Efficient fuel gas preheating module

Abstract

The utility model discloses an efficient fuel gas preheating module which comprises an outer shell, an inner shell, a preheating module, a fuel gas module and a controller, the preheating module comprises a preheating water tank, a water inlet control valve and a water tank valve, a fin plate is embedded in the preheating water tank, and an electric heating wire is embedded in the fin plate; the fuel gas module comprises a fuel gas control valve, a first heat exchange chamber, a second heat exchange chamber, a smoke storage chamber, a smoke exhaust chamber, a combustion chamber and a plurality of temperature sensors; the control unit comprises a controller, a display unit and keys; the gas control valve is connected to the combustion chamber through a gas pipeline, a first heat exchange chamber is arranged above the combustion chamber, a smoke storage chamber is arranged above the first heat exchange chamber, the smoke storage chamber is connected to a sucking pump through a gas pipeline, the output end of the sucking pump is connected to a second heat exchange chamber through a pipeline, and the top end of the second heat exchange chamber is connected with a smoke exhaust chamber; and a preheating water tank is arranged in the second heat exchange chamber. The module can control the water temperature more accurately, and the situation that water temperature fluctuation affects cleaning of the dish-washing machine is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of commercial dishwasher equipment, specifically relating to a gas-fired high-efficiency preheating module. Background Technology

[0002] Commercial dishwashers have strict water temperature requirements. Typically, the pre-wash stage is 35°C–45°C to initially remove food residue, the main wash stage is 55°C–65°C to thoroughly break down grease and stains, the rinsing stage is 70°C–85°C to kill bacteria and remove detergent residue, and the final disinfection stage must reach above 82°C and be maintained for at least 10 seconds to ensure hygiene and safety.

[0003] However, gas-fired dishwashers often experience frequent water temperature fluctuations in actual use due to issues such as unstable gas pressure, uneven heating efficiency, and insufficient precision in the temperature control system. This leads to a series of negative consequences. First, when the water temperature is too low, grease and food residue cannot be fully broken down, resulting in significantly reduced cleaning effectiveness and potentially leaving stains or oil films on the tableware. Conversely, excessively high water temperatures can damage tableware with poor heat resistance (such as plastic products) and may even cause the cleaning agent to become ineffective due to high temperatures, reducing its cleaning power. Second, during the rinsing and disinfection stages, if the water temperature cannot consistently reach the disinfection requirements of 70°C–85°C or higher, bacteria and microorganisms may not be effectively killed, thus affecting the hygiene and safety of the tableware and increasing food safety risks.

[0004] Furthermore, frequent water temperature fluctuations place additional strain on the dishwasher's heating elements, water pump, and piping system, accelerating equipment aging and shortening its lifespan. They also lead to wasted gas and water due to repeated heating or overheating, increasing operating costs. For users, unstable water temperatures may result in water stains or dirt remaining on dishes after washing, affecting the user experience and satisfaction.

[0005] Therefore, there is an urgent need for a dishwasher module that can solve the above problems. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a gas-fired high-efficiency preheating module. This utility model can more accurately control the water temperature and avoid water temperature fluctuations affecting the cleaning of commercial dishwashers.

[0007] The technical solution adopted by this utility model to solve its existing problems is:

[0008] A high-efficiency gas preheating module includes an outer shell, an inner shell, a preheating module, a gas module, and a controller. The preheating module includes a preheating water tank, an inlet control valve, and a water tank valve. The preheating water tank has embedded finned plates with embedded heating wires. Temperature sensors are also installed at the top and bottom of the preheating water tank. The gas module includes a gas control valve, a first heat exchange chamber, a second heat exchange chamber, a smoke storage chamber, a smoke exhaust chamber, a combustion chamber, and several temperature sensors. The control unit includes a controller, a display unit, and buttons. The control unit is electrically connected to the heating wires, the inlet control valve, and the water tank valve of the preheating module, as well as the gas control valve and temperature sensors of the gas module. The gas control valve is connected to the combustion chamber via a gas pipeline. The first heat exchange chamber is located above the combustion chamber, and the smoke storage chamber is located above the first heat exchange chamber. The smoke storage chamber is connected to a suction pump via a gas pipeline. The output end of the suction pump is connected to the second heat exchange chamber via a pipeline. The top of the second heat exchange chamber is connected to the smoke exhaust chamber. The preheating water tank is located inside the second heat exchange chamber.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] First, through the dual effects of electric heating and exhaust gas preheating, the water temperature is ensured to remain stable within the required range, avoiding water temperature instability caused by fluctuations in gas pressure or uneven heating efficiency, thereby improving the cleaning and disinfection effect and ensuring the hygiene and safety of tableware.

[0011] Secondly, the exhaust gas preheating module recovers the waste heat generated by gas combustion, reducing energy waste. At the same time, the electric heating system only supplements heat when necessary, reducing gas and electricity consumption and saving operating costs.

[0012] Furthermore, it can quickly raise the water temperature to the target temperature, shorten heating time, improve work efficiency, and meet high-intensity commercial needs. At the same time, the stable water temperature reduces the impact on heating elements, water pumps, and piping systems, extending the equipment's lifespan. Finally, this design also enhances the user experience, reduces problems caused by equipment malfunctions or incomplete cleaning, and reduces exhaust emissions by recovering heat energy, aligning with green environmental protection principles. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of a high-efficiency gas preheating module according to the present invention.

[0015] Figure 2 This is an external structural diagram of a high-efficiency gas preheating module according to the present invention.

[0016] In the diagram: 11 Controller, 121 Gas Divider, 122 Gas Nozzle, 13 Gas Control Valve, 14 First Heat Exchange Chamber, 15 Smoke Storage Chamber, 16 Air Pump, 17 Second Heat Exchange Chamber, 18 Smoke Exhaust Chamber, 19 Water Inlet Control Valve Detailed Implementation

[0017] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0018] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "horizontal", etc., 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 limitations on this utility model.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] The attached figure shows the preferred embodiment of this high-efficiency gas preheating module. The present invention will be further described in detail below with reference to the attached figure.

[0021] Please see Figures 1-2 This utility model is a gas-fired high-efficiency preheating module for commercial dishwashers, including an outer shell, an inner shell, a preheating module, a gas module, and a controller 11.

[0022] This utility model is an assembly module for a commercial dishwasher. The outermost layer of this utility model is an outer shell, which is a box structure. The front of the outer shell has a display unit and buttons, the sides have a gas inlet, a water inlet, a water outlet, and an air inlet, and the top has a smoke exhaust outlet. A movable baffle is located inside the air inlet of the outer shell, and a servo motor is fixedly connected to one side of the movable baffle. When assembling this module, the gas interface and the tap water interface are connected, and a flue is connected at the smoke exhaust outlet.

[0023] The inner shell, located outside the combustion chamber and the first heat exchange chamber 14, is square in shape. It isolates the flame from high-temperature surfaces, preventing burns from user contact, blocking external airflow interference with the flame, ensuring stable combustion, and preventing gas leakage due to flameout. Furthermore, the shell concentrates the heat generated by the flame, reducing heat loss, improving thermal efficiency, and preventing dust, oil, and other debris from entering the combustion zone, protecting internal components such as the burner and heat exchanger, and extending equipment lifespan. The inner shell also includes water and gas pipe through-holes, with high-temperature resistant sealing material applied between the through-holes and pipes. An air inlet is located at the gas nozzle 122 in the combustion chamber, corresponding to the side of the shell, facilitating air and gas mixing and aiding combustion.

[0024] The gas module includes a gas control valve 13, a first heat exchange chamber 14, a second heat exchange chamber 17, a smoke storage chamber 15, a smoke exhaust chamber 18, a combustion chamber, and several temperature sensors. The gas control valve 13 is connected to the combustion chamber via a gas pipeline. The combustion chamber includes a gas distribution device 121, gas nozzles 122, an ignition device, and a flame sensor. Gas is split into multiple streams by the gas distribution device 121 and mixed with air at the inlet of the gas nozzles 122. Upon receiving a water usage command, the gas control valve 13 opens, releasing gas through the gas nozzles 122. The controller 11 controls the ignition device to perform an ignition operation. The controller 11 then reads data returned by the flame sensor to determine if ignition was successful. If no flame is detected, the ignition operation is repeated. If ignition still fails, the gas control valve 13 is closed to prevent gas leakage. Simultaneously, a module error message is displayed on the screen and a buzzer.

[0025] A first heat exchange chamber 14 is located above the combustion chamber. A water flow pipe is spirally embedded in the outer wall of the first heat exchange chamber 14. The water inlet of this module is connected to a water inlet control valve 19 via a water flow pipe, and a pipe from the water inlet control valve 19 is connected to the first heat exchange chamber 14 via a water flow pipe. The water flow pipe is connected to a preheating water tank. The water in the water flow pipe is heated through the first heat exchange chamber 14. A smoke storage chamber 15 is located above the first heat exchange chamber 14. The smoke storage chamber 15 is connected to a suction pump 16 via a gas pipe. The output end of the suction pump 16 is connected to a second heat exchange chamber 17 via a pipe. An exhaust chamber 18 is connected to the top of the second heat exchange chamber 17. The exhaust gas and preheated gas after combustion are transferred to the second heat exchange chamber 17 via the suction pump 16 for secondary utilization. A preheating water tank is located inside the second heat exchange chamber 17. The preheating water tank undergoes heat exchange through the second heat exchange chamber 17, reheating the water inside.

[0026] The second heat exchange chamber 17 is surrounded by a spiral coil. One end of the coil is connected to a two-way valve and the other end is connected to the exhaust port. The other output end of the two-way valve is directly connected to the exhaust port, and the input end of the two-way valve is connected to the air pump 16.

[0027] If the temperature inside the water tank differs from the set water temperature by more than a threshold, the water tank will be heated by preheating with exhaust gas through a two-way valve.

[0028] The preheating module includes a preheating water tank, an inlet control valve 19, and a water tank valve. The preheating water tank has embedded finned plates with heating wires embedded within them. Temperature sensors are also installed at both the top and bottom of the preheating water tank. If a higher water temperature is required, auxiliary heating is provided by the heating wires to accelerate the heating process. The embedded finned plates increase the contact area between the heating elements and the water flow in the tank, resulting in more efficient heating of the water. The temperature sensors detect the water temperature in the tank; if the water temperature meets the threshold, the water tank valve is opened to supply water to the commercial dishwasher.

[0029] The specific working method of this module is as follows:

[0030] The signal line of module controller 11 is connected to the main unit of the commercial dishwasher to receive temperature commands. When the dishwasher is turned on but no water temperature heating command is issued, the gas is turned on to store water in the water tank, the water temperature is set to the minimum required value, and the water tank is kept warm by electric heating. The gas flow is controlled by gas control valve 13, and the water temperature is controlled by the opening and closing of the air inlet. If the required value and the water temperature in the tank are close, only electric heating of the water tank is used. If the difference between the required value and the water temperature in the tank is greater than the set value, the two-way valve is opened, and heat exchange in the second heat exchange chamber 17 and electric heating work together to heat the water tank. During use, the water inlet control valve 19 and the water tank outlet valve are controlled to ensure that the water tank contains a certain amount of stored water.

[0031] The display unit of this module is used to set the water temperature control program, display the water temperature, and issue error alarms. The desired water temperature and number of cleaning cycles can be set via buttons, and the temperature is displayed on the display unit. In another embodiment, a gas concentration sensor is installed inside the outer casing; if the concentration reaches a certain limit, an alarm is triggered via the display unit, and a buzzer provides an audible alarm.

[0032] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A high-efficiency gas preheating module, characterized in that: Includes an outer casing, an inner casing, a preheating module, a gas module, and a controller (11). The preheating module includes a preheating water tank, an inlet control valve (19) and a water tank valve. The preheating water tank is embedded with a finned plate, and the finned plate is embedded with an electric heating wire. Temperature sensors are also provided at the upper and lower ends of the preheating water tank. The gas module includes a gas control valve (13), a first heat exchange chamber (14), a second heat exchange chamber (17), a smoke storage chamber (15), a smoke exhaust chamber (18), a combustion chamber, and several temperature sensors; The control unit includes a controller (11), a display unit and buttons; the control unit is electrically connected to the heating wire, water inlet control valve (19) and water tank valve of the preheating module, as well as the gas control valve (13) and temperature sensor of the gas module; A gas control valve (13) is connected to the combustion chamber via a gas pipeline. A first heat exchange chamber (14) is provided above the combustion chamber. A smoke storage chamber (15) is provided above the first heat exchange chamber (14). The smoke storage chamber (15) is connected to a suction pump (16) via a gas pipeline. The output end of the suction pump (16) is connected to a second heat exchange chamber (17) via a pipeline. A smoke exhaust chamber (18) is connected to the top of the second heat exchange chamber (17). A preheating water tank is provided inside the second heat exchange chamber (17).

2. The gas high-efficiency preheating module according to claim 1, characterized in that, The outer wall of the first heat exchange chamber (14) is spirally embedded with a water flow pipe, which is connected to the preheating water tank.

3. The gas high-efficiency preheating module according to claim 1, characterized in that, The combustion chamber includes a gas distribution device (121), a gas nozzle (122), an ignition device, and a flame sensor.

4. The gas high-efficiency preheating module according to claim 1, characterized in that, The outer casing is located on the outermost side of the device and is a box structure. The front of the outer casing is equipped with a display unit and buttons, the sides are equipped with a gas inlet, a water inlet, a water outlet and an air inlet, and the top is equipped with a smoke exhaust port.

5. A high-efficiency gas preheating module according to claim 1, characterized in that, A movable baffle is provided on the inner side of the air inlet of the outer casing, and a servo motor is fixedly connected to one side of the movable baffle.

6. A high-efficiency gas preheating module according to claim 1, characterized in that, The inner shell is located outside the combustion chamber and the first heat exchange chamber (14). The inner shell is also provided with a water pipe through hole and a gas pipe through hole. The through hole and the pipe are coated with a high-temperature resistant sealing material.

7. A high-efficiency gas preheating module according to claim 1, characterized in that, The second heat exchange chamber (17) is surrounded by a spiral coil. One end of the coil is connected to the other end of the two-way valve and connected to the exhaust port. The other output end of the two-way valve is directly connected to the exhaust port, and the input end of the two-way valve is connected to the air pump (16).

8. A high-efficiency gas preheating module according to claim 1, characterized in that, The water inlet is connected to the water inlet control valve (19) via a water flow pipeline.

9. A high-efficiency gas preheating module according to claim 1, characterized in that, The water tank valve is located at the inlet and outlet of the preheating water tank, and the outlet of the preheating water tank is connected to the outlet of the outer casing via a pipe.

10. A high-efficiency gas preheating module according to claim 1, characterized in that, The gas module also includes a gas inlet, which is located on the outer housing and is connected to a gas control valve (13).

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