Steaming exhaust structure and electric steamer having the same

Abstract

The present invention relates to a steaming exhaust structure and an electric steamer, comprising an inner pot and a heat dissipation channel, a condensation chamber is arranged above the heat dissipation channel, the steam inlet of the condensation chamber is fluidly connected with the steam exhaust port of the inner pot, the top wall of the condensation chamber is a first heat dissipation plate and the bottom wall is a second heat dissipation plate, and the second heat dissipation plate is shared with the top wall of the heat dissipation channel, and a partition is arranged transversely in the heat dissipation channel along the direction from the air inlet to the air outlet, the partition divides the heat dissipation channel into a first air duct and a second air duct from top to bottom, and the second heat dissipation plate is located in the first air duct. The present invention can improve the condensation effect of high-temperature steam entering the condensation chamber by setting up double heat dissipation plates. In addition, the heat transferred from the steam in the condensation chamber to the second heat dissipation plate can be taken away by the first air duct, so that the second heat dissipation plate can maintain a relatively low temperature, thereby ensuring the continuous condensation effect of the second heat dissipation plate on the steam, and improving the overall condensation effect of the condensation chamber on the steam.

Description

Technical Field

[0001] The invention relates to the field of electric steamers, and in particular to a steaming exhaust structure and an electric steamer having the structure. Background Art

[0002] An electric steamer is an electrical device that uses high-temperature steam to cook food. During the cooking process, excess steam is discharged through an exhaust channel. The exhaust channel of an existing electric steamer is generally provided with a condensation chamber structure, and the discharged steam condenses in the condensation chamber. On the one hand, it can reduce the amount of discharged steam, and on the other hand, it can return the condensed water to the inner tank or the external steam generator for re-evaporation to achieve the recycling of the condensed water. For example, a Chinese invention patent with application number CN201810615563.X (application publication number CN110604477A) discloses a steam exhaust structure, including an inner tank with a steam inlet and a steam outlet, and also including a condensation chamber with an air inlet and an air outlet, the air inlet is fluidly connected to the above-mentioned steam outlet, and a pressure check valve is provided on the above-mentioned air outlet.

[0003] The top of the condensing chamber of the existing electric steamer is generally equipped with a stainless steel heat sink. After the high-temperature steam enters the condensing chamber, it contacts the heat sink and is cooled and condensed. The generated condensed water flows back to the inner tank or the external steam generator through the conduit, and then reheats to form water vapor. However, the heat sink of the existing condensing chamber is effective in cooling the steam. After the electric steamer has been working for 3 to 4 minutes, the heat sink quickly heats up to a higher temperature, thereby greatly reducing its condensation effect on the steam. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a steaming exhaust structure with good steam condensation effect in view of the prior art.

[0005] The second technical problem to be solved by the present invention is to provide a steaming exhaust structure capable of recycling condensed water in view of the prior art.

[0006] The third technical problem to be solved by the present invention is to provide a steaming exhaust structure with low noise in view of the prior art.

[0007] The fourth technical problem to be solved by the present invention is to provide an electric steamer with the above-mentioned steaming exhaust structure in view of the prior art.

[0008] The technical solution adopted by the present invention to solve at least one of the above technical problems is: a steaming exhaust structure, including an inner pot and a heat dissipation channel arranged above the inner pot and having a heat dissipation fan, a condensation chamber is arranged above the heat dissipation channel, and the steam inlet of the condensation chamber is fluidly connected with the steam exhaust port of the above-mentioned inner pot, and is characterized in that the top wall of the condensation chamber is a first heat dissipation plate and the bottom wall is a second heat dissipation plate, and the second heat dissipation plate is shared with the top wall of the above-mentioned heat dissipation channel, the above-mentioned heat dissipation fan is installed on the air inlet of the heat dissipation channel, and a partition is horizontally arranged in the heat dissipation channel along the direction from the air inlet to the air outlet, the partition divides the heat dissipation channel into a first air duct and a second air duct up and down, and the above-mentioned second heat dissipation plate is located in the first air duct.

[0009] Furthermore, the first air duct can be opened and closed, and when the temperature of the second heat sink is lower than a preset temperature, the first air duct is closed, and when the temperature of the second heat sink reaches the preset temperature, the second air duct is opened. By opening and closing the first air duct, on the one hand, when the temperature of the second heat sink is relatively low, by closing the first air duct, the exhaust gas entering the heat sink can be concentrated and discharged through the second air duct, thereby increasing the exhaust speed (increasing the air pressure inside the heat sink by reducing the exhaust area, thereby accelerating the exhaust speed). On the other hand, when the temperature of the second heat sink is relatively high, by opening the first channel, the second heat sink can be cooled down, thereby ensuring its continuous condensation effect on steam.

[0010] Furthermore, the partition includes a movable plate at the front end and a fixed plate behind the movable plate along the airflow direction of the heat dissipation channel, and the rear end of the movable plate is rotatably connected to the front end of the fixed plate, and when the front end of the movable plate rotates to abut against the inner top surface of the heat dissipation channel, the first air duct is closed, and when the front end of the movable plate is separated from the inner top surface of the heat dissipation channel, the first air duct is opened. In this way, the first air duct can be opened and closed by rotating the movable plate relative to the fixed plate, and the structure is simple and easy to control.

[0011] Furthermore, the partition is arranged horizontally, and when the movable plate is rotated to a horizontal state relative to the fixed plate, the first air duct is fully opened. Since the heat dissipation fan discharges air horizontally, the partition is arranged horizontally to avoid forming resistance to the air discharge of the heat dissipation fan, and when the first air duct is fully opened, the maximum air intake of the first air duct and the second air duct can be respectively guaranteed.

[0012] Furthermore, a thermally conductive elastic reset member is disposed in the first air duct. When the temperature of the second heat sink is lower than a preset temperature, the elastic reset member applies an upward pulling force to the movable plate, and when the temperature of the second heat sink is higher than a preset temperature, the elastic reset member applies a downward thrust to the movable plate. In this way, the movable plate can feedback the temperature change of the second heat sink and rotate relative to the fixed plate through the elastic reset member, thereby realizing the opening and closing of the first air duct relative to the temperature change of the second heat sink.

[0013] Furthermore, the elastic reset member can be implemented in a variety of specific ways. Preferably, the elastic reset member is a coil spring, one end of which is connected to the second heat sink, and the other end is connected to the movable plate. In this way, when the temperature of the second heat sink is low, the coil spring contracts and pulls the movable plate upward, and the movable plate rotates upward relative to the fixed plate to close the first air duct. When the temperature of the second heat sink is high, the coil spring expands and pushes the movable plate downward, and the movable plate rotates downward relative to the fixed plate to close the first air duct.

[0014] Furthermore, the rear end of the partition along the airflow direction of the heat dissipation channel is located in front of the air outlet of the heat dissipation channel. In this way, the air outlets of the first air duct and the second air duct can be mixed before flowing to the air outlet of the heat dissipation channel, which can reduce the external exhaust temperature of the condensed residual steam on the one hand, and eliminate the temperature difference of the air outlets of the two on the other hand, so as to avoid the airflow at the air outlet of the heat dissipation channel from forming turbulence due to the temperature difference between the upper and lower parts, thereby affecting the user experience.

[0015] Furthermore, the partition has a guide slope inclined downward from front to back on the inner top surface of the heat dissipation channel on the rear side along the air flow direction of the heat dissipation channel, so that under the action of the guide slope, the outlet air of the first air duct and the second air duct can be fully mixed in the corresponding area of ​​the heat dissipation channel corresponding to the guide slope, thereby further eliminating the temperature difference between the outlet air of the first air duct and the second air duct.

[0016] Furthermore, the front end of the guide slope along the airflow direction of the heat dissipation channel is aligned with the rear end of the partition plate, and there is a certain distance between the rear end of the guide slope and the air outlet of the heat dissipation channel. On the one hand, the air outlets of the first air duct and the second air duct can be better mixed, and on the other hand, the influence of the deceleration mixed flow of the first air duct and the second air duct on the air outlet of the heat dissipation channel can be minimized.

[0017] Furthermore, a steam outlet is provided on the upper part of the condensation chamber, and the steam outlet is connected to the steam outlet on the heat dissipation channel through a steam conduit, so that the uncondensed steam in the condensation chamber can enter the heat dissipation channel through the steam conduit and be discharged through the heat dissipation channel.

[0018] Furthermore, the heat dissipation fan includes a volute cover and a centrifugal impeller installed in the volute cover, and the steam vent is provided on the side wall of the volute cover. In this way, the remaining steam in the condensation chamber blown out by the steam vent can quickly enter the heat dissipation channel.

[0019] Furthermore, the steam vent is provided at the air outlet section of the volute cover, thereby further increasing the speed at which the remaining steam in the condensation chamber enters the heat dissipation channel, thereby accelerating the exhaust speed of the heat dissipation channel.

[0020] Furthermore, the steam vent is opposite to the second air duct, so that the remaining steam in the condensation chamber can be discharged through the second air duct, thereby preventing the remaining steam from entering the first air duct and causing the temperature rise of the second heat sink, thereby affecting the condensation effect of the second heat sink on the steam.

[0021] Furthermore, heat dissipation fins are arranged on the lower surface of the second heat dissipation plate, and the heat dissipation fins can carry the heat of the second heat dissipation plate, thereby improving the condensation effect of the second heat dissipation plate on steam.

[0022] Furthermore, the heat dissipation fins are arranged on the lower surface of the second heat dissipation plate and along the airflow direction of the heat dissipation channel, each heat dissipation fin extends in a direction perpendicular to the lower surface of the second heat dissipation plate, and heat dissipation gaps for airflow to pass through are formed between each adjacent heat dissipation fin. In this way, the heat dissipation area of ​​each heat dissipation fin is increased, and the heat dissipation of the second heat dissipation plate is accelerated, thereby further improving the condensation effect of the second heat dissipation plate on steam.

[0023] Furthermore, the inner bottom surface of the condensation chamber is concave downward, and the steam inlet is provided at the side wall of the condensation chamber adjacent to the lowest point of the inner bottom surface of the condensation chamber. In this way, the condensed water formed in the condensation chamber can flow back into the inner tank along the inner bottom surface of the condensation chamber through the steam inlet and the steam outlet of the inner tank, and then be reheated and evaporated by the heating device on the bottom wall of the inner tank, thereby realizing the recycling of the condensed water.

[0024] Furthermore, the steam exhaust port of the inner pot includes a first steam exhaust hole for discharging steam and a second steam exhaust hole located below the first steam exhaust hole. In this way, the excess steam in the inner pot is discharged through the first steam exhaust hole, and the condensed water formed in the condensation chamber flows back into the inner pot through the second steam exhaust hole. The steam discharge is separated from the condensed water return, so as to avoid the steam impacting the condensed water and generating noise, thereby reducing the overall noise of the electric steamer when working.

[0025] Furthermore, the hole area of ​​the first steam exhaust hole is larger than that of the second steam exhaust hole, so as to ensure the exhaust efficiency of the inner tank, and the exhaust port is covered with a steam exhaust cover, and the lower end of the steam exhaust cover is provided with a water guide slope opposite to the second steam exhaust hole and inclined inward from top to bottom, and the top of the steam exhaust cover is provided with a steam guide port, which is connected to the steam inlet of the condensing chamber through a steam guide pipe. The steam exhaust cover can realize the connection between the steam guide pipe and the steam exhaust port on the one hand, and the condensed water flowing into the steam guide pipe can be guided to the second steam exhaust hole on the other hand, so as to better realize the phase separation of steam discharge and condensed water reflux in the steam exhaust port.

[0026] The technical solution adopted to further solve the fourth technical problem is: an electric steamer with the steaming exhaust structure as described above.

[0027] Compared with the prior art, the advantages of the present invention are as follows: the first heat sink and the second heat sink are respectively arranged in the condensation chamber of the present invention, which can improve the condensation effect of the high-temperature steam entering the condensation chamber compared with the existing condensation chamber structure with a single heat sink. In addition, the heat dissipation channel is divided into the first air duct and the second air duct by the partition plate, so that the cold air blown out by the heat dissipation fan can enter the first air duct and the second air duct respectively, thereby taking away the heat transferred from the steam in the condensation chamber to the second heat sink, so that the second heat sink can maintain a relatively low temperature, thereby ensuring the continuous condensation effect of the second heat sink on the steam, and improving the overall condensation effect of the condensation chamber on the steam.

[0028] It can be seen that the first air duct and the second air duct of the present invention do not need to be separately provided with a fan. The air outlet of the same heat dissipation fan can simultaneously realize the mixed discharge of the condensed residual steam and the reduction of the heat dissipation of the second heat dissipation plate, so that the condensation chamber can continue to maintain the condensation effect of the steam during the cooking process of the electric steamer. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the steaming exhaust structure in Example 1 of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the inner container in Example 1 of the present invention;

[0031] Figure 3 It is a partial structural schematic diagram of the steaming exhaust structure in Example 1 of the present invention;

[0032] Figure 4 This is a schematic structural diagram of the air guide plate in Embodiment 1 of the present invention;

[0033] Figure 5 A partial cross-sectional view of the air guide plate in Example 1 of the present invention;

[0034] Figure 6It is a partial cross-sectional view of the steaming exhaust structure in Example 1 of the present invention;

[0035] Figure 7 It is a partial cross-sectional view of the air guide plate in the second embodiment of the invention;

[0036] Figure 8 It is a partial cross-sectional view of the steaming exhaust structure in Example 2 of the present invention (when the first air duct is closed);

[0037] Fig. 9 It is a partial cross-sectional view of the steaming exhaust structure in Example 2 of the present invention in another state (when the first air duct is open). DETAILED DESCRIPTION

[0038] The present invention is further described in detail below with reference to the accompanying drawings.

[0039] Embodiment 1:

[0040] like Figures 1 to 6 As shown, an electric steamer includes a steaming exhaust structure, which includes an inner tank 1, an upper mounting plate 2 is arranged above the inner tank 1, and an air guide plate 3 is covered on the upper mounting plate 2, and a heat dissipation channel 30 is surrounded between the air guide plate 3 and the upper surface of the upper mounting plate 2, and a square condensation cover 6 is covered on the air guide plate 3, and the condensation cover 6 and the upper surface of the air guide plate 3 form a condensation chamber 60, wherein the steam inlet 63 of the above-mentioned condensation chamber 60 is fluidly connected with the steam exhaust port 11 of the above-mentioned inner tank 1 (the phase fluid connection here can be realized in a variety of ways: when the steam inlet 63 of the condensation chamber 60 and the steam exhaust port 11 of the inner tank 1 are adjacent to each other, the two can be directly connected, which is not shown; and when the steam inlet 63 of the condensation chamber 60 is far away from the steam exhaust port 11 of the inner tank 1, the two can be connected through a pipeline, such as Figure 1 As shown; the meaning of the phase fluid communication described below in this embodiment is the same as this and will not be repeated). In the present invention, the heat dissipation channel 30 is arranged along the front-to-back direction, and its air inlet 301 end is the front end, and the air outlet 302 end is the rear end. The following description of the front-to-back direction is all of this meaning and will not be repeated.

[0041] Furthermore, the top wall of the condensation chamber 60 (i.e., the top plate of the condensation hood 6) is a first heat dissipation plate 61 and the bottom wall is a second heat dissipation plate 62, and the second heat dissipation plate 62 is shared with the top wall of the heat dissipation channel 30 (i.e., the top wall of the wind guide plate 3), and the heat dissipation fan 31 is installed on the air inlet 301 of the heat dissipation channel 30, and a partition 4 is horizontally arranged in the heat dissipation channel 30 along the direction from the air inlet 301 to the air outlet 302, and the partition 4 divides the heat dissipation channel 30 into a first air duct 30A and a second air duct 30B from top to bottom, and the second heat dissipation plate 62 is located in the first air duct 30A. Thus, in this embodiment, the first heat sink 61 and the second heat sink 62 are respectively provided in the condensation chamber 60. Compared with the existing condensation chamber structure with a single heat sink, the condensation effect of the high-temperature steam entering the condensation chamber 60 can be improved. Moreover, since the steam has the characteristic of rising upward, the temperature rise rate of the second heat sink 62 is lower than that of the first heat sink 61, and the second heat sink 62 has a better continuous condensation ability for steam than the first heat sink 61. In addition, the heat dissipation channel 30 is divided into the first air duct 30A and the second air duct 30B by the partition 4, so that the cold air blown by the heat dissipation fan 31 can enter the first air duct 30A and the second air duct 30B respectively, thereby taking away the heat transferred from the steam in the condensation chamber 60 to the second heat sink 62, so that the second heat sink 62 can maintain a relatively low temperature, thereby ensuring the continuous condensation effect of the second heat sink 62 on the steam, and improving the overall condensation effect of the condensation chamber 60 on the steam. In this embodiment, the partition plate 4 is horizontally arranged, and the front end of the partition plate 4 is adjacent to the air inlet 301 of the heat dissipation channel 30 , so as to better divert the air outflow of the heat dissipation fan 31 .

[0042] In this embodiment, a heat dissipation fin 71 is provided on the lower surface of the second heat dissipation plate 62, and the heat dissipation fin 71 can carry the heat of the second heat dissipation plate 62, thereby improving the condensation effect of the second heat dissipation plate 62 on steam. Further, the heat dissipation fin 71 is arranged on the lower surface of the second heat dissipation plate 62 and arranged along the airflow direction of the heat dissipation channel 30, and each heat dissipation fin 71 extends along the vertical direction of the lower surface of the second heat dissipation plate 62, and a heat dissipation gap (not shown) for airflow to pass through is formed between each adjacent heat dissipation fin 71. In this way, by increasing the heat dissipation area of ​​each heat dissipation fin 71, the heat dissipation of the second heat dissipation plate 62 is accelerated, thereby further improving the condensation effect of the second heat dissipation plate 62 on steam. In this embodiment, the first heat dissipation plate 61 and the second heat dissipation plate 62 are both made of stainless steel, and each heat dissipation fin 71 is made of aluminum alloy. Preferably, in this embodiment, the above-mentioned heat dissipation fins 71 are installed on a mounting plate 72 parallel to the above-mentioned second heat dissipation plate 62, and the mounting plate 72 is also made of a heat-conductive material (specifically, an aluminum alloy material), thereby facilitating the installation of each heat dissipation fin 71.

[0043] Furthermore, the inner bottom surface of the condensation chamber 60 is concave downward, and the above-mentioned steam inlet 63 is provided at the side wall of the condensation chamber 60 adjacent to the lowest point of its inner bottom surface. In this way, the condensed water formed in the condensation chamber 60 can flow back into the inner tank 1 along the inner bottom surface of the condensation chamber 60 through the steam inlet 63 and the steam outlet 11 of the inner tank 1, and then reheat and evaporate through the heating device on the bottom wall of the inner tank 1 (in this embodiment, a heating plate installed on the bottom wall of the inner tank 1, not shown), so as to realize the recycling of the condensed water. In this embodiment, the above-mentioned second heat sink 62 is bent, and its front end is inclined downward from front to back, while the rear end is inclined downward from front to back, so that the inner bottom surface of the condensation chamber 60 is concave downward.

[0044] Furthermore, the steam exhaust port 11 of the inner pot 1 includes a first steam exhaust hole 111 for discharging steam and a second steam exhaust hole 112 located below the first steam exhaust hole 111. In this way, the excess steam in the inner pot 1 is discharged through the first steam exhaust hole 111, and the condensed water formed in the condensation chamber 60 flows back into the inner pot 1 through the second steam exhaust hole 112. The steam discharge is separated from the condensed water return, so as to avoid the steam impacting the condensed water and generating noise, thereby reducing the overall noise of the electric steamer when working. Preferably, the hole area of ​​the first steam exhaust hole 111 is larger than the second steam exhaust hole 112, so as to ensure the exhaust efficiency of the inner tank 1, and the steam exhaust port 11 is covered with a steam exhaust cover 82, and the lower end of the steam exhaust cover 82 is provided with a water guide slope 821 opposite to the second steam exhaust hole 112 and inclined inward from top to bottom, and the top of the steam exhaust cover 82 is provided with a steam guide port 822, and the steam guide port 822 is connected to the steam inlet 63 of the condensation chamber 60 through the steam guide pipe 81. On the one hand, the steam exhaust cover 82 can realize the connection between the steam guide pipe 81 and the steam exhaust port 11, and on the other hand, the condensed water flowing into the steam guide pipe 81 can be guided to the second steam exhaust hole 112 through the water guide slope 821 on the steam exhaust cover 82, so as to better realize the phase separation of steam discharge and condensed water reflux in the steam exhaust port 11.

[0045] In addition, a steam outlet 64 is provided on the upper part of the condensation chamber 60, and the steam outlet 64 is connected to the steam vent 32 on the heat dissipation channel 30 through the steam vent 9. In this way, the uncondensed steam in the condensation chamber 60 can enter the heat dissipation channel 30 through the steam vent 9, and be discharged through the heat dissipation channel 30. The heat dissipation fan 31 includes a volute cover 311 and a centrifugal impeller 312 installed in the volute cover 311. The steam vent 32 is provided on the side wall of the volute cover 311, so that the remaining steam in the condensation chamber 60 blown out by the steam vent 32 can quickly enter the heat dissipation channel 30. Preferably, the steam vent 32 is provided in the air outlet section of the volute cover 311, so as to further increase the speed at which the remaining steam in the condensation chamber 60 enters the heat dissipation channel 30, thereby accelerating the exhaust speed of the heat dissipation channel 30. Further preferably, the steam vent 32 is opposite to the above-mentioned second air duct 30B, so that the remaining steam in the condensation chamber 60 can be discharged through the second air duct 30B, avoiding the remaining steam from entering the first air duct 30A and causing the temperature rise of the second heat sink 62, thereby affecting the condensation effect of the second heat sink 62 on the steam.

[0046] In addition, in this embodiment, the partition 4 is located along the rear end of the heat dissipation channel 30 in front of the air outlet 302 of the heat dissipation channel 30. In this way, the air outlets of the first air duct 30A and the second air duct 30B can be mixed before flowing to the air outlet 302 of the heat dissipation channel 30. On the one hand, the external discharge temperature of the condensed residual steam can be reduced to avoid scalding the user by the high-temperature gas discharged externally. On the other hand, the temperature difference between the two air outlets can be eliminated to avoid the airflow at the air outlet 302 of the heat dissipation channel 30 from forming turbulence due to the upper and lower temperature difference, thereby affecting the user's experience. In this embodiment, the temperature of the condensed residual steam after mixing with the cold air in the second air duct 30B can reach below 70°C, and the airflow temperature after mixing the air outlets of the first air duct 30A and the second air duct 30B can reach below 60°C.

[0047] Furthermore, the partition 4 has a guide slope 300 on the inner top surface of the heat dissipation channel 30 on the rear side along the airflow direction of the heat dissipation channel 30, which is inclined downward from front to back. In this way, under the action of the guide slope 300, the air outlets of the first air duct 30A and the second air duct 30B can be fully mixed in the corresponding area of ​​the heat dissipation channel 30 corresponding to the guide slope 300, thereby further eliminating the temperature difference between the air outlets of the first air duct 30A and the second air duct 30B. Preferably, the front end of the guide slope 300 along the airflow direction of the heat dissipation channel 30 is aligned with the rear end of the partition 4, and there is a certain distance between the rear end of the guide slope 300 and the air outlet 302 of the heat dissipation channel 30. On the one hand, the air outlets of the first air duct 30A and the second air duct 30B can be better mixed, and on the other hand, the influence of the deceleration mixed flow of the first air duct 30A and the second air duct 30B on the air outlet of the heat dissipation channel 30 can be minimized.

[0048] Embodiment 2:

[0049] like Figures 7 to 9 As shown, different from the first embodiment, the first air duct 30A in this embodiment can be opened and closed, and when the temperature of the second heat sink 62 is lower than the preset temperature (in this embodiment, the preset temperature is the upper limit temperature at which the second heat sink 62 cannot condense steam), the first air duct 30A is closed, and when the temperature of the second heat sink 62 is higher than the preset temperature, the second air duct 30B is opened. Through the opening and closing of the first air duct 30A, on the one hand, when the temperature of the second heat sink 62 is relatively low, the closing of the first air duct 30A can make the exhaust gas entering the heat sink 30 be concentrated and discharged through the second air duct 30B, thereby increasing the exhaust speed (increasing the air pressure inside the heat sink 30 by reducing the exhaust area, thereby accelerating the exhaust speed). On the other hand, when the temperature of the second heat sink 62 is relatively high, the opening of the first channel can achieve the cooling of the second heat sink 62, thereby ensuring its continuous condensation effect on steam.

[0050] Specifically, the partition 4 includes a movable plate 41 at the front end and a fixed plate 42 located behind the movable plate 41 along the airflow direction of the heat dissipation channel 30, and the rear end of the movable plate 41 is rotatably connected to the front end of the fixed plate 42, and when the front end of the movable plate 41 rotates to abut against the inner top surface of the heat dissipation channel 30, the first air duct 30A is closed, and when the front end of the movable plate 41 is separated from the inner top surface of the heat dissipation channel 30, the first air duct 30A is opened. In this way, the opening and closing of the first air duct 30A can be achieved by rotating the movable plate 41 relative to the fixed plate 42, and the structure is simple and easy to control. Preferably, the partition 4 is horizontally arranged, and when the movable plate 41 rotates to a horizontal state relative to the fixed plate 42, the first air duct 30A is fully opened. Since the heat dissipation fan 31 discharges air horizontally, the partition 4 is horizontally arranged to avoid forming resistance to the air discharge of the heat dissipation fan 31, and when the first air duct 30A is fully opened, the maximum air intake of the first air duct 30A and the second air duct 30B can be respectively guaranteed.

[0051] In this embodiment, in order to better realize the opening and closing of the first air duct 30A, a thermally conductive elastic reset member 5 is sandwiched in the first air duct 30A. When the temperature of the second heat sink 62 is lower than the preset temperature, the elastic reset member 5 applies an upward pulling force to the movable plate 41, and when the temperature of the second heat sink 62 is higher than the preset temperature, the elastic reset member 5 applies a downward thrust to the movable plate 41. In this way, the movable plate 41 can feedback the temperature change of the second heat sink 62 through the elastic reset member 5 and rotate relative to the fixed plate 42, thereby realizing the opening and closing of the first air duct 30A relative to the temperature change of the second heat sink 62. The elastic reset member 5 can be implemented in a variety of specific ways. Preferably, the elastic reset member 5 is a vertically arranged coil spring, the upper end of which is connected to the second heat sink 62, and the lower end is connected to the movable plate 41. In this way, when the temperature of the second heat sink 62 is low, the coil spring contracts and pulls the movable plate 41 upward, and the movable plate 41 rotates upward relative to the fixed plate 42 to close the first air duct 30A. When the temperature of the second heat sink 62 is high, the coil spring expands and pushes the movable plate 41 downward, and the movable plate 41 rotates downward relative to the fixed plate 42 to close the first air duct 30A.

[0052] The working process of this embodiment is as follows:

[0053] In the initial stage of cooking, the temperatures of the first heat sink 61 and the second heat sink 62 of the condensation chamber 60 are relatively low, so the steam entering the condensation chamber 60 can be better condensed. At this time, the first air duct 30A is closed, and the cold air blown out by the heat dissipation fan 31 and the remaining steam after condensation in the condensation chamber 60 are mixed and discharged outside the steamer through the second air duct 30B.

[0054] As cooking progresses, the temperature of the second heat sink 62 increases. At this time, the elastic reset member 5 expands due to the heat. The movable plate 41 moves downward under the push of the elastic reset member 5 to open the first air duct 30A. The cold air blown out by the heat dissipation fan 31 is split, one part of which is mixed with the remaining steam after condensation in the condensation chamber 60 and enters the second air duct 30B, and the other part enters the first air duct 30A, thereby achieving heat dissipation and cooling of the second heat sink 62 and each heat dissipation fin 71, thereby maintaining the heat dissipation effect of the second heat sink 62 on the steam, and then maintaining the condensation effect of the condensation chamber 60 on the steam.

[0055] It can be seen that the first air duct 30A and the second air duct 30B of the present invention do not need to be separately provided with a fan. The air discharge of the same heat dissipation fan 31 can simultaneously achieve the mixed discharge of the condensed residual steam and the reduction of the heat dissipation of the second heat dissipation plate 62, so that the condensation chamber can continue to maintain the condensation effect of the steam during the cooking process of the electric steamer.

Claims

1. A steaming exhaust structure, comprising an inner container (1) and a heat dissipation channel (30) arranged above the inner container (1) and having a heat dissipation fan (31), a condensation chamber (60) being arranged above the heat dissipation channel (30), a steam inlet (63) of the condensation chamber (60) being in fluid communication with a steam exhaust port (11) of the inner container (1), characterized in that: The top wall of the condensation chamber (60) is a first heat dissipation plate (61) and the bottom wall is a second heat dissipation plate (62), and the second heat dissipation plate (62) is shared with the top wall of the heat dissipation channel (30). The heat dissipation fan (31) is installed on the air inlet (301) of the heat dissipation channel (30), and a partition (4) is arranged in the heat dissipation channel (30) in a transverse direction from the air inlet (301) to the air outlet (302), and the partition (4) divides the heat dissipation channel (30) into a first air duct (30A) and a second air duct (30B) in upper and lower parts, and the second heat dissipation plate (62) is located in the first air duct (30A); The first air duct (30A) can be opened and closed, and when the temperature of the second heat dissipation plate (62) is lower than a preset temperature, the first air duct (30A) is closed, and when the temperature of the second heat dissipation plate (62) is higher than the preset temperature, the second air duct (30B) is opened; The partition plate (4) comprises a movable plate (41) located at the front end and a fixed plate (42) located behind the movable plate (41) along the airflow direction of the heat dissipation channel (30), and the rear end of the movable plate (41) is rotatably connected to the front end of the fixed plate (42), and when the front end of the movable plate (41) rotates to abut against the inner top surface of the heat dissipation channel (30), the first air channel (30A) is closed, and when the front end of the movable plate (41) is separated from the inner top surface of the heat dissipation channel (30), the first air channel (30A) is opened; The partition (4) is arranged horizontally, and when the movable plate (41) is rotated to a horizontal state relative to the fixed plate (42), the first air duct (30A) is fully opened; A thermally conductive elastic return member (5) is sandwiched in the first air duct (30A). When the temperature of the second heat sink (62) is lower than a preset temperature, the elastic return member (5) applies an upward pulling force to the movable plate (41); and when the temperature of the second heat sink (62) is higher than the preset temperature, the elastic return member (5) applies a downward pushing force to the movable plate (41).

2. The steaming exhaust structure according to claim 1, characterized in that: The elastic return member (5) is a coil spring, one end of which is connected to the second heat sink (62) and the other end of which is connected to the movable plate (41).

3. The steaming exhaust structure according to claim 1 or 2, characterized in that: The rear end of the partition plate (4) along the airflow direction of the heat dissipation channel (30) is located in front of the air outlet (302) of the heat dissipation channel (30).

4. The steaming exhaust structure according to claim 3, characterized in that: The partition plate (4) has a flow guiding inclined surface (300) on the inner top surface of the heat dissipation channel (30) at the rear side along the airflow direction of the heat dissipation channel (30) and inclined downward from front to back.

5. The steaming exhaust structure according to claim 4, characterized in that: The front end of the guide slope (300) along the airflow direction of the heat dissipation channel (30) is aligned vertically with the rear end of the partition (4), and there is a certain distance between the rear end of the guide slope (300) and the air outlet (302) of the heat dissipation channel (30).

6. The steaming exhaust structure according to claim 1 or 2, characterized in that: A steam outlet (64) is provided on the upper portion of the condensation chamber (60), and the steam outlet (64) is connected to the steam vent (32) on the heat dissipation channel (30) via a steam vent conduit (9).

7. The steaming exhaust structure according to claim 6, characterized in that: The heat dissipation fan (31) comprises a volute cover (311) and a centrifugal impeller (312) installed in the volute cover (311), and the steam vent (32) is provided on the side wall of the volute cover (311).

8. The steaming exhaust structure according to claim 7, characterized in that: The steam vent (32) is provided at the air outlet section of the volute cover (311).

9. The steaming exhaust structure according to claim 7, characterized in that: The steam vent (32) is opposite to the second air duct (30B).

10. The steaming exhaust structure according to claim 1 or 2, characterized in that: Heat dissipation fins (71) are provided on the lower surface of the second heat dissipation plate (62).

11. The steaming exhaust structure according to claim 10, characterized in that: The heat dissipation fins (71) are arranged on the lower surface of the second heat dissipation plate (62) and along the airflow direction of the heat dissipation channel (30); each heat dissipation fin (71) extends in a direction perpendicular to the lower surface of the second heat dissipation plate (62); and heat dissipation gaps for airflow to pass through are formed between adjacent heat dissipation fins (71).

12. The steaming exhaust structure according to claim 1 or 2, characterized in that: The inner bottom surface of the condensing chamber (60) is concave downward, and the steam inlet (63) is provided on the side wall of the condensing chamber (60) adjacent to the lowest point of the inner bottom surface of the condensing chamber (60).

13. The steaming exhaust structure according to claim 1 or 2, characterized in that: The steam exhaust port (11) of the inner container (1) comprises a first steam exhaust hole (111) for exhausting steam and a second steam exhaust hole (112) located below the first steam exhaust hole (111).

14. The steaming exhaust structure according to claim 13, characterized in that: The hole area of ​​the first steam exhaust hole (111) is larger than that of the second steam exhaust hole (112), and a steam exhaust cover (82) is provided on the steam exhaust hole (11), and a water guide slope (821) is provided at the lower end of the steam exhaust cover (82) which is opposite to the second steam exhaust hole (112) and is inclined inward from top to bottom, and a steam guide port (822) is provided at the top end of the steam exhaust cover (82), and the steam guide port (822) is connected to the steam inlet (63) of the condensing chamber (60) through a steam guide pipe (81).

15. An electric steamer having the steaming exhaust structure according to any one of claims 1 to 14.

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