CN111856175A - Electromagnetic interference test auxiliary device of electromagnetic stove - Google Patents
Electromagnetic interference test auxiliary device of electromagnetic stove Download PDFInfo
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- CN111856175A CN111856175A CN201910349325.3A CN201910349325A CN111856175A CN 111856175 A CN111856175 A CN 111856175A CN 201910349325 A CN201910349325 A CN 201910349325A CN 111856175 A CN111856175 A CN 111856175A
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- pot
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- induction cooker
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/02—Level control, e.g. controlling quantity of material stored in vessel without auxiliary power
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Electromagnetism (AREA)
- Cookers (AREA)
Abstract
The invention relates to an electromagnetic interference test auxiliary device of an electromagnetic stove, which comprises a test pot arranged on the electromagnetic stove, an auxiliary pot fixedly arranged on a test bench and communicated with the test pot, a bracket connected between the auxiliary pot and the test pot, and a water replenishing device connected with the auxiliary pot through a connecting pipe, wherein a switch valve is arranged on the connecting pipe. The invention provides a method for solving the problems of pot displacement and incapability of meeting the requirement of testing time length of water quantity in a pot in the EMI testing process of an induction cooker, and relates to an electromagnetic interference testing auxiliary device of the induction cooker. The continuity of the test process and the accuracy of the test result are ensured.
Description
Technical Field
The invention relates to the technical field of electromagnetic stove testing, in particular to an electromagnetic interference testing auxiliary device of an electromagnetic stove.
Background
An Electromagnetic Interference (EMI) test is a test that is required to be performed before an Electromagnetic product is sold to meet the relevant EMI test specification. When an EMI test of an electromagnetic oven is performed, the existing test method is: place a pan that contains water on the induction cooker, and then utilize electromagnetic interference testing arrangement to test the induction cooker, but at the test procedure, have following problem:
because the cookware can not be fixed on the induction cooker, the cookware deviates from the original position in the heating process due to the resonance relation generated when the cookware is electromagnetically heated in the test process, so that the heating power of the induction cooker is changed, and the EMI reading data deviates from the reality;
in the test process, a small-diameter pot with the diameter of 120mm and the height of 75mm is usually adopted, and the maximum power of the electromagnetic stove can reach 3000W, so that water in the pot can be heated quickly, a large amount of water can splash outwards in the boiling process, flows to the bottom of the pot along the wall of the pot, and forms a water film at the bottom of the pot, and the water film can resonate along with the pot, so that the pot is further deviated, and the measured EMI (electro-magnetic interference) conduction data is incorrect;
The water amount in the cooker can be continuously reduced due to boiling and outward splashing and evaporation of water vapor in the heating process of the electromagnetic stove, particularly, the water can be even burnt out when a radiation test is carried out, and the heating state of the electromagnetic stove can be influenced by adding water, so that the EMI reading data is deviated from reality; therefore, the water quantity is required to be kept at 50% according to the standard requirement at any time in the testing process;
the electromagnetic cooker heats water in the cooker, because of factors such as splashing and steam, the water quantity is reduced, and when adding water, the water temperature of the added water also influences the test data.
From the above, it can be known that whether the pot is fixed or not, and the change of the temperature and the water amount of the added water have a great influence on the EMI conduction test and the radiation test result of the electromagnetic oven. And the domestic products have small margins when the tests are carried out, and under the condition of insufficient margins, the test deviation is large, so that a plurality of products do not meet the national requirements.
Disclosure of Invention
The invention aims to solve the technical problem of providing an electromagnetic interference test auxiliary device of an electromagnetic stove, which can avoid the displacement of a cooker in the test process, can ensure the stability of the water level and the water temperature in the cooker and further improve the test data precision.
The technical scheme adopted by the invention for solving the problems is as follows: the utility model provides an electromagnetic interference test auxiliary device of induction cooker which characterized in that: comprises that
The test pot is placed on the induction cooker;
the auxiliary pot is fixedly arranged on the test board and communicated with the test pot;
the bracket is connected between the auxiliary pot and the test pot;
the water replenishing device is connected with the auxiliary pot through a connecting pipe, and a switch valve is arranged on the connecting pipe.
For the water level in more accurate regulation test pan, conveniently carry out the later stage whole work of experiment simultaneously, supplementary pan is provided with the outlet on being close to the lateral wall of bottom, install the outlet valve on the outlet.
Preferably, the test pot and the auxiliary pot are connected through a communication pipe.
Conveniently, be provided with the takeover that is linked together with supplementary pan inner chamber on the lateral wall that supplementary pan is close to the bottom, the one end of communicating pipe is connected on the takeover, and the other end stretches into in the test pan and deepens to the bottom of test pan.
Simply, the support is including two piece at least body of rods, and the one end fixed connection of every body of rod is on supplementary pan, and other end joint is on the test pan.
In order to ensure the temperature of the auxiliary pot for supplementing water into the test pot and further effectively ensure the accuracy of a test result, the auxiliary pot temperature-keeping device also comprises a heat-preserving part which can preserve heat for the auxiliary pot.
Simply, the heat-insulating member is a heater or a lid body covering the opening of the auxiliary pot.
Preferably, the volume of supplementary pan is greater than the volume of test pan, the volume of moisturizing ware is greater than the volume of supplementary pan.
Optionally, the water replenishing device is a self-heating water replenishing container or an external heating water replenishing container.
Preferably, the water replenishing device is an electric heating cylinder.
Compared with the prior art, the invention has the advantages that: the auxiliary device for the electromagnetic interference test of the induction cooker creatively provides a solution to the problems that the cookware is displaced and the water quantity in the cookware cannot meet the requirement of the test duration in the EMI test process of the induction cooker. Meanwhile, the auxiliary pot and the water replenishing device are used for replenishing boiling water for the test pot, and the water temperature of the replenished water is prevented from influencing the test result. In addition, the water level information of the testing pot in the testing process can be rapidly acquired through the auxiliary pot, the dry burning condition is avoided, water can be conveniently and timely supplemented, and the continuity of the testing process and the accuracy of the testing result are also guaranteed.
Drawings
Fig. 1 is a perspective view of an electromagnetic interference test auxiliary device of an electromagnetic cooker in an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1, the electromagnetic interference testing auxiliary device of the electromagnetic cooker in the embodiment includes a testing pot 1, an auxiliary pot 3, a bracket 5, a water replenishing device 6, and a communicating pipe 9. In this embodiment, the volume of the auxiliary pot 3 is larger than that of the test pot 1, and the volume of the water replenishing device 6 is larger than that of the auxiliary pot 3.
When testing, generally there is testboard 4, place the induction cooker 2 that will test on testboard 4 to be connected induction cooker 2 and corresponding EMI testing arrangement, in order to conveniently gather the EMI test result of induction cooker 2.
And the test pot 1 is placed in the test area on the induction cooker 2. Typically the test pots 1 use pots with a diameter of 14cm and a diameter of 20 cm.
The auxiliary pot 3 is fixedly arranged on the test table 4, the auxiliary pot 3 in the embodiment adopts a pot with a rectangular cross section to conveniently calculate the water level, and the pot with a side length of 40cm and a rectangular cross section is specifically adopted in the embodiment. The auxiliary pot 3 is communicated with the testing pot 1 through a communicating pipe 9. Supplementary pan 3 is with the concrete intercommunication structure of test pan 1: the lateral wall that supplementary pan 3 is close to the bottom is provided with the takeover that is linked together with supplementary pan 3 inner chamber, and the one end of communicating pipe 9 is connected on the takeover, and the other end stretches into in test pan 1 and deepens to the bottom of test pan 1. So, when the atmospheric pressure was balanced in test pan 1 and supplementary pan 3, the water level in the test pan 1 and the water level in the supplementary pan 3 keep unanimous, through adjusting the water level in the supplementary pan 3, can realize the regulation of the water level in the test pan 1. The water level that needs in the test pan 1 usually keeps in the half high position of pan height, marks this water level on supplementary pan 3, can be convenient test the water level in the pan 1, guarantees that the water level in the test pan 1 keeps relatively stable. In order to more accurately control the water level of the testing pot 1, a water outlet is arranged on the side wall of the auxiliary pot 3 close to the bottom, and a water outlet valve 31 is arranged on the water outlet. If the water level in the testing pot 1 is too high, the drain valve 31 can be opened to drain water, and when the water level reaches the set water level, the drain valve 31 is closed. Meanwhile, when the experiment is finished, the drain valve 31 can be opened to drain water, so that the water in the test pot 1 can be conveniently treated.
Support 5 is connected between supplementary pan 3 and test pan 1, and support 5 includes two piece at least body of rod, and the one end fixed connection of every body of rod is on supplementary pan 3, and other end joint can set up the joint part through the tip at the body of rod on test pan 1, carries out the joint with some on the test pan 1 special parts such as handles to fixed test pan 1 also conveniently takes off the body of rod from test pan 1, changes test pan 1. Because supplementary pan 3 is fixed on testboard 4, so utilize the body of rod to be connected the back with test pan 1, then the position of pan on induction cooker 2 is then fixed, can not take place the condition of skew because of producing resonance with induction cooker 2 again.
The water replenishing device 6 is connected with the auxiliary pot 3 through a connecting pipe 7, a switch valve 8 is arranged on the connecting pipe 7, and the connection or disconnection between the auxiliary pot 3 and the water replenishing device 6 is realized through the switch valve 8. This moisturizing ware 6 can select the moisturizing container that can carry out self-heating, or the moisturizing container of external heating, and the during operation cooperation external heating source use can. For convenience of operation, the water replenishing device 6 in this embodiment is an electric heating cylinder.
Because the water in the auxiliary pot 3 needs to be supplemented into the test pot 1, the temperature of the water in the pot is required to be kept close to the boiling temperature, a heat preservation part is also configured for the auxiliary pot 3 in the embodiment, the heat preservation part can select a heater for heating the auxiliary pot 3 or a cover body covering the opening of the auxiliary pot 3, and the experimental result is basically not different through the test.
The working process of the electromagnetic interference test auxiliary device of the electromagnetic stove is as follows: when the work is started, room temperature water is added into the testing pot 1, so that the water level reaches the position of 150% of the height of the testing pot. And simultaneously, the switch valve 8 is opened to inject the water boiled in the water replenishing device 6 into the auxiliary pot 3 until the water level in the auxiliary pot 3 reaches the initial water level which is flush with the water level in the testing pot 1, and the switch valve 8 is closed at the moment. Electromagnetic range 2 starts to test, along with electromagnetic range 2's work, the water in the test pan 1 is constantly heated and then reaches the state of boiling. Usually, when the water in the test pot 1 reaches above 70 ℃, the water level in the test pot 1 begins to drop, and the EMI test result of the induction cooker 2 is affected when the water level in the test pot 1 drops by 1 cm. And when the water level to the diameter is 1cm for 14cm test pan 1 descends 1cm, then the water level in the supplementary pan 3 can descend 0.385cm, so can be when the water level in the supplementary pan 3 descends 0.3cm, open switch valve 8 in advance, and then adjust the water level in the supplementary pan 3 to initial water level, because test pan 1 and supplementary pan 3 are in the connected state, then the water level in the test pan 1 also can reach the water level position of pan 50% height. When the water level of the testing pot 1 with the diameter of 20cm is reduced by 1cm, the water level in the auxiliary pot 3 is reduced by 0.785cm, so that the water level in the auxiliary pot 3 is reduced by 0.7cm, the switch valve 8 is opened in advance, the water level in the auxiliary pot 3 is adjusted to the initial water level, and the water level in the testing pot 1 can reach the water level position with the height of 50% of the pot due to the fact that the testing pot 1 and the auxiliary pot 3 are in a communicated state. For convenient observation, scales are arranged on the auxiliary pot 3. The auxiliary pot 3 can adopt a transparent glass pot, the communicating pipe 9 adopts a non-metal hose, and the auxiliary pot 3 and the communicating pipe 9 which adopt the support made of non-metal materials can not influence the test structure.
Above test procedure both can guarantee the condition that in-process test pan 1 does not appear shifting, can also the water level in the effectual assurance test pan 1 satisfies the test requirement, the condition of dry combustion method can not appear, simultaneously because what add is boiling water, then can not exert an influence to the test result, can reduce electromagnetic oven 2's EMI test error to the minimum, the temperature of adding water can be fine evaded, the test deviation that the water yield change too big arouses, the maximize makes the data that obtain in electromagnetic oven 2's the EMI test procedure be close to the true value, improve the measuring accuracy.
Claims (10)
1. The utility model provides an electromagnetic interference test auxiliary device of induction cooker which characterized in that: comprises that
The test pot (1) is placed on the electromagnetic stove (2);
the auxiliary pot (3) is fixedly arranged on the test bench (4) and communicated with the test pot (1);
the bracket (5) is connected between the auxiliary pot (3) and the testing pot (1);
the water replenishing device (6) is connected with the auxiliary pot (3) through a connecting pipe (7), and a switch valve (8) is arranged on the connecting pipe (7).
2. The induction cooker electromagnetic interference test auxiliary device according to claim 1, characterized in that: the auxiliary pot (3) is provided with a water outlet on the side wall close to the bottom, and a water outlet valve (31) is installed on the water outlet.
3. The induction cooker electromagnetic interference test auxiliary device according to claim 1, characterized in that: the testing pot (1) and the auxiliary pot (3) are connected through a communicating pipe (9).
4. The induction cooker electromagnetic interference test auxiliary device according to claim 3, characterized in that: the auxiliary pot (3) is provided with a connecting pipe communicated with the inner cavity of the auxiliary pot (3) on the side wall close to the bottom, one end of the communicating pipe (9) is connected to the connecting pipe, and the other end of the communicating pipe extends into the testing pot (1) and extends deep to the bottom of the testing pot (1).
5. The induction cooker electromagnetic interference test auxiliary device according to any one of claims 1 to 4, characterized in that: support (5) are including two piece at least body of rod, and the one end fixed connection of every body of rod is on supplementary pan (3), and the other end joint is on test pan (1).
6. The induction cooker electromagnetic interference test auxiliary device according to any one of claims 1 to 4, characterized in that: also comprises a heat preservation component which can preserve heat for the auxiliary pot (3).
7. The induction cooker electromagnetic interference test auxiliary device according to claim 6, characterized in that: the heat preservation component is a heater or a cover body which covers the opening of the auxiliary pot (3).
8. The induction cooker electromagnetic interference test auxiliary device according to any one of claims 1 to 4, characterized in that: the volume of supplementary pan (3) is greater than the volume of test pan (1), the volume of moisturizing device (6) is greater than the volume of supplementary pan (3).
9. The induction cooker electromagnetic interference test auxiliary device according to any one of claims 1 to 4, characterized in that: the water replenishing device (6) is a water replenishing container capable of self-heating or an externally-heating water replenishing container.
10. The induction cooker electromagnetic interference test auxiliary device according to claim 9, characterized in that: the water replenishing device (6) is an electric heating cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910349325.3A CN111856175A (en) | 2019-04-28 | 2019-04-28 | Electromagnetic interference test auxiliary device of electromagnetic stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910349325.3A CN111856175A (en) | 2019-04-28 | 2019-04-28 | Electromagnetic interference test auxiliary device of electromagnetic stove |
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| Publication Number | Publication Date |
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| CN111856175A true CN111856175A (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910349325.3A Pending CN111856175A (en) | 2019-04-28 | 2019-04-28 | Electromagnetic interference test auxiliary device of electromagnetic stove |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002017684A2 (en) * | 2000-08-18 | 2002-02-28 | Luxine Inc. | Induction heating and control system and method with high reliability and advanced performance features |
| CN203535132U (en) * | 2013-09-30 | 2014-04-09 | 中标能效科技（北京）有限公司 | Electromagnetic cooker energy efficiency automatic testing device |
| CN104761013A (en) * | 2015-03-13 | 2015-07-08 | 河北工业大学 | Double-layer heat-insulating energy-saving device preparing fresh water with trough solar collector |
| CN204629618U (en) * | 2015-04-29 | 2015-09-09 | 上海出入境检验检疫局机电产品检测技术中心 | Energy efficiency of microwave cooker checkout gear |
| CN109991487A (en) * | 2017-12-29 | 2019-07-09 | 宁波方太厨具有限公司 | A kind of test device of electromagnetic stove |
-
2019
- 2019-04-28 CN CN201910349325.3A patent/CN111856175A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002017684A2 (en) * | 2000-08-18 | 2002-02-28 | Luxine Inc. | Induction heating and control system and method with high reliability and advanced performance features |
| CN203535132U (en) * | 2013-09-30 | 2014-04-09 | 中标能效科技（北京）有限公司 | Electromagnetic cooker energy efficiency automatic testing device |
| CN104761013A (en) * | 2015-03-13 | 2015-07-08 | 河北工业大学 | Double-layer heat-insulating energy-saving device preparing fresh water with trough solar collector |
| CN204629618U (en) * | 2015-04-29 | 2015-09-09 | 上海出入境检验检疫局机电产品检测技术中心 | Energy efficiency of microwave cooker checkout gear |
| CN109991487A (en) * | 2017-12-29 | 2019-07-09 | 宁波方太厨具有限公司 | A kind of test device of electromagnetic stove |
Non-Patent Citations (2)
| Title |
|---|
| 徐静 等: "家用电磁灶电磁兼容骚扰特性测试分析", 《电子质量》 * |
| 赵毅 等: "国内外家用电磁灶电磁骚扰比对研究", 《日用电器》 * |
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Application publication date: 20201030 |
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