CN107019419B

CN107019419B - Electric pressure cooker

Info

Publication number: CN107019419B
Application number: CN201610273249.9A
Authority: CN
Inventors: 王洪元; 王正清; 林达福
Original assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Current assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Priority date: 2016-02-01
Filing date: 2016-04-27
Publication date: 2023-07-14
Anticipated expiration: 2036-04-27
Also published as: CN107019418A; CN205729067U; CN107019418B; CN205849251U; CN205849258U; CN206080138U; CN107019419A; CN205849263U; CN205849249U; CN205849259U; CN107019420A; CN107019423B; CN107019420B; CN205849250U; CN107019423A

Abstract

An electric pressure cooker comprising: the cooker body comprises an outer cooker and an inner cooker arranged in the outer cooker, wherein the inner cooker is used for containing cooked food; the pot cover is arranged on the pot body and can be sealed to the inner pot, and the pot cover is provided with an exhaust channel communicated with the interior of the inner pot and a pressure limiting valve for controlling the ventilation state of the exhaust channel; the driving mechanism comprises a power mechanism for providing rotary motion of the rotary shaft and a thread transmission mechanism for converting the rotation of the rotary shaft into up-and-down movement of the pressure limiting valve, and the thread transmission mechanism comprises a thread column and a thread hole which are matched with each other. The technical scheme of the invention solves the problems that the electric pressure cooker in the prior art cannot continuously exhaust air, food cannot continuously roll over, and the cooking effect is poor.

Description

Electric pressure cooker

Technical Field

The invention relates to an electric pressure cooker, in particular to an improvement of an exhaust structure of the electric pressure cooker.

Background

The electric pressure cooker is a common household appliance. Wherein, electric pressure cooker includes the blast pipe and movably sets up the steam valve in the blast pipe top. In the prior art, the steam valve is controlled by an electromagnetic valve, and the steam valve is opened by means of the pressure of steam. When the electromagnetic valve is closed, the high-pressure steam can fully jack the steam valve, and the phenomenon of pot overflow is particularly easy to occur at the moment, so that the electromagnetic valve in the prior art can only perform intermittent exhaust. The food can not roll continuously in the pot under the condition, and the cooking effect is poor.

Disclosure of Invention

The invention mainly aims to provide an electric pressure cooker, which solves the problems that the electric pressure cooker in the prior art cannot continuously exhaust air, food cannot continuously roll over and the cooking effect is poor.

In order to achieve the above object, the present invention provides an electric pressure cooker including: the cooker body comprises an outer cooker and an inner cooker arranged in the outer cooker, wherein the inner cooker is used for containing cooked food; the pot cover is arranged on the pot body and can be sealed to the inner pot, and the pot cover is provided with an exhaust channel communicated with the interior of the inner pot and a pressure limiting valve for controlling the ventilation state of the exhaust channel; the driving mechanism comprises a power mechanism for providing rotary motion of the rotary shaft and a thread transmission mechanism for converting the rotation of the rotary shaft into up-and-down movement of the pressure limiting valve, and the thread transmission mechanism comprises a thread column and a thread hole which are matched with each other.

By applying the technical scheme of the invention, the power mechanism provides driving force, and the transmission mechanism transmits the driving force to the pressure limiting valve and enables the pressure limiting valve to rotate. The threaded hole and the threaded column convert the rotation motion of the pressure limiting valve into linear motion so as to control the exhaust state of the exhaust channel. The structure can accurately control the position of the pressure limiting valve through the power mechanism, so that the pressure limiting valve does not completely open the exhaust channel, and the overflow of the pot is prevented. Meanwhile, the structure can ensure the control precision of the motion: the rotating shaft has a larger rotating angle, and the smaller linear movement distance of the pressure limiting valve is realized, so that the control precision is ensured. Therefore, the structure can realize continuous exhaust operation, thereby realizing continuous rolling of food and having better flavoring effect. Therefore, the technical scheme of the invention solves the problems that the electric pressure cooker in the prior art cannot continuously exhaust air, food cannot continuously roll over and the cooking effect is poor.

Further, a threaded column is formed on the pressure limiting valve, a threaded hole is formed on the pot cover, and the power mechanism drives the pressure limiting valve to rotate.

Further, the driving mechanism also comprises a transmission mechanism, wherein the transmission mechanism comprises a gear fixed on the rotating shaft and a tooth-shaped part fixed on the pressure limiting valve, and the gear and the tooth-shaped part are meshed with each other.

Further, the power mechanism is a stepping motor.

Further, the pressure limiting valve includes: the valve body, the tooth-shaped part is set up on sidewall of the valve body, there are screw thread structures distributed along circumference on the outer sidewall of the valve body and form the threaded column; the plug is arranged in the valve body and is positioned above the exhaust channel, an elastic resetting piece is arranged between the plug and the valve body, and when the exhaust channel exhausts, the motor drives the valve body to move along the vertical direction so as to control the compression amount of the elastic resetting piece, so that the pressures at the two ends of the plug are balanced.

Further, the pressure limiting valve further comprises a positioning ring, and the plug is connected to the inner side of the positioning ring through a connecting rod, wherein the positioning ring is arranged in the valve body in a penetrating mode, and the outer diameter of the positioning ring is matched with the inner diameter of the valve body, so that the plug can move up and down in the valve body along a straight line.

Further, the pot cover comprises a pot cover main body and an inner pot cover arranged on the pot cover main body, wherein an exhaust channel is formed on the inner pot cover, and the pressure limiting valve and the driving mechanism are both positioned above the inner pot cover.

Further, the electric pressure cooker further comprises a steam box arranged above the pressure limiting valve, the section of the steam box is circular, and a circular accommodating concave part for accommodating the steam box is arranged on the cooker cover main body.

Further, the diameter of the exhaust passage is in the range of 3.3-30 mm.

Further, the diameter of the exhaust passage is in the range of 4-10 mm.

Further, the length of the exhaust passage is in the range of 3-30 mm.

Further, the length of the exhaust passage is in the range of 5-15 mm.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

fig. 1 shows a schematic structural view of an embodiment of an electric pressure cooker according to the invention;

fig. 2 shows a schematic cross-sectional view of the electric pressure cooker of fig. 1;

FIG. 3 shows a schematic cross-sectional view of a cover of the electric pressure cooker of FIG. 1;

FIG. 4 shows an enlarged schematic view at A in FIG. 3;

fig. 5 shows a schematic structural view of a pressure limiting valve of the electric pressure cooker of fig. 1;

FIG. 6 shows a schematic cross-sectional view of the pressure limiting valve of FIG. 5;

fig. 7 shows a schematic structural view of a plug of the electric pressure cooker of fig. 1;

FIG. 8 shows a schematic cross-sectional view of the plug of FIG. 7;

FIG. 9 is a schematic view showing the construction of the powered pot cover of FIG. 1;

FIG. 10 is a schematic view showing the internal structure of the pot cover of FIG. 9; and

fig. 11 shows a schematic front view of the pot cover of fig. 10.

Wherein the above figures include the following reference numerals:

10. a pot body; 11. an outer pot; 12. an inner pot; 20. a pot cover; 21. a pot cover main body; 211. a receiving recess; 22. an inner pot cover; 30. an exhaust passage; 40. a power mechanism; 50. a pressure limiting valve; 51. a valve body; 52. a plug; 53. an elastic reset piece; 54. a positioning ring; 55. a connecting rod; 60. a screw thread transmission mechanism; 61. a threaded hole; 62. a threaded column; 70. a transmission mechanism; 71. a stepping motor; 72. a gear; 73. a tooth-shaped portion; 80. a steam box.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

As shown in fig. 1 to 4 and 11, the electric pressure cooker of the present embodiment includes a cooker body 10 and a cover 20. The pot body 10 comprises an outer pot 11 and an inner pot 12 arranged in the outer pot 11, wherein the inner pot 12 is used for containing food to be cooked. The cooker cover 20, the cooker cover 20 is set up on the cooker body 10, and can seal and close to the inner pot 12, there are exhaust passage 30 communicating with inside of the inner pot 12, and the pressure limiting valve 50 controlling the ventilation state of the exhaust passage 30 on the cooker cover 20. The electric pressure cooker further comprises a power mechanism 40, a transmission mechanism 70 and a threaded transmission mechanism 60, wherein the power mechanism 40 and the transmission mechanism 70 are arranged in the cooker cover 20, and the transmission mechanism 70 transmits the power of the power mechanism 40 to the pressure limiting valve 50 and enables the pressure limiting valve 50 to rotate. The screw transmission mechanism 60 includes a screw hole 61 provided in the lid 20 and a screw post 62 provided on the pressure limiting valve 50, the screw hole 61 and the screw post 62 being engaged, the screw hole 61 and the screw post 62 converting rotation of the pressure limiting valve 50 into linear motion, thereby changing the exhaust state of the exhaust passage 30.

With the technical solution of the present embodiment, the power mechanism 40 provides a driving force, and the transmission mechanism 70 transmits the driving force to the pressure limiting valve 50 and rotates the pressure limiting valve 50. The screw hole 61 and the screw post 62 convert the rotational movement of the pressure limiting valve 50 into a linear movement to control the exhaust state of the exhaust passage 30. The above structure can precisely control the position of the pressure limiting valve 50 through the power mechanism 40, thereby making the pressure limiting valve 50 incompletely open the exhaust passage 30, preventing the occurrence of the overflow condition. Therefore, the structure can realize continuous exhaust operation, thereby realizing continuous rolling of food and having better flavoring effect. Therefore, the technical scheme of the embodiment solves the problems that the electric pressure cooker in the prior art cannot continuously exhaust air, food cannot continuously roll over and the cooking effect is poor.

Preferably, in the technical solution of the present embodiment, the power mechanism 40 is a stepper motor. The rotation control range of the stepping motor can be accurate, and thus the pressure limiting valve 50 can be accurately controlled to be positioned above the exhaust passage 30. When the air is required to be exhausted, the stepping motor is operated to control the pressure limiting valve 50 to open the air exhaust passage 30, but the pressure limiting valve 50 does not completely open the air exhaust passage 30, so that the phenomenon of overflowing of the electric pressure cooker can not occur when the electric pressure cooker is exhausted. Therefore, the structure can realize continuous exhaust of the electric pressure cooker, and food continuously rolls in the exhaust process, so that the flavoring effect is better.

As shown in fig. 10 and 11, in the technical solution of the present embodiment, a gear 72 of the transmission mechanism 70 provided on a motor shaft of the stepping motor and a tooth-shaped portion 73 provided on the pressure limiting valve 50 are engaged with the gear 72 and the tooth-shaped portion 73. The gear 72 and the tooth-shaped portion 73 form a gear transmission mechanism, and the gear transmission mechanism has the advantages of stable transmission and accurate position control.

As shown in fig. 4 to 6, in the technical solution of the present embodiment, the pressure limiting valve 50 includes a valve body 51 and a plug 52. Wherein, screw post 62 and profile of tooth portion 73 all set up on the lateral wall of valve body 51, and end cap 52 sets up in valve body 51 and is located the top of exhaust passage 30, is provided with elasticity reset piece 53 between end cap 52 and the valve body 51. When the exhaust passage 30 is exhausted, the motor 71 drives the valve body 51 to move in the vertical direction to control the compression amount of the elastic restoring member 53, thereby balancing the pressures at both ends of the stopper 52. Specifically, the elastic restoring member 53 is a spring that applies pressure toward the plug 52 so that the plug 52 blocks the exhaust passage downward. By controlling the stepper motor, the position of the valve body 51 is controlled. It is thus possible to give the spring an initial compression amount, i.e., an initial pressure, by setting the initial position of the valve body 51. The method of adjusting the pressure of the pressure limiting valve 50 in the present embodiment will be described below:

taking the initial pressure of the spring as 100KPa as an example, when the pressure of the inner pot 12 of the electric pressure cooker is smaller than 100KPa, the spring pressure above the choke plug 52 is larger, and at the moment, the choke plug 52 is tightly propped against the upper part of the exhaust channel 30, so that the electric pressure cooker does not exhaust. When the pressure in the inner pot 12 rises and exceeds 100KPa after cooking for a certain period of time, the pressure at the lower end of the plug 52 is larger, and the plug 52 is pushed open to realize exhaust. When the pressure in the inner pot 12 gradually decreases after the exhaust is performed for a certain period of time, for example, when the pressure in the inner pot 12 decreases to 99KPa, the elastic force of the spring is larger, the plug 52 tends to move downward, and at this time, the stepper motor works to raise the position of the valve body and reduce the elastic force of the spring, for example, the elastic force of the spring decreases to 98KPa. At this time, the pressure at the lower end of the plug 52 is large, and the plug 52 continues to maintain the state of opening the exhaust passage 30. As the exhaust process of the electric pressure cooker is continuously performed, the stepper motor continuously adjusts the position of the valve body 51 upward, thereby realizing the whole continuous exhaust process.

It should be noted that, the monitoring and adjustment of the pressure can be implemented by a pressure sensor in the prior art, which is not described herein.

As shown in fig. 7 and 8, in the technical solution of the present embodiment, the pressure limiting valve 50 further includes a positioning ring 54, and the plug 52 is connected to the inner side of the positioning ring 54 through a connecting rod 55. Wherein, the locating ring 54 is penetrated in the valve body 51, and the outer diameter of the locating ring 54 is matched with the inner diameter of the valve body 51, so that the plug 52 can move up and down along a straight line in the valve body 51. The above structure can make the movement of the plug 52 in the valve body 51 more stable.

As shown in fig. 5 and 6, in the technical solution of the present embodiment, an elastic sleeve is further connected to the lower end of the valve body 51, and the lower end of the elastic sleeve is sealed at the circumferential outer side of the exhaust channel 30, so as to prevent steam in the valve body 51 from leaking into the pot cover 20. Meanwhile, the upper end of the elastic sleeve is provided with a necking connecting section, the necking connecting section is arranged in the valve body 51 in a penetrating mode from bottom to top, and meanwhile, the necking connecting section and the valve body 51 are fixed together through a bump and a groove. During movement of the plug 52, the neck down connection section has a raised position that mates with the retaining ring 54. When the continuous exhaust process of the electric pressure cooker is finished, the pressure in the inner cooker 12 is reduced to 0, the stepping motor works, the valve body 51 is lifted upwards, and the valve body 51 drives the elastic sleeve to lift. When the elastic sleeve is lifted to a certain position, the upper surface of the necking connection section is abutted against the lower surface of the positioning ring 54, so that the plug 52 is driven to move upwards, and the exhaust channel 30 is completely opened.

As shown in fig. 3 and 4, in the technical solution of the present embodiment, the pot cover 20 includes a pot cover main body 21 and an inner pot cover 22 disposed on the pot cover main body 21, wherein the exhaust passage 30 is formed on the inner pot cover 22, and the pressure limiting valve 50 and the transmission mechanism 70 are both located above the inner pot cover 22. Specifically, the exhaust passage 30 is a through hole formed at the upper surface of the inner lid 22, and the above-described structure makes the molding of the exhaust passage 30 easier.

As shown in fig. 5 and 9, in the technical solution of the present embodiment, the electric pressure cooker further includes a steam box 80 disposed above the pressure limiting valve 50, the steam box 80 has a circular cross section, and a circular accommodating recess 211 for accommodating the steam box 80 is provided on the cover main body 21. Specifically, the steam box 80 is fixedly disposed above the pressure limiting valve 50, so that the steam box 80 can rotate synchronously with the pressure limiting valve 50, thereby making sealing easier.

In the technical solution of the present embodiment, the diameter of the exhaust channel 30 is in the range of 3.3-30 mm. And preferably, the diameter of the exhaust passage 30 is in the range of 4-10 mm. The large-caliber exhaust channel 30 can enable the exhaust speed of the electric pressure cooker to be higher, and the flavor extraction and juice collection effects are better.

In the technical solution of the present embodiment, the length of the exhaust passage 30 is in the range of 3-30 mm. And preferably, the length of the exhaust passage 30 is in the range of 5-15 mm. The section channel exhaust channel 30 can prevent the exhaust channel 30 from being blocked in the working process of the electric pressure cooker, and is convenient for a user to clean.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric pressure cooker, comprising:

the cooker body (10) comprises an outer cooker (11) and an inner cooker (12) arranged in the outer cooker (11), wherein the inner cooker (12) is used for containing food to be cooked;

the pot cover (20) is arranged on the pot body (10) and can be sealed on the inner pot (12), and the pot cover (20) is provided with an exhaust channel (30) communicated with the interior of the inner pot (12) and a pressure limiting valve (50) for controlling the ventilation state of the exhaust channel (30);

the driving mechanism comprises a power mechanism (40) for providing rotary motion of a rotary shaft and a thread transmission mechanism (60) for converting the rotation of the rotary shaft into up-and-down movement of the pressure limiting valve (50), and the thread transmission mechanism (60) comprises a thread column (62) and a thread hole (61) which are matched with each other;

the threaded column (62) is formed on the pressure limiting valve (50), the threaded hole (61) is formed on the pot cover (20), and the power mechanism (40) drives the pressure limiting valve (50) to rotate;

the driving mechanism further comprises a transmission mechanism (70), the transmission mechanism (70) comprises a gear (72) fixed on the rotating shaft and a tooth-shaped part (73) fixed on the pressure limiting valve (50), and the gear (72) and the tooth-shaped part (73) are meshed with each other;

the pressure limiting valve (50) includes:

the valve body (51), the said tooth-shaped portion (73) is set up on the outer sidewall of the said valve body (51), there are screw thread structures distributed along circumference on the outer sidewall of the said valve body (51) and form the said screw thread post (62);

the plug (52) is arranged in the valve body (51) and is positioned above the exhaust channel (30), an elastic reset piece (53) is arranged between the plug (52) and the valve body (51), and when the exhaust channel (30) is exhausted, the transmission mechanism (70) drives the valve body (51) to move along the vertical direction so as to control the compression amount of the elastic reset piece (53), so that the pressure at two ends of the plug (52) is balanced;

the pressure limiting valve (50) further comprises a positioning ring (54), the plug (52) is connected to the inner side of the positioning ring (54) through a connecting rod (55), the positioning ring (54) is arranged in the valve body (51) in a penetrating mode, and the outer diameter of the positioning ring (54) is matched with the inner diameter of the valve body (51) so that the plug (52) can move up and down in the valve body (51) along a straight line;

the diameter of the exhaust passage (30) is in the range of 3.3-30 mm.

2. Electric pressure cooker according to claim 1, characterized in that the power mechanism (40) is a stepper motor (71).

3. The electric pressure cooker according to claim 1, characterized in that the cooker cover (20) comprises a cooker cover main body (21) and an inner cooker cover (22) provided on the cooker cover main body (21), wherein the exhaust passage (30) is formed on the inner cooker cover (22), and the pressure limiting valve (50) and the driving mechanism are both located above the inner cooker cover (22).

4. An electric pressure cooker as claimed in claim 3, characterized in that it further comprises a steam box (80) arranged above the pressure limiting valve (50), the steam box (80) being circular in cross section, the cover body (21) being provided with a circular accommodation recess (211) accommodating the steam box (80).

5. Electric pressure cooker according to claim 1, characterized in that the diameter of the exhaust channel (30) is in the range of 4-10 mm.

6. Electric pressure cooker according to claim 1, characterized in that the length of the exhaust channel (30) is in the range of 3-30 mm.

7. Electric pressure cooker according to claim 6, characterized in that the length of the exhaust channel (30) is in the range of 5-15 mm.