Cooking utensil provided with novel exhaust device
By connecting the exhaust vents of the upper and lower cooking cavities with the rear air outlet network and optimizing the channel design, the problems of complex structure and unreasonable layout of the exhaust devices of existing cooking appliances are solved, and a more reasonable exhaust structure and lower wind temperature rise effect are achieved.
Patent Information
- Application Number
- CN202422558855.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-10-14
- Estimated Expiration
- 2034-10-22
AI Technical Summary
The exhaust device of the existing cooking appliance arranged on the upper and lower layers has a complex structure and an unreasonable layout.
The upper cold air exhaust port, the upper hot air exhaust port and the lower hot air exhaust port of the upper air frying cooking cavity are all connected to the upper air outlet net located on the rear side of the machine body, and through the optimized channel design, the upper cold air and the upper hot air are mixed in the first channel and then discharged through the upper air outlet net, and the lower hot air is connected to the upper air outlet net through multiple channels and then discharged.
The exhaust structure is simplified and the overall layout is optimized, making the exhaust more reasonable, avoiding the temperature rise problem on the wall caused by the high temperature when the hot air is directly discharged, and improving the exhaust efficiency.
Smart Images

Figure CN223429438U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of kitchen cooking tools, and particularly relates to a cooking utensil equipped with a novel exhaust device. Background Art
[0002] Currently, when cooking appliances such as air fryers or air fryer ovens are in operation, the hot fan inside the air fryer burner activates, blowing heat from the heating element toward the food in the cooking chamber as air. Excess hot air and steam are then exhausted to the outside through the hot air exhaust port. The cold fan activates, dissipating the required heat from the oven as air through the cold air exhaust port. In the prior art, there are some cooking appliances with a double-layer layout, where the upper and lower cooking chambers are heated by the air fryer burners, respectively. However, the exhaust systems used to exhaust air from these burners are complex and poorly laid out, requiring further improvement. Utility Model Content
[0003] The utility model provides a cooking appliance equipped with a novel exhaust device, aiming to solve the problem of a relatively complex exhaust device structure of a cooking appliance provided with an upper and a lower air frying head in the prior art.
[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:
[0005] A cooking appliance equipped with a novel exhaust device, comprising:
[0006] The machine body is provided with an upper air frying cooking cavity and a lower air frying cooking cavity; the upper air frying cooking cavity is provided with an upper cold air exhaust port and an upper hot air exhaust port; the lower air frying cooking cavity is provided with a lower cold air exhaust port and a lower hot air exhaust port; and,
[0007] The exhaust device includes an upper air outlet net located on the rear side of the machine body, the upper cold air exhaust port, the upper hot air exhaust port and the lower hot air exhaust port are all connected to the upper air outlet net and exhaust to the outside through the upper air outlet net.
[0008] Further solution: the upper air frying cooking cavity includes an upper cooking cavity and an upper air frying assembly; the lower air frying cooking cavity includes a lower cooking cavity and a lower air frying assembly;
[0009] The upper air-frying assembly is located on the right side of the upper cooking cavity, and the lower air-frying assembly is located on the rear side of the lower cooking cavity.
[0010] Based on the above technical solution: by locating the upper air frying assembly on the right side of the upper cooking cavity, the lower air frying assembly on the rear side of the lower cooking cavity, and the upper air outlet net on the rear side of the machine body, and combining the layout in which the upper cold air exhaust port, the upper hot air exhaust port, and the lower hot air exhaust port are all connected to the upper air outlet net, the overall layout of the exhaust structure design is more reasonable and more optimized.
[0011] A further solution: the upper air outlet net includes an upper air outlet mesh located on the rear side and an upper exhaust channel located on the front side of the upper air outlet mesh hole, and the upper cold air exhaust port, the upper hot air exhaust port and the lower hot air exhaust port are all connected to the upper exhaust channel.
[0012] A further solution: the upper exhaust channel includes a first channel located on the upper side and a second channel located on the lower side; a partition is provided between the first channel and the second channel;
[0013] The upper cold air exhaust port and the upper hot air exhaust port are both communicated with the first channel, and the lower hot air exhaust port is communicated with the second channel.
[0014] Based on the above technical solution: the air with lower temperature discharged from the upper cold air exhaust port and the air with higher temperature discharged from the upper hot air exhaust port are mixed in the first channel, and after being discharged through the upper air outlet mesh, they are further neutralized with the hot air discharged from the second channel. The temperature is lower than the air temperature directly discharged from the hot air exhaust port. The above structural layout is more optimized and reasonable.
[0015] A further solution is that a third channel extending upward is provided on the upper side of the lower hot air exhaust port, and the third channel connects the lower hot air exhaust port and the second channel.
[0016] A further solution: the upper air frying assembly includes an upper hot air cover, an upper hot fan, an upper heating element, an upper cold air cover, an upper cold fan and an upper fan motor; the upper hot air cover forms an upper hot air cavity connected to the upper cooking cavity, the upper hot fan and the upper heating element are both located in the upper hot air cavity; the upper cold air cover and the upper hot air cover form an upper cold air cavity, the upper cold fan is located in the upper cold air cavity, the upper fan motor is located on the upper cold air cover and its output shaft is connected to the upper hot fan and the upper cold fan; the upper hot air exhaust port is provided on the hot air cover and is connected to the upper hot air cavity; the upper cold air exhaust port is provided on the upper cold air cover and is connected to the upper cold air cavity;
[0017] The lower air-frying assembly comprises a lower hot air cover, a lower hot air fan, a lower heating element, a lower cold air cover, a lower cold air fan and a lower fan motor; the lower hot air cover surrounds a lower hot air cavity in communication with the lower cooking cavity, and the lower hot air fan and the lower heating element are both located in the lower hot air cavity; the lower cold air cover surrounds a lower cold air cavity with the lower hot air cover, and the lower cold air fan is located in the lower cold air cavity; the lower fan motor is located on the lower cold air cover and its output shaft is connected with the lower hot air fan and the lower cold air fan; the lower hot air exhaust port is arranged on the lower cooking cavity; and the lower cold air exhaust port is arranged on the lower cold air cover and is in communication with the lower cold air cavity.
[0018] Based on the above technical scheme: the above arrangement enables the upper air-frying assembly to realize independent heating of the upper cooking cavity, and the lower air-frying assembly to realize independent heating of the lower cooking cavity, and the above arrangement makes the structural layout of the air exhaust device more reasonable.
[0019] Further scheme: the upper cold air cover is provided with an arc-shaped fourth channel, the air inlet end of the fourth channel is in communication with the air exhaust end of the third channel, and the air exhaust end of the fourth channel is in communication with the air inlet end of the second channel.
[0020] Based on the above technical scheme: since the second channel is arranged from front to back and the third channel is arranged from bottom to top, the arc-shaped fourth channel facilitates the communication between the third channel and the second channel, which is conducive to the exhaust of hot air.
[0021] Further scheme: the lower cooking cavity is provided with an annular insertion part extending upwards around the lower hot air exhaust port, the annular insertion part is provided with a connecting seat fixedly connected with the lower cooking cavity, the lower end of the connecting seat is sleeved on the outside of the annular insertion part, the upper end of the connecting seat is inserted into the air inlet end of the third channel, and the air exhaust end of the third channel is sleeved on the outside of the air inlet end of the fourth channel.
[0022] Based on the above technical scheme: the above connection mode makes the sealing between channels and between channels and the lower hot air exhaust port better.
[0023] Further scheme: the air exhaust device further comprises a lower air outlet net located at the rear side of the machine body, and the lower cold air exhaust port is in communication with the lower air outlet net.
[0024] Based on the above technical scheme: by arranging the lower air outlet net, the cold air exhausted from the lower cold air exhaust port is exhausted to the outside from the lower air outlet net.
[0025] Further scheme: the rear side of the machine body is provided with an air outlet net mounting plate, and the upper air outlet net and the lower air outlet net are both arranged on the air outlet net mounting plate.
[0026] Based on the above technical solution: the upper air outlet net and the lower air outlet net are both arranged on the air outlet net mounting plate, which is convenient for installation.
[0027] The beneficial effects of the utility model are:
[0028] In the present invention, the upper air frying cooking cavity is located on the upper side of the lower air frying cooking cavity, thereby forming an upper and lower double-layer cooking utensil. Both the upper air frying cooking cavity and the lower air frying cooking cavity heat the food by hot air. Each air frying cooking cavity is provided with a hot air exhaust port and a cold air exhaust port. By arranging the upper cold air exhaust port, the upper hot air exhaust port and the lower hot air exhaust port, they are all connected with the upper air outlet net, and exhaust is exhausted to the outside through the upper air outlet net, so that the exhaust structure design is simpler and the overall layout is more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.
[0030] Figure 1 The utility model is a schematic diagram of the exploded structure of a cooking appliance equipped with a novel exhaust device.
[0031] Figure 2 The utility model is a structural schematic diagram of an air outlet net mounting plate of a cooking appliance equipped with a novel exhaust device.
[0032] Figure 3 It is a schematic cross-sectional structural diagram of a cooking appliance equipped with a novel exhaust device in a first direction according to the present invention.
[0033] Figure 4 This is a schematic diagram of the enlarged structure at point A in Figure 3.
[0034] Figure 5 It is a schematic diagram of the cross-sectional structure of the air bomb assembly.
[0035] Figure 6 It is a schematic diagram of the cross-sectional structure of the lower air bomb assembly.
[0036] Description of the numbers in the figure:
[0037] 1-body; 11-upper cooking cavity; 12-lower cooking cavity; 121-annular plug-in part; 122-lower hot air exhaust port; 13-air outlet screen mounting plate; 14-upper air outlet screen; 141-first channel; 142-second channel; 143-partition plate; 15-lower air outlet screen; 151-slot; 2-upper air fryer assembly; 21-upper cooling air cover; 211-upper fan motor; 212-upper cooling fan; 21 3-Upper cold air exhaust port; 214-Fourth channel; 22-Upper hot air hood; 221-Upper hot fan; 222-Upper heating element; 223-Upper hot air exhaust port; 3-Lower air fryer assembly; 31-Lower cold air hood; 311-Lower fan motor; 312-Lower cold fan; 313-Lower cold air exhaust port; 32-Lower hot air hood; 321-Lower hot fan; 322-Lower heating element; 4-Connecting seat; 5-Third channel. DETAILED DESCRIPTION
[0038] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.
[0039] like Figures 1 to 4 As shown, this embodiment provides a cooking appliance equipped with a novel exhaust device, comprising:
[0040] The machine body 1 is provided with an upper air frying cooking cavity and a lower air frying cooking cavity; the upper air frying cooking cavity is provided with an upper cold air exhaust port 213 and an upper hot air exhaust port 223; the lower air frying cooking cavity is provided with a lower cold air exhaust port 313 and a lower hot air exhaust port 122; and,
[0041] The exhaust device includes an upper air outlet net 14 located on the rear side of the body 1, and the upper cold air exhaust port 213, the upper hot air exhaust port 223 and the lower hot air exhaust port 122 are all connected to the upper air outlet net 14 and exhaust to the outside through the upper air outlet net 14.
[0042] In this embodiment, the upper air-frying cooking cavity includes an upper cooking cavity 11 and an upper air-frying assembly 2 ; the lower air-frying cooking cavity includes a lower cooking cavity 12 and a lower air-frying assembly 3 .
[0043] To optimize the overall layout, the upper air-fryer assembly 2 is located on the right side of the upper cooking cavity 11, and the lower air-fryer assembly 3 is located at the rear of the lower cooking cavity 12. Specifically, the upper cooking cavity 11 can be used in conjunction with a drawer-type fryer, and the lower cooking cavity 12 can be equipped with a steam generator to function as a steam oven.
[0044] In this embodiment, Figure 1 and Figure 2 As shown, the upper air outlet mesh 14 includes an upper air outlet mesh 14 hole located at the rear side and an upper exhaust duct located in front of the upper air outlet mesh 14 hole. The upper cold air exhaust port 213, the upper hot air exhaust port 223, and the lower hot air exhaust port 122 are all connected to the upper exhaust duct. Specifically, the upper air outlet mesh 14 hole can be a strip-shaped hole.
[0045] The upper exhaust channel includes a first channel 141 located on the upper side and a second channel 142 located on the lower side; a partition 143 is provided between the first channel 141 and the second channel 142, and the partition 143 separates the first channel 141 and the second channel 142 from each other.
[0046] In another embodiment, the first channel 141 and the second channel 142 may be configured to be connected up and down.
[0047] The upper cold air outlet 213 and the upper hot air outlet 223 are both connected to the first channel 141, and the lower hot air outlet 122 is connected to the second channel 142. Specifically, the higher-temperature air discharged from the upper hot air outlet 223 and the lower-temperature air discharged from the upper cold air outlet 213, after mixing in the first channel 141, are lower in temperature than the hot air directly discharged from the hot air outlet. This prevents the wall from heating up too quickly when blown toward the wall. The hot air discharged from the second channel 142 is discharged through the holes in the upper air outlet mesh 14 and then mixes with the air discharged from the first channel 141.
[0048] In this embodiment, Figure 1 、 Figure 3 and Figure 5As shown, the upper air-frying assembly 2 is arranged on the right side of the upper cooking cavity 11, and the upper air-frying assembly 2 includes an upper hot air cover 22, an upper hot fan 221, an upper heating element 222, an upper cold air cover 21, an upper cold fan 212 and an upper fan motor 211; the upper hot air cover 22 forms an upper hot air cavity connected to the upper cooking cavity 11, and the upper hot fan 221 and the upper heating element 222 are both located in the upper hot air cavity; the upper cold air cover 21 and the upper hot air cover 22 form an upper cold air cavity, the upper cold fan 212 is located in the upper cold air cavity, the upper fan motor 211 is located on the upper cold air cover 21 and its output shaft is connected to the upper hot fan 221 and the upper cold fan 212; the upper hot air exhaust port 223 is arranged on the hot air cover and is connected to the upper hot air cavity; the upper cold air exhaust port 213 is arranged on the upper cold air cover 21 and is connected to the upper cold air cavity. The operating principle is as follows: when the upper air fryer assembly 2 is in operation, the upper heating fan 221 rotates to blow the heat from the upper heating element 222 into the upper cooking cavity 11 in the form of hot air, heating the food. Excess hot air is discharged through the upper hot air exhaust port 223. The upper cooling fan 212 rotates to dissipate heat from the upper fan motor 211 in the machine body 1. The air generated during the heat dissipation process is discharged through the upper cold air exhaust port 213.
[0049] like Figure 1 、 Figure 3 and Figure 6 As shown, the lower air-frying assembly 3 includes a lower hot air hood 32, a lower hot fan 321, a lower heating element 322, a lower cold air hood 31, a lower cold fan 312, and a lower fan motor 311. The lower hot air hood 32 forms a lower hot air cavity connected to the lower cooking cavity 12, with the lower hot fan 321 and the lower heating element 322 both located within the lower hot air cavity. The lower cold air hood 31 and the lower hot air hood 32 form a lower cold air cavity, with the lower cold fan 312 located within the lower cold air cavity. The lower fan motor 311 is located on the lower cold air hood 31, with its output shaft connected to the lower hot fan 321 and the lower cold fan 312. The lower hot air exhaust port 122 is located on the lower cooking cavity 12, and the lower cold air exhaust port 313 is located on the lower cold air hood 31 and connected to the lower cold air cavity. Its operating principle is the same as that of the upper air-frying assembly 2 and will not be further described.
[0050] Wherein, both the upper heating element 222 and the lower heating element 322 can be configured as heating tubes.
[0051] In this embodiment, Figure 3 As shown, the lower hot air exhaust port 122 is arranged on the upper side wall of the lower cooking cavity 12. In order to facilitate its communication with the second channel 142, a third channel 5 extending upward is provided on the upper side of the lower hot air exhaust port 122. The third channel 5 connects the lower hot air exhaust port 122 with the second channel 142.
[0052] The upper cold air cover 21 is provided with an arcuate fourth channel 214. The air inlet of the fourth channel 214 communicates with the air outlet of the third channel 5, and the air outlet of the fourth channel 214 communicates with the air inlet of the second channel 142. Since the second channel 142 is arranged from front to back and the third channel 5 extends from bottom to top, the arcuate fourth channel 214 facilitates communication between the third channel 5 and the second channel 142, facilitating the exhaust of hot air from the lower cooking cavity 12 through the upper air outlet net 14.
[0053] In this embodiment, Figure 3 As shown, the lower cooking cavity 12 is provided with an upwardly extending annular plug portion 121 surrounding the lower hot air exhaust port 122. A connecting base 4 is provided on the annular plug portion 121, which is fixedly connected to the lower cooking cavity 12. The lower end of the connecting base 4 is sleeved outside the annular plug portion 121, and the upper end of the connecting base 4 is inserted into the air inlet end of the third channel 5. The exhaust end of the third channel 5 is sleeved outside the air inlet end of the fourth channel 214. Specifically, two screw fixing portions are provided on opposite sides of the connecting base 4, and the two screw fixing portions are fixedly connected to the upper cooking cavity 11 via two screws.
[0054] In this embodiment, Figure 1 and Figure 2 As shown, the exhaust device also includes a lower air outlet mesh 15 located on the rear side of the housing 1, and the lower cold air exhaust port 313 is connected to the lower air outlet mesh 15. Specifically, the lower cold air cover 31 is bent backward in an arc near the lower air outlet mesh 15, so that the lower cold air exhaust port 313 faces the lower air outlet mesh 15. A slot 151 is provided on the front side of the lower air outlet mesh 15, and the rear end of the lower cold air exhaust port 313 is inserted into the slot 151.
[0055] In this embodiment, in order to facilitate the installation of the exhaust device, an air outlet net mounting plate 13 is provided on the rear side of the body 1, and the upper air outlet net 14 and the lower air outlet net 15 are both provided on the air outlet net mounting plate 13. Specifically, the air outlet net mounting plate 13 can be fixedly connected to the body 1 by screws or the like.
[0056] Working principle description:
[0057] When the upper air fryer assembly 2 is in operation, the upper heating fan 221 blows heat from the upper heating element 222 into the upper cooking cavity 11 in the form of hot air, heating the food. Excess hot air is discharged through the upper hot air exhaust port 223. The upper cooling fan 212 operates to dissipate heat from the upper fan motor 211 within the machine body 1. The air generated during this heat dissipation process is discharged through the upper cold air exhaust port 213. The air discharged from both the upper cold air exhaust port 213 and the upper hot air exhaust port 223 is discharged to the outside through the first passage 141.
[0058] When the lower air-frying assembly 3 is in operation, the lower heating fan 321 blows heat from the lower heating element 322 into the lower cooking cavity 12 in the form of hot air, heating the food. Excess hot air is discharged from the lower hot air exhaust port 122 and then discharged to the outside through the third channel 5, the fourth channel 214, and the second channel 142 through the holes in the upper air outlet net 14. The lower cooling fan 312 operates to dissipate heat from the lower fan motor 311 in the machine body 1. The air generated during this heat dissipation process is discharged from the lower cold air exhaust port 313 and then discharged to the outside through the lower air outlet net 15.
[0059] The present invention is not limited to the above optional implementation methods. Under the premise of not conflicting with each other, the various solutions can be combined arbitrarily. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in their shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the scope of protection of the present invention.
Claims
1. A cooking appliance equipped with a novel exhaust device, characterized in that: include: The machine body is provided with an upper air frying cooking cavity and a lower air frying cooking cavity; the upper air frying cooking cavity is provided with an upper cold air exhaust port and an upper hot air exhaust port; the lower air frying cooking cavity is provided with a lower cold air exhaust port and a lower hot air exhaust port; as well as, The exhaust device includes an upper air outlet net located on the rear side of the machine body, the upper cold air exhaust port, the upper hot air exhaust port and the lower hot air exhaust port are all connected to the upper air outlet net and exhaust to the outside through the upper air outlet net.
2. A cooking appliance equipped with a novel exhaust device according to claim 1, characterized in that: The upper air-frying cooking cavity comprises an upper cooking cavity and an upper air-frying assembly; the lower air-frying cooking cavity comprises a lower cooking cavity and a lower air-frying assembly; The upper air-frying assembly is located on the right side of the upper cooking cavity, and the lower air-frying assembly is located on the rear side of the lower cooking cavity.
3. The cooking appliance equipped with a novel exhaust device according to claim 2, characterized in that: The upper air outlet net includes an upper air outlet mesh hole located at the rear side and an upper exhaust channel located at the front side of the upper air outlet mesh hole. The upper cold air exhaust port, the upper hot air exhaust port and the lower hot air exhaust port are all connected to the upper exhaust channel.
4. The cooking appliance equipped with a novel exhaust device according to claim 3, characterized in that: The upper exhaust channel includes a first channel located on the upper side and a second channel located on the lower side; a partition is provided between the first channel and the second channel; The upper cold air exhaust port and the upper hot air exhaust port are both communicated with the first channel, and the lower hot air exhaust port is communicated with the second channel.
5. The cooking appliance equipped with a novel exhaust device according to claim 4, characterized in that: A third channel extending upward is provided on the upper side of the lower hot air exhaust port, and the third channel connects the lower hot air exhaust port and the second channel.
6. The cooking appliance equipped with a novel exhaust device according to claim 5, characterized in that: The upper air frying assembly includes an upper hot air cover, an upper hot fan, an upper heating element, an upper cold air cover, an upper cold fan and an upper fan motor; the upper hot air cover forms an upper hot air cavity connected to the upper cooking cavity, the upper hot fan and the upper heating element are both located in the upper hot air cavity; the upper cold air cover and the upper hot air cover form an upper cold air cavity, the upper cold fan is located in the upper cold air cavity, the upper fan motor is located on the upper cold air cover and its output shaft is connected to the upper hot fan and the upper cold fan; the upper hot air exhaust port is provided on the hot air cover and is connected to the upper hot air cavity; the upper cold air exhaust port is provided on the upper cold air cover and is connected to the upper cold air cavity; The lower air frying assembly includes a lower hot air hood, a lower hot fan, a lower heating element, a lower cold air hood, a lower cold fan and a lower fan motor; the lower hot air hood forms a lower hot air cavity connected to the lower cooking cavity, and the lower hot fan and the lower heating element are both located in the lower hot air cavity; the lower cold air hood and the lower hot air hood form a lower cold air cavity, and the lower cold fan is located in the lower cold air cavity, and the lower fan motor is located on the lower cold air hood and its output shaft is connected to the lower hot fan and the lower cold fan; the lower hot air exhaust port is arranged on the lower cooking cavity; the lower cold air exhaust port is arranged on the lower cold air hood and is connected to the lower cold air cavity.
7. The cooking appliance equipped with a novel exhaust device according to claim 6, characterized in that: An arc-shaped fourth channel is provided on the upper cooling air cover. The air inlet end of the fourth channel is communicated with the exhaust end of the third channel, and the exhaust end of the fourth channel is communicated with the air inlet end of the second channel.
8. The cooking appliance equipped with a novel exhaust device according to claim 7, characterized in that: The lower cooking cavity is provided with an upwardly extending annular plug-in portion surrounding the lower hot air exhaust port, and the annular plug-in portion is provided with a connecting seat fixedly connected to the lower cooking cavity, the lower end of the connecting seat is sleeved on the outside of the annular plug-in portion, and the upper end of the connecting seat is inserted into the air inlet end of the third channel, and the exhaust end of the third channel is sleeved on the outside of the air inlet end of the fourth channel.
9. The cooking appliance equipped with a novel exhaust device according to claim 2, characterized in that: The exhaust device further comprises a lower air outlet net located at the rear side of the machine body, and the lower cold air exhaust port is communicated with the lower air outlet net.
10. The cooking appliance equipped with a novel exhaust device according to claim 9, characterized in that: An air outlet net mounting plate is provided on the rear side of the machine body, and the upper air outlet net and the lower air outlet net are both provided on the air outlet net mounting plate.