A gas-fired energy-saving steamer

Abstract

This utility model discloses a gas-fired energy-saving steamer, belonging to the field of electric cooking appliances. It includes a pot body and a steam generating device. The steam generating device includes a steam generating pipe vertically installed at the bottom of the pot body. A waterproof hollow heating cavity is provided on the outer wall of the steam generating pipe, and a flame hot air heating coil is coiled inside the hollow heating cavity. It also includes a burner and an induced draft fan. In practical application, this utility model generates steam rapidly and has high thermal efficiency: by setting up an independent steam generating pipe and a flame hot air heating coil coiled around its outer side, the water inside the pipe is heated efficiently and centrally, significantly improving the steam generation speed and thermal utilization efficiency, resulting in significant energy savings. Furthermore, it has the advantages of uniform steam distribution and good steaming effect: through the combination structure of a steam cone hood and a steam distribution plate, the steam is concentrated and evenly sprayed, ensuring uniform heating of food and improving steaming quality.

Description

Technical Field

[0001] This utility model relates to an electric heating cooker, and more particularly to a gas-fired energy-saving steamer for steaming food. Background Technology

[0002] Traditional steamers typically use bottom-heated water to generate steam, which then steams the food as it rises. This method suffers from slow steam generation, low thermal efficiency, and significant heat loss. Furthermore, improper water level control during steaming can easily lead to dry burning, posing a safety hazard. While some existing electric steamers incorporate anti-dry-burning features, their complex structure results in relatively low steam generation efficiency and high energy consumption, failing to meet the demands of homes and restaurants for efficient and energy-saving steaming equipment. Therefore, there is an urgent need for a steaming device that can quickly generate steam, has high thermal efficiency, is safe to use, and is easy to maintain. Utility Model Content

[0003] The purpose of this utility model is to provide a gas-fired energy-saving steamer in order to solve the problems mentioned in the background.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a gas-fired energy-saving steamer, comprising a pot body and a steam generating device. The steam generating device includes a steam generating pipe vertically installed at the bottom of the pot body. A waterproof hollow heating cavity is provided on the outer wall of the steam generating pipe, and a flame hot airflow heating coil is coiled inside the hollow heating cavity. It also includes a burner and an induced draft fan. The burner is located at the lower end of the flame hot airflow heating coil, and is connected to a gas pipe and can ignite the gas supplied by the gas pipe via an electric ignition device to achieve combustion. The air inlet pipe of the induced draft fan is connected to the upper end of the flame hot airflow heating coil, and the air outlet of the induced draft fan extends out of the pot body and is connected to the outside. A water inlet is provided at the bottom of the side wall of the steam generating pipe, and the pot body and the inner cavity of the steam generating pipe are connected through the water inlet. After the induced draft fan is turned on, it can draw the hot airflow from the flame through the negative pressure of the air inlet pipe to heat the upper end of the heating coil, so that the flame and hot airflow generated by the burner can continuously enter the hot airflow heating coil to heat the water in the steam generating pipe and generate steam.

[0005] Preferably, the flame hot airflow heating coil is coiled tightly against the inner wall of the steam generating pipe, and a gap of 0.5-1.5cm is left between the flame hot airflow heating coil and the outer wall of the steam generating pipe.

[0006] Preferably, the exhaust end of the induced draft fan is in the form of a coil, which is coiled around the bottom of the pot body to preheat the water inside the pot.

[0007] Preferably, the flame end of the burner faces the flame hot airflow heating coil, and the burner and the flame hot airflow heating coil are connected in a non-sealed manner.

[0008] Preferably, it further includes a steam outlet device, which is disposed above the steam outlet of the steam generating pipe and includes a steam cone shroud for concentrating and guiding steam and a steam distribution plate for uniformly distributing steam; the steam cone shroud is funnel-shaped, with its large diameter end facing upwards and its small diameter end inserted into the upper end of the steam generating pipe; the steam distribution plate is disposed above the large diameter end of the steam cone shroud.

[0009] Preferably, it also includes a control section, which includes an induced draft fan switch and a gas electric ignition switch. The induced draft fan switch is electrically connected to and controls the start and stop of the induced draft fan; the gas electric ignition switch can control the start and stop of the electric ignition device; and a gas switch is provided on the gas pipe.

[0010] Preferably, the pot body is also equipped with a thermostat with a 200°C anti-dry-burning function, and the thermostat is connected to the gas switch.

[0011] Preferably, the bottom of the steam generating pipe is provided with a detachable stopcock or valve at the connection between it and the pot body.

[0012] Preferably, the steam distribution plate has multiple evenly distributed air outlet holes.

[0013] Preferably, the pot body is provided with a maximum water level line and a minimum water level line.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. Rapid steam generation and high thermal efficiency: By setting up an independent steam generating pipe and a flame hot air flow heating coil around its outside, the water inside the pipe is heated efficiently, which greatly improves the steam generation speed and thermal utilization efficiency, resulting in significant energy saving.

[0015] 2. Reasonable structure and safe and reliable: It is equipped with an anti-dry burning thermostat and water level indicator, which can effectively prevent dry burning and ensure safe use; the bottom of the steam generating pipe has a detachable structure, which is convenient for cleaning and maintenance and extends service life.

[0016] 3. Uniform steam distribution and good steaming effect: The combination structure of steam cone hood and steam distribution plate realizes the concentrated guidance and uniform spraying of steam, ensuring that the food is heated evenly and improving the steaming quality.

[0017] 4. Heat recovery and utilization, energy saving and environmental protection: The steam cone hood can collect condensate and return it to the steam generating pipe for secondary heating, reducing heat loss and water waste, and further improving energy efficiency.

[0018] 5. Wide range of applications and easy operation: It is suitable for various scenarios such as home and catering, and has functions such as induced draft fan control and gas ignition. It is simple to operate and easy to promote and use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model; In the diagram: 1. Boiler body; 101. Highest water level line; 102. Lowest water level line; 2. Steam generating pipe; 3. Flame hot air flow heating coil; 4. Water inlet; 5. Steam cone hood; 6. Steam distribution plate; 7. Plug; 8. Steamer basket; 10. Exhaust fan; 11. Burner; 12. Gas pipe. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0021] Please see Figure 1 In this embodiment of the present invention, a gas-fired energy-saving steamer includes a pot body 1 and a steam generating device. The steam generating device includes a steam generating pipe 2 vertically arranged at the bottom of the pot body 1. The outer wall of the steam generating pipe 2 is provided with a waterproof hollow heating cavity, and a flame hot air flow heating coil 3 is coiled in the hollow heating cavity. The steam generating device also includes a burner 11 and an induced draft fan 10. The burner 11 is located at the lower end of the flame hot air flow heating coil 3. The burner 11 is connected to a gas pipe 12 and can ignite the gas transported by the gas pipe 12 through an electric ignition device to achieve combustion. The air inlet pipe of the induced draft fan 10 is connected to the upper end of the flame hot air flow heating coil 3, and the air outlet of the induced draft fan 10 extends out of the pot body 1 and is connected to the outside. A water inlet 4 is opened at the bottom of the side wall of the steam generating pipe 2, and the inner cavity of the pot body 1 and the steam generating pipe 2 are connected through the water inlet 4.

[0022] like Figure 1 As shown, the flame hot airflow heating coil 3 is coiled tightly against the inner wall of the steam generating pipe 2, with a gap of 0.5-1.5cm between the flame hot airflow heating coil 3 and the outer wall of the steam generating pipe 2. The gap is preferably 1cm. The gap allows the heat energy of the flame hot airflow heating coil 3 to radiate inward to heat the water in the steam generating pipe 2, reducing heat loss to the outside.

[0023] The flame end of the burner 11 faces the flame hot airflow heating coil 3, and the burner 11 and the flame hot airflow heating coil 3 are connected in a non-sealed manner. This arrangement allows the flame generated by the burner 11 at the rear end to be drawn into the flame hot airflow heating coil 3 along with the surrounding airflow when the induced draft fan 10 is performing airflow suction at the front end, so as to carry out heating operations.

[0024] like Figure 1 As shown, this embodiment also includes a steam outlet device, which is disposed above the steam outlet of the steam generating pipe 2. The steam outlet device includes a steam conical hood 5 for concentrating and guiding steam, and a steam distribution plate 6 for uniformly distributing steam. The steam conical hood 5 is funnel-shaped, with its large-diameter end facing upwards, and its small-diameter end inserted into the upper end of the steam generating pipe 2. The steam distribution plate 6 is disposed above the large-diameter end of the steam conical hood 5. The steam distribution plate 6 has multiple evenly distributed steam outlet holes.

[0025] It also includes a control section, which includes an induced draft fan switch and a gas electric ignition switch. The induced draft fan switch is electrically connected to and controls the start and stop of the induced draft fan 10; the gas electric ignition switch can control the start and stop of the electric ignition device; and a gas switch is provided on the gas pipe 12.

[0026] The pot body 1 is also equipped with a thermostat with a 200℃ anti-dry-burning function, which is connected to the gas switch. In the event of dry burning, the gas switch can be turned off immediately using the thermostat, at which point the flame will be extinguished, and only airflow needs to be introduced to cool the steam generating pipe 2.

[0027] The bottom of the steam generating pipe 2 is equipped with a removable stopcock 7 or valve at the connection between it and the boiler body 1. This structure allows for the cleaning of scale inside the steam generating pipe 2 by removing the stopcock 7 or valve.

[0028] The pot body 1 is equipped with a maximum water level line 101 and a minimum water level line 102.

[0029] The method of using this utility model is as follows: The pot 1 of the gas-fired energy-saving steamer is filled with water, which enters the inner cavity of the steam generating pipe 2 through the water inlet 4 using the principle of communicating vessels. First, the gas switch is turned on, and the burner is ignited using the gas electric ignition switch. Then, the induced draft fan 10 is turned on, which draws in hot air from the flame through the air inlet pipe to the upper end of the heating coil 3. This allows the flame generated by the burner 11 and the surrounding hot air to continuously enter the heating coil 3, heating the water in the steam generating pipe 2 and generating steam. Because the heat energy from the heating coil 3 can quickly heat the water in the steam generating pipe 2, steam is generated rapidly. The rising steam is concentrated and guided by the steam cone hood 5, and then evenly sprayed out through the steam distribution plate 6 to steam the food in the upper steamer 8.

[0030] The steam cone hood 5 can collect the condensate during the heating process and return it to the steam generating pipe 2. The heat of the condensate will not be lost, but will be reheated and turned into steam again, thus saving water while recovering and reusing heat energy. Example 2

[0031] In this embodiment, the air outlet of the induced draft fan 10 is in the form of a coil, which is coiled around the bottom of the pot body 1 and can preheat the water inside the pot.

[0032] The other structures and implementation methods of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A gas-fired energy-saving steamer, comprising a pot body (1), characterized in that: It also includes a steam generating device, which includes a steam generating pipe (2) vertically installed at the bottom of the pot body (1). The outer wall of the steam generating pipe (2) is provided with a waterproof hollow heating cavity, and a flame hot air flow heating coil (3) is coiled in the hollow heating cavity. It also includes a burner (11) and an induced draft fan (10). The burner (11) is installed at the lower end of the flame hot air flow heating coil (3). The burner (11) is connected to a gas pipe (12) and can ignite the gas supplied by the gas pipe (12) through an electric ignition device to realize combustion operation. The air inlet pipe of the induced draft fan (10) is connected to the upper end of the flame hot air flow heating coil (3). The air outlet of the induced draft fan (10) passes through the pot body (1) and is connected to the outside. A water inlet (4) is opened at the bottom of the side wall of the steam generating pipe (2). The pot body (1) and the inner cavity of the steam generating pipe (2) are connected through the water inlet (4).

2. The gas-fired energy-saving steamer according to claim 1, characterized in that: The flame hot air flow heating coil (3) is coiled tightly against the inner wall of the steam generating pipe (2), and a gap of 0.5-1.5cm is left between the flame hot air flow heating coil (3) and the outer wall of the steam generating pipe (2).

3. A gas-fired energy-saving steamer according to claim 1, characterized in that: The exhaust end of the induced draft fan (10) is in the form of a coil, which is coiled around the bottom of the pot body (1).

4. A gas-fired energy-saving steamer according to claim 1, characterized in that: The flame end of the burner (11) faces the flame hot airflow heating coil (3), and the burner (11) and the flame hot airflow heating coil (3) are connected in a non-sealed manner.

5. A gas-fired energy-saving steamer according to claim 1, characterized in that: It also includes a steam outlet device, which is located above the steam outlet of the steam generating pipe (2), including a steam cone hood (5) for concentrating and guiding steam and a steam distribution plate (6) for uniformly distributing steam; the steam cone hood (5) is funnel-shaped, with the large diameter end of the steam cone hood (5) facing upwards, and the small diameter end of the steam cone hood (5) inserted into the upper end of the steam generating pipe (2); the steam distribution plate (6) is located above the large diameter end of the steam cone hood (5).

6. A gas-fired energy-saving steamer according to claim 1, characterized in that: It also includes a control section, which includes an induced draft fan switch and a gas electric ignition switch. The induced draft fan switch is electrically connected to and controls the opening and closing of the induced draft fan (10); the gas electric ignition switch can control the opening and closing of the electric ignition device; and a gas switch is provided on the gas pipe (12).

7. A gas-fired energy-saving steamer according to claim 1, characterized in that: The pot body (1) is also equipped with a thermostat with a 200℃ anti-dry burning function, which is connected to the gas switch.

8. A gas-fired energy-saving steamer according to claim 1, characterized in that: The bottom of the steam generating pipe (2) is provided with a removable stopcock (7) or valve at the connection between it and the pot body (1).

9. A gas-fired energy-saving steamer according to claim 5, characterized in that: The steam distribution plate (6) has multiple evenly distributed air outlet holes.

10. A gas-fired energy-saving steamer according to claim 1, characterized in that: The pot body (1) is equipped with a maximum water level line (101) and a minimum water level line (102).

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