Passage control device, cooking appliance and control method of cooking appliance

Abstract

The application discloses a channel control device, a cooking utensil and a control method of the cooking utensil. The channel control device comprises a blocking valve, a driving pump and a control valve. The blocking valve is used for opening or closing a connecting channel communicated with a cooking cavity of the cooking utensil. The driving pump is communicated with the blocking valve through a pipeline to drive the action of the blocking valve. The control valve is arranged in the pipeline and is used for connecting or disconnecting the pipeline. The pipeline is disconnected by the control valve, the keeping of the opening state of the blocking valve is realized, the driving pump does not need to continuously run, the running time of the driving pump in the air exchange process is shortened, the service life of the driving pump is prolonged, the failure rate of the driving pump is reduced, the use cost of the user is reduced, and the use experience of the user is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, and in particular to a passage control device, a cooking utensil and a control method of the cooking utensil. BACKGROUND

[0002] The part provided in this part is only background information related to the present disclosure, which is not necessarily prior art.

[0003] Many cooking utensils (such as electric rice cookers, etc.) are provided with an air extraction device in communication with a cooking cavity of the cooking utensil, the air extraction device comprising a fan and a blocking valve, wherein the fan is in communication with the cooking cavity through an air extraction passage, and the blocking valve is arranged in the air extraction passage (the blocking valve is in a normally closed state), when it is necessary to extract air from the cooking cavity, the blocking valve is opened and the fan is started, and under the action of the fan, the air in the cooking cavity is extracted to meet the cooking requirements of the cooking utensil.

[0004] However, the blocking valve is usually controlled by a drive pump, and when the blocking valve is in an open state, the drive pump needs to be kept in a running state, and long-time running is easy to cause the service life of the drive pump to decrease, thereby increasing the cost of user maintenance and replacement. SUMMARY

[0005] The purpose of the present application is to at least solve the problem of how to prolong the service life of the drive pump. The purpose is achieved by the following technical solutions:

[0006] A first aspect of the present application provides a passage control device for a cooking utensil, the passage control device comprising:

[0007] a blocking valve for opening or closing a connecting passage in communication with a cooking cavity of the cooking utensil;

[0008] a drive pump in communication with the blocking valve through a pipeline to drive the action of the blocking valve;

[0009] a control valve arranged in the pipeline and used to connect or disconnect the pipeline.

[0010] The channel control device according to the present application is used in a cooking appliance, the blocking valve is matched with the body of the cooking appliance and is used to open or close the connecting channel of the cooking appliance, the driving pump is communicated with the blocking valve through a pipeline, and the control valve is arranged on the pipeline. When it is needed to control the cooking cavity by using the channel control device (material feeding or air exchange), the control valve is opened, the driving pump drives the fluid to drive the blocking valve to act, so that the connecting channel is opened. After the blocking valve is opened for a certain time, the control valve is closed, the driving pump is closed, and the fluid in the pipeline between the control valve and the blocking valve is used to keep the blocking valve in the opened state. When the control of the cooking cavity is completed (the material feeding is completed or the air exchange is completed), the control valve is opened again and the driving pump is started, so that the driving pump drives the fluid to operate reversely, so as to close the connecting channel.

[0011] The pipeline is disconnected by using the control valve, the keeping of the blocking valve in the opened state is realized, the driving pump does not need to continuously operate, the operation time of the driving pump in the control process of the cooking cavity is shortened, the service life of the driving pump is prolonged, the failure rate of the driving pump is reduced, the use cost of the user is reduced, and the use experience of the user is improved.

[0012] In addition, the channel control device according to the present application can also have the following additional technical features:

[0013] In some embodiments of the present application, the blocking valve comprises:

[0014] a valve seat, a cavity being arranged on the valve seat and being communicated with the pipeline;

[0015] a valve rod, one end of the valve rod being movably arranged in the cavity;

[0016] a valve core, the valve core being arranged at the other end of the valve rod and being used to open or close the inlet of the connecting channel.

[0017] In some embodiments of the present application, the blocking valve further comprises elastic members, the elastic members are matched with the valve seat and the valve rod respectively, and the elastic force of the elastic members is used to keep the valve core at the position of closing the inlet.

[0018] In some embodiments of the present application, the elastic members are springs arranged in the cavity.

[0019] And / or the driving pump is a gas pump.

[0020] And / or the control valve is an electromagnetic valve.

[0021] And / or the channel control device comprises an air fan, the air fan is used to be communicated with the outlet of the connecting channel, and the air fan is arranged to extract the air in the cooking cavity.

[0022] The second aspect of the present application provides a cooking appliance, which comprises:

[0023] a body provided with a cooking cavity and a connecting channel communicated with the cooking cavity;

[0024] a controller arranged in the body;

[0025] According to the channel control device as described above, at least part of the body of the blocking valve of the channel control device is arranged in the connecting channel, the fan of the channel control device is communicated with the outlet of the connecting channel, and the fan, the driving pump of the channel control device and the control valve of the channel control device are respectively electrically connected with the controller.

[0026] According to the cooking appliance of the present application, when it is necessary to control the cooking cavity by using the channel control device (material feeding or air exchange), under the control of the controller, the fan is started, the control valve is opened, the driving pump drives the fluid to drive the blocking valve to act, so as to open the connecting channel, after the blocking valve is opened for a certain time, the control valve is closed, the driving pump is closed, and the fluid in the pipeline between the control valve and the blocking valve is used to keep the blocking valve in the open state, when the control of the cooking cavity is completed (the material feeding is completed or the air exchange is completed), the control valve is opened again and the driving pump is started, so that the driving pump reversely drives the fluid to run, so as to close the connecting channel, and the fan stops running.

[0027] The pipeline is disconnected by using the control valve, the keeping of the blocking valve in the open state is realized, the driving pump does not need to continuously run, the running time of the driving pump in the control process of the cooking cavity is shortened, the service life of the driving pump is prolonged, the failure rate of the driving pump is reduced, the use cost of the user is reduced, and the use experience of the user is improved.

[0028] The third aspect of the present application provides a control method of a cooking appliance, which is used for controlling the cooking appliance as described above, and comprises the following steps:

[0029] starting the fan according to the received cooking cavity control instruction;

[0030] switching the state of the control valve to connect the pipeline between the driving pump and the blocking valve;

[0031] opening the driving pump to drive the blocking valve to switch to the open state;

[0032] acquiring the opening time length of the blocking valve;

[0033] switching the state of the control valve to disconnect the pipeline between the driving pump and the blocking valve, and closing the driving pump according to that the opening time length of the blocking valve reaches a first preset time length;

[0034] According to the control completion state of the cooking cavity, the state of the control valve is switched to connect the pipeline between the driving pump and the blocking valve, the driving pump is opened, and the blocking valve is switched to the closed state.

[0035] According to the control method of the cooking utensil, the pipeline is disconnected by the control valve, the keeping of the open state of the blocking valve is realized, the driving pump does not need to run continuously, the running time of the driving pump in the control process of the cooking cavity is shortened, the service life of the driving pump is prolonged, the failure rate of the driving pump is reduced, the use cost of the user is reduced, and the use experience of the user is improved.

[0036] In some embodiments of the present application, between the step of switching the state of the control valve to disconnect the pipeline between the driving pump and the blocking valve and closing the driving pump according to the open time of the blocking valve reaching the first preset time and the step of switching the state of the control valve to connect the pipeline between the driving pump and the blocking valve, opening the driving pump, and driving the blocking valve to switch to the closed state according to the cooking cavity being in the heat dissipation completion state, the following steps are further included:

[0037] According to the preset frequency, the pipeline is connected or disconnected, and the time interval of the preset frequency is the second preset time;

[0038] According to the open state of the pipeline between the driving pump and the blocking valve, the driving pump is opened to keep the blocking valve in the open state.

[0039] In some embodiments of the present application, in the step of starting the fan according to the received cooking cavity control instruction, the control instruction of the cooking cavity is a cooking cavity heat dissipation instruction, and in the step of switching the state of the control valve to connect the pipeline between the driving pump and the blocking valve, the following steps are included:

[0040] The fan is controlled to run at a low speed;

[0041] According to the time length of the fan running being greater than or equal to the time threshold, the state of the control valve is switched to connect the pipeline between the driving pump and the blocking valve.

[0042] In some embodiments of the present application, after the step of opening the driving pump to drive the blocking valve to switch to the open state, the following step is further included: adjusting the fan to run at a high speed.

[0043] In some embodiments of the present application, in the step of switching the state of the control valve to connect the pipeline between the driving pump and the blocking valve, opening the driving pump, and driving the blocking valve to switch to the closed state according to the control completion state of the cooking cavity, the control completion state of the cooking cavity is the heat dissipation completion state, and the following steps are included:

[0044] The current heat dissipation time is obtained;

[0045] The current temperature of the cooking cavity is obtained;

[0046] compare the current heat dissipation duration with the preset heat dissipation duration, and compare the current temperature with the preset temperature;

[0047] determine that the cooking cavity is in the heat dissipation completion state according to the current heat dissipation duration being equal to the preset heat dissipation duration, or the current heat dissipation duration being less than the preset heat dissipation duration and the current temperature being lower than the preset temperature;

[0048] switch the state of the control valve to connect the pipeline between the driving pump and the block valve;

[0049] turn on the driving pump to drive the block valve to switch to the closed state;

[0050] turn off the driving pump and the fan, and switch the control valve to the reset state. BRIEF DESCRIPTION OF DRAWINGS

[0051] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a better understanding of the preferred embodiments, and are not to be considered limitations of the present application. Moreover, in the drawings, like reference numerals refer to similar components throughout the several views. In the drawings:

[0052] Figure 1 schematically shows a structural schematic view of a cooking appliance according to an embodiment of the present application in a first state;

[0053] Figure 2 schematically shows a structural schematic view of the cooking appliance shown in Figure 1 in a second state (the face cover is not shown);

[0054] Figure 3 schematically shows a sectional view of the cooking appliance shown in Figure 1 along line A-A;

[0055] Figure 4 schematically shows an enlarged structural schematic view of part B of the cooking appliance shown in Figure 3 in a first state (the block valve is in the open state);

[0056] Figure 5 schematically shows an enlarged structural schematic view of part B of the cooking appliance shown in Figure 3 in a second state (the block valve is in the closed state);

[0057] Figure 6 schematically shows a flow chart of a control method of a cooking appliance according to an embodiment of the present application;

[0058] Figure 7 schematically shows a logic diagram of a control method of a cooking appliance according to an embodiment of the present application.

[0059] The reference numerals are as follows:

[0060] 100 is a cooking utensil;

[0061] 10 is a body;

[0062] 11 is an upper cover;

[0063] 111 is a face cover, 112 is an inner cover, and 113 is a connecting passage;

[0064] 12 is a steamer;

[0065] 13 is a pot body;

[0066] 131 is a cooking cavity;

[0067] 14 is a pot body;

[0068] 20 is a passage control device;

[0069] 21 is a driving pump;

[0070] 22 is a pipeline;

[0071] 23 is a control valve;

[0072] 24 is a fan;

[0073] 25 is a block valve;

[0074] 251 is a valve seat, 2511 is a cavity, 252 is a valve rod, 253 is an elastic member, and 254 is a valve core. DETAILED DESCRIPTION

[0075] Example embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings; however, they are not intended to limit the present disclosure to particular embodiments. Rather, the intention is to convey the concept of the present disclosure to a technical person skilled in the art with the best mode for carrying out the present disclosure.

[0076] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0077] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0078] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "below" another element or feature would then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0079] like Figures 1 to 7 As shown, according to an embodiment of the present invention, a channel control device 20 is proposed for use with a cooking appliance 100. The channel control device 20 includes a blocking valve 25, a driving pump 21 and a control valve 23. The blocking valve 25 is used to open or close the connecting channel 113 connected to the cooking cavity 131 of the cooking appliance 100. The driving pump 21 is connected to the blocking valve 25 through a pipeline 22 to drive the operation of the blocking valve 25. The control valve 23 is provided in the pipeline 22 and is used to connect or disconnect the pipeline 22.

[0080] Specifically, the passage control device 20 is used for the cooking appliance 100, the block valve 25 cooperates with the body 10 of the cooking appliance 100 and is used for opening or closing the connecting passage 113 of the cooking appliance 100, the driving pump 21 is communicated with the block valve 25 through the pipeline 22, and the control valve 23 is arranged on the pipeline 22. When it is needed to control the cooking cavity 131 by using the passage control device 20 (putting material or air exchange), the control valve 23 is opened (the pipeline 22 between the driving pump 21 and the block valve 25 is in a communication state), the driving pump 21 drives the fluid to drive the block valve 25 to act, so as to open the connecting passage 113, after the block valve 25 is opened for a certain time, the control valve 23 is closed (the pipeline 22 between the driving pump 21 and the block valve 25 is in a disconnected state), the driving pump 21 is closed, and the block valve 25 is kept in an open state by using the fluid in the pipeline 22 between the control valve 23 and the block valve 25, when the control of the cooking cavity 131 is completed (the material putting is completed or the air exchange is completed), the control valve 23 is opened again (the pipeline 22 between the driving pump 21 and the block valve 25 is in a communication state), and the driving pump 21 is started again, so that the driving pump 21 reversely drives the fluid to operate, so as to close the connecting passage 113.

[0081] The pipeline 22 is disconnected by using the control valve 23, the keeping of the block valve 25 in the open state is realized, the driving pump 21 does not need to continuously operate, the operation time of the driving pump 21 in the control process of the cooking cavity 131 is shortened, the service life of the driving pump 21 is prolonged, the failure rate of the driving pump 21 is reduced, the use cost of the user is reduced, and the use experience of the user is improved.

[0082] It should be noted that the block valve 25 being opened for a certain time refers to a period of time (which can be artificially set) after the block valve 25 is in an open state, at this time, it is ensured that the block valve 25 is opened in place and the air in the cooking cavity 131 can be effectively discharged through the exhaust passage.

[0083] In addition, during the process of ventilating the cooking cavity 131 of the cooking appliance 100 by the channel control device 20, the control valve 23 can be kept in a continuous closed state (the pipeline 22 between the driving pump 21 and the blocking valve 25 is in a disconnected state, and at this time, the driving pump 21 is also in a stopped running state), or the control valve 23 can be turned on and off at intervals (when the control valve 23 is turned on, the driving pump 21 is started and supplies fluid to the blocking valve 25). In the embodiment of the present application, the control valve 23 and the driving pump 21 are started at intervals (the interval time can be artificially set), that is, after the control valve 23 is closed for a period of time (the driving pump 21 is in a stopped running state), the control valve 23 is opened (the driving pump 21 is started again). By using this kind of way, the opening effect of the blocking valve 25 can be effectively guaranteed, and the situation that the blocking valve 25 is closed due to the leakage of the fluid stored between the blocking valve 25 and the control valve 23 can be avoided, thereby guaranteeing the control effect on the cooking cavity 131.

[0084] It is further understood that, as shown in Figures 3 to 5 The blocking valve 25 includes a valve seat 251, a valve rod 252 and a valve core 254. The valve seat 251 is arranged in the connecting channel 113, and the valve seat 251 is provided with a cavity 2511 which is in communication with the pipeline 22. One end of the valve rod 252 is movably arranged in the cavity 2511, and the valve core 254 is arranged at the other end of the valve rod 252 and used for opening or closing the inlet of the connecting channel 113. Specifically, one end of the valve rod 252 is arranged in the cavity 2511 of the valve seat 251, and the valve core 254 is arranged at the other end of the valve rod 252. The valve rod 252 can move relative to the valve seat 251, and the control of the valve core 254 is realized by the movement of the valve rod 252. The valve core 254 has a state of opening the connecting channel 113 and a state of closing the connecting channel 113. When it is needed to open the connecting channel 113, the driving pump 21 sends fluid (gas or liquid) into the cavity 2511. With the injection of the fluid in the cavity 2511, the pressure of the fluid is increased, and the high-pressure fluid acts on the other end of the valve rod 252 which is located in the cavity 2511, thereby pushing the valve rod 252 to move relative to the valve seat 251. The movement of the valve rod 252 drives the position of the valve core 254 to change, so as to open the connecting channel 113. When it is needed to close the connecting channel 113, the driving pump 21 can reversely extract the fluid in the cavity 2511. With the decrease of the pressure of the fluid in the cavity 2511, the valve rod 252 drives the valve core 254 to move, so as to close the connecting channel 113. By using the driving pump 21 to control the blocking valve 25, the control precision is high and the accuracy is good.

[0085] In addition, in the embodiment of the present application, the valve core 254 is arranged outside the connecting channel 113, when the blocking valve 25 closes the connecting channel 113, the valve core 254 abuts against and blocks the position of the connecting channel 113 and the inlet of the cooking cavity 131, when the blocking valve 25 opens the connecting channel 113, the valve core 254 is separated from the inlet, by arranging the valve core 254 outside the connecting channel 113, the cleaning of the valve core 254 is ensured, and the situation that the valve core 254 is stuck to cause the blocking valve 25 to fail is avoided.

[0086] Further, as shown in Figures 3 to 5 the blocking valve 25 further comprises elastic members 253, the elastic members 253 are matched with the valve seat 251 and the valve rod 252 respectively, the elastic force of the elastic members 253 is used to keep the valve core 254 at the position of closing the inlet. Specifically, when the control valve 23 is in the open state, the driving pump 21 delivers fluid into the cavity 2511 of the valve seat 251, as the fluid is continuously injected, the fluid pressure in the cavity 2511 is continuously increased, when the pressure of the fluid is greater than the elastic force of the elastic members 253, the high-pressure fluid drives the other end of the valve rod 252 in the cavity 2511 to move relative to the cavity 2511, so as to push the valve rod 252 to move relative to the valve seat 251, in the process of moving, the valve rod 252 acts on the elastic members 253, so that the elastic members 253 are elastically deformed, the movement of the valve rod 252 drives the position of the valve core 254 to change, so as to open the connecting channel 113; when it is needed to close the connecting channel 113, the driving pump 21 can reversely draw out the fluid in the cavity 2511, the fluid pressure in the cavity 2511 is reduced, when the pressure of the fluid is less than the elastic force of the elastic members 253, the spring drives the valve rod 252 to reversely move, so that the valve rod 252 drives the valve core 254 to move, so as to close the connecting channel 113. By arranging the elastic members 253, the automatic reset of the valve core 254 is realized, and the blocking effect of the blocking valve 25 on the connecting channel 113 is ensured.

[0087] It should be pointed out that, in other embodiments of the present application, the blocking valve 25 comprises a valve seat 251, a valve core 254 and a driving member (which can be a motor or the like), wherein the valve seat 251 is arranged in the connecting channel 113, the valve core 254 is arranged on the valve seat 251 in a rotatable manner and is in transmission connection with the driving member, and the valve core 254 is provided with a through hole, when it is needed to open the connecting channel 113, the driving member drives the valve core 254 to rotate, so that the through hole is in communication with the connecting channel 113, at this time, the spaces on both sides of the connecting channel 113 are in communication, when it is needed to close the connecting channel 113, the driving member drives the valve core 254 to rotate, so that the through hole is not in communication with the connecting channel 113, at this time, the spaces on both sides of the connecting channel 113 are not in communication.

[0088] In some embodiments of the present application, as Figures 3 to 5As shown, the elastic member 253 is a spring, which is arranged in the cavity 2511, one end of the spring is fixedly connected with the inner wall of the cavity 2511, and the other end of the spring is fixedly connected with the other end of the valve rod 252 located in the cavity 2511. In the natural state, the spring makes the valve rod 252 drive the valve core 254 to close the connecting channel 113. When it is needed to open the connecting channel 113, the driving pump 21 sends fluid into the cavity 2511, the pressure in the cavity 2511 is increased, and the high-pressure fluid acts on the valve rod 252. When the pressure of the high-pressure fluid is greater than the elastic force of the spring, the valve rod 252 is pushed to move relative to the valve seat 251, the spring is elastically deformed, and the movement of the valve rod 252 drives the position of the valve core 254 to change, so as to open the connecting channel 113. When it is needed to close the connecting channel 113, the driving pump 21 reverses the operation, the pressure in the cavity 2511 is reduced, and when the pressure is less than the elastic force of the spring, the spring restores the elastic deformation, thereby driving the valve rod 252 to move, so that the valve core 254 abuts against the inlet of the connecting channel 113 and the cooking cavity 131 and closes the inlet, so as to close the connecting channel 113.

[0089] In some embodiments of the application, the elastic member 253 is a spring rope, which is arranged and works similarly to the spring. For details, refer to the example of the spring, and the example will not be repeated here.

[0090] In some embodiments of the application, the driving pump 21 is a gas pump. When it is needed to open the connecting channel 113, the gas pump sends gas into the cavity 2511, the gas pressure in the cavity 2511 is increased, and the high-pressure gas acts on the other end of the valve rod 252 located in the cavity 2511. When the gas pressure is greater than the elastic force of the spring (for example, the elastic member 253 is a spring), the valve rod 252 is pushed to move relative to the valve seat 251, the spring is elastically deformed, and the movement of the valve rod 252 drives the position of the valve core 254 to change, so as to open the connecting channel 113. When it is needed to close the connecting channel 113, the gas pump can reversely extract the gas in the cavity 2511. When the gas pressure in the cavity 2511 is less than the elastic force of the spring, the spring restores the elastic deformation, thereby driving the valve rod 252 to move, so that the valve core 254 closes the connecting channel 113. The gas pump is used to control the sealing valve 25, which has a fast response speed and shortens the control time.

[0091] In some embodiments of the application, the driving member is a water pump (not shown) which is in communication with a water box. The water pump is in communication with the sealing valve 25 through a water pipe, and the working principle of the water pump is similar to that of the gas pump. For details, refer to the example of the gas pump, and the example will not be repeated here.

[0092] In some embodiments of the present application, the control valve 23 is an electromagnetic valve, which is arranged on the pipeline 22 communicated with the drive part and the block valve 25. The opening and closing of the electromagnetic valve is used to realize the communication and disconnection of the pipeline 22. When the block valve 25 needs to be opened, the control valve 23 is in an open state, and the drive pump 21 can deliver fluid to the block valve 25 to drive the block valve 25 to open. Then the control valve 23 is closed. At this time, the drive pump 21 and the block valve 25 are in a disconnected state, and the pipeline 22 between the block valve 25 and the control valve 23 is sealed with fluid. The fluid has a certain pressure and can keep the block valve 25 open. At this time, the drive pump 21 can be stopped to reduce the running time of the drive pump 21, so that the service life of the drive pump 21 is prolonged. The control valve 23 is arranged as an electromagnetic valve, which has small volume and is convenient for layout and installation. In addition, the electromagnetic valve has high speed, which effectively guarantees the on-off effect of the pipeline 22.

[0093] In some embodiments of the present application, the control valve 23 is an electric valve, which is similar to the electromagnetic valve in principle (only different in driving structure). For details, please refer to the example of the control valve 23 being an electromagnetic valve. Here, the example will not be described again.

[0094] In some embodiments of the present application, the channel control device 20 further comprises a fan 24, which is arranged in communication with the outlet of the connecting channel 113. The fan 24 is arranged to extract air in the cooking cavity 131, and uses the fan to provide power for ventilation of the cooking cavity 131, thereby improving the ventilation efficiency of the cooking cavity 131.

[0095] In addition, the fan 24 can be arranged to extract air from the cooking cavity 131, or arranged to blow air into the cooking cavity 131, or arranged to provide power for automatic material feeding of the cooking cavity 131.

[0096] As shown in Figures 1 to 7 It is further proposed in the present application that a cooking appliance 100 comprises a body 10, a controller, and a channel control device 20 according to the above. The body 10 is provided with a cooking cavity 131 and a connecting channel 113 communicated with the cooking cavity 131. The controller is arranged on the body 10. At least part of the body of the block valve 25 of the channel control device 20 is arranged in the connecting channel 113. The fan 24 of the channel control device 20 is in communication with the outlet of the connecting channel 113. The fan 24, the drive pump 21 of the channel control device 20, and the control valve 23 of the channel control device 20 are respectively electrically connected with the controller.

[0097] Specifically, when it is needed to control the cooking cavity 131 by the channel control device 20 (putting in materials or air exchange), under the control of the controller, the fan 24 is started, the control valve 23 is opened, the driving pump 21 drives the fluid to drive the sealing valve 25 to act, so as to open the connecting channel 113, after the sealing valve 25 is opened for a certain time, the control valve 23 is closed, the driving pump 21 is closed, and the sealing valve 25 is kept in the open state by the fluid in the pipeline 22 between the control valve 23 and the sealing valve 25, when the control of the cooking cavity 131 is completed (the materials are put in or the air exchange is completed), the control valve 23 is opened again, and the driving pump 21 is started again, so that the driving pump 21 drives the fluid to operate reversely, so as to close the connecting channel 113, and the fan 24 stops operating.

[0098] The pipeline 22 is disconnected by the control valve 23, the sealing valve 25 in the open state is kept, the driving pump 21 does not need to operate continuously, the operation time of the driving pump 21 in the control process of the cooking cavity 131 is shortened, the service life of the driving pump 21 is prolonged, the failure rate of the driving pump 21 is reduced, the use cost of the user is reduced, and the use experience of the user is improved.

[0099] In the embodiment of the application, the cooking utensil 100 is further provided with an air inlet channel which communicates with the cooking cavity 131.

[0100] In some cooking modes of the embodiment, it is needed to cool the food materials in the cooking cavity 131 by the channel control device 20 (for example, making low-sugar rice or palatable porridge), for example, in the case of making low-sugar rice, the rice in the cooking cavity 131 needs to be cooled before being cooked, so as to improve the content of resistant starch in the rice, in the cooling process, under the action of the channel control device 20, the high-temperature gas in the cooking cavity 131 is extracted through the connecting channel 113, and the low-temperature air outside enters the cooking cavity 131 through the air inlet channel (the air inlet channel is in the open state), and the circulation of the air flow is utilized to cool the rice in the cooking cavity 131, so as to meet the cooking requirement.

[0101] In some cooking modes of the present embodiment, when forced exhaust of the cooking cavity 131 is required (for example, there are generally two types of rice on the market, one is fresh rice of the season or the year, and the other is old rice, that is, rice more than one year old, if the old rice is not treated during cooking, the cooked rice may have other odors such as rice bran, and the gas in the cooking cavity 131 is replaced during cooking to achieve live rice, thereby achieving the effect of removing old rice and making it fragrant), under the action of the control valve 23 and the drive pump 21, the control valve 25 is opened to open the connecting channel 113, thereby realizing that the air in the cooking cavity 131 enters the outside in turn through the connecting channel 113, and after the exhaust is completed, under the action of the control valve 23 and the drive pump 21, the exhaust valve 25 is closed.

[0102] In some cooking modes of the present embodiment, the air in the cooking cavity 131 needs to be replaced by the channel control device 20 to reduce the pressure in the cooking cavity 131, for example, when high-pressure cooking, if the cooking cavity 131 needs to be quickly opened, the pressure in the cooking cavity 131 needs to be quickly reduced, at this time the air inlet channel is in a closed state, under the action of the channel control device 20, the gas in the cooking cavity 131 is extracted through the connecting channel 113 to reduce the pressure in the cooking cavity 131, thereby realizing the quick opening of the cooking cavity 131.

[0103] In some embodiments of the present application, the body 10 includes a pot body 14, a pan body 13, and an upper cover 11 (the upper cover 11 includes a face cover 111 and an inner cover 112), the pan body 13 is arranged in the pot body 14, the inside of the pan body 13 forms a cooking cavity 131, the cooking cavity 131 is communicated with the outside through the opening of the pan body 13, and the upper cover 11 is matched with the pot body 14 in an opening and closing manner to open or close the opening.

[0104] In some embodiments of the present application, as shown in Figure 3 The body 10 further includes a steamer 12 which is arranged in the inside of the pan body 13 in a separable manner (the steamer 12 is arranged in a spaced manner with the inner bottom surface of the pan body 13), the steamer 12 and the pan body 13 can be used to cook two different food materials, or the steamer 12 and the pan body 13 can be used to cook one food material to obtain two kinds of food, thereby meeting the eating needs of different users and improving the user experience.

[0105] In some embodiments of the present application, the body 10 does not include the steamer 12, the food material is placed in the pan body 13 during cooking, and the food is cooked by heating, the steamer 12 is not arranged in the pan body 13, the volume of the pan body 13 can be increased, and the single cooking capacity of the cooking appliance 100 is guaranteed.

[0106] It should be noted that the pot body 13 and the pot body 14 can be a fixed structure or a separable structure. In the embodiment, the pot body 14 is provided with a receiving cavity (a heating assembly is arranged in the receiving cavity, for example, a heating tube, an IH coil, a heating disc, etc.), and the pot body 13 is arranged in the receiving cavity in a separable manner. When the cooking is completed, the user can separate the pot body 13 from the pot body 14, thereby improving the convenience of the user during use.

[0107] In some examples of the embodiment, the connecting channel 113 is arranged on the upper cover 11 (the connecting channel 113 can be integrated inside the upper cover 11 or formed on a conductive member arranged in the upper cover 11), and the connecting channel 113 penetrates the side of the upper cover 11 facing the opening of the pot body 13 (the upper cover 11 is in a closed state relative to the pot body 14). When the upper cover 11 closes the cooking cavity 131, the connecting channel 113 can be ensured to communicate with the cooking cavity 131. The connecting channel 113 is arranged on the upper cover 11, thereby improving the convenience of exhausting the cooking cavity 131.

[0108] It should be understood that the shape of the connecting channel 113 formed on the upper cover 11 and the entrance of the cooking cavity 131 can be square, circular, or other regular or irregular shapes.

[0109] It should be noted that the driving pump 21, the control valve 23, and the fan 24 can be arranged in the upper cover 11 or the pot body 14.

[0110] In some examples of the embodiment, the cooking utensil 100 further comprises a food material storage device, which communicates with the connecting channel 113 (the connecting channel 113 is arranged in the upper cover 11 of the cooking utensil 100). The receiving cavity 2511 is arranged at a position where the connecting channel 113 communicates with the cooking cavity 131 (on the side of the blocking valve 25 away from the cooking cavity 131). In the closed state of the blocking valve 25, the fan 24 is started, a negative pressure is formed in the connecting channel 113, and the food material (rice, etc.) in the food material storage device is sucked into the receiving cavity 2511. The fan 24 stops running, the blocking valve 25 is opened, and the food material enters the cooking cavity 131 through the connecting channel 113 under the action of gravity, thereby realizing automatic feeding of the food material in the cooking cavity 131, and realizing automatic cooking, so that the user's convenience is improved.

[0111] As shown in Figures 1 to 7 The application further provides a control method of the cooking utensil 100, which is used for controlling the cooking utensil 100 according to the above. The control method of the cooking utensil 100 is specifically used for controlling the channel control device 20 of the cooking utensil 100.

[0112] The control method comprises: starting the fan 24 according to the received cooking cavity 131 control instruction; switching the state of the control valve 23 to connect the pipeline between the driving pump 21 and the block valve 25; opening the driving pump 21 to drive the block valve 25 to switch to the open state; obtaining the opening duration of the block valve 25; according to the opening duration of the block valve 25 reaching the first preset duration, switching the state of the control valve 23 to disconnect the pipeline between the driving pump 21 and the block valve 25, and closing the driving pump 21; according to the preset frequency, connecting or disconnecting the pipeline, and the time interval of the preset frequency is the second preset duration; according to the pipeline between the driving pump 21 and the block valve 25 being in the connected state, opening the driving pump 21 to keep the block valve 25 in the open state; and according to the cooking cavity 131 being in the control completion state, switching the state of the control valve 23 to connect the pipeline between the driving pump 21 and the block valve 25, and opening the driving pump 21 to drive the block valve 25 to switch to the closed state.

[0113] The cooking cavity 131 control instruction can be a cooking cavity 131 heat dissipation instruction or a cooking cavity 131 feeding instruction. When the cooking cavity 131 control instruction is the cooking cavity 131 heat dissipation instruction, the cooking cavity 131 control completion state is a cooking cavity 131 heat dissipation completion state, and the control method can be used to control the cooking cavity 131 heat dissipation process. When the cooking cavity 131 control instruction is the cooking cavity 131 feeding instruction, the cooking cavity 131 control completion state is a cooking cavity 131 feeding completion state, and the control method can be used to control the cooking cavity 131 feeding process.

[0114] The cooking appliance 100 and the control method of the cooking appliance 100 are used to cook food, and the channel control device 20 is an air exchange device.

[0115] During the cooking process, the food in the cooking cavity 131 needs to be cooled (such as cooking low-sugar rice or palatable porridge), so as to meet the cooking requirements. The food in the cooking cavity 131 is cooled by the channel control device 20 to extract high-temperature gas in the cooking cavity 131. During the air exchange process using the channel control device 20, the following steps are included:

[0116] S1: According to the received cooking cavity 131 heat dissipation instruction, start the fan 24.

[0117] Specifically, the cooking appliance 100 operates in a corresponding cooking mode, the timing module of the cooking appliance 100 is used to time the cooking time, and the result is fed back to the controller of the cooking appliance 100, the controller compares the current cooking time with the preset cooking time corresponding to the corresponding cooking mode, if the current cooking time reaches the heat dissipation time node in the preset cooking time, the cooking appliance 100 enters the heat dissipation stage, the controller sends a start instruction to the fan 24, and the fan 24 receives and starts according to the start instruction. At this time, the blocking valve 25 is in a state of closing the connecting channel 113, and the fan 24 starts to pre-ventilate the residual gas (water vapor and high-temperature gas flow, etc.) in the connecting channel 113, so as to avoid the residual gas entering other parts of the cooking appliance 100 and affecting the performance of the cooking appliance 100 (for example, water vapor causes electrical control element failure, etc.), thereby reducing the failure rate of the cooking appliance 100 and reducing the use cost of the user.

[0118] It should be pointed out that when pre-ventilating the connecting channel 113, a preset ventilation time needs to be set, which can be 20s, 30s or 40s, etc. The preset ventilation time can be set according to different use scenarios, which will not be described here.

[0119] S2: Switch the state of the control valve 23 to connect the pipeline 22 between the driving pump 21 and the blocking valve 25.

[0120] Specifically, the collection module of the cooking appliance 100 collects the running time of the fan 24, and feeds the running time of the fan 24 to the controller, the controller receives the running time of the fan 24, and compares the running time of the fan 24 with the time threshold, when the running time of the fan 24 is less than the time threshold, the controller determines that the pre-ventilation of the fan 24 is not completed, and continues to maintain the current state of the channel control device 20; when the running time of the fan 24 is greater than or equal to the time threshold, the controller determines that the pre-ventilation of the fan 24 is completed, the controller sends a control valve 23 state switching instruction, the control valve 23 receives the instruction and switches the state, so that the pipeline 22 between the driving pump 21 and the blocking valve 25 is in a connected state, at this time the driving pump 21 can drive the blocking valve 25.

[0121] It should be pointed out that when the fan 24 is in low-speed operation, the rotating speed of the fan 24 is between 2000-4000r / min, so as to effectively reduce the energy consumption of the fan 24 while ensuring the suction effect of the residual gas in the connecting channel 113, thereby reducing the use cost of the user.

[0122] In addition, the time threshold can be set according to specific application scenarios, for example, 3s, 5s, 8s, etc.

[0123] S3: Turn on the driving pump 21 to drive the block valve 25 to switch to the open state.

[0124] Specifically, the timing module of the cooking appliance 100 collects the running time of the fan 24 and sends it to the controller. The controller compares the running time of the fan 24 with the preset ventilation time. When the running time of the fan 24 reaches the preset ventilation time, the controller sends a start instruction to the driving pump 21. After receiving the start instruction, the driving pump 21 starts. The driving pump 21 delivers fluid to the block valve 25. With the continuous delivery of fluid, the pressure of the fluid in the block valve 25 rises. Under the action of fluid pressure, the block valve 25 switches from the initial closed state (closed connection channel 113) to the open state (open connection channel 113), so that the connection channel 113 is opened. Under the action of the fan 24, high-temperature gas in the cooking cavity 131 can be extracted through the connection channel 113. The controller sends an instruction to adjust the speed of the fan 24 to high-speed operation. After receiving the instruction, the fan 24 increases the speed to high speed, thereby improving the suction capacity of the fan 24, and further ensuring the suction capacity of the high-temperature gas in the cooking cavity 131, so that the cooling effect of the food in the cooking cavity 131 is guaranteed.

[0125] It should be pointed out that when the fan 24 is in low-speed operation, the speed of the fan 24 is between 4000 and 9000 r / min, so that the fan 24 is in high-speed operation, thereby ensuring the suction effect of the gas in the cooking cavity 131.

[0126] S4: Obtain the opening time of the block valve 25.

[0127] Specifically, the timing module of the cooking appliance 100 times the opening time of the block valve 25 and feeds back the timing result to the controller of the cooking appliance 100. The controller receives the opening time of the block valve 25, compares the opening time of the block valve 25 with the preset time, and further controls the control valve 23 and the driving pump 21 according to the comparison result, thereby improving the control precision, reducing the running time of the driving pump 21 while ensuring the opening effect of the block valve 25, thereby reducing the failure rate of the driving pump 21 and prolonging the service life of the driving pump 21.

[0128] S5: According to the opening time of the block valve 25 reaching the first preset time, switch the state of the control valve 23 to disconnect the pipeline 22 between the driving pump 21 and the block valve 25, and turn off the driving pump 21.

[0129] Specifically, the control valve 23 is switched to a state of connecting the pipeline 22 between the driving pump 21 and the blocking valve 25, the driving pump 21 drives the blocking valve 25 through the pipeline 22 to switch the blocking valve 25 from the closed state to the open state, the timing module of the cooking utensil 100 counts the opening time of the blocking valve 25 and feeds back to the controller, the controller compares the opening time of the blocking valve 25 with the preset time, when the opening time of the blocking valve 25 reaches the first preset time, it indicates that the blocking valve 25 has been in a stable open state, the controller sends a state switching instruction to the control valve 23, the control valve 23 receives the instruction and switches to a state of disconnecting the pipeline 22 between the driving pump 21 and the blocking valve 25, at this time the driving pump 21 is disconnected with the blocking valve 25, the control valve 23 sends a closing instruction to the driving pump 21, the driving pump 21 receives the closing instruction and stops running, when the pipeline 22 between the driving pump 21 and the blocking valve 25 is in a disconnected state, the fluid sealed in the body of the pipeline 22 between the blocking valve 25 and the control valve 23 maintains the opening effect of the blocking valve 25 to ensure the smooth progress of the aeration, at this time the driving pump 21 is stopped running, which avoids the continuous running of the driving pump 21, reduces the failure rate of the driving pump 21, and effectively prolongs the service life of the driving pump 21.

[0130] It should be pointed out that in the embodiments of the present application, the first preset time is 5-20s to ensure that the blocking valve 25 is in a stable open state. In other embodiments of the present application, the first preset time can be set according to specific application scenarios, which will not be described here.

[0131] In addition, when the driving pump 21 and the control valve 23 are both stopped running, the controller of the cooking utensil 100 switches the state of the control valve 23 according to a preset frequency, so that the pipeline 22 between the driving pump 21 and the blocking valve 25 is switched between the connected and disconnected states according to the preset frequency, and the time interval of the preset frequency is a second preset time. The state of the control valve 23 is intermittently switched, and when the pipeline 22 between the driving pump 21 and the blocking valve 25 is in a connected state, the driving pump 21 is opened to keep the blocking valve 25 in an open state, ensuring that the blocking valve 25 is in a stable open state (due to leakage or other reasons, the pressure of the fluid sealed between the control valve 23 and the blocking valve 25 is reduced, and the opening of the blocking valve 25 is reduced or closed).

[0132] By intermittently running the driving pump 21, the opening effect of the blocking valve 25 is ensured, the running time of the driving pump 21 is effectively reduced, the failure rate of the driving pump 21 is reduced, the service life of the driving pump 21 is prolonged, the maintenance cost of the cooking utensil 100 is reduced, and the user's experience is improved.

[0133] It should be noted that in the embodiments of the present application, the second preset time length is 5-10 min, which further ensures that the blocking valve 25 is in a stable open state. In other embodiments of the present application, the second preset time length can be set according to the specific application scenario, which will not be described here in detail.

[0134] S6: According to the fact that the cooking cavity 131 is in a state of completing heat dissipation, the state of the control valve 23 is switched to connect the pipeline 22 between the driving pump 21 and the blocking valve 25, and the driving pump 21 is opened to drive the blocking valve 25 to switch to a closed state.

[0135] Specifically, during the process of air exchange heat dissipation of the cooking cavity 131, the timing module of the cooking appliance 100 counts the current heat dissipation time and feeds back to the controller of the cooking appliance 100, and at the same time, the temperature acquisition module (temperature sensor or thermocouple, etc.) of the cooking appliance 100 acquires the current temperature in the cooking cavity 131 and feeds back to the controller, the controller receives the current heat dissipation time and the current temperature, and the controller compares the current heat dissipation time with the preset heat dissipation time, and also compares the current temperature with the preset temperature. If the current heat dissipation time reaches the preset heat dissipation time, or the heat dissipation time is less than the preset heat dissipation time and the current temperature is lower than the preset temperature, the controller determines that the heat dissipation process is completed, the controller sends a state switching instruction to the control valve 23, the control valve 23 switches to a state in which the pipeline 22 between the driving pump 21 and the blocking valve 25 is connected, so that the driving pump 21 and the blocking valve 25 are connected, and the controller sends a reverse starting instruction to the driving pump 21, the driving pump 21 receives the reverse starting instruction, switches the blocking valve 25 to a closed state, so that the connecting channel 113 is closed, and the controller also sends a closing instruction to the fan 24, the fan 24 stops running after receiving the closing instruction, and finally the control valve 23 switches to a reset state, thereby completing the entire heat dissipation phase of the cooking cavity.

[0136] It should be noted that in the embodiments of the present application, the total time length of the heat dissipation process is less than 30 min, which can be 25 min, 20 min or 15 min, and the total time length of the heat dissipation process is greater than the preset heat dissipation time, and the difference between the two is greater than or equal to 1 min.

[0137] According to the control method of the cooking appliance 100 of the present application, the pipeline 22 is disconnected by the control valve 23, which realizes the maintenance of the blocking valve 25 in an open state, without the need for the driving pump 21 to run continuously, shortens the running time of the driving pump 21 in the air exchange process, prolongs the service life of the driving pump 21, reduces the failure rate of the driving pump 21, and reduces the use cost of the user, thereby improving the user experience.

[0138] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any changes or replacements within the technical scope disclosed by the present application, which can be easily thought by those skilled in the art, should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A passage control device for a cooking appliance, characterized by, The channel control device comprises: a blocking valve for opening or closing a connecting channel communicating with a cooking cavity of the cooking appliance; a driving pump communicating with the blocking valve through a pipeline to drive the action of the blocking valve; a control valve provided on the pipeline to switch on or off the pipeline; when the channel control device is used for the cooking appliance, the blocking valve cooperates with a body of the cooking appliance to open or close the connecting channel of the cooking appliance, the driving pump communicates with the blocking valve through the pipeline, and the control valve is provided on the pipeline; when it is needed to control the cooking cavity by using the channel control device, the control valve is switched on, the driving pump drives fluid to drive the action of the blocking valve to open the connecting channel, after the blocking valve is opened for a certain time, the control valve is switched off, the driving pump is closed, and the blocking valve is kept in the open state by using the fluid in the pipeline between the control valve and the blocking valve; when the control of the cooking cavity is completed, the control valve is switched on again, and the driving pump is started again, so that the driving pump reversely drives the fluid to operate to close the connecting channel.

2. The passage control device according to claim 1, characterized by The blocking valve comprises: a valve seat provided with a cavity communicating with the pipeline; a valve rod movably provided at one end of the cavity; a valve core provided at the other end of the valve rod and used to open or close an inlet of the connecting channel.

3. The passage control device according to claim 2, characterized by The blocking valve further comprises elastic members respectively cooperating with the valve seat and the valve rod, and the elastic force of the elastic members is used to keep the valve core at a position closing the inlet.

4. The passage control device according to claim 3, characterized by The elastic members are springs provided in the cavity; and / or the driving pump is a gas pump; and / or the control valve is a solenoid valve; and / or the channel control device comprises an air blower communicating with an outlet of the connecting channel, and the air blower is arranged to extract air in the cooking cavity.

5. A cooking appliance characterized by, The cooking appliance comprises: a body provided with a cooking cavity and a connecting channel communicating with the cooking cavity; a controller provided on the body; the channel control device according to any one of claims 1 to 4, at least part of a body of the blocking valve of the channel control device is provided in the connecting channel, the air blower of the channel control device communicates with an outlet of the connecting channel, and the air blower, the driving pump of the channel control device, and the control valve of the channel control device are respectively electrically connected with the controller. 6.A control method of a cooking appliance for controlling the cooking appliance according to claim 5, characterized in that, The control method of the cooking appliance comprises the following steps: starting the air blower according to the received cooking cavity control instruction; switching the state of the control valve to switch on the pipeline between the driving pump and the blocking valve; opening the driving pump to drive the blocking valve to switch to the open state; acquiring the opening duration of the blocking valve; switching the state of the control valve to switch off the pipeline between the driving pump and the blocking valve and closing the driving pump according to the opening duration of the blocking valve reaching a first preset duration. Switch the state of the control valve to connect the pipeline between the driving pump and the block valve according to the cooking cavity being in a control completion state, and open the driving pump to drive the block valve to switch to a closed state. 7.The control method of a cooking appliance according to claim 6, characterized in that, In the step of switching the state of the control valve to disconnect the pipeline between the driving pump and the block valve according to the opening duration of the block valve reaching a first preset duration, and the step of switching the state of the control valve to connect the pipeline between the driving pump and the block valve according to the cooking cavity being in a heat dissipation completion state, and opening the driving pump to drive the block valve to switch to a closed state, further comprising: According to the preset frequency, the pipeline is connected or disconnected, and the time interval of the preset frequency is a second preset duration; According to the pipeline between the driving pump and the block valve being in a connected state, the driving pump is opened to keep the block valve in an open state. 8.The control method of a cooking appliance according to claim 6, characterized in that, In the step of starting the fan according to the received cooking cavity control instruction, the control instruction of the cooking cavity is a cooking cavity heat dissipation instruction, and in the step of switching the state of the control valve to connect the pipeline between the driving pump and the block valve, comprising: Control the fan to run at a low speed; According to the fan running duration being greater than or equal to a duration threshold, switch the state of the control valve to connect the pipeline between the driving pump and the block valve. 9.The control method of a cooking appliance according to claim 8, characterized in that, After the step of opening the driving pump to drive the block valve to switch to an open state, further comprising: adjusting the fan to run at a high speed. 10.The control method of a cooking appliance according to claim 8, characterized in that, In the step of switching the state of the control valve to connect the pipeline between the driving pump and the block valve according to the cooking cavity being in a control completion state, and opening the driving pump to drive the block valve to switch to a closed state, the cooking cavity being in a control completion state is the cooking cavity being in a heat dissipation completion state, comprising: Obtain the current heat dissipation duration; Obtain the current temperature of the cooking cavity; Compare the current heat dissipation duration with a preset heat dissipation duration, and compare the current temperature with a preset temperature; According to the current heat dissipation duration being equal to the preset heat dissipation duration, or the current heat dissipation duration being less than the preset heat dissipation duration and the current temperature being lower than the preset temperature, judge that the cooking cavity is in a heat dissipation completion state; Switch the state of the control valve to connect the pipeline between the driving pump and the block valve; Open the driving pump to drive the block valve to switch to a closed state; Close the driving pump and the fan, and switch the control valve to a reset state.

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