CN212912784U

CN212912784U - Food processing machine convenient to clean

Info

Publication number: CN212912784U
Application number: CN202020487673.5U
Authority: CN
Inventors: 王旭宁; 王科
Original assignee: Joyoung Co Ltd
Current assignee: Shandong Jiuchuang Home Appliance Co ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2021-04-09
Anticipated expiration: 2030-04-07

Abstract

The utility model discloses a make things convenient for abluent food preparation machine, close the upper cover subassembly on the pot body including the base that has the electric heating module, the pot body, the lid of setting on the base, the upper cover subassembly includes the lid and sets up in the elastic sealing circle at lid edge, be equipped with the bleeder vent on the lid, bleeder vent department is equipped with mobilizable relief valve for the relief valve can switch between first exhaust position and second exhaust position, the relief valve includes exhaust passage and pressure release passageway, the exhaust passage intercommunication inside and outside the pot body, the pressure release passageway seals and switches on the internal and external portion of pot when second exhaust position at first exhaust position. The utility model discloses both convenient washing after the use of cooking can improve temperature rise speed and heating efficiency again to avoid the outside comdenstion water of blowout high temperature in fit clearance department of the upper cover and the pot body effectively.

Description

Food processing machine convenient to clean

Technical Field

The utility model belongs to the technical field of domestic cooking appliance, especially, relate to a convenient abluent food preparation machine.

Background

With the improvement of living standard, various household electrical cooking appliances, such as electric ovens, electric chafing dishes, frying and baking machines, are emerging continuously. The electric chafing dish usually comprises a base, a dish body arranged on the base and an upper cover covering the arc-shaped upper projection of the dish body, wherein an electric heating module is arranged in the base, and is plugged with a temperature control power plug, and the upper cover comprises a transparent cover body and a handle arranged at the center of the cover body. In order to avoid damage to the edge of the cover due to collision, a stainless steel reinforcing ring is usually wrapped on the edge of the cover. Further, the lid body may be provided with a vent hole for discharging steam.

When in use, the temperature control power plug is inserted at the side part of the base and is connected with the power supply, thus heating the pot body. The heating temperature can be conveniently set by rotating the adjusting knob of the temperature control power plug. When the water in the pot body is boiled, the water vapor can be discharged outwards through the vent holes on the cover body.

However, the existing electric chafing dish still has the following defects: firstly, a certain fit clearance is always formed between the reinforcing ring at the edge of the cover body and the pot body, so that when the electric chafing dish starts to heat, hot air can be discharged from the fit clearance to the outside, and the temperature rise speed and the heating efficiency are influenced. Secondly, the condensed water can permeate between the stainless steel reinforcing ring and the edge of the cover body, particularly, the soup in the pot body contains a small amount of oil and other components, so the condensed water permeating between the stainless steel reinforcing ring and the edge of the cover body is not pure clear water, the condensed water in the reinforcing ring is shielded by the reinforcing ring and cannot be cleaned, after the pot is used for a certain time, the edge of the cover body can form dirt which cannot be cleaned, and the sanitation and the appearance are influenced. In addition, the steam formed after the soup in the pot body is boiled rises to the inner side of the upper cover and the condensed water formed by condensation flows downwards to the edge of the upper cover along the inner side of the upper cover and fills the matching gap. Because the size of the vent hole on the cover body is fixed and unchangeable, when the temperature of the pot body is higher and the soup is boiled violently, a large amount of steam and hot air can not be discharged outwards through the vent hole in time, so that the condensed water at the matching gap between the upper cover and the pot body can be sprayed outwards, and the condensed water at the matching gap can be sprayed outwards, so that the tabletop can be polluted by the sprayed condensed water, and even the user can be splashed to scald the body.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a convenient abluent food preparation machine, both convenient washing after the use of cooking can improve temperature rise speed and heating efficiency again to avoid the outside comdenstion water of blowout high temperature in fit clearance department of the upper cover and the pot body effectively.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a convenient abluent food preparation machine, includes the base that has the electric heating module, sets up the pot body on the base, the upper cover subassembly that the lid closed on the pot body, the upper cover subassembly includes the lid and sets up in the elastic sealing circle at lid edge, be equipped with the bleeder vent on the lid, be equipped with mobilizable relief valve in the bleeder vent for the relief valve can switch between first exhaust position and second exhaust position, the relief valve includes exhaust passage and pressure release passageway, the exhaust passage intercommunication inside and outside the pot body, the pressure release passageway seals and switches on pot body inside and outside when second exhaust position in first exhaust position.

At first, the utility model discloses set up the elastic sealing circle at the edge of lid, like this, when playing a buffer protection to the lid edge, still make things convenient for the sealing washer from the lid dismouting, and then can demolish the sealing washer after uses such as cooking to the convenient effective washing to the lid avoids the lid edge to remain the spot. In addition, the elastic sealing ring can effectively improve the sealing effect between the cover body and the pot body, thereby improving the temperature rise speed and the heating efficiency of food processing machines such as electric chafing dishes and being beneficial to preventing hot air from spraying out condensed water from a gap between the cover body and the pot body to drive the condensed water to splash outwards and scald a user.

Especially, the utility model discloses be equipped with mobilizable relief valve in the bleeder vent of lid to the relief valve includes an exhaust passage and a pressure release passageway, and the relief valve still can switch between first exhaust position and second exhaust position. Like this, food preparation machine is just beginning to heat, perhaps when the firepower is less, and the hot-air in the pot body is less, and the relief valve at this moment is in initial first exhaust position, and correspondingly, the exhaust passage of the relief valve that has less cross section switches on, and the pressure release passageway is then in encapsulated situation to can avoid the internal thermal massive emission of pot, be favorable to promoting temperature rise speed and heat preservation effect. When the soup in the pot body begins to boil and produces a large amount of steam, the atmospheric pressure in the pot body rises gradually and exceeds the set value, at this moment, hot air pushes the relief valve to move to the second exhaust position, correspondingly, the pressure release channel of the relief valve with a larger cross section is conducted, that is, the exhaust channel and the pressure release channel are conducted simultaneously at this moment, thereby the hot air in the pot body can be rapidly diffused, the atmospheric pressure in the pot body is ensured to be maintained at the set value level, and then the hot air that can effectively avoid causing because of the hot air with pressure jack-up lid drives the gap blowout and outwards spill and scald the user between the sealing washer of lid and the pot body of comdenstion water.

Preferably, the center of the pressure release valve is provided with an axial exhaust passage, the side wall of the pressure release valve is provided with a pressure release through hole communicated with the exhaust passage, and the pressure release passage is communicated with the outside when the pressure release valve is located at the second exhaust position.

Because the exhaust passage is axially arranged at the center of the pressure release valve, the inner side and the outer side of the cover body can be always communicated, and the long communication of the exhaust passage is realized. The pressure relief through hole is arranged on the side wall of the pressure relief valve and communicated with the exhaust channel. When the pressure relief valve moves outward to the second exhaust position, the pressure relief passage communicates with the outside, thereby significantly increasing the air outlet. When the pressure release valve is located at the initial first exhaust position, the pressure release through hole arranged on the side wall of the pressure release valve can be blocked by the side wall of the air hole of the cover body to be in a closed state.

Preferably, the outer circumferential surface of the pressure relief valve is provided with limiting convex rings positioned on the inner side and the outer side of the cover body, and the pressure relief through hole is positioned between the limiting convex rings on the two sides.

The pressure release valve is provided with the limiting convex rings on the circumferential surfaces of the inner side and the outer side of the cover body respectively, so that the pressure release valve can be limited in axial movement. When the food processor is just started to heat, the air pressure in the pot body is lower than a set value, the pressure release valve moves downwards to a first exhaust position along the air holes under the action of self gravity, the limiting convex ring on the outer side of the pressure release valve is attached to the outer side surface of the cover body for limiting, hot air in the pot body can be exhausted outwards only through the exhaust passage in the center of the pressure release valve, and the outer end of the pressure release passage on the circumferential surface between the inner limiting convex ring and the outer limiting convex ring on the pressure release valve is blocked by the limiting convex ring on the outer side to be in a stop. When the pot body boils to generate a large amount of steam, the air pressure in the pot body rises to a set value, the pressure release valve moves upwards to a second exhaust position along the air holes under the action of the air pressure in the pot body, the limiting convex ring on the inner side of the pressure release valve is attached to the inner side surface of the cover body for limiting, and the pressure release channel at the outer end of the pressure release valve is in an open state at the moment. The hot air in the boiler body is firstly discharged outwards through the exhaust passage in the middle of the pressure release valve. When the hot air outwards passes through the cover body, the hot air can be quickly discharged outwards from the pressure relief channel on the circumferential surface of the outer end of the pressure relief valve, so that the requirement of discharging a large amount of steam can be met, the flow rate of the hot air passing through the pressure relief valve can be reduced, and the situation that the soup is carried by the quickly discharged airflow and is outwards splashed is avoided. In addition, the exhaust channel and the pressure relief channel are favorable for avoiding blockage of food particles which are fine when a large amount of steam is exhausted.

Preferably, the distance between the inner limiting convex ring and the outer limiting convex ring is a, the thickness of the cover body is b, and a/b is more than or equal to 2.2 and less than or equal to 3.

The ratio of the distance a between the inner limiting convex ring and the outer limiting convex ring to the thickness b of the cover body can be reasonably controlled, so that the pressure release valve has a reasonable axial movement distance. On one hand, the pressure relief valve can be driven to move to a second exhaust position when the gas pressure in the pot body is greater than or equal to a set value; on the other hand, the pressure relief channel section area of the pressure relief valve exposed outside the cover body and the exhaust channel section area have a proper ratio, so that the quick discharge of a large amount of steam can be ensured, the quick fall-back of the pressure relief valve when the steam is discharged and the pressure in the pot body is slightly reduced can be avoided, and the pressure relief valve can be stably maintained at the second exhaust position.

Preferably, the exhaust passage comprises a main passage extending axially outwardly from an inner end of the pressure relief valve, a pressure increasing constriction provided at an outer end of the main passage and tapering so as to form a step between the main passage and the pressure increasing constriction.

Because the exhaust passage is provided with the reduced pressurizing necking at the outer end of the main passage, the cross section of the outlet of the exhaust passage can be reduced as much as possible when the exhaust passage is positioned at the first exhaust position, and the heat energy loss caused by excessive heat leakage is avoided. On the other hand, when the pressure release valve is in the second exhaust position, because the exhaust passage and the pressure release passage of the pressure release valve participate in exhaust together at the moment, and the pressure release passage can be far larger than the pressurization necking at the moment, the exhaust capacity of the whole pressure release valve can be remarkably increased, and the gas pressure in the boiler body is maintained in a reasonable range.

Preferably, the inner side of the sealing ring is provided with a U-shaped clamping groove, the edge of the cover body is embedded in the U-shaped clamping groove, and the outer edge of the sealing ring is provided with a sealing convex ring extending downwards.

Because the edge of the cover body is embedded in the U-shaped clamping groove on the inner side of the sealing ring, namely, the sealing ring can be sleeved on the edge of the cover body by only properly expanding the elastic sealing ring, and the sealing ring can be effectively prevented from automatically falling off from the cover body while the sealing ring is conveniently disassembled and assembled by reasonably controlling the elasticity of the sealing ring material and the ratio between the diameters of the sealing ring and the cover body. In particular, the sealing convex ring arranged on the outer edge of the sealing ring and extending downwards is beneficial to forming sealing fit with the opening of the pot body.

Preferably, a radially extending supporting flange is arranged at the opening of the pot body, an upward outer positioning ring edge is arranged on the outer edge of the supporting flange, and the sealing ring is limited in the outer positioning ring edge.

The radially extending support flange forms an annular surface which engages the sealing ring, thereby facilitating an improved sealing effect of the sealing ring. The outer positioning ring edge not only plays a role in positioning the center of the cover body with the sealing ring, but also can prevent condensed water deposited at the supporting flange from flowing outwards and ensure that the condensed water flows back into the pot body.

Preferably, an inner positioning ring edge lower than the outer positioning ring edge is arranged on the inner side of the supporting flange, and the sealing convex ring is positioned between the inner positioning ring edge and the outer positioning ring edge.

The inner positioning ring edge, the outer positioning ring edge and the supporting flange form an annular groove with a U-shaped cross section, so that the sealing convex ring on the sealing ring can be accurately positioned in the annular groove, and the sealing effect can be improved. Because the inner positioning ring edge is lower than the outer positioning ring edge, condensed water deposited in the annular groove can flow back into the boiler body over the inner positioning ring edge.

Preferably, a return opening is provided on the inner positioning collar, the bottom edge of said return opening being flush with the support flange.

The condensed water accumulated between the inner and outer positioning ring edges can flow back to the pot body in time through the backflow notch, and the bottom edge of the backflow notch is flush with the supporting flange, so that the condensed water can be effectively prevented from remaining in the supporting flange.

Preferably, the radius of the cover body is R, the distance between the air holes and the center of the cover body is R, and R is greater than or equal to 1/4 and less than or equal to 3/4.

We can avoid on the one hand that air vent and relief valve are too close to the handle that sets up at upper cover central point to the ratio of distance R and the lid radius R at lid center is controlled to the bleeder vent rationally, and then can prevent effectively that the user from being scalded from relief valve spun steam when handheld handle, and on the other hand can avoid the relief valve too close to the lid edge again, and then prevent to form greasy spot from the direct condensation on the desktop of relief valve spun steam.

Therefore, the utility model discloses following beneficial effect has: the electric chafing dish is convenient to clean after being used, the temperature rise speed and the heating efficiency can be improved, and high-temperature condensed water is effectively prevented from being sprayed outwards from a fit clearance between the upper cover and the dish body.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partial structural view of the upper cover assembly.

FIG. 3 is a schematic view of the connection structure of the upper cover assembly and the pot body when the pressure relief valve is in the second venting position.

In the figure: 1. the pressure-relief type electric cooker comprises a base 11, a power supply connector 2, a cooker body 21, a supporting flange 22, an outer positioning ring edge 23, an inner positioning ring edge 24, an annular positioning groove 25, a backflow notch 3, an upper cover assembly 31, a cover body 311, an air vent 32, a handle 33, a sealing ring 331, a U-shaped clamping groove 332, a sealing convex ring 34, a pressure-relief valve 341, a limiting convex ring 342, an exhaust channel 343, a pressure-relief channel 344, a main channel 345, a pressure-boosting necking 346 and a pressure-relief through hole.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

As shown in fig. 1, a food processor convenient for cleaning, in particular to an electric chafing dish in the embodiment, the food processor comprises a base 1, a pot body 2 arranged on the base, and an upper cover assembly 3 covering the pot body, wherein an electric heating module is arranged in the base to heat the pot body, and a power connector 11 with a temperature control knob is arranged on one side of the base. When in use, the power plug of the power connector end is connected to the power supply socket. Then the temperature control knob is rotated to control the heating temperature of the electric heating module, so that the electric heating module can be electrified to work, and soup or food in the pot body can be heated.

In addition, as shown in fig. 1 and 2, the upper cover assembly includes a cover 31 made of glass, a handle 32 is disposed at the center of the cover, an elastic sealing ring 33 made of silica gel is coated on the edge of the cover, and the sealing ring can play a role in buffering and protecting the edge of the cover, thereby preventing the edge of the cover from being damaged due to collision. The elastic sealing ring can effectively improve the sealing effect between the upper cover component and the pot body, so that the temperature rise speed and the heating efficiency of the electric chafing dish can be improved, a gap is prevented from being generated between the upper cover component and the pot body, and hot air in the pot body can be prevented from driving condensed water to be outwards splashed out to scald a user when being outwards sprayed out from the gap.

It can be understood that the sealing ring and the cover body can form interference fit, so that the sealing ring is reliably sleeved on the cover body, and meanwhile, the sealing ring is conveniently detached from the cover body after being used and cleaned, so that the sealing ring, particularly the cover body, can be effectively cleaned conveniently, and the residual stain on the edge of the cover body is avoided.

In addition, the cover body is provided with air holes 311 so as to discharge a large amount of steam generated when the soup in the pot body is boiled. It can be understood that the amount of steam or hot air in the pot body can be greatly different when the electric chafing dish is in different heating stages and heating states. Therefore, a pressure release valve 34 capable of moving axially along the air vent is arranged in the air vent, the pressure release valve has a first exhaust position and a second exhaust position, an exhaust channel 342 axially penetrating through the inner end and the outer end is arranged in the center of the pressure release valve, and a pressure release channel 343 communicated with the exhaust channel is arranged on the side wall of the pressure release valve. When the pressure relief valve is at the first exhaust position, the pressure relief channel is closed; when the pressure relief valve is in the second exhaust position, the pressure relief channel enables the inside and the outside of the pot body to be communicated. Of course, the effective cross-section of the exhaust channel is smaller than the effective cross-section of the pressure relief channel.

When the electric chafing dish is just heated for use or the temperature set by the temperature control element is lower, soup in the pot body is not boiled or is in a slightly opened state, the steam or hot air generation amount in the pot body is less, the air pressure in the pot body is lower than a set value, the pressure release valve is positioned at a first exhaust position, the exhaust passage of the pressure release valve conducts the inside and the outside of the pot body, and the effective cross section of the exhaust passage is smaller, so that the heat in the pot body can be prevented from being greatly dissipated, and the temperature rise speed and the heat preservation effect are favorably improved; when the soup in the pot body is completely boiled, a large amount of steam and hot air are generated in the pot body, the air pressure in the pot body is larger than or equal to a set value at the moment, the air pressure drives the pressure release valve to outwards move from the first exhaust position to the second exhaust position in the initial state, the pressure release channel of the pressure release valve enables the inside and the outside of the pot body to be communicated at the moment, thereby the steam or the hot air in the pot body can be rapidly diffused, the air pressure in the pot body is ensured to be maintained at the set value level, and further the upper cover can be effectively prevented from being slightly jacked up due to the fact that the hot air with pressure cannot be timely outwards discharged, and the hot air is prevented from driving condensed water to be sprayed out from a gap between the sealing ring of.

As a preferable scheme, the pressure release valve is substantially cylindrical, and the circumferential surfaces at both ends of the pressure release valve are respectively provided with the limit convex rings 341, one of which is located on the inner side of the cover body, and the other of which is located on the outer side of the cover body, so that the pressure release valve can be limited by axial movement. Further, a main passage 344, which axially penetrates both the inner and outer ends and constitutes an exhaust passage, is provided at the center of the relief valve. 3-4 pressure relief through holes 346 penetrating through the exhaust channel are formed in the circumferential surface of the pressure relief valve between the inner limiting convex ring and the outer limiting convex ring, the pressure relief through holes axially extend to the inner limiting convex ring and the outer limiting convex ring, and the pressure relief through holes form the pressure relief channel.

When the electric chafing dish just begins to heat, the internal atmospheric pressure of pot is less than the setting value, and the relief valve at this moment moves down along the bleeder vent and stops in first exhaust position under the effect of self gravity, and the spacing bulge loop in the relief valve outside pastes and leans on the lid lateral surface and spacing, and the internal hot-air of pot can only outwards be discharged through the less exhaust passage in aperture at relief valve center, and the outer end of the pressure release passageway that lies in between the inside and outside spacing bulge loop on the relief valve receives the shutoff of the spacing bulge loop in the outside and is in the encapsulated situation. At this time, the inner end of the exhaust channel positioned on the inner side of the upper cover is an air inlet end, and the outer end of the exhaust channel positioned on the outer side of the upper cover is an air outlet end. When the soup in the fire pot boils to generate a large amount of steam, the air pressure in the pot body rises to a set value, the pressure release valve moves upwards to a second exhaust position along the air holes under the action of the difference of the pressure of the air inside and outside the pot body, the limiting convex ring on the inner side of the pressure release valve is attached to the inner side surface of the cover body to limit, and the steam and the hot air in the pot body are discharged outwards through the exhaust channel in the middle of the pressure release valve. After the steam and the hot air outwards pass through the cover body, the steam and the hot air can be simultaneously and radially and quickly discharged outwards from the exhaust passage in the middle and the pressure relief passage on the circumferential surface of the pressure relief valve, so that the requirement of discharging a large amount of steam can be met, the flow rate of the hot air when passing through the pressure relief valve can be reduced, and the situation that the soup is carried by the quick discharged airflow and is outwards splashed is avoided. At this time, the inner end of the exhaust passage in the middle of the pressure relief valve, namely the air inlet end of the exhaust passage, becomes the air inlet end of the pressure relief passage at the same time. That is, the pressure relief channel and the air inlet end of the exhaust channel are the same, and the air outlet end of the pressure relief channel is far larger than the air outlet end of the exhaust channel.

It is known that the resistance of a fluid passing through a pipe is related to, on the one hand, the pipe diameter and, on the other hand, the length of the pipe, the resistance being smaller the larger the pipe diameter and greater the length. Although the air inlet end of the pressure relief channel of the pressure relief valve is the same as the air inlet end of the exhaust channel, the air outlet end of the pressure relief channel is far larger than the air outlet end of the exhaust channel, and the proportion of the air inlet end in the length of the whole pressure relief channel and the whole exhaust channel is smaller. Therefore, the resistance of the steam and the hot air when being discharged outside through the pressure discharge passage is much smaller than that when being discharged outside through the exhaust passage. Accordingly, when the pressure relief valve is located at the second exhaust position, the outward flowing speed of the steam and the hot air in the pot body can be remarkably increased, so that a large amount of steam and hot air can be exhausted outwards, and the air pressure in the pot body can be kept stable.

Further, the ratio of the distance a between the inner limiting convex ring and the outer limiting convex ring to the thickness b of the cover body can be controlled to be in the following range: a/b is more than or equal to 2.2 and less than or equal to 3, so that the pressure release valve has reasonable axial movement distance, and a pressure release channel of the pressure release valve, which is exposed out of the cover body, has enough sectional area, so that a large amount of steam can be discharged quickly, and the rapid reduction of the air pressure in the pot body, which is caused by the excessively quick discharge of the steam and hot air when the pressure release valve moves from the first exhaust position to the second exhaust position, can be avoided, so that the air pressure in the pot body is kept stable as much as possible, and the pressure release valve can be stably maintained at the second exhaust position when the soup enters the boiling state.

In order to reduce exhaust passage's air output as far as possible to promote the temperature rise speed when the electric chafing dish begins to heat, and guarantee pressure release channel's air displacement, in order to do benefit to a large amount of steam and hot-air's effective discharge, the utility model discloses an exhaust passage is still including setting up the pressure boost throat 345 that reduces in the main entrance outer end, thereby forms the step between main entrance and pressure boost throat. The cross section of the air outlet end of the exhaust channel when the exhaust channel is located at the first exhaust position can be reduced through the pressurization necking, so that the heat energy loss caused by excessive heat leakage is avoided. The size of the pressure relief channel can be increased as much as possible, so that the sectional area of the air outlet end of the pressure relief channel is far larger than that of the air outlet end of the exhaust channel. When the pressure relief valve is in the second exhaust position, steam and hot air can be exhausted mainly through the pressure relief passage, so that the exhaust capacity of the whole pressure relief valve can be remarkably increased, and the gas pressure in the boiler body can be maintained within a reasonable range.

As another preferred scheme, a U-shaped slot 331 with a U-shaped cross section is disposed on the inner side of the sealing ring, and the edge of the cover body is embedded in the U-shaped slot with interference. That is to say, we can connect the sealing ring to the edge of the cover body by only properly expanding the elastic sealing ring, and can effectively avoid the sealing ring to fall off from the cover body when the sealing ring is conveniently dismounted and mounted by reasonably controlling the elasticity of the sealing ring material and the diameter ratio of the sealing ring to the diameter of the cover body.

In addition, the outer edge of the sealing ring is provided with a sealing convex ring 332 which integrally extends downwards, so that the contact area between the sealing ring and the opening of the pot body can be reduced as much as possible, and the sealing fit between the sealing ring and the opening of the pot body can be promoted.

Furthermore, as shown in fig. 3, a radially outwardly extending support flap 21 may be disposed at the opening of the pot body to ensure effective sealing contact between the sealing ring and the opening of the pot body, which is beneficial to improving the sealing effect of the sealing ring. In addition, an upward outer positioning ring edge 22 is arranged on the outer edge of the supporting flange, so that the sealing ring of the upper cover is limited in the outer positioning ring edge, and the upper cover can be accurately positioned at the opening of the pot body. Meanwhile, the outer positioning ring edge can also prevent condensed water deposited at the supporting flanging from flowing outwards, and the condensed water is ensured to flow back into the pot body.

Furthermore, an inner, upwardly directed retaining collar 23 is provided on the inside of the support flange, so that an annular positioning groove 24 is formed between the inner and outer retaining collars, in which the sealing bead of the sealing ring is positioned, in order to ensure correct positioning of the lid. It can be understood that the sealing convex ring and the annular positioning groove can form a sealing fit, so that three-surface matched sealing is formed between the sealing convex ring and the inner side surface, the outer side surface and the bottom surface of the annular positioning groove, and the sealing effect can be obviously improved. Of course, the inner positioning ring edge should be lower than the outer positioning ring edge so that the condensed water deposited in the annular positioning groove can flow back into the boiler body through the inner positioning ring edge.

Also, the inner positioning rim may be provided with a plurality of return notches 25 extending downwardly to the support flange, with the bottom edges of the return notches being flush with the support flange. Therefore, condensed water accumulated between the inner positioning ring edge and the outer positioning ring edge can flow back to the pot body in time through the backflow notch, and the condensed water is prevented from remaining in the annular positioning groove.

As described above, when the pressure release valve is in the second exhaust position, the steam and the hot air are substantially laterally ejected from the pressure release passage of the pressure release valve, and therefore, the ratio of the distance R from the vent hole to the center of the cover body to the radius R of the cover body can be controlled in the following range: 1/4 is not less than R/R is not less than 3/4, on one hand, the vent hole and the pressure release valve are prevented from being too close to the handle arranged at the center of the upper cover, and then the handle can be effectively prevented from being scalded by steam sprayed from the pressure release valve when being held by a user, on the other hand, the pressure release valve can be prevented from being too close to the edge of the cover body, and then the steam sprayed from the pressure release valve is prevented from being directly condensed on a desktop to form greasy stains.

It is understood that, in addition to the preferred embodiments described above, various changes and modifications can be made by those skilled in the art according to the present invention, and for example, it can be applied to a food processor such as an electric steamer, without departing from the spirit of the present invention, which is defined by the scope of the appended claims.

Claims

1. The utility model provides a convenient abluent food preparation machine, includes the base that has the electric heating module, sets up the pot body on the base, the upper cover subassembly that the lid closed on the pot body, characterized by, the upper cover subassembly includes the lid and sets up in the elastic sealing circle at lid edge, be equipped with the bleeder vent on the lid, bleeder vent department is equipped with mobilizable relief valve for the relief valve can switch over between first exhaust position and second exhaust position, the relief valve includes exhanst duct and pressure release passageway, the exhanst duct intercommunication inside and outside the pot body, the pressure release passageway seals and switches on the inside and outside of pot body when second exhaust position in first exhaust position.

2. The food processor as defined in claim 1, wherein the pressure relief valve has an axial exhaust passage at a center thereof, a pressure relief through hole communicating with the exhaust passage is formed in a sidewall of the pressure relief valve, and the pressure relief passage communicates with the outside when the pressure relief valve is at the second exhaust position.

3. The food processor as claimed in claim 2, wherein the pressure relief valve has a stopper on an outer circumferential surface thereof at both sides of the cover, and the pressure relief through hole is located between the stoppers at both sides.

4. The food processor as claimed in claim 3, wherein the distance between the inner and outer position-limiting members is a, the thickness of the cover body is b, and a/b is 2.2-3.

5. The easy-to-clean food processor as defined in claim 1, wherein said vent passage includes a main passage extending axially outwardly from an inner end of said pressure relief valve, and a pressure-increasing constriction connecting an outer end of said main passage and being reduced so as to form a step between said main passage and said pressure-increasing constriction.

6. The food processor as claimed in claim 1, wherein the sealing ring has a U-shaped groove on an inner side thereof, the edge of the cover is inserted into the U-shaped groove, and the outer edge of the sealing ring has a downwardly extending sealing protrusion ring.

7. The easy-to-clean food processor as claimed in claim 6, wherein the opening of the pot body is provided with a radially extending support flange, an upward outer positioning ring is provided on the outer edge of the support flange, and the sealing ring is limited in the outer positioning ring.

8. The food processor as defined in claim 7, wherein the support flange has an inner retaining rim formed on an inner side thereof which is lower than the outer retaining rim, and the sealing bead is positioned between the inner and outer retaining rims.

9. The easy-to-clean food processor as defined in claim 8, wherein the inner positioning rim has a return notch, the bottom edge of said return notch being flush with the support flange.

10. The easy-to-clean food processor as claimed in claim 1, wherein the radius of the lid body is R, the distance between the venting holes and the center of the lid body is R, and R/R is 1/4-3/4.