Storage cabinet
By adopting a shelf structure of heating layer and bearing layer in the display cabinet, and utilizing the design of heat-conducting pipes and grid structure, the problem of uneven heating of items in the display cabinet is solved, and a more uniform and efficient heating effect is achieved.
Patent Information
- Application Number
- CN202422835725.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-20
AI Technical Summary
The heating shelves in existing display cabinets are not in uniform contact with the items, resulting in uneven heating of the items.
A layered structure including a heating layer and a bearing layer is adopted. Heat-conducting pipes are distributed on the heating layer. The heat-conducting medium circulates through the air in the hollow heat transfer cavity to heat the objects. The bearing layer is a grid structure to avoid direct contact and improve heating uniformity.
The heated air in the hollow heat transfer cavity heats the objects, thus avoiding uneven heating and improving heating uniformity and efficiency.
Smart Images
Figure CN223380326U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a storage cabinet. Background Art
[0002] Currently, heating shelves in display cabinets are generally electric heating plates, where items are placed to heat them. Therefore, the heating plates come into direct contact with the items to heat them. However, the bottoms of most items are non-planar, so the contact between the heating shelf and the items is linear or point contact, resulting in uneven heating of the items.
[0003] It should be noted that the statements in this background technology section only provide background technology related to the present invention and do not necessarily constitute prior art. Utility Model Content
[0004] The utility model provides a storage cabinet to improve the uniformity of heating items.
[0005] The utility model provides a storage cabinet, comprising:
[0006] Cabinets; and
[0007] The shelf is arranged in the cabinet, and the shelf includes a heating layer and a bearing layer. The bearing layer is used to place and bear objects, and the heating layer is used to heat objects and includes a hollow heat transfer cavity. Heat conduction pipes are distributed circumferentially in the hollow heat transfer cavity. Heat conduction medium flows in the heat conduction pipes to heat the air in the hollow heat transfer cavity, and the heated air heats the objects on the bearing layer.
[0008] In some embodiments, the heat-generating layer includes a plurality of hollow heat-transfer cavities sequentially arranged in the width direction of the cabinet.
[0009] In some embodiments, the supporting layer is disposed above the heating layer and has a grid structure.
[0010] In some embodiments, the carrier layer is made of a thermally conductive material and contacts the heat-generating layer.
[0011] In some embodiments, the carrying layer is disposed below the heat-generating layer, and the article passes through the hollow heat transfer cavity to be carried and placed on the carrying layer.
[0012] In some embodiments, the shelf includes a carrying layer and two heating layers respectively arranged on the upper and lower sides of the carrying layer. The two heating layers include a first heating layer located above the carrying layer and a second heating layer located below the carrying layer. The objects pass through the hollow heat transfer cavity of the first heating layer to be placed on the carrying layer, and the heated air in the hollow heat transfer cavity of the second heating layer passes through the carrying layer to heat the objects.
[0013] In some embodiments, the shelf includes a plurality of first pipes and a plurality of second pipes spaced apart in the width direction of the cabinet, and each second pipe is arranged between two adjacent first pipes in the plurality of first pipes so that the first pipe and the second pipe are enclosed to form a heat-conducting pipe.
[0014] In some embodiments, the first conduit and the second conduit are detachably connected.
[0015] In some embodiments, the heat exchange medium flowing in the heat-conducting pipe includes hot water or high-temperature refrigerant; or, the heat-conducting pipe includes an electric heating pipe.
[0016] In some embodiments, the shelf further includes a fan disposed within the hollow heat transfer cavity.
[0017] In some embodiments, the shelf also includes a pipe interface for introducing heat exchange medium into the heat conduction pipe, and the storage cabinet includes multiple heating interfaces spaced apart in the height direction. The multiple heating interfaces are all connected to the heating system to output the heat exchange medium, and the pipe interface can be optionally connected to multiple heating interfaces.
[0018] Based on the technical solution provided by the present invention, the storage cabinet includes a cabinet body and shelves. The shelves are arranged in the cabinet body. The shelves include a heating layer and a bearing layer. The bearing layer is used to place and bear items. The heating layer is used to heat items and includes a hollow heat transfer cavity. Heat-conducting pipes are distributed circumferentially around the hollow heat transfer cavity. A heat-conducting medium flows through the heat-conducting pipes to heat the air in the hollow heat transfer cavity. The heated air heats the items on the bearing layer. The heating layer of the shelves of the storage cabinet in the embodiment of the present invention includes a hollow heat transfer cavity, so that the items are heated by the heated air in the hollow heat transfer cavity. Compared with the solution of directly arranging an electric heating plate at the bottom of the item and in direct contact with the item, uneven heating is avoided, thereby improving the uniformity of heating the item.
[0019] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:
[0021] Figure 1 This is a schematic structural diagram of a storage cabinet in some embodiments of the present invention.
[0022] Figure 2 for Figure 1 Schematic diagram of the structure of the storage cabinet shelves shown.
[0023] Figure 3 for Figure 2 Schematic diagram of the exploded structure of the shelf shown.
[0024] Figure 4 for Figure 2 Schematic diagram of the structure of the heating layer of the shelf shown.
[0025] Figure 5 for Figure 4 A schematic diagram of the partial structural decomposition of the heating layer is shown.
[0026] Figure 6 Schematic diagram of the structure of the shelves of storage cabinets in other embodiments of the present invention.
[0027] 10. Cabinet body; 20. Shelf; 21. Heating layer; 22. Bearing layer; 221. Pipe interface; 222. First pipe; 223. Second pipe; 224. Sealing ring; 225. Screw. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0029] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.
[0030] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be subsequently positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used herein are interpreted accordingly.
[0031] refer to Figures 1 to 3 In some embodiments of the present invention, a storage cabinet includes a cabinet body 10 and a shelf 20. The shelf 20 is disposed within the cabinet body 10. The shelf 20 includes a heating layer 21 and a supporting layer 22. The supporting layer 22 is used to place and support an object A. The heating layer 21 is used to heat the object A and includes a hollow heat transfer cavity B. Heat transfer pipes are distributed around the hollow heat transfer cavity B. A heat transfer medium flows through the heat transfer pipes to heat the air within the hollow heat transfer cavity B. The heated air heats the object A on the supporting layer 22.
[0032] refer to Figure 1 and Figure 2 In some embodiments, item A comprises a beverage.
[0033] refer to Figure 2 and Figure 3 In some embodiments, the shelf 20 includes a heating layer 21 located below and a support layer 22 located above the heating layer 21. Object A is placed directly on the support layer 22. The heating layer 21 includes a hollow heat transfer cavity B. As the high-temperature heat medium flows through the circumferentially extending heat transfer conduit, the heat it emits heats the air within the central hollow heat transfer cavity B. The heated air, due to its low specific gravity, flows upward, thereby heating the object A located above.
[0034] The hollow heat transfer cavity B in the embodiment of the present invention is arranged to be continuous in the thickness direction, so that the air at the bottom of the hollow heat transfer cavity B can flow upward to form convection.
[0035] refer to Figure 6In other embodiments, the shelf 20 includes a support layer 22 located below and a heating layer 21 located above the support layer 22. This means that when an object A is placed, it must pass through the hollow heat transfer cavity B before being placed on the support layer 22. This allows the air in the hollow heat transfer cavity B of the heating layer 21 to heat the object A circumferentially, increasing the heating area and improving the heating effect.
[0036] refer to Figure 4 In a specific embodiment, the heat-generating layer 21 includes a plurality of hollow heat-transfer cavities B. However, in other embodiments not shown in the drawings, the heat-generating layer 21 may also include only one hollow heat-transfer cavity enclosed in the circumferential direction of the shelf 20 .
[0037] The heating layer 21 of the shelf 20 of the storage cabinet in the embodiment of the present invention includes a hollow heat transfer cavity B, so that the object A is heated by the heated air in the hollow heat transfer cavity B. Compared with the solution of directly setting an electric heating plate at the bottom of the object A and in direct contact with the object A, uneven heating is avoided, thereby improving the uniformity of heating the object.
[0038] In order to further improve the uniformity and efficiency of heating, refer to Figure 3 and Figure 4 In some embodiments, the heating layer 21 includes multiple hollow heat transfer cavities arranged sequentially along the width direction X of the cabinet 10. This allows the hollow heat transfer cavities to be distributed at different locations along the width direction X of the cabinet 10. This allows items placed at different locations on the shelves to be heated by the hollow heat transfer cavities, further improving heating uniformity. Furthermore, the multiple hollow heat transfer cavities increase the heat output, thereby improving heating efficiency.
[0039] refer to Figure 3 and Figure 4 Each hollow heat transfer cavity B extends in the depth direction Y of the cabinet 10, allowing each hollow heat transfer cavity B to heat items at different locations in the depth direction Y. Of course, in other embodiments not shown in the figures, smaller sub-heat transfer cavities may be provided within each hollow heat transfer cavity B to further improve heating efficiency.
[0040] To further improve heating efficiency, in some embodiments, a carrier layer 22 is disposed above the heating layer 21 and has a grid structure. The carrier layer 22 is configured as a grid structure having a plurality of densely distributed hollow holes, so that the heated air in the heating layer 21 can rise upward through the hollow holes and heat the object A.
[0041] Moreover, item A is placed directly on the carrier layer 22, that is, directly on the grid structure, which avoids direct contact between item A and the heating layer 21, specifically avoids direct contact between item A and the heat-conducting pipe, so that item A is mainly heated by the heated air, further avoiding the problem of uneven heating.
[0042] To further improve heating efficiency, in some embodiments, a carrier layer 22 is made of a thermally conductive material and is in contact with the heating layer 21. The carrier layer 22 generates heat from the heat transfer pipes of the heating layer 21 and the heated air. This allows the object A to be heated not only by the heated air within the hollow heat transfer cavity B but also by the contact heating of the carrier layer 22, thereby improving heating efficiency. Furthermore, because the carrier layer 22 is provided between the object A and the heating layer 21 for indirect heat transfer, direct contact between the heating layer 21 and the object A is avoided, thus reducing heating unevenness to a certain extent.
[0043] refer to Figure 6 In some embodiments, a carrier layer 22 is disposed below the heating layer 21. Object A passes through the hollow heat transfer cavity B and is placed on the carrier layer 22. This allows the hollow heat transfer cavity B to circumferentially surround object A and also increases the coverage area of the hollow heat transfer cavity over object A in the height direction, thereby increasing the overall heating area and improving heating efficiency.
[0044] The heating layer 21 of this embodiment primarily utilizes the heated air in the hollow heat transfer cavity B and the heat radiation from the heat transfer pipes to heat the object A. The present application does not restrict the formation or specific form of the hollow heat transfer cavity B; as long as the heat transfer pipes are distributed circumferentially to form the hollow heat transfer cavity B, it will suffice. Multiple rectangular hollow heat transfer cavities, as shown in the accompanying drawings of this invention, can be used to instantly heat the object A. Alternatively, multiple oblong hollow heat transfer cavities, or even circular hollow heat transfer cavities, not shown in the drawings, can be used.
[0045] The following describes the formation method of the hollow heat transfer cavity in a specific embodiment of the present invention. Figure 4 and Figure 5 In some embodiments, the shelf 20 includes a plurality of first pipes 222 and a plurality of second pipes 223 spaced apart in the width direction X of the cabinet 10, and each second pipe 223 is arranged between two adjacent first pipes 222 among the plurality of first pipes 222 so that the first pipe 222 and the second pipe 223 are enclosed to form a heat conduction pipe.
[0046] like Figure 4As shown, two oppositely disposed first pipes 222 and two oppositely disposed second pipes 223 enclose a rectangular hollow heat transfer cavity B. Two adjacent hollow heat transfer cavities B are disposed on either side of the first pipe 222. In other words, the heat transfer pipes of the two hollow heat transfer cavities B share the same first pipe 222.
[0047] refer to Figure 5 In some embodiments, the first pipe 222 and the second pipe 223 are detachably connected. By arranging the first pipe 222 and the second pipe 223 to be detachably connected, when a problem occurs in one pipe, the problematic pipe can be replaced or repaired separately without replacing the entire pipe, thereby facilitating repairs and reducing maintenance costs.
[0048] Specifically, if Figure 5 As shown, the first pipe 222 and the second pipe 223 are detachably connected by screws 225. A sealing ring 224 is provided between the connecting surfaces of the first pipe 222 and the second pipe 223 to improve the sealing performance of the heat transfer medium.
[0049] like Figure 5 As shown, the shelf 20 further includes a pipe interface 221 for introducing heat exchange medium into the heat conduction pipe. The heat exchange medium flows into the heat conduction channel through the pipe interface 221.
[0050] In some embodiments, the heat exchange medium flowing in the heat transfer pipe includes hot water or high-temperature refrigerant. The hot water or high-temperature refrigerant is passed into the heat transfer pipe to dissipate heat and thus heat the air in the hollow heat transfer cavity.
[0051] In other embodiments, the heat-conducting pipe includes an electric heating pipe.
[0052] In order to improve heating efficiency, in some embodiments, the shelf 20 further includes a fan disposed in the hollow heat transfer cavity B. The fan can accelerate the flow of air and improve heating efficiency.
[0053] In some embodiments, the shelf 20 further includes a pipe connection 221 for introducing heat exchange medium into the heat transfer pipe. The storage cabinet includes multiple heat supply connections spaced apart in the height direction Z. Each of the multiple heat supply connections is connected to the heating system to output the heat exchange medium, and the pipe connection 221 can be selectively connected to multiple heat supply connections. By providing multiple heat supply connections, shelves can be arranged at different heights within the cabinet 10. Alternatively, the shelves can be moved to any height to achieve the supply of heat exchange medium.
[0054] In some embodiments, the heating system includes a heat pump system that is configured to deliver high-temperature and high-pressure refrigerant to the heating interface and further deliver the refrigerant to the heat-conducting pipe through the pipe interface.
[0055] The following is based on Figures 1 to 5 The structure of a storage cabinet of a specific embodiment of the utility model is described in detail, and according to Figure 6 The structure of a storage cabinet in another specific embodiment of the present invention is described in detail.
[0056] like Figure 1 As shown, the storage cabinet of this embodiment includes a cabinet body 10 and shelves 20. The cabinet body 10 has an inner cavity. The shelves 20 are disposed within the inner cavity of the cabinet body 10 for storing items. The shelves 20 include a heating layer 21 and a supporting layer 22. The heating layer 21 is used to output heat, and the supporting layer 22 is used to store items that need to be heated.
[0057] like Figures 2 to 4 As shown, the heating layer 21 of the storage cabinet of this embodiment includes a frame-type splicing structure. The frame is a hollow structure with a flow channel inside. The hot liquid medium flows through the frame structure of the heating layer 21 to achieve heat output. The heating layer 21 is a frame structure with a large number of hollow areas in the middle. After the high-temperature heat exchange medium flows through the frame of the heating layer 21, it will heat the air around it. After the heated air has a low specific gravity, it will form convection upward from the hollow area below. The heat output by the heating layer 21 can achieve continuous and uniform heating of the items. Since the frame of the heating layer 21 is made of a high thermal conductivity material such as aluminum, it can be quickly released to the surroundings, thereby accelerating the heating speed of the items.
[0058] The heating layer 21 and the bearing layer 22 are both made of heat-conducting materials, and the bearing layer 22 is a grid shelf.
[0059] The shelves 20 of the storage cabinet of this embodiment include at least two grid shelves arranged on the heating layer 21, and the objects A are placed on the grid shelves.
[0060] Item A may be food, such as a beverage.
[0061] The frame and grid shelf of the heating layer 21 are made of materials with high thermal conductivity, such as metal aluminum or aluminum alloy.
[0062] like Figure 1 As shown, the cabinet 10 has an inner cavity. A plurality of shelves 20 are arranged in the inner cavity at intervals in the height direction Z. The cabinet 10 is a square cabinet. The shelves 20 are arranged in the cabinet 10 along its width direction X. Article A is placed on the shelves 20. Specifically, as shown in FIG. Figure 2 As shown, item A is placed on top of the grid shelf. In this way, during the upward convection of hot air, the bottom and side surfaces of item A become heated surfaces, thereby increasing the heat conduction area and optimizing the heat transfer effect.
[0063] like Figure 4As shown, in some embodiments, the heating layer 21 is a frame structure, which is assembled from a first pipe 222 and a second pipe 223. The first pipe 222 and the second pipe 223 are locked and fixed by screws 225, and a sealing ring 224 is installed at the connection to achieve a sealing effect. This structure is simple and reliable, low in cost, and a heating layer of appropriate width can be built according to the width requirements of the cabinet.
[0064] In some embodiments, the heating layer 21 includes an electric heating plate, for example, a PTC heating plate or a resistance wire plate.
[0065] In other embodiments, a heat transfer fluid flows through the heat-conducting pipes of the heating layer 21. For example, the heat transfer fluid is hot water or high-temperature refrigerant.
[0066] In some embodiments, the inner wall of the cabinet 10 is provided with multiple heating ports at different heights. The shelves 20 can be selectively connected to one of these ports. By providing multiple heating ports at different heights, the position of the shelves 20 can be adjusted according to the height of the items. Furthermore, the gaps between adjacent shelves 20 can be adjusted to varying heights, allowing the cabinet to accommodate items of varying types and sizes, thus expanding its applicability.
[0067] Furthermore, the multiple heating interfaces can realize the conduction between the heat-conducting pipes in the heating layer 21 and the external heating system, so that the heating function can be realized regardless of the height of the shelf.
[0068] Furthermore, a fan may be provided in the hollow heat transfer cavity of the heating layer 21 to accelerate air circulation, thereby improving heating efficiency.
[0069] like Figure 6 As shown, in other embodiments, the carrier layer 22 can be placed below the heating layer 21. By adjusting the width of the hollow heat transfer cavity of the heating layer 21, the object to be heated can be placed within the hollow heat transfer cavity. This is equivalent to directly heating the center of the object, which improves heating efficiency. Furthermore, this allows the object A to be heated not only by the hot air in the hollow heat transfer cavity but also by the heat radiation from the heat transfer pipe, thereby improving heating efficiency.
[0070] Specifically, there is a gap between the cavity wall of the hollow heat transfer cavity and the object A to be suitable for objects A of various types or sizes.
[0071] In other embodiments not shown in the drawings, reference may also be made to Figure 3 and Figure 6In the two embodiments, the shelf 20 includes a bearing layer 22 and two heating layers 21 respectively arranged on the upper and lower sides of the bearing layer 22. The two heating layers 21 include a first heating layer located above the bearing layer 22 and a second heating layer located below the bearing layer 22. Figure 6 , the article A passes through the hollow heat transfer cavity of the first heat-generating layer to be placed on the supporting layer 22. Figure 3 The second heating layer is arranged below the supporting layer 22, so the heated air in the hollow heat transfer cavity of the second heating layer passes through the supporting layer 22 to heat the object A.
[0072] By arranging the first heating layer and the second heating layer on the upper and lower sides of the carrier layer 22 respectively, the object A can be heated from different positions, thereby improving the heating efficiency.
[0073] In an embodiment not shown in the drawing, the supporting layer 22 includes a grid shelf, so that the hot air of the second heating layer located on the lower side can flow upward through the hollow part of the grid shelf to heat the object A.
[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for protection of the utility model.
Claims
1. A storage cabinet, characterized in that: include: Cabinet (10); and A shelf (20) is arranged in the cabinet (10), and the shelf (20) includes a heating layer (21) and a bearing layer (22), the bearing layer (22) is used to place and bear an article (A), the heating layer (21) is used to heat the article (A) and includes a hollow heat transfer cavity, heat conduction pipes are distributed in the circumference of the hollow heat transfer cavity, a heat conduction medium flows in the heat conduction pipes to heat the air in the hollow heat transfer cavity, and the heated air heats the article (A) on the bearing layer (22).
2. The storage cabinet according to claim 1, characterized in that: The heating layer (21) comprises a plurality of hollow heat transfer cavities arranged in sequence in the width direction (X) of the cabinet (10).
3. The storage cabinet according to claim 1, characterized in that The bearing layer (22) is arranged above the heating layer (21) and the bearing layer (22) is a grid structure.
4. The storage cabinet according to claim 3, characterized in that: The bearing layer (22) is made of a heat-conducting material and is in contact with the heating layer (21).
5. The storage cabinet according to claim 1, characterized in that: The bearing layer (22) is arranged below the heating layer (21), and the object (A) passes through the hollow heat transfer cavity to be carried and placed on the bearing layer (22).
6. The storage cabinet according to claim 1, characterized in that: The shelf (20) includes a bearing layer (22) and two heating layers (21) respectively arranged on the upper and lower sides of the bearing layer (22), the two heating layers (21) including a first heating layer located above the bearing layer (22) and a second heating layer located below the bearing layer (22), the article (A) passes through the hollow heat transfer cavity of the first heating layer to be placed on the bearing layer (22), and the heated air in the hollow heat transfer cavity of the second heating layer passes through the bearing layer (22) to heat the article (A).
7. The storage cabinet according to any one of claims 1 to 6, characterized in that: The shelf (20) comprises a plurality of first pipes (222) and a plurality of second pipes (223) spaced apart in a width direction (X) of the cabinet (10), each second pipe (223) being arranged between two adjacent first pipes (222) among the plurality of first pipes (222) so that the first pipes (222) and the second pipes (223) enclose each other to form the heat-conducting pipe.
8. The storage cabinet according to claim 7, characterized in that: The first pipe (222) and the second pipe (223) are detachably connected.
9. The storage cabinet according to any one of claims 1 to 6, characterized in that: The heat exchange medium flowing in the heat-conducting pipe includes hot water or high-temperature refrigerant; or, the heat-conducting pipe includes an electric heating pipe.
10. The storage cabinet according to any one of claims 1 to 6, characterized in that: The shelf (20) further includes a fan arranged in the hollow heat transfer cavity.
11. The storage cabinet according to any one of claims 1 to 6, characterized in that: The shelf (20) further includes a pipe interface (221) for introducing a heat exchange medium into the heat-conducting pipe. The storage cabinet includes a plurality of heating interfaces spaced apart in a height direction. The plurality of heating interfaces are all connected to a heating system to output the heat exchange medium. The pipe interface (221) can be selectively connected to the plurality of heating interfaces.