CN101099635A

CN101099635A - Electromagnetic/electric pressure cooker structure improvement

Info

Publication number: CN101099635A
Application number: CNA2007100295667A
Authority: CN
Inventors: 李荣明; 汪振中; 韦建喜
Original assignee: DONGGUAN QIANFENG ELECTRONICS Co Ltd
Current assignee: DONGGUAN QIANFENG ELECTRONICS Co Ltd
Priority date: 2007-07-30
Filing date: 2007-07-30
Publication date: 2008-01-09

Abstract

The present invention belongs to the field of pressure cooker technology. Specially, it relates to an improvement of pressure cooker structure with electromagnetic heating function or electroheating function. It mainly includes the following several portions: outer pot, inner pot, upper lid, heating system, pressure switch, pressure detection circuit, chip microprocessor and its control device. Said invention also provides its working principle and concrete operation method.

Description

Electromagnetic/electric pressure cooker structure improvement

Technical field:

The present invention relates to the pressure cooker technical field, refer in particular to a kind of electromagnetism heating or electrically heated pressure cooker structural improvement contained.

Background technology:

Pressure cooker develops into electronic type by the earliest mechanical type, and the pressure cooker of electronic type is by single-chip microcomputer (MCU) control and show corresponding data, intuitive and controlled better.

Along with the development of electronics technology, the mode of heating of electronic pressure pot has electromagnetism heating and electric heating heating, and the electromagnetism heating is with respect to the electric heating heating, and security is better.

For application number is the patent application of " 200510072148.7 " and " 200510085431.3 ", in its disclosed electromagnetic heating pressure cooking device, pot inner pressure is by being connected on the switch control on the electromagnetic heater circuit, then electromagnetic heater heating of switch connection, switch disconnect and then stop heating; This switch on and off is by flexible member displacement control, and flexible member is to be driven by interior pot or loam cake.The weak point that this structure exists is that switch is directly cut off the electricity supply, easily arcing, and sparking damages contact, can not realize the power adjustment, and switch on and off is that flexible member reflects steam pressure indirectly, sensitivity and precision deficiency by flexible member displacement control in addition; This structure is comparatively complicated in addition, and processing and fabricating inconvenience is difficult for maintenance.

Summary of the invention:

The object of the present invention is to provide a kind of electromagnetic/electric pressure cooker structure improvement of controlling pot inner pressure by signal detection.

Still a further object of the present invention is to provide a kind of direct controlled pressure switch that is used for of pot inner pressure that utilizes, and is active in one's movements the electromagnetic/electric pressure cooker structure improvement that pressure controling precision is high.

Another object of the present invention is to provide electromagnetic/electric pressure cooker structure improvement a kind of simple in structure, simple for production.

For achieving the above object, pressure cooker of the present invention is contained electromagnetism heating or electrically heated pressure cooker, it comprises outer pot, interior pot, loam cake and electromagnetism or electric heating system, the one deformation lid that deformation can take place under the pot inner pressure effect suitably is being set on the side surface within the loam cake, the deformation of deformation lid touches a pressure switch, and pressure switch is connected with single-chip microcomputer (MCU) in the pressure cooker through a pressure detection circuit.

Protrude out towards loam cake inside among the deformation lid, be dish; Part is multistage among the deformation lid protrudes out.

Inlaid hole is left in the corresponding deformation lid of loam cake installation site, and the deformation lid embeds behind the inlaid hole of loam cake by the screw administration of fixed or adopts riveted and fixed, and in deformation lid and loam cake joint ring-like rubber sealing is arranged.

Pressure switch is a signaling switch, and its signal that sends flows to the single-chip microcomputer in the pressure cooker after pressure detection circuit filtering; Leave external fine setting screw rod on the pressure switch, for regulating the pressure touch points.

The present invention is provided with the deformation lid on the inboard surface that touches with steam of loam cake, directly act on the deformation lid by pot inner pressure, when being deflected into to a certain degree, touches on the deformation lid logical pressure switch, pressure switch flows to the interior single-chip microcomputer of pressure cooker after sending the filtering of signal process pressure detection circuit, send instruction after single-chip microcomputer received signal and comparative analysis are handled and adjust electromagnetism heating or electrically heated power, and need not cut off the electricity supply.Deformation lid directly with pot in steam touches, and pressure switch outputs signal to single-chip microcomputer, sends instruction control heating by single-chip microcomputer, realizes control automatically, action sensitivity is good, reflection in time can prevent pressure overshoot, effectively improves pressure controlled accuracy.

Description of drawings:

Accompanying drawing 1 is package assembly schematic diagram of the present invention;

Accompanying drawing 2 is the partial structurtes enlarged drawing of Fig. 1;

Accompanying drawing 3 is the present invention's circuit theory diagrams.

The specific embodiment:

The present invention will be further described below in conjunction with accompanying drawing:

See shown in the accompanying drawing 1～3, the present invention mainly comprises outer pot 1, interior pot 2, loam cake 3 and electromagnetism or electric heating system (not shown), electromagnetism or electric heating system are installed in outer pot 1 lower bottom part, interior pot 2 is contained in the

outer pot

1, and 2 times bottoms of interior pot are positioned at the top of electromagnetism or electric heating system, satisfy the requirement of heating, electromagnetism or electric heating system are by the Single-chip Controlling of pressure cooker.Pot 2 upper port in loam cake 3 is placed on, and have O-ring seal 4 to be tightly connected, obtain the boiling space of sealing thus.The one deformation lid 5 that deformation can take place under the pot inner pressure effect suitably is being set on the side surface within the loam cake 3, and deformation is covered 5 deformation and is touched a pressure switch 6, and pressure switch 6 is connected with single-chip microcomputer (MCU) in the pressure cooker through a pressure detection circuit 7.Pressure switch 6 is installed in the loam cake 3, and has the contact arm 61 that stretches out to reach deformation to cover 5 upsides, and the gap that contact arm 61 and deformation are covered between 5 upsides can be adjusted by fine setting screw rod 62, adjust detected pressures thus.The adjustable side of fine setting screw rod 62 extends to loam cake 3 upper surfaces, and has glue lid 63 to hide, and opens glue lid 63 and can realize manual adjustments fine setting screw rod 62, thereby regulate the operating pressure of pressure switch 6, is pot inner pressure.

Protrude out towards loam cake 3 inside among the deformation lid 5, be dish; In the present embodiment, part is multistage among the deformation lid 5 protrudes out, and obtains preferable elastic construction with this, and the deformation effect is remarkable.Loam cake 3 corresponding deformation are covered 5 installation sites and are left inlaid hole, deformation lid 5 embeds behind the inlaid hole of loam cakes 3 by the screw administration of fixed, also can adopt the mode of bending riveted to fix, in deformation lid 5 and loam cake 3 joints ring-like cushion rubber 8 sealings are arranged, ring-like cushion rubber 8 can prevent that steam from leaking from the joint of deformation lid 5 with loam cake 3.Like this, when cooking work, pot inner pressure directly acts on deformation lid 5, makes it deformation, utilizes deformation lid 5 can transmit pot inner pressure rapidly on pressure switch 6, and action is fast, and pressure detecting is timely.

Pressure switch 6 is a signaling switch, inductance R102 and the capacitor C 101 of its signal that sends in pressure detection circuit 7 formed the single-chip microcomputer (MCU) that flows to after the filter circuit filtering in the pressure cooker, and single-chip microcomputer is analyzed processing to the received signal, send instruction control electromagnetism or electric heating system subsequently, adjust heating power.

Operation principle is as follows: connect power supply, after setting relevant parameter on the control panel or selecting corresponding modes, water and food in electromagnetism or electric heating system begin to heat in the pot 2, pot inner pressure rises, and in acting on the inner surface of pot 2, loam cake 3 and deformation lid 5, deformation is covered 5 pressurizeds and towards protruding out direction deformation.When pot inner pressure acquired a certain degree, deformation was covered 5 deformation and is touched

pressure switch

6, and 6 of pressure switches are sent signal immediately and given single-chip microcomputer (MCU), adjust heating power voluntarily by single-chip microcomputer, thereby the control pot inner pressure prevents pressure overshoot, energy savings.Afterwards, the corresponding decline of pot inner pressure, deformation lid 5 resets, heating power before single-chip microcomputer recovers voluntarily, so circulation, pot inner pressure is controlled on certain force value all the time, until finishing boiling.

Claims

1, electromagnetic/electric pressure cooker structure improvement, mainly comprise outer pot, interior pot, loam cake and heating system, it is characterized in that: a deformation lid that deformation can take place under the pot inner pressure effect suitably is being set on the side surface within the loam cake, the deformation of deformation lid touches a pressure switch, and pressure switch is connected with single-chip microcomputer (MCU) in the pressure cooker through a pressure detection circuit.

2, electromagnetic/electric pressure cooker structure improvement according to claim 1 is characterized in that: protrude out towards loam cake inside among the deformation lid, be dish.

3, electromagnetic/electric pressure cooker structure improvement according to claim 1 and 2, it is characterized in that: inlaid hole is left in the corresponding deformation lid of loam cake installation site, deformation lid embeds behind the inlaid hole of loam cake by the screw administration of fixed or adopts riveted and fixed, and in deformation lid and loam cake joint ring-like rubber sealing is arranged.

4, electromagnetic/electric pressure cooker structure improvement according to claim 1 is characterized in that: pressure switch is a signaling switch, and its signal that sends flows to the single-chip microcomputer (MCU) in the pressure cooker after pressure detection circuit filtering.

5, electromagnetic/electric pressure cooker structure improvement according to claim 2 is characterized in that: part is multistage among the deformation lid protrudes out.

6, according to claim 1 or 4 described electromagnetic/electric pressure cooker structure improvements, it is characterized in that: leave external fine setting screw rod on the pressure switch.