Temperature measuring assembly for measuring surface temperature of electromagnetic heating coil

Abstract

The utility model discloses a temperature measuring assembly for measuring the surface temperature of an electromagnetic heating coil, which comprises a temperature sensor and a clamp tightly attached to the electromagnetic heating coil, and a probe of the temperature sensor obtains the surface temperature of a wire turn of the electromagnetic heating coil by detecting heat conducted by the clamp. The temperature measuring assembly not only can accurately detect the surface temperature of the wire turn, but also is simple in structure, small in occupied space and very convenient to install.

Description

Technical Field

[0001] The utility model relates to the field of temperature measurement of electromagnetic heating coils, in particular to a temperature measurement component for measuring the surface temperature of electromagnetic heating coil turns. Background Art

[0002] In cooking machines, using electromagnetic heating coils to heat ingredients is a relatively common method. However, since the electromagnetic heating coils will generate heat when energized, part of this heat comes from thermal eddy currents, and the other part comes from current consumption. When these two parts of heat are superimposed, if the design is unreasonable, it is very easy to cause the surface temperature of the electromagnetic heating coil turns to be very high, and in severe cases, the electromagnetic heating coils may be melted. Therefore, it is very important to measure the surface temperature of the electromagnetic heating coil turns. However, the current structure for measuring the surface temperature of the electromagnetic heating coil turns has the disadvantages of poor stability and inaccurate measurement. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a temperature measuring component for measuring the surface temperature of an electromagnetic heating coil, which has high reliability, can accurately measure the surface temperature of the electromagnetic heating coil turns and effectively prevent the electromagnetic heating coil from being overheated and fusing.

[0004] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0005] A temperature measuring assembly for measuring the surface temperature of an electromagnetic heating coil is provided, comprising a temperature sensor and a fixture tightly attached to the electromagnetic heating coil. The probe of the temperature sensor obtains the surface temperature of the turns of the electromagnetic heating coil by detecting heat conducted by the fixture.

[0006] Preferably, the fixture is divided into an inner base and an outer clamping plate, the wire turns are clamped between the inner base and the outer clamping plate, a blind hole channel is provided on the inner side of the inner base, and the probe of the temperature sensor is inserted into the blind hole channel.

[0007] Preferably, a sleeve is provided on the probe of the temperature sensor to prevent the probe from being torn off, and the inner end of the sleeve is embedded in the blind hole channel.

[0008] Preferably, a positioning column is provided on the side of the blind hole channel, and a positioning column is provided on the sleeve. Preferably, the cross-section of the outer splint is "L"-shaped, and a locking hole is provided on the outer splint for fixing the outer splint and the inner base together by screws.

[0009] Preferably, a fuse is fixedly connected to the outer side of the outer clamping plate for disconnecting the power supply circuit of the electromagnetic heating coil when the surface temperature of the wire turns exceeds a limit setting value.

[0010] The utility model realizes that the temperature measurement component can not only accurately detect the surface temperature of the wire turn, but also has a simple structure, occupies little space and is very convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a three-dimensional view of the temperature measuring component installed on the carrier tube.

[0012] Figure 2 yes Figure 1 Magnified view of point A in the middle.

[0013] Figure 3 This is a disassembled three-dimensional view of the temperature measurement component.

[0014] Figure 4 This is a disassembled stereoscopic view of a set of support components.

[0015] In the figure: carrier tube 1; electromagnetic heating coil 2; vertical bracket 3; strap 31; magnetic strip 4; outer cover 5; inner base 6; blind hole channel 61; positioning column 62; fastening ring 63; temperature sensor 7; sleeve 71; outer clamping plate 8; fuse 9. DETAILED DESCRIPTION

[0016] The temperature measuring assembly of the present invention is used to measure the surface temperature of the turns of an electromagnetic heating coil 2 (hereinafter referred to as coil 2 ), and has the advantages of accurate temperature measurement, simple structure and easy installation.

[0017] like Figures 1 to 4 As shown, the coil 2 of the present invention can be used in an intelligent cooking machine, which is used to provide heat for the frying pan in the intelligent cooking machine. The coil 2 is installed on a carrier tube 1 with a cylindrical outer contour. The coil 2 is installed on the outer peripheral wall of the carrier tube 1 through several groups of supporting components. All of the supporting components are arranged on the outer wall of the carrier tube 1 and are evenly distributed along the circumference of the carrier tube 1. One group of supporting components includes a vertical bracket 3 and an outer cover 5.

[0018] The vertical bracket 3 is used to position the coil 2. The vertical bracket 3 is arc-shaped and fits on the outer wall of the carrier tube 1 and is fixed to the carrier tube 1. A plurality of vertical brackets are provided on the outer side of the vertical bracket 3 and extend outwards (with a spacing of 1 / 4" and 1 / 2"). Figure 1The paper surface is the reference direction, the axial direction close to the carrier tube 1 is the inner direction, and the direction away from the axis is the outer direction, the same below). The coil 2 is wound on the outer peripheral wall of the carrier tube 1 in a manner of being clamped between two upper and lower adjacent straps 31; a notch is provided at the outer end of each strap 31, and an arc-shaped magnetic strip 4 is adapted to be clamped in the notch. The magnetic strip 4 can press the coil 2 between the outer side wall of the vertical bracket 3 and the magnetic strip 4 to stably mount the coil 2 on the strap 31; the outer cover 5 is used to fix the magnetic strip 4. The outer cover 5 is in the shape of an arc-shaped plate and is provided with a strip groove opening inward. The outer cover 5 accommodates the magnetic strip 4 in its strip groove and is locked and fixed with the corresponding vertical bracket 3, so that the magnetic strip 4 is stably pressed and fixed in the notch.

[0019] The temperature measuring assembly includes a temperature sensor 7 and a fixture, which is preferably arranged in the middle area of ​​the carrier tube 1. Multiple groups of temperature measuring assemblies installed in different areas can be set on the entire coil 2.

[0020] The temperature sensor 7 plays the role of over-temperature protection for the coil 2. It is preferably a platinum resistance temperature sensor 7 and the probe of the temperature sensor 7 is embedded in the fixture; the fixture is detachably connected to the wire turns and fits tightly together with the wire turns. The heat on the surface of the wire turns can be quickly transferred to the probe on the temperature sensor 7, thereby realizing real-time detection of the surface temperature of the wire turns by the temperature sensor 7. Preferably, it can be set in the main control circuit: when the actual temperature value collected by the probe is higher than the set temperature threshold, or it can also be set to when the actual temperature value is close to the temperature threshold, the main control circuit cuts off the power supply circuit of the coil 2 or adjusts the output power of the power supply circuit as needed, thereby effectively preventing the coil 2 from being damaged.

[0021] The clamp is divided into an inner base 6 and an outer clamping plate 8.

[0022] 1. Inner base 6

[0023] The inner base 6 is made of a non-magnetic material with high thermal conductivity, preferably copper or aluminum.

[0024] The inner base 6 has a roughly sideways "U" shape, consisting of an integrally formed base and a "U"-shaped slot. The upper and lower portions of the base extend outward to form upper and lower side panels, respectively. The slot is a sideways, outwardly facing "U"-shaped slot enclosed by the outer side of the base, the upper and lower side panels. Wire turns can be threaded into this slot and adhere to its walls.

[0025] The inner base 6 is arranged in the area between two adjacent vertical supports 3 , and the inner surface of the inner base 6 is spaced apart from the outer wall of the carrier tube 1 to avoid direct transfer of heat from the surface of the carrier tube 1 to the inner base 6 as much as possible.

[0026] The temperature sensor 7 and the inner base 6 are installed as follows:

[0027] A hole is provided on the seat body from right to left (with Figure 2 (The paper plane is the reference direction, the direction pointing to the upper left is left, and the reverse is right, the same below) a blind hole channel 61 extending to the left end position of the base body; to prevent the probe of the temperature sensor 7 from being torn off when installing or removing it, a sleeve 71 is provided on the probe to insulate the probe. The sleeve 71 is cylindrical and has an axial cavity. The probe is enclosed in the axial cavity. The sleeve 71 and the temperature sensor 7 can be adapted to be inserted into the blind hole channel 61;

[0028] In order to fix the sleeve 71 in the blind hole channel 61, a fastening ring 63 is provided on the sleeve 71 to constrain the sleeve 71 to the positioning column 62 fixed on the base body. The specific structure of the positioning column 62 and the fastening ring 63 is as follows:

[0029] 1) Positioning column 62

[0030] The positioning post 62 is disposed beside the blind hole channel 61 and has an L-shaped cross-section. The positioning post 62 is composed of an integrally formed column and a baffle. One end of the column is fixed to the right side wall of the base, and the other end extends to the right. The baffle is connected to the other end of the column and extends inward.

[0031] 2) Fastening ring 63

[0032] The fastening ring 63 has elastic properties and can be made of copper or aluminum. The outer contour of the fastening ring 63 is a rectangle, which consists of four sides connected to each other to form a hollow sleeve cavity, and a sleeve opening is opened in the middle of one of the sides.

[0033] When the sleeve 71 carrying the temperature sensor 7 is installed in the blind hole channel 61, the inner end of the sleeve 71 (i.e., the left end of the sleeve 71) is embedded in the blind hole channel 61, and its right end is exposed outside the blind hole channel 61. Then, the sleeve 71 and the column are passed through the sleeve opening in sequence to tightly fit the sleeve 71 and the column in the hollow sleeve cavity, so that the sleeve 71 is stably fixed in the blind hole channel 61, and the baffle can prevent the fastening ring 63 from slipping off the column.

[0034] The signal line of the temperature sensor 7 is led out along the outer wall of the carrier tube 1 and is electrically connected to an external main control circuit.

[0035] 2. External splint 8

[0036] The outer clamping plate 8 is arranged on the outside of the wire turn, and is used to be fixed to the inner base 6 to clamp the wire turn between the outer clamping plate 8 and the inner base 6 (that is, clamp the wire turn in the slot), so that the wire turn always remains in close contact with the slot wall.

[0037] The outer clamping plate 8 is made of a non-magnetic material with high thermal conductivity, preferably copper or aluminum.

[0038] The vertical cross-section of the outer splint 8 is "L"-shaped, and it consists of an integrally formed vertical plate and horizontal plate. The horizontal plate faces inward and is placed under the lower side plate of the inner base 6 to support the inner base 6; the vertical plate is opposite to the notch, and a lock hole is provided on the vertical plate above the area opposite to the notch. The screw passes through the lock hole and is locked on the upper end of the inner base 6, thereby fixing the outer splint 8 and the inner base 6 together.

[0039] In order to improve safety and avoid the situation where the actual surface temperature of the wire turns exceeds the temperature threshold in the event of a failure of the temperature sensor 7, causing the coil 2 to be damaged or even melted and unable to work properly, a fuse 9 is also installed on the outer surface of the outer clamping plate 8. To facilitate the installation of the fuse 9, the left end of the vertical plate of the outer clamping plate 8 is provided with an arched side plate protruding to the left, and the arched side plate is provided with mounting holes. The fuse 9 is riveted together with the arched side plate through hollow rivets. Alternatively, a hole can be opened at the left end of the fuse 9 and a corresponding rivet hole can be opened on the vertical plate of the outer clamping plate 8, and the two are installed together through hollow rivets. A long strip extending outward is provided on the right side of the vertical plate. When installing the fuse 9, the right end of the fuse 9 can be abutted against the left side wall of the long strip to position the fuse 9, thereby improving the installation convenience of the fuse 9.

[0040] The fuse 9 obtains the temperature of the wire turn surface by detecting the heat conducted from the wire turn surface to the outer clamping plate 8, and its wire is led out along the outer wall of the carrier tube 1 to be electrically connected to the main control circuit.

[0041] When the temperature detected by fuse 9 exceeds a set limit, fuse 9 is triggered and disconnects the power supply circuit of coil 2. This set limit is preferably higher than the temperature threshold to avoid frequent triggering of fuse 9 and the need to replace it, thereby reducing the number of fuse 9 replacements and saving costs.

Claims

1. A temperature measuring component for measuring the surface temperature of an electromagnetic heating coil, comprising a temperature sensor, characterized in that: It also includes a fixture that is tightly attached to the electromagnetic heating coil. The probe of the temperature sensor obtains the surface temperature of the turns of the electromagnetic heating coil by detecting the heat conducted by the fixture.

2. The temperature measuring component for measuring the surface temperature of the electromagnetic heating coil according to claim 1, characterized in that: The clamp is divided into an inner base and an outer clamping plate, the wire turns are clamped between the inner base and the outer clamping plate, a blind hole channel is provided on the inner side of the inner base, and the probe of the temperature sensor is inserted into the blind hole channel.

3. The temperature measuring component for measuring the surface temperature of the electromagnetic heating coil according to claim 2, characterized in that: A sleeve is provided on the probe of the temperature sensor to prevent the probe from being torn off, and the inner end of the sleeve is embedded in the blind hole channel.

4. The temperature measuring component for measuring the surface temperature of the electromagnetic heating coil according to claim 3, characterized in that: A positioning column is provided beside the blind hole channel, and a fastening ring is provided on the sleeve, which can fix the inner end of the sleeve in the blind hole channel.

5. The temperature measuring component for measuring the surface temperature of the electromagnetic heating coil according to claim 4, characterized in that: The cross-section of the outer splint is L-shaped, and a lock hole is provided on the outer splint for fixing the outer splint and the inner base together by screws.

6. The temperature measuring component for measuring the surface temperature of the electromagnetic heating coil according to claim 5, characterized in that: A fuse is fixedly connected to the outer side of the outer clamping plate and is used to disconnect the power supply circuit of the electromagnetic heating coil when the surface temperature of the wire turn exceeds a limit setting value.

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