Air frying oven with high-efficiency air inlet and exhaust channel

Abstract

The utility model provides an air frying oven with a high-efficiency air inlet and exhaust channel, and aims to solve the problem of low heat dissipation efficiency in an oven body when the air frying oven works due to unreasonable design of air inlet and exhaust channels on part of air frying ovens in the prior art. An air frying oven with a high-efficiency air inlet and exhaust channel comprises an oven body; the air inlet channel comprises a first air inlet channel, a second air inlet channel and a third air inlet channel; air enters the cold air cavity from the right rear part of the oven body; the second air inlet channel enters the cold air cavity from the upper part of the oven body; the third air inlet channel enters the cold air cavity from the bottom of the oven body; the air exhaust channel is arranged on the oven body, and the air exhaust channel comprises a first air exhaust channel for exhausting air towards the left rear portion of the oven body and a second air exhaust channel for exhausting air towards the right rear portion of the oven body. The air inlet and exhaust channels are reasonable in layout, and the air inlet and exhaust efficiency is higher.

Description

TECHNICAL FIELD

[0001] The utility model belongs to kitchen electric appliances technical field, concretely relates to an air roaster with high efficiency air inlet and exhaust passage. BACKGROUND

[0002] At present, air roaster is often used for cooking food in the kitchen, which mainly roasts food by hot air, so that food presents the crisp taste of frying. When the air roaster works, the hot fan blows the heat of the heating tube to the cooking cavity in the form of hot air, and part of the hot air and steam is discharged from the exhaust passage, and the cold fan absorbs air from the outside and discharges the heat of the motor in the roaster body to the outside in the form of wind. However, the structure and layout design of the air inlet passage and the exhaust passage on part of the air roasters in the prior art are unreasonable, which leads to low heat dissipation efficiency in the roaster body when the air roaster works, and therefore further improvement is needed. SUMMARY

[0003] The utility model provides an air roaster with high efficiency air inlet and exhaust passage, which aims at solving the problem of unreasonable design of air inlet and exhaust passage on part of the air roasters in the prior art, which leads to low heat dissipation efficiency in the roaster body when the air roaster works.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0005] An air roaster with high efficiency air inlet and exhaust passage comprises:

[0006] A roaster body is provided with a cooking cavity, the rear side of the cooking cavity is provided with a hot air cavity in communication with the cooking cavity, and the rear side of the hot air cavity is provided with a cold air cavity;

[0007] An air inlet passage comprises a first air inlet passage for air inlet from the back of the roaster body to the cold air cavity, a second air inlet passage for air inlet from the upper part of the roaster body to the cold air cavity, and a third air inlet passage for air inlet from the bottom of the roaster body to the cold air cavity; and

[0008] An exhaust passage is arranged on the roaster body, which comprises a first exhaust passage for air outlet towards the left rear of the roaster body and a second exhaust passage for air outlet towards the right rear of the roaster body; the first exhaust passage is in communication with the hot air cavity and the cold air cavity, and the second exhaust passage is in communication with the hot air cavity and the cold air cavity.

[0009] Further scheme: the oven body is provided with a fan assembly, the fan assembly comprises a hot air fan located in the hot air cavity, a cold air fan located in the cold air cavity and a driving motor located at the rear side of the cold air cavity, and the hot air fan and the cold air fan are coaxially arranged on the output shaft of the driving motor.

[0010] Based on the above technical scheme: the driving motor is arranged at the rear side of the cold air cavity, so that the overall layout is more optimized, so that the cold air fan can more effectively dissipate heat for the driving motor.

[0011] Further scheme: the oven body is provided with an air inlet cavity, and the cold air cavity is provided with a plurality of cold air inlet holes communicating the cold air cavity and the air inlet cavity.

[0012] Based on the above technical scheme: the air inlet cavity serves as a communication between the cold air cavity and the outside, so that the air sucked from the upper part, the rear part and the bottom part of the oven body passes through the air inlet cavity and then enters the cold air cavity through the cold air inlet hole, thereby increasing the air inlet efficiency.

[0013] Further scheme: a plurality of first air inlet holes communicating the air inlet cavity and the outside are arranged on the rear wall of the oven body, and an annular channel surrounding the first air inlet holes is arranged on the front side of the rear wall of the oven body, and the annular channel extends forward from the rear wall of the oven body.

[0014] The first air inlet channel comprises the first air inlet hole, the annular channel, the air inlet cavity located between the annular channel and the cold air inlet hole, and the cold air inlet hole.

[0015] Based on the above technical scheme: the annular channel is arranged to increase the air inlet pressure of the first air inlet channel, so that the air inlet is smoother.

[0016] Further scheme: a plurality of second air inlet holes communicating the air inlet cavity and the outside are arranged around the top of the left side wall, the top of the right side wall and the top of the rear wall of the oven body, and the second air inlet channel comprises the second air inlet hole, the air inlet cavity located between the second air inlet hole and the cold air inlet hole, and the cold air inlet hole.

[0017] Based on the above technical scheme: the air entering the air inlet cavity from the second air inlet hole can take away the heat that needs to be dissipated from the upper part of the oven body, so that the components on the upper side of the air inlet cavity can be more effectively dissipated.

[0018] Further scheme: a plurality of third air inlet holes communicating the air inlet cavity and the outside are arranged on the bottom of the oven body, and the third air inlet channel comprises the third air inlet hole, the air inlet cavity located between the third air inlet hole and the cold air inlet hole, and the cold air inlet hole.

[0019] Based on the above technical scheme: the air entering the air inlet cavity from the third air inlet can take away the heat that needs to be dissipated from the lower part of the oven body, thereby more effectively dissipating heat from the lower part of the air inlet cavity.

[0020] Further scheme: the oven body is provided with upper and lower two mutually independent cooking cavities, the rear side of each cooking cavity is provided with the hot air cavity in communication with the cooking cavity, and the rear side of the hot air cavity is provided with the cold air cavity; the upper and lower two cold air cavities are in communication with the air inlet cavity.

[0021] The oven body is provided with upper and lower two first air inlet channels and upper and lower two groups of air outlet channels, each first air inlet channel is in communication with the corresponding cold air cavity, and each group of air outlet channels is in communication with the corresponding hot air cavity and cold air cavity.

[0022] Based on the above technical scheme: by arranging two independent upper and lower cooking cavities, and each cooking cavity corresponding to a cold air cavity and a hot air cavity and an air outlet channel, the air fryer can cook more food at a time, and the two cooking cavities are arranged side by side, reducing the horizontal space occupied in the kitchen; by arranging two cold air cavities in communication with the air inlet cavity, the cold air fan on the upper side or the lower side can dissipate heat from the electronic components in the oven body when working alone; and for each cold air cavity, air can be introduced from the second air inlet channel on the upper part of the oven body, the third air inlet channel on the bottom, and the upper and lower two first air inlet channels, so that the air inlet efficiency is higher.

[0023] Further scheme: the first air outlet channel and the second air outlet channel on the upper side are arranged in a staggered manner in the oven body; the first air outlet channel and the second air outlet channel on the lower side are arranged in a staggered manner in the oven body.

[0024] Based on the above technical scheme: the above arrangement can avoid mutual interference when the first air outlet channel and the second air outlet channel on the upper side and the lower side discharge air to the outside, so that the air discharge is more smooth.

[0025] Further scheme: the cold air cavity is provided with a first cold air outlet and a second cold air outlet, and the hot air cavity is provided with a first hot air outlet and a second hot air outlet.

[0026] The left rear part on the rear side wall of the oven body is provided with a first air outlet communicating with the outside, and the right rear part on the rear side wall of the oven body is provided with a second air outlet communicating with the outside; the first cold air outlet and the first hot air outlet are provided with a first channel between the first air outlet, and the second cold air outlet and the second hot air outlet are provided with a second channel between the second air outlet.

[0027] The first air outlet channel comprises the first cold air outlet, the first hot air outlet, the first channel and the first air outlet; and the second air outlet channel comprises the second cold air outlet, the second hot air outlet, the second channel and the second air outlet.

[0028] Further scheme: the rear side of the oven body is provided with a protruding part protruding rearward, the first air outlet is located on the left side of the protruding part, and the second air outlet is located on the right side of the protruding part.

[0029] Based on the above technical scheme: by arranging the protruding part, the distance between the first air outlet and the second air outlet and the wall at the rear side of the oven is increased, so that the problem of too rapid temperature rise of the wall can be further avoided during air exhaust.

[0030] The beneficial effects of the utility model are:

[0031] 1. The utility model discloses a first air inlet channel that includes air inlet from the back of the oven body to the cold air cavity, a second air inlet channel that includes air inlet from the upper part of the oven body to the cold air cavity and a third air inlet channel that includes air inlet from the bottom of the oven body to the cold air cavity, and a first air outlet channel that includes air exhaust to the left rear of the oven body and a second air outlet channel that includes air exhaust to the right rear of the oven body, so that the efficiency of air intake and exhaust of the air fryer is increased, the efficiency of air intake and exhaust is higher when the cold air fan is working, the heat exchange efficiency with the outside is higher, the heat dissipation of the motor and other components in the oven body is facilitated and the heat dissipation efficiency is improved.

[0032] 2. The first air outlet channel and the second air outlet channel are respectively communicated with the cold air cavity and the hot air cavity, so that the cold air discharged from the cold air cavity and the hot air discharged from the hot air cavity can be mixed in the first air outlet channel and the second air outlet channel, and the temperature of the mixed air is lower than that of the hot air discharged from the hot air cavity.

[0033] 3. The first air outlet channel is arranged to exhaust air to the left rear, and the second air outlet channel is arranged to exhaust air to the right rear, so that the air discharged from the two air outlet channels does not directly blow the wall, the temperature rise of the wall is prevented from being too fast and high, and the standard of wall temperature rise test can be met.

[0034] 4. The air intake and exhaust ducts are staggered to ensure that air intake and exhaust do not interfere with each other, resulting in a more reasonable layout. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the upper and lower exhaust channels of an air fryer oven with high-efficiency air intake and exhaust channels according to this utility model.

[0037] Figure 2 This is a schematic diagram of the cross-sectional structure of an air fryer oven in the first direction.

[0038] Figure 3 This is a schematic diagram of the cross-sectional structure of an air fryer oven in the second direction.

[0039] Figure 4 This is a schematic diagram of the structure of the first hot air outlet, the first cold air outlet, and the first channel.

[0040] Explanation of the labels in the diagram:

[0041] 1-Oven body; 11-Cooking cavity; 12-Hot air cavity; 121-Hot air fan; 13-Cold air cavity; 131-Cold air fan; 132-Cold air inlet; 14-Drive motor; 15-First air inlet; 151-Annular channel; 16-Second air inlet; 17-Third air inlet; 18-Air inlet cavity; 2-First exhaust channel; 21-First exhaust vent; 22-First hot exhaust vent; 23-First cold exhaust vent; 24-First channel; 3-Second exhaust channel; 31-Second exhaust vent. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0043] like Figures 1 to 4 As shown, an air fryer oven with a high-efficiency air intake and exhaust channel includes:

[0044] The oven body 1 is internally provided with a cooking cavity 11, the rear side of the cooking cavity 11 is provided with a hot air cavity 12 in communication with the cooking cavity 11, and the rear side of the hot air cavity 12 is provided with a cold air cavity 13;

[0045] An air inlet channel is arranged on the oven body 1, which includes a first air inlet channel for air inlet from the back of the oven body 1 to the cold air cavity 13, a second air inlet channel for air inlet from the upper part of the oven body 1 to the cold air cavity 13, and a third air inlet channel for air inlet from the bottom of the oven body 1 to the cold air cavity 13.

[0046] An air outlet channel is arranged on the oven body 1, which includes a first air outlet channel 2 for air outlet towards the left rear of the oven body 1 and a second air outlet channel 3 for air outlet towards the right rear of the oven body 1; the first air outlet channel 2 is in communication with the hot air cavity 12 and the cold air cavity 13, and the second air outlet channel 3 is in communication with the hot air cavity 12 and the cold air cavity 13.

[0047] In some embodiments, as shown in Figure 2 and Figure 3 The oven body 1 is internally provided with a fan assembly, which includes a hot air fan 121 located in the hot air cavity 12, a cold air fan 131 located in the cold air cavity 13, and a driving motor 14 located at the rear side of the cold air cavity 13; the hot air fan 121 and the cold air fan 131 are coaxially arranged on the output shaft of the driving motor 14. Specifically, when the cold air fan 131 is working, air is simultaneously introduced from the first air inlet channel, the second air inlet channel and the third air inlet channel to the cold air cavity 13, and then the heat generated in the oven body is removed and discharged to the outside through the first air outlet channel 2 and the second air outlet channel 3. When the hot air fan 121 is working, air is introduced from the cold air cavity 13, and then discharged to the outside through the first air outlet channel 2 and the second air outlet channel 3.

[0048] In some embodiments, as shown in Figure 2 and Figure 3 The oven body 1 is internally provided with an air inlet cavity 18, and the cold air cavity 13 is provided with a plurality of cold air inlet holes 132 in communication with the cold air cavity 13 and the air inlet cavity 18. Specifically, the components in the oven body 1 that need to be cooled are arranged in the air inlet cavity 18, and the cold air fan 131 works to suck in cold air from the outside, remove the heat generated in the air inlet cavity 18, and then discharge it to the outside.

[0049] In some embodiments, as shown in Figures 1 to 4As shown, as an embodiment of the first air inlet channel, a plurality of first air inlets 15 are arranged on the rear side wall of the oven body 1 to communicate the air inlet cavity 18 with the outside, and an annular channel 151 is arranged around the first air inlets 15 on the front side of the rear side wall of the oven body 1 and extends forward from the rear side wall of the oven body 1. The driving motor 14 is located between the annular channel 151 and the rear side wall of the cold air cavity 13.

[0050] The first air inlet channel includes the first air inlets 15, the annular channel 151, the air inlet cavity 18 between the annular channel 151 and the cold air inlet 132, and the cold air inlet 132. Specifically, the air from the outside enters the annular channel 151 through the first air inlets 15, then passes through the air inlet cavity 18 between the annular channel 151 and the cold air inlet 132, and is then sucked into the cold air cavity 13 through the cold air inlet 132.

[0051] In some embodiments, as an embodiment of the second air inlet channel, a plurality of second air inlets 16 are arranged around the top of the left side wall, the top of the right side wall, and the top of the rear side wall of the oven body 1 to communicate the air inlet cavity 18 with the outside. The second air inlet channel includes the second air inlets 16, the air inlet cavity 18 between the second air inlets 16 and the cold air inlet 132, and the cold air inlet 132. Specifically, the air from the outside enters the air inlet cavity 18 through the second air inlets 16, then passes through the air inlet cavity 18, and then enters the cold air cavity 13 through the cold air inlet 132.

[0052] In some embodiments, as an embodiment of the third air inlet channel, a plurality of third air inlets 17 are arranged on the bottom of the oven body 1 to communicate the air inlet cavity 18 with the outside. The third air inlet channel includes the third air inlets 17, the air inlet cavity 18 between the third air inlets 17 and the cold air inlet 132, and the cold air inlet 132. Specifically, the air from the outside enters the air inlet cavity 18 through the third air inlets 17, and then enters the cold air cavity 13 through the cold air inlet 132.

[0053] In this embodiment, the air inlet cavity 18 is specifically the space inside the oven body 1 that communicates between the first air inlets 15 and the cold air inlet 132, the space that communicates between the second air inlets 16 and the cold air inlet 132, and the space that communicates between the third air inlets 17 and the cold air inlet 132. The air inlet cavity 18 functions to communicate the cold air cavity 13 with the outside, so that the air sucked from the upper part, the back, and the bottom of the oven body 1 all enters the cold air cavity 13 through the cold air inlet 132 after passing through the air inlet cavity 18, thereby increasing the efficiency of air intake and heat dissipation.

[0054] In some embodiments, as shown in Figures 1 to 4 The oven body 1 is provided with two upper and lower cooking cavities 11 independent of each other, and the rear side of each cooking cavity 11 is provided with a hot air cavity 12 in communication with the cooking cavity 11, and the rear side of the hot air cavity 12 is provided with a cold air cavity 13; the upper and lower cold air cavities 13 are in communication with the air inlet cavity 18;

[0055] The oven body 1 is provided with two upper and lower first air inlet channels and two upper and lower sets of air outlet channels, each first air inlet channel is in communication with the corresponding cold air cavity 13, and each set of air outlet channels is in communication with the corresponding hot air cavity 12 and cold air cavity 13. The upper and lower sets of air outlet channels are independent of each other. Specifically, when the upper drive motor 14 is working, the upper cold air fan 131 can take in air through the second air inlet hole 16 at the top of the oven body 1, the third air inlet hole 17 at the bottom of the oven body 1, and the two sets of first air inlet holes 15 on the upper and lower rear walls of the oven body 1, so that the air inlet efficiency is higher. The same is true for the lower drive motor 14.

[0056] In some embodiments, the first air outlet channel 2 and the second air outlet channel 3 on the upper side are arranged in a staggered manner in the oven body 1; the first air outlet channel 2 and the second air outlet channel 3 on the lower side are arranged in a staggered manner in the oven body 1. Specifically, the first air outlet channel 2 and the second air outlet channel 3 are arranged in a staggered manner upwards and downwards when discharging air to the outside, which can avoid mutual interference and make the air discharge more smooth.

[0057] In some embodiments, as shown in Figures 1 to 4 The cold air cavity 13 is provided with a first cold air outlet 23 and a second cold air outlet, and the hot air cavity 12 is provided with a first hot air outlet 22 and a second hot air outlet;

[0058] The left rear part of the rear wall of the oven body 1 is provided with a first air outlet 21 in communication with the outside, and the right rear part of the rear wall of the oven body 1 is provided with a second air outlet 31 in communication with the outside; the first cold air outlet 23 and the first hot air outlet 22 are provided with a first channel 24 between the first air outlet 21, and the second cold air outlet and the second hot air outlet are provided with a second channel between the second air outlet 31; specifically, the air inlet end of the first channel 24 is in communication with the first hot air outlet 22 and the first cold air outlet 23 at the same time, and the air outlet end of the first channel 24 is in communication with the first air outlet, and the same is true for the second channel.

[0059] The first exhaust channel 2 comprises the first cold exhaust port, the first hot exhaust port, the first channel 24 and the first exhaust port; and the second exhaust channel 3 comprises the second cold exhaust port, the second hot exhaust port, the second channel and the second exhaust port.

[0060] In some embodiments, the rear side of the oven body 1 is provided with a protrusion arranged rearward, the first exhaust port is located at the left side of the protrusion, and the second exhaust port is located at the right side of the protrusion. The protrusion increases the distance between the first exhaust port and the second exhaust port and the wall of the rear side of the oven, thereby further avoiding the problem of rapid temperature rise of the wall during exhaust.

[0061] Working principle:

[0062] When the cold air fan 131 is working, air is simultaneously introduced into the cold air cavity 13 from the first air inlet channel, the second air inlet channel and the third air inlet channel, and the heat generated in the oven body is removed, and then the air is exhausted to the outside through the first exhaust channel 2 and the second exhaust channel 3. When the hot air fan 121 is working, air is introduced into the cold air cavity 13, and then the air is exhausted to the outside through the first exhaust channel 2 and the second exhaust channel 3. The layout of the plurality of air inlet channels and the exhaust channels makes the air inlet and exhaust efficiency higher, thereby making the heat dissipation efficiency higher.

[0063] The utility model is not limited to the above optional implementation, and each scheme can be combined arbitrarily on the premise of not contradicting each other; anyone can derive other various forms of products under the inspiration of the utility model, but no matter any change in shape or structure, any technical scheme falling within the scope defined by the claims of the utility model falls within the protection scope of the utility model.

Claims

1. An air fryer oven having high efficiency air intake and exhaust channels, characterized in that, The oven body is provided with a cooking cavity, a hot air cavity communicated with the cooking cavity at the back side of the cooking cavity, and a cold air cavity at the back side of the hot air cavity. The air inlet channel includes a first air inlet channel for air inlet into the cold air cavity from the back of the oven body, a second air inlet channel for air inlet into the cold air cavity from the upper part of the oven body, and a third air inlet channel for air inlet into the cold air cavity from the bottom of the oven body. The air outlet channel is provided on the oven body and includes a first air outlet channel for air outlet towards the left back of the oven body and a second air outlet channel for air outlet towards the right back of the oven body; the first air outlet channel is communicated with the hot air cavity and the cold air cavity, and the second air outlet channel is communicated with the hot air cavity and the cold air cavity. The oven body is provided with a fan assembly including a hot air fan in the hot air cavity, a cold air fan in the cold air cavity, and a driving motor at the back side of the cold air cavity; the hot air fan and the cold air fan are coaxially arranged on the output shaft of the driving motor. The oven body is provided with an air inlet cavity, and the cold air cavity is provided with a plurality of cold air inlet holes communicating the cold air cavity and the air inlet cavity.

2. The air fryer oven with high efficiency air intake and exhaust passage according to claim 1, characterized in that, The back wall of the oven body is provided with a plurality of first air inlet holes communicating the air inlet cavity and the outside, and the front side of the back wall of the oven body is provided with an annular channel surrounding the first air inlet holes, and the annular channel extends forward from the back wall of the oven body.

3. The air fryer oven with high efficiency air intake and exhaust passage according to claim 1, wherein, The first air inlet channel includes the first air inlet hole, the annular channel, the air inlet cavity between the annular channel and the cold air inlet hole, and the cold air inlet hole.

4. The air fryer oven with high efficiency air intake and exhaust passage according to claim 3, characterized in that, A plurality of second air inlet holes are arranged around the top of the left side wall, the top of the right side wall, and the top of the back wall of the oven body, and the second air inlet channel includes the second air inlet hole, the air inlet cavity between the second air inlet hole and the cold air inlet hole, and the cold air inlet hole. The bottom of the oven body is provided with a plurality of third air inlet holes communicating the air inlet cavity and the outside, and the third air inlet channel includes the third air inlet hole, the air inlet cavity between the third air inlet hole and the cold air inlet hole, and the cold air inlet hole.

5. The air fryer oven with high efficiency air intake and exhaust passage according to claim 3, wherein, The oven body is provided with two upper and lower cooking cavities independent of each other, and the back side of each cooking cavity is provided with a hot air cavity communicated with the cooking cavity, and the back side of the hot air cavity is provided with a cold air cavity; the upper and lower cold air cavities are communicated with the air inlet cavity.

6. The air fryer oven with high efficiency air intake and exhaust passage according to claim 3, wherein, The oven body is provided with two upper and lower first air inlet channels and two upper and lower air outlet channels; each first air inlet channel is communicated with the corresponding cold air cavity, and each air outlet channel is communicated with the corresponding hot air cavity and cold air cavity.

7. The air fryer oven with high efficiency air intake and exhaust passage according to claim 3, wherein, ​ ​ 8. The air fryer oven with high efficiency air intake and exhaust passage according to claim 7, wherein, The first and second air exhaust channels on the upper side are arranged in an up-down staggered manner in the oven body; the first and second air exhaust channels on the lower side are arranged in an up-down staggered manner in the oven body.

9. The air fryer oven with high efficiency air intake and exhaust passage according to claim 1, wherein, The cold air cavity is provided with a first cold air exhaust opening and a second cold air exhaust opening, and the hot air cavity is provided with a first hot air exhaust opening and a second hot air exhaust opening. The left rear part of the rear wall of the oven body is provided with a first air exhaust opening connected to the outside, and the right rear part of the rear wall of the oven body is provided with a second air exhaust opening connected to the outside; the first cold air exhaust opening, the first hot air exhaust opening, and the first air exhaust opening are provided with a first channel, and the second cold air exhaust opening, the second hot air exhaust opening, and the second air exhaust opening are provided with a second channel. The first air exhaust channel comprises the first cold air exhaust opening, the first hot air exhaust opening, the first channel, and the first air exhaust opening; the second air exhaust channel comprises the second cold air exhaust opening, the second hot air exhaust opening, the second channel, and the second air exhaust opening.

10. The air fryer oven with high efficiency air intake and exhaust passage according to claim 9, wherein, The rear side of the oven body is provided with a protruding part protruding rearward, the first air exhaust opening is located on the left side of the protruding part, and the second air exhaust opening is located on the right side of the protruding part.

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