CN112190126A

CN112190126A - Pressure limiting device for pressure cooker

Info

Publication number: CN112190126A
Application number: CN202010938408.9A
Authority: CN
Inventors: 芦雷
Original assignee: Ningbo Runqiao Industrial Design Co ltd
Current assignee: Ningbo Runqiao Industrial Design Co ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2021-01-08

Abstract

A pressure limiting device for pressure cooker is composed of a pressure limiting valve and an air discharging bolt, wherein the pressure limiting valve comprises a valve core and a valve body, the valve core is composed of a heavy hammer, a spring and a valve plug, the valve body is provided with a valve cavity, an air discharging bolt connector and an air discharging hole, the valve cavity is formed by connecting a thread cavity, a barrel cavity and a trapezoid cavity in series, the bottom of the heavy hammer is provided with a geometric body which can be tightly matched with the trapezoid cavity, the top of the heavy hammer is provided with a spring limiting column, the valve plug is provided with altitude or pressure scales, the side wall of the valve plug is provided with a thread which is matched with the thread of the thread cavity, and when the compression length of the spring is equal to the thread pitch of the thread, the generated elastic force is equal to the increased pressure which can still; the upper end of the valve body is provided with a scale indication arrow, when the valve plug rotates to a certain scale indicated by the arrow from the initial position, the elastic force generated by the precession compression spring is equal to the pressure required to be increased on the heavy hammer when the high-pressure cooker with the poster height indicated by the scale can be normally used.

Description

Pressure limiting device for pressure cooker

Technical Field

The invention relates to the technical field of household appliances, in particular to a pressure limiting device of a pressure cooker.

Background

The pressure cooker is also called as a pressure cooker, and can be used for solving the problem of half-cooked rice in high altitude areas, because the pressure cooker can ensure that the boiling point of water is not lower than 100 ℃, but for the electric pressure cooker heated by fire or without a temperature control link, because the time for cooking rice (and other various food materials) is obtained according to the set temperature, the boiling point in the pressure cooker in the high altitude areas can be higher than 100 ℃, but can not reach the set temperature, the half-cooked rice can also appear in the set time, namely the electric pressure cooker can not be normally used. To solve the technical problem, a technical scheme of a pressure limiting structure and a pressure cooker with the pressure limiting structure is provided in China patent publication No. CN 111345672A published in 6/30 of 2020, 6/30 of Zhuhaigeli electric appliance, Inc., Wang Jun, Li Shao and the like, and a structure capable of realizing multi-stage pressure limiting is expected to be adopted, so that the pressure in the cooker is increased by increasing the weight of a heavy hammer for plugging an exhaust port, the boiling point of water in the cooker reaches a set temperature, and the set heating time is suitable. However, this solution has the following drawbacks and disadvantages: 1. as can be seen from fig. 2, 10 or 18 of the specification, in which the pressing column 136 and the adjusting part 140 are pressed on the first weight 131, in fig. 18, no matter where the adjusting part 140 is rotated, the second weight 132, the third weight 133 and the fourth weight 134 are pressed on the pressing column 136 or the adjusting part 140, that is, all the above parts are pressed on the first weight 131, which means that the weight is not changed as if a person carries a heavy object on the weighing platform, either by head pushing or shoulder carrying, and the weight is changed, and the change of the number of weights pressed on the first weight 131 and the change of the pressure cannot be realized by rotating the adjusting part 140. Therefore, the push assembly 150 for controlling the rotation of the adjustment member 140 is also useless. 2. The technical effect that this scheme not only can not realize its wants to reach, the subassembly is many moreover, with high costs, the structure is complicated, can't be applied to current pressure cooker product, and its structure also does not have the requirement of the product of worrying about reliability, stability, durability, convenience, aesthetic property at all, can't be accepted by the market. 3. The user may know the altitude according to the mobile phone or the sports watch, but may not know the weights, and the probability that the weights matched with the actual altitude are heavy is not that the weights can be combined by four weights, so the factory-set heating time is still not suitable. 4. The weight is not together with the pot cover and is easy to lose.

Disclosure of Invention

The invention aims to overcome the defects and shortcomings of the prior art, and provides a pressure limiting device of a pressure cooker, which has small volume, few components, simple structure, convenient installation and use and can accurately adjust the pressure according to the altitude, and the technical scheme of the invention is as follows: the pressure limiting device for pressure cooker consists of a pressure limiting valve and an exhaust cock, wherein the pressure limiting valve comprises a valve core and a valve body, and is characterized in that: the valve core is composed of a heavy hammer, a spring and a valve plug, the valve body is provided with a valve cavity, an exhaust bolt interface and an air leakage hole, the valve cavity is formed by connecting a thread cavity, a barrel cavity and a trapezoidal cavity in series, the bottom of the heavy hammer is provided with a geometric body which can be tightly matched with the trapezoidal cavity, the top of the heavy hammer is provided with a spring limiting column, the valve plug is provided with altitude or pressure scales, the side wall of the valve plug is provided with a thread matched with the thread of the thread cavity, and when the compression length of the spring is equal to the thread pitch of the thread, the generated elastic force is equal to the increased pressure required by the normal use of the pressure cooker in the highest altitude area required by; the upper end of the valve body is provided with a scale indication arrow, when the valve plug rotates to a certain scale indicated by the arrow from the initial position, the elastic force generated by the precession compression spring is equal to the pressure required to be increased on the heavy hammer when the high-pressure cooker with the poster height indicated by the scale can be normally used.

The invention provides a method and a device for conveniently and accurately setting the required pressure according to the actual altitude, and the device can be normally used only by rotating the valve plug to enable the indicating arrow at the upper end of the valve body to align with the scale corresponding to the altitude; compared with the prior art, the device has the beneficial technical effects of accurate setting, convenient use, few components, simple structure, cost and space saving, is convenient to match with the existing product, is attractive and exquisite, can directly form the product, and saves the secondary development link of productization.

Drawings

FIG. 1 is a diagram showing an appearance effect of example 1 of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an exploded, assembled view of FIG. 1;

FIG. 4 is a block diagram of the valve body of FIG. 2;

FIG. 5 is a front view of FIG. 4;

FIG. 6 is a perspective view of the weight of FIG. 3;

FIG. 7 is a perspective view of a weight with a spherical crown shape at the bottom.

Wherein: 1 case, 1.1 is the weight, 1.2 valve plugs, 1.3 is the spring, 2 is the valve body, 2.1 is the valve pocket, 2.11 is the thread cavity, 2.12 is the bucket die cavity, 2.13 is the ladder-shaped chamber, 2.2 is the core interface of venting bolt, 2.3 is the passageway of losing air, 2.4 level scale indication arrow, 3 is the venting bolt.

The invention is further described below with reference to the figures and examples.

Example 1

Referring to fig. 1-6, this embodiment is an example of an improved pressure limiting device for an autoclave, the original pressure limiting valve is 80 g, the diameter of the exhaust port is 4 mm, and it can be calculated that when the pressure limiting device is used at 0 altitude, the boiling point of water is about 114 ℃, and at this time, the pressure in the autoclave is 163kPa, so that, when the altitude is 5000 m, the pressure in the autoclave is 163 kPa-49 kPa =114 kPa, and at this time, the boiling point of water in the autoclave is about 103 ℃, although it can still exceed 100 ℃, it is obvious that the rice cannot be cooked according to the original set time, and other food materials cannot reach the set cooking degree, that is, the pressure limiting device cannot be normally used. Therefore, there is a need for improvement thereof. This embodiment is at first with upper portion be equipped with the screw thread, can with the pressure limiting valve fastening butt joint with the mouth footpath exhaust bolt 3 replace former exhaust rod, the pressure limiting valve include case 1, valve body 2, case 1 constitute by weight 1.1, valve plug 1.2 and spring 1.3, valve body 2 be equipped with valve pocket 2.1, exhaust bolt interface 2.2 and disappointing hole 2.3, valve pocket 2.1 concatenate by the thread cavity 2.11 of axis coincidence, barrel-shaped chamber 2.12 and trapezoidal chamber 2.13 and form, weight 1.1 bottom be can with trapezoidal chamber 2.13 closely cooperate the cone, the top is equipped with spacing post, sealed pad 1.2 cover on above-mentioned reference column, valve plug 1.2 above be equipped with 0-5000 meters height above elevation scale, the lateral wall be the screw thread that matches with the screw thread cavity 2.11, this screw thread M22 standard screw thread, the diameter is 22mm promptly, the pitch is 2.5mm, spring 1.3 be stainless steel, its effective 5.5 turns of 5 The wire diameter is 0.6mm, the central diameter is 2mm, the length is 6.6mm, according to the parameter setting, when the valve plug 1.2 rotates a circle, namely the precession distance is 2.5mm, the spring 1.3 can generate about 0.64N pressure to the counter weight 1.1, the pressure in the cooker can reach 163kPa, and the pressure cooker can be normally used in the area with 5000 m altitude as in the area with 0 altitude. The upper end of the valve body 2 is provided with a scale indication arrow 2.4, when the valve plug 1.1 rotates to a certain scale indicated by the arrow 2.4 from the initial position, the elastic force generated by the screwing compression spring is equal to the pressure which needs to be increased on the heavy hammer when the poster height pressure cooker indicated by the scale can be used normally. The valve plug 1.2 is provided with a slotted hole for accommodating the spring at the lower central position, so as to save the space required by the spring. According to the description, the pressure cooker has the advantages of being reasonable in design, simple in structure, few in components, small in size, cost-saving, convenient to operate, capable of accurately and conveniently adjusting the required pressure according to actual needs, and capable of enabling the pressure cooker to normally use in high-altitude areas.

Example 2

Referring to fig. 1-5 and fig. 7, the difference between this embodiment and embodiment 1 is mainly that the geometric shape of the bottom of the weight 1.2 that can be tightly fitted with the trapezoidal cavity 2.13 is a combination of a trapezoidal table and a spherical cap. The rest of the parts which are not related are the same as those in the embodiment 1, and the description is omitted.

It should be noted that all the equivalent transformation, or different expressions with the same essential meaning, which are directly or indirectly applied to other related technical fields, made by using the contents of the present specification and the attached drawings, are within the protection scope of the present invention.

Claims

1. The pressure limiting device for pressure cooker consists of a pressure limiting valve and an exhaust cock, wherein the pressure limiting valve comprises a valve core and a valve body, and is characterized in that: the valve core is composed of a heavy hammer, a spring and a valve plug, the valve body is provided with a valve cavity, an exhaust bolt interface and an air leakage hole, the valve cavity is formed by connecting a thread cavity, a barrel cavity and a trapezoidal cavity in series, the bottom of the heavy hammer is provided with a geometric body which can be tightly matched with the trapezoidal cavity, the top of the heavy hammer is provided with a spring limiting column, the valve plug is provided with altitude or pressure scales, the side wall of the valve plug is provided with a thread matched with the thread of the thread cavity, and when the compression length of the spring is equal to the thread pitch of the thread, the generated elastic force is equal to the increased pressure required by the normal use of the pressure cooker in the highest altitude area required by; the upper end of the valve body is provided with a scale indication arrow, when the valve plug rotates to a certain scale indicated by the arrow from the initial position, the elastic force generated by the precession compression spring is equal to the pressure required to be increased on the heavy hammer when the high-pressure cooker with the poster height indicated by the scale can be normally used.