Infrared defrosting device

Abstract

This invention provides an infrared defrosting device, comprising a housing, an inner liner, an infrared heater, a fan, and a flow guide. The inner liner contains a heating zone for placing the item to be heated and a heat source zone equipped with the infrared heater. The infrared heater's irradiation direction faces the heating zone. The fan generates airflow from the heat source zone to the heating zone. The flow guide alters the direction of the airflow generated by the fan as it passes the infrared heater, making it non-parallel to the irradiation direction of the heater. This design, through fan-driven airflow circulation, delivers high-temperature air from the heat source zone to the heating zone, accelerating heat exchange on the surface of the item. Simultaneously, it prevents the fan from obstructing the infrared heater and allows infrared radiation and airflow to heat different surfaces of the item separately, resulting in staggered coverage areas and preventing localized overheating or underheating of the item.

Description

Technical Field

[0001] This utility model relates to the field of food processing equipment technology, and in particular to an infrared defrosting device. Background Technology

[0002] In current infrared defrosting devices, the airflow generated by the fan is often parallel to the direction of the infrared heater's radiation. This results in a specific surface of the item being heated being heated by both infrared radiation and strong airflow, while other surfaces, such as the back or sides, heat up slowly because they are not effectively covered. This leads to excessive heat concentration on the directly irradiated surface and a significant lag in the defrosting speed of the non-directly irradiated surface.

[0003] Therefore, how to set the relative positions of the fan and the infrared heater so that the functions of infrared radiation and airflow inside the infrared defrosting device can effectively complement each other and achieve uniform heating of the items to be heated has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defect of uneven heating in the existing infrared defrosting device and to provide an infrared defrosting device.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] An infrared defrosting device includes a housing, an inner liner, and an infrared heater. The device also includes a fan and a flow guide. The inner liner has a heating zone and a heat source zone. The infrared heater is disposed in the heat source zone. The heating zone is used to place items to be heated. The infrared heater is directed towards the heating zone. The fan generates airflow from the heat source zone to the heating zone. The flow guide ensures that the airflow generated by the fan passes through the infrared heater in a direction that is not parallel to the infrared heater's irradiation direction.

[0007] A fan drives airflow circulation, transporting high-temperature air from the heat source area to the area to be heated. This creates convective heat exchange between the inner wall of the liner and the air, accelerating heat exchange on the surface of the item to be heated. A further airflow guide is incorporated to alter the direction of the airflow generated by the fan as it passes over the infrared heater. This direction is not parallel to the direction of the infrared heater's radiation. This avoids the need for the fan to be positioned to block the infrared heater, and also ensures that both infrared radiation and the fan-generated airflow are directed towards the area to be heated, heating different surfaces of the item within that area. This staggered coverage prevents localized overheating or underheating of the item.

[0008] Preferably, the guide portion includes a smoothly transitioned arc surface structure;

[0009] And / or, the guide portion is formed at the corner position of the inner liner.

[0010] Compared to other forms of airflow guiding structures, the smooth transition of the arc surface structure allows the airflow generated by the fan to flow naturally along the curved surface, avoiding increased airflow friction resistance due to airflow hitting the corners, thereby reducing the overall energy consumption of the infrared defrosting device; by setting the airflow guide at the corner position of the inner liner, the addition of the airflow guide allows the corresponding position of the box insulation material to be thicker, which can effectively prevent heat loss to the outside, and the overall energy utilization rate is higher.

[0011] Preferably, the fan is located at the top center of the inner liner, and the air guides are respectively located on both sides of the fan, with the two air guides symmetrically arranged relative to the central axis of the inner liner.

[0012] By placing the fan at the top center of the inner liner, airflow can radiate from the top of the inner liner to the surrounding areas. Furthermore, by symmetrically positioning the airflow guide relative to the central axis of the inner liner, the airflow guides the airflow to cover the heating area more evenly, significantly reducing the heating difference between the left and right sides of the item to be heated, thereby avoiding uneven heating and localized thawing of the item.

[0013] Preferably, the infrared heater is disposed on the flow guide portion;

[0014] And / or, the infrared heater is an infrared lamp bead.

[0015] By installing the infrared heater on the flow guide, the infrared radiation can cover the interior of the inner liner more evenly, minimizing the problem of localized blind spots and slow localized defrosting caused by radiation direction limitations on the items to be heated. Using infrared LEDs as infrared heaters is compact and easy to arrange densely or dispersedly to adapt to complex inner liner structures. At the same time, the infrared LEDs have strong directional radiation, which can concentrate infrared energy on the items to be heated in the heating area, resulting in high energy utilization.

[0016] Preferably, the infrared heater is positioned close to the fan.

[0017] The infrared heater is the core heat source of the infrared defrosting device. When it is working, it will create a local high temperature environment in the heat source area. When the fan is placed close to the infrared heater, it can directly and quickly draw in this part of the high temperature air and blow it to the area to be heated, reducing the heat loss due to heat retention in the heat source area and preventing the infrared heater from failing or being damaged due to overheating.

[0018] Preferably, the infrared defrosting device further includes a heat transfer structure, which is arranged along the wall of the inner liner, with a portion of the heat transfer structure located near the infrared heater and another portion located near the contact surface between the inner liner and the item to be heated.

[0019] By placing one part of the heat transfer structure close to the infrared heater and the other part close to the contact surface between the inner liner and the item to be heated, such as the bottom or side wall of the inner liner, the heat generated by the infrared heater can be effectively transferred to the contact surface between the inner liner and the item to be heated. This allows the surface of the item to be heated, which cannot be directly irradiated by infrared rays, to quickly absorb heat through heat conduction, further shortening the defrosting cycle. On the other hand, it can also effectively dissipate heat from the infrared heater.

[0020] Preferably, the heat transfer structure is disposed on the outside of the inner liner and located between the inner liner and the box body;

[0021] And / or, the heat transfer structure includes a tubular structure;

[0022] And / or, the heat transfer structure is symmetrically arranged with respect to the central axis of the inner liner.

[0023] By placing the heat transfer structure between the inner liner and the outer casing, excessive space occupation within the inner liner can be avoided, thus preventing interference with the installation of other components within the inner liner. The tubular structure allows for installation in narrow spaces such as the area between the inner liner and the outer casing, without occupying the core space of the heating zone. Furthermore, if the tubular structure needs to be bent into an arc to fit the shape of the inner liner, its manufacturing cost is relatively low. By symmetrically arranging the heat transfer structure relative to the central axis of the inner liner, the contact surface between the item to be heated and the inner liner can be heated evenly.

[0024] Preferably, the air outlet of the fan is positioned facing the center of the area to be heated;

[0025] And / or, the air inlet of the fan is disposed facing the top wall of the inner liner, a plurality of infrared heaters are distributed around the air inlet, and the air guide is located at least between the infrared heaters and the air inlet.

[0026] The center of the heating zone is typically where the items to be heated are concentrated. Positioning the fan outlet directly towards this center allows the generated hot airflow to directly act on this critical area, rapidly raising its temperature. Furthermore, the concentrated airflow at the center diffuses outwards, creating a more efficient synergy with the infrared heater's irradiation direction, optimizing internal airflow circulation and maintaining high-efficiency heat exchange. The air inlet faces the top wall of the inner liner, drawing in air from near the top wall. After being accelerated by the fan, the air is returned to the heating zone through the outlet, preventing heat from accumulating and being wasted on the top wall. A guide section is located at least between the infrared heater and the air inlet, guiding the infrared-heated air into the fan inlet in an orderly manner, improving the efficiency of hot air intake.

[0027] Preferably, the fan is an axial flow fan.

[0028] In infrared defrosting devices, by setting up axial fans, the airflow blown out can flow along the fan axis, and the airflow has strong directionality and a small diffusion angle. The stable directional airflow of the axial fans can accurately cover the area to be heated, reduce the ineffective diffusion of airflow to non-target areas of the device, avoid heat waste, and improve heat utilization efficiency.

[0029] Preferably, the inner liner is made of aluminum;

[0030] And / or, the material of the enclosure includes thermal insulation material.

[0031] Aluminum has a high thermal conductivity, which allows it to quickly transfer the heat generated by the infrared heater, reducing temperature differences between different areas of the inner wall of the chamber and preventing heating dead zones caused by poor local heat conduction. This ensures that the items to be heated in the heating zone are heated more evenly. The insulation material effectively blocks heat exchange between the inside and outside of the chamber, preventing heat generated internally from diffusing into the external environment. This allows the temperature of the heating zone to quickly reach the set value and remain stable, reducing the continuous operating time of the infrared heater and thus lowering energy consumption.

[0032] The significant advantages of this invention are as follows: By driving airflow circulation through a fan, high-temperature air from the heat source area is transported to the area to be heated, forming convective heat exchange between the inner wall of the inner liner and the air, thus accelerating the surface heat exchange of the item to be heated. Furthermore, a guide section is provided to change the direction of the airflow generated by the fan as it passes through the infrared heater, ensuring that this direction is not parallel to the direction of the infrared heater's radiation. This avoids the need for the fan to be positioned to block the infrared heater, and also allows both infrared radiation and the airflow generated by the fan to be directed towards the area to be heated, heating different surfaces of the item within that area. This allows for staggered coverage areas, preventing localized overheating or underheating of the item. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the internal structure of an infrared defrosting device according to an embodiment of the present invention (I).

[0034] Figure 2 This is a schematic diagram (II) of the internal structure of an infrared defrosting device according to an embodiment of the present invention.

[0035] Figure 3 This is a schematic diagram (a) of the internal airflow circulation of an infrared defrosting device according to an embodiment of the present invention.

[0036] Figure 4 This is a schematic diagram (II) of the internal airflow circulation of an infrared defrosting device according to an embodiment of the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] Infrared defrosting device 1

[0039] Box 10

[0040] Inner liner 20

[0041] Flow guide 21

[0042] Top wall 22

[0043] Infrared heater 30

[0044] Fan 40

[0045] Air inlet 41

[0046] Air outlet 42

[0047] Heating Zone 50

[0048] Heat source area 60

[0049] 70 items to be heated

[0050] Heat transfer structure 80

[0051] The direction of airflow through the infrared heater, A

[0052] Irradiation direction B of the infrared heater Detailed Implementation

[0053] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0054] Example 1

[0055] like Figures 1-4As shown, this utility model provides an infrared defrosting device 1, which includes a housing 10, an inner liner 20, and an infrared heater 30. The infrared defrosting device 1 also includes a fan 40 and two guide sections 21 formed on the upper left and right sides of the inner liner 20. A heating zone 50 is disposed in the lower space of the inner liner 20, and a heat source zone 60 is disposed in the upper space. The two infrared heaters 30 are respectively located on the left and right sides of the heat source zone 60 and are disposed on the guide sections 21. The heating zone 50 is used to place the item 70 to be heated. The irradiation direction B of the infrared heaters 30 is directed towards the heating zone 50. The fan 40 is used to generate airflow from the heat source zone 60 to the heating zone 50. The guide sections 21 located on the upper left and right sides of the inner liner 20 have a smooth, curved transition structure, which is used to guide the airflow generated by the fan 40 through the flow direction A of the infrared heaters 30 (see...). Figure 3 The direction indicated by the dashed arrow A) and the irradiation direction B of the infrared heater 30 (see...) Figure 4 (The direction indicated by the dashed arrow B) is not parallel.

[0056] The fan 40 drives airflow circulation, transporting the high-temperature air from the heat source area 60 to the heating area 50, forming convective heat exchange between the inner wall of the inner liner 20 and the air, accelerating the surface heat exchange of the item 70 to be heated. A guide section 21 is further provided to change the flow direction A of the airflow generated by the fan 40 through the infrared heater 30, ensuring that this flow direction is not parallel to the irradiation direction B of the infrared heater 30. This avoids the need for the fan 40 to be positioned to block the infrared heater 30, and also ensures that both infrared radiation and the airflow generated by the fan 40 are directed towards the heating area 50, heating different surfaces of the item 70 within the heating area 50. This allows for staggered coverage areas, preventing localized overheating or underheating of the item 70.

[0057] like Figures 1-4 As shown, in this embodiment, the guide portion 21 includes a smoothly transitioned arc surface structure, and the guide portion 21 is formed at the corner position of the inner liner 20.

[0058] Compared to other forms of airflow guiding structures, the smooth transition of the arc surface structure allows the airflow generated by the fan 40 to flow naturally along the arc surface, avoiding increased airflow friction resistance due to airflow hitting the corners, thereby reducing the overall energy consumption of the infrared defrosting device 1; the airflow guiding part 21 is set at the corner position of the inner liner 20, and the addition of the airflow guiding part 21 allows the heat insulation material of the box 10 at the corresponding position to be thicker, which can effectively prevent heat loss to the outside, and the overall energy utilization rate is higher.

[0059] like Figures 1-4As shown, in this embodiment, the fan 40 is located at the top center of the inner liner 20, and two air guides 21 are respectively located on both sides of the fan 40. The two air guides 21 are symmetrically arranged relative to the central axis of the inner liner 20.

[0060] By placing the fan 40 at the top center of the inner liner 20, airflow can radiate from the top of the inner liner 20 to the surrounding area. Furthermore, by symmetrically arranging the guide section 21 relative to the central axis of the inner liner 20, the guide section 21 can guide the airflow to cover the heating area 50 more evenly, significantly reducing the heating difference between the left and right sides of the item to be heated 70, thereby avoiding uneven heating and localized thawing of the item to be heated 70.

[0061] like Figures 1-4 As shown, two infrared heaters 30 are respectively disposed on the flow guides 21 on the left and right sides; the infrared heaters 30 are infrared lamp beads.

[0062] By positioning the infrared heater 30 on the flow guide 21, infrared radiation can be more evenly distributed over the interior of the inner liner 20, minimizing the risk of localized blind spots and slow localized defrosting of the item to be heated 70 due to radiation direction limitations. Using infrared LEDs as the infrared heater 30 results in a compact size, making it easy to arrange densely or dispersedly to fit the complex structure of the inner liner 20. Furthermore, the strong directional radiation of the infrared LEDs allows them to concentrate infrared energy onto the item to be heated 70 in the heating area 50, resulting in high energy utilization.

[0063] like Figures 1-4 As shown, the infrared heater 30 is positioned close to the fan 40.

[0064] The infrared heater 30 is the core heat source of the infrared defrosting device 1. When it is working, it will create a local high temperature environment in the heat source area 60. When the fan 40 is placed close to the infrared heater 30, it can directly and quickly draw in this part of the high temperature air and blow it to the area to be heated 50, reducing the heat loss due to heat retention in the heat source area 60 and preventing the infrared heater 30 from failing or being damaged due to overheating.

[0065] like Figures 1-4 As shown, the infrared defrosting device 1 also includes a heat transfer structure 80, which is arranged along the wall of the inner liner 20. The upper part of the heat transfer structure 80 is located near the infrared heater 30, and the lower part of the heat transfer structure 80 is located near the contact surface between the inner liner 20 and the item 70 to be heated.

[0066] By placing a portion of the heat transfer structure 80 close to the infrared heater 30 and another portion of the heat transfer structure 80 close to the contact surface between the inner liner 20 and the item 70 to be heated, such as at the bottom or side wall of the inner liner 20, the heat generated by the infrared heater 30 can be effectively transferred to the contact surface between the inner liner 20 and the item 70 to be heated. This allows the surface of the item 70 that cannot be directly irradiated by infrared rays to quickly absorb heat through heat conduction, further shortening the defrosting cycle. On the other hand, it can also effectively dissipate heat from the infrared heater 30.

[0067] like Figures 1-4 As shown, the heat transfer structure 80 is disposed on the outside of the inner liner 20 and located between the inner liner 20 and the box body 10; the heat transfer structure 80 includes a tubular structure; the heat transfer structure 80 is symmetrically arranged relative to the central axis of the inner liner 20.

[0068] By placing the heat transfer structure 80 between the inner liner 20 and the housing 10, excessive space occupation within the inner liner 20 can be avoided, thus preventing interference with the installation of other components within the inner liner 20. Setting the heat transfer structure 80 as a tubular structure allows it to be laid in narrow spaces such as the area between the inner liner 20 and the housing 10, without occupying the core space of the area to be heated 50. Furthermore, if the tubular structure needs to be bent into an arc shape to fit the inner liner 20, its manufacturing cost is relatively low. Of course, in other embodiments, the heat transfer structure 80 can also be set as a strip or sheet structure according to usage requirements; this part is prior art and will not be elaborated here. By symmetrically arranging the heat transfer structure 80 relative to the central axis of the inner liner 20, the contact surface between the item to be heated 70 and the inner liner 20 can be heated evenly.

[0069] like Figures 1-4 As shown, the air outlet 42 of the fan 40 is positioned towards the center of the area to be heated 50; the air inlet 41 of the fan 40 is positioned towards the top wall 22 of the inner liner 20; two infrared heaters 30 are distributed around the air inlet 41; and a portion of the guide section 21 is located between the infrared heaters 30 and the air inlet 41.

[0070] The center of the heating zone 50 is usually the area where the items to be heated 70 are concentrated. By setting the air outlet 42 of the fan 40 directly towards the center of the heating zone 50, the hot airflow generated by the fan 40 can directly act on this key area, quickly raising the temperature of the area. After the airflow is concentrated at the center, it will diffuse to the surrounding edges, forming a more efficient synergy with the irradiation direction of the infrared heater 30, optimizing the internal airflow circulation and maintaining efficient heat exchange.

[0071] In the infrared defrosting device 1 of this embodiment, the fan 40 is an axial flow fan 40.

[0072] In the infrared defrosting device 1, by setting an axial fan 40, the airflow blown out by the fan 40 can flow along the axis of the fan 40. The airflow has strong directionality and a small diffusion angle. The stable directional airflow of the axial fan 40 can accurately cover the area to be heated 50, reduce the ineffective diffusion of airflow to non-target areas of the device, avoid heat waste, and improve heat utilization efficiency.

[0073] In the infrared defrosting device 1 of this embodiment, the inner liner 20 is made of aluminum; the body 10 is made of heat-insulating material.

[0074] Aluminum has a high thermal conductivity, which can quickly transfer the heat generated by the infrared heater 30, reducing the temperature difference between different areas of the inner wall of the inner liner 20 and avoiding heating dead zones caused by poor local heat conduction. This ensures that the items 70 to be heated in the heating zone 50 are heated more evenly. The insulation material can effectively block heat exchange between the inside and outside of the chamber 10, preventing the heat generated by internal heating from diffusing into the external environment. This allows the temperature of the heating zone 50 to quickly reach the set value and remain stable, reducing the continuous working time of the infrared heater 30 and thus reducing energy consumption.

[0075] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. An infrared thawing apparatus, characterized by, It includes a housing, an inner liner, and an infrared heater. The infrared defrosting device also includes a fan and a flow guide. The inner liner has a heating zone and a heat source zone. The infrared heater is located in the heat source zone. The heating zone is used to place items to be heated. The infrared heater is directed towards the heating zone. The fan generates airflow from the heat source zone to the heating zone. The flow guide ensures that the airflow generated by the fan is not parallel to the infrared heater's irradiation direction.

2. The infrared thawing apparatus of claim 1, wherein The flow guide includes a smoothly transitioned arc surface structure; And / or, the guide portion is formed at the corner position of the inner liner.

3. The infrared thawing apparatus of claim 1, wherein The fan is located at the top center of the inner liner, and the air guides are respectively located on both sides of the fan. The two air guides are symmetrically arranged with respect to the central axis of the inner liner.

4. The infrared thawing apparatus of claim 1, wherein The infrared heater is disposed on the flow guide section; And / or, the infrared heater is an infrared lamp bead.

5. The infrared thawing apparatus of claim 1, wherein, The infrared heater is positioned close to the fan.

6. The infrared thawing apparatus of claim 1, wherein, The infrared defrosting device also includes a heat transfer structure, which is arranged along the wall of the inner liner. A portion of the heat transfer structure is located near the infrared heater, and another portion of the heat transfer structure is located near the contact surface between the inner liner and the item to be heated.

7. The infrared thawing apparatus of claim 6, wherein The heat transfer structure is disposed on the outside of the inner liner and located between the inner liner and the box body; And / or, the heat transfer structure includes a tubular structure; And / or, the heat transfer structure is symmetrically arranged with respect to the central axis of the inner liner.

8. The infrared defrosting device as described in claim 1, characterized in that, The air outlet of the fan is positioned facing the center of the area to be heated; And / or, the air inlet of the fan is disposed facing the top wall of the inner liner, a plurality of infrared heaters are distributed around the air inlet, and the air guide is located at least between the infrared heaters and the air inlet.

9. The infrared thawing apparatus of any of claims 1-8, wherein, The fan is an axial flow fan.

10. The infrared thawing apparatus of any one of claims 1-8, wherein, The inner liner is made of aluminum; And / or, the material of the enclosure includes thermal insulation material.

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