Exhaust pressure-relief and condensation reflux device and pressure steam oven

Abstract

Embodiments of the preset application provide an exhaust pressure-relief and condensation reflux device and a pressure steam oven. The exhaust pressure-relief and condensation reflux device comprises: a pressure-relief condensation part, which comprises a housing and a pressure-relief valve, wherein a pressure-relief condensation cavity is formed in the housing, exhaust holes and a pressure-relief air inlet are formed in the housing, and the pressure-relief valve is arranged at the pressure-relief air inlet; an exhaust pipe, wherein two ends of the exhaust pipe are respectively connected to a steam switch on a pressure steam oven and the pressure-relief condensation cavity; a pressure-relief pipe, which is used for communicating the pressure steam oven with the pressure-relief air inlet; and a condensation water pipe, wherein one end of the condensation water pipe is communicated with the pressure-relief condensation cavity, and the other end of the condensation water pipe is connected to a condensation water box so as to feed condensation water in the pressure-relief condensation cavity into the condensation water box. In the present application, steam generated in the pressure steam oven during cooking under both pressure and pressure-free states can enter the pressure-relief condensation cavity through the exhaust pipe or the pressure-relief pipe, so as to implement condensation reflux, reduce the steam humidity, and avoid an increase in the air humidity of a kitchen caused by exhausted steam, thereby improving user experience.

Description

Exhaust pressure relief condenser reflux device and pressure steam oven Technical Field

[0001] This application belongs to the field of small household appliance technology, and in particular relates to an exhaust pressure relief condensation reflux device and a pressure steam oven. Background Technology

[0002] With the improvement of living standards, steam ovens are becoming increasingly popular. Steam ovens can toast bread slices, roast meats, and steam and roast foods, making them a favorite among consumers. With technological advancements and a faster pace of life, people are more focused on time management and have higher expectations for the taste of cooked food. This has led to concerns about the long cooking times and poor texture of some foods. Pressure steam ovens have emerged as a solution, not only speeding up cooking but also enhancing the taste of cooked food through pressure. Furthermore, pressure steam ovens can cook food effectively even under low pressure. However, the increased pressure inside the oven also presents several challenges. For example, issues such as venting and depressurization have become industry-wide problems. Currently, conventional venting and depressurization structures use two independent components, and the steam after venting and depressurization is not condensed. This not only increases costs and assembly difficulty but also increases humidity in the kitchen, resulting in a poor user experience. Therefore, pressure steam ovens require further structural optimization. Summary of the Invention

[0003] In view of the above-mentioned problems existing in the prior art, the purpose of this application is to provide an exhaust pressure relief condensation reflux device and a pressure steam oven.

[0004] The technical solution adopted in this application embodiment is an exhaust pressure relief condensation reflux device, comprising:

[0005] A pressure relief condensation component includes a housing and a pressure relief valve. A pressure relief condensation chamber is formed inside the housing. The housing is provided with an exhaust port and a pressure relief inlet communicating with the pressure relief condensation chamber. The pressure relief valve is located at the pressure relief inlet and is used to control the opening and closing of the pressure relief inlet.

[0006] The exhaust pipe is connected at both ends to the steam switch on the pressure steam oven and the pressure relief condenser, respectively, so that when the steam switch is in the open state, the steam in the pressure steam oven can enter the pressure relief condenser.

[0007] A pressure relief pipe is used to connect the pressure steam oven and the pressure relief air inlet so that when the pressure in the pressure steam oven is greater than a preset value, the steam in the pressure steam oven can push the pressure relief valve to open so that the steam can enter the pressure relief condensation chamber.

[0008] A condensate pipe, one end of which is connected to the pressure relief condensation chamber and the other end of which is connected to a condensate box, is used to send the condensate in the pressure relief condensation chamber into the condensate box.

[0009] The exhaust pressure relief condensation recirculation device in this embodiment of the application is connected to the pressure steam oven through an exhaust pipe and a pressure relief pipe, respectively, so that the steam generated by the pressure steam oven during cooking under pressure and pressureless conditions can enter the pressure relief condensation chamber through the exhaust pipe or the pressure relief pipe for condensation recirculation, thereby reducing the humidity of the steam and preventing the exhaust steam from increasing the air humidity in the kitchen, thus improving the user experience.

[0010] In an optional embodiment, the housing is provided with an exhaust inlet communicating with the pressure relief condensation chamber. The first end of the exhaust pipe is connected to the outlet of the steam switch, and the second end of the exhaust pipe is connected to the exhaust inlet. The inlet of the steam switch is connected to the interior of the pressure steam oven. This design is reasonable and facilitates the entry of steam from the pressure steam oven into the pressure relief condensation chamber through the steam switch during pressureless cooking.

[0011] In an optional embodiment, a drain outlet communicating with the pressure relief condensation chamber is provided at the bottom or lower side of the housing, and one end of the condensate pipe is connected to the drain outlet. This design is reasonable and facilitates the drainage of condensate.

[0012] In an optional embodiment, a drain port communicating with the pressure relief condensing chamber is provided at the bottom or lower side of the housing. The first end of the exhaust pipe is connected to the steam outlet of the steam switch, and the second end of the exhaust pipe is connected to the drain port. One end of the condensate pipe is connected to the middle of the exhaust pipe, so that the condensate in the pressure relief condensing chamber can be sequentially sent to the condensate box via the exhaust pipe and the condensate pipe. This simplifies the structure and increases the flexibility of the structural design.

[0013] In an optional embodiment, the condensate pipe includes a terminal section near the condensate box, the terminal section extending laterally, and the tail end of the terminal section extending into the condensate box. The height of the portion of the terminal section adjacent to the tail end is higher than the height of the head end of the terminal section. This prevents steam from flowing into the condensate box and instead spraying out of it.

[0014] In an optional embodiment, the upper middle part of the pressure relief condensing chamber is provided with a condensing structure for condensing steam; and / or

[0015] The bottom of the pressure relief condensing chamber is provided with a first flow guiding structure, which is used to guide the condensate to the location where the condensate pipe connects to the pressure relief condensing chamber. By setting up the condensation structure and the flow guiding structure, the condensation of steam and the discharge of condensate are facilitated.

[0016] In an optional embodiment, the condensation structure includes a plurality of condensation plates spaced apart on the top wall of the housing; and / or

[0017] The first flow guiding structure includes a first flow guiding plate and a second flow guiding plate disposed on the bottom wall of the housing. One end of the first flow guiding plate is connected to the first side wall of the housing and spaced apart from the second side wall of the housing. One end of the second flow guiding plate is connected to the second side wall of the housing and spaced apart from the first side wall of the housing. The first and second flow guiding plates are alternately arranged, wherein the first side wall and the second side wall are arranged opposite to each other. The condensation structure and flow guiding structure are simple and reasonable in design, and have excellent effects.

[0018] In an optional embodiment, the bottom wall of the housing gradually rises from the middle towards the third and fourth side walls, forming a condensate collection groove in the middle of the bottom wall. A drain outlet is provided at the location corresponding to the condensate collection groove. The other ends of the first and second guide plates are inclined towards the condensate collection groove, with the third and fourth side walls facing each other. This design, with the bottom wall being lower in the middle and higher on both sides, along with the inclined guide plates, facilitates the collection of condensate.

[0019] In an optional embodiment, the pressure relief inlet and the exhaust inlet are disposed far apart on the housing; the housing is provided with second flow guiding structures corresponding to the pressure relief inlet and the exhaust inlet, respectively, the second flow guiding structures being formed by an upward arching of a portion of the top wall of the housing; condensation structures extending downward to below the pressure relief inlet or the exhaust inlet are respectively provided on opposite sides of the second flow guiding structures, so that the steam entering the pressure relief condensation chamber from the pressure relief inlet and the exhaust inlet first flows upward to the second flow guiding structure, and after being guided by the second flow guiding structure, flows downward around the bottom of the condensation structure and enters the pressure relief condensation chamber and is discharged through the exhaust port. In this way, the steam entering the pressure relief condensation chamber can flow through the condensation structure sequentially and be condensed, and the condensed water can also flow through a sufficient path and collect in the condensate collection tank, which is beneficial for the cooling of the condensate.

[0020] A pressure steam oven includes a housing and a door disposed on the housing. The housing is also equipped with a steam switch and a venting, depressurization, condensation, and reflux device as described in any of the above embodiments. The pressure steam oven of this application has venting, depressurization, condensation, and reflux functions, and can reduce the humidity of the exhaust steam.

[0021] Compared with the prior art, the beneficial effects of the embodiments of this application are as follows:

[0022] 1. The exhaust pressure relief condensation and reflux device of this application can automatically exhaust, depressurize, condense and reflux the pressure steam oven, realizing four functions in one, and can realize exhaust pressure relief condensation and reflux of steam in both pressurized and unpressurized states of the pressure steam oven.

[0023] 2. The exhaust pressure relief condensation reflux device of this application can condense steam, reduce the humidity of steam, prevent water spraying out due to excessive steam humidity, and also prevent the exhaust steam from increasing the humidity of the kitchen air, thus improving the user experience.

[0024] 3. The exhaust pressure relief condensation reflux device of this application has an upward-facing exhaust hole on the upper cover, which can also perform directional discharge of steam, so that the steam is sprayed out in one direction and avoids the steam being sprayed out in all directions;

[0025] 4. This application has a simple structure, low cost, convenient operation, and is easy to implement.

[0026] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this application.

[0027] The overview of various implementations or examples of the technology described in this application is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0028] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The drawings generally illustrate various embodiments by way of example rather than limitation and, together with the description and claims, serve to illustrate the claimed embodiments. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts.

[0029] Figure 1 is a schematic diagram of the exhaust pressure relief condensation reflux device of this application applied to a pressure steam oven.

[0030] Figure 2 is an exploded view of the exhaust pressure relief condensation reflux device according to an embodiment of this application.

[0031] Figure 3 is a perspective sectional view of the exhaust pressure relief condensation reflux device according to an embodiment of this application.

[0032] Figure 4 is a front sectional view of the exhaust pressure relief condensation reflux device according to an embodiment of this application.

[0033] Figure 5 is a three-dimensional structural diagram of the upper cover of the pressure relief condensation component according to an embodiment of this application.

[0034] Figure 6 is a three-dimensional structural diagram of the lower shell of the pressure relief condensation component according to an embodiment of this application.

[0035] Figure 7 is a schematic diagram of the steam flow direction in the depressurized condenser during pressurized cooking.

[0036] Figure 8 is a schematic diagram of the steam flow direction in the pressure relief condenser during pressureless cooking.

[0037] Figure 9 is a schematic diagram of the flow direction of condensate in the pressure relief condensation chamber.

[0038] Figure 10 is a schematic diagram of another structure of the exhaust pressure relief condensation reflux device according to an embodiment of this application applied to a pressure steam oven.

[0039] Figure 11 is an exploded view of the exhaust pressure relief condensation reflux device in Figure 10.

[0040] Reference numerals: 1-Pressure relief condenser component; 11-Housing shell; 111-Lower shell; 1111-Boss; 1112-Condensate collection tank; 1113-Slot; 112-Top cover; 1121-Rib; 113-Exhaust port; 114-Pressure relief inlet; 115-Exhaust inlet; 116-Drain outlet; 117-Condensation structure; 1171-First condenser plate; 1172-Second condenser plate; 118-First flow guide structure; 1181-First flow guide plate; 1182-Second flow guide plate; 1183-Support; 119-Second flow guide structure; 12-Pressure relief valve; 121-Valve core; 122-Valve hole; 2-Exhaust pipe; 3-Pressure relief pipe; 4-Condensate pipe; 41-End section; 411-First position point; 412-Second position point; 5-Tee; 10-Box body; 20-Box door; 30-Heating element; 40-Steam switch; 401-Steam inlet pipe; 50-Condensate box; 60-Display control component. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the described embodiments of this application without creative effort are within the scope of protection of this application.

[0042] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] To keep the following description of the embodiments of this application clear and concise, detailed descriptions of known functions and known components are omitted.

[0044] The application provides a venting, depressurization, condensation, and recirculation device for use in a pressure steam oven. This device vents and depressurizes the steam during cooking and condenses and recirculates the discharged steam.

[0045] As shown in Figure 1, the exhaust pressure relief condensation return device includes a pressure relief condensation component 1, an exhaust pipe 2, a pressure relief pipe 3, and a condensate pipe 4.

[0046] As shown in Figures 2 to 6, the pressure relief condensing component 1 includes a housing 11 and a pressure relief valve 12. A pressure relief condensing chamber is formed inside the housing 11. The housing 11 is provided with an exhaust port 113 and a pressure relief inlet 114 that communicate with the pressure relief condensing chamber. The pressure relief valve 12 is located at the pressure relief inlet 114 and is used to control the opening and closing of the pressure relief inlet 114.

[0047] As shown in Figure 1, the two ends of the exhaust pipe 2 are connected to the steam switch 40 on the pressure steam oven and the pressure relief condensing chamber, respectively, so that when the steam switch 40 is in the open state, the steam in the pressure steam oven can enter the pressure relief condensing chamber. The pressure relief pipe 3 is used to connect the pressure steam oven and the pressure relief air inlet 114, so that when the pressure in the pressure steam oven is greater than a preset value, the steam in the pressure steam oven can push the pressure relief valve 12 to open, allowing steam to enter the pressure relief condensing chamber. One end of the condensate pipe 4 is connected to the pressure relief condensing chamber, and the other end is connected to the condensate box 50, used to send the condensate in the pressure relief condensing chamber into the condensate box 50.

[0048] The exhaust, pressure relief, condensation, and recirculation device of this embodiment is connected to the pressure steam oven via an exhaust pipe 2 and a pressure relief pipe 3, respectively. This allows steam generated during cooking to enter the pressure relief and condensation chamber through the exhaust pipe 2 or the pressure relief pipe 3, enabling the pressure steam oven to exhaust and relieve pressure both during pressurized and depressurized cooking. Furthermore, the steam condenses and recirculates within the pressure relief and condensation chamber, releasing its contained moisture to reduce humidity and temperature, before being discharged through the exhaust port 113. This prevents the discharged steam from increasing the humidity in the kitchen, improving the user experience. In short, the exhaust, pressure relief, condensation, and recirculation device of this embodiment combines four functions into one: exhausting, depressurizing, condensing, and recirculating the steam in the pressure steam oven.

[0049] In some embodiments, as shown in FIG2, the housing 11 is provided with an exhaust inlet 115 communicating with the pressure relief condensing chamber. The first end of the exhaust pipe 2 is connected to the outlet of the steam switch 40 (see FIG1), and the second end of the exhaust pipe 2 is connected to the exhaust inlet 115. The inlet of the steam switch 40 is connected to the inside of the pressure steam oven (for example, as shown in FIG1, the inlet of the steam switch 40 is connected to the steam inlet pipe 401, which extends into the pressure steam oven), so that when the steam switch 40 is opened, the steam in the pressure steam oven can enter the pressure relief condensing chamber through the exhaust pipe 2. When the pressure steam oven is cooking without pressure, the steam switch 40 is opened, and the pressure steam oven is connected to the pressure relief condensing chamber of the pressure relief condensing component 1 through the exhaust pipe 2. The steam generated in the pressure steam oven can enter the pressure relief condensing chamber in time to exhaust and relieve pressure in the pressure steam oven, keeping the pressure steam oven in a pressure-free state. At the same time, the pressure relief condensing chamber condenses and refluxes the steam entering it, reducing the temperature and humidity of the steam before discharging it out through the exhaust port 113. In this way, the pressure steam oven achieves degassing, pressure relief, condensation, and reflux during pressureless cooking.

[0050] In some embodiments, the first end of the exhaust pipe 2 can be designed to be higher than the second end of the exhaust pipe 2 to facilitate the discharge of condensate in the exhaust pipe 2.

[0051] In some embodiments, one end of the pressure relief pipe 3 is directly connected to and communicates with the pressure relief inlet 114, and the other end of the pressure relief pipe 3 can directly pass through the chamber 10 of the pressure steam oven and communicate with the inside of the chamber 10.

[0052] The vent 113 may be located on the top of the housing 11 to guide the steam out and prevent condensate from being sprayed out with the steam.

[0053] In some embodiments, a drain outlet 116 communicating with a pressure-relief condensing chamber is provided at the bottom or lower side of the housing 11, and one end of the condensate pipe 4 is connected to the drain outlet 116, as shown in Figure 1. The condensate formed by steam condensation will collect at the bottom of the pressure-relief condensing chamber under gravity. Placing the drain outlet 116 at the bottom or lower side facilitates the discharge of condensate. As shown in Figure 2, in this embodiment, the drain outlet 116 is located at the lower side of the housing 11, which facilitates the arrangement of the condensate pipe 4.

[0054] In some embodiments, as shown in Figures 2 to 4, a condensing structure 117 for condensing steam is provided in the upper middle part of the pressure relief condensing chamber. Since steam tends to flow upward, placing the condensing structure 117 in the upper middle part of the pressure relief condensing chamber is more conducive to the condensation of steam, so as to effectively release the moisture contained in the steam and reduce the humidity of the steam.

[0055] In some embodiments, continuing with Figures 2 to 4, a first flow guiding structure 118 is provided at the bottom of the pressure relief condensing chamber. The first flow guiding structure 118 is used to guide the condensate water so that the condensate water flows to the position of the pressure relief condensing chamber near the condensate water pipe 4, so that the condensate water in the pressure relief condensing chamber can be discharged to the condensate water box 50 through the condensate water pipe 4.

[0056] In some embodiments, as shown in Figures 2 to 5, the condensation structure 117 includes a plurality of condensation plates disposed at intervals on the top wall of the housing 11.

[0057] In some embodiments, as shown in Figures 2 to 5 and Figure 6, the first flow guiding structure 118 includes a first flow guiding plate 1181 and a second flow guiding plate 1182 disposed on the bottom wall of the housing 11. One end of the first flow guiding plate 1181 is connected to the first side wall of the housing 11 and spaced apart from the second side wall of the housing 11. One end of the second flow guiding plate 1182 is connected to the second side wall of the housing 11 and spaced apart from the first side wall of the housing 11. The first flow guiding plate 1181 and the second flow guiding plate 1182 are alternately arranged, wherein the first side wall and the second side wall are arranged opposite to each other. By setting the flow guiding plates, not only can the condensate be guided to flow and collect towards the drain outlet 116, but the condensate also forms an S-shaped flow path during the flow process, thereby increasing the flow distance of the condensate and further cooling the condensate, as shown in Figure 9, where the arrow direction indicates the flow direction of the condensate.

[0058] In some embodiments, as shown in Figures 3 and 4, the bottom wall of the housing 11 gradually increases in height from the middle towards the third and fourth side walls, respectively, so that a condensate collection groove 1112 is formed in the middle of the bottom wall. The condensate collection groove 1112 is an elongated strip extending from the first side wall to the second side wall, wherein the third and fourth side walls are arranged opposite to each other. A drain outlet 116 is provided on the housing 11 at a position corresponding to the condensate collection groove 1112. Setting the bottom wall of the housing 11 to be lower in the middle and higher on both sides facilitates condensate collection.

[0059] Furthermore, the other end of the first guide plate 1181 and the other end of the second guide plate 1182 are inclined toward the condensate collection tank 1112, which makes it easier to guide the condensate to the condensate collection tank 1112.

[0060] To facilitate the layout of the condensing structure 117 and the flow guiding structure, as well as subsequent maintenance during use, the housing 11 can adopt a split structure. As shown in Figure 2, the housing 11 includes a lower shell 111 and an upper cover 112. The upper end of the lower shell 111 is open, and the upper cover 112 is used to seal the upper opening of the lower shell 111. The lower shell 111 and the upper cover 112 form a closed pressure-relief condensing chamber. The condensing structure 117 can be disposed on the upper cover 112, and the first flow guiding structure 118 can be disposed on the lower shell 111.

[0061] As shown in Figures 1 and 4, the upper cover 112 and the lower shell 111 can be connected by a snap-fit ​​structure. The snap-fit ​​structure includes a rib 1121 on the upper cover 112 and a slot 1113 on the lower shell 111. When the upper cover 112 is placed on the lower shell 111, the rib 1121 on the upper cover 112 embeds into the slot 1113 on the lower shell 111, thus fixing the upper cover 112 to the lower shell 111. Multiple ribs 1121 and slots 1113 can be arranged around the outer periphery of the upper cover 112 and the lower shell 111 to improve stability.

[0062] Specifically, as shown in Figure 5, one side of each of the multiple condensing plates constituting the condensation structure 117 is fixed to the inner side of the upper cover 112, and all the multiple condensing plates are perpendicular to the upper cover 112. The first sidewall, second sidewall, third sidewall, fourth sidewall, and bottom wall of the lower shell 111 respectively constitute the first sidewall, second sidewall, third sidewall, fourth sidewall, and bottom wall of the shell 11. As shown in Figure 6, the first guide plate 1181 and the second guide plate 1182 constituting the first flow guiding structure 118 are both fixed to the bottom wall of the lower shell 111. In order to support and limit the upper cover 112, a portion of the first guide plate 1181 and / or the second guide plate 1182 extends upward to form a support portion 1183 on the side connected to the first sidewall and the second sidewall. When the upper cover 112 is placed on the lower shell 111, the inner side of the upper cover 112 abuts against the support portion 1183. This allows us to check whether the top cover 112 is properly engaged and also prevents the top cover 112 from falling into the lower shell 111. As shown in Figures 3 and 4, this embodiment shows that the two first guide plates 1181 connected to the first sidewall extend upward to form a support portion 1183, which is only an example.

[0063] Referring to Figure 2, the exhaust inlet 115, drain outlet 116, and pressure relief inlet 114 are all located on the lower shell 111. Furthermore, for ease of pipeline installation, in this embodiment, the exhaust inlet 115, drain outlet 116, and pressure relief inlet 114 are located on the second side wall of the lower shell 111. This side is where the exhaust pressure relief condensation reflux device is attached to the chamber 10 of the pressure steam oven.

[0064] The lengths of the first and second sidewalls are equal and much greater than the lengths of the third and fourth sidewalls, so that the lower shell 111 forms its length direction along the extension direction of the first and second sidewalls, and its width direction along the extension direction of the third and fourth sidewalls. Referring to Figure 2, the exhaust inlet 115 and the pressure relief inlet 114 are respectively located near the two ends of the lower shell 111's length direction, that is, near the two ends of the second sidewall. The drain outlet 116 is located at the corresponding condensate collection tank 1112, centered between the exhaust inlet 115 and the pressure relief inlet 114. This allows the steam entering the pressure relief condensation chamber from the exhaust inlet 115 and the pressure relief inlet 114 to flow sequentially through the condensation structure 117 and be condensed, and the condensed water can also flow through a sufficient path to collect in the condensate collection tank 1112, facilitating the cooling of the condensate.

[0065] As shown in Figures 2 and 3, the vent 113 is located on the upper cover 112, which allows the condensed and cooled steam to be discharged upwards in a directional manner, preventing it from spraying out in all directions and improving the user experience. Specifically, referring to Figures 2 and 3, the vent 113 is arranged in multiple rows, with the arrangement direction of each row of vent 113 parallel to the condenser plate. In this way, the condensed and cooled steam can be evenly dispersed.

[0066] In some embodiments, as shown in FIG4, the top wall of the housing 11, i.e., the upper cover 112, is provided with second flow guiding structures 119 corresponding to the pressure relief inlet 114 and the exhaust inlet 115, respectively. The second flow guiding structures 119 are formed by a partial upward arching of the upper cover 112, and the inner surface of the arched portion is an arc-shaped surface. On opposite sides of the second flow guiding structures 119, condensing structures 117 extending downward to below the pressure relief inlet 114 or the exhaust inlet 115 are respectively provided. The steam entering the pressure relief condensing chamber from the pressure relief inlet 114 and the exhaust inlet 115 first flows upward to their respective second flow guiding structures 119, and after being guided by the second flow guiding structures 119, flows downward, bypasses the lower part of the condensing structures 117, enters the pressure relief condensing chamber, and is then condensed by other condensing structures 117 before being discharged through the exhaust port 113. The steam flow direction is shown in FIG7 and FIG8.

[0067] When the condensing structure 117 is a condensing plate, the two condensing plates located on both sides of the second flow guiding structure 119 are defined as the first condensing plate 1171, and the condensing plates at other positions are defined as the second condensing plate 1172. The bottom edge of the first condensing plate 1171 is located below the corresponding pressure relief inlet 114 or exhaust inlet 115, and the two opposite sides of the first condensing plate 1171 are in close contact with the first side wall and the second side wall of the lower shell 111, respectively. The two first condensing plates 1171, the second flow guiding structure 119, and the first and second side walls of the lower shell 111 together form a structure similar to a cover above the pressure relief inlet 114 or exhaust inlet 115. Under the obstruction of the shroud, the steam entering through the pressure relief inlet 114 and the exhaust inlet 115 cannot flow laterally and be directly discharged through the adjacent exhaust port 113. Instead, it can only flow upward first, and then turn downward under the guidance of the second flow guiding structure 119 to the lower end of the first condensing plate 1171. After bypassing the first condensing plate 1171 and being condensed and cooled by the first condensing plate 1171, it is discharged through the adjacent exhaust port 113. Alternatively, it can continue to flow in the pressure relief condensing chamber, and then be condensed and cooled by the second condensing plate 1172. Finally, it is discharged through other exhaust ports 113. See the arrow directions in Figures 7 and 8, where the arrow directions indicate the flow direction of the steam.

[0068] The size of the second condenser plate 1172 is not limited, and its opposite two sides may not abut against the first and second side walls of the lower shell 111. Its length extending into the lower shell 111 can be selected according to actual needs.

[0069] Referring to Figure 4, a boss 1111 is provided near one end of the lower shell 111. The pressure relief valve 12 includes a valve core 121 and a valve hole 122. The valve hole 122 is located inside the boss 1111, and one end of the valve hole 122 extends to the top surface of the boss 1111 to communicate with the pressure relief condensation chamber. The other end of the valve hole 122 communicates with the pressure relief air inlet 114. The valve core 121 is located inside the valve hole 122 and can move up and down along the valve hole 122. The valve hole 122 has a frustum section, and the valve core 121 has a frustum portion that mates with the frustum section. When the pressure steam oven is not in use or during pressureless cooking, the steam pressure inside the pressure steam oven is low and below a preset value. Under the action of gravity, the valve core 121 blocks the valve hole 122, and the valve hole 122 is in a closed state. The steam inside the pressure steam oven cannot enter the pressure relief condensation chamber through the pressure relief valve 12. When the pressure steam oven is cooking under pressure, the steam valve is closed. As cooking progresses, the steam inside the pressure steam oven increases continuously, and the steam pressure rises continuously. When the steam pressure exceeds the preset value (exceeds the weight of the valve core 121), the steam pushes the valve core 121 upward, opening the valve orifice 122. The steam inside the pressure steam oven enters the pressure relief and condensation chamber, realizing the pressure relief and condensation of steam during pressurized cooking.

[0070] In some other embodiments, as shown in Figure 11, the housing 11 only has a pressure relief inlet 114 and a drain outlet 116, while the air inlet and outlet ports are omitted. As shown in Figure 10, the first end of the exhaust pipe 2 is connected to the outlet of the steam switch 40, and the second end of the exhaust pipe 2 is connected to the drain outlet 116; one end of the condensate pipe 4 is connected to the middle of the exhaust pipe 2, for example, one end of the condensate pipe 4 is connected to the exhaust pipe 2 via a tee 5. The condensate in the pressure relief condensation chamber can be sequentially sent to the condensate box 50 via the exhaust pipe 2 and the condensate pipe 4. In this way, the structure can be simplified and the flexibility of the structural design can be increased.

[0071] At the same time, the first end of the exhaust pipe 2 is set higher than the second end of the exhaust pipe 2 to prevent condensate from flowing into the steam switch 40.

[0072] Referring again to Figure 10, the condensate pipe 4 includes a terminal section 41 near the condensate box 50. The terminal section 41 extends laterally, and its tail end is used to extend into the condensate box 50. The height of the portion of the terminal section 41 adjacent to its tail end is higher than the height of its head end. That is, the first position point 411 in Figure 10 is higher than the second position point 412, preventing steam from flowing into the condensate box 50 through the exhaust pipe 2 and the condensate pipe 4, and thus being ejected from the condensate box 50.

[0073] In addition to directly passing through the housing 10 of the pressure steam oven and connecting to the interior of the housing 10 as shown in Figure 1, the other end of the pressure relief pipe 3 can also be connected to the steam switch 40, as shown in Figure 10, and then connected to the pressure steam oven through the steam switch 40. That is, when the steam switch 40 is closed, the steam in the pressure steam oven can enter the pressure relief inlet 114 through the steam switch 40 and the pressure relief pipe 3.

[0074] This application also provides a pressure steam oven, which includes a housing 10 and a door 20 disposed on the housing 10. A heating element 30 is also disposed inside the housing 10. The housing 10 is also provided with a steam switch 40 and an exhaust pressure relief condensation recirculation device as described in any of the above embodiments.

[0075] The heating element 30 is used to heat the inner cavity of the housing 10; the steam switch 40 can control the steam discharge and shut-off of the inner cavity of the housing 10, and control the rise and fall of the inner cavity pressure of the housing 10. A display and control element 60 can be installed above the door 20 to control the overall program. The condensate box 50 can be located on the lower part of the housing 10 near the door 20, so that the condensate box 50 can be removed from the side of the door 20 to empty the condensate.

[0076] The pressure steam oven of this application has a venting, depressurizing, condensing and reflux device, thus having the functions of venting, depressurizing, condensing and refluxing, reducing the humidity of the vented steam, and further guiding the condensed and depressurized steam out to prevent condensate from being sprayed out with the steam.

[0077] The working process and principles of this application are explained below:

[0078] As shown in Figure 1, when the pressure steam oven is not in pressure cooking mode, i.e., in normal mode, the display control module does not provide a signal to the steam switch 40, the steam switch 40 does not work, the steam switch 40 is in the open state, the exhaust pipe 2 is connected to the inside of the oven 10 through the steam switch 40, at this time the inside of the oven 10 is in a pressureless state, the steam in the oven 10 can directly enter the pressure relief condensation chamber of the exhaust pressure relief condensation device through the exhaust pipe 2 and the exhaust inlet 115. The steam in the pressure relief condensation chamber is condensed through the condensation structure 117 and the flow guiding structure to reduce the moisture in the steam and guide the steam. After condensation, the steam is sprayed out through the exhaust hole 113. The condensate water generated after the steam is condensed flows into the condensate box 50 through the drain outlet 116 and the condensate pipe 4 for collection.

[0079] When the pressure cooking mode is activated, i.e., in pressure mode, the display control module provides a signal to the steam switch 40, which operates and is in a closed state. The exhaust pipe 2 is not connected to the inside of the cabinet 10, and the steam inside the cabinet 10 cannot enter the pressure relief condensing chamber through the steam switch 40 and the exhaust pipe 2. At this time, the inside of the cabinet 10 is under pressure. When the pressure reaches the set value, i.e., when the steam pressure in the cabinet 10 is greater than the weight of the shaft of the pressure relief valve 12, the steam in the cabinet 10 pushes up the shaft. The steam in the cabinet 10 enters the pressure relief condensing chamber through the pressure relief pipe 3 and the pressure relief air inlet 114. The steam in the pressure relief condensing chamber is condensed through the condensing structure 117 and the guide structure (the guide structure also has a certain condensing effect, especially the support part 1183), reducing the moisture in the steam and guiding the steam. The condensed steam is ejected from the exhaust hole 113, and the water after steam condensation flows from the drain outlet 116 through the condensate pipe 4 into the condensate box 50 for collection.

[0080] In the embodiment shown in Figure 10, the working process and principle are basically the same as those described above. The only difference is that in the pressureless cooking mode, the steam in the cabinet 10 enters the pressure relief condensing chamber through the drain port 116, and the condensate in the pressure relief condensing chamber first enters the exhaust pipe 2 through the drain port 116, and then enters the condensate pipe 4 and flows into the condensate box 50.

[0081] The above description is intended to be illustrative and not restrictive. Those skilled in the art can make variations, modifications, substitutions, and alterations to the above embodiments within the scope of this disclosure. Moreover, the above examples (or one or more of them) can be used in combination with each other, and these embodiments can be combined with each other in various combinations or arrangements.

Claims

1. A venting, depressurization, condensation, and reflux device, characterized in that, include: The pressure relief condensation component (1) includes a housing (11) and a pressure relief valve (12). A pressure relief condensation chamber is formed inside the housing (11). The housing (11) is provided with an exhaust port (113) and a pressure relief inlet (114) communicating with the pressure relief condensation chamber. The pressure relief valve (12) is located at the pressure relief inlet (114) and is used to control the opening and closing of the pressure relief inlet (114). The exhaust pipe (2) is connected at both ends to the steam switch (40) on the pressure steam oven and the pressure relief condensing chamber, so that when the steam switch (40) is in the open state, the steam in the pressure steam oven can enter the pressure relief condensing chamber. The pressure relief pipe (3) is used to connect the pressure steam oven and the pressure relief air inlet (114) so ​​that when the pressure in the pressure steam oven is greater than a preset value, the steam in the pressure steam oven can push the pressure relief valve (12) to open so that the steam enters the pressure relief condensation chamber. A condensate pipe (4) is connected at one end to the pressure relief condensation chamber and at the other end to a condensate box (50) for sending the condensate in the pressure relief condensation chamber into the condensate box (50).

2. The exhaust pressure relief condensation reflux device according to claim 1, characterized in that, The housing (11) is provided with an exhaust inlet (115) that communicates with the pressure relief condensation chamber. The first end of the exhaust pipe (2) is connected to the outlet of the steam switch (40), and the second end of the exhaust pipe (2) is connected to the exhaust inlet (115). The inlet of the steam switch (40) is connected to the inside of the pressure steam oven.

3. The exhaust pressure relief condensation reflux device according to claim 1 or 2, characterized in that, The bottom or lower side of the housing (11) is provided with a drain port (116) that communicates with the pressure relief condensation chamber, and one end of the condensate pipe (4) is connected to the drain port (116).

4. The exhaust pressure relief condensation reflux device according to claim 1, characterized in that, The bottom or lower side of the housing (11) is provided with a drain outlet (116) that communicates with the pressure relief condensing chamber. The first end of the exhaust pipe (2) is connected to the steam outlet of the steam switch (40), and the second end of the exhaust pipe (2) is connected to the drain outlet (116). One end of the condensate pipe (4) is connected to the middle of the exhaust pipe (2) so that the condensate in the pressure relief condensing chamber can be sent into the condensate box (50) in sequence through the exhaust pipe (2) and the condensate pipe (4).

5. The exhaust pressure relief condensation reflux device according to claim 4, characterized in that, The condensate pipe (4) includes a terminal section (41) near the condensate box (50), the terminal section (41) extends laterally, and the tail end of the terminal section (41) extends into the condensate box (50), the height of the portion of the terminal section (41) adjacent to the tail end is higher than the height of the head end of the terminal section (41).

6. The exhaust pressure relief condensation reflux device according to claim 2, characterized in that, The upper middle part of the pressure relief condensing chamber is provided with a condensing structure (117) for condensing steam; and / or The bottom of the pressure relief condensing chamber is provided with a first flow guiding structure (118), which is used to guide the condensate water to the position where the condensate water pipe (4) is connected to the pressure relief condensing chamber.

7. The exhaust pressure relief condensation reflux device according to claim 6, characterized in that, The condensation structure (117) includes multiple condensation plates spaced apart on the top wall of the housing (11); and / or The first flow guiding structure (118) includes a first flow guiding plate (1181) and a second flow guiding plate (1182) disposed on the bottom wall of the housing (11). One end of the first flow guiding plate (1181) is connected to the first side wall of the housing (11) and spaced apart from the second side wall of the housing (11). One end of the second flow guiding plate (1182) is connected to the second side wall of the housing (11) and spaced apart from the first side wall of the housing (11). The first flow guiding plate (1181) and the second flow guiding plate (1182) are alternately arranged, wherein the first side wall and the second side wall are arranged opposite to each other.

8. The exhaust pressure relief condensation reflux device according to claim 7, characterized in that, The bottom wall of the housing (11) gradually increases in height from the middle towards the third and fourth side walls of the housing (11), so that a condensate collection tank (1112) is formed in the middle of the bottom wall. The housing (11) is provided with a drain outlet (116) at the position corresponding to the condensate collection tank (1112). The other end of the first guide plate (1181) and the other end of the second guide plate (1182) are inclined toward the condensate collection tank (1112), wherein the third side wall and the fourth side wall are arranged opposite to each other.

9. The exhaust pressure relief condensation reflux device according to claim 6, characterized in that, The pressure relief inlet (114) and the exhaust inlet (115) are disposed far apart on the housing (11); the housing (11) is provided with a second flow guiding structure (119) corresponding to the pressure relief inlet (114) and the exhaust inlet (115) respectively, the second flow guiding structure (119) is formed by a portion of the top wall of the housing (11) arching upward; on the opposite sides of the second flow guiding structure (119) are respectively provided a condensing structure (117) extending downward to below the pressure relief inlet (114) or the exhaust inlet (115), so that the steam entering the pressure relief condensing chamber from the pressure relief inlet (114) and the exhaust inlet (115) first flows upward to the second flow guiding structure (119), and after being guided by the second flow guiding structure (119), flows downward around the bottom of the condensing structure (117) and enters the pressure relief condensing chamber and is discharged through the exhaust hole (113).

10. A pressure steam oven, comprising a housing (10) and a door (20) disposed on the housing (10), characterized in that, The housing (10) is also provided with a steam switch (40) and an exhaust pressure relief condensation reflux device as described in any one of claims 1 to 9.

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