Air energy cooling and heating all-in-one machine

Abstract

The air energy cooling and heating all-in-one machine comprises an all-in-one machine body and a dust removal assembly, the dust removal assembly comprises extension frames, the extension frames are fixedly arranged on the side wall of the all-in-one machine body in a grouped and protruding mode and located on the two sides of an air net, and dust collection boxes are movably arranged on the inner sides of the extension frames in the longitudinal direction; a dust removal block is arranged at the end, close to the air net, of the dust collection box, and a net wiper abutting against the side wall is arranged on the dust removal block. The dust removal block is hollow and is communicated with the interior of the dust collection box, and a plurality of dust collection holes communicated with the interior of the dust removal block are formed in the side wall, provided with the net eraser, of the dust removal block. According to the dust removal assembly, in the up-down sliding process of the dust collection box, a net wiper physically wipes the surface of an air net, meanwhile, a first fan or a second fan operates to enable negative pressure to be formed in the dust collection box, dust is immediately sucked into the dust collection box through dust suction holes after being wiped down, the collaborative dust removal mode of'wiping and sucking at the same time 'is achieved, and periodic cleaning is achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of air-cooled and air-heated integrated machines, and particularly relates to an air-cooled and air-heated integrated machine. BACKGROUND

[0002] As a high-efficiency and energy-saving heat pump device, the air-cooled and air-heated integrated machine realizes the absorption and release of heat energy in air through an internal compressor, a heat exchanger and a fan system. In the running process, the device needs to continuously exchange air, so the side wall of the shell is usually provided with a wind net for air inlet or air outlet, which also plays a protective role of preventing foreign matters from entering the machine body.

[0003] However, in the long-term use process, the surface of the wind net is prone to accumulate dust, lint, pollen and other particulate matters, which reduces the ventilation area and increases the wind resistance, thereby affecting the air circulation efficiency and reducing the heat exchange performance. In severe cases, it may even cause overheating of the device, increase in energy consumption or abnormal noise of the fan. At present, the cleaning of the wind net of most air-cooled and air-heated integrated machines is still regular disassembly and cleaning, which is complicated, time-consuming and laborious. SUMMARY

[0004] In view of the problems in the prior art, the application provides the following technical scheme. The application provides an air-cooled and air-heated integrated machine, which comprises: An integrated machine body, a wind net is fixedly embedded on the side wall of the integrated machine body; A dust removal assembly, the dust removal assembly comprises an extension frame, the extension frame is fixedly and protrudingly arranged on the side wall of the integrated machine body and located at both sides of the wind net, a dust collection box is movably arranged on the inner side of the extension frame in the longitudinal direction, a dust removal block is arranged at one end of the dust collection box close to the wind net, and a net wiper abutting against the side wall is arranged on the dust removal block; The dust removal block is hollow and connected with the inside of the dust collection box, and a plurality of dust suction holes are arranged on the side wall of the dust removal block connected with the inside of the dust removal block; A fan one and a fan two are rotatably arranged in the inside of the dust collection box, and the inside of the dust collection box forms a negative pressure when the fan one and the fan two rotate, so that the dust removed by the net wiper enters the inside of the dust collection box through the dust suction holes; The dust removal assembly further comprises a driving part one and a driving part two for driving the fan one and the fan two to rotate respectively, the driving part one works and drives the fan one to rotate when the dust collection box moves upwards, and the driving part two works and drives the fan two to rotate when the dust collection box moves downwards.

[0005] As a preferred technical scheme of the above technical scheme, the net wiper is a plurality of spaced-apart strips.

[0006] As a preferred form of the above technical solution, the telescopic rods on both sides of the dust collecting box are arranged close to the two ends of the extension frame, vertical guide strips are arranged on the extension frame close to the telescopic rods on the side, and the ends of the telescopic rods are embedded in the guide grooves of the vertical guide strips, so that the dust collecting box can only slide vertically. When the telescopic rod on the side where the first fan is located is in the contracted state and the telescopic rod on the other side is in the stretched state, the driving member one is operated by the action of the dust collecting box, and the first fan rotates. When the telescopic rod on the side where the second fan is located is in the contracted state and the telescopic rod on the other side is in the stretched state, the driving member two is operated by the action of the dust collecting box, and the second fan rotates.

[0007] As a preferred form of the above technical solution, the driving member one comprises a rotating shaft one rotatably arranged in the dust collecting box and a belt pulley one respectively sleeved on the outside of the mounting shaft of the first fan and the outside of the rotating shaft one, a same belt one is sleeved on the belt pulley one, one end of the rotating shaft one extends out of the dust collecting box and a gear one is fixedly sleeved on the end, a vertical rack one is arranged on the extension frame on the side and corresponds to the position of the gear one, when the telescopic rod on the side where the first fan is located is in the contracted state, the gear one is engaged with the rack one, when the dust collecting box goes up, the rack one continuously rotates the gear one, and the first fan is continuously rotated by the belt one to form negative pressure in the dust collecting box.

[0008] As a preferred form of the above technical solution, the driving member two comprises a rotating shaft two rotatably arranged in the dust collecting box and a belt pulley two respectively sleeved on the outside of the mounting shaft of the second fan and the outside of the rotating shaft two, a same belt two is sleeved on the belt pulley two, one end of the rotating shaft two extends out of the dust collecting box and a gear two is fixedly sleeved on the end, a vertical rack two is arranged on the extension frame on the side and corresponds to the position of the gear two, when the telescopic rod on the side where the second fan is located is in the contracted state, the gear two is engaged with the rack two, when the dust collecting box goes down, the rack two continuously rotates the gear two, and the second fan is continuously rotated by the belt two to form negative pressure in the dust collecting box.

[0009] As a preferred form of the above technical solution, the bottom plate of the dust collecting box is hingedly arranged on the side plate, a magnet one is arranged on the top of one end away from the hinged end, a magnet two is fixedly arranged on the outer wall of the side plate of the dust collecting box, the magnet one can be attracted to the magnet two, and the magnet one can be separated from the magnet two under the action of an external force.

[0010] As a preferred form of the above technical solution, the side wall of the all-in-one machine body provided with the air net is further provided with an indicating arrow one, the indicating arrow one is an up arrow indicating mark, and is arranged on one side of the position where the first fan is located.

[0011] As the preferred technical scheme of the above, the side wall of the all-in-one machine body provided with the air net is further provided with an indicating arrow II, and the indicating arrow II is a downward indicating mark and is arranged at one side of the position of the fan II.

[0012] The beneficial effects of the present application are: The dust removal assembly is provided, the dust removal block is hollow and communicates with the dust collection box, one side of the net wiper is provided with a plurality of dust suction holes communicating with the inside, during the up-down sliding of the dust collection box, the net wiper physically wipes the surface of the air net, at the same time, the fan I or the fan II operates to form negative pressure in the inside of the dust collection box, the dust wiped off is immediately sucked into the inside of the dust collection box through the dust suction holes, the cooperative dust removal mode of "wiping and sucking at the same time" is realized, periodic cleaning is realized, dust can be effectively prevented from long-term accumulation on the surface of the air net, the ventilation area and air flow are kept smooth, wind resistance is reduced, heat exchange efficiency is improved, problems such as energy consumption increase, refrigeration / heating performance attenuation and fan overload caused by wind volume decrease are avoided, and the service life of the equipment is prolonged.

[0013] (2) The dust removal assembly is provided, the fan I and the fan II are driven by the driving member I and the driving member II respectively, and the driving action is triggered by the meshing of the gear I and the rack I and the gear II and the rack II through the compression state of the telescopic rod during the sliding of the dust collection box. The structure converts the linear sliding motion of the dust collection box into fan rotating power, completely relies on mechanical linkage to complete energy transmission, does not need additional motors or electric control modules, not only reduces energy consumption, but also improves the operation reliability of the system in harsh environments such as high humidity and high temperature. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A front view schematic diagram of the all-in-one air conditioner in the embodiment is shown; Figure 2 A top view schematic diagram of the all-in-one air conditioner in the embodiment is shown; Figure 3 A side view schematic diagram of the all-in-one air conditioner in the embodiment is shown; Figure 2 A sectional view schematic diagram of the dust removal assembly in the embodiment is shown; Figure 4 A schematic diagram of the cooperation of the dust collection box and the dust removal block in the embodiment (side view perspective) is shown; Figure 5 A sectional view schematic diagram of the cooperation of the dust collection box and the dust removal block in the embodiment is shown; Figure 4 Figure 6 A sectional view schematic diagram of the cooperation of the dust collection box and the dust removal block in the embodiment is shown; Figure 5 A structure enlarged schematic diagram of C in the embodiment is shown; ​Attached reference numerals: 1. Main body of the integrated unit; 2. Air vent; 10. Extension frame; 11. Vertical guide bar; 20. Dust collection box; 21. Telescopic rod; 22. Base plate; 23. Magnet one; 24. Magnet two; 30. Dust removal block; 31. Mesh wiper; 32. Suction hole; 40. Fan one; 50. Fan two; 61. Shaft one; 62. Belt one; 63. Gear one; 64. Rack one; 71. Shaft two; 72. Belt two; 73. Gear two; 74. Rack two; 80. Indicating arrow one; 90. Indicating arrow two. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0016] Example like Figure 1 , Figure 2 As shown, Figure 1 The diagram shown is a front view of the integrated heating and cooling unit in the embodiment. Figure 2 The diagram shown is a top view of the integrated heating and cooling unit in the embodiment. This device includes: The main body 1 of the integrated unit has a wind net 2 fixedly embedded on its side wall; The dust removal assembly includes an extension frame 10, which is fixedly protruding from the side wall of the main body 1 of the integrated machine and located on both sides of the air network 2. A dust collection box 20 is movably arranged longitudinally on the inner side of the extension frame 10. A dust removal block 30 is provided at one end of the dust collection box 20 near the air network 2, and a mesh wiper 31 that abuts against the side wall is provided on the dust removal block 30.

[0017] The main body 1 of the integrated unit includes key components such as the air source system compressor, heat exchanger, and fan. The air mesh 2 is used for air intake or exhaust and also serves as a protective measure to prevent foreign objects from entering the interior. The dust removal component can automatically clean the surface of the air mesh 2 to maintain smooth ventilation and ensure the operating efficiency of the equipment.

[0018] The extension frame 10 serves as a support and guide, providing an installation track for the dust collection box 20 and the dust removal block 30. The dust collection box 20 can slide up and down, and the dust removal block 30 moves up and down with the dust collection box 20. The mesh wiper 31 directly contacts the surface of the air mesh 2 and removes dust through friction.

[0019] like Figure 3 , Figure 4 , Figure 5 As shown, Figure 3 What is shown is Figure 2 A cross-sectional view of the dust removal component. Figure 4 The diagram shown is a side view of the dust collection box and the dust removal block in an embodiment. Figure 5 What is shown isFigure 4 A cross-sectional view of the dust collecting box cooperating with the dust removing block; The dust removing block 30 is hollow inside and communicates with the inside of the dust collecting box 20, and the side wall of the dust removing block 30 is provided with a plurality of dust suction holes 32 communicating with the inside of the dust removing block 30. The fan one 40 and the fan two 50 are rotatably arranged in the inside of the dust collecting box 20, and when the fan one 40 and the fan two 50 rotate, a negative pressure is formed in the inside of the dust collecting box 20, so that the dust wiped off by the wiper 31 enters the inside of the dust collecting box 20 from the dust suction holes 32. The dust removing assembly further comprises a driving member one and a driving member two for driving the fan one 40 and the fan two 50 to rotate respectively, and the driving member one works and drives the fan one 40 to rotate when the dust collecting box 20 moves upward, and the driving member two works and drives the fan two 50 to rotate when the dust collecting box 20 moves downward.

[0020] Specifically, the wiper 31 is a strip arranged at intervals and does not interfere with the position of the dust suction hole 32.

[0021] The dust removing block 30 is hollow inside and communicates with the inside of the dust collecting box 20, forming an air flow channel. And through the plurality of dust suction holes 32 arranged, it is ensured that the dust wiped off can be immediately sucked into the inside of the dust collecting box 20 for collection, realizing synchronous wiping and dust suction.

[0022] The fan one 40 is driven to operate by the driving member one when the dust collecting box 20 moves upward.

[0023] The fan two 50 is driven to operate by the driving member two when the dust collecting box 20 moves downward.

[0024] The dust collecting box 20 is provided with telescopic rods 21 near both ends close to the extension frame 10, and the extension frame 10 is provided with vertical guide strips 11 near the positions of the telescopic rods 21 on the side, and the ends of the telescopic rods 21 are embedded in the guide grooves of the vertical guide strips 11, so that the dust collecting box 20 can only slide vertically.

[0025] When the telescopic rod 21 on the side where the fan one 40 is located is in a contracted state, the telescopic rod 21 on the other side is in an extended state, the dust collecting box 20 moves upward to make the driving member one work, and the fan one 40 rotates, When the telescopic rod 21 on the side where the fan two 50 is located is in a contracted state, the telescopic rod 21 on the other side is in an extended state, the dust collecting box 20 moves downward to make the driving member two work, and the fan two 50 rotates.

[0026] The telescopic rod 21 and the guide groove of the vertical guide strip 11 are embedded in sliding cooperation, so that the dust collecting box 20 can slide vertically and will not be separated, and the stability of the telescopic rod 21 in the contracted state can be maintained.

[0027] The side where the fan one 40 is located means Figure 1 , Figure 2The side where fan 2.50 is located (A side) refers to... Figure 1 , Figure 2 Side B in the middle.

[0028] By manually applying external force to the dust collection box 20, one side of the telescopic rod 21 can be retracted, while the other side's telescopic rod 21 is extended. When the telescopic rod 21 on the side where the fan 40 is located is manually retracted, pushing the dust collection box 20 upwards synchronizes the scraping and vacuuming actions, achieving dust removal. After the dust collection box 20 reaches its highest position, applying external force to it retracts the telescopic rod 21 on the side where the fan 50 is located. Pushing the dust collection box 20 downwards again synchronizes the scraping and vacuuming actions, achieving dust removal once more.

[0029] The driving component includes: a rotating shaft 61 rotatably mounted inside the dust collection box 20 and pulleys respectively sleeved on the outside of the mounting shaft of the fan 40 and the outside of the rotating shaft 61. The pulleys are fitted with the same belt 62. One end of the rotating shaft 61 extends out of the dust collection box 20 and a gear 63 is fixedly fitted on that end. A rack 64 extending vertically is provided on the extension frame 10 on the same side and at the position corresponding to the gear 63. When the telescopic rod 21 on the side where the fan 40 is located is in the retracted state, the gear 63 meshes with the rack 64. When the dust collection box 20 moves upward, the rack 64 causes the gear 63 to rotate continuously, and drives the fan 40 to rotate continuously through the belt 62, forming a negative pressure inside the dust collection box 20.

[0030] The second driving component includes: a rotating shaft 71 rotatably installed inside the dust collection box 20 and pulleys 71 respectively sleeved on the outside of the mounting shaft of the fan 50 and the outside of the rotating shaft 71. The pulleys 71 are fitted with the same belt 72. One end of the rotating shaft 71 extends out of the dust collection box 20 and a gear 73 is fixedly fitted on that end. A rack 74 extending vertically is provided on the extension frame 10 on the same side and at the position corresponding to the gear 73. When the telescopic rod 21 on the side of the fan 50 is in the retracted state, the gear 73 meshes with the rack 74. When the dust collection box 20 moves downward, the rack 74 causes the gear 73 to rotate continuously, and drives the fan 50 to rotate continuously through the belt 72, forming a negative pressure inside the dust collection box 20.

[0031] like Figure 5 , Figure 6 As shown, Figure 5 What is shown is Figure 4 A cross-sectional view of the dust collection box and the dust collector block in action; Figure 6 What is shown is Figure 5 Enlarged schematic diagram of the structure at point C; The bottom plate 22 of the dust collecting box 20 is hingedly arranged on the side plate, and a magnet one 23 is arranged on the top of the end away from the hinged end. The side plate outer wall of the dust collecting box 20 is fixedly provided with a magnet two 24. The magnet one 23 can be attracted to the magnet two 24, and under the action of an external force, the magnet one 23 can be separated from the magnet two 24.

[0032] In the normal state, the bottom plate 22 closes the bottom of the dust collecting box 20, and the dust is stably stored in the box without leakage risk. When it is necessary to clean the dust in the box, the user uses fingers or small tools to pry the free end of the bottom plate 22 downward, at this time the magnetic attraction is overcome, so that the magnet one 23 is separated from the magnet two 24, and the bottom plate 22 is turned downward around the hinged shaft, and the dust in the dust collecting box 20 automatically slides and falls under the action of gravity. After cleaning, the bottom plate 22 is lifted to reset, and the magnets are automatically attracted to realize resealing.

[0033] As shown in Figure 1 , Figure 1 The figure shows the front view of the cold and warm all-in-one machine in the embodiment The side wall of the all-in-one machine body 1 provided with the air net 2 is further provided with an indication arrow one 80 and an indication arrow two 90. The indication arrow one 80 is an upward indication mark, arranged on one side of the position of the fan one 40. The indication arrow two 90 is a downward indication mark, arranged on one side of the position of the fan two 50.

[0034] The indication arrow one 80 (upward indication mark) indicates the running direction of the dust collecting box sliding upward, and the indication arrow two 90 (downward indication mark) indicates the running direction of the dust collecting box sliding downward.

[0035] Working principle: in the initial state, the dust collecting box 20 is located at the lower side, and the telescopic rod 21 on the side (A side) where the fan one 40 is located is compressed, the gear one 63 and the rack one 64 are in meshing state, and the telescopic rod 21 on the other side (B side) is in stretched state, the rack two 74 and the gear two 73 are in non-meshing state. At this time, the dust collecting box 20 is pushed upward by an external force (in the direction indicated by the indication arrow one 80, during the upward movement of the dust collecting box 20, the gear one 63 rolls on the rack one 64 and continuously rotates, drives the fan one 40 to rotate through the belt one 62, and the fan one 40 operates to form negative pressure in the dust collecting box 20. The dust removing block 30 at the front end of the dust collecting box 20 moves with it, and the net wipe 31 on it closely wipes the surface of the air net 2, and the dust wiped off is sucked into the dust collecting box 20 through the dust suction hole 32 on the side wall of the dust removing block 30 and collected in the hollow channel in the dust removing block 30.

[0036] When the dust collecting box 20 reaches the top, an external force is applied to the dust collecting box 20, so that the telescopic rod 21 on the side (B side) where the fan 2 50 is located is in a contracted state. At this time, the gear 1 63 is separated from the rack 1 64, and the rack 2 74 is in meshing state with the gear 2 73. Then the external force pushes it to slide downward (in the direction indicated by the arrow 2 90), and the gear 2 73 rolls and rotates on the rack 2 74. The belt 2 72 drives the fan 2 50 to rotate, and continues to form negative pressure in the dust collecting box 20. The screen wiper 3 1 wipes the surface of the air screen 2 again, and the dust is sucked into the dust collecting box 20 through the dust suction hole 3 2, so as to realize synchronous dust removal in the downward direction.

[0037] When the dust collecting box 20 is full of dust, the user applies an external force to pry the free end of the bottom plate 22 downward, separates the magnet 1 23 from the magnet 2 24 by overcoming the magnetic attraction, and opens the bottom plate 22 by turning downward around the hinge point. The internal dust is automatically discharged under the action of gravity, and after cleaning, the bottom plate 22 is reset, the magnet 1 23 is attracted to the magnet 2 24, and the sealing state is restored, preparing for the next dust removal.

[0038] The above examples are only used to illustrate the technical solutions of the present application, and not to limit them.

Claims

1. Air energy heating and cooling all-in-one machine, characterized in that, The utility model relates to a dust removal device of air conditioner, including: Integrated machine body (1), the side wall of integrated machine body (1) is fixedly embedded with wind net (2); Dust removal assembly, the extension frame (10) is fixedly projected in group and is located the both sides position of wind net (2) on the side wall of integrated machine body (1), the extension frame (10) is movably arranged with dust collection box (20) in the inside along the longitudinal direction, the dust collection box (20) is provided with dust removal block (30) near the end of wind net (2), the dust removal block (30) is provided with the net wipe (31) of the side wall of the abutment of the dust removal block (30); The dust removal block (30) is hollow and is communicated with the inside of dust collection box (20), the side wall of the dust removal block (30) is provided with a plurality of dust suction holes (32) communicated with the inside of dust removal block (30) on the side wall of the dust removal block (30) provided with net wipe (31); The fan one (40) and the fan two (50) are rotatably arranged in the inside of dust collection box (20), when the fan one (40) and the fan two (50) rotate, the inside of dust collection box (20) forms negative pressure, makes the dust of net wipe (31) fall from dust suction hole (32) into the inside of dust collection box (20); The dust removal assembly further includes drive part one and drive part two for driving the fan one (40) and the fan two (50) to rotate respectively, drive part one works and drives the fan one (40) to rotate in the ascending process of dust collection box (20), drive part two works and drives the fan two (50) to rotate in the descending process of dust collection box (20).

2. The air energy heating and cooling all-in-one machine of claim 1, wherein, The net wipe (31) is a plurality of interval distribution's strip.

3. The air energy heating and cooling all-in-one machine of claim 1, wherein, The dust collection box (20) is provided with telescopic rod (21) near both ends of extension frame (10), the extension frame (10) is provided with vertical guide strip (11) near the position of telescopic rod (21) on the side, the end of telescopic rod (21) is embedded in the guide groove of vertical guide strip (11), so that the dust collection box (20) can only slide along the vertical direction; When the telescopic rod (21) on the side of the fan one (40) is in the state of contraction, the telescopic rod (21) on the other side is in the state of stretching, the dust collection box (20) acts to make drive part one work, and the fan one (40) rotates; When the telescopic rod (21) on the side of the fan two (50) is in the state of contraction, the telescopic rod (21) on the other side is in the state of stretching, the dust collection box (20) acts to make drive part two work, and the fan two (50) rotates.

4. The air energy heating and cooling all-in-one machine according to claim 3, characterized by, The driving part one comprises: a rotating shaft one (61) rotatingly installed inside the dust collecting box (20) and a belt pulley one respectively sleeved outside the installation shaft of the fan one (40) and outside the rotating shaft one (61), a same belt one (62) is sleeved on the belt pulley one, one end of the rotating shaft one (61) extends outside the dust collecting box (20) and a gear one (63) is fixedly sleeved on the end, a vertical extending rack one (64) is arranged on the extending frame (10) on the side of the gear one (63), when the telescopic rod (21) on the side of the fan one (40) is in the contracted state, the gear one (63) is engaged with the rack one (64), when the dust collecting box (20) goes up, the rack one (64) continuously rotates the gear one (63), and the fan one (40) is continuously driven to rotate in the dust collecting box (20) by the belt one (62) to form negative pressure.

5. The air energy heating and cooling all-in-one machine according to claim 4, characterized by, The driving part two comprises: a rotating shaft two (71) rotatingly installed inside the dust collecting box (20) and a belt pulley two respectively sleeved outside the installation shaft of the fan two (50) and outside the rotating shaft two (71), a same belt two (72) is sleeved on the belt pulley two, one end of the rotating shaft two (71) extends outside the dust collecting box (20) and a gear two (73) is fixedly sleeved on the end, a vertical extending rack two (74) is arranged on the extending frame (10) on the side of the gear two (73), when the telescopic rod (21) on the side of the fan two (50) is in the contracted state, the gear two (73) is engaged with the rack two (74), when the dust collecting box (20) goes down, the rack two (74) continuously rotates the gear two (73), and the fan two (50) is continuously driven to rotate in the dust collecting box (20) by the belt two (72) to form negative pressure.

6. The air energy heating and cooling all-in-one machine of claim 1, wherein, The bottom plate (22) of the dust collecting box (20) is hingedly arranged on the side plate, and a magnet one (23) is arranged on the top of one end away from the hinged end, the magnet two (24) is fixedly arranged on the outer wall of the side plate of the dust collecting box (20), the magnet one (23) can be attracted to the magnet two (24), and the magnet one (23) can be separated from the magnet two (24) under the action of an external force.

7. The air energy heating and cooling all-in-one machine of claim 1, wherein, The side wall of the all-in-one machine body (1) provided with the air net (2) is further provided with an indicating arrow one (80), the indicating arrow one (80) is an upgoing indicating mark, and is arranged on one side of the position of the fan one (40).

8. The air energy heating and cooling all-in-one machine according to claim 1 or 7, characterized by, The side wall of the all-in-one machine body (1) provided with the air net (2) is further provided with an indicating arrow two (90), the indicating arrow two (90) is a downgoing indicating mark, and is arranged on one side of the position of the fan two (50).

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