in order to make the airflow more uniform. The static flow duct can reduce the turbulence and disturbance of the airflow, providing a relatively uniform airflow foundation for the subsequent rectifier grid and damping net. The damping net is used to further reduce high-frequency vibrations and turbulence in the airflow and stabilize the airflow. Finally, the rectifier grid is placed to guide the airflow and reduce large-scale vortices, making the airflow more uniform and stable.

[0027] Furthermore, during the testing, the gas water heater was installed on the central simulated wall. The simulated wall was mainly made of aluminum alloy profiles, with the central simulated wall measuring 1.8*1.8 meters. A flue pipe hole was reserved in the center, and three sets of flue pipe fixing flanges with diameters of 100mm, 80mm, and 60mm were configured. The bottom plate of the central hole can move left and right, and there are casters at the bottom for movement. The wall can be manually raised and lowered to adapt to different height requirements.

[0028] Working Principle: During use, the household gas water heater is installed on a simulated wall and connected to the air supply system through the flue hole on the wall, simulating the actual flue connection and airflow channel. Then, an air outlet pipe of the required diameter is installed at the air outlet of the rectifier section 4. Next, the variable frequency motor 10 is started, which drives the impeller 11 to rotate. The rotation of the impeller 11 disturbs and pressurizes the airflow, generating an airflow with a certain speed. The generated airflow is further stabilized by the constriction guide section 3 and the rectifier section 4 before being output and blown towards the flue, simulating the effect of natural wind on the flue. According to different test requirements, the tester can install the first connector 5, the second connector 6, and the third connector 7 between the rectifier section 4 and the air outlet pipe to form air outlet angles of 15°, 30°, and 45°. The speed of the variable frequency motor 10 can be adjusted by the variable frequency adjustment mechanism, thereby controlling the output wind speed. By using different wind speeds, different air outlet angles, and different diameter air outlet pipes in combination, different test environments can be created, simulating the natural wind in different environments, making the test results more accurate.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A system for testing the draft status of a household gas water heater, characterized in that, The device includes a support (1), a housing (2) is fixedly connected to the upper end of the support (1), a converging guide section (3) is fixedly connected to the front end of the housing (2) by bolts, a rectifier section (4) is fixedly connected to the front end of the converging guide section (3) by bolts, a first connector (5) is fixedly connected to the front end of the rectifier section (4) by bolts, a second connector (6) is fixedly connected to the front end of the first connector (5) by bolts, a third connector (7) is fixedly connected to the front end of the second connector (6) by bolts, a number of evenly distributed guide vanes (8) are fixedly connected inside the housing (2), a fixed seat (9) is fixedly connected to the inner side of the guide vanes (8), a variable frequency motor (10) is fixedly installed on the inner side of the fixed seat (9), and an impeller (11) is fixedly connected to the output end of the variable frequency motor (10) by a coupling.

2. The airflow testing system for a household gas water heater according to claim 1, characterized in that: The tilt angles of the first connector (5), the second connector (6) and the third connector (7) are all 15°.

3. The airflow testing system for a household gas water heater according to claim 1, characterized in that: The rear end of the fixed base (9) is fixedly connected to the first fairing (12).

4. The airflow testing system for a household gas water heater according to claim 1, characterized in that: The second fairing (13) is fixedly connected to the inside of the housing (2) on the side away from the first fairing (12).

5. The airflow testing system for a household gas water heater according to claim 1, characterized in that: The length of the rectifier section (4) is 0.5 times its inlet diameter.

6. The airflow testing system for a household gas water heater according to claim 1, characterized in that: The rectifier section (4) is internally provided with a rectifier grid, a damping net and a static flow pipe. The static flow pipe is located on the side close to the contraction guide section (3), the rectifier grid is located on the side away from the contraction guide section (3), and the damping net is located between the rectifier grid and the static flow pipe. The rectifier grid adopts any one of square interface, hexagonal and circular interface honeycomb.

7. The airflow testing system for a household gas water heater according to claim 1, characterized in that: The diameter of the contraction guide section (3) on the side away from the shell (2) decreases sequentially, forming a cone shape.

Images