A large commercial gas stove with heat storage and heat preservation function

Abstract

The present invention relates to a large commercial gas stove with heat storage and heat preservation function, belonging to the field of gas stove heat storage and heat preservation technology. The large commercial gas stove comprises a gas stove and a water storage device, wherein the gas stove is provided with a heat exchanger, a water supply component and a water return component are provided between the heat exchanger and the water storage device, the water storage device has a main water outlet and a secondary water outlet, and a cooling component is provided on the secondary water outlet, a three-way valve is provided at the water inlet of the water supply component, the three-way valve is connected to the main water outlet and the cooling component, and a first temperature sensor is provided at the water outlet of the heat exchanger. In the present invention, when the first temperature sensor detects that the water temperature reaches a first preset value, if the liquid level of the water storage device does not reach the upper limit water level, the three-way valve is connected to the main water outlet, and the water storage device is connected to tap water, otherwise, the three-way valve is connected to the secondary water outlet through the cooling component to prevent the heat exchanger from scaling due to overheating of the water body.

Description

Technical Field

[0001] The invention belongs to the technical field of heat storage and heat preservation of gas stoves, and in particular relates to a large commercial gas stove with heat storage and heat preservation functions. Background Art

[0002] Compared with household gas stoves, commercial gas stoves have the characteristics of strong firepower, fast cooking and good cooking quality. They are widely used in canteens of various schools, hospitals, government agencies, enterprises and institutions, as well as various hotels and guesthouses. The stock of various commercial gas stoves is about 12-15 million heads (eyes), and the annual consumption of various types of gas is equivalent to about 45 billion cubic meters of natural gas.

[0003] The thermal efficiency of gas stoves on the market is generally less than 50%. Part of the heat generated is dissipated into the surrounding environment in the form of high-temperature flue gas. With the increase in the demand for hot water in the kitchen, existing commercial gas stoves are equipped with a heat exchanger on the exhaust pipe and an insulated water storage tank connected to the heat exchanger. When the water in the water storage tank passes through the heat exchanger, it can absorb the heat in the high-temperature flue gas, realize waste heat recovery, and store the flue gas heat that was previously difficult to use in the water storage tank. When the kitchen needs hot water, hot water is supplied through the water storage tank, thereby improving the energy utilization rate of the gas stove.

[0004] Although existing commercial gas stoves can absorb heat from high-temperature flue gas, the heat exchanger is prone to local overheating and scale adhesion during the heat absorption process. For large commercial gas stoves, the firepower is greater and the above phenomenon is more likely to occur. The presence of scale not only reduces the heat transfer efficiency of the heat exchanger, but also may cause blockage and corrosion of the waterway. Specifically, the temperature range where scale is easily formed is usually between 60 and 100°C. As the water temperature increases, the scaling rate tends to increase exponentially. When the water temperature exceeds the threshold, the scaling rate of the water body will increase sharply. When the water temperature in the heat exchanger is too high, if the heat exchanger is drained to suppress scale, the water in the heat exchanger will be difficult to drain quickly. At this time, the residual water will heat up quickly, and a large amount of scale will be generated. If the scale is suppressed by increasing the capacity of the water tank, the volume of the water tank is too large, there is a phenomenon of occupying kitchen space, and the amount of insulation material used in the water tank will also increase. If the water tank is drained and connected to tap water for cooling, it will cause a certain waste of water resources. It can be seen that how to suppress scaling of the water in the heat exchanger during the heat storage and heat preservation process of the existing gas stove is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present invention is to provide a large commercial gas stove with heat storage and heat preservation function in order to solve the above problems, which can effectively suppress the scaling of the heat exchanger.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] A large commercial gas stove with heat storage and heat preservation functions comprises a gas cooker, a heat exchanger is arranged on a smoke exhaust channel of the gas cooker, the heat exchanger is connected with a water storage device, and a water supply component and a water return component are arranged between the heat exchanger and the water storage device, the water storage device has a main water outlet and a secondary water outlet, and a cooling component is arranged on the secondary water outlet, a three-way valve is arranged at the water inlet of the water supply component, and two water inlets of the three-way valve are respectively connected with the main water outlet and the cooling component; a first temperature sensor is arranged at the water outlet of the heat exchanger, and when the first temperature sensor detects that the water temperature is not less than a first preset value, if the liquid level of the water storage device does not reach the upper limit water level, the three-way valve is connected with the main water outlet of the water storage device, and the water storage device is connected with tap water, otherwise, the three-way valve is connected with the secondary water outlet of the water storage device through the cooling component, and the water storage device is not connected with tap water.

[0008] The water storage device is equipped with a level gauge for detecting the liquid level. After the gas stove is ignited, the water in the water storage device is pumped into the heat exchanger through the water supply component. When the high-temperature flue gas passes through the heat exchanger, the water absorbs the heat in the high-temperature flue gas to form hot water. The hot water returns to the water storage device along the return water component. The water storage device, water supply component, heat exchanger and return water component together form a waste heat recovery circulation pipe system. When there is a need for hot water in the kitchen, hot water is provided to the user through the water supply component.

[0009] As the working time of the gas cooker increases, the water in the waste heat recovery circulation pipe system gradually heats up. When the first temperature sensor measures that the water temperature at the outlet of the heat exchanger rises to the first preset value, the liquid level in the water storage device is detected by the liquid level meter. If the liquid level of the water storage device measured by the liquid level meter does not reach the upper water level, the three-way valve is connected to the main water outlet of the water storage device, and the water storage device is replenished with tap water. Otherwise, the three-way valve is connected to the auxiliary water outlet of the water storage device through the cooling component, and the water inlet connected to the main water outlet of the three-way valve is closed, and the water storage device is not replenished with tap water at this time. The hot water flowing out of the auxiliary water outlet is cooled in the cooling component, and then enters the heat exchanger through the water supply component to prevent scaling inside the heat exchanger due to overheating of the water body.

[0010] As a further optimization scheme of the present invention, the water storage device is connected to a water replenishment component, which includes a water replenishment pipe connected to the water storage device and a first solenoid valve arranged on the water replenishment pipe, and the first solenoid valve is used to adjust the tap water on-off status of the water storage device.

[0011] As a further optimization scheme of the present invention, the cooling component includes a cooling pipe and a guide pipe coiled on the outside of the water storage equipment, the water inlet and water outlet of the cooling pipe are respectively connected to the auxiliary water outlet of the water storage equipment and the water inlet of the guide pipe, and the cooling pipe is connected to the three-way valve through the guide pipe.

[0012] As a further optimization solution of the present invention, the water storage device is provided with a scalding prevention baffle assembly, and the baffle assembly is surrounded and arranged on the outside of the cooling pipe.

[0013] As a further optimization scheme of the present invention, the partition assembly includes a fixed cylinder fixedly arranged on the outside of the water storage device and an adjusting cylinder slidably arranged on the fixed cylinder, and a first telescopic component for driving the adjusting cylinder to slide up and down, a first through hole is opened on the side wall of the fixed cylinder, and a second through hole is opened on the side wall of the adjusting cylinder.

[0014] As a further optimization scheme of the present invention, the cooling component is provided with a second temperature sensor for detecting the outlet water temperature of the cooling pipe, and the first telescopic component drives the adjustment cylinder according to the temperature data collected by the second temperature sensor to adjust the intersection area of ​​the first through hole and the second through hole.

[0015] As a further optimization scheme of the present invention, the barrier assembly also includes multiple top covers arranged on the top of the fixed cylinder, and a second telescopic component for adjusting the horizontal position of the top covers. When the first temperature sensor detects that the water temperature is lower than a second preset value, the multiple top covers fit against the outer wall of the water storage device to close the opening at the top of the fixed cylinder. Conversely, the second telescopic component drives the top cover away from the water storage device to open the opening of the fixed cylinder. The second preset value is greater than the first preset value.

[0016] As a further optimization scheme of the present invention, the water supply component includes a water supply pipe arranged at the water outlet of the three-way valve, and a water pump arranged on the water supply pipe. The return water component includes a return water pipe arranged between the heat exchanger and the water storage device, and a hot water terminal is provided on the water supply pipe.

[0017] As a further optimization scheme of the present invention, the heat exchanger includes a water jacket, an upper water pipe arranged at the water inlet of the water jacket, a second solenoid valve arranged on the upper water pipe, and a drain pipe arranged at the water outlet of the water jacket, the water jacket is connected to the water supply pipe through the upper water pipe, and the water jacket is connected to the return pipe through the drain pipe, the smoke exhaust channel of the gas cooker runs through the water jacket, and the gas cooker is provided with a main fire valve linked to the second solenoid valve.

[0018] As a further optimization scheme of the present invention, the heat exchanger also includes two vertical plates symmetrically arranged inside the water jacket, and a plurality of horizontal fin tubes fixedly arranged between the two vertical plates, and a plurality of staggered transverse partitions are provided on the opposite inner side walls of the water jacket.

[0019] The beneficial effects of the present invention are:

[0020] 1) When the water temperature at the outlet of the heat exchanger exceeds a first preset value, the present invention detects the liquid level of the water storage device. If the liquid level does not reach the upper water level, the three-way valve is connected to the main water outlet of the water storage device, and the water storage device is replenished with tap water. Otherwise, the three-way valve is connected to the secondary water outlet of the water storage device through the cooling component, and tap water is not replenished. The hot water flowing out of the secondary water outlet is cooled in the cooling component, and then enters the heat exchanger through the water supply component, so as to prevent scaling of the heat exchanger due to overheating of the water body, recover and store the waste heat of the high-temperature flue gas, and avoid the waste of water resources caused by the scaling of the heat exchanger;

[0021] 2) The present invention uses a barrier component to block the cooling pipe, thereby isolating the user from the cooling pipe to prevent the user from being scalded by the cooling pipe. The barrier component can also prevent the heat in the cooling pipe from being lost too quickly, so that the cooling pipe coiled outside the water storage device can play a certain role in heat preservation for the gas cooker, while avoiding the waste of water resources, and also reducing the waste of high-temperature flue gas waste heat as much as possible;

[0022] 3) In the present invention, when the first temperature sensor detects that the temperature of the heat exchanger exceeds the first preset value, the cooling pipe needs to reduce the water body to the target temperature, and the first electric push rod adjusts the intersection area of ​​the first through hole and the second through hole according to the difference between the outlet water temperature of the cooling pipe measured by the second temperature sensor and the target temperature. The larger the difference, the larger the intersection area of ​​the first through hole and the second through hole, thereby accurately controlling the waste heat released by the cooling pipe and further reducing the waste heat.

[0023] 4) The present invention further prevents excessive heat dissipation of the cooling pipe by setting a split capping structure on the top of the baffle assembly. When the capping structure is set, in order to avoid a sharp increase in the scaling rate of the water in the heat exchanger due to excessively high temperature of the heat exchanger, when the first temperature sensor detects that the water temperature is lower than the second preset value, the top cover closes the opening of the fixed cylinder. Otherwise, the second electric push rod drives the top cover to open the opening of the fixed cylinder, thereby more reasonably controlling the heat dissipation rate of the cooling assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the working state of the water storage device of the present invention when the liquid level does not reach the upper water level;

[0026] Figure 3 It is a schematic diagram of the working state of the water storage device of the present invention when the liquid level reaches the upper limit water level;

[0027] Figure 4 It is a schematic diagram of the heat exchanger structure of the present invention;

[0028] Figure 5It is a schematic diagram of the structure of a gas cooker of the present invention.

[0029] In the figure: 1. gas cooker; 2. heat exchanger; 3. water storage equipment; 4. water supply component; 5. return water component; 6. cooling component; 7. three-way valve; 8. water supply component; 9. baffle component; 21. water jacket; 22. water supply pipe; 23. second solenoid valve; 24. drain pipe; 25. vertical plate; 26. finned tube; 27. horizontal partition; 41. water supply pipe; 42. water pump; 51. return water pipe; 61. cooling pipe; 62. guide pipe; 81. water supply pipe; 82. first solenoid valve; 91. fixing cylinder; 92. adjusting cylinder; 93. first through hole; 94. second through hole; 95. top cover; 96. first electric push rod; 97. second electric push rod; T1. first temperature sensor; T2. second temperature sensor; T3. third temperature sensor; H. liquid level meter; U. hot water terminal; F. main fire valve. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0031] Example

[0032] like Figure 1-3As shown, a large commercial gas stove with heat storage and heat preservation function comprises a gas cooker 1, a heat exchanger 2 is arranged on the smoke exhaust channel of the gas cooker 1, the heat exchanger 2 is connected with a water storage device 3, and a water supply component 4 and a return water component 5 are arranged between the heat exchanger 2 and the water storage device 3, the water storage device 3 has a main water outlet and an auxiliary water outlet, and a cooling component 6 is arranged on the auxiliary water outlet, a three-way valve 7 is arranged at the water inlet of the water supply component 4, and two water inlets of the three-way valve 7 are respectively connected to the main water outlet and the cooling component 6; specifically, the water supply component 4 comprises a water supply pipe 41 arranged at the water outlet of the three-way valve 7, and a water pump 42 arranged on the water supply pipe 41, the return water component 5 comprises a return water pipe 51 arranged between the heat exchanger 2 and the water storage device 3, and a hot water terminal U is arranged on the water supply pipe 41, and the hot water terminal U is preferably arranged at a faucet of the gas cooker 1, a sink or a toilet. The heat exchanger 2 includes a water jacket 21, an upper water pipe 22 arranged at the water inlet of the water jacket 21, a second solenoid valve 23 arranged on the upper water pipe 22, and a drain pipe 24 arranged at the water outlet of the water jacket 21. The water jacket 21 is connected to the water supply pipe 41 through the upper water pipe 22, and the water jacket 21 is connected to the return pipe 51 through the drain pipe 24. The smoke exhaust channel of the gas cooker 1 runs through the water jacket 21, and the gas cooker 1 is provided with a main fire valve F linked to the second solenoid valve 23. Multiple gas cookers 1 can be provided. When multiple gas cookers 1 are provided, each gas cooker 1 is equipped with a heat exchanger 2, and the water supply pipe 41 and the return pipe 51 are connected to each heat exchanger 2.

[0033] The water outlet of the heat exchanger 2 is provided with a first temperature sensor T1. When the first temperature sensor T1 detects that the water temperature is not less than a first preset value, if the liquid level of the water storage device 3 does not reach the upper water level, the three-way valve 7 is connected to the main water outlet of the water storage device 3, and the water storage device 3 is connected to tap water. Otherwise, the three-way valve 7 is connected to the secondary water outlet of the water storage device 3 through the cooling component 6, and the water storage device 3 is not connected to tap water. The water storage device 3 is provided with a liquid level gauge H for detecting the liquid level height. During daily use of the water storage device 3, a certain amount of tap water is stored inside it, and the liquid level of the water storage device 3 should not be lower than the lower water level h. min to ensure that it can provide refrigerant to heat exchanger 2.

[0034] After the gas cooker 1 is ignited, the second solenoid valve 23 is linked with the main fire valve F and is in an open state. The water supply component 4 pumps the water in the water storage device 3 into the heat exchanger 2 along the water supply pipe 41 through the water pump 42. The water enters the water jacket 21 from the upper water pipe 22 of the heat exchanger 2. The high-temperature flue gas passes through the water jacket of the heat exchanger 2 along the exhaust channel. At this time, the water can absorb the heat in the high-temperature flue gas to form hot water. The hot water returns to the water storage device 3 along the return pipe 51 of the return water component 5. The water storage device 3, the water supply component 4, the heat exchanger 2 and the return water component 5 together form a waste heat recovery circulation pipe system, which stores and insulates the waste heat of the high-temperature flue gas. When there is a need for hot water in the kitchen, turn on the faucet, and the hot water in the water storage device 3 is supplied to the faucet through the water supply component 4 to provide hot water for the user.

[0035] As the working time of the gas cooker 1 increases, the water in the waste heat recovery circulation pipe system gradually heats up. When the first temperature sensor T1 measures that the water temperature at the outlet of the heat exchanger 2 rises to a first preset value, the liquid level in the water storage device 3 is detected by the liquid level meter H. If the liquid level measured by the liquid level meter H does not reach the upper limit water level h max , the three-way valve 7 is connected to the main water outlet of the water storage device 3, and the water storage device 3 is replenished with tap water. Otherwise, the three-way valve 7 is connected to the auxiliary water outlet of the water storage device 3 through the cooling component 6, and the water inlet connected to the main water outlet of the three-way valve 7 is closed, and the water storage device 3 is not replenished with tap water at this time. The hot water flowing out of the auxiliary water outlet is cooled in the cooling component 6, and then enters the heat exchanger 2 through the water supply component 4 to prevent scaling inside the heat exchanger 2 due to overheating of the water body. Large commercial gas stoves have stronger firepower and are prone to scaling. This embodiment is mainly suitable for large commercial gas stoves, and can also be extended to ordinary gas stoves.

[0036] Furthermore, the water storage device 3 is connected to a water replenishment component 8, which includes a water replenishment pipe 81 connected to the water storage device 3 and a first solenoid valve 82 arranged on the water replenishment pipe 81, and the first solenoid valve 82 is used to adjust the tap water on-off status of the water storage device 3. The cooling component 6 includes a cooling pipe 61 and a flow guide pipe 62 coiled on the outside of the water storage device 3, the water inlet and the water outlet of the cooling pipe 61 are respectively connected to the auxiliary water outlet of the water storage device 3 and the water inlet of the flow guide pipe 62, and the cooling pipe 61 is connected to the three-way valve 7 through the flow guide pipe 62. The cooling pipe 61 is made of a material with strong thermal conductivity, and its material is preferably copper. The water storage device 3 is provided with an anti-scalding baffle component 9, and the baffle component 9 is surrounded and arranged on the outside of the cooling pipe 61.

[0037] The guide pipe 62 is located outside the barrier component 9 and is made of heat-insulating material to prevent the hot water flowing out of the auxiliary water outlet from causing the guide pipe 62 to be too hot, thereby preventing the user from being scalded. The barrier component 9 has a blocking effect on the cooling pipe 61, isolating the user from the cooling pipe 61 to prevent the user from being scalded by the cooling pipe 61. The barrier component 9 can also prevent the heat in the cooling pipe 61 from being lost too quickly, so that the cooling pipe 61 coiled outside the water storage device 3 plays a certain role in heat preservation for the gas cooker 1, while avoiding the waste of water resources, it also minimizes the waste of high-temperature flue gas waste heat.

[0038] Specifically, the barrier assembly 9 includes a fixed cylinder 91 fixedly arranged outside the water storage device 3, an adjusting cylinder 92 slidably arranged outside the fixed cylinder 91, and a first telescopic component for driving the adjusting cylinder 92 to slide up and down. The first telescopic component is preferably a first electric push rod 96 fixedly arranged at the bottom of the fixed cylinder 91. The first electric push rods 96 are evenly arranged outside the fixed cylinder 91, and the number of the first electric push rods 96 is not less than two. The output end of each first electric push rod 96 is fixedly connected to the bottom of the adjusting cylinder 92. A plurality of first through holes 93 are provided on the side wall of the fixed cylinder 91, and a plurality of second through holes 94 are provided on the side wall of the adjusting cylinder 92. The second through holes 94 correspond to the first through holes 93 one by one. The cooling assembly 6 is provided with a second temperature sensor T2 for detecting the outlet water temperature of the cooling pipe 61. The detection end of the second temperature sensor T2 is arranged near the connection between the cooling pipe 61 and the guide pipe 62. The first telescopic component drives the adjusting cylinder 92 according to the temperature data collected by the second temperature sensor T2 to adjust the intersection area of ​​the first through hole 93 and the second through hole 94.

[0039] When the first temperature sensor T1 detects that the temperature of the heat exchanger 2 exceeds the first preset value, the water flowing out of the water storage device 3 needs to be cooled, and the cooling pipe 61 needs to reduce the water to the target temperature. The first electric push rod 96 adjusts the intersection area of ​​the first through hole 93 and the second through hole 94 according to the difference between the outlet water temperature of the cooling pipe 61 measured by the second temperature sensor T2 and the target temperature. The larger the difference, the larger the intersection area of ​​the first through hole 93 and the second through hole 94, thereby accurately controlling the waste heat released by the cooling pipe 61 and further reducing the waste heat.

[0040] Furthermore, the barrier assembly 9 also includes a plurality of top covers 95 arranged on the top of the fixed cylinder 91, and a second telescopic component for adjusting the horizontal position of the top cover 95. There are at least two top covers 95, and each top cover 95 is correspondingly connected to a second telescopic component. The second telescopic component is preferably a second electric push rod 97 fixedly mounted on the outer wall of the water storage device 3, and the output end of each second electric push rod 97 is fixedly mounted on the corresponding top cover 95.

[0041] By setting a split capping structure, i.e., a plurality of adjustable top covers 95, on the top of the baffle assembly 9, excessive heat dissipation of the cooling tube 61 is further prevented. When the capping structure is set, in order to avoid a sharp increase in the scaling rate of the water body in the heat exchanger 2 due to the excessive temperature of the heat exchanger 2, when the first temperature sensor T1 detects that the water temperature is less than the second preset value, the second electric push rod 97 is in a contracted state, and the plurality of top covers 95 are attached to the outer wall of the water storage device 3 to close the opening at the top of the fixed cylinder 91. On the contrary, the second electric push rod 97 drives the top cover 95 away from the water storage device 3 to open the opening of the fixed cylinder 91. The second preset value is greater than the first preset value.

[0042] In addition, the heat exchanger 2 also includes two vertical plates 25 symmetrically arranged inside the water jacket 21, and a plurality of horizontal fin tubes 26 fixedly arranged between the two vertical plates 25. A plurality of interlaced transverse partitions 27 are arranged on the opposite inner side walls of the water jacket 21. The transverse partitions 27 cooperate with the fin tubes 26 to form a serpentine waterway inside the water jacket 21. The high-temperature flue gas flows from the smoke inlet of the water jacket 21 to the smoke outlet, and flows through the outside of each fin tube 26. The water body flows from the top to the bottom in the water jacket 21 in turn through the inside of the plurality of fin tubes 26 to achieve sufficient heat exchange, and the high-temperature flue gas and the water body are separated by the vertical plates 25. A third temperature sensor T3 is provided at the main water outlet of the water storage device 3, and a display is provided near each hot water terminal U. When the three-way valve 7 is connected to the main water outlet, the display shows the temperature data collected by the third temperature sensor T3. When the three-way valve 7 is connected to the secondary water outlet of the water storage device 3 through the cooling component 6, the display shows the temperature information collected by the second temperature sensor T2, which is convenient for the user to grasp the water temperature of the hot water terminal U and further prevent the user from being scalded.

[0043] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A large commercial gas stove with heat storage and heat preservation function, comprising a gas stove (1), a heat exchanger (2) is provided on a smoke exhaust passage of the gas stove (1), the heat exchanger (2) is connected to a water storage device (3), and a water supply component (4) and a water return component (5) are provided between the heat exchanger (2) and the water storage device (3), characterized in that: The water storage device (3) has a main water outlet and a secondary water outlet, and a cooling component (6) is provided on the secondary water outlet; the water inlet of the water supply component (4) is provided with a three-way valve (7), and the two water inlets of the three-way valve (7) are respectively connected to the main water outlet and the cooling component (6); The water outlet of the heat exchanger (2) is provided with a first temperature sensor (T1). When the first temperature sensor (T1) detects that the water temperature is not less than a first preset value, if the liquid level of the water storage device (3) has not reached the upper water level, the three-way valve (7) is connected to the main water outlet of the water storage device (3), and the water storage device (3) is connected to tap water. Otherwise, the three-way valve (7) is connected to the secondary water outlet of the water storage device (3) through the cooling component (6), and the water storage device (3) is not connected to tap water.

2. The large commercial gas stove with heat storage and heat preservation function according to claim 1 is characterized in that: The water storage device (3) is connected to a water replenishment component (8), and the water replenishment component (8) comprises a water replenishment pipe (81) connected to the water storage device (3) and a first solenoid valve (82) arranged on the water replenishment pipe (81), wherein the first solenoid valve (82) is used to adjust the on-off status of the tap water of the water storage device (3).

3. The large commercial gas stove with heat storage and heat preservation function according to claim 1 is characterized in that: The cooling component (6) comprises a cooling pipe (61) and a flow guide pipe (62) coiled on the outside of the water storage device (3); the water inlet and the water outlet of the cooling pipe (61) are respectively connected to the auxiliary water outlet of the water storage device (3) and the water inlet of the flow guide pipe (62); and the cooling pipe (61) is connected to the three-way valve (7) via the flow guide pipe (62).

4. The large commercial gas stove with heat storage and heat preservation function according to claim 3 is characterized in that: The water storage device (3) is provided with a scalding prevention baffle assembly (9), and the baffle assembly (9) is arranged to surround the outer side of the cooling pipe (61).

5. The large commercial gas stove with heat storage and heat preservation function according to claim 4 is characterized in that: The baffle assembly (9) comprises a fixed cylinder (91) fixedly arranged outside the water storage device (3), an adjusting cylinder (92) slidably arranged on the fixed cylinder (91), and a first telescopic component for driving the adjusting cylinder (92) to slide up and down, a first through hole (93) being provided on a side wall of the fixed cylinder (91), and a second through hole (94) being provided on a side wall of the adjusting cylinder (92).

6. The large commercial gas stove with heat storage and heat preservation function according to claim 5 is characterized in that: The cooling component (6) is provided with a second temperature sensor (T2) for detecting the outlet temperature of the cooling pipe (61), and the first telescopic component drives the regulating cylinder (92) according to the temperature data collected by the second temperature sensor (T2) to adjust the intersection area of ​​the first through hole (93) and the second through hole (94).

7. The large commercial gas stove with heat storage and heat preservation function according to claim 5 is characterized in that: The barrier assembly (9) further comprises a plurality of top covers (95) arranged on the top of the fixed cylinder (91), and a second telescopic component for adjusting the horizontal position of the top covers (95); when the first temperature sensor (T1) detects that the water temperature is less than a second preset value, the plurality of top covers (95) fit with the outer wall of the water storage device (3) to close the opening at the top of the fixed cylinder (91); conversely, the second telescopic component drives the top covers (95) away from the water storage device (3) to open the opening of the fixed cylinder (91); the second preset value is greater than the first preset value.

8. The large commercial gas stove with heat storage and heat preservation function according to claim 1 is characterized in that: The water supply assembly (4) comprises a water supply pipe (41) arranged at the water outlet of the three-way valve (7), and a water pump (42) arranged on the water supply pipe (41); the return water assembly (5) comprises a return water pipe (51) arranged between the heat exchanger (2) and the water storage device (3); and a hot water terminal (U) is provided on the water supply pipe (41).

9. The large commercial gas stove with heat storage and heat preservation function according to claim 1 is characterized in that: The heat exchanger (2) comprises a water jacket (21), an upper water pipe (22) arranged at a water inlet of the water jacket (21), a second electromagnetic valve (23) arranged on the upper water pipe (22), and a drainage pipe (24) arranged at a water outlet of the water jacket (21); the water jacket (21) is connected to a water supply pipe (41) via the upper water pipe (22), and the water jacket (21) is connected to a water return pipe (51) via the drainage pipe (24); a smoke exhaust channel of the gas cooker (1) passes through the water jacket (21), and a main fire valve (F) linked to the second electromagnetic valve (23) is provided on the gas cooker (1).

10. The large commercial gas stove with heat storage and heat preservation function according to claim 1, characterized in that: The heat exchanger (2) further comprises two vertical plates (25) symmetrically arranged inside the water jacket (21), and a plurality of horizontal fin tubes (26) fixedly arranged between the two vertical plates (25), and a plurality of mutually staggered transverse partitions (27) are provided on the opposite inner side walls of the water jacket (21).

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