Heating bowl for food preparation appliance
The heating bowl design with a tubular element extending 330° to 370° around the rotary drive addresses non-uniform heating, ensuring uniform heat distribution and simplified control, enhancing usability and cost-effectiveness.
Patent Information
- Application Number
- FR2023011942
- Authority / Receiving Office
- FR · FR
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2023-11-02
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2033-11-02
AI Technical Summary
Existing heating bowls for food preparation appliances suffer from non-uniform heating due to tubular heating elements that do not completely surround the rotary drive, resulting in hot and cold zones, and require complex temperature control devices.
A tubular heating element extending around the rotary drive at an angle between 330° and 370°, preferably 350° to 370°, with cold ends positioned to allow for nearly complete circumferential heating, accompanied by a thermal fuse and temperature sensor for uniform heating control.
Achieves nearly homogeneous heat distribution across the heating base, simplifying temperature control and reducing the need for multiple sensors, while maintaining economical construction.
Smart Images
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Abstract
Description
Title of the invention: Heating bowl for food preparation appliance technical field
[0001] The present invention relates to the field of food preparation appliances comprising a working tool driven in rotation in a heated bowl.
[0002] The present invention relates more particularly to the heating bowl. State of the art
[0003] It is known to construct a heating bowl comprising a heating base and a side wall rising from the heating base, in which the heating base is traversed by a rotary drive and in which a tubular heating element is arranged around the rotary drive under the heating base. However, the tubular heating element does not completely surround the rotary drive, so that the heating base has a hot zone under the heating parts of the tubular heating element, and a cold zone at the ends of the tubular heating element. As a result, the heating of the heating base is not uniform.
[0004] Document CN103565305A discloses a heating bowl of the aforementioned type in which the tubular heating element surrounds the rotary drive. One end of the tubular heating element, as well as most of the tubular heating element, extends along the periphery of the heating base. A second end of the tubular heating element extends from the periphery of the heating base to extend between the first end of the tubular heating element and the rotary drive, beyond the first end, so that the tubular heating element extends over 360° around the rotary drive. However, due to the presence of a cold portion at each end of the tubular heating element, the heating portion of the tubular heating element does not completely surround the rotary drive, and the heating base has a cold zone at the ends of the tubular heating element.Between the heating element of the tubular heating element and the rotary drive are a thermal fuse, a thermostat, a temperature sensor, and an electrical connector configured to power the tubular heating element. This heating base therefore uses a rather sophisticated temperature control device. However, this heating base does not provide uniform heating across the bottom of the heating bowl.
[0005] Document CN205286122U discloses a heating bowl of the aforementioned type in which the tubular heating element surrounds the rotary drive. More specifically, the tubular heating element is wound around the rotary drive. A first One end of the tubular heating element, along with one half of the tubular heating element, extends along the periphery of the heating base. The second half of the tubular heating element extends away from the periphery of the heating base, between the first end of the tubular heating element and the rotary drive, and wraps around the rotary drive. Thus, due to the presence of a cold section at each end of the tubular heating element, the tubular heating element has two heating portions on one half of the circumference of the heating base, but only one heating portion on the other half. Consequently, the heating of the heating base is not uniform. A thermal conduction plate is attached to the tubular heating element in the area with two adjacent heating portions.This heat conduction plate houses a fuse and a thermostat. The thermostat is located in half of the heating base, which has two heating sections. However, the fuse is very close to one end of the tubular heating element. This heating base also does not provide even heating of the bottom of the heating bowl. Summary of the invention
[0006] The present invention aims to remedy this drawback.
[0007] The technical problem underlying the invention consists of improving the heating homogeneity of a heating bowl of a food preparation appliance, using a heating device that is simple and economical to make.
[0008] To this end, the invention relates to a heated bowl for a food preparation appliance, comprising a heated base and a side wall rising from the heated base, the heated base being traversed by a rotating driver, a tubular heating element being arranged under the heated base, the tubular heating element extending around the rotating driver, the tubular heating element having a heating part extended by a first cold end and a second cold end, due to the fact that the heating part extends around the rotating driver at an angle between 330° and 370°, preferably at an angle between 340° and 370°, preferably at an angle between 350° and 370°.
[0009] The heating part can advantageously extend around the rotary driver at an angle between 355° and 365°, preferably at an angle between 357° and 363°, preferably at an angle between 359° and 361°.
[0010] The first cold end can be arranged at the periphery of the heating base.
[0011] The second cold end can be arranged between the heating part and the rotary drive.
[0012] The heating bowl may include an electrical connector connected to the terminals of the tubular heating element.
[0013] The electrical connector can be arranged above the first cold end and the second cold end.
[0014] The heating bowl may include a thermal fuse disposed in the half of the heating base opposite the first cold end and the second cold end.
[0015] The thermal fuse can be disposed in the central third of the heating part.
[0016] The heating bowl may include a temperature sensor disposed in the half of the heating base opposite the first cold end and the second cold end.
[0017] The temperature sensor can be disposed in the central third of the heating part.
[0018] The invention also relates to a food preparation device comprising a motorized base receiving a removable heating bowl, conforming to at least one of the aforementioned characteristics. Brief description of the figures
[0019] The objects, aspects and advantages of the present invention will be better understood from the following description of a particular embodiment of the invention presented by way of non-limiting example, with reference to the accompanying drawings in which:
[0020] Fig. 1 is a cross-sectional side view of an example embodiment of a bowl heating according to the invention;
[0021] Fig. 2 is a top perspective view of the heating bowl illustrated in Fig. 1
[0022] Fig. 3 is a perspective view from below of the heating bowl illustrated in the figures 1 and 2, in which a hood and a connector visible on [Fig.1] are not shown;
[0023] Fig. 4 is a perspective view from below of the heating bowl illustrated in the figures 1 to 3, in which the connector visible on [Fig.1] is shown, but not the hood visible on [Fig.1];
[0024] Figure 5 is a perspective view of a food preparation device including the heating bowl illustrated in figures 1 to 4.
[0025] Only the elements necessary for understanding the invention have been shown. To facilitate reading the drawings, the same elements bear the same reference numerals from one figure to another.
[0026] Figures 1 to 4 illustrate an example of the embodiment of a heating bowl 1 for a food preparation appliance.
[0027] As shown in Figures 1 and 2, the heating bowl 1 has a base heating element 2 and a side wall 3 rising from the heating element 2. The side wall 3 can be closed by a cover 8, visible in [Fig. 5]. As seen in Figures 1 and 2, the heating element 2 is traversed by a rotating drive 4. The rotary drive 4 can accommodate a removable rotary working tool 7, visible in [Fig. 5]. Alternatively, the rotary working tool can be fixed to the rotary drive 4. A tubular heating element 5 is arranged under the heating base 2. A cover 6 is fixed under the heating base 2. The cover 6 provides a passage for the rotary drive 4. The cover houses the tubular heating element 5.
[0028] As seen in Figures 1 and 2, the heating base 2 is flat around the rotary driver 4. The tubular heating element 5 extends under a flat part of the heating base 2. The heating base 2 has a heat diffusion plate carrying the tubular heating element 5 around the rotary driver 4. The tubular heating element 5 has a heating part 10 extended by a first cold end 11 and by a second cold end 12.
[0029] As can be seen more clearly in Figures 3 and 4, the tubular heating element 5 extends around the rotary driver 4. The tubular heating element 5 has a heating portion 10 extended by a first cold end 11 and by a second cold end 12.
[0030] For improved heating uniformity of the heating base 2, the heating element 10 extends around the rotary drive 4 at an angle between 330° and 370°, preferably between 340° and 370°, and most preferably between 350° and 370°. Advantageously, the heating element 10 extends around the rotary drive 4 at an angle between 355° and 365°, preferably between 357° and 363°, and most preferably between 359° and 361°. The heating element 10 and the cold ends (the first cold end 11 and the second cold end 12) can be defined, in particular, by using a temperature probe placed in contact with the tubular heating element 5.
[0031] The first cold end 11 is arranged around the periphery of the heating base 2. The first cold end 11 is extended by the heating portion 10. Most of the heating portion 10 is also arranged around the periphery of the heating base 2. The remaining portion of the heating portion 10 is inserted between the first cold end 11 and the rotary drive 4. The second cold end 12 is arranged between the heating portion 10 and the rotary drive 4.
[0032] As shown in [Fig. 4], the heating bowl 1 has an electrical connector 20 connected to the terminals 21, 22 of the tubular heating element 5. One of the terminals 21, 22 is from the first cold end 11 and the other terminal is from the second cold end 12. Each of the terminals 21, 22 is connected to one of the pins of the electrical connector 20.
[0033] As seen in [Fig. 4], the heating bowl 1 has a thermal fuse 30. The thermal fuse 30 is connected to another of the pins of the electrical connector 20. More specifically, the thermal fuse 30 is located in the half of the heating base 2 opposite the first cold end 11 and the second cold end 12. The thermal fuse 30 is located in the middle third of the heating part 10.
[0034] As seen in [Fig. 4], the heating bowl 1 has a temperature sensor 40. The temperature sensor 40 is connected to yet another of the pins of the electrical connector 20. More specifically, the temperature sensor 40 is located in the half of the heating base 2 opposite the first cold end 11 and the second cold end 12. The temperature sensor 40 is located in the middle third of the heating part 10.
[0035] More specifically, the electrical connector 20 is arranged above the first cold end 11 and the second cold end 12.
[0036] Figure 5 illustrates a food preparation apparatus comprising a motorized base 9 configured to receive the heating bowl 1, a rotary working tool 7 intended to be mounted on the rotary drive 4, and a lid 8 intended to close the heating bowl 1. The electrical connector 20 is intended to supply power to the tubular heating element 5 when the heating bowl 1 is placed on the motorized base 9. The electrical connector 20 is intended to connect the temperature sensor 40 to a thermal control device arranged in the motorized base 9.
[0037] The heating bowl illustrated in the figures operates and is used as follows: the heating element 10, forming an open loop surrounding the rotary drive 4 over almost its entire circumference, or even slightly more, provides a nearly homogeneous heat distribution for the heating base 2, using the tubular heating element 5. Since the heating base 2 has no cold zone, its heating and cooling are more homogeneous, allowing the use of a temperature control device requiring only a single temperature sensor. A heating bowl that is economical in construction and easy to use can thus be obtained.
[0038] Of course, the invention is in no way limited to the embodiment described and illustrated, which has been given only by way of example. Modifications remain possible, particularly with regard to the composition of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.
Claims
Demands
1. Heating bowl (1) for food preparation equipment, comprising a heating base (2) and a side wall (3) rising from the heating base (2), the heating base (2) being traversed by a rotating driver (4), a tubular heating element (5) being arranged under the heating base (2), the tubular heating element (5) extending around the rotating driver (4), the tubular heating element (5) having a heating portion (10) extended by a first cold end (11) and by a second cold end (12), characterized in that the heating portion (10) extends around the rotating driver (4) at an angle between 330° and 370°, preferably at an angle between 340° and 370°, preferably at an angle between 350° and 370°.
2. Heating bowl (1) for food preparation appliance according to claim 1, characterized in that the heating part (10) extends around the rotating drive (4) at an angle between 355° and 365°, preferably at an angle between 357° and 363°, preferably at an angle between 359° and 361°.
3. Heating bowl (1) for food preparation appliance according to one of claims 1 or 2, characterized in that the first cold end (11) is arranged on the periphery of the heating base (2).
4. Heating bowl (1) for food preparation appliance according to any one of claims 1 to 3, characterized in that the second cold end (12) is arranged between the heating part (10) and the rotary drive (4).
5. Heating bowl (1) for food preparation appliance according to any one of claims 1 to 4, characterized in that it comprises an electrical connector (20) connected to the terminals (21, 22) of the tubular heating element (5).
6. Heating bowl (1) for food preparation appliance according to claim 5, characterized in that the electrical connector (20) is disposed above the first cold end (11) and the second cold end (12).
7. Heating bowl (1) for food preparation appliance according to any one of claims 1 to 6, characterized in that it comprises a thermal fuse (30) disposed in the half of the heating base (2) opposite the first cold end (11) and the second cold end (12).
8. Heating bowl (1) for food preparation appliance according to claim indication 7, characterized in that the thermal fuse (30) is disposed in the central third of the heating part (10).
9. Heating bowl (1) for food preparation appliance according to any one of claims 1 to 8, characterized in that it comprises a temperature sensor (40) disposed in the half of the heating base (2) opposite the first cold end (11) and the second cold end (12).
10. Heating bowl (1) for food preparation appliance according to claim 9, characterized in that the temperature sensor (40) is disposed in the central third of the heating part (10).
11. Food preparation apparatus comprising a motorized base (9) receiving a removable heating bowl (1), characterized in that the heating bowl (1) conforms to any one of claims 1 to 10.