Automatic accumulated oil discharging device of kitchen oil smoke discharging system
By introducing an automated oil exhaust device with heating wires and siphon pipes into the kitchen exhaust system, the problem of frequent cleaning required by traditional systems has been solved, resulting in longer cleaning intervals and stable system operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN HELIDAO ENG DESIGN GRP CO LTD
- Filing Date
- 2025-04-24
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional kitchen exhaust systems require frequent cleaning of the grease traps, resulting in a heavy workload and fire risk. Existing technologies are unable to effectively reduce the cleaning frequency.
The system combines heating wire and siphon tube, and uses a liquid level sensor and PLC control module to achieve automated oil drainage. The heating wire heats the accumulated oil to a liquid state, and the siphon tube discharges it. The system also incorporates quick connectors and wastewater branch pipes for regular cleaning.
The cleaning frequency was reduced and the cleaning interval was extended from once or twice a day to once every half month or month, which reduced the workload of property staff and ensured the normal operation of the system.
Smart Images
Figure CN224151000U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an automatic oil discharge device for a kitchen exhaust system, belonging to the field of kitchen equipment technology. Background Technology
[0002] The proportion of catering businesses in commercial complexes and community shops has increased significantly, forming a trend of "catering clustering". Under these circumstances, the workload of daily maintenance of the exhaust system by property management has increased sharply.
[0003] Traditional kitchen exhaust systems require the exhaust pipe to have a 2% slope towards the exhaust hood and the lowest point. The bottom of the exhaust pipe should be equipped with a DN25 copper gate valve and a cleanout port. The copper gate valve is used for oil drainage, and the cleanout port is a line no less than 600mm long. mm For branch pipes smaller than 500mm, a cleaning port should be installed every 3 meters, and an oil drain should be installed at the lowest point; grease accumulated in the fume extraction system should be discharged in a timely manner to prevent blockage and fire risk; specifically: the temperature of the existing fume extraction duct system is generally between 80℃ and 120℃, and the grease in the airflow is in the form of oil vapor; the fumes are driven by the fume extraction fan, discharged from the fume hood to the purifier for treatment, and then discharged into the atmosphere by the fume extraction fan; during the movement of the fume airflow, the grease and water vapor in the fume collide and condense into large oil particles. When the volume and weight of the oil particles are greater than the fan's suction force, they sink, hang on the wall and flow down under the action of gravity, accumulating in the oil drain tank.
[0004] Based on the above, and considering factors such as kitchen usage frequency, cooking type, and performance of fume purification equipment, the oil drain outlet, which was originally required to be cleaned once or twice a day under high-frequency conditions, is now a tedious task.
[0005] Therefore, this utility model provides an automatic oil removal device for kitchen exhaust systems that reduces cleaning frequency and extends cleaning intervals. Utility Model Content
[0006] In view of this, the purpose of this utility model is to provide an automatic oil removal device for a kitchen exhaust system that reduces cleaning frequency and extends cleaning intervals.
[0007] This utility model is implemented as follows:
[0008] An automatic oil discharge device for a kitchen exhaust system includes an oil discharge tank and heating wires. The oil discharge tank is detachably and fixedly connected to the bottom of the exhaust duct. The heating wires are a plurality of units, which are divided into two groups and arranged around the outer surface of the oil discharge tank.
[0009] This utility model also includes a liquid level sensor, a siphon tube, and a PLC control module. The liquid level sensor is installed at the top of the oil discharge tank, the siphon tube is located inside the oil discharge tank, and one end of the siphon tube is exposed outside the discharge port of the oil discharge tank. The PLC control module is located outside the oil discharge tank and is electrically connected to the heating wire.
[0010] As a further improvement, the two sets of heating wires are electrically connected.
[0011] As a further improvement, the top outer surface of the oil drain bucket is engraved with a first thread, and the bottom of the fume duct corresponding to the first thread is engraved with a second thread, so that the oil drain bucket and the oil drain port at the bottom of the fume duct are threadedly connected.
[0012] As a further improvement, it also includes a quick connector and a wastewater branch pipe, the wastewater branch pipe being located on one side of the oil discharge tank, and the output end of the siphon pipe being mechanically connected to the wastewater branch pipe via a quick connector, so that waste oil can be discharged to the wastewater branch pipe.
[0013] As a further improvement, the liquid level sensor is a photoelectric liquid level sensor, which is connected to the PLC control module via signal connection.
[0014] As a further improvement, the PLC control module includes a timed alarm module.
[0015] As a further improvement, a P-shaped oil trap is provided at the bottom of the siphon tube.
[0016] As a further improvement, the quick connector is made of heat-free PPR material.
[0017] The beneficial effects of this utility model are: because this utility model has the heating function of the oil drain tank and the siphon oil draining function of the siphon pipe, the traditional oil drain port is cleaned once or twice a day under the original high frequency state, which is optimized to be cleaned once every half month or once a month. Moreover, each cleaning removes the carbon black and tar particles and other sediments in the oil drain tank, which greatly reduces the workload of property staff and ensures the normal operation of the fume extraction system. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0019] Figure 1 This is a plan view of an automatic oil removal device for a kitchen exhaust system provided by an embodiment of the present invention.
[0020] Figure 2 This is a partial structural schematic diagram of an automatic oil removal device for a kitchen exhaust system provided in an embodiment of the present invention.
[0021] Attached reference numerals: 10 oil drain tank, 20 heating wire, 30 liquid level sensor, 40 siphon pipe, 50 PLC control module, 60 quick connector, 70 wastewater branch pipe. Detailed Implementation
[0022] 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. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0023] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0024] Reference Figures 1-2 As shown in the figure, this embodiment provides a specific implementation of an automatic oil discharge device for a kitchen exhaust system, including an oil discharge tank 10 and heating wires 20. The oil discharge tank 10 is detachably and fixedly connected to the bottom of the exhaust duct. There are several heating wires 20, which are divided into two groups and arranged around the outer surface of the oil discharge tank 10. The heating wires 20 are electrically connected to an external power source.
[0025] This utility model also includes a liquid level sensor 30, a siphon tube 40, and a PLC control module 50. The liquid level sensor 30 is installed at the top of the oil discharge tank 10. The siphon tube 40 is located inside the oil discharge tank 10, and one end of the siphon tube 40 passes through the discharge port of the oil discharge tank 10 and is exposed outside. The PLC control module 50 is located outside the oil discharge tank 10 and is electrically connected to the heating wire 20.
[0026] In this embodiment, the top outer surface of the oil drain tank 10 is engraved with a first thread, and the bottom of the fume duct corresponding to the first thread is engraved with a second thread, so that the oil drain tank 10 and the oil drain port at the bottom of the fume duct are threadedly connected.
[0027] Furthermore, it also includes a quick connector 60 and a wastewater branch pipe 70. The wastewater branch pipe 70 is located on one side of the oil discharge tank 10. The output end of the siphon pipe 40 is mechanically connected to the wastewater branch pipe 70 through the quick connector 60 so that waste oil can be discharged to the wastewater branch pipe 70.
[0028] Furthermore, the quick connector 60 is a heat-free quick connector. The quick connector can be inserted into or rotated into the pipe, making the connection simple and enabling the pipe connection work to be completed quickly.
[0029] In the above technical solution, quick connector 60 is used as the connection medium to facilitate the property staff to regularly disassemble and clean the carbon black and tar particles in the oil drain tank 10, and to prevent carbon black and tar particles from clogging the siphon pipe 40.
[0030] In one specific embodiment, a T-shaped pipe is provided at the connection between the quick connector 60 and the wastewater branch pipe 70. The two ends of the T-shaped pipe are connected to the quick connector 60 and the wastewater branch pipe 70 respectively, and the remaining end is exposed to the air.
[0031] In this embodiment, a P-type oil trap is provided at the bottom of the siphon pipe 40. The water level of the P-type oil trap can be set according to the negative pressure of the drain port. The P-type oil trap uses the pressure generated by the oil seal to balance the negative pressure in the wastewater branch pipe 70, allowing excess waste oil to be discharged through the siphon pipe 40. The P-type oil trap and the P-type water trap have the same structure, the difference being that the P-type oil trap stores oil, while the P-type water trap stores water. The water level of the P-type oil trap is as follows: Figure 2 Position B is shown.
[0032] In this embodiment, the two sets of heating wires 20 are electrically connected. The heating wires are activated to heat the oil level line based on the liquid level sensor 30. Figure 2 Position A, as shown, means that when the liquid level in the oil drain tank reaches a certain level, the heating wire 20 will be automatically energized to start working.
[0033] In this embodiment, the liquid level sensor 30 is a photoelectric liquid level sensor, and the photoelectric liquid level sensor is connected to the PLC control module 50 via signal connection.
[0034] Furthermore, the PLC control module 50 includes a timed alarm module, which is a system component that can automatically trigger an alarm after a set time. When the oil level in the oil tank 10 is higher than the oil level line detected by the photoelectric sensor and the heating wire 20 is activated to heat the oil level line, it indicates that the siphon pipe is blocked. At this time, the PLC control module sends an alarm signal to remind property personnel to clear the blockage.
[0035] Based on the above technical solutions, the background and working principle of this utility model in practical applications are as follows:
[0036] In the above technical solutions, when the fume extraction system is working, the liquid cannot be discharged normally because the oil drain tank is under negative pressure; and under the liquid seal of the P-bend oil trap, the gas in the wastewater branch pipe 70 will not be drawn back into the fume extraction duct system.
[0037] When the exhaust system stops working, the air pressure in the exhaust duct is the same as atmospheric pressure, and the wastewater branch pipe 70 is equipped with a tee pipe, so the pressure inside the wastewater branch pipe 70 is also the same as atmospheric pressure; and the temperature inside the wastewater branch pipe 70 tends to room temperature as the system stops working for a longer period of time.
[0038] The oil in the oil drain tank 10 is in a water emulsion state or a solidified state. Normally, the photoelectric liquid level sensor 30 on the oil drain tank 10 sends a corresponding signal value to the PLC control module 50 based on the oil level.
[0039] The PLC control module 50 is connected to the heating wire 20 on the outer wall of the oil drain tank 10. The heating wire 20 heats the oil to ensure that the accumulated oil melts into a liquid state. When the oil level reaches the height of the siphon pipe, the oil is automatically discharged to the wastewater branch pipe 70 under the siphon of the siphon pipe. The wastewater branch pipe 70 discharges the oil to the external oil separator for treatment. At this time, one automatic oil discharge action is completed.
[0040] In summary, this utility model, with its heating function in the oil drain tank and the siphon function in the siphon pipe, optimizes the traditional oil drain port from being cleaned once or twice a day under high-frequency conditions to being cleaned once every half month or once a month. Each cleaning removes the carbon black and tar particles and other sediments from the oil drain tank, greatly reducing the workload of property management personnel and ensuring the normal operation of the fume extraction system.
[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A kitchen fume exhaust system automatic oil discharge device, characterized in that, It includes an oil drain tank (10) and heating wires (20). The oil drain tank (10) is detachably and fixedly connected to the bottom of the fume duct. There are several heating wires (20). The heating wires (20) are divided into two groups and are arranged around the outer surface of the oil drain tank (10). It also includes a liquid level sensor (30), a siphon tube (40) and a PLC control module (50). The liquid level sensor (30) is installed at the top of the oil drain tank (10). The siphon tube (40) is located inside the oil drain tank (10), and one end of the siphon tube (40) is exposed outside the discharge port of the oil drain tank (10). The PLC control module (50) is located outside the oil drain tank (10) and is electrically connected to the heating wire (20).
2. The automatic oil discharge device of the kitchen fume exhaust system according to claim 1, characterized in that, The two sets of heating wires (20) are electrically connected.
3. The automatic oil discharge device of the kitchen hood system according to claim 2, characterized in that, The top outer surface of the oil drain barrel (10) is engraved with a first thread, and the bottom of the fume duct corresponding to the first thread is engraved with a second thread, so that the oil drain barrel (10) and the oil drain port at the bottom of the fume duct are threadedly connected.
4. The automatic oil discharge device of the kitchen hood system according to claim 1, characterized in that, It also includes a quick connector (60) and a wastewater branch pipe (70), the wastewater branch pipe (70) being located on one side of the oil drain tank (10), and the output end of the siphon pipe (40) being mechanically connected to the wastewater branch pipe (70) via the quick connector (60) so that waste oil can be discharged to the wastewater branch pipe (70).
5. The automatic oil discharge device of the kitchen hood system according to claim 1, characterized in that, The liquid level sensor (30) is a photoelectric liquid level sensor, and the photoelectric liquid level sensor is connected to the PLC control module (50) via signal.
6. The automatic oil discharge device of the kitchen hood system according to claim 5, characterized in that, The PLC control module (50) includes a timed alarm module.
7. The automatic oil discharge device of the kitchen fume exhaust system according to claim 4, characterized in that, The bottom of the siphon tube (40) is provided with a P-shaped oil trap.
8. The automatic oil discharging device of the kitchen fume exhaust system according to claim 4, characterized in that, The quick connector (60) is made of heat-free PPR material.