WO2008026442A1

WO2008026442A1 - Induction-heating cooker

Info

Publication number: WO2008026442A1
Application number: PCT/JP2007/065739
Authority: WO
Inventors: Takaaki Kusaka; Kazuichi Okada; Atsushi Sakamoto
Original assignee: Panasonic Corporation
Priority date: 2006-09-01
Filing date: 2007-08-10
Publication date: 2008-03-06
Also published as: JP4783243B2; JP2008059982A

Abstract

One of heating coils (18, 20, 22) is disposed at a rear position in the interior of the body (2) of an induction-heating cooker. A coil base (28), on which the heating coil (22) is placed is, is provided with an extension part (28a) extending toward the upper side of a fan cover (44). A ventilation passage (68) is formed in the extension part (28a), and the air discharged from a suction fan (40) is fed toward the heating coil (22) through the ventilation passage (68) to cool the heating coil (22).

Description

Specification

Induction heating cooker

Technical field

[0001] The present invention relates to an induction heating cooker used by being incorporated in a system kitchen or the like.

Background art

[0002] Conventionally, there is a type of heating cooker of this type in which an intake-exhaust fan and an exhaust-only fan are provided in a main body integrated with a top plate and a casing to forcibly form an intake / exhaust path. . In such a heating cooker, even if the pressure loss inside the device is large, the air taken in from the intake port is surely exhausted from the exhaust port, so that the device is efficiently cooled (for example, patent literature). See 1.)

[0003] In addition, a plurality of (for example, two) heating coils constituting the induction heating means are provided in the front part of the main body, and a radial heater which is an electric resistance heating type heating means is provided behind the heating coil. The air taken in from the dedicated intake fan cools the control board equipped with electronic components, and the operation part provided on the front of the heating cooker or the heating part such as a heating cabinet or heating coil. After cooling, it is discharged to the outside by an exhaust fan (for example, see Patent Document 2).

[0004] Patent Document 1: Japanese Patent Laid-Open No. 11 354264

Patent Document 2: JP 2004-288650 A

Disclosure of the invention

Problems to be solved by the invention

[0005] Recently, there has also been proposed a power heater provided with a third heating coinole instead of the radial heater provided behind the heating coil, whereas the radial heater does not need to be cooled. Therefore, if the same intake / exhaust path is adopted for a three-neck induction heating cooker with a third heating coil as a heating cooker with a radial heater behind the heating coil, A sufficient amount of cooling air cannot be secured in the third heating coil! [0006] The present invention has been made in view of such problems of the prior art, and even when a heating coil is provided at the rear of the main body, a sufficient amount of cooling air for the heating coil can be ensured. For the purpose of providing induction cookers!

Means for solving the problem

In order to achieve the above object, the present invention provides a main body, a top plate covering the upper surface of the main body, a plurality of heating coils provided below the top plate, and each of the plurality of heating coils. A coil base to be mounted, a roaster having an opening on the front surface of the main body, a roaster cover covering the roaster, and an intake fan for taking outside air from an intake port formed behind the top plate An induction heating cooker provided, wherein one of the plurality of heating coils is disposed behind the main body, and the coil base on which the rear heating coil is placed covers a fan cover. An extension part extending upward, and a ventilation path is formed in the extension part, and the air discharged from the intake fan passes through the ventilation path and the rear heating coil Direction force, characterized in that the flow connexion.

[0008] According to another aspect of the present invention, there is provided a main body, a top plate covering an upper surface of the main body, a plurality of heating coils provided below the top plate, and each of the plurality of heating coils. A coil base to be placed, a roaster having an opening on the front surface of the main body, a roaster cover that covers the roaster, and an intake fan for taking outside air from an intake port formed behind the top plate An induction heating cooker provided, wherein one of the plurality of heating coils is disposed rearward of the main body, and the coil base on which the rear heating coiler is placed is located above a fan cover that covers the intake fan. An extension portion extending toward the bottom, and the air discharged from the intake fan and striking the extension portion under the coil base on which the rear heating coil is placed. And it said that there was'm flows toward Unishi to.

[0009] It is preferable that the coil base on which the rear heating coil is mounted is supported by a part of the fan cover.

[0010] In addition, one of a plurality of support members that support the coil base on which the rear heating coil is placed is provided on the fan cover, and the remaining support members are provided on the roaster cover. You may make it.

[0011] Further, of the tangent lines of the outer peripheral portion of the rear heating coil, the remaining tangent lines outside the two tangent lines parallel to the line connecting the approximate center of the ventilation path and the center of the rear heating coil. It is preferable to place a support member.

[0012] In addition, the support member provided on the fan cover may be disposed in the vicinity of the upper portion of the side wall of the intake fan case forming the outer shell of the intake fan.

[0013] The coil base on which the rear heating coil is placed has two coil holders extending substantially in parallel to hold the heating coil, and the coil holder is substantially at the center of the ventilation path. It extends substantially parallel to a line connecting the centers of the rear heating coils.

[0014] Further, the coil base on which the rear heating coil is mounted has a magnetic shield ring arranged outside the heating coil, and the ventilation path is formed outside the magnetic shield ring.

[0015] The coil base on which the rear heating coil is mounted has a locking portion and a screwing portion for holding the magnetic shield ring.

[0016] In this case, it is preferable that the screwing portion is provided on the windward side of the locking portion.

[0017] In addition, an auxiliary fan may be provided in the vicinity of the fan cover so that air from the auxiliary fan flows toward the extension portion.

[0018] An auxiliary fan case may be formed on the fan cover, and the auxiliary fan may be accommodated in the auxiliary fan case.

[0019] In this case, the auxiliary fan case is a lower case, and an upper case is attached to the lower case, and an air suction port is formed in the lower case, while an air discharge port is formed in the upper case. Preferably formed.

The invention's effect

[0020] According to the present invention, when the extending portion extending upward of the fan cover is provided on the coil base on which the rear heating coil is placed and the ventilation path is formed in the extending portion, Since the discharged air flows through the ventilation path toward the rear heating coil, the rear heating coil can be sufficiently cooled.

[0021] Further, when the ventilation path is not formed in the above-described extension part, the air discharged from the intake fan and hitting the extension part is directed downward below the coil base on which the rear heating coil is placed. Therefore, the entire coil base including the flow heating coil can be cooled from below.

[0022] Further, since the coil base on which the rear heating coil is placed is supported by a part of the fan cover, the support portion of the fan cover does not hinder the wind that cools the rear heating coil.

[0023] If one of the plurality of support members that support the coil base on which the rear heating coil is placed is provided on the fan cover and the remaining support members are provided on the roaster cover, the rear heating coil is balanced. It can be supported and a desired ventilation path can be secured.

[0024] Further, among the tangent lines of the outer peripheral portion of the rear heating coil, the roaster is formed outside the two tangent lines parallel to the line connecting the approximate center of the ventilation path formed in the extending portion and the center of the heating coil. When the support member provided on the cover is arranged, the entire coin can be efficiently cooled without the support member hindering the cooling air.

[0025] Further, since the support member provided on the fan cover is disposed in the vicinity of the projecting portion, the strength of the support member can be sufficiently ensured.

[0026] Further, since the two coil holders extending substantially in parallel for holding the rear heating coil are extended substantially in parallel to a line connecting the approximate center of the ventilation path and the center of the heating coil, the coil holder is The wind can be efficiently sent to the coil surface that does not obstruct the cooling air.

[0027] Further, since the magnetic shield ring is arranged outside the rear heating coil and the ventilation path is formed outside the magnetic shield ring, the magnetic shield ring can be efficiently cooled.

[0028] Further, since a locking portion for holding the magnetic shield ring is provided on the coil base on which the rear heating coil is placed, the magnetic shield ring partially screwed to the coil base or the thermal expansion of the coil base is caused. The magnetic shield ring can be securely fixed while preventing deformation. Furthermore, even if the magnetic shield ring is warped, a predetermined flatness of the magnetic shield ring can be ensured by holding the magnetic shield ring with screws and locking portions.

[0029] Further, since the screwing portion is provided on the windward side from the locking portion, it is possible to reliably cool the screw used for screwing S and to prevent the screw from loosening.

[0030] If an auxiliary fan is provided in the vicinity of the fan cover so that air from the auxiliary fan flows toward the ventilation path, the rear heating coil can be cooled more reliably. Brief Description of Drawings

[0031] FIG. 1 is an exploded perspective view of an induction heating cooker according to the present invention.

[Figure 2] Longitudinal section of the induction heating cooker of Figure 1

[Figure 3] Top view of the induction heating cooker of Figure 1 with the top plate removed

FIG. 4 is an exploded perspective view of the third heating coil, fan cover, and intake fan case provided in the induction heating cooker of FIG.

[Fig. 5] Perspective view of the auxiliary fan case shown in Fig. 4 when viewed with downward force

[Fig. 6] Front view of the third heating coil, fan cover, and intake fan case of Fig. 4.

[Fig.7] Top view of third heating coil

[Figure 8] Plan view of the third heating coil showing the flow of cooling air

Explanation of symbols

[0032] 2 cooker body, 2a side wall, 2b front wall, 4 top plate,

6 Plate frame, 8, 10, 12 Heating section, 14 Inlet, 16 Exhaust,

18, 20, 22 Karo fever: πinore, 24, 26, 28: πinore base,

28a extension part, 28b locking part, 28c abutment part, 28d anti-vibration cap,

30 roaster, 32 roaster cover, 33 spring,

34, 36, 38 Control board, 35 Control unit, 38a Upper control board,

38b Lower control board, 40, 42 Air intake fan, 43 Heat sink,

44 Fan cover, 44a Air intake, 46 Air intake fan case,

48 Support members, 50 springs, 52, 54 Support members, 56 springs,

58 Auxiliary fan case, 60 lower case, 60a inlet,

62 Auxiliary fan, 64 Upper case, 64a outlet, 66 Magnetic shield,

68 Ventilation path, 70 Coil holder.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0034] Figs. 1 to 3 show an induction heating cooker according to the present invention, and the cooker body 2 is assembled by dropping from above into an opening provided on the top surface of the kitchen cabinet. The upper surface of body 2 is surrounded by a plate frame 6 around the top plate 4 made of crystallized ceramic. Covered. A plurality of (three in the present embodiment) heating units 8, 10, and 12 are displayed on the top plate 4 by printing. Behind the top plate 4, the rear part of the main body 2 is formed with an intake port 14 for taking outside air into the main body 2 and an exhaust port 16 for discharging the heated air inside the main body 2 to the outside. Has been.

[0035] Inside the main body 2 corresponding to the heating units 8, 10 and 12, the first and second calorie heat coins 18 and 20 constituting the induction heating means are disposed forward, and these two heating coils 18 The third heating coil 22 is disposed behind the twentieth 20. The three heating coils 18, 20, and 22 are mounted on the coil bases 24, 26, and 28, respectively.

[0036] Below the first heating coil (the heating coil on the left side in FIG. 1) 18, a roaster 30 having an opening on the front surface of the main body is formed as shown by a broken line as a heating chamber for heating fish and the like. A roaster cover 32 as a partition plate that shields heat from the roaster 30 is interposed between the first heating coil 18 and the roaster 30. In addition, a clearance for heat insulation is provided on the upper surfaces of the roaster cover 32 and the roaster 30.

[0037] On the roaster cover 32, a plurality of (for example, three) support members (not shown) for supporting the coil base 24 on which the first heating coil 18 is placed are formed in a body. The first heating coil 18 is pressed against the back surface (lower surface) of the top plate ⁴ by the spring 33 attached to the support member.

[0038] In addition, on the front surface of the main body on the side of the roaster 30, an operation unit 35 is provided that is operated when adjusting using an induction heating cooker. Further, on the side of the roaster 30 and below the second heating coil 20, there are three control boards 34, 36 provided with electronic parts for controlling the first to third heating coils 18, 20, 22. , 38 are stacked one above the other, and behind them, a plurality of (for example, two) centrifugal intake fans 40, 42 for sucking air outside the body 2 are arranged above and below. ! /

[0039] The three control boards 34, 36, 38 are cooled by the air discharged from the intake fans 40, 42. In the present embodiment, the configuration of the intake fans 40, 42 indicates that they are indicated by broken line arrows in FIG. As shown, the upper and lower control boards 34 and 36 are supplied with more cooling air than the intermediate control board 38. Moreover, since the output of the 3rd heating coil 22 arrange | positioned back among the three heating coils 18, 20, and 22 is the smallest, it is the control group which controls the 3rd heating coil 22. Plate 38 is placed in the middle layer.

[0040] However, because the cooling air volume of the intermediate layer is small, the intermediate layer is configured in a two-step shape with a step, and the first circuit component such as a switching element or a diode bridge (power module). Is placed on the upper stage 38a, and a second circuit component such as a capacitor is placed on the lower stage 38b to improve the cooling efficiency. Further, on the first circuit component placed on the upper stage 38a, a heat sink 43 for improving the heat transfer coefficient is fixed as a heat dissipation means. A plurality of cooling fins extending in the direction are formed.

[0041] Also, a board and a fan cover (hereinafter referred to as fan cover) integrally formed to cover the control boards 34, 36, 38 and the intake fans 40, 42, 44 forces, almost the same height as the roaster cover 32 Is surrounded by the intake fan case 46 that forms the outer shell of the intake fans 40, 42, the rotor 30, the side wall portion of the main body outer shell (right side wall portion in FIG. 1) 2a, and the front wall portion 2b of the main body outer shell. It is arranged so as to partition the upper part of the space.

FIGS. 4 to 6 show a fan cover 44 and an intake fan case 46, and the fan cover 44 has a substrate for supporting a coil base 26 on which the second heating coil 20 is placed. A number of (for example, three) support members 48 are formed in a body, and the second heating coil 20 is pressed against the back surface (lower surface) of the top plate 4 by a spring 50 attached to the support member 48. It is pressed.

[0043] In addition, the fan cover 44 located above the intake fan 40 is formed with an intake portion 44a projecting upward so that the external air taken in from the intake port 14 is formed. Is sucked into the intake fans 40, 42 from the intake portion 44a. Further, on the third heating coil 22 side of the fan cover 44, one of a plurality of (for example, three) support members 52 for supporting the coil base 28 on which the third heating coil 22 is mounted is a fan 52. It is integrally formed on the cover 44 so as to be close to the upper side of the side wall (vertical wall) of the intake fan case 46.

Furthermore, as shown in FIG. 7, two support members 54 for supporting the coil base 28 are formed on the roaster cover 32 below the third heating coil 22 in a body-like manner. The coil base 28 of the third heating coil 22 is provided at the abutting portion 28c and above by the two supporting members 54 and the spring 56 attached to the one supporting member 52 described above. It is pressed against the back surface (bottom surface) of the top plate 4 through the anti-vibration cap 28d.

Further, as shown in FIGS. 4 to 6, a lower case 60, which is a part of the auxiliary fan case 58, is formed on the third heating coil 22 side of the intake fan case 46 in a body-like manner. An auxiliary fan 62 is accommodated in the lower case 60, and an upper case 64, which is another part of the auxiliary fan case 58, is screwed to the lower case 60. The lower case 60 is formed with a suction port 60a through which air discharged from the intake fan 40 is sucked, and the upper case 64 is formed with a discharge port 64a through which air discharged from the auxiliary fan 62 is discharged. Is formed

As shown in FIG. 4 and FIG. 7, an annular magnetic shield ring 66 is placed on the coil base 28 outside the third heating coil 22, and the coil base outside the magnetic shield ring 66 is arranged. The slot 28 is integrally formed with a substantially triangular extension 28 a that extends upward from the fan cover 44. The extended portion 28a is supported by the above-described support member 52 formed on the fan cover 44, and a ventilation path 68 for sending cooling air to the third heating coil 22 is provided in the vertical direction of the extended portion 28a. Is formed. Note that the above-described magnetic shield ring is similarly placed on the coil base 24 outside the first heating coil 18 and the coil base 26 outside the second heating coil 20.

[0047] Further, the coil base 28 located on the substantially opposite side of the extending portion 28a has a locking portion 28b having a substantially inverted L-shaped vertical section for holding the magnetic shield ring 66 in a body-like manner. The magnetic shield 66, which is formed and partially locked to the locking portion 28b, is screwed to the coil base 28 at the other two points. This method of attaching the magnetic shield ring 66 is to prevent the coil base 28 or the magnetic shield ring 66 from being deformed by thermal expansion and to ensure that the magnetic shield ring 66 is fixed. A stop may be provided, and at least one force point of the magnetic shield ring 66 may be screwed to the coil base 28. Note that the screws used for screwing may loosen when exposed to high temperatures, and if loosened, it may cause noise. The locking portion 28b is preferably provided on the leeward side.

[0048] Further, two coil holders 70 extending in substantially parallel are screwed to the coil base 28, and the third calorie heat coin 22 is sandwiched between the coil base 28 and the two coil holders 70. And is held by the coil base 28. Further, as shown in FIG. 8, the direction in which the coin rehonorada 70 extends substantially coincides with the direction in which the cooling air that has passed through the ventilation path 68 formed in the extending portion 28 a of the coil base 28 flows.

[0049] In addition, the two support members 54 formed on the roaster cover 32 are arranged at positions where the entire third heating coil 22 can be efficiently cooled without obstructing the flow of the cooling air that has passed through the ventilation path 68. Has been. That is, of the tangent lines of the outer peripheral portion of the third heating coil 22, two tangent lines LI and L2 parallel to the line L connecting the approximate center C of the ventilation path 68 and the center of the third heating coil 22 Two support members 54 are located outside.

[0050] In the induction heating cooker having the above-described configuration, the flow of air particularly when cooking using the third heating coil 22 will be described below.

[0051] When a heated object such as a pan is placed on the heating unit 12 and cooking is performed using the third heating coil 22, a large current is applied to the third heating coil 22 by operating the operation unit 35. When supplied, an eddy current is generated at the bottom of the object to be heated and the object to be heated generates heat. At this time, power is also supplied to the intake fans 40 and 42, and the air taken in from the intake port 14 descends the intake fan case 46 to the intake fans 40 and 42 as shown by the dashed arrows in FIG. Inhaled. In addition, the air discharged from the intake fans 40, 42 passes over the control board 34, 36, 38 laminated in three layers, and a part of the opening 44b formed in the fan cover 44 above the control board 34. , 44c (see FIG. 4) and the second heating coil 20 and the first heating coil 18, while another part passes the operation part 35 and further passes the upper front part of the roaster 30. After each part is cooled, it is discharged from the exhaust port 16.

[0052] As described above, among the three-layer control boards 34, 36, and 38, the intermediate-layer control board 36 has a smaller amount of airflow than the upper-layer or lower-layer control boards 34 and 38. The cooling efficiency is improved by using two layers. In addition, by providing a height difference between the first circuit component placed on the upper stage 38a of the intermediate layer and the second circuit part placed on the lower stage 38b, the heat sink 43 on the first circuit part is also provided. The cooling air discharged from the intake fan 40 directly hits, and the first circuit component placed in front of the main body and placed on the upper stage 38a is also sufficiently cooled.

[0053] Further, another part of the air discharged from the intake fan 40 is an auxiliary fan case 58. The air sucked into the auxiliary fan 62 accommodated in the auxiliary fan case 58 through the suction port 60a formed in the lower case 60 and discharged from the auxiliary fan 62 was formed in the upper case 64 of the auxiliary fan case 58. It is discharged above the discharge port 64a.

[0054] Further, the air discharged upward from the auxiliary fan 62 passes through the ventilation path 68 formed in the extension portion 28a of the coil base 28 on which the third heating coil 22 is placed, and is thus magnetically shielded. After the ring 66, the third heating coil 22 and the like are cooled, they are discharged from the exhaust port 16.

In the embodiment described above, auxiliary fan 62 is attached in the vicinity of fan cover 44, but auxiliary fan 62 is not necessarily required. That is, a centrifugal intake fan is used as the intake fan 40, and a part of the air discharged from the intake fan 40 inevitably extends along the intake fan case 46 due to the centrifugal force. Since the air flows below 28a, it is possible to secure a certain amount of air for cooling the third heating coiner 22 even in the configuration in which the ventilation path 68 is simply formed in the extending portion 28a.

[0056] In addition, in the configuration in which the ventilation path 68 is not necessarily formed in the extension 28a, the air discharged from the intake fan 40 hits the extension 28a and hits the third heating core. Since it flows toward the lower side of the coil base 28 on which the coil 22 is placed, the entire coil base including the heating coil can be cooled from below.

[0057] In the above-described embodiment, the force obtained by integrally forming the substrate cover and the fan cover may be separate from each other.

Industrial applicability

[0058] As described above, since the heating cooker according to the present invention can efficiently cool the heating coil disposed at the rear, the three-neck induction in which two heating coils are provided at the front and one heating coil is provided at the rear. It is useful as a cooking device.

Claims

The scope of the claims

[1] A main body, a top plate covering an upper surface of the main body, a plurality of heating coils provided below the top plate, a coil base on which each of the plurality of heating coils is mounted, An induction heating cooker comprising a roaster having an opening on the front surface, a roaster cover that covers the roaster, and an intake loca formed at the rear of the top plate for taking in external air. And

One of the plurality of heating coils is disposed in the rear of the main body, and the coil base on which the rear heating coil is mounted includes an extending portion extending upward of a fan cover that covers the intake fan. An induction heating cooker characterized in that an air passage is formed in the extending portion so that air discharged from the intake fan flows toward the heating coil behind the air through the air passage. .

[2] A main body, a top plate covering the upper surface of the main body, a plurality of heating coils provided below the top plate, a coil base on which each of the plurality of heating coils is mounted, An induction heating cooker comprising a roaster having an opening on the front surface, a roaster cover that covers the roaster, and an intake loca formed at the rear of the top plate for taking in external air. And

One of the plurality of heating coils is disposed in the rear of the main body, and the coil base on which the rear heating coil is placed is directed upward and extends above the fan cover that covers the intake fan. Inductive heating cooking, characterized in that air discharged from the intake fan and striking against the extending portion flows downward of the coil base on which the rear heating coil is placed. vessel.

3. The induction heating cooker according to claim 1 or 2, wherein the coil base on which the rear heating coil is mounted is supported by a part of the fan cover.

4. The fan cover is provided with one of a plurality of support members that support the coil base on which the rear heating coil is placed, and the remaining support members are provided on the roaster cover. The induction heating cooker described in 1.

[5] Out of the tangent lines of the outer peripheral portion of the rear heating coil, the remaining support portions are outside the two tangent lines parallel to the line connecting the approximate center of the ventilation path and the center of the rear heating coil. 2. The induction heating cooker according to claim 1, wherein a material is arranged.

6. The induction heating cooker according to claim 4, wherein the supporting member provided on the fan cover is disposed in the vicinity of the upper side of the side wall of the intake fan case forming the outer shell of the intake fan. .

[7] The coil base on which the rear heating coil is mounted has two coil holders extending substantially in parallel to hold the heating coil, and the coil holder is substantially at the center of the ventilation path and the rear side. The induction heating cooker according to claim 1, wherein the induction heating cooker extends substantially parallel to a line connecting the centers of the heating coils.

[8] The coil base on which the rear heating coil is mounted has a magnetic shielding ring arranged outside the heating coil, and the ventilation path is formed outside the magnetic shielding ring. The induction heating cooker according to claim 1.

9. The induction heating cooker according to claim 8, wherein the coil base on which the rear heating coil is placed has a locking portion and a screwing portion for holding the magnetic shield ring.

10. The induction heating cooker according to claim 9, wherein the screwed portion is provided on the windward side of the locking portion.

[11] The induction heating cooker according to claim 1 or 2, wherein an auxiliary fan is provided in the vicinity of the fan cover, and air from the auxiliary fan flows toward the extending portion. .

12. The induction heating cooker according to claim 10, wherein an auxiliary fan case is formed on the fan cover, and the auxiliary fan is accommodated in the auxiliary fan case.

[13] The auxiliary fan case is a lower case, and an upper case is attached to the lower case, and an air suction port is formed in the lower case, while an air discharge port is formed in the upper case. The induction heating cooker according to claim 12.