A condensation recovery system and a steam oven

Abstract

This invention relates to a condensation recovery system and a steam oven, comprising: a water tank assembly, a condensation device, and an inner liner assembly. The water tank assembly has a drain outlet; the condensation device has an airflow channel and a liquid flow channel, the liquid flow channel being heat-transferringly connected to the airflow channel for condensing steam within the airflow channel, and the liquid flow channel connecting to the drain outlet; the inner liner assembly has a cooking cavity, a water inlet connecting to the cooking cavity, a steam outlet connecting to the cooking cavity, and an evaporation zone located at the bottom of the cooking cavity. The water inlet is connected to the liquid flow channel for introducing heat-absorbing liquid water, the evaporation zone for heating the liquid water in the cooking cavity and generating steam suitable for cooking, and the steam outlet is connected to the airflow channel for discharging steam from the cooking cavity. The high-temperature steam discharged from the cooking cavity exchanges heat with the low-temperature liquid water supplied by the water tank, condensing the steam while simultaneously reducing the temperature difference between the water inlet and the evaporation zone, ensuring a stable amount of steam within the cooking cavity.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and in particular to a condensation recovery system and a steam oven. Background Technology

[0002] With the continuous improvement of living standards and changes in eating habits, steam ovens and steam cookers can quickly generate steam and are easy to use to make pastries and dishes. As a result, they are loved by consumers and have become an indispensable food cooking tool in everyone's daily life. Simply fill the water tank with drinking water, put the food into the cavity, and high-temperature steam will be generated to cook the food.

[0003] Existing steam ovens / steam ovens generate steam through a built-in heating plate and an external evaporator. Excess air pressure inside the cavity is discharged through the steam exhaust pipe, carrying away the steam. This requires continuous water replenishment, which causes three problems: ① High water consumption, the 1.3L water tank takes up a lot of space, and a full tank can only cook for about one hour; ② Large amount of steam is discharged, which can easily cause scalding and condensation in the air duct; ③ The steam generating device is subjected to thermal shock every time water is added, and injecting cold water at high temperature may cause the solder pads to crack. Summary of the Invention

[0004] Therefore, it is necessary to provide a condensation recovery system and a steam oven to address the above problems.

[0005] This application provides a condensation recovery system, comprising: a water tank assembly, a condensing device, and an inner liner assembly, wherein the water tank assembly has a drain outlet; the condensing device has an airflow channel and a liquid flow channel, the liquid flow channel being heat-transferringly connected to the airflow channel for condensing steam within the airflow channel, and the liquid flow channel being connected to the drain outlet; the inner liner assembly has a cooking chamber, a water inlet connected to the cooking chamber, a steam outlet connected to the cooking chamber, and an evaporation zone located at the bottom of the cooking chamber, the water inlet being connected to the liquid flow channel for introducing heat-absorbing liquid water, the evaporation zone being used to heat the liquid water in the cooking chamber and generate steam suitable for cooking, and the steam outlet being connected to the airflow channel for discharging steam from the cooking chamber.

[0006] The condensation recovery system of this invention exchanges heat between the high-temperature steam discharged from the cooking chamber and the low-temperature liquid water supplied by the water tank through a condensation device. The steam is condensed into liquid water in the airflow channel for recovery, and the liquid water absorbs the residual heat of the steam in the liquid flow channel, then returns to the evaporation zone at the bottom of the cooking chamber through the inlet to reheat and generate steam, forming a closed loop of "evaporation—exhaust—condensation—preheating and recirculation—re-evaporation". This achieves three benefits: First, the condensation and recycling of steam significantly reduces water consumption, allowing for long-term cooking without a large-capacity water tank; second, the steam is preferentially condensed inside the system rather than discharged in large quantities, reducing the risk of scalding from exhaust steam and the problem of condensation in the air duct; third, the water returning to the cooking chamber is preheated by the condensation device, significantly reducing the temperature difference between the inlet and the evaporation zone, avoiding the problem of a sudden drop in steam volume caused by injecting cold water at high temperatures, and helping to maintain stable steam volume during water addition.

[0007] In one embodiment, the condensation recovery system further includes a first two-position three-way solenoid valve, the inlet of which is connected to the drain outlet, and the two outlets of which are respectively connected to the liquid flow channel and the cooking chamber.

[0008] With this setup, the water tank drain outlet is switched between two paths via the first and second three-way solenoid valves, dividing the water required for system operation into two parts. The first part enters the cooking chamber directly before the system starts working, ensuring that there is enough liquid water pre-stored in the cooking chamber. The second part is preheated by the condenser during system operation and then flows back, taking into account both condensation and heat recovery needs.

[0009] In one embodiment, the condensation recovery system further includes a preheating component having a preheating chamber, a low-temperature water inlet communicating with the preheating chamber, a high-temperature water outlet communicating with the preheating chamber, and a heating zone connected to the preheating chamber for heat transfer. The low-temperature water inlet is connected to the liquid flow channel, and the high-temperature water outlet is connected to the cooking chamber.

[0010] With this configuration, the preheating component reheats the liquid water that has been initially heated by the condenser, further increasing the inlet water temperature before it is sent into the cooking chamber. This minimizes the temperature difference between the inlet water and the evaporation zone, further maintaining the stability of the steam volume in the cooking chamber and improving the overall thermal efficiency of the system.

[0011] In one embodiment, the preheating assembly includes an evaporator and a second two-position three-way solenoid valve. The preheating chamber is provided by the evaporator. The inlet of the second two-position three-way solenoid valve is connected to the evaporator. One outlet of the second two-position three-way solenoid valve is used as a high-temperature water outlet, and the other outlet of the second two-position three-way solenoid valve is connected to the airflow channel and used as a high-temperature steam outlet.

[0012] This configuration utilizes the evaporator as both a preheating chamber and a steam generator, and selects between high-temperature water or high-temperature steam via a second two-position three-way solenoid valve, enabling a single component to achieve dual functions. In steam mode, the evaporator outputs high-temperature water to the cooking chamber via the second two-position three-way solenoid valve, while in cleaning mode, the evaporator outputs high-temperature steam to the airflow channel of the condenser via the second two-position three-way solenoid valve.

[0013] In one embodiment, the condensate recovery system further includes a third two-position three-way solenoid valve, a wastewater outlet, and a water quality detector. The inlet of the third two-position three-way solenoid valve is connected to the airflow channel for recovering the condensate flowing back in the airflow channel. The two outlets of the third two-position three-way solenoid valve are respectively connected to the wastewater outlet and the cooking chamber. The water quality detector is communicatively connected to the third two-position three-way solenoid valve and is used to detect the water quality of the condensate flowing back. When the water quality is qualified, the third two-position three-way solenoid valve is controlled to switch to connect to the cooking chamber; otherwise, the third two-position three-way solenoid valve is controlled to switch to connect to the wastewater outlet.

[0014] With this setup, the water quality detector monitors the quality of the condensate flowing back through the airflow channel in real time. If the quality is acceptable, it is switched to the cooking chamber for recycling via the third and second position three-way solenoid valves. If the quality is unacceptable, it is switched to the wastewater outlet for discharge, ensuring the hygiene and safety of cooking water while maximizing water conservation.

[0015] In one embodiment, the condensation device includes: a housing and a water-cooling pipe, wherein the housing has a receiving cavity and an air inlet, an exhaust outlet, a water inlet, and a water outlet communicating with the receiving cavity, the height of the exhaust outlet being higher than the height of the air inlet to form the airflow channel with the receiving cavity and the air inlet; the water-cooling pipe is installed on the housing, and both ends of the water-cooling pipe are respectively connected to the water inlet and the water outlet to form the liquid flow channel.

[0016] With this configuration, the exhaust port in the condenser housing is positioned higher than the air inlet port, utilizing the principle of natural steam rise and gravity reflux of condensate to guide the airflow direction; the water-cooled pipe is connected to the water inlet and water outlet at both ends to form independent liquid flow channels, achieving orderly isolation of gas and liquid paths and efficient heat exchange.

[0017] In one embodiment, the water-cooled pipe includes multiple stacked rings, with adjacent rings connected end to end to form a spiral structure.

[0018] With this configuration, the water-cooled pipes adopt a spiral structure with multiple rings stacked and connected end to end, which significantly increases the heat exchange area and extends the fluid path within a limited space, improving the steam condensation efficiency and the liquid water heat absorption efficiency, making the device more compact and efficient.

[0019] In one embodiment, the housing also has a cleaning hole at the top for introducing high-temperature steam.

[0020] With this design, a cleaning hole is opened on the top of the outer casing, allowing high-temperature steam to be introduced to perform self-cleaning of the condenser, removing scale and impurities accumulated on the surface of the water-cooling pipes during long-term use, maintaining stable heat exchange performance, and extending the service life of the device.

[0021] In one embodiment, the condensation device further includes a steam distribution plate disposed between the cleaning hole and the water-cooling pipe to divide the receiving cavity into an upper space and a lower space. The steam distribution plate has a plurality of steam distribution holes that connect the upper space and the lower space.

[0022] With this configuration, the steam distribution plate divides the containment cavity into upper and lower spaces, and distributes high-temperature cleaning steam evenly to each area of ​​the water-cooled pipe through multiple steam distribution holes, ensuring that the surface of the water-cooled pipe is clean without dead corners and improving the consistency of the self-cleaning effect.

[0023] This application also provides a steam oven that uses the above-mentioned condensation recovery system.

[0024] This configuration integrates the aforementioned condensation recovery system into the steam oven, giving the entire machine both steam cooking and condensation recovery energy-saving functions. It reduces power and water consumption while improving safety, thus expanding the application scenarios and market competitiveness of the steam oven. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a condensation recovery system in one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a steam oven in one embodiment of the present invention; Figure 3 for Figure 2 The diagram shows the structure of the steam oven from another perspective. Figure 4 for Figure 2 Schematic diagram of the intermediate condenser unit; Figure 5 for Figure 4 Schematic diagram of the internal structure of the intermediate condenser; Figure 6 for Figure 4 A schematic diagram of the internal structure of the intermediate condenser from another perspective; Figure 7 for Figure 2 Schematic diagram of the preheating component; Figure 8 This is a flowchart illustrating the workflow of the steam oven of this application.

[0027] Figure label: 100. Water tank assembly; 101. Drain outlet; 110. Tank body; 120. Water pump; 200. Condensation unit; 201. Airflow channel; 202. Liquid flow channel; 203. Air inlet; 204. Steam exhaust port; 205. Water inlet; 206. Water outlet; 207. Cleaning port; 208. Return port; 210. Outer shell; 211. Guide surface; 220. Water cooling pipe; 230. Steam distributor plate; 231. Steam distributor port; 300. Inner tank assembly; 301. Cooking cavity; 302. Evaporation zone; 303. Water inlet; 304. Steam vent; 400. Preheating component; 401. Preheating chamber; 402. Heating zone; 410. Heating element; 420. Hot water replacement pipe; 500. Exhaust system; 600. First and second position three-way solenoid valve; 700, Second two-position three-way solenoid valve; 800, third two-position three-way solenoid valve; 900. Water quality detector. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0029] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0033] With the continuous improvement of living standards and changes in eating habits, steam ovens and steam cookers can quickly generate steam and are easy to use to make pastries and dishes. As a result, they are loved by consumers and have become an indispensable food cooking tool in everyone's daily life. Simply fill the water tank with drinking water, put the food into the cavity, and high-temperature steam will be generated to cook the food.

[0034] Existing steam ovens and steam grills use a combination of an internal heating plate and an external evaporator, either individually or in combination. While steam is generated and delivered into the cavity, excess pressure within the cavity needs to be expelled through the exhaust pipe, inevitably carrying away steam. Therefore, a continuous supply of steam is required, which presents three problems: ① High water consumption: the 1.3L water tank occupies a large space, and a full tank only allows for a maximum of one hour of cooking. ② Large volume of steam exhaust: steam can easily hit your face, and condensation can form in the air duct. ③ Each time water is added, the steam generator undergoes a thermal shock; introducing cold water at a high temperature can cause problems such as cracking of the solder pads in the steam generator.

[0035] To address the problems of low water efficiency and excessive steam exhaust in existing steam ovens and steam ovens, this application provides a condensation recovery system and a steam oven combo.

[0036] like Figure 1 As shown in the figure, in one embodiment provided in this application, the condensation recovery system includes: a water tank assembly 100, a condensation device 200, an inner liner assembly 300, a preheating assembly 400, an exhaust assembly 500, a first two-position three-way solenoid valve 600, a second two-position three-way solenoid valve 700, a third two-position three-way solenoid valve 800, a wastewater outlet, and a water quality detector 900.

[0037] refer to Figure 1 Combined with the configuration of the first and second two-way three-way solenoid valves 600, the liquid water in the water tank assembly 100 is divided into two paths. The first path of liquid water directly enters the inner tank assembly 300 for evaporation and is ready for use. The second path of liquid water enters the inner tank assembly 300 via the condenser 200 to remove the heat from the condenser 200 so that the steam in the condenser 200 can be condensed. The preheating assembly 400 is connected in series between the condenser 200 and the inner tank assembly 300 to further increase the temperature of the second path of liquid water. In this way, the steam temperature is recovered on the one hand, and the problem of a sudden drop in the amount of steam at the evaporation plate is avoided on the other hand when adding low-temperature water midway.

[0038] refer to Figure 1 The steam flow in the entire system is as follows: Under the negative pressure of the exhaust component 500, excess steam in the inner tank component 300 enters the condenser 200. Under the condensation effect of the condenser 200, the steam changes from a gaseous state to a liquid state and flows back from the condenser 200 to the inner tank, thus realizing condensate recovery and improving water use efficiency.

[0039] refer to Figure 1 Combined with the second two-position three-way solenoid valve 700, the preheating component 400 is not only used to heat liquid water, but also to convert liquid water into high-temperature steam for cleaning the condensing device 200. When a certain amount of oil accumulates in the condensing device 200, causing the quality of the return water to decline, by reducing the amount of water in the preheating component 400 and increasing the preheating temperature of the preheating component 400, high-temperature steam with a certain pressure can be generated instantaneously in the preheating component 400. This high-temperature steam can be used to flush the dirt adhering in the gas passage of the condensing device 200.

[0040] refer to Figure 1 To prevent dirt from flowing back into the inner tank assembly 300 with the condensate, the system incorporates a third two-position three-way solenoid valve 800, a water quality sensor, and a wastewater outlet. When the water quality sensor detects that the backflow water is substandard, the connection between the condensation device 200 and the inner tank assembly 300 is disconnected, and the dirty condensate is discharged from the wastewater outlet.

[0041] In summary, the condensation recovery system of the present invention uses the condensation device 200 to exchange heat between the high-temperature steam discharged from the cooking chamber 301 and the low-temperature liquid water supplied by the water tank: the steam is condensed into liquid water in the airflow channel 201 for recovery, and the liquid water absorbs the residual heat of the steam in the liquid flow channel 202 to rise in temperature, and then flows back to the evaporation zone 302 at the bottom of the cooking chamber 301 through the water inlet 303 to reheat and generate steam, forming a closed loop of "evaporation - exhaust - condensation - preheating and recirculation - re-evaporation". This achieves three benefits: first, the steam is condensed, recovered and recycled, which greatly reduces water consumption and can support long-term cooking without a large-capacity water tank; second, the steam is preferentially condensed inside the system rather than discharged in large quantities, which reduces the risk of scalding from the exhaust steam and the problem of condensation in the air duct; third, the water returning to the cooking chamber 301 has been preheated by the condensation device 200, which significantly reduces the temperature difference between the water inlet and the evaporation zone 302, avoiding the problem of a sudden drop in steam volume caused by injecting cold water at high temperature, and helping to maintain a stable steam volume during the water addition process.

[0042] Please see Figure 2 and Figure 3 The water tank assembly 100 specifically includes a tank body 110 and a water pump 120. The tank body 110 has a drain outlet 101, and the water pump 120 draws liquid water from the tank body 110 from the drain outlet 101 for later use. The inner liner assembly 300 specifically includes an inner liner body and an evaporation plate located at the bottom of the inner liner body. The evaporation plate and the inner liner body together form the boundary of the cooking cavity 301. The inner liner body also has a water inlet 303 and a steam outlet 304 communicating with the cooking cavity 301. The evaporation plate provides an evaporation zone 302 for heating the liquid water at the bottom of the cooking cavity 301 into steam for cooking.

[0043] Please see Figure 4 , Figure 5 and Figure 6 The condensing assembly has an airflow channel 201 and a liquid flow channel 202. The liquid flow channel 202 is heat-transferringly connected to the airflow channel 201 to condense the steam in the airflow channel 201. Specifically, the condensing device 200 includes a housing 210, a water-cooled pipe 220, and a steam distribution plate 230. The housing 210 has a receiving cavity and is provided with an air inlet 203, an exhaust port, a water inlet 205, a water outlet 206, and a cleaning port 207 that communicate with the receiving cavity. The height of the exhaust port 204 is higher than the height of the air inlet 203 so as to form an airflow channel 201 with the receiving cavity and the air inlet 203. The water-cooled pipe 220 is installed on the housing 210, and its two ends are respectively connected to the water inlet 205 and the water outlet 206 to form a liquid flow channel 202. The cleaning port 207 is located at the top of the housing 210 for introducing high-temperature steam.

[0044] like Figure 5As shown, the water-cooled pipe 220 includes multiple stacked rings, with adjacent rings connected end to end to form a spiral structure. This extends the length of the liquid flow channel 202, increases the heat exchange, and allows the liquid water in the liquid flow channel 202 to fully exchange heat with the steam in the air flow channel 201. This improves the condensation effect while reducing the temperature difference between the liquid water in the liquid flow channel 202 and the liquid water in the evaporation plate, ensuring the amount of steam in the cooking cavity 301.

[0045] like Figure 6 As shown, to improve the steam cleaning effect, the condenser 200 also includes a steam distribution plate 230 disposed between the cleaning hole 207 and the water-cooled pipe 220. The steam distribution plate 230 divides the receiving cavity into an upper space and a lower space. The steam distribution plate 230 has multiple steam distribution holes 231, which connect the upper space and the lower space. It is worth noting that, in order to ensure the steam decontamination effect, the density of the steam distribution holes 231 is greater than the arrangement density of the water-cooled pipe 220. Furthermore, some of the steam distribution holes 231 are arranged corresponding to the water-cooled pipe 220, and other steam distribution holes 231 are arranged corresponding to the gap between two adjacent water-cooled pipes 220.

[0046] like Figure 6 As shown, the bottom of the outer casing 210 is also provided with a reflux hole 208. To facilitate reflux, the bottom of the outer casing 210 is also designed with a slope, that is, the bottom surface of the receiving cavity has a guide surface 211 that extends upward from the reflux hole 208. The pipe outside the reflux hole 208 is connected to the water quality detector 900. The water quality detector 900 is also communicatively connected to the third two-position three-way solenoid valve 800. When the water quality detector 900 detects that the water quality of the reflux water is unqualified, it can prompt the user about the water quality, or it can send a signal to the control system of the steam oven. The control system controls the third two-position three-way solenoid valve 800 to open the wastewater outlet to prevent dirty water from entering the inner tank assembly 300 and causing pollution.

[0047] like Figure 7 As shown, the preheating assembly 400 has a preheating chamber 401 and a heating zone 402 disposed in the preheating chamber 401. Specifically, the preheating assembly 400 includes a heating tube and a heat exchanger tube 420 wound around the heating tube. The preheating chamber 401 is provided by the heat exchanger tube 420. The heating tube is U-shaped to facilitate circuit connection. There are a pair of heat exchanger tubes 420, which are wound around the heating tube respectively. This can fully absorb the heat of the heating tube and improve the heat exchange efficiency of the preheating assembly 400.

[0048] In summary, for reference Figure 8 The actual working process of the steam oven designed in this application is as follows: 1. The initial water replenishment of the evaporation zone 302 includes two steps: 1.1 Control the first two-position three-way solenoid valve 600 to connect the water tank assembly 100 and the cooking cavity 301; 1.2 Activate the water pump 120 to transfer a certain amount of purified water from the water tank assembly 100 to the evaporation plate. 2. Switching the water supply line involves five steps: 2.1 After the initial water supply is completed, control the first two-position three-way solenoid valve 600 to switch the outlet, so that the water tank and the condenser 200 are connected; 2.2 Control the second two-position three-way solenoid valve 700 to connect the preheating chamber 401 and the water quality detector 900; 2.3 Control the third two-position three-way solenoid valve 800 to connect the water quality detector 900 and the cooking chamber 301; 2.4 Restart the water pump 120 to continuously transfer clean water from the water tank to the evaporation plate via the condenser 200; 2.5 Activate the heating element 410 in the preheating assembly 400 to heat the flowing liquid water to 90°C. 3. Wastewater testing, specifically including: 3.1 Activating the water quality detector 900 to test the water quality of the return water; 3.2 When the water quality is unqualified, controlling the third two-position three-way solenoid valve 800 to switch the outlet so that the return hole of the condensation device 200 is connected to the wastewater outlet. 4. Cleaning the condenser device 200, specifically including three steps: 4.1 When the water quality detector 900 detects an unqualified result and cooking is completed, control the second two-position three-way solenoid valve 700 to switch the outlet so that the preheating chamber 401 and the airflow channel 201 are connected; 4.2 Control the water pump 120 to reduce the pumping capacity of the water pump 120 and increase the preheating temperature of the preheating component 400, so as to generate high-temperature and high-pressure steam in the preheating chamber 401. The high-temperature and high-pressure steam is used to flush the dirt in the airflow channel 201 and, under the heat exchange effect of the liquid flow channel 202, integrate into the condensate to form "dirty water", which is then discharged from the wastewater outlet through the return hole.

[0049] The smart appliance equipped with the condensation recovery system has a smart voice control module, which includes a controller, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the condensation recovery system to perform corresponding operations, thereby realizing the intelligent control of the condensation recovery system and improving the user experience of using the smart appliance.

[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A condensation recovery system, characterized in that, include: Water tank assembly (100) has a drain outlet (101); The condensing device (200) has an airflow channel (201) and a liquid flow channel (202). The liquid flow channel (202) is heat-transfer connected to the airflow channel (201) for condensing the steam in the airflow channel (201). The liquid flow channel (202) is connected to a drain outlet (101). The inner liner assembly (300) has a cooking chamber (301), a water inlet (303) communicating with the cooking chamber (301), a steam outlet (304) communicating with the cooking chamber (301), and an evaporation zone (302) located at the bottom of the cooking chamber (301). The water inlet (303) is connected to the liquid flow channel (202) for introducing heat-absorbing liquid water. The evaporation zone (302) is used to heat the liquid water in the cooking chamber (301) and generate steam that can be used for cooking. The steam outlet (304) is connected to the air flow channel (201) for discharging the steam in the cooking chamber (301).

2. The condensation recovery system according to claim 1, characterized in that, It also includes a first two-position three-way solenoid valve (600), the inlet of which is connected to the drain outlet (101), and the two outlets of which are respectively connected to the liquid flow channel (202) and the cooking chamber (301).

3. The condensation recovery system according to claim 1, characterized in that, It also includes a preheating component (400), which has a preheating cavity (401), a low-temperature water inlet connected to the preheating cavity (401), a high-temperature water outlet connected to the preheating cavity (401), and a heating zone (402) connected to the preheating cavity (401) for heat transfer. The low-temperature water inlet is connected to the liquid flow channel (202), and the high-temperature water outlet is connected to the cooking cavity (301).

4. The condensation recovery system according to claim 3, characterized in that, The preheating assembly (400) includes an evaporator and a second two-position three-way solenoid valve (700). The preheating chamber (401) is provided by the evaporator. The inlet of the second two-position three-way solenoid valve (700) is connected to the evaporator. One outlet of the second two-position three-way solenoid valve (700) is used as a high-temperature water outlet, and the other outlet of the second two-position three-way solenoid valve (700) is connected to the airflow channel (201) and used as a high-temperature steam outlet.

5. The condensation recovery system according to claim 1, characterized in that, It also includes a third two-position three-way solenoid valve (800), a wastewater outlet, and a water quality detector (900). The inlet of the third two-position three-way solenoid valve (800) is connected to the airflow channel (201) to recover the condensate flowing back in the airflow channel (201). The two outlets of the third two-position three-way solenoid valve (800) are respectively connected to the wastewater outlet and the cooking chamber (301). The water quality detector (900) is communicatively connected to the third two-position three-way solenoid valve (800). The water quality detector (900) is used to detect the water quality of the condensate flowing back. When the water quality is qualified, the third two-position three-way solenoid valve (800) is controlled to switch to connect to the cooking chamber (301). Otherwise, the third two-position three-way solenoid valve (800) is controlled to switch to connect to the wastewater outlet.

6. The condensation recovery system according to any one of claims 1 to 5, characterized in that, The condensation device (200) includes: The outer casing (210) has a receiving cavity and an air inlet (203), an exhaust port, a water inlet (205) and a water outlet (206) communicating with the receiving cavity. The height of the exhaust port is higher than the height of the air inlet (203) so as to form the airflow channel (201) with the receiving cavity and the air inlet (203). A water-cooling pipe (220) is installed on the outer casing (210). The two ends of the water-cooling pipe (220) are respectively connected to the water inlet (205) and the water outlet (206) to form the liquid flow channel (202).

7. The condensation recovery system according to claim 6, characterized in that, The water-cooled pipe (220) includes multiple stacked rings, with adjacent rings connected end to end to form a spiral structure.

8. The condensation recovery system according to claim 7, characterized in that, The outer casing (210) also has a cleaning hole (207) located at the top, which is used to introduce high-temperature steam.

9. The condensation recovery system according to claim 8, characterized in that, The condensing device (200) also includes a steam distribution plate (230) disposed between the cleaning hole (207) and the water cooling pipe (220) to divide the accommodating cavity into an upper space and a lower space. The steam distribution plate (230) has a plurality of steam distribution holes (231) that connect the upper space and the lower space.

10. A steam oven, characterized in that, The condensation recovery system as described in any one of claims 1 to 9 is adopted.

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