CN216011050U - Energy-saving fan coil unit - Google Patents

Abstract

The utility model discloses an energy-saving fan coil unit which comprises a machine shell, an air return opening arranged on the machine shell, a first air outlet arranged on the machine shell, an air return device arranged in the machine shell, a filter screen arranged in the machine shell, a dust cleaning device arranged in the machine shell, a shaping device arranged on the machine shell, a surface air cooler arranged in the machine shell and a water outlet arranged on the surface air cooler. According to the utility model, through the arrangement of the transmission group and the scraper, the impurities such as dust and the like can be collected on the filter screen after the fan coil unit is used every time, so that the situation that the impurities such as dust and the like are completely adhered to the filter screen and are difficult to clean after the filter screen is filtered for a long time is avoided, meanwhile, the ventilation rate of the filter screen is ensured, and the energy consumption is reduced; the filter screen is shaped through the setting of the shaping device, so that the situation that the filter screen is deformed after being repeatedly scraped by the scraper is avoided; through the setting of isolation group, concentrate the isolation to the dust, prevent that the dust of collecting from scattering.

Description

Energy-saving fan coil unit

Technical Field

The utility model belongs to the technical field of fan coils, and particularly relates to an energy-saving fan coil unit.

Background

Fan-coil units are end devices of central air conditioning systems, which are typically installed in various rooms of buildings such as office buildings, hospitals, hotels, etc., and rely on an air-to-water heat exchange cycle system to regulate the conditions of air temperature, humidity, etc. in the rooms. The fan coil unit operates by circulating indoor air primarily by means of a fan forcing action, drawing air into the fan coil unit, which is then passed through and exchanges heat with either a cold water coil or a hot water coil to be cooled or heated, and finally discharged into the room to maintain the room at a desired temperature and relative humidity. Because fan-coil unit circulating air needs the return air, generally all filter the return air with the filter screen, when adsorbing more impurity on the filter screen, the ventilation rate greatly reduced of filter screen has increased the energy consumption.

SUMMERY OF THE UTILITY MODEL

The utility model provides an energy-saving fan coil unit for overcoming the defects of the prior art.

In order to achieve the purpose, the utility model adopts the following technical scheme: an energy-saving fan coil unit comprises a casing, an air return opening arranged on the casing, a first air outlet arranged on the casing, an air return device arranged in the casing, a filter screen arranged in the casing, a dust cleaning device arranged in the casing, a shaping device arranged on the casing, a surface cooler arranged in the casing and a water outlet arranged on the surface cooler; the method is characterized in that: the dust cleaning device comprises a transmission group arranged on the casing, a scraper arranged on the transmission group, a plurality of rollers arranged on the scraper, a separation blade arranged on the scraper, an ash deposition bin arranged on the casing, an isolation group arranged on the casing, a water collecting bin arranged on the casing, a water outlet pipe arranged on the water collecting bin and a stirring group arranged on the water collecting bin.

When the fan coil unit is started again, the isolation group is started, the stirring group is started accordingly, and impurities such as dust collected last time are mixed with the condensed water and then discharged from the water outlet pipe; through the arrangement of the transmission group and the scraper, the impurities such as dust and the like can be collected on the filter screen after the fan coil unit is used every time, so that the situation that the impurities such as dust and the like are completely adhered to the filter screen and are difficult to clean after the filter screen is filtered for a long time is avoided, meanwhile, the ventilation rate of the filter screen is ensured, and the energy consumption is reduced; the filter screen is shaped through the setting of the shaping device, so that the situation that the filter screen is extruded and deformed after being repeatedly scraped by the scraper is avoided; through the arrangement of the roller, the friction between the scraper and the inner wall of the shell is reduced, so that the abrasion of the inner wall of the shell is reduced; through the arrangement of the isolation groups, dust is isolated in a centralized manner, so that the collected dust is prevented from being dispersed; through the setting of separation blade for the dust of collection is concentrated in the deposition storehouse, avoids the foreign dust.

The transmission set comprises a pair of first supporting blocks arranged on the casing, a pair of second supporting blocks arranged on the casing, a first rotating shaft rotatably arranged on the pair of first supporting blocks, a second rotating shaft rotatably arranged on the pair of second supporting blocks, a motor arranged on the first rotating shaft, a pair of first synchronous belts sleeved outside the first rotating shaft and the second rotating shaft, and a baffle frame arranged on the first synchronous belts.

When the whole machine stops working, the motor is started, the motor drives the first rotating shaft to rotate, the first rotating shaft drives the second rotating shaft to rotate through the pair of first synchronous belts, the pair of first synchronous belts drives the scraper and the blocking piece to move, the scraper scrapes and extrudes the filter screen, the filter screen is stressed and deformed, and dust is ejected from the filter screen in the resetting process of the filter screen; through the arrangement of the pair of first synchronous belts, two ends of the scraper are fixed, and the filter screen can be stably collected; through the setting that keeps off the frame for the ash that the scraper blade was received down can not drop to first synchronous belt in, avoids causing the emergence of phenomenons such as synchronous belt skidding, has increased job stabilization nature.

The shaping device comprises a plurality of first circular grooves formed in the shell, a first cylinder arranged in the first circular grooves, a fixing strip arranged on the first cylinder, and a first spring used for connecting the first circular grooves and the fixing strip; the first cylinder is slidable within the first circular slot.

When the scraper plate extrudes and scrapes the filter screen, the filter screen deforms, the deformed filter screen drives the fixing strip to move, the fixing strip drives the first cylinder to move, when the scraper plate finishes extruding and scraping, the first cylinder resets, the first cylinder drives the fixing strip to move, and the fixing strip drives the filter screen to reset; through the setting of first spring for the filter screen can reset at once after finishing extrusion atress, reduces the deformation time of filter screen, and elasticity when the first spring resets has increaseed the elasticity when the filter screen resets simultaneously, makes the dust pop out from the filter screen more easily.

The isolation group comprises a second cylinder arranged on the casing, a first blade sleeved outside the second cylinder, a connecting rod arranged on the first blade, a third rotating shaft arranged on the connecting rod, a gear lacking on the third rotating shaft, a sliding groove arranged on the casing, a sliding rod arranged in the sliding groove, a rack arranged on the sliding rod, a sliding groove arranged on the casing, an isolation plate arranged in the sliding groove, a plurality of second springs used for connecting the casing and the isolation plate, a fourth rotating shaft arranged on the casing, a top plate arranged on the fourth rotating shaft and a gear arranged on the fourth rotating shaft; the gear lack is meshed with the rack, the rack is meshed with the gear, the isolation plate can slide in the sliding groove, and the sliding rod can slide in the sliding groove.

When the fan-coil unit starts to blow air, the air drives the blades to rotate, the blades drive the connecting rod to rotate, the connecting rod drives the third rotating shaft to rotate, the third rotating shaft drives the gear-lacking gear to rotate, the gear-lacking gear drives the rack to move, the rack drives the gear to rotate, the gear drives the fourth rotating shaft to rotate, the fourth rotating shaft rotates to the top plate, the top plate rotation cancels the limit, and the first spring drives the isolation plate to move; through the setting that lacks the gear for when the blade was blown by wind and is got turned angle great, also can not drive the rack and do too much removal, guaranteed that the gear only changes the half circle, thereby guaranteed that the top piece only changes the half circle, the division board only has an action at every turn, and can not be always the removal of relapseing from top to bottom, guaranteed opening and closing of division board.

The stirring group comprises an air inlet arranged on the shell, a guide plate arranged on the air inlet, a notch arranged on the shell, a fifth rotating shaft arranged in the notch, a plurality of second blades arranged on the fifth rotating shaft, a sixth rotating shaft arranged in the notch, a second synchronous belt used for connecting the fifth rotating shaft and the sixth rotating shaft, a first bevel gear arranged on the sixth rotating shaft, a seventh rotating shaft arranged in the notch, a second bevel gear arranged on the seventh rotating shaft, a plurality of eighth rotating shafts arranged in the notch, a plurality of third blades arranged on the eighth rotating shaft and a third synchronous belt used for connecting the seventh rotating shaft and one of the eighth rotating shafts; the second bevel gear is meshed with the first bevel gear; and the two adjacent eighth rotating shafts are connected through a fourth synchronous belt in a transmission manner.

When the fan-coil unit is restarted, blowing air enters from the air inlet to drive the plurality of second blades to rotate, the second blades drive the fifth rotating shaft to rotate, the fifth rotating shaft drives the sixth rotating shaft to rotate through the second synchronous belt, the sixth rotating shaft drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the seventh rotating shaft to rotate, the seventh rotating shaft drives one eighth rotating shaft to rotate through the third synchronous belt, the eighth rotating shaft drives the adjacent eighth rotating shaft to rotate through the fourth synchronous belt, and the eighth rotating shaft drives the third blade to rotate; through the arrangement of the air inlet and the guide plate, air can enter the slot, and the second blade is driven to rotate by the blowing of the air, so that the power is saved, and the energy consumption is reduced; through the setting of eighth pivot and third blade, stir dust and comdenstion water for dust and comdenstion water can the intensive mixing, thereby when the comdenstion water was discharged, can take all dusts to discharge together.

The air return device comprises a double-shaft motor arranged on the air return port, a pair of centrifugal fans arranged on the double-shaft motor, a fixing plate used for connecting the shell and the centrifugal fans, a plurality of second air outlets arranged on the fixing plate, a plurality of first air guide pieces arranged on the second air outlets, and a plurality of second air guide pieces arranged on the second air outlets

When the fan-coil unit is started, the double-shaft motor is automatically started, the double-shaft motor drives the centrifugal fan to start, and air enters from the air return opening and is blown out from the second air outlet after passing through the centrifugal fan; through the arrangement of the first air guide plate and the second air guide plate, air blown out from the second air outlet can be uniformly blown off on the surface of the filter screen, the air is prevented from being intensively blown at a certain position of the filter screen, and therefore the filter screen can uniformly collect impurities such as dust in the air.

Compared with the prior art, the utility model has the following advantages: through the arrangement of the transmission group and the scraper, the impurities such as dust and the like can be collected on the filter screen after the fan coil unit is used every time, so that the situation that the impurities such as dust and the like are completely adhered to the filter screen and are difficult to clean after the filter screen is filtered for a long time is avoided, meanwhile, the ventilation rate of the filter screen is ensured, and the energy consumption is reduced; the filter screen is shaped through the setting of the shaping device, so that the situation that the filter screen is deformed after being repeatedly scraped by the scraper is avoided; through the setting of isolation group, concentrate the isolation to the dust, prevent that the dust of collecting from scattering.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a cross-sectional perspective view taken along a-a in fig. 2.

Fig. 4 is an enlarged schematic view of the structure at a in fig. 3.

Fig. 5 is an enlarged schematic view of the structure at B in fig. 4.

Fig. 6 is an enlarged schematic view of the structure at C in fig. 4.

Fig. 7 is a cross-sectional perspective view taken along line B-B of fig. 2.

Fig. 8 is an enlarged schematic view of the structure at D in fig. 7.

Fig. 9 is a cross-sectional perspective view taken along line C-C in fig. 2.

Fig. 10 is an enlarged view of the structure at E in fig. 9.

Fig. 11 is a partial structural schematic diagram of the present invention.

Fig. 12 is an enlarged view of the structure at F in fig. 11.

Fig. 13 is a right side view of the present invention.

Fig. 14 is a cross-sectional perspective view taken along D-D in fig. 13.

Fig. 15 is an enlarged view of the structure at G in fig. 14.

Fig. 16 is a cross-sectional perspective view taken along E-E in fig. 13.

Fig. 17 is an enlarged view of the structure at H in fig. 16.

Fig. 18 is an enlarged view of the structure at I in fig. 16.

Detailed Description

As shown in fig. 1-18, an energy-saving fan-coil unit comprises a casing 1, a return air inlet 2, a first air outlet 3, a return air device 4, a filter screen 5, a dust cleaning device 6, a shaping device 7, a surface cooler 8 and a water outlet 9; the air return opening 2 is arranged on the shell 1; the first air outlet 3 is arranged on the machine shell 1; the air return device 4 is arranged in the machine shell 1; the filter screen 5 is arranged in the casing 1, and the filter screen 5 is provided with a plurality of folding angles; the dust cleaning device 6 is arranged in the machine shell 1; the surface cooler 8 is in the prior art, and is not described herein again, and the surface cooler 8 is arranged in the casing 1; the water outlet 9 is arranged on the surface air cooler 8,

the dust cleaning device 6 comprises a transmission group 10, a scraper 22, a roller 23, a baffle 24, an ash deposition bin 25, an isolation group 11, a water collecting bin 12, a water outlet pipe 13 and a stirring group 14; the transmission set 10 is arranged on the machine shell 1; the scraping plate 22 is arranged on the transmission set 10; the number of the rollers 23 is a pair, and the rollers 23 can be rotatably arranged at two ends of the scraper 22; the baffle piece 24 is arranged on the scraper 22, and the baffle piece 24 can be bent and folded; the ash accumulation bin 25 is arranged on the machine shell 1; the isolation group 11 is arranged on the machine shell 1; the water collecting bin 12 is arranged on the machine shell 1; the water outlet pipe 13 is arranged on the water collecting bin 12; the stirring group 14 is arranged on the water collecting bin 12.

The transmission set 10 comprises a first supporting block 15, a second supporting block 16, a first rotating shaft 17, a second rotating shaft 18, a motor 19, a first synchronous belt 20 and a blocking frame 21; the number of the first supporting blocks 15 is a pair, and the first supporting blocks 15 are arranged on the machine shell 1; the number of the second supporting blocks 16 is a pair, and the second supporting blocks 16 are arranged on the machine shell 1; the first rotating shaft 17 is rotatably arranged on the pair of first supporting blocks 15; the second rotating shaft 18 is rotatably arranged on the pair of second supporting blocks 16; the motor 19 is the prior art, and is not described herein again, the motor 19 is disposed on the first rotating shaft 17, and the motor 19 is fixed to the housing 1; the number of the first synchronous belts 20 is a pair, and the first synchronous belts 20 are sleeved outside the first rotating shaft 17 and the second rotating shaft 18; the blocking frame 21 is disposed on the first timing belt 20.

The shaping device 7 comprises a first circular groove 26, a first cylinder 27, a fixing strip 28 and a first spring 29; the first circular grooves 26 are set in two groups and are respectively arranged on two sides of the machine shell 1, the number of the first circular grooves 26 in each group is the same as that of the folded angles of the filter screen 5, the first circular grooves 26 are in one-to-one correspondence, and the first circular grooves 26 are arranged on the machine shell 1; the first cylinder 27 is arranged in the first circular groove 26, and the first cylinder 27 can slide in the first circular groove 26; the fixing strip 28 is arranged on the first cylinder 27, and the fixing strip 28 is buckled with the folded angle buckle on the filter screen 5; the first spring 29 is used to connect the first circular groove 26 and the fixing bar 28.

The isolation group 11 comprises a second cylinder 30, a first blade 31, a connecting rod 32, a third rotating shaft 33, a gear 34, a sliding groove 35, a sliding rod 36, a rack 37, a sliding groove 38, an isolation plate 39, a second spring 40, a fourth rotating shaft 41, a top plate 42 and a gear 43; the second cylinder 30 is arranged on the machine shell 1; the first blade 31 is rotatably sleeved outside the second cylinder 30; the connecting rod 32 is arranged on the first blade 31; the third rotating shaft 33 is arranged on the connecting rod 32, and the third rotating shaft 33 is rotatably arranged on the machine shell 1; the third rotating shaft 33 is provided with a third gear 34; the sliding groove 35 is arranged on the machine shell 1; the slide rod 36 is arranged in the slide groove 35, and the slide rod can slide in the slide groove 35; the rack 37 is arranged on the sliding rod 36, and the rack 37 is meshed with the gear with the teeth 34; the sliding groove 38 is arranged on the machine shell 1; the isolation plate 39 is arranged in the sliding groove 38, and the isolation plate 39 can slide in the sliding groove 38; the number of the second springs 40 is a plurality, and the number can be arranged according to specific situations, and the second springs 40 are used for connecting the machine shell 1 and the isolation plate 39; the fourth rotating shaft 41 is rotatably arranged on the machine shell 1 in a penetrating way; the top plate 42 is arranged on the fourth rotating shaft 41, and the top plate 42 can be abutted against the isolation plate 39; the gear 43 is disposed on the fourth rotating shaft 41, and the gear 43 is engaged with the rack 37.

The stirring group 14 comprises an air inlet 44, a guide plate 45, a slot 46, a fifth rotating shaft 47, a second blade 48, a sixth rotating shaft 49, a second synchronous belt 50, a first bevel gear 51, a seventh rotating shaft 52, an eighth rotating shaft 54, a third blade 55 and a third synchronous belt 56; the air inlet 44 is arranged on the machine shell 1; the guide plate 45 is arranged on the air inlet 44; the slot 46 is arranged on the machine shell 1; the fifth rotating shaft 47 is rotatably embedded in the slot 46; the number of the second blades 48 is multiple, and the number of the second blades 48 can be arranged according to specific situations, and the second blades 48 are uniformly arranged on the fifth rotating shaft 47 at intervals; the sixth rotating shaft 49 is rotatably embedded in the slot 46; the second synchronous belt 50 is used for connecting the fifth rotating shaft 47 and the sixth rotating shaft 49; the first bevel gear 51 is arranged on the sixth rotating shaft 49; the seventh rotating shaft 52 is rotatably embedded in the slot 46; the second bevel gear 53 is arranged on the seventh rotating shaft 52, and the second bevel gear 53 is meshed with the first bevel gear 51; the number of the eighth rotating shafts 54 is multiple, and the number of the eighth rotating shafts 54 can be arranged according to specific situations, and the eighth rotating shafts 54 can be rotatably embedded in the slots 46; the number of the third blades 55 is multiple, and the number of the third blades 55 can be arranged according to specific situations, and the third blades 55 are uniformly arranged on the eighth rotating shaft 54 at intervals; the third synchronous belt 56 is used for connecting the seventh rotating shaft 52 and one of the eighth rotating shafts 54; and the two adjacent eighth rotating shafts 54 are in transmission connection through a fourth synchronous belt 63.

The air return device 4 comprises a double-shaft motor 57, a centrifugal fan 58, a fixing plate 59, a second air outlet 60, a first air guide sheet 61 and a second air guide sheet 62; the double-shaft motor 57 is the prior art, and is not described herein again, and the double-shaft motor 57 is arranged on the air return opening 2; the centrifugal fans 58 are in the prior art and are not described herein again, the number of the centrifugal fans 58 is a pair, and the centrifugal fans 58 are arranged at two ends of the dual-shaft motor 57; the fixing plate 59 is used for connecting the casing 1 and the centrifugal fan 58; the number of the second air outlets 60 is the same as that of the centrifugal fans 58, and the second air outlets 60 are arranged on the fixing plate 59; the number of the first air guiding sheets 61 is multiple, and the number of the first air guiding sheets 61 can be arranged according to specific situations, and the first air guiding sheets 61 are obliquely arranged on the second air outlet 60 relative to the fixing plate 59; the number of the second air guiding sheets 62 is the same as that of the first air guiding sheets 61, and the second air guiding sheets 62 are in one-to-one correspondence with the first air guiding sheets 61, the second air guiding sheets 62 are obliquely arranged on the second air outlet 60 relative to the first air guiding sheets 61, and the second air guiding sheets 62 are fixedly connected with the first air guiding sheets 61.

The specific implementation process is as follows: when the fan-coil unit is started, the double-shaft motor 57 is automatically started, the double-shaft motor 57 drives the centrifugal fan 58 to be started, air enters from the air return port 2, is blown out from the second air outlet 60 after passing through the centrifugal fan 58, air blown out from the second air outlet 60 is blown out from the first air outlet 3 through the filter screen 5 and the surface air cooler 8, so that condensed water is generated, the condensed water in the surface air cooler 8 is dripped into the water collecting bin 12 from the water outlet 9, when the whole unit stops working, the motor 19 is started, the motor 19 drives the first rotating shaft 17 to rotate, the first rotating shaft 17 drives the second rotating shaft 18 to rotate through the pair of first synchronous belts 20, the pair of first synchronous belts 20 drives the scraper 22 and the baffle 24 to move, the scraper 22 scrapes and extrudes the filter screen 5, the filter screen 5 is deformed by force, dust is ejected from the filter screen 5 in the resetting process of the filter screen 5, when the scraper 22 scrapes and scrapes the filter screen 5, the filter screen 5 is deformed, the deformed filter screen 5 drives the fixed bar 28 to move, the fixed bar 28 drives the first cylinder 27 to move, when the scraper 22 finishes extruding and scraping, the first cylinder 27 resets, the first cylinder 27 drives the fixed bar 28 to move, the fixed bar 28 drives the filter screen 5 to reset, when the fan-coil unit is restarted, the wind drives the blades to rotate, the blades drive the connecting rod 32 to rotate, the connecting rod 32 drives the third rotating shaft 33 to rotate, the third rotating shaft 33 drives the missing gear 34 to rotate, the missing gear 34 drives the rack 37 to move, the rack 37 drives the gear 43 to rotate, the gear 43 drives the fourth rotating shaft 41 to rotate, the fourth rotating shaft 41 rotates to the top plate 42, the top plate 42 rotates to cancel the limit, the first spring 29 drives the isolation plate 39 to move, meanwhile, air enters from the air inlet 44 to drive the plurality of second blades 48 to rotate, the second blades 48 drive the fifth rotating shaft 47 to rotate, the fifth rotating shaft 47 drives the sixth rotating shaft 49 to rotate through the second synchronous belt 50, the sixth rotating shaft 49 drives the first bevel gear 51 to rotate, the first bevel gear 51 drives the second bevel gear 53 to rotate, the second bevel gear 53 drives the seventh rotating shaft 52 to rotate, the seventh rotating shaft 52 drives one eighth rotating shaft 54 to rotate through the third synchronous belt 56, the eighth rotating shaft 54 drives the adjacent eighth rotating shaft 54 to rotate through the fourth synchronous belt 63, the eighth rotating shaft 54 drives the third blade 55 to rotate, impurities such as dust and the like collected last time are mixed with the condensate water, and the impurities such as the dust and the condensate water are discharged from the water outlet pipe 13 after mixing.

While there have been shown and described what are at present considered the fundamental principles and essential features of the utility model and its advantages, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (6)

1. An energy-saving fan coil unit comprises a machine shell (1), a return air inlet (2) arranged on the machine shell (1), a first air outlet (3) arranged on the machine shell (1), a return air device (4) arranged in the machine shell (1), a filter screen (5) arranged in the machine shell (1), a dust cleaning device (6) arranged in the machine shell (1), a shaping device (7) arranged on the machine shell (1), a surface air cooler (8) arranged in the machine shell (1) and a water outlet (9) arranged on the surface air cooler (8); the method is characterized in that: the dust cleaning device (6) comprises a transmission group (10) arranged on the casing (1), a scraper (22) arranged on the transmission group (10), a plurality of rollers (23) arranged on the scraper (22), a baffle (24) arranged on the scraper (22), an ash deposition bin (25) arranged on the casing (1), an isolation group (11) arranged on the casing (1), a water collecting bin (12) arranged on the casing (1), a water outlet pipe (13) arranged on the water collecting bin (12) and a stirring group (14) arranged on the water collecting bin (12).

2. An energy efficient fan coil unit as set forth in claim 1 wherein: the transmission set (10) comprises a pair of first supporting blocks (15) arranged on the machine shell (1), a pair of second supporting blocks (16) arranged on the machine shell (1), a first rotating shaft (17) rotatably arranged on the pair of first supporting blocks (15), a second rotating shaft (18) rotatably arranged on the pair of second supporting blocks (16), a motor (19) arranged on the first rotating shaft (17), a pair of first synchronous belts (20) sleeved outside the first rotating shaft (17) and the second rotating shaft (18), and a blocking frame (21) arranged on the first synchronous belts (20).

3. An energy efficient fan coil unit as set forth in claim 1 wherein: the shaping device (7) comprises a plurality of first circular grooves (26) arranged on the machine shell (1), a first cylinder (27) arranged in the first circular grooves (26), a fixing strip (28) arranged on the first cylinder (27), and a first spring (29) used for connecting the first circular grooves (26) and the fixing strip (28).

4. An energy efficient fan coil unit as set forth in claim 1 wherein: the isolation group (11) comprises a second cylinder (30) arranged on the casing (1), a first blade (31) sleeved outside the second cylinder (30), a connecting rod (32) arranged on the first blade (31), a third rotating shaft (33) arranged on the connecting rod (32), a gear (34) arranged on the third rotating shaft (33), a sliding groove (35) arranged on the casing (1) and a sliding rod (36) arranged in the sliding groove (35), the gear rack type sliding device comprises a rack (37) arranged on a sliding rod (36), a sliding chute (38) arranged on a machine shell (1), a partition plate (39) arranged in the sliding chute (38), a plurality of second springs (40) used for connecting the machine shell (1) and the partition plate (39), a fourth rotating shaft (41) arranged on the machine shell (1), a top plate (42) arranged on the fourth rotating shaft (41), and a gear (43) arranged on the fourth rotating shaft (41).

5. An energy efficient fan coil unit as set forth in claim 1 wherein: the stirring group (14) comprises an air inlet (44) arranged on the machine shell (1), a guide plate (45) arranged on the air inlet (44), a slot (46) arranged on the machine shell (1), a fifth rotating shaft (47) arranged in the slot (46), a plurality of second blades (48) arranged on the fifth rotating shaft (47), a sixth rotating shaft (49) arranged in the slot (46), and a second synchronous belt (50) used for connecting the fifth rotating shaft (47) and the sixth rotating shaft (49), the gear transmission mechanism comprises a first bevel gear (51) arranged on a sixth rotating shaft (49), a seventh rotating shaft (52) arranged in a slot (46), a second bevel gear (53) arranged on the seventh rotating shaft (52), a plurality of eighth rotating shafts (54) arranged in the slot (46), a plurality of third blades (55) arranged on the eighth rotating shafts (54), and a third synchronous belt (56) used for connecting the seventh rotating shaft (52) and one of the eighth rotating shafts (54).

6. An energy efficient fan coil unit as set forth in claim 1 wherein: the air return device (4) comprises a double-shaft motor (57) arranged on the air return opening (2), a pair of centrifugal fans (58) arranged on the double-shaft motor (57), a fixing plate (59) used for connecting the shell (1) and the centrifugal fans (58), a plurality of second air outlets (60) arranged on the fixing plate (59), a plurality of first air guide sheets (61) arranged on the second air outlets (60), and a plurality of second air guide sheets (62) arranged on the second air outlets (60).

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