CN217031561U

CN217031561U - Total heat exchanger

Info

Publication number: CN217031561U
Application number: CN202220684713.4U
Authority: CN
Inventors: 赵玉垒; 张恒; 王涛
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-07-22
Anticipated expiration: 2032-03-28

Abstract

The utility model proposes a total heat exchanger, comprising: a casing on which a tuyere is formed; a damper, which is arranged at the tuyere and has a closed state of closing the tuyere and an open state of opening the tuyere; the damper comprises: a mounting frame, which is connected to On the casing and at the air outlet, the installation frame has a mounting plate, and the installation plate is provided with a ventilation opening that penetrates the installation plate and corresponds to the air outlet; the movable windshield is arranged on one side of the installation plate; the rack is vertically installed on the The teeth on the movable windshield and above it face the side of the movable windshield away from the installation plate; the gear is engaged with the rack; the driving mechanism is connected to the installation frame and connected with the gear, and the driving mechanism drives the gear to rotate to drive the rack Moving up and down, the rack drives the movable windshield to move up and down to open the vent to keep the damper open or close the vent to keep the damper closed; the damper has a compact structure and can also be opened and closed in a small space, taking up little space. Makes the size of the total heat exchanger smaller.

Description

Total heat exchanger

Technical Field

The utility model belongs to the technical field of air conditioners, and particularly relates to a total heat exchanger.

Background

In order to meet the market demand in the field of fresh air and strengthen the competitiveness with competitive products, the total heat exchanger needs to have a bypass function, and an air door mechanism is developed and designed to realize ventilation mode conversion.

The air door of the total heat exchanger comprises a bypass air door and an internal circulation air door: (1) the bypass exchange mode is started through the intelligent controller, the bypass air door is opened, external circulation is achieved, specifically, when the outdoor temperature is more comfortable, ventilation is directly conducted, return air is exhausted out of the room through the heat exchange core, the design can solve the problems that the temperature is low in winter and the heat exchange core is frozen and defrosted, fresh air directly enters the room or the return air side of the air conditioner without passing through the heat exchange core, heat exchange is not conducted on the fresh air and the return air, the load of the air conditioner can be reduced, and meanwhile, the indoor health and comfort are improved; (2) an internal circulation exchange mode is started through the intelligent controller, and the internal circulation air door is opened to realize internal circulation. Specifically, when the outdoor air quality is extremely poor and the pollution is serious, the indoor introduction of fresh air is not recommended, the full heat exchanger is opened in an internal circulation exchange mode, an internal circulation air door is opened, a fresh air outlet and an air outlet are closed to carry out internal circulation, and the indoor air flows through the triple filter screens to purify the indoor air and improve the indoor air quality.

The existing side ventilation door mechanism is the same as the internal circulation air door mechanism, and the motor rotating disc is driven to rotate through the operation of the motor, so that the connecting rod is driven to move, and the back-and-forth swing of the air door is realized, so that the ventilation and closing functions of the air door are realized, as shown in fig. 1. The motor turntable in the air door mechanism can rotate in the whole circle, and the air door can swing in a reciprocating way, and the mechanism is called as a crank rocker mechanism in a mechanical mechanism.

The air door mechanism main action is for changing the wind flow direction, and the material of air door is ABS, and on wind can blow directly the air door when the bypass, the air door receives the blowing force F that the wind flowed, keeps away from the position of installation axle at the air door this moment, and the deflection of air door is great, and the leakproofness of air door is relatively poor, and under the great condition of pressure differential around the air door, the deflection of air door is bigger, and the leakproofness is more poor.

In addition, as shown in fig. 1, a rotation space of the damper needs to be reserved in the opening and closing processes of the damper, and when the opening area of the damper is large, it becomes a problem to ensure the rotation space of the damper, and it is difficult to satisfy the layout requirement of compact structure. And when the motor rotated to extreme position, stop device was wide and big, even under the air door closure state, under the wind pressure effect, the leakproofness of air door was relatively poor.

Therefore, the total heat exchanger with the air door which occupies small space and has good sealing effect is provided.

Disclosure of Invention

The present invention is directed to solving, at least in part, one of the technical problems in the related art. For this purpose,

according to an embodiment of the present disclosure, there is provided an enthalpy exchanger including:

a housing having an air opening formed therein;

air door, locate wind gap department just has to close the closed condition in wind gap and opening the open mode in wind gap, the air door includes:

the mounting frame is connected to the machine shell and located at the air port, the mounting frame is provided with a mounting plate, and a ventilation opening which penetrates through the mounting plate and corresponds to the air port is formed in the mounting plate;

the movable wind shield is arranged on one side of the mounting plate;

the rack is vertically arranged on the movable wind shield, and the teeth above the rack face to one side of the movable wind shield, which is far away from the mounting plate;

a gear engaged with the rack;

the driving mechanism is connected to the installation frame and connected with the gear, the driving mechanism drives the gear to rotate to drive the rack to move up and down, the rack drives the movable wind shield to move up and down to open the ventilation opening to enable the air door to be in an open state or close the ventilation opening to enable the air door to be in a closed state.

This air door mechanism realizes reciprocating of activity deep bead through gear and rack in order to realize opening and closing of wind gap, and the air door structure is comparatively compact for the air door also can open and close in narrow and small space, and occupation space is little, makes full heat exchanger's size less, and air door structure makes simply and convenient assembling.

According to the embodiment of the disclosure, the air door is still including connecting apron on the installation frame, the apron has and is located the activity deep bead is kept away from the apron body of installation board one side, be equipped with on the apron body and run through the apron body and with the first opening that the vent corresponds, actuating mechanism connects on the apron body, through setting up apron and apron body, sets up actuating mechanism on the apron body, stable in structure.

According to the embodiment of the disclosure, actuating mechanism includes the motor, the output shaft of motor with gear connection, the air door is still including connecting motor fixed plate on the apron body, the motor is connected on the motor fixed plate, set up the motor and make actuating mechanism simple, the cost is lower, sets up the motor fixed plate, makes things convenient for the fixed of motor.

According to this disclosed embodiment, the installation frame has the frame bottom plate, the bottom of activity deep bead is connected with down the bolster, when the activity deep bead downstream arrives lower extreme position, bolster centre gripping is in down the frame bottom plate with between the activity deep bead, set up bolster down, can cushion when the activity deep bead moves lower extreme position, avoid activity deep bead and frame bottom plate to produce great striking.

According to the embodiment of the disclosure, be equipped with the sealing rubber strip on the frame bottom plate, when the activity deep bead downstream reached lower extreme position, the clamping of sealing rubber strip was in down the bolster with between the frame bottom plate, set up the sealing rubber strip on the frame bottom plate and can make and play sealed effect when lower extreme position seals the wind gap, improve the leakproofness of air door.

According to this disclosed embodiment, the apron still includes the apron roof, the upside of activity deep bead is connected with the bolster, when the activity deep bead upwards moves upper limit position, go up the bolster and support with the lower lateral wall of apron roof, set up the bolster, can cushion when the activity deep bead moves upper limit position, avoid activity deep bead and apron roof to produce great striking.

According to this disclosed embodiment, still be equipped with on the apron body and run through the apron body and be used for monitoring the second opening of rack, the second opening is located the upside or the downside of first opening, conveniently monitor the rack state to carry out failure diagnosis.

According to this disclosed embodiment, the lateral part of activity deep bead is to being close to the guide board is formed by buckling in one side of apron body, the apron still includes apron body bilateral side direction the apron curb plate that the mounting panel lateral buckling formed, the guide board is located the inboard of apron curb plate sets up the guide board, and stability when can guaranteeing the up-and-down motion of activity deep bead takes place to control when avoiding the up-and-down motion of activity deep bead and rocks.

According to the embodiment of the disclosure, the lateral part of first opening to activity deep bead one side bending type becomes the limiting plate, the guide board is located the apron curb plate with between the limiting plate, can make the guide board move between apron curb plate and limiting plate, produce great rocking when avoiding the activity deep bead to reciprocate, improve the stability of activity deep bead and have certain direction function to the activity deep bead.

According to the embodiment of the disclosure, the motor fixing plate is connected to one side of the cover plate body, the cover plate body is provided with the avoidance part for avoiding the motor and the motor avoidance part for the gear and the gear avoidance part, so that the motor and the gear are convenient to install, the thickness of the air door can be reduced, and the size of the total heat exchanger is further reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of a prior art damper;

FIG. 2 is a schematic diagram of the construction of a total heat exchanger according to an embodiment of the present disclosure;

FIG. 3 is a perspective view of a damper according to an embodiment of the present disclosure;

FIG. 4 is a perspective view of another perspective of a damper according to an embodiment of the present disclosure;

FIG. 5 is a perspective view of another perspective of a damper according to an embodiment of the present disclosure;

FIG. 6 is a perspective view of a damper removal cover plate according to an embodiment of the present disclosure;

FIG. 7 is an enlarged view of a portion of FIG. 6 at A;

FIG. 8 is a perspective view of a damper removal frame according to an embodiment of the present disclosure;

fig. 9 is a partial enlarged view at B in fig. 8;

FIG. 10 is a schematic view of a partial structure of a damper according to an embodiment of the present disclosure;

FIG. 11 is an enlarged view of a portion of FIG. 10 at C;

FIG. 12 is a top cross-sectional view of a damper according to an embodiment of the present disclosure;

fig. 13 is a partially enlarged view at D in fig. 12.

In the above figures: a housing 1; a fresh air inlet 11; a fresh air outlet 12; a dirty air inlet 13; a dirty air outlet 14; a fresh air fan cavity 15; a dirty fan chamber 16; a heat exchange core 2; a fresh air blower 31; a dirty air blower 32; a damper 4; a mounting frame 41; a mounting plate 411; a vent 412; a frame base 413; a frame fixing plate 414; a frame top plate 415; a movable wind deflector 42; a guide plate 421; a rack 43; a gear 44; a drive mechanism 45; a motor 451; a cover plate 46; a cover plate body 461; a motor escape section 4611; a gear escape 4612; the first opening 462; a cover top plate 463; a second opening 464; a cover plate side 465; a position limiting plate 466; a cover plate connecting plate 467; a motor fixing plate 47; a lower bumper 481; an upper bumper 482.

Detailed Description

The utility model is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures, and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

Referring to fig. 2, the total heat exchanger includes a housing 1, and an air port is formed on the housing 1, wherein the air port includes a fresh air inlet 11, a fresh air outlet 12, a dirty air inlet 13, and a dirty air outlet 14.

Referring to fig. 2, the total heat exchanger further includes a heat exchange core 2, the heat exchange core 2 is located in the housing 1, a first air channel and a second air channel are formed in the heat exchange core 2, the first air channel is communicated with the fresh air inlet 11 and the fresh air outlet 12, the second air channel is communicated with the dirty air inlet 13 and the dirty air outlet 14, fresh air enters the first air channel from the fresh air inlet, dirty air enters the second air channel from the dirty air inlet, the fresh air exchanges heat with dirty air in the second air channel in the first air channel, the fresh air after heat exchange is discharged from the fresh air outlet, and the dirty air after heat exchange is discharged from the dirty air outlet.

Referring to fig. 2, a fresh air fan cavity 15 and a dirty air fan cavity 16 are defined in the casing, the total heat exchanger further includes a fresh air fan 31 and a dirty air fan 32, the fresh air fan cavity is located between the first air duct and the fresh air outlet 12 and communicates the first air duct with the fresh air outlet 12, the fresh air fan is located in the fresh air fan cavity, the fresh air fan is used for driving fresh air to flow, the dirty air fan cavity is communicated with the dirty air outlet and the second air duct, the dirty air fan is located in the dirty air fan cavity and used for driving dirty air to flow.

The casing 1 comprises an upper cover, a bottom cover, a left side cover, a right side cover, a front side cover and a rear side cover, wherein the air inlet and the air outlet are arranged on the left side cover and the right side cover, the fresh air inlet and the dirty air outlet are arranged on the same side cover, and the fresh air outlet and the dirty air inlet are arranged on the same side cover.

The wind gap still includes bypass wind gap (not shown), bypass wind gap locates and communicates between new trend air intake and the new trend fan chamber with new trend air intake and new trend fan chamber between new trend air intake and the new trend fan chamber, make the wind that enters into the casing from the new trend air intake can directly enter into the new trend fan intracavity through the bypass wind gap, then discharge from the new trend air outlet, make this part wind not enter into the heat exchange core in with dirty wind carry out the heat exchange, can directly introduce the new trend indoor under the suitable condition of outdoor wind temperature, and need not enter into the heat exchange core in with dirty wind heat exchange after discharge, prolong the life of heat exchange core to a certain extent, the channel resistance that the new trend flowed through is less simultaneously, make the consumption of new trend fan decline, can realize energy saving and consumption reduction's effect.

The wind gap still includes the inner loop wind gap (not shown), and the inner loop wind gap is located between dirty wind air intake and the new trend fan chamber with intercommunication between dirty wind air intake and the new trend fan chamber for the wind that enters into the casing from dirty wind air intake can directly enter into the new trend fan intracavity through the inner loop wind gap, then discharges from the new trend air outlet, forms the internal loop. A filter screen can be arranged between the dirty air inlet and the internal circulation air inlet to sterilize and filter air, so that the re-exhausted air is clean.

The total heat exchanger further includes a damper 4 provided at the air port, and the damper has a closed state of closing the air port and an open state of opening the air port. Specifically, the air door 4 may be disposed at the fresh air inlet 11, the fresh air outlet 12, the dirty air inlet 13, and the dirty air outlet 14, or may be disposed at the side vent and the internal circulation air outlet.

Referring to fig. 3 to 4, the damper 4 includes a mounting frame 41, a movable wind deflector 42, a rack 43, a gear 44, and a drive mechanism 45. Referring to fig. 5 to 6, the mounting frame 41 is connected to the enclosure 1, the mounting frame 41 is located at the air inlet, the mounting frame has a mounting plate 411, a vent 412 penetrating through the mounting plate is disposed on the mounting plate, and the vent 412 corresponds to the air inlet. The movable wind deflector 42 is arranged on one side of the mounting plate 411, and the rack 43 is vertically arranged on the movable wind deflector 42 and the teeth on the rack face the side of the movable wind deflector 42 away from the mounting plate 411. The gear 44 is meshed with the rack 43, the driving mechanism 45 is connected to the mounting frame 41, the driving mechanism 45 is connected with the gear 44, the driving mechanism drives the gear to rotate to drive the rack to move up and down, and the rack drives the movable wind shield to move up and down to open the ventilation opening and enable the ventilation opening to be in an open state or close the ventilation opening and enable the ventilation opening to be in a closed state.

When the air door was used in full heat exchanger's wind gap department, especially when using in full heat exchanger's bypass wind gap and inner loop wind gap department, this air door mechanism realized reciprocating in order to realize opening and closing of wind gap of activity deep bead through gear and rack, and the air door structure is comparatively compact for the air door also can be opened and closed in narrow and small space, and occupation space is little, makes full heat exchanger's size less, and the air door structure makes simply and convenient assembling.

The rack 43 and the gear 44 may be made of plastic, the gear 44 and the rack 43 may be made of Polyformaldehyde (POM), which is the most common and important thermoplastic engineering plastic for gears, and can ensure the gear to have long-term dimensional stability, excellent fatigue resistance, moisture resistance, small friction coefficient, high wear resistance, high impact strength and other excellent characteristics in a wide temperature range, and certain self-lubricating property.

The rack 43 may be fixedly mounted on the movable wind deflector 42, and a specific rack may be fixed on the movable wind deflector by an adhesive and a double-sided tape, and the rack may be fixed in the middle of the movable wind deflector.

Referring to fig. 3-6 and 8, the damper 4 further includes a cover plate 46, the cover plate 46 is connected to the mounting frame 41, the cover plate 46 has a cover plate body 461, the cover plate body is located on a side of the movable wind deflector 42 away from the mounting plate, a first opening 462 penetrating through the cover plate body and corresponding to the ventilation opening is provided on the cover plate body 461, and the first opening may be a regular pattern or other regular or irregular pattern such as a rectangle, a circle, a triangle, etc., as long as the air can pass through.

Referring to fig. 10 to 11, the driving mechanism 45 is connected to the cover plate body 461, and the driving mechanism is disposed on the cover plate body by disposing the cover plate and the cover plate body, so that the structure is stable. The driving mechanism 45 comprises a motor 451, the air door also comprises a motor fixing plate 47, the motor is connected on the motor fixing plate, and the output shaft of the motor is connected with the gear. The motor is arranged, so that the driving mechanism is simple, the cost is low, and the motor fixing plate is arranged, so that the motor is convenient to fix.

Be equipped with the motor mounting hole on the motor, two motor mounting holes of motor accessible are fixed on the motor fixed plate.

The motor fixing plate 47 may be connected to one side of the cover body 461, wherein the motor fixing plate 47 may be connected to one side of the cover body close to the movable wind deflector or one side far from the movable wind deflector. The motor fixing plate can be riveted or welded or fixed on the cover plate body through screws.

Referring to fig. 10 to 11, the cover plate body is provided with a motor avoiding portion 4611 and a gear avoiding portion 4612 for avoiding the motor and the gear, so that the motor and the gear can be conveniently mounted, the thickness of the air door can be reduced, and the size of the total heat exchanger can be reduced. When the motor fixing plate 47 is connected to one side of the cover plate body close to the movable wind deflector, the motor avoiding portion 4611 and the gear avoiding portion 4612 can be respectively a groove body or a hole body, when the motor fixing plate 47 is connected to one side of the cover plate body far away from the movable wind deflector, the motor avoiding portion 4611 and the gear avoiding portion 4612 can be respectively a groove body or a hole body, wherein the groove body can be one side of the cover plate body close to the movable wind deflector or one side of the cover plate body far away from the movable wind deflector.

Referring to fig. 6-7, a lower bumper 481 is attached to the bottom of the movable wind deflector, the mounting frame having a frame base 413, the lower bumper being clamped between the frame base and the movable wind deflector when the movable wind deflector moves downwardly to a lower limit position, at which time the lower bumper can elastically deform to cushion the movable wind deflector. The lower buffer piece is arranged, so that the movable wind shield can be buffered when moving to a lower limit position, and the movable wind shield is prevented from generating large impact with the bottom plate of the frame.

Referring to fig. 8 to 9, an upper buffer 482 is connected to the top of the active wind deflector, the cover further includes a cover top plate 463 connected to the upper portion of the cover body, and when the active wind deflector moves upward to the upper limit position, the upper buffer is abutted against the lower side wall of the cover top plate, and at this time, the upper buffer can elastically deform to buffer the active wind deflector. The upper buffer piece is arranged, so that the movable wind shield can be buffered when moving to an upper limit position, and the movable wind shield is prevented from generating large impact with the cover plate top plate.

The upper and lower cushions may be formed of a deformable material, such as an open-cell polyethylene foam, and may be attached to the upper and lower surfaces of the movable wind deflector by adhesion.

Still can be equipped with sealing rubber strip (not shown) on the frame bottom plate, when the activity deep bead downstream reached lower extreme position, sealing rubber strip centre gripping was between bolster and frame bottom plate down, and at this moment, lower bolster and sealing rubber strip all can take place elastic deformation in order to cushion and better sealed the activity deep bead. Specifically, from top to bottom, movable wind shield, lower bolster, sealing rubber strip, frame bottom plate set up in proper order. Set up the sealing rubber strip on the frame bottom plate and can make and play sealed effect when the lower extreme position seals the wind gap, improve the leakproofness of air door.

The apron roof downside still can be equipped with sealing rubber strip (not shown), and when the activity deep bead upward movement reached last extreme position, sealing rubber strip centre gripping was between last bolster and apron roof, and at this moment, go up the bolster and sealing rubber strip all can take place elastic deformation in order to cushion just better sealing to the activity deep bead. Specifically, from the bottom up, activity deep bead, last bolster, sealing rubber strip, apron roof set gradually. Set up the sealing rubber strip at apron roof downside and can make and play sealed effect when lower extreme position seals the wind gap, improve the leakproofness of air door.

When the movable wind shield leaves the upper limit position and the lower limit position, the upper buffer piece, the lower buffer piece and the sealing rubber strip gradually recover to the original shapes along with the movement of the movable wind shield.

When the movable wind shield moves upwards to the upper limit position, the vent can be completely opened by the movable wind shield, and when the movable wind shield moves downwards to the lower limit position, the vent can be completely closed by the movable wind shield. Or when the movable wind deflector moves upwards to the upper limit position, the movable wind deflector can completely close the ventilation opening, and when the movable wind deflector moves downwards to the lower limit position, the movable wind deflector can completely open the ventilation opening.

Referring to fig. 10, the cover plate body is further provided with a second opening 464 penetrating through the cover plate body and used for monitoring the rack, and the second opening 464 is located on the upper side or the lower side of the first opening, so that the state of the rack can be conveniently monitored, and fault diagnosis can be performed. The second opening portion may be a regular pattern such as a rectangle, a circle, a triangle, or other regular or irregular patterns as long as the rack can be observed.

Wherein the first opening portion and the second opening portion may be located at both sides of the driving mechanism.

Referring to fig. 12-13, the lateral part of the movable wind deflector is bent to one side close to the cover plate body 461 to form a guide plate 421, the cover plate further comprises cover plate side plates 465 bent to the side of the cover plate body, the guide plate is located on the inner sides of the cover plate side plates, the guide plate is arranged, the stability of the movable wind deflector during up-and-down motion can be guaranteed, and the movable wind deflector is prevented from shaking left and right during up-and-down motion.

Referring to fig. 12-13, the lateral part of first opening is to activity deep bead one side bending type limiting plate 466, and the guide board is located between apron curb plate and the limiting plate, can make the guide board move between apron curb plate and limiting plate, produces great rocking when avoiding the activity deep bead to reciprocate, improves the stability of activity deep bead and has certain direction function to the activity deep bead.

Referring to fig. 8, the cover plate is fixedly connected to the mounting plate, and the cover plate further has a cover plate connecting plate 467 with a side plate bending to a side away from the movable wind shield, and the cover plate is connected to the mounting plate through the cover plate connecting plate. Specifically, both the cover plate connecting plate and the mounting plate can be provided with holes through which the cover plate connecting plate and the mounting plate are connected.

Referring to fig. 5, the side portion of the mounting frame is further provided with a frame fixing plate 414, the frame fixing plate is formed by bending the side portion of the mounting plate to one side of the mounting plate, and the mounting frame is connected to the casing 1 through the frame fixing plate, wherein the bending directions of the frame fixing plates at both sides of the mounting plate can be set oppositely, the frame fixing plate is arranged to facilitate the mounting of the frame, and the bending directions of the frame fixing plates are opposite, so that the frame is more stable.

Referring to fig. 5, the top of the mounting frame is further provided with a frame top plate 415, the frame top plate is formed towards one side of the mounting plate far away from the cover plate body, and the frame top plate is arranged to stabilize the frame structure.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A total heat exchanger, characterized in that, comprising:

a casing, on which a tuyere is formed;

A damper is arranged at the tuyere and has a closed state of closing the tuyere and an open state of opening the tuyere, the damper comprising:

an installation frame, connected to the casing and located at the tuyere, the installation frame has an installation plate, and the installation plate is provided with a ventilation opening passing through the installation plate and corresponding to the tuyere;

a movable wind deflector, arranged on one side of the mounting plate;

a rack, vertically mounted on the movable windshield and the teeth above it facing the side of the movable windshield away from the mounting plate;

a gear meshing with the rack;

A drive mechanism is connected to the mounting frame and connected to the gear, the drive mechanism drives the gear to rotate and drives the rack to move up and down, and the rack drives the movable windshield to move up and down to open the The vent keeps the damper in the open state or closing the vent keeps the damper in the closed state.

2 . The total heat exchanger according to claim 1 , wherein the damper further comprises a cover plate connected to the mounting frame, the cover plate having a cover plate located at a distance from the movable windshield plate away from the mounting plate. 3 . A cover plate body on one side of the plate, the cover plate body is provided with a first opening that penetrates the cover plate body and corresponds to the ventilation opening, and the driving mechanism is connected to the cover plate body.

3 . The total heat exchanger according to claim 2 , wherein the driving mechanism comprises a motor, the output shaft of the motor is connected with the gear, and the damper further comprises a connection on the cover body. 4 . The motor fixing plate is connected to the motor fixing plate.

4 . The total heat exchanger according to claim 1 , wherein the mounting frame has a frame bottom plate, the bottom of the movable wind deflector is connected with a lower buffer, and the movable wind deflector moves downward to the At the lower limit position, the lower buffer member is clamped between the frame bottom plate and the movable wind deflector.

5 . The total heat exchanger according to claim 4 , wherein a sealing rubber strip is provided on the frame bottom plate, and when the movable wind deflector moves down to a lower limit position, the sealing rubber strip clamps the It is held between the lower buffer and the frame bottom plate.

6 . The total heat exchanger according to claim 2 , wherein the cover plate further comprises a cover plate top plate, an upper buffer member is connected to the upper side of the movable wind shield, and the movable wind shield is upward. 7 . When moving to the upper limit position, the upper buffer piece abuts against the lower side wall of the top plate of the cover plate.

7 . The total heat exchanger according to claim 2 , wherein the cover plate body is further provided with a second opening that penetrates through the cover plate body and is used for monitoring the rack, and the first The two openings are located on the upper side or the lower side of the first opening.

8 . The total heat exchanger according to claim 2 , wherein a side portion of the movable wind deflector is bent to a side close to the cover plate body to form a guide plate, and the cover plate further comprises a guide plate. 9 . A cover plate side plate is formed by bending two sides of the cover plate body toward the mounting plate side, and the guide plate is located on the inner side of the cover plate side plate.

9 . The total heat exchanger according to claim 8 , wherein a side portion of the first opening is bent toward one side of the movable wind deflector to form a limit plate, and the guide plate is located in the between the side plate of the cover plate and the limit plate.

10 . The total heat exchanger according to claim 3 , wherein the motor fixing plate is connected to one side of the cover plate body, and the cover plate body is provided with a space to avoid the motor and the gear. 11 . the motor avoidance part and gear avoidance part.