CN220541351U

CN220541351U - Total heat exchanger

Info

Publication number: CN220541351U
Application number: CN202321864014.9U
Authority: CN
Inventors: 都学敏; 赵蕾; 戎晓宁; 漆小宇; 韩飞
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2023-07-14
Filing date: 2023-07-14
Publication date: 2024-02-27
Anticipated expiration: 2033-07-14

Abstract

The application discloses a total heat exchanger belongs to air treatment technical field. The total heat exchanger includes: the shell is provided with a fresh air inlet, a fresh air outlet, an indoor air inlet and an indoor air outlet; the heat exchange core is arranged in the shell and is provided with a fresh air channel and a return air channel, the fresh air channel is communicated between the fresh air inlet and the fresh air outlet, and the return air channel is communicated between the indoor air inlet and the indoor air outlet; the fresh air channel and the return air channel are spiral channels which are arranged side by side; the total heat exchanger enables fresh air in the fresh air channel to exchange heat with indoor air in the return air channel. The total heat exchanger has small occupied area.

Description

Total heat exchanger

Technical Field

The application relates to the technical field of air treatment, in particular to a total heat exchanger.

Background

The total heat exchanger is fresh air and exhaust heat exchange equipment with heat exchange cores, and the current heat exchange cores are basically cuboid or hexagonal, so that the structural form of the total heat exchanger is single, and the total heat exchanger cannot meet the requirements of different application scenes.

Disclosure of Invention

The application provides a total heat exchanger, its heat recovery core is spiral cylindric, has the advantage that area is little when vertical installation.

In one aspect of the present application, an all heat exchanger comprises: the shell is provided with a fresh air inlet, a fresh air outlet, an indoor air inlet and an indoor air outlet; the heat exchange core is arranged in the shell and is provided with a fresh air channel and a return air channel, the fresh air channel is communicated between the fresh air inlet and the fresh air outlet, and the return air channel is communicated between the indoor air inlet and the indoor air outlet; the fresh air channel and the return air channel are spiral channels which are arranged side by side; the total heat exchanger enables outdoor air in the fresh air channel to exchange heat with indoor air in the return air channel.

In some embodiments, the first fresh air channel port and the second fresh air channel port are respectively located at two axial ends of the fresh air channel, and the first return air channel port and the second return air channel port are respectively located at two axial ends of the return air channel.

In some embodiments, a first fresh air channel port is formed in the radially outermost end of the fresh air channel, and a second fresh air channel port is formed in the center of one axial end of the fresh air channel; the center of the axial one end of the return air channel is provided with a first return air channel opening, and the radial outermost end of the return air channel is provided with a second return air channel opening.

In some embodiments, the axis of the heat exchange core is disposed vertically; the total heat exchanger further comprises: the blower and the exhaust fan are respectively positioned at two axial ends of the heat exchange core body.

In another aspect of the present application, an all heat exchanger includes: the shell comprises a first air cavity, a third air cavity, a heat exchange cavity, a fourth air cavity and a second air cavity in sequence from one end to the other end; the heat exchange core is arranged in the heat exchange cavity, the fresh air channel and the return air channel of the heat exchange core are spiral channels which are arranged side by side, the two axial ends of the fresh air channel are respectively provided with a first fresh air channel opening and a second fresh air channel opening, and the two axial ends of the return air channel are respectively provided with a first return air channel opening and a second return air channel opening; the second fresh air passage port and the first return air passage port are positioned at the same end of the heat exchange core body, one of the second fresh air passage port and the first return air passage port is communicated with the first air cavity through the third air cavity, and the other is communicated with the third air cavity; one of the first fresh air channel opening and the second return air channel opening is communicated with the second air cavity through the fourth air cavity, and the other is communicated with the fourth air cavity.

In some embodiments, the first fresh air channel port communicates with the fourth air chamber and the second fresh air channel port communicates with the first air chamber; the first return air channel port is communicated with the third air cavity, and the second return air channel port is communicated with the second air cavity; the total heat exchanger further comprises: the blower is arranged in the first air cavity; the exhaust fan is arranged in the second air cavity.

In yet another aspect of the present application, an all heat exchanger includes: the shell is internally provided with a first sub-air cavity, a second sub-air cavity and a heat exchange cavity; the heat exchange core is arranged in the heat exchange cavity, the fresh air channel and the return air channel of the heat exchange core are spiral channels which are arranged side by side, and the space between the circumference of the heat exchange core and the shell comprises a fresh air sub-air cavity and a return air sub-air cavity which are mutually separated; the radial outermost end of the fresh air channel is provided with a first fresh air channel port, the center of one axial end of the fresh air channel is provided with a second fresh air channel port, the center of one axial end of the return air channel is provided with a first return air channel port, the radial outermost end of the return air channel is provided with a second return air channel port, and the first fresh air channel port and the second return air channel port are staggered on the circumference; the first fresh air passage opening corresponds to the fresh air cavity, and the second return air passage opening corresponds to the return air cavity; the second fresh air passage port is communicated with the first sub-air cavity, and the first return air passage port is communicated with the second sub-air cavity.

In some embodiments, the second sub-plenum is located between the heat exchange cavity and the first sub-plenum; the shell is also internally provided with a third sub-air cavity and a fourth sub-air cavity, the fourth sub-air cavity is positioned at one end of the heat exchange cavity far away from the second sub-air cavity, and the third sub-air cavity is positioned at one end of the fourth sub-air cavity far away from the heat exchange cavity; the fourth sub-air cavity is communicated with the new sub-air cavity, and the return air sub-air cavity is communicated with the third sub-air cavity.

In some embodiments, the second fresh air passage port communicates with the first sub-plenum through a connecting tube positioned within the second sub-plenum.

In some embodiments, further comprising: the purification filter screen is arranged in the fourth sub-air cavity; the blower is arranged in the first sub-air cavity; the exhaust fan is arranged in the second sub-air cavity.

Drawings

FIG. 1 illustrates a schematic diagram of a total heat exchanger, according to some embodiments;

FIG. 2 illustrates a side view of a total heat exchanger in an installed scenario according to some embodiments;

FIG. 3 illustrates a top view of a total heat exchanger in an installed scenario according to some embodiments;

FIG. 4 illustrates a cross-sectional view of a total heat exchanger, according to some embodiments;

FIG. 5 illustrates a cross-sectional view of a heat exchange core of a total heat exchanger, according to some embodiments;

FIG. 6 illustrates a cross-sectional view of a total heat exchanger, according to some embodiments;

FIG. 7 illustrates a cross-sectional view of a heat exchange core of a total heat exchanger according to further embodiments;

FIG. 8 illustrates a transverse cross-sectional view of a total heat exchanger according to further embodiments;

FIG. 9 illustrates a longitudinal cross-sectional view of a total heat exchanger according to further embodiments;

FIG. 10 illustrates a longitudinal cross-sectional view of a total heat exchanger according to still further embodiments;

in the above figures, 100, total heat exchanger; 10. a housing; 11. a fresh air inlet; 12. a fresh air outlet; 13. an indoor air inlet; 14. an indoor air outlet; 151. a first partition plate; 152. a second partition plate; 161. a first air chamber; 1611. a first sub-wind chamber; 1612. a second sub-wind chamber; 162. a heat exchange chamber; 1621. a new fan air cavity; 1622. the air return sub-air cavity; 163. a second air chamber; 1631. a third sub-air chamber; 1632. a fourth sub-air chamber; 171. a first separator; 172. a second separator; 181. a third air chamber; 182. a fourth air chamber; 19. a connecting pipe; 20. a heat exchange core; 21. a fresh air channel; 211. a first fresh air channel port; 212. the second fresh air channel port; 22. a return air channel; 221. a first return air passage opening; 222. a second return air passage opening; 31. a blower; 32. an exhaust fan; 40. purifying the filter screen.

Detailed Description

For purposes of clarity and implementation of the present application, the following description will make clear and complete descriptions of exemplary implementations of the present application with reference to the accompanying drawings in which exemplary implementations of the present application are illustrated, it being apparent that the exemplary implementations described are only some, but not all, of the examples of the present application.

In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any particular number of features being indicated. Thus, a feature defining "a first", "a second" or the like may include one or more such features, either explicitly or implicitly. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The total heat exchanger is an efficient and energy-saving heat recovery device, and pre-cooling or pre-heating the introduced fresh air by recovering the waste heat of the exhaust gas.

The working principle is as follows: when the product works, indoor exhaust air and fresh air flow through the heat exchange core body, and the total heat exchange process is caused at the heat exchange core body due to the temperature difference and the steam partial pressure difference of the two air flows. When the air conditioner runs in summer, the fresh air obtains cold energy from air exhaust of the air conditioner, so that the temperature is reduced, and meanwhile, the fresh air is dried by the air conditioner, so that the moisture content of the fresh air is reduced; when the air conditioner runs in winter, fresh air is exhausted from the air conditioning chamber to obtain heat, and the temperature is increased. Therefore, the fresh air is enabled to recover energy from air-conditioning exhaust through the total heat exchange process of the heat exchange core body.

Referring to fig. 1 to 4, the total heat exchanger 100 according to the embodiment of the present application includes a housing 10 and a spiral cylindrical heat exchange core 20.

The casing 10 constitutes the external appearance of the total heat exchanger, and the casing 10 may be rectangular parallelepiped-shaped or cylindrical-shaped. In the present example, the housing 10 is cylindrical and may be used in a vertical installation, and the cylindrical design may allow for a smaller footprint for the product.

Four air openings, namely a fresh air inlet 11, a fresh air outlet 12, an indoor air inlet 13 and an indoor air outlet 14, are formed in the shell 10.

Wherein, referring to fig. 6, the fresh air inlet 11 and the indoor air outlet 14 are provided at the lower portion of the housing 10; an indoor air inlet 13 and a fresh air outlet 12 are provided at the upper portion of the housing 10, and the indoor air inlet 13 and the fresh air outlet 12 are spaced apart to avoid return air and fresh air from flowing in series.

In the application scenario of the present application, referring specifically to fig. 2 and 3, the total heat exchanger 100 is used as a vertical cabinet, and only the fresh air inlet 11 and the indoor air outlet 14 need to be connected to an air duct, and the air duct extends to the outside.

Because only need assemble during the installation two shorter tuber pipes can, compare in prior art horizontal total heat exchanger furred ceiling need hoist and mount, four tuber pipes of assembly and the complicated problem of installation that leads to when installing, this application has the advantage of installation simplicity.

The heat exchange core 20 can be designed into a vertical cabinet type machine with small occupied area, and benefits from the cylindrical structure of the heat exchange core. The heat exchange core 2 comprises a fresh air channel 21 and a return air channel 22, the fresh air channel 21 and the return air channel 22 are spiral channels which are arranged side by side, and referring to the spiral structure in fig. 4, wherein solid gray represents the return air channel 22, hollow white represents the fresh air channel 21, and materials forming the channels can perform heat and humidity transfer, so that heat recovery is realized.

Referring to fig. 6, 9 and 10, the heat exchange core 20 is vertically disposed within the housing 10, i.e., the axis of the heat exchange core 20 is vertical.

The fresh air channel 21 of the heat exchange core 20 communicates the fresh air inlet 11 with the fresh air outlet 12, and the return air channel 22 of the heat exchange core 20 communicates the indoor air inlet 12 with the indoor air outlet 14.

The blower 21 and the exhaust fan 32 are respectively connected to both ends of the heat exchange core 20 in the axial direction. In the present example, the blower 21 is located above the heat exchange core 20, and the exhaust fan 32 is located below the heat exchange core 20 to achieve the feeding of fresh air from above and the exhausting of indoor air from below.

The blower 21 and the exhaust fan 32 are located at two vertical ends of the heat exchange core 20, so that the vertical size of the total heat exchanger is increased, but the transverse size of the total heat exchanger is not increased, so that the transverse occupied area of the total heat exchanger is not increased, and the heat exchange core has the advantage of small occupied area compared with a structure in which the blower and the heat exchange core 20 are transversely arranged.

Specifically, the blower 21 is disposed corresponding to the fresh air outlet 12, and the exhaust fan 32 is disposed corresponding to the indoor air outlet 14. When the blower 21 works, outdoor air enters the machine from the fresh air inlet 11, passes through the fresh air channel 21 of the heat exchange core 20 and is sent to the room from the fresh air outlet 12; when the exhaust fan 22 works, indoor air enters from the indoor air inlet 13 and is discharged to the outside from the indoor air outlet 14 after passing through the return air channel 22 of the heat exchange core 20. The outdoor air and the indoor air exchange heat at the heat exchange core 20 to realize the energy recovery of the fresh air to the return air.

In some embodiments of the present application, referring to fig. 5, two axial ends of the heat exchange core 20 are channel ports, a lower end of the fresh air channel 21 is a first fresh air channel port 211, and an upper end of the fresh air channel 21 is a second fresh air channel port 212; the upper end of the return air channel 22 is a first return air channel opening 221, and the lower end of the return air channel 22 is a second return air channel opening 222. The first fresh air channel port 211, the second fresh air channel port 212, the first return air channel port 221 and the second return air channel port 222 are all threaded.

The two axial ends of the fresh air channel 21 and the two axial ends of the return air channel 22 are staggered, that is, the lower end of the heat exchange core 20, the first fresh air channel port 211 is lower or higher than the second return air channel port 222; the upper end of the heat exchange core 20 is lower or higher than the first return air passage opening 221 of the second fresh air passage opening 212.

Referring to fig. 6, a first partition plate 151, a second partition plate 152, a first partition plate 171, and a second partition plate 172 are arranged in the housing 10 in a lateral direction. Wherein, first division plate 181 and second division plate 152 are located the both ends department of axial of heat exchange core 20 respectively, and first baffle 171 and second baffle 172 cover are located on the heat exchange core 20.

The first partition plate 151, the second partition plate 152, the first partition plate 171 and the second partition plate 172 divide the interior of the housing 10 into five air chambers, two air chambers at the upper end are a first air chamber 161 and a third air chamber 181, and two air chambers at the lower end are a second air chamber 163 and a fourth air chamber 182.

The second fresh air channel port 212 is communicated with the first air return channel port 221 in a one-to-one correspondence manner to the first air cavity 161 and the third air cavity 181, wherein the air cavity communicated with the second fresh air channel port 212 is the first air cavity 161, and the air cavity communicated with the first air return channel port 221 is the third air cavity 181. For example, in the present example, the second fresh air channel port 212 is higher than the first return air channel port 221, and then the first air chamber 161 is located above the third air chamber 181; in other embodiments, the second fresh air channel 212 is lower than the first return air channel 221, and then the first air chamber 161 is located below the third air chamber 181.

Similarly, the first fresh air channel port 211 and the second return air channel port 222 are correspondingly communicated with the second air cavity 163 and the fourth air cavity 182, wherein the air cavity communicated with the first fresh air channel port 211 is the fourth air cavity 182, and the air cavity communicated with the second return air channel port 222 is the second air cavity 163.

One of the fresh air inlet 11 and the fresh air outlet 12 corresponds to the fourth air chamber 182, and the other corresponds to the first air chamber 161; one of the indoor air inlet 13 and the indoor air outlet 14 corresponds to the third air chamber 181, and the other corresponds to the second air chamber 163.

The blower 31 is disposed in the air chamber corresponding to the fresh air outlet 12, and the exhaust fan 32 is disposed in the air chamber corresponding to the indoor air outlet 14.

Illustratively, at the upper end of the heat exchange core 20, the second fresh air channel port 212 is higher than the first return air channel port 221, the first partition plate 151 is correspondingly located at the second fresh air channel port 212, and a spiral line opening opposite to the second fresh air channel port 212 is disposed on the first partition plate 151, so that the second fresh air channel port 212 is communicated with the first air cavity 161; alternatively, the first partition plate 151 is provided with a spiral line opening, and the second fresh air channel port 212 passes through the spiral line opening and into the first air chamber 161. The first partition 171 corresponds to the first return air passage opening 222, or the first partition 171 is positioned at a lower side of the first return air passage opening 222 such that the first return air passage opening 222 is positioned within the third air chamber 181.

The second air return passage opening 222 is lower than the first fresh air passage opening 211 at the lower end of the heat exchange core 20, and the second partition plate 151 is correspondingly arranged at the second air return passage opening 222; or the second partition 151 is located at an upper side of the second return air passage opening 222 such that the second return air passage opening 222 protrudes into the second air cavity 163. The second partition 172 corresponds to the first fresh air passage port 211, or the second partition 172 is located at an upper side of the first fresh air passage port 211.

Because the space between the first air chamber 161 and the second air chamber 163 is relatively large, the blower 31 can be arranged in the first air chamber 161, the exhaust fan 32 can be arranged in the second air chamber 163, the fresh air inlet 11 is correspondingly arranged on the side wall forming the fourth air chamber 182, and the fresh air outlet 12 is arranged on the side wall forming the first air chamber 161; the indoor air inlet 13 is provided on a side wall forming the third air chamber 181, and the indoor air outlet 14 is provided on a side wall forming the second air chamber 163.

The outdoor fresh air is introduced from the outdoor through an air pipe, enters a fourth air cavity 182 through a fresh air inlet 11, then enters a fresh air channel 21, flows upwards along the channel, exchanges heat and humidity with return air of another channel in the flowing process, then reaches a blower 31 at the top, and is driven by the blower 31 to be sent into a room;

the indoor return air enters the third air cavity 181 through the indoor air inlet 13, then enters the return air channel 22, flows downwards along the channel, exchanges heat and humidity with fresh air of another channel in the flowing process, then reaches the exhaust fan 32 at the bottom, and is discharged outdoors under the driving of the exhaust fan 32.

In some embodiments of the present application, referring to fig. 7 to 9, the radially outermost end of the fresh air channel 21 is circumferentially offset from the radially outermost end of the return air channel 22; the radially outermost end of the fresh air channel 21 is provided with a first fresh air channel port 211, and the center of one axial end of the fresh air channel 21 is provided with a second fresh air channel port 212; the center of the axial end of the return air channel 22 is provided with a first return air channel opening 221, and the radial outermost end of the return air channel 22 is provided with a second return air channel opening 222.

The inner space of the case 10 is partitioned by the first and second partition plates 151, 152 into a first air chamber 161, a heat exchange chamber 162, and a second air chamber 163, the first and second air chambers 161, 163 being located at both ends of the heat exchange chamber 162; the heat exchange core 20 is located within the heat exchange chamber 162.

One of the second fresh air channel port 212 and the second return air channel port 222 is communicated with the first air cavity 161, and the other is communicated with the second air cavity 163.

The space between the circumferential portion of the heat exchange core 20 and the housing 10 includes a fresh air fan chamber 1621 and a return air fan chamber 1622 that are spaced apart from each other. The first fresh air duct port 211 communicates with the fresh air plenum 1621 and the first return air duct port 221 communicates with the return air plenum 1622.

Illustratively, the first plenum 161 is located above the heat exchange chamber 162 and the second plenum 163 is located below the heat exchange chamber 162. The first partition plate 151 is arranged at the second fresh air channel port 212, and an opening is arranged on the second partition plate 151, so that the second fresh air channel port 212 is communicated with the first air cavity 161; the second partition plate 152 is disposed at the second air return passage opening 222, and an opening is disposed on the second partition plate 152, so that the second air return passage opening 212 communicates with the second air cavity 163.

In some embodiments of the present application, referring to fig. 7, 8 and 10, the radially outermost end of the fresh air channel 21 is circumferentially offset from the radially outermost end of the return air channel 22; the radially outermost end of the fresh air channel 21 is provided with a first fresh air channel port 211, and the center of one axial end of the fresh air channel 21 is provided with a second fresh air channel port 212; the center of the axial end of the return air channel 22 is provided with a first return air channel opening 221, and the radial outermost end of the return air channel 22 is provided with a second return air channel opening 222.

The first wind chamber 161 is in turn divided into a first sub-wind chamber 1611 and a second sub-wind chamber 1612, and the second wind chamber 163 is in turn divided into a third sub-wind chamber 1631 and a fourth sub-wind chamber 1632.

One of the first fresh air channel port 211 and the second fresh air channel port 212 communicates with the first sub-chamber 1611 and the fourth sub-chamber 1632, and one of the first return air channel port 221 and the second return air channel port 222 communicates with the second sub-chamber 1612 and the third sub-chamber 1631.

Illustratively, the first sub-plenum 1611 is uppermost and the second sub-plenum 1612 is between the first sub-plenum 1611 and the heat exchange plenum 162; the third sub-chamber 1631 is located at the lowermost end and the fourth sub-chamber 1632 is located between the third sub-chamber 1631 and the heat exchange chamber 162.

The fresh air cavity 1621 communicates with the fourth sub-cavity 1632 such that the first fresh air channel port 211 communicates with the fourth sub-cavity 1632, and the fresh air inlet 11 is provided on a side wall forming the fourth sub-cavity 1632; the second fresh air passage port 212 is communicated with the first sub-air chamber 1611 through a connecting pipe 19, the connecting pipe 19 extends from the second fresh air passage port 212 to the first sub-air chamber 1611 through the second sub-air chamber 1612, and the fresh air outlet 12 is arranged on the side wall forming the first sub-air chamber 1611.

A purifying filter 40, such as a primary filter and a HEPA filter, may be disposed in the fourth sub-air chamber 1632 to filter the purified fresh air, thereby ensuring the quality of the fresh air fed into the room.

The first air return channel opening 221 is communicated with the second sub-air cavity 1612, and the indoor air inlet 13 is arranged on the side wall forming the second sub-air cavity 1612; the return air sub-chamber 1622 communicates with the third sub-chamber 1631 such that the second return air passage port 222 communicates with the third sub-chamber 1631 through the return air sub-chamber 1622, and the indoor air outlet 14 is provided on a sidewall forming the third sub-chamber 1631.

After entering the fourth sub-air chamber 162 from the fresh air inlet 11 and being filtered by the purifying filter screen 40, the outdoor fresh air enters the vertical first fresh air channel port 211, then reaches a central area along a spiral line channel (from outside to inside) on a horizontal plane, performs heat-moisture exchange with return air of another channel in the spiral line channel, flows upwards in the central area to reach the blower 31, and then is sent into a room;

the indoor return air enters the first return air passage opening 221 of the central area from the indoor air inlet 13, then reaches the central area along a spiral line channel (from inside to outside) on the horizontal plane, performs heat and moisture exchange with the fresh air of the other channel in the spiral line channel, flows downwards in a vertical area on the side surface to reach the exhaust fan 32, and then is discharged outdoors.

According to the first concept of the present application, since the heat exchange core 20 is provided in the shape of a spiral cylinder, in the case of a comparable heat exchange area, the volume of the spiral cylinder is smaller than that of a rectangular parallelepiped, so that the overall structure is more compact.

According to the second concept of the present application, since the heat exchange core 20 is provided in the shape of a spiral cylinder, it is convenient to make the total heat exchanger in a stand-up structure, which has the advantage of small occupied area.

According to the third conception of the present application, since the heat exchange core 20 is set to be in a spiral cylindrical shape, the total heat exchanger is convenient to be made into a stand-up structure, and only two air pipes need to be connected at the fresh air inlet 11 and the indoor air outlet 14 during installation, compared with the problem that the installation is complicated due to the fact that the four air pipes need to be hoisted and assembled during the installation of the horizontal total heat exchanger suspended ceiling in the prior art, the present application has the advantage of simple installation.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

The foregoing description, for purposes of explanation, has been presented in conjunction with specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the embodiments to the precise forms disclosed above. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles and the practical application, to thereby enable others skilled in the art to best utilize the embodiments and various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A total heat exchanger, comprising:

the shell is provided with a fresh air inlet, a fresh air outlet, an indoor air inlet and an indoor air outlet;

the heat exchange core is arranged in the shell and is provided with a fresh air channel and a return air channel, the fresh air channel is communicated between the fresh air inlet and the fresh air outlet, and the return air channel is communicated between the indoor air inlet and the indoor air outlet;

the fresh air channel and the return air channel are spiral channels which are arranged side by side;

the total heat exchanger enables fresh air in the fresh air channel to exchange heat with indoor air in the return air channel.

2. The total heat exchanger of claim 1, wherein the first fresh air passage port and the second fresh air passage port are provided at axial ends of the fresh air passage, and the first return air passage port and the second return air passage port are provided at axial ends of the return air passage.

3. The total heat exchanger according to claim 1, wherein a first fresh air passage port is formed at the radially outermost end of the fresh air passage, and a second fresh air passage port is formed at the center of one axial end of the fresh air passage;

the center of the axial one end of the return air channel is provided with a first return air channel opening, and the radial outermost end of the return air channel is provided with a second return air channel opening.

4. The total heat exchanger of claim 1, wherein the axis of the heat exchange core is disposed vertically;

the total heat exchanger further comprises:

the air blower and the exhaust fan are respectively positioned at two axial ends of the heat exchange core body.

5. A total heat exchanger, comprising:

the shell comprises a first air cavity, a third air cavity, a heat exchange cavity, a fourth air cavity and a second air cavity in sequence from one end to the other end;

the heat exchange core is arranged in the heat exchange cavity, a fresh air channel and a return air channel of the heat exchange core are spiral channels which are arranged side by side, two axial ends of the fresh air channel are respectively provided with a first fresh air channel opening and a second fresh air channel opening, and two axial ends of the return air channel are respectively provided with a first return air channel opening and a second return air channel opening;

the second fresh air passage port and the first return air passage port are positioned at the same end of the heat exchange core body, one of the second fresh air passage port and the first return air passage port is communicated with the first air cavity through the third air cavity, and the other is communicated with the third air cavity;

one of the first fresh air channel opening and the second return air channel opening is communicated with the second air cavity through the fourth air cavity, and the other is communicated with the fourth air cavity.

6. The total heat exchanger of claim 5, wherein the first fresh air port communicates with the fourth air chamber and the second fresh air port communicates with the first air chamber;

the first return air channel port is communicated with the third air cavity, and the second return air channel is communicated with the second air cavity;

the total heat exchanger further comprises:

the blower is arranged in the first air cavity and used for driving fresh air to flow;

and the exhaust fan is arranged in the second air cavity and used for driving indoor air to flow.

7. A total heat exchanger, comprising:

the shell is internally provided with a first sub-air cavity, a second sub-air cavity and a heat exchange cavity;

the heat exchange core is arranged in the heat exchange cavity, and a fresh air channel and a return air channel of the heat exchange core are spiral channels which are arranged side by side;

the radial outermost end of the fresh air channel is provided with a first fresh air channel port, the center of one axial end of the fresh air channel is provided with a second fresh air channel port, the center of one axial end of the return air channel is provided with a first return air channel port, the radial outermost end of the return air channel is provided with a second return air channel port, and the first fresh air channel port and the second return air channel port are staggered on the circumference;

the space between the circumference of the heat exchange core body and the shell comprises a fresh air sub-air cavity and a return air sub-air cavity which are mutually separated; the first fresh air channel opening corresponds to the fresh air fan cavity, and the second return air channel opening corresponds to the return air fan cavity;

the second fresh air passage port is communicated with the first sub-air cavity, and the first return air passage port is communicated with the second sub-air cavity.

8. The total heat exchanger of claim 7, wherein the second sub-plenum is located between the heat exchange plenum and the first sub-plenum;

a third sub-air cavity and a fourth sub-air cavity are further arranged in the shell, the fourth sub-air cavity is positioned at one end of the heat exchange cavity far away from the second sub-air cavity, and the third sub-air cavity is positioned at one end of the fourth sub-air cavity far away from the heat exchange cavity;

the fourth sub-wind cavity is communicated with the fresh wind sub-wind cavity, and the third sub-wind cavity is communicated with the return wind sub-wind cavity.

9. The total heat exchanger of claim 8, wherein the second fresh air passage port communicates with the first sub-plenum through a connecting tube, the connecting tube being located within the second sub-plenum.

10. The total heat exchanger of claim 8, further comprising:

the purification filter screen is arranged in the fourth sub air cavity and is used for filtering fresh air;

the blower is arranged in the first sub-air cavity and used for driving fresh air to flow;

the exhaust fan is arranged in the second sub-air cavity and used for driving indoor air to flow.