CN103185388A - Heat exchange device - Google Patents

Abstract

A heat exchange device for heat exchange between indoor air and outdoor air, which includes a housing, a first volute, a second volute and a heat exchange element arranged in the housing, the housing has a bottom plate , a top plate and a side plate, the side plate is provided with at least two indoor air passage holes and at least two outdoor air passage holes, and the heat exchange element is equipped with heat conducting plates stacked at a predetermined interval and alternately formed mutually independent The plurality of first air passages and second air passages of the passage are characterized in that they also include a windshield for restricting the air passage, and the windshield is in contact with the top surface of the heat exchange element and is in contact with the top plate connected, the two ends of the windshield are connected to the side plate, and a guide space is formed between the heat exchange element, the top plate, the side plate and the windshield, and the guide space It communicates with the first air passage and the other one of the indoor air passage holes.

Description

heat exchange device

technical field

The invention relates to a heat exchange device for performing indoor ventilation by exchanging indoor air and outdoor air.

Background technique

Keeping indoor air fresh is fundamental to ensure people's health. With the improvement of people's requirements for ventilation quality, at present, various heat exchange devices for indoor ventilation have been developed.

Fig. 1 to Fig. 5 have shown a kind of existing heat exchanging device, and it comprises housing 61 and the first volute 67 that is arranged in housing 61, the second volute 68 and a plurality of heat exchanging elements 62, shell The body has a bottom plate, a top plate, and a side plate, and the side plate is provided with an indoor suction port 63 , an indoor air outlet 64 , an outdoor air inlet 65 and an outdoor air outlet 66 . Eight heat exchange elements 62 are arranged on the inside of the side plate. The heat exchange element 62 includes a plurality of intake passages 4A and exhaust passages 4B in which heat transfer plates are stacked at predetermined intervals to alternately form mutually independent passages (as shown in FIGS. 3 and 4 ). The eight heat exchange elements 62 are all coarse-hole heat exchange elements. Three internal partitions parallel to the bottom plate are formed in the housing 61. The three internal partitions and the adjacent side plates divide the housing into four spaces. From the bottom board to the top board, there are first space 71 and the second space 72 , third space 73 and fourth space 74 . The first space 71 runs through the entire bottom layer of the casing. The fourth space 74 runs through the entire top floor of the casing. The first scroll 67 is disposed in the second space 72 , and the second scroll 68 is disposed in the third space 73 .

During air exchange, indoor air enters the fourth space 74 from the indoor suction port 63, then enters the first volute 67 through the exhaust path of the heat exchange element 62 arranged around the heat exchange device, and finally passes through the first volute 67 from the outdoor air. The outlet 66 discharges. The outdoor air enters the first space 71 from the outdoor suction port 65, then enters the second volute 68 through the exhaust path of the heat exchange element 62 arranged around the heat exchange device, and finally is discharged from the indoor air outlet 64 through the second volute 68 .

As shown in Figure 5, the indoor suction port 63, the indoor air outlet 64, the outdoor air inlet 65 and the outdoor air outlet 66 are all 4-section air outlets, and the taper of the conical ring of the connecting section 69 connecting the air outlet and the side plate is 4, namely 2a/b=4.

However, the above-mentioned heat exchange device has the disadvantage of large volume. If the structure of the heat exchange device is kept unchanged and the volume is only reduced, the air volume will be insufficient, thereby failing to meet the requirements for ventilation.

Contents of the invention

The present invention aims to overcome the disadvantages of the above-mentioned prior art, and provides a heat exchange device that increases the air volume while keeping the volume of the heat exchange device unchanged; or reduces the volume of the heat exchange device while maintaining the same air volume and heat exchange efficiency.

The technical scheme adopted in the present invention is as follows:

A heat exchange device for heat exchange between indoor air and outdoor air, which includes a housing, a first volute, a second volute and a plurality of heat exchange elements arranged in the housing, the housing It has a bottom plate, a top plate and a side plate, and the side plate is provided with at least two indoor air passage holes and at least two outdoor air passage holes. A plurality of first air passages and second air passages of independent passages, a first inner partition is provided in the housing, a first space below the first inner partition is formed in the housing, and A second space located above the first inner partition, the first space communicates with the first air path of the heat exchange element and one of the outdoor air passage holes, and the second space communicates with One of the second air passage of the heat exchange element and the indoor air passage hole, the second air passage communicates with the other of the outdoor air passage holes, and the first volute is located at The first space extends to one of the outdoor air passage holes, the second volute is located in the second space and extends to one of the indoor air passage holes, and the thermal The exchange element is arranged between the first inner partition and the side plate, and is characterized in that it also includes a windshield for restricting the air path, and the windshield is in contact with the top surface of the heat exchange element and connected to the top plate, both ends of the windshield are connected to the side plate, forming a guiding space between the heat exchange element, the top plate, the side plate and the windshield, The guide space communicates with the first air passage and the other one of the indoor air passage holes.

The beneficial effect of the present invention is: by adopting the L-shaped guiding space, the wind is more concentrated, the pressure loss is reduced, and the air volume is increased. In addition, since the pressure loss is reduced, the required air volume can be obtained even if the volume of the air passage is reduced. Therefore, the volume of the heat exchange device can be reduced.

Description of drawings

Fig. 1 is a schematic side view of a heat exchange device in the prior art.

Fig. 2 is a schematic top view of a heat exchange device in the prior art.

Fig. 3 is a perspective view of a heat exchange element of a heat exchange device in the prior art.

Fig. 4 is an exploded schematic diagram of a heat exchange element of a heat exchange device in the prior art.

Fig. 5 is a schematic diagram of a tuyere of a heat exchange device in the prior art.

Fig. 6 is an exploded perspective view of the heat exchange device according to the first embodiment of the present invention.

Fig. 7 is a schematic diagram of the air path from indoor to outdoor exhaust of the heat exchange device according to the first embodiment of the present invention.

Fig. 8 is a schematic cross-sectional view along the line A-A' in Fig. 7 of the heat exchange device according to the first embodiment of the present invention.

9 is a perspective view of the assembly of the windshield of the heat exchange device according to the first embodiment of the present invention.

Fig. 10 is a schematic diagram of the air path for supplying air from outdoors to indoors in the heat exchange device according to the first embodiment of the present invention.

Fig. 11 is a schematic cross-sectional view along line B-B' in Fig. 10 of the heat exchange device according to the first embodiment of the present invention.

Fig. 12 is a schematic diagram of the tuyere of the heat exchange device according to the first embodiment of the present invention.

Fig. 13 is a schematic diagram of the air path from the indoor to the outdoor exhaust of the heat exchange device according to the second embodiment of the present invention.

Fig. 14 is a schematic cross-sectional view of the heat exchange device according to the second embodiment of the present invention along line C-C' in Fig. 12 .

Fig. 15 is a schematic diagram of the air path for air supply from outdoor to indoor of the heat exchange device according to the second embodiment of the present invention.

Fig. 16 is a schematic cross-sectional view of the heat exchange device according to the second embodiment of the present invention along line D-D' in Fig. 14 .

Detailed ways

(first embodiment)

As shown in FIGS. 6 to 12 , the heat exchange device according to the first embodiment of the present invention includes a casing 20 and a first wind wheel 13 , a second wind wheel 12 , a first volute 15 , and a first wind wheel 13 arranged in the casing 20 . Two volutes 16 and four heat exchanging elements 14 . The housing 20 has a bottom plate 22 , a top plate 23 and a side plate 21 . In FIG. 7 , the housing 20 is roughly in the shape of a cuboid, and the horizontal section of the side plate 21 is in the shape of a rectangle. The side plate 21 includes a first side plate portion 211 , a second side plate portion 212 , a third side plate portion 213 and a fourth side plate portion 214 . The first side plate portion 211 and the third side plate portion 213 are oppositely disposed. The second side plate portion 212 is opposite to the fourth side plate portion 214 . A power supply box 41 for accommodating circuit boards is disposed outside the fourth side plate portion 214 .

During installation, the heat exchange device is suspended in the ceiling, the bottom plate 22 is close to the ceiling, the first side plate portion 211 faces the indoor side, and the third side plate portion 213 faces the outdoor side.

As shown in FIGS. 7 and 8 , a first inner partition 3 and a second inner partition 4 that are substantially parallel to the bottom plate 22 are formed inside the housing 20 . The above-mentioned "substantially parallel" means that the first inner partition 3 and the second inner partition 4 do not have to be absolutely parallel to the bottom plate 22, and can also form a certain angle with the bottom plate 22, as long as the first inner partition 3 and the second inner partition 4. It only needs to be able to divide the casing 20 into three spaces. The first inner partition 3 is located above the second inner partition 4 and between the two wind wheels, and can be used as a motor support. The first inner partition 3 and the second inner partition 4 are respectively connected to the first side plate portion 211 , the second side plate portion 212 and the third side plate portion 213 .

A biaxial motor 11 is arranged in the center of the first inner partition 3 . The shaft below the biaxial motor 11 is connected to the first wind wheel 13 , and the shaft above the biaxial motor 11 is connected to the second wind wheel 12 . A first volute 15 is arranged outside the first wind wheel 13 , and a second volute 16 is arranged outside the second wind wheel 12 .

As shown in FIG. 6 and FIG. 7 , at least two indoor air passage holes and at least two outdoor air passage holes are provided on the side plate 21 . The first volute 15 extends to one of the outdoor air passage holes, and the second volute 16 extends to one of the indoor air passage holes. At the position corresponding to the air outlet of the second volute 16 on the first side plate portion 211, a second air passage hole 6 for blowing outdoor air into the room is provided. The air outlet of the second volute 16 communicates with the second air passage hole 6 . At the position of the third side plate portion 213 corresponding to the air outlet of the first volute 15 , a third air passage hole 7 for blowing out indoor air to the outside is provided. The air outlet of the first volute 15 communicates with the third air passage hole 7 . The first side plate portion 211 is also provided with a first air passage hole 5 for sucking indoor air. The center of the first air passage hole 5 is located at a position close to the fourth side plate portion 214 of the first side plate portion 211 . The third side plate portion 213 is also provided with a fourth air passage hole 8 for inhaling outdoor air. The center of the fourth air passage hole 8 is located at the lower half of the third side plate portion 213 near the second side plate portion 212 .

As shown by the dark areas in FIGS. 7 and 8 , the heat exchange element 14 is disposed between the first inner partition 3 and the side plate 21 . In the casing 20 , one heat exchange element 14 is disposed inside the first side plate portion 211 , and three heat exchange elements 14 are disposed inside the fourth side plate portion 214 . Four heat exchange elements 14 are arranged in an L shape. The bottom of the inner surface 141 of the heat exchange element 14 is in contact with the first inner partition 3 . The bottom surface of the heat exchange element 14 is substantially aligned with the second inner partition 4 in the horizontal direction. The middle part of the inner surface 141 of the heat exchange element 14 is in contact with the first inner partition 3 , and the contact position divides the inner surface 141 into an upper part 142 and a lower part 143 . The heat exchange element 14 has a plurality of air supply passages and exhaust passages as shown in FIGS. 3 and 4 . The air supply passage and the exhaust passage are mutually independent L-shaped passages formed alternately by stacking heat transfer plates at predetermined intervals. The air supply passage is an L-shaped passage extending from the bottom surface of the heat exchange element 14 to the upper portion 142 of the inner surface 141 of the heat exchange element 14 . The exhaust passage is an L-shaped passage extending from the top surface of the heat exchange element 14 to the lower portion 143 of the inner surface 141 of the heat exchange element 14 .

Compared with the prior art, the heat exchange device of the present invention reduces the number of heat exchange elements 14, thus reducing the volume of the heat exchange device. Moreover, in the prior art, heat exchanging elements 14 are arranged inside the four side plates of the heat exchanger, so dew condensation may occur on all four side plates. In the present invention, only the heat exchanging elements 14 are arranged inside the two side plates, therefore, only these two side plates may condense.

As shown in Figure 7, Figure 8 and Figure 9, the heat exchange device of the present invention also includes a windshield 1 for restricting the air path, the windshield 1 is in contact with the top surface of the heat exchange element 14 and connected with the top plate 23, Both ends of the windshield 1 are connected to side plates 21 .

The windshield 1 is arranged above the four heat exchange elements 14 arranged in an L shape. The top of the windshield 1 is connected to the top plate 23 . The bottom of the windshield 1 is in contact with the top surfaces of the four heat exchange elements 14 . The windshield 1 is roughly aligned with the inner surfaces 141 of the four heat exchange elements 14 in the vertical direction. As shown in FIG. 7 , both ends of the wind deflector 1 are respectively connected to the first side plate portion 211 and the third side plate portion 213 . The position where the windshield 1 is connected to the first side plate portion 211 is located between the first air passage hole 5 and the second air passage hole 6 . The height of the windshield 1 can be set according to the required air volume. The windshield 1 can be made of the same metal material as the casing 20, or can be made of rubber and other materials.

As shown in Figures 7 and 8, a guide space 34 is formed between the heat exchange element 14, the top plate 23, the side plate 21, and the windshield 1, and the guide space 34 communicates with the first air path and the indoor air passage hole. another of . The top surface of the windshield 1 and the first side plate portion 211, the fourth side plate portion 214, the third side plate portion 213, the top plate 23 and the heat exchange element 14 forms an L-shaped guide shown in the dark area in FIG. Cited space34. In this way, the air entering the housing 20 from the first air passage hole 5 will be concentrated in the L-shaped guide space 34 due to the blocking of the windshield 1, instead of being dispersed like the heat exchange equipment of the prior art. in the entire top space of the enclosure. The L-shaped guide space 34 is located directly above the four heat exchange elements 14 arranged in an L shape, so that the air can smoothly enter the top of the four heat exchange elements 14 arranged in an L shape from the L-shaped guide space 34 face exhaust.

As shown in Figures 7 and 8, a first space 32 located below the first inner partition 3 and a second space 33 located above the first inner partition 3 are formed in the housing 20, and the first space 32 communicates with heat. The first air passage of the exchange element 14 and one of the outdoor air passage holes, the second space 33 communicates with the second air passage of the heat exchange element 14 and one of the indoor air passage holes, and the second air passage communicates with the outdoor air passage holes another of the .

As shown in FIGS. 7 and 8 , the first inner partition 3 , the second inner partition 4 , the first side plate portion 211 , the second side plate portion 212 , the third side plate portion 213 , and the first volute 15 The outer surface and the lower part 143 of the inner surface 141 of the four heat exchange elements 14 arranged in an L shape jointly form the first space 32 . The first space 32 communicates with the exhaust passage of the lower part 143 of the inner surface 141 of the heat exchange element 14 and the third air passage hole 7 .

The first inner partition 3, the top plate 23, the first side plate portion 211, the second side plate portion 212, the third side plate portion 213, the windshield 1, the outer surface of the second volute 16 and the L-shaped arrangement The upper parts 142 of the inner surfaces 141 of the four heat exchange elements 14 jointly form the second space 33 . The second space 33 communicates with the air supply path of the upper part 142 of the inner surface 141 of the heat exchange element 14 and the second air passage hole 6 .

The second inner partition 4 , the bottom surfaces of the four heat exchange elements 14 arranged in an L shape, the bottom plate 22 , and the side plates 21 jointly form a rectangular through-space 31 . The through space 31 is a space penetrating through the entire bottom of the casing 20 , and the through space 31 communicates with the fourth air passage hole 8 and the air supply passage located on the bottom surface of the heat exchange element 14 .

As shown in Figures 7 and 8, during exhaust, the indoor air enters the L-shaped guide space 34 above the heat exchange element 14 from the first air passage hole 5 (as shown by the solid arrow in Figure 7), and then Enter the first space 32 through the exhaust path of the heat exchange element 14, then enter the first volute 15 from the first space 32, and finally discharge from the third air hole 7 through the air outlet of the first volute 15 (as shown in Figure 7 indicated by the dotted arrow). Because the L-shaped guide space 34 is provided, the wind can be concentrated and flow in the narrow L-shaped guide space 34 instead of being dispersed in the entire top space of the casing 20, so the pressure loss can be reduced, thereby increasing the air volume , to reduce noise.

As shown in Figures 10 and 11, during air supply, outdoor air enters the through space 31 from the fourth air passage hole 8 (as shown by the dotted arrow in Figure 10), and then enters the first through the air supply path of the heat exchange element 14. The second space 33 then enters the second volute 16 from the second space 33, and finally blows out from the second air hole 6 through the air outlet of the second volute 16 (as shown by the solid arrow in Figure 10).

On the outer sides of the first side plate portion 211 and the third side plate portion 213 , at positions corresponding to the first air passage hole 5 and the fourth air passage hole 8 , a first air outlet 45 and a fourth air outlet 48 are respectively provided. Therefore, the wind sucked from the first air outlet 45 and the fourth air outlet 48 can enter the first air passage hole 5 and the fourth air passage hole 8 . On the outer sides of the first side plate portion 211 and the third side plate portion 213 , at positions corresponding to the second air passage hole 6 and the third air passage hole 7 , there are respectively provided a second air outlet 46 and a third air outlet 47 . Therefore, the wind blown from the second air outlet 6 and the third air outlet 7 can enter the second air outlet 46 and the third air outlet 47 . The first tuyere 45, the second tuyere 46, the third tuyere 47 and the fourth tuyere 48 are all four-section tuyere, as the second tuyere 46 and the third tuyere 47 of the air outlet, which are respectively connected to the connecting section of the side plate 21 49 is a conical ring, and the taper of the connecting section 49 is 4/3 (as shown in Figure 12). As the first tuyere 45 and the fourth tuyere 48 of the air inlet, the connection sections connected to the side plate 21 respectively can also be conical rings with a taper of 4/3. Compared with the prior art, the taper is reduced. By reducing the taper of the air outlet, the wind resistance is reduced, the air volume is increased, and the noise is reduced.

As shown in Figure 8, compared with the prior art, the heat exchange device of the present invention removes the partition between the first inner partition 3 and the top plate 23, so that the second space 33 extends from the first inner partition 3 to the top. The plate 23 therefore increases the volume of the second space 33, thereby reducing the pressure loss and increasing the air volume. Moreover, compared with the prior art, the position of the first inner partition 3 is appropriately increased, that is, the distance L2 between the first inner partition 3 and the bottom plate 22 is increased, thus increasing the volume of the first space 32 , so that the pressure loss can be reduced and the air volume can be increased. Of course, if the air volume is kept constant, L2 and the distance L1 between the first inner partition 3 and the top plate 23 can be reduced, thereby reducing the volume of the thermal device.

As shown in FIG. 8 , the distance L1 between the first inner partition 3 and the top plate 23 of the heat exchange device is smaller than the distance L2 between the first inner partition 3 and the bottom plate 22 . Thus, the wind pressures in the first space 32 and the second space 33 are balanced. The value of L1:L2 can be adjusted according to the air intake volume and air output volume, so as to achieve wind pressure balance.

As shown in FIG. 8 , the central axis of the fourth tuyere 48 is located below the horizontal centerline of the plane of the side plate 21 . Therefore, the central axis of the fourth air outlet 48 is as close as possible to the center of the fourth air passage 8, or even coincides, so that more wind can enter the fourth air passage 8 straightly, thereby reducing wind resistance and increasing air volume. Likewise, the central axis of the first tuyere 45 may also be located below the horizontal centerline of the plane of the side plate 21 . Therefore, the central axis of the first tuyere 45 is as close as possible to the center of the first air passage 5, or even coincides, so that more wind can enter the first air passage 5 straightly, thereby reducing wind resistance and increasing air volume.

Among the four heat exchange elements 14, at least one is a fine-pore heat exchange element, that is, a heat exchange element with a pore diameter of less than 1.0 mm. In this specification, the aperture refers to the width H of the intake passage 4A or the exhaust passage 4B shown in FIG. 3 . As shown in Figure 7, the heat exchange element 14 in the middle of the three heat exchange elements 14 inside the fourth side plate portion 214 where the power supply box 41 is installed can be a fine-hole heat exchange element, Among the three heat exchange elements 14 inside the fourth side plate portion 214 of the power supply box 41, the heat exchange elements 14 at both ends are fine-pore heat exchange elements, and other heat exchange elements 14 may also be fine-pore heat exchange elements. The aforementioned “both ends” refer to positions close to the first side plate portion 211 or the third side plate portion 213 . Because in the heat exchange device of the present invention, the number of heat exchange elements 14 is only half of that of the heat exchange device of the prior art, so if still all adopt coarse-hole heat exchange elements, that is, the heat exchange with a pore diameter of more than 1.5 mm components, the heat exchange efficiency may not meet the requirements.

Therefore, the heat exchange efficiency per unit volume can be improved by using fine-pore heat exchange elements to meet actual needs. Therefore, the heat exchange device of the present invention can obtain the same heat exchange efficiency as the prior art under the premise of reducing the number of heat exchange elements 14 . It can be understood that, according to actual needs, all heat exchange elements 14 may adopt coarse-pore heat exchange elements, and multiple heat exchange elements 14 may adopt fine-pore heat exchange elements, or even all heat exchange elements 14 may adopt fine-pore heat exchange elements .

Because of the use of fine-pore heat exchange elements, the cross-sectional area of the air supply path and exhaust path is reduced, thereby increasing wind resistance. Also, since the number of heat exchanging elements 14 is reduced, the number of air supply passages and exhaust passages is reduced, thereby also increasing wind resistance. In this way, if the structure of the prior art is still adopted, the air volume may not meet the requirements. However, because the present invention adopts structures such as the above-mentioned L-shaped guide space 34, the wind resistance is reduced, so the required air volume can still be obtained.

On the outer side of the fourth side plate portion 214, a power supply box 41 for accommodating circuit boards is provided. During maintenance, first take out the heat exchange element 14 arranged in the fourth side plate portion 214 in the vertical direction from below the heat exchange device, at this time, there will be left between the fourth side plate portion 214 and the second volute 16 A relatively large space, through which maintenance personnel can easily disassemble and take out the power supply box 41 for maintenance.

(second embodiment)

The basic structure of the heat exchange device of this embodiment is the same as that of the first embodiment, and only the differences between this embodiment and the first embodiment will be described below.

13 to 16 show a heat exchange device according to a second embodiment of the present invention. Different from the first embodiment, the heat exchange device of the second embodiment does not have a second inner partition inside the casing 20, but only a first inner partition 3 parallel to the bottom plate 22 is arranged. Moreover, the third air outlet 7 is used for inhaling outdoor air, the fourth air outlet 8 is used for blowing out indoor air to the outside, and the purposes of the first air outlet 5 and the second air outlet 6 remain unchanged. A first volute 15 is arranged below the first inner partition 3 , and a second volute 16 is arranged above the first inner partition 3 . The air outlet of the first volute 15 communicates with the fourth air outlet 8 , and the air outlet of the second volute 16 communicates with the second air outlet 6 . That is, both the air outlets of the first volute 15 and the second volute 16 are disposed on a side close to the second side plate portion 212 . A motor 17 and a motor 18 are arranged in the center of the first inner partition 3, and the shafts of the motor 17 and the motor 18 are connected with the first wind wheel 13 and the second wind wheel 12 respectively, so that the first wind wheel 13 and the second wind wheel 12 The direction of rotation is reversed.

As shown by the shadow in Fig. 13, in the casing 20, one heat exchange element 14 is arranged on the inner side of the first side plate part 211 and the third side plate part 213, and three heat exchange elements 14 are arranged on the inner side of the fourth side plate part 214. heat exchange element 14 . Five heat exchange elements 14 are arranged in a U shape.

As shown in Figure 13 and Figure 14, the heat exchange device of the second embodiment of the present invention also includes a bottom windshield 2, the bottom windshield 2 is in contact with the bottom surface of the heat exchange element 14 and connected with the bottom plate 22, the bottom windshield The two ends of 2 are connected with side plate 21.

An inverted Ω-shaped bottom windshield 2 is provided below the five heat exchange elements 14 arranged in a U shape. The bottom of the bottom windshield 2 is connected to the bottom plate 22 , and the top is in contact with the bottom surfaces of the five heat exchange elements 14 . Both ends of the bottom windshield 2 are respectively connected to the first side plate portion 211 and the third side plate portion 213 .

An inverted Ω-shaped top windshield 9 is also arranged above the five heat exchange elements 14 arranged in a U shape. The top of the top windshield 9 is connected to the top plate 23 , and the bottom is in contact with the top surfaces of the five heat exchange elements 14 . Both ends of the top windshield 9 are respectively connected to the first side plate portion 211 and the third side plate portion 213 .

The position where the bottom windshield 2 and the top windshield 9 are connected to the first side plate part 211 is located between the first wind hole 5 and the second wind hole 6 . The position where the bottom windshield 2 and the top windshield 9 are connected to the third side plate part 213 is located between the third wind hole 7 and the fourth wind hole 8 . The bottom windshield 2 and the top windshield 9 are vertically aligned with the inner side surfaces 141 of the five heat exchange elements 14 . The height of the bottom windshield 2 and the top windshield 9 can be set according to the required air volume. The bottom windshield 2 and the top windshield 9 can be made of the same material as the housing 20, or can be made of rubber and other materials.

A bottom guide space 35 is formed between the heat exchange element 14 , the bottom plate 22 , the side plate 21 and the bottom windshield 2 , and the bottom guide space communicates with the second air passage and one of the outdoor air passage holes.

Bottom windshield 2 forms a U-shaped bottom as shown in the dark area of FIG. Guide space35. In this way, the air entering the casing 20 through the third air passage hole 7 will concentrate and flow in the narrow U-shaped bottom guiding space 35 due to the blocking of the bottom wind shield 2 . Instead of being dispersed in the entire bottom space of the casing like the heat exchange equipment in the prior art. The bottom guide space 35 is located directly below the five heat exchange elements 14 arranged in a U shape, so that the air can smoothly enter the air supply path on the bottom surface of the five heat exchange elements 14 arranged in a U shape from the bottom guide space 35 .

The top windshield 9 forms a U-shaped guiding space 38 with the first side plate portion 211 , the fourth side plate portion 214 , the third side plate portion 213 , the top plate 23 and the top surface of the heat exchange element 14 . In this way, the air entering the casing 20 from the first air passage hole 5 will concentrate and flow in the narrow U-shaped guiding space 38 due to the blocking of the top wind shield 9 . Rather than being dispersed in the entire top-floor space of the casing like the heat exchange equipment in the prior art. The U-shaped guide space 38 is located directly above the five heat exchange elements 14 arranged in a U shape, so that the air can smoothly enter the top of the five heat exchange elements 14 arranged in a U shape from the U-shaped guide space 38 face exhaust.

The bottom windshield 2, the first inner partition 3, the bottom plate 22, the first side plate portion 211, the second side plate portion 212, the third side plate portion 213, the outer surface of the first volute 15, and the outer surface of the first volute 15 are arranged in a U shape. The lower parts 143 of the inner surfaces 141 of the five heat exchange elements 14 jointly constitute the first space 36 . The first space 36 communicates with the exhaust path of the heat exchange element 14 and the fourth air passage hole 8 . The top windshield 1, the first inner partition 3, the top plate 23, the first side plate portion 211, the second side plate portion 212, the third side plate portion 213, the outer surface of the second volute 16 and the outer surface of the U-shaped arrangement The upper parts 142 of the inner surfaces 141 of the five heat exchange elements 14 jointly form the second space 37 . The second space 37 communicates with the air supply path of the heat exchange element 14 and the second air passage hole 6 .

As shown in Figures 13 and 14, during ventilation, the indoor air enters the guide space 38 above the heat exchange element 14 from the first air passage hole 5 (as shown by the solid arrow in Figure 13), and then passes through the heat exchange The exhaust path of the element 14 enters the first space 36, then enters the first volute 13 from the first space 36, and finally discharges from the fourth air hole 8 through the air outlet of the first volute 13 (as shown by the dotted line in Figure 13 indicated by the arrow).

As shown in Figures 15 and 16, during air supply, outdoor air enters the bottom guide space 35 from the third air passage hole 7 (as shown by the dotted arrow in Figure 15), and then passes through the air supply path of the heat exchange element 14 Enter the second space 37, then enter the second volute 16 from the second space 37, and finally blow out from the second air hole 6 through the air outlet of the second volute 16 (as shown by the solid arrow in Figure 15).

Because the U-shaped bottom guide space 35 and the top guide space 38 are provided, the wind can be concentrated to flow in the narrow U-shaped bottom guide space 35 and the top guide space 38 instead of being dispersed. In the entire bottom and top space of the casing 20, the pressure loss can be reduced, thereby increasing the air volume.

As shown in FIG. 14 , the distance L1 between the first inner partition 3 and the top plate 23 of the heat exchange device is equal to the distance L2 between the first inner partition 3 and the bottom plate 22 . Therefore, the wind pressure in the space between the first inner partition 3 and the top plate 23 and the space between the first inner partition 3 and the bottom plate 22 is balanced.

Claims (11)

1. A heat exchange device for carrying out heat exchange between indoor air and outdoor air, comprising a housing (20) and a first volute (15) and a second volute arranged in the housing (20). A shell (16) and a plurality of heat exchange elements (14), the shell (20) has a bottom plate (22), a top plate (23) and a side plate (21), the side plate (21) is provided with at least two Indoor air passage holes (5, 6) and at least two outdoor air passage holes (7, 8), the heat exchange element (14) is equipped with heat conducting plates stacked at a predetermined interval and alternately forming mutually independent passages a plurality of first gas paths and second gas paths, A first inner partition (3) is arranged in the housing (20), and a first space (32, 36) below the first inner partition (3) is formed in the housing (20) ), and the second space (33, 37) above the first inner partition (3), the first space (32, 36) communicates with the first air of the heat exchange element (14) One of the air passage and the outdoor air passage (7, 8), the second space (33, 37) communicates with the second air passage of the heat exchange element (14) and the indoor air passage One of the air holes (5, 6), the second air passage communicates with the other of the outdoor air holes (7, 8), The first volute (15) is located in the first space (32, 36) and extends to one of the outdoor air passage holes (7, 8), and the second volute (16) is located in In the second space (33, 37) and extending to one of the indoor air passage holes (5, 6), The heat exchange element (14) is arranged between the first inner partition (3) and the side plate (21), It is characterized in that, It also includes a windshield (1) for restricting the air path, the windshield (1) is in contact with the top surface of the heat exchange element (14) and connected with the top plate (23), the windshield The two ends of the piece (1) are connected with the side plate (21), A guide space (34) is formed between the heat exchange element (14), the top plate (23), the side plate (21) and the windshield (1), and the guide space (34 ) communicates with the first air passage and the other one of the indoor air passage holes (5, 6). 2. The heat exchange device according to claim 1, wherein: It also includes a bottom windshield (2), the bottom windshield (2) is in contact with the bottom surface of the heat exchange element (14) and connected with the bottom plate (22), and the bottom windshield (2) The two ends are connected with the side plate (21), A bottom guide space (35) is formed between the heat exchange element (14), the bottom plate (22), the side plate (21) and the bottom windshield (2), and the bottom guide The space (35) communicates with the second air passage and one of the outdoor air passage holes (7, 8), The heat exchange element (14) includes an inner side (141) facing the first volute (15), The first space (36) is composed of the bottom windshield (2), the bottom plate (22), the inner surface (141) of the heat exchange element (14), the first inner partition (3 ), the outer surface of the side plate (21) and the first volute (15) is formed. 3. The heat exchange device according to claim 1, wherein: The plurality of heat exchange elements (14) are arranged in an L shape or a U shape. 4. The heat exchange device according to claim 1, characterized in that, It also includes a second inner partition (4), which is located below the first inner partition (3) and between the side plate (21) and the inner surface (141) of the heat exchange element (14) , The first space (32) is composed of the second internal partition (4), the inner surface (141) of the heat exchange element (14), the first internal partition (3), the side plate (21 ) and the outer surface of the first volute (15) is formed. 5. The heat exchange device according to claim 1, wherein: It also includes a power supply box (41) installed on the outside of the casing (20) and on the side plate (21), and the plurality of heat exchange elements (14) are located in the casing (20) close to The position of the power supply box (41). 6. The heat exchange device according to claim 1, wherein The plurality of heat exchange elements (14) have different pore sizes. 7. The heat exchange device according to claim 6, characterized in that, The side plate (21) includes a plurality of side plate parts (211, 212, 213, 214), and a power supply box (41) is installed on one side plate part (214) of the plurality of side plate parts, located at the installation The heat exchanging element in the middle of the side plate portion (214) of the power supply box (41) has a hole diameter smaller than that of other heat exchanging elements. 8. The heat exchange device according to claim 6, wherein: The side plate (21) includes a plurality of side plate parts (211, 212, 213, 214), and a power supply box (41) is installed on one side plate part (214) of the plurality of side plate parts, located at the installation The heat exchange element having the end portion of the side plate portion (214) of the power supply box (41) has a hole diameter smaller than that of other heat exchange elements. 9. The heat exchange device according to claim 1, wherein: The distance from the first inner partition (3) to the bottom plate (22) is greater than the distance from the first inner partition (3) to the top plate (23). 10. The heat exchange device of claim 1, wherein: A plurality of outdoor side air outlets (47, 48) are provided on the side plate (21) corresponding to the outdoor air passage holes (7, 8), and the plurality of outdoor side air outlets (47, 48 ) have different distances from their respective centers to the base plate (22). 11. The heat exchange device of claim 10, wherein: The connection sections (49) of the outdoor side air outlets (47, 48) respectively connected with the side plates (21) are in the shape of conical rings, and the taper of the connection sections (49) is 4/3.

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