Air conditioning device for standard gas water heater

Abstract

An air conditioning device for a standard gas water heater belongs to the technical field of air conditioning and comprises a centrifugal fan, a combustion chamber air duct, a heat exchange air duct, an exhaust fume collecting hood air duct and an exhaust pipe which are sequentially connected. The air volume and the air pressure of air circulation in the combustion chamber can be adjusted through various adjusting schemes, so that the temperature of the inner cavity of the combustion chamber is kept stable, the working stability of the standard gas water heater is guaranteed, and the situation that the load of the standard gas water heater is decreased and increased in a gradient mode due to temperature rise of the inner cavity of the combustion chamber is avoided. In addition, the heat dissipation effect of the inner cavity of the combustion chamber is improved in an air diversion mode, the heat stability is improved, meanwhile, heat generated by combustion of fuel gas in the combustion chamber is directly transmitted into the heat exchanger, heat loss caused by air holes in the first air channel is avoided, and therefore the combustion efficiency of the combustion chamber is not affected.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioning technology, specifically relating to an air conditioning device for a standard gas water heater. Background Technology

[0002] In order to test various indicators of gas water heaters, testing agencies will use the corresponding testing equipment to test the gas water heaters and issue corresponding test results, which can reflect the performance of the gas water heaters.

[0003] To ensure the accuracy of the test results, the testing equipment needs to be measured and calibrated. This requires the use of a standard gas water heater. For example, patent application CN120232159A discloses a standard gas water heater comprising a casing, burner assembly, heat exchanger assembly, gas control system assembly, fan assembly, fume hood assembly, water pump system assembly, water outlet assembly, and main controller assembly. All components are installed within the casing. The standard gas water heater achieves stable heat load output by independently controlling variables and implementing stepped adjustment of these variables. The data obtained by the testing device is only affected by a single variable, resulting in objective and accurate test results. This allows for a precise assessment of the accuracy and testing capability of the testing device, making the variable control adjustment of the standard gas water heater more stable and reliable.

[0004] Because the accuracy of testing equipment using standard gas water heaters requires several hours of continuous operation to obtain measurement results before calibration, the continuous combustion within the combustion chamber causes the burner's internal temperature to rise. Traditional fan systems struggle to dissipate this heat effectively, leading to heat buildup inside the water heater and affecting its operational stability, thus impacting the accuracy of testing equipment. To ensure a more stable load output and a more constant inlet and outlet water temperature difference for standard gas water heaters, it is necessary to improve the existing fan system structure and layout. This requires employing an air conditioning device that enhances convection to regulate the airflow in the standard gas water heater, stabilizing the internal temperature during continuous combustion and enabling the standard gas water heater to maintain a stable output. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides an air conditioning device for a standard gas water heater.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] An air conditioning device for a standard gas water heater includes a centrifugal fan, a combustion chamber duct, a heat exchange duct, a smoke hood duct, and an exhaust pipe connected in sequence. The air inlet of the centrifugal fan is equipped with an opening adjustment device for controlling the opening degree of the air inlet.

[0008] The opening adjustment device includes a servo motor with mechanical brake, a synchronous transmission mechanism, several adjustment blades, and a mounting ring. The servo motor is connected to the synchronous transmission mechanism, which has several output shafts for connecting the adjustment blades. The output shafts rotate synchronously based on the operation of the servo motor. The inner side of the adjustment blade is connected to the output shaft, and the outer side of the adjustment blade is rotatably connected to the inner side of the mounting ring. The mounting ring is fixedly installed inside the air inlet.

[0009] The combustion chamber air duct includes a combustion chamber base plate, a combustion chamber outer shell, a combustion chamber inner shell, and several combustion chamber connecting plates. The combustion chamber outer shell is fixed to the combustion chamber base plate. The combustion chamber inner shell is located inside the combustion chamber outer shell and forms a first air passage with the combustion chamber inner shell spaced apart. The several combustion chamber connecting plates are respectively spaced within the first air passage and divide the first air passage into several first ventilation channels running from bottom to top. The inner side of the combustion chamber connecting plate is connected to the outer side of the combustion chamber inner shell, and the outer side of the combustion chamber connecting plate is connected to the inner side of the combustion chamber outer shell. The combustion chamber inner shell has a second air passage running from bottom to top. The combustion chamber base plate has a vent running from bottom to top. The outlet of the centrifugal fan is connected to the vent, and the vent is connected to the first air passage and the second air passage.

[0010] In this invention, the heat exchange duct includes a heat exchange outer shell, a heat exchange inner shell, and several heat exchange connecting plates. The heat exchange inner shell is located inside the heat exchange outer shell and forms a third air channel with the heat exchange outer shell at intervals. The several heat exchange connecting plates are respectively arranged at intervals in the third air channel and divide the third air channel into several second ventilation channels that run from bottom to top. The inner side of the heat exchange connecting plate is connected to the outer side of the heat exchange inner shell, and the outer side of the heat exchange connecting plate is connected to the inner side of the heat exchange outer shell. The heat exchange inner shell is provided with a fourth air channel that runs from bottom to top. The first air channel is correspondingly connected to the third air channel, and the second air channel is correspondingly connected to the fourth air channel.

[0011] In this invention, the connection surfaces between the opening adjustment device and the centrifugal fan, between the centrifugal fan and the combustion chamber duct, between the combustion chamber duct and the heat exchange duct, and between the heat exchange duct and the smoke hood duct are all coated with sealant for sealing.

[0012] In this utility model, the centrifugal fan includes a fan housing and a housing cover plate. The back of the fan housing is provided with a fixing surface for fitting and installing with the housing cover plate. The front of the housing cover plate is provided with a forward-protruding closing protrusion, and the back of the fan housing is provided with a forward-recessed closing recess. The closing recess is coated with sealant. The housing cover plate and the fan housing are connected by the fitting of the closing protrusion and the closing recess and sealed with sealant. The front of the housing cover plate is fixedly connected to the fixing surface by screws.

[0013] In this utility model, the air outlet of the centrifugal fan is located on the fan housing, and a closed connecting frame is provided on the outer periphery of the air outlet. The inner side of the connecting frame is provided with a stepped hole that matches the upper end of the housing cover plate. The upper end of the housing cover plate is inserted into the stepped hole for end clamping and positioning.

[0014] In this utility model, the synchronous transmission mechanism includes a turntable and several gears. The outer edge of the turntable is provided with multiple mating holes that can be adapted to the gears for transmission. Several gears are evenly distributed on the outer edge of the turntable and are adapted to the mating holes. The rotation axis of the turntable is perpendicular to the rotation axis of the gears. Each gear is connected to an output shaft, and each output shaft is connected to an adjusting blade.

[0015] The beneficial effects of this utility model are: the air conditioning device of this utility model can adjust the air volume and air pressure of the combustion chamber through a variety of adjustment schemes, thereby keeping the temperature of the combustion chamber cavity stable, ensuring the stability of the standard gas water heater's operation, and avoiding the standard gas water heater from experiencing a decrease in load due to the increase in the temperature of the combustion chamber cavity.

[0016] It also improves the heat dissipation effect of the combustion chamber by diverting air, thereby improving thermal stability. At the same time, the heat from the combustion of gas in the combustion chamber is directly transferred to the heat exchanger, and there is no heat loss due to air voids in the first air passage. Therefore, it does not affect the combustion efficiency of the combustion chamber. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the air conditioning device in this embodiment;

[0018] Figure 2 This is a schematic diagram of the opening adjustment device in this embodiment;

[0019] Figure 3 This is a top view of the combustion chamber air duct in this embodiment;

[0020] Figure 4 for Figure 3 Sectional view of mid-section AA;

[0021] Figure 5 for Figure 3 Sectional view of mid-section BB;

[0022] Figure 6 This is a top view of the heat exchange duct in this embodiment;

[0023] Figure 7 This is a schematic diagram of the centrifugal fan in this embodiment;

[0024] Figure 8 This is an exploded view of the centrifugal fan in this embodiment;

[0025] Figure 9 This is a schematic diagram of the internal structure of the opening adjustment device in this embodiment;

[0026] Figure 10 This is a schematic diagram of the internal structure of the synchronous transmission mechanism in this embodiment. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0028] like Figures 1 to 10As shown, this embodiment discloses an air conditioning device for a standard gas water heater, including a centrifugal fan 1, a combustion chamber duct 2, a heat exchange duct 3, a smoke collection hood duct 4, and an exhaust pipe 5 connected in sequence. The air inlet of the centrifugal fan 1 is equipped with an opening adjustment device 6 for controlling the opening degree of the air inlet. The opening adjustment device 6 includes a servo motor 61 with mechanical braking, a synchronous transmission mechanism 62, several adjusting blades 63, and a mounting ring 64. The servo motor 61 is connected to the synchronous transmission mechanism 62. The synchronous transmission mechanism 62 is provided with several output shafts 621 for connecting the adjusting blades 63. The output shafts 621 rotate synchronously based on the operation of the servo motor 61. The inner side of the adjusting blades 63 is connected to the output shafts 621, and the outer side of the adjusting blades 63 is rotatably connected to the inner side of the mounting ring 64. The mounting ring 64 is fixedly installed inside the air inlet. When a standard gas water heater is operating continuously and the temperature inside the combustion chamber is high, the opening of the air inlet can be increased by controlling the opening adjustment device 6, thereby increasing the airflow inside the combustion chamber and preventing overheating. Alternatively, if a constant air pressure is required for accurate measurements, the opening of the air inlet can be increased by controlling the opening adjustment device 6, while simultaneously increasing the speed of the centrifugal fan 1. This increases the airflow inside the combustion chamber while maintaining a constant air pressure. Conversely, if a constant airflow is required for measurement, the opening of the air inlet can be decreased by controlling the opening adjustment device 6, while simultaneously increasing the speed of the centrifugal fan 1. This increases the air pressure inside the combustion chamber while maintaining a constant airflow, thereby stabilizing the temperature inside the combustion chamber by accelerating airflow. Therefore, the air conditioning device in this embodiment can adjust the air volume and air pressure of the combustion chamber through various adjustment schemes, thereby keeping the temperature of the combustion chamber cavity stable, ensuring the stability of the standard gas water heater's operation, and avoiding the standard gas water heater from experiencing a significant increase in load drop due to the increased temperature of the combustion chamber cavity, which would affect the accuracy of the measurement.

[0029] Furthermore, to improve the thermal stability of the combustion chamber, the combustion chamber air duct 2 includes a combustion chamber bottom plate 21, a combustion chamber outer shell 22, a combustion chamber inner shell 23, and several combustion chamber connecting plates 24. The combustion chamber outer shell 22 is fixed to the combustion chamber bottom plate 21. The combustion chamber inner shell 23 is located inside the combustion chamber outer shell 22 and forms a first air passage 25 with the combustion chamber inner shell 23 at intervals. Several combustion chamber connecting plates 24 are respectively arranged at intervals within the first air passage 25 and divide the first air passage 25 into several first ventilation channels running from bottom to top. The inner side of the combustion chamber connecting plate 24 is connected to the outer side of the combustion chamber inner shell 23, and the outer side of the combustion chamber connecting plate 24 is connected to the inner side of the combustion chamber outer shell 22. The combustion chamber inner shell 23 is provided with a second air passage 26 running from bottom to top. The combustion chamber bottom plate... The centrifugal fan 1 is provided with a ventilation opening 27 that runs from bottom to top. The air outlet of the centrifugal fan 1 is connected to the ventilation opening 27. The ventilation opening 27 is connected to the first air channel 25 and the second air channel 26. When the centrifugal fan 1 is working, air enters the combustion chamber air duct 2 from the ventilation opening 27 and flows into the first air channel 25 and the second air channel 26 respectively. The air flowing in the first air channel 25 mainly plays a role in heat dissipation, while the air in the second air channel 26 mainly participates in the combustion of the gas. By splitting the air, the heat dissipation effect of the combustion chamber cavity is improved, and the thermal stability is improved. At the same time, the heat of the gas combustion in the combustion chamber is directly transferred to the heat exchanger. There is no heat loss due to the air flow in the first air channel 25, so the combustion efficiency of the combustion chamber is not affected.

[0030] Furthermore, the heat exchange duct 3 includes a heat exchange outer shell 31, a heat exchange inner shell 32, and several heat exchange connecting plates 33. The heat exchange inner shell 32 is located inside the heat exchange outer shell 31 and forms a third air passage 34 with the heat exchange outer shell 31 at intervals. The several heat exchange connecting plates 33 are respectively arranged at intervals in the third air passage 34 and divide the third air passage 34 into several second ventilation channels that run from bottom to top. The inner side of the heat exchange connecting plate 33 is connected to the outer side of the heat exchange inner shell 32, and the outer side of the heat exchange connecting plate 33 is connected to the inner side of the heat exchange outer shell 31. The heat exchange inner shell 32 is provided with a fourth air passage 35 that runs from bottom to top. The first air passage 25 is correspondingly connected to the third air passage 34, and the second air passage 26 is correspondingly connected to the fourth air passage 35. The second air passage 26 is provided with a space for installing a burner, and the fourth air passage 35 is provided with a space for installing a heat exchanger.

[0031] In this embodiment, the air flowing through the third air passage 34 and the fourth air passage 35 merges and flows into the smoke hood duct 4, and is finally discharged through the exhaust pipe 5.

[0032] In a preferred embodiment, the connection surfaces between the opening adjustment device 6 and the centrifugal fan 1, between the centrifugal fan 1 and the combustion chamber air duct 2, between the combustion chamber air duct 2 and the heat exchange air duct 3, and between the heat exchange air duct 3 and the smoke hood air duct 4 are all coated with sealant for sealing.

[0033] In a preferred embodiment, the centrifugal fan 1 includes a fan housing 11 and a housing cover 12. The back of the fan housing 11 is provided with a fixing surface 111 for fitting and mounting with the housing cover 12. The front of the housing cover 12 is provided with a forward-protruding closed protrusion 121, and the back of the fan housing 11 is provided with a forward-recessed closed recess 112. The closed recess 112 is coated with sealant. The housing cover 12 and the fan housing 11 are connected by the fitting of the closed protrusion 121 and the closed recess 112 and sealed with sealant. The front of the housing cover 12 is fitted to the fixing surface 111 and fixedly connected by screws. Furthermore, the air outlet of the centrifugal fan 1 is located on the fan housing 11, and a closed connecting frame 113 is provided on the outer periphery of the air outlet. The inner side of the connecting frame 113 is provided with a stepped hole 114 that matches the upper end of the housing cover plate 12. The upper end of the housing cover plate 12 is inserted into the stepped hole 114 for end clamping and positioning, thereby improving the sealing performance of the connection between the fan housing 11 and the housing cover plate 12. At the same time, both the fan housing 11 and the housing cover plate 12 include arc-shaped and square-shaped parts. When assembling the fan housing 11 and the housing cover plate 12, the upper end of the housing cover plate 12 is first inserted into the stepped hole 114, and then the assembly and positioning are achieved by the matching of the corresponding arc-shaped parts of the fan housing 11 and the housing cover plate 12.

[0034] In a preferred embodiment, the synchronous transmission mechanism 62 includes a turntable 622 and a plurality of gears 623. The outer edge of the turntable 622 is provided with a plurality of mating holes 624 that can be adapted to the gears 623 for transmission. The plurality of gears 623 are evenly distributed on the outer edge of the turntable 622 and are adapted to the mating holes 624. The rotation axis of the turntable 622 is perpendicular to the rotation axis of the gears 623. Each gear 623 is connected to an output shaft 621, and each output shaft 621 is connected to an adjusting blade 63. The servo motor 61 is connected to the turntable 622 and drives the turntable 622 to rotate. The turntable 622 drives the plurality of gears 623 to rotate synchronously, thereby driving the adjusting blades 63 to rotate synchronously through the output shafts 621, thereby realizing the control of the opening size of the air inlet of the centrifugal fan 1.

[0035] The above description is only a preferred embodiment of the present utility model. Any technical solution that achieves the purpose of the present utility model by essentially the same means shall fall within the protection scope of the present utility model.

Claims

1. An air conditioning device for a standard gas water heater, characterized in that: It includes a centrifugal fan (1), a combustion chamber duct (2), a heat exchange duct (3), a smoke hood duct (4), and an exhaust pipe (5) connected in sequence. The centrifugal fan (1) is equipped with an opening adjustment device (6) for controlling the opening size of the air inlet. The opening adjustment device (6) includes a servo motor (61) with mechanical brake, a synchronous transmission mechanism (62), several adjustment blades (63) and a mounting ring (64). The servo motor (61) is connected to the synchronous transmission mechanism (62). The synchronous transmission mechanism (62) is provided with several output shafts (621) for connecting the adjustment blades (63). The output shafts (621) rotate synchronously based on the operation of the servo motor (61). The inner side of the adjustment blade (63) is connected to the output shaft (621). The outer side of the adjustment blade (63) is rotatably connected to the inner side of the mounting ring (64). The mounting ring (64) is fixedly installed inside the air inlet. The combustion chamber air duct (2) includes a combustion chamber bottom plate (21), a combustion chamber outer shell (22), a combustion chamber inner shell (23), and several combustion chamber connecting plates (24). The combustion chamber outer shell (22) is fixed on the combustion chamber bottom plate (21). The combustion chamber inner shell (23) is located inside the combustion chamber outer shell (22) and forms a first air passage (25) with the combustion chamber inner shell (23) spaced apart. Several combustion chamber connecting plates (24) are respectively spaced in the first air passage (25) and divide the first air passage (25) into several through-flow lines from bottom to top. The first ventilation channel; the inner side of the combustion chamber connecting plate (24) is connected to the outer side of the combustion chamber inner shell (23), and the outer side of the combustion chamber connecting plate (24) is connected to the inner side of the combustion chamber outer shell (22); the combustion chamber inner shell (23) is provided with a second air channel (26) that runs from bottom to top; the combustion chamber bottom plate (21) is provided with a ventilation port (27) that runs from bottom to top, the air outlet of the centrifugal fan (1) is connected to the ventilation port (27), and the ventilation port (27) is connected to the first air channel (25) and the second air channel (26).

2. An air conditioning device for a standard gas water heater according to claim 1, characterized in that: The heat exchange duct (3) includes a heat exchange outer shell (31), a heat exchange inner shell (32), and several heat exchange connecting plates (33). The heat exchange inner shell (32) is located inside the heat exchange outer shell (31) and forms a third air channel (34) with the heat exchange outer shell (31) at intervals. Several heat exchange connecting plates (33) are respectively arranged at intervals in the third air channel (34) and divide the third air channel (34) into several second ventilation channels that run from bottom to top. The inner side of the heat exchange connecting plate (33) is connected to the outer side of the heat exchange inner shell (32), and the outer side of the heat exchange connecting plate (33) is connected to the inner side of the heat exchange outer shell (31). The heat exchange inner shell (32) is provided with a fourth air channel (35) that runs from bottom to top. The first air channel (25) is connected to the third air channel (34), and the second air channel (26) is connected to the fourth air channel (35).

3. An air conditioning device for a standard gas water heater according to claim 1, characterized in that: The connection surfaces between the opening adjustment device (6) and the centrifugal fan (1), between the centrifugal fan (1) and the combustion chamber duct (2), between the combustion chamber duct (2) and the heat exchange duct (3), and between the heat exchange duct (3) and the smoke hood duct (4) are all coated with sealant for sealing.

4. An air conditioning device for a standard gas water heater according to claim 1, characterized in that: The centrifugal fan (1) includes a fan housing (11) and a housing cover plate (12). The back of the fan housing (11) is provided with a fixing surface (111) for fitting and installing with the housing cover plate (12). The front of the housing cover plate (12) is provided with a forward-protruding closed protrusion (121). The back of the fan housing (11) is provided with a forward-recessed closed recess (112). The closed recess (112) is coated with sealant. The housing cover plate (12) and the fan housing (11) are fitted together based on the matching of the closed protrusion (121) and the closed recess (112) and sealed with sealant. The front of the housing cover plate (12) and the fixing surface (111) are fitted together and fixedly connected by screws.

5. An air conditioning device for a standard gas water heater according to claim 1, characterized in that: The air outlet of the centrifugal fan (1) is located on the fan housing (11). A closed connecting frame (113) is provided on the outer periphery of the air outlet. The inner side of the connecting frame (113) is provided with a stepped hole (114) that is adapted to the upper end of the housing cover plate (12). The upper end of the housing cover plate (12) is inserted into the stepped hole (114) for end clamping and positioning.

6. An air conditioning device for a standard gas water heater according to claim 1, characterized in that: The synchronous transmission mechanism (62) includes a turntable (622) and a plurality of gears (623). The outer edge of the turntable (622) is provided with a plurality of mating holes (624) that can be adapted to the gears (623) for transmission. The plurality of gears (623) are evenly distributed on the outer edge of the turntable (622) and adapted to the mating holes (624). The rotation axis of the turntable (622) is perpendicular to the rotation axis of the gears (623). Each gear (623) is connected to an output shaft (621), and each output shaft (621) is connected to an adjusting blade (63).

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