Slim design, full heat exchange and haze removal integrated machine

Abstract

The present invention discloses a slim design, universal full heat exchange and haze removal integrated machine, comprising a closed machine body, a first baffle, a second baffle and a heat exchange core arranged in the machine body, the first baffle dividing the machine body into an upper front air inlet cavity and a lower front air outlet cavity, the second baffle dividing the machine body into an upper rear air outlet cavity and a lower rear air inlet cavity, the upper front air inlet cavity, the air inlet passage of the heat exchange core and the lower rear air inlet cavity forming an air inlet passage, the lower front air outlet cavity, the air outlet passage of the heat exchange core and the upper rear air outlet cavity forming an air outlet passage, an exhaust fan arranged in the lower front air outlet cavity, and an air inlet fan arranged in the lower rear air inlet cavity. The present invention has a simple structure and strong practicality.

Description

Technical Field

[0001] The invention relates to the field of a full heat exchange and haze removal integrated machine, and in particular to a full heat exchange and haze removal integrated machine with a slim design and universal front and back properties. Background Art

[0002] The fresh air ventilation device currently on the market has an independent exhaust and air supply system. The polluted air is discharged to the outside through the exhaust port, exhaust duct and exhaust fan, and the fresh air outside is sent into the room through the supply fan, supply duct and air supply port. The exhaust fan and the supply fan are placed in the same box. When the fan is working, the incoming fresh air and the exhausted air will pass through the heat exchange core in the fan box at the same time. With the help of the heat exchange core, the exhausted air and the incoming fresh air will exchange heat and recover energy.

[0003] However, the Chinese invention patent number is 201710466124.2, and the patent name is a full-heat haze removal and fresh air integrated machine, which has the following disadvantages: 1: The structure design is relatively heavy; 2: The front and back cannot be installed at will; 3: The design of the air supply and exhaust flow channels is complex and circuitous. 4: The heat exchange is completely carried out by the heat exchange core, and the energy consumption is relatively high. Summary of the invention

[0004] The purpose of the present invention is to address the shortcomings of the prior art and at least to solve the technical problems in the related technology to a certain extent, and to provide a slim design, universal front and back full heat exchange and haze removal all-in-one machine, so as to achieve the purpose of light and thin equipment, universal front and back, and full heat exchange in the upper and lower flow channels.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a slim design, universal full heat exchange and haze removal integrated machine, comprising a closed body, in which a first partition, a second partition and a heat exchange core are arranged, the first partition divides the body into an upper front air intake chamber and a lower front air outlet chamber for mutual heat exchange, the second partition divides the body into an upper rear air outlet chamber and a lower rear air inlet chamber for mutual heat exchange, the upper front air intake chamber, the air inlet duct of the heat exchange core and the lower rear air inlet chamber constitute an air intake duct, the lower front air outlet chamber, the air outlet duct of the heat exchange core and the upper rear air outlet chamber constitute an outlet duct, an exhaust fan is arranged in the lower front air outlet chamber, and an air intake fan is arranged in the lower rear air inlet chamber.

[0006] Furthermore, the first separator and the second separator have a thickness of 0.5 mm to 2 mm and are made of metal.

[0007] Furthermore, a front separation frame and a rear separation frame are provided on both sides of the heat exchange core, the front separation frame is provided with a front sealing plate, the front sealing plate is located below the center of the front separation frame, and the front sealing plate divides the front separation frame into a front upper hole and a front lower hole, and the rear separation frame is provided with a rear sealing plate, the rear sealing plate is located above the center of the rear separation frame, and the rear sealing plate divides the rear separation frame into a rear upper hole and a rear lower hole.

[0008] Furthermore, a load-bearing bar is provided on the front sealing plate, a load-bearing bar is provided on the rear sealing plate, and a "C"-shaped load-bearing sleeve is provided on the left and right sides of the heat exchange core, the load-bearing sleeve is clamped on the load-bearing bar, and a rubber strip is provided inside the load-bearing sleeve, and positioning strips are provided on the upper and lower sides of the heat exchange core, and a rubber strip is clamped on the positioning strip. The upper and lower interiors of the body are respectively fixed with an upper top plate and a lower top plate, and the upper top plate and the lower top plate are respectively in contact with the rubber strips located on the upper and lower sides of the heat exchange core, and both ends of the heat exchange core are sealed and connected to the inner wall of the body.

[0009] Furthermore, the first partition includes a first front plate, a second front plate and a third front plate, the level of the third front plate is higher than that of the first front plate, both ends of the second front plate are respectively connected to the first front plate and the third front plate, and the first front plate is sealed to the front sealing plate.

[0010] Furthermore, the second partition includes a first rear plate, a second rear plate and a third rear plate, the horizontal height of the third rear plate is higher than the horizontal height of the first rear plate, the two ends of the second rear plate are respectively connected to the first rear plate and the third rear plate, and the first rear plate is sealed to the rear sealing plate.

[0011] Furthermore, the third front plate is provided with a first notch, and a first front baffle plate and a second front inclined plate are provided in the body, the first front baffle plate and the second front inclined plate are connected and sealed at the first notch respectively, and the second front inclined plate is inclined along one side of the exhaust fan and is sealed with the inner wall of the body.

[0012] Furthermore, the third rear plate is provided with a second notch, and a first rear baffle plate and a second rear inclined plate are provided in the body. The first rear baffle plate and the second rear inclined plate are connected and sealed at the second notch respectively. The second rear inclined plate is inclined along one side of the intake fan and is sealed with the inner wall of the body.

[0013] Furthermore, an upper plate is provided on the machine body, which is fixedly fitted to the upper wall of the machine body, a coarse filter and an electrostatic high-voltage package are arranged in sequence between the upper plate and the first front plate, and the coarse filter and the electrostatic high-voltage package are respectively limited by a number of "L"-shaped baffles in cross-section, a lower plate is provided on the machine body, which is fixedly fitted to the lower wall of the machine body, a fine filter is arranged between the first rear plate and the lower plate, and the fine filter is limited by a number of "L"-shaped baffles in cross-section.

[0014] Furthermore, a front air inlet and a front air outlet are provided on one side of the machine body, and a rear air inlet and a rear air outlet are provided on the other side. The front air inlet, the front air outlet, the rear air inlet and the rear air outlet are located at the same horizontal height, and the calibers of the front air inlet, the front air outlet, the rear air inlet and the rear air outlet are the same.

[0015] The technical effects of the present invention are mainly reflected in the following aspects: 1: The inlet and outlet air channels of the present invention are inverted "X"-shaped heat exchange channels, which are more reasonably designed and the exhaust and intake are smoother.

[0016] 2: The indoor dirty air that has not entered the upper rear air outlet chamber of the heat exchange core and the outdoor fresh air that has entered the lower rear air inlet chamber of the heat exchange core are once again subjected to up and down heat exchange; and the outdoor fresh air that has not entered the upper front air inlet chamber of the heat exchange core and the indoor dirty air that has entered the lower front air outlet chamber of the heat exchange core are once again subjected to up and down heat exchange. With such a design, heat exchange is carried out in every part inside the body of the present invention, thus saving energy and reducing consumption. At the same time, the internal operating temperature of the body is balanced to prevent the occurrence of excessive local temperature of the body.

[0017] 3: The load-bearing of the heat exchange core lies on the load-bearing strips and the load-bearing sleeves, which are centrally loaded. No matter it is installed on the front or back, the rubber strips on both sides are respectively in contact with the upper top plate and the lower top plate, and the rubber strips are in an extruded state, which plays a sealing role. The coarse filter, electrostatic high-voltage package and fine filter are limited and fixed in multiple directions, so that the present invention can be installed on the front or back, so that it is more convenient to install in a limited position space.

[0018] 4: The third rear plate and the third front plate are designed to float, and the first rear plate and the first front plate are designed to sink, which not only makes the installation of other accessories more compact, but also makes the sum of the volume of the upper front air inlet cavity and the lower rear air inlet cavity and the sum of the volume of the upper rear air outlet cavity and the lower front air outlet cavity not much different. The caliber of the front air inlet, the caliber of the front air outlet, the caliber of the rear air inlet and the caliber of the rear air outlet are the same, so that the air intake and air outlet volumes are similar, the equipment operation is more reasonable, the hot air volume is not much different from the cold air volume, the heat exchange effect is better, and the heat exchange is more uniform.

[0019] 5: The middle load-bearing design of the heat exchanger, the floating design of the third rear plate and the third front plate, the sinking design of the first rear plate and the first front plate, the front sealing plate design, the rear sealing plate design, the second front inclined plate and the second rear inclined plate's rotation design, make the body of the present invention more lightweight, with a thickness equal to only the thickness of the heat exchange core plus the thickness of the top plate, the lower top plate and the two side walls of the body, without any other unnecessary wasted space or structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 This is a structural schematic diagram highlighting the exhaust fan of the present invention;

[0022] Figure 3 This is a structural schematic diagram highlighting the first partition of the present invention;

[0023] Figure 4 It is a schematic diagram of the internal structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the present invention in which the machine body is open and the exhaust fan is protruding;

[0025] Figure 6 It is a schematic diagram of the structure of the present invention in which the machine body is open and the second rear inclined plate is protruding;

[0026] Figure 7 It is a schematic diagram of the structure of the heat exchange core bearing the load;

[0027] Figure 8 It is a schematic diagram of the interior of the present invention;

[0028] Fig. 9 It is a schematic diagram of the present invention. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention so that the technical solution of the present invention is easier to understand and grasp, but should not be understood as a limitation to the present invention.

[0030] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8 The slim design, universal full heat exchange and haze removal integrated machine shown in the figure comprises a closed body 1, in which a first partition 2, a second partition 3 and a heat exchange core 4 are arranged, the first partition 2 divides the front half of the body 1 into an upper front air intake chamber 201 and a lower front air outlet chamber 202, the second partition 3 divides the rear half of the body 1 into an upper rear air outlet chamber 301 and a lower rear air intake chamber 302, the upper front air intake chamber 201, the air inlet duct of the heat exchange core 4 and the lower rear air inlet chamber 302 constitute an inlet air flow duct, the lower front air outlet chamber 202, the air outlet duct of the heat exchange core 4 and the upper rear air outlet chamber 301 constitute an outlet air flow duct, the lower front air outlet chamber 202 is provided with an exhaust fan 01, and the lower rear air inlet chamber 302 is provided with an air intake fan 02.

[0031] It is a prior art that a heat exchange core has an air inlet and an air outlet.

[0032] like Figure 1As shown: one side of the machine body 1 is provided with a front air inlet 11 and a front air outlet 12, and the other side is provided with a rear air inlet 13 and a rear air outlet 14. Through the design of the first partition 2 and the second partition 3, the first partition 2 divides the machine body 1 into two upper and lower air chambers, namely, an upper front air chamber 201 and a lower front air outlet chamber 202, and the second partition 3 divides the machine body 1 into two upper and lower air chambers, namely, an upper rear air outlet chamber 301 and a lower rear air inlet chamber 302. Fig. 9 As shown by the middle dotted line G: exhaust principle: air passes through the rear air outlet 14, the upper rear air outlet cavity 301, the front lower hole 413, the air outlet of the heat exchange core 4, the rear upper hole 422, the lower front air outlet cavity 202, the exhaust fan 01 and the front air outlet 12 in sequence. Fig. 9 As shown by the dotted line F: Air intake principle: air passes through the front air inlet 11, the upper front air inlet cavity 201, the front upper hole 412, the air inlet of the heat exchange core 4, the rear lower hole 423, the lower rear air inlet cavity 302, the air intake fan 02, and the rear air inlet 13. Compared with the traditional circuitous flow channel design, the inlet and outlet flow channels of the present invention are inverted "X"-shaped heat exchange flow channels, which are more reasonably designed and the exhaust and intake are smoother.

[0033] The thickness of the first baffle 2 and the second baffle 3 is 0.5mm-2mm, and they are made of metal aluminum and galvanized metal plates. The thermal conductivity of thin aluminum plates is better. Combined with the inverted "X" shape design of the above-mentioned inlet and outlet air ducts, especially in winter and summer, the temperature difference between indoor and outdoor is particularly large. The indoor dirty air that has not entered the upper rear air outlet chamber 301 of the heat exchange core 4 is heat exchanged again with the outdoor fresh air that has entered the lower rear air inlet chamber 302 of the heat exchange core 4; and the outdoor fresh air that has not entered the upper front air outlet chamber 201 of the heat exchange core 4 is heat exchanged again with the indoor dirty air that has entered the lower front air outlet chamber 202 of the heat exchange core 4. With this design, heat exchange is carried out in every part of the body 1 of the present invention, saving energy and reducing consumption. At the same time, the internal operating temperature of the body 1 is balanced to prevent the occurrence of excessive local temperature of the body 1.

[0034] like Figure 4 and Figure 7As shown: a load-bearing strip 4111 is provided on the front sealing plate 411, a load-bearing strip 4111 is provided on the rear sealing plate 421, a "C"-shaped load-bearing sleeve 4112 is provided on the left and right sides of the heat exchange core 4, the load-bearing sleeve 4112 is clamped on the load-bearing strip 4111, and a rubber strip 4113 is provided in the load-bearing sleeve 4112, and positioning strips 4114 are provided on the upper and lower sides of the heat exchange core 4, and a rubber strip (not shown in the figure) is clamped on the positioning strip 4114, and the upper and lower inner walls of the body 1 are respectively fixedly attached with an upper top plate 101 and a lower top plate 102, and the upper top plate 101 and the lower top plate 102 are respectively in contact with the rubber strip 4113 located on the upper and lower sides of the heat exchange core 4, and the two ends of the heat exchange core 4 are sealed with the inner wall of the body 1, and the sealed connection is that the two ends of the heat exchange core 4 are in contact with the two inner walls of the body 1 and are applied with glass glue. Through the above design, the load-bearing of the heat exchange core 4 lies on the load-bearing strip 4111 and the load-bearing sleeve 4112, which is the central load-bearing. No matter it is installed on the front side or the back side, the rubber strips 4113 on both sides are respectively in contact with the upper top plate 101 and the lower top plate 102, and the rubber strips 4113 are in an extruded state. In this way, it is prevented that the existing heat exchange core 4 is loaded on both sides due to gravity. After being installed on the front side or the back side, the rubber strips 4113 on both sides will be easily deformed under the influence of the gravity of the heat exchange core 4, resulting in poor sealing effect, and the air in the inlet air duct and the outlet air duct are mixed (that is, the inlet air duct is connected to the outlet air duct), affecting the normal operation of the equipment.

[0035] like Figure 2 , Figure 4 and Figure 7 The heat exchange core 4 is provided with a front separation frame 41 and a rear separation frame 42 on both sides. The front separation frame 41 and the rear separation frame 42 are fixed on the body 1. The front separation frame 41 is provided with a front sealing plate 411, and the front sealing plate 411 is located below the center of the front separation frame 41. The front sealing plate 411 divides the front separation frame 41 into a front upper hole 412 and a front lower hole 413. The rear separation frame 42 is provided with a rear sealing plate 421, and the rear sealing plate 421 is located above the center of the rear separation frame 42. The rear sealing plate 421 divides the rear separation frame 42 into a rear upper hole 422 and a rear lower hole 423.

[0036] like Figure 4As shown: the first partition 2 includes a first front plate 21, a second front plate 22 and a third front plate 23. The horizontal height of the third front plate 23 is higher than that of the first front plate 21, because an exhaust fan 01 needs to be installed below the third front plate 23. In order to allow enough space for the exhaust fan 01 to be installed, the first front plate 21 is used to position the coarse filter and the electrostatic high-voltage package 9, so that the coarse filter and the electrostatic high-voltage package 9 have enough space for installation. The second front plate 22 is used for sealing. The two ends of the second front plate 22 are respectively connected to the first front plate 21 and the third front plate 23. The first front plate 21 is sealed and connected to the front sealing plate 411. The sealing connection can be welded or fixed by screws. After applying glass glue, the front sealing plate 411 is used to isolate the upper front air intake cavity 201 and the lower front air outlet cavity 202.

[0037] like Figure 4 As shown: the second partition 3 includes a first rear plate 31, a second rear plate 32 and a third rear plate 33. The horizontal height of the third rear plate 33 is higher than that of the first rear plate 31. Because the air intake fan 02 needs to be installed below the third rear plate 33, in order to allow enough space for the air intake fan 02 to be installed, the first rear plate 31 is used to position the fine filter so that the fine filter has enough space for installation. The second rear plate 32 is used for sealing. The two ends of the second rear plate 32 are respectively connected to the first rear plate 31 and the third rear plate 33. The first rear plate 31 is sealed with the rear sealing plate 421. The sealing connection can be welded or fixed by screws. After applying glass glue, the rear sealing plate 421 is used to isolate the upper rear air outlet cavity 301 and the lower rear air inlet cavity 302.

[0038] Through the above design, the body 1 of the present invention can be designed to be lighter and thinner, and its thickness is only the thickness of the heat exchange core 4 plus the thickness of the top plate 101, the lower top plate 102 and the wall thickness of the two sides of the body 1, without any other unnecessary wasted space and wasteful structure.

[0039] At the same time, through the above design, the third rear plate 33 and the third front plate 23 are designed to float, and the first rear plate 31 and the first front plate 21 are designed to sink, so that the sum of the volume of the upper front air inlet chamber 201 and the volume of the lower rear air inlet chamber 302 is not much different from the sum of the volume of the upper rear air outlet chamber 301 and the volume of the lower front air outlet chamber 202. Combined with the caliber of the front air inlet 11, the caliber of the front air outlet 12, the caliber of the rear air inlet 13 and the caliber of the rear air outlet 14 are the same, the air intake volume is close to the air outlet volume, and the equipment operation is more reasonable.

[0040] like Figure 4As shown: the third front plate 23 is provided with a first notch, and the third front plate 23 is in an "L" shape. The first front baffle plate 103 and the second front inclined plate 104 are provided in the body 1. The first front baffle plate 103 and the second front inclined plate 104 are connected, and are respectively sealed at the first notch, and the sealing connection is welding. In order to seal the third front plate 23 and the second front inclined plate 104, the first front baffle plate 103 is inclined along one side of the exhaust fan 01 and is sealed with the inner wall of the body 1, and the sealing connection is welding.

[0041] like Figure 4 As shown: the third rear plate 33 is provided with a second notch, and the first rear baffle plate 105 and the second rear inclined plate 106 are provided in the body 1, the first rear baffle plate 105 and the second rear inclined plate 106 are connected, and are sealed at the second notch respectively, and the sealing connection is welding. In order to seal the third rear plate 33 and the second rear inclined plate 106, the first rear baffle plate 105 is inclined along one side of the intake fan 02 and is sealed with the inner wall of the body 1, and the sealing connection is welding.

[0042] The above-mentioned design, the design of the second front inclined plate 104 and the second rear inclined plate 106, on the one hand, is to make the front air inlet 11, the front air outlet 12, the rear air inlet 13 and the rear air outlet 14 at the same horizontal height, and make the diameter of the front air inlet 11, the diameter of the front air outlet 12, the diameter of the rear air inlet 13 and the diameter of the rear air outlet 14 the same, so that the body 1 can be designed to be lighter and thinner, and the thickness of the body 1 is only the thickness of the heat exchange core 4 plus the thickness of the top plate 101, the lower top plate 102 and the wall thickness of both sides of the body 1; on the other hand, in order to guide the air inlet and outlet, the air inlet and outlet can be smoother with less resistance.

[0043] like Figure 7 As shown: the machine body 1 is provided with an upper plate 107, which is fixedly attached to the upper wall of the machine body 1, and a coarse filter (not shown in the figure) and an electrostatic high-voltage package 9 are arranged in sequence between the upper plate 107 and the first front plate 21, and the coarse filter and the electrostatic high-voltage package 9 are respectively limited by a plurality of "L"-shaped baffles 109 in cross-section, and the machine body 1 is provided with a lower plate 108, which is fixedly attached to the lower wall of the machine body 1, and a fine filter (not shown in the figure) is arranged between the first rear plate 31 and the lower plate 108, and the fine filter is limited by a plurality of "L"-shaped baffles 109 in cross-section.

[0044] Through the above design, the coarse filter, the electrostatic high-voltage package 9 and the fine filter are limited and fixed in multiple directions. The body 1 of the present invention is installed on the front or the back, and the coarse filter, the electrostatic high-voltage package 9 and the fine filter can all operate normally.

[0045] Of course, the above are only typical examples of the present invention. In addition, the present invention may also have many other specific implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. Slim design, full heat exchange and haze removal integrated machine, features: It comprises a closed body, in which a first partition, a second partition and a heat exchange core are arranged, the first partition divides the body into an upper front air inlet chamber and a lower front air outlet chamber for mutual heat exchange, the second partition divides the body into an upper rear air outlet chamber and a lower rear air inlet chamber for mutual heat exchange, the upper front air inlet chamber, the air inlet passage of the heat exchange core and the lower rear air inlet chamber constitute an inlet air passage, the lower front air outlet chamber, the air outlet passage of the heat exchange core and the upper rear air outlet chamber constitute an outlet air passage, the inlet air passage and the outlet air passage are inverted "X"-shaped heat exchange passages, an exhaust fan is arranged in the lower front air outlet chamber, and an air inlet fan is arranged in the lower rear air inlet chamber; A front separation frame and a rear separation frame are provided on both sides of the heat exchange core. The front separation frame is provided with a front sealing plate, which is located below the center of the front separation frame and divides the front separation frame into a front upper hole and a front lower hole. The rear separation frame is provided with a rear sealing plate, which is located above the center of the rear separation frame and divides the rear separation frame into a rear upper hole and a rear lower hole. The front sealing plate is provided with a load-bearing strip, the rear sealing plate is provided with a load-bearing strip, the left and right sides of the heat exchange core are provided with a "C"-shaped load-bearing sleeve, the load-bearing sleeve is clamped on the load-bearing strip, and a rubber strip is provided inside the load-bearing sleeve, and the upper and lower sides of the heat exchange core are provided with positioning strips, and the positioning strips are clamped with rubber strips, and the upper and lower insides of the body are respectively fixedly attached with an upper top plate and a lower top plate, and the upper top plate and the lower top plate are respectively in contact with the rubber strips located on the upper and lower sides of the heat exchange core, and the two ends of the heat exchange core are sealed and connected to the inner wall of the body; The first partition includes a first front plate, a second front plate and a third front plate, the third front plate has a higher level than the first front plate, two ends of the second front plate are respectively connected to the first front plate and the third front plate, and the first front plate is sealed to the front sealing plate; The second partition includes a first rear plate, a second rear plate and a third rear plate, the third rear plate has a higher level than the first rear plate, two ends of the second rear plate are respectively connected to the first rear plate and the third rear plate, and the first rear plate is sealed to the rear sealing plate; The third front plate is provided with a first notch, and the body is provided with a first front baffle plate and a second front inclined plate, the first front baffle plate and the second front inclined plate are connected and are respectively sealed at the first notch, and the second front inclined plate is inclined along one side of the exhaust fan and is sealed to the inner wall of the body; The third rear plate is provided with a second notch, and the body is provided with a first rear baffle plate and a second rear inclined plate, which are connected and sealed at the second notch respectively, and the second rear inclined plate is inclined along one side of the intake fan and sealed to the inner wall of the body.

2. The slim design, full heat exchange and haze removal integrated machine that can be used both in front and back according to claim 1, is characterized by: The first separator and the second separator have a thickness of 0.5 mm to 2 mm and are made of metal.

3. The slim design, full heat exchange and haze removal integrated machine that can be used both front and back according to claim 1, is characterized by: The machine body is provided with an upper plate, which is fixedly fitted to the upper wall of the machine body. A coarse filter and an electrostatic high-voltage package are arranged in sequence between the upper plate and the first front plate. The coarse filter and the electrostatic high-voltage package are respectively limited by a number of "L"-shaped baffles. The machine body is provided with a lower plate, which is fixedly fitted to the lower wall of the machine body. A fine filter is arranged between the first rear plate and the lower plate, and the fine filter is limited by a number of "L"-shaped baffles.

4. The slim design, full heat exchange and haze removal integrated machine that can be used both front and back according to claim 1, is characterized by: A front air inlet and a front air outlet are provided on one side of the machine body, and a rear air inlet and a rear air outlet are provided on the other side. The front air inlet, the front air outlet, the rear air inlet and the rear air outlet are located at the same horizontal height, and the calibers of the front air inlet, the front air outlet, the rear air inlet and the rear air outlet are the same.

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