CN111536588A - Total heat exchange assembly, fresh air unit and control method of fresh air unit - Google Patents
Total heat exchange assembly, fresh air unit and control method of fresh air unit Download PDFInfo
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- CN111536588A CN111536588A CN202010374167.XA CN202010374167A CN111536588A CN 111536588 A CN111536588 A CN 111536588A CN 202010374167 A CN202010374167 A CN 202010374167A CN 111536588 A CN111536588 A CN 111536588A
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- fresh air
- heat exchange
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000012528 membrane Substances 0.000 claims abstract description 5
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 230000009365 direct transmission Effects 0.000 claims description 3
- 230000009349 indirect transmission Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
- F24F1/0014—Indoor units, e.g. fan coil units characterised by air outlets having two or more outlet openings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0035—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room
- F24F1/0038—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room in combination with simultaneous exhaustion of inside air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides a total heat exchange assembly, a fresh air unit and a control method of the fresh air unit. The total heat exchange assembly comprises a plurality of airflow layers, wherein part of the airflow layers form a fresh air layer, the rest of the airflow layers form a return air layer, the fresh air layer and the return air layer are arranged at intervals, and a total heat exchange membrane is arranged between the adjacent fresh air layer and the adjacent return air layer. According to the total heat exchange assembly, the fresh air unit and the control method of the fresh air unit, the fresh air duct and the return air duct are stacked, and the air inlet and outlet directions are arranged in four directions, so that the volume is reduced on the premise of ensuring the ventilation quantity of the air duct, the arrangement space of the fan assembly is doubled after the total heat exchange assembly is eccentrically arranged, the volume of the shell can be reduced as much as possible under the condition that the size of the fan is not changed, the width of the air duct is gradually changed and is matched with two fans with different air quantities, the flow field and the air quantity coverage area of the air duct are greatly improved, and multiple air outlet modes are realized.
Description
Technical Field
The invention relates to the technical field of air processing equipment, in particular to a total heat exchange assembly, a fresh air handling unit and a control method of the fresh air handling unit.
Background
The total-heat fresh air ventilator needs 2 air channels due to the fact that fresh air and return air bidirectional airflow exists at the same time, structural space is limited, a large fresh air unit in the market can only use a compact single-fan structure (SYB series outer rotor fan) with a fan arranged in a motor, the total-heat fresh air ventilator cannot be like a single-phase flow unit, like a wall cabinet fan coil, a double-shaft motor drives a plurality of small fans, the requirement of a medium-large air volume unit is met, and the problem that the volume of the medium-large fresh air unit is too large is caused.
Disclosure of Invention
In order to solve the technical problem that an occupied space is too large due to the fact that two air channels are needed in a total heat exchange core body in the prior art, the total heat exchange assembly, the fresh air handling unit and the control method of the fresh air handling unit are provided, wherein the two air channels are stacked and the air inlets and the air outlets are distributed in four directions, so that the volume is reduced on the premise that the air volume of the air channels is guaranteed.
A total heat exchange assembly comprises a plurality of airflow layers, wherein part of the airflow layers form a fresh air layer, the rest of the airflow layers form a return air layer, the fresh air layer and the return air layer are arranged at intervals, a total heat exchange membrane is arranged between the adjacent fresh air layer and the return air layer, a fresh air outlet of the fresh air layer faces a first direction, a fresh air inlet of the fresh air layer faces a second direction, a return air inlet of the return air layer faces a third direction, and a return air outlet of the return air layer faces a fourth direction.
The cross-section of total heat exchange assembly is the rectangle, the rectangle has adjacent first limit, second limit, third limit and fourth side in proper order, the new trend air outlet on new trend layer is in first limit, the new trend air intake on new trend layer is in the second limit, the return air intake on return air layer is in the third limit, the return air outlet on return air layer is in the fourth side.
The air flow layer is internally provided with a plurality of air ducts, all the air ducts are arranged in parallel in the length direction of the rectangular first diagonal line, and the width of all the air ducts is gradually increased.
The cross section of the air duct is L-shaped, and the vertexes of all the L-shapes are positioned on the first diagonal line.
The section of the air duct is arc-shaped, and the circle centers of all the arc-shaped air ducts are in the same point with one end point of the first diagonal line.
In the new wind layer, the width in wind channel is followed first diagonal's positive direction gradually increases the return air layer, the width in wind channel is followed first diagonal's negative direction gradually increases.
A fresh air handling unit comprises the total heat exchange assembly.
The fresh air handling unit further comprises a shell, the total heat exchange assembly is arranged inside the shell, the fresh air outlet is located on the first side face of the shell, the fresh air inlet is located on the second side face of the shell, the return air inlet is located on the third side face of the shell, and the return air outlet is located on the fourth side face of the shell.
The shell is of a cuboid structure, and the first side face, the second side face, the third side face and the fourth side face are sequentially connected to form the peripheral side face of the cuboid structure.
The total heat exchange assembly is eccentrically arranged in the shell.
The fresh air handling unit further comprises two fan assemblies, one of the fan assemblies is arranged at the fresh air outlet, and the other of the fan assemblies is arranged at the return air outlet.
The fan assembly comprises a first fan and a second fan, the first fan and the second fan are arranged in parallel, and the air output of the first fan is greater than that of the second fan.
The fan assembly further comprises a driving motor, the driving motor is arranged between the first fan and the second fan, and an output shaft of the driving motor is in direct or indirect transmission connection with the first fan and the second fan.
The cross section of the total heat exchange assembly is rectangular, a plurality of air channels are arranged in the airflow layer, the width of all the air channels is gradually increased in the length direction of a first diagonal line of the rectangle, and the second fan, the driving motor and the first fan are sequentially arranged in the width increasing direction of the air channels.
Fresh air unit still includes four baffles, full heat exchange assembly's cross-section is the rectangle, each the one end of baffle with a rectangular summit seals the setting, and the other end seals the setting with the corresponding side edge of cuboid structure.
The control method of the fresh air handling unit comprises the following steps that the fan assembly comprises a first fan and a second fan, the first fan and the second fan are arranged in parallel, the air output of the first fan is greater than that of the second fan, and the control method comprises the following steps:
setting a first air volume demand value m and a second air volume demand value n, wherein m is less than n, acquiring a real-time air volume demand value Q, and comparing Q with m and n;
when Q is less than or equal to m, the second fan is in an open state, and the first fan is in a closed state;
when m is larger than Q and is less than or equal to n, the first fan is in an open state, and the second fan is in a closed state;
and when n is less than or equal to Q, the first fan and the second fan are both in an opening state.
According to the total heat exchange assembly, the fresh air unit and the control method of the fresh air unit, the fresh air duct and the return air duct are stacked, and the air inlet and outlet directions are arranged in four directions, so that the volume is reduced on the premise of ensuring the air volume of the air duct, the arrangement space of the fan assembly is doubled after the total heat exchange assembly is eccentrically arranged, the volume of the shell can be reduced as much as possible under the condition that the size of the fan is not changed, the arrangement is compact, the width of the air duct is gradually changed and is matched with two fans with different air volumes, the flow field and the air volume coverage area of the air duct are greatly improved, and various air outlet modes are realized.
Drawings
Fig. 1 is a schematic structural diagram of a total heat exchange assembly, a fresh air handling unit, and a control method of the fresh air handling unit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a fresh air layer or a return air layer of an embodiment of a total heat exchange assembly, a fresh air handling unit and a control method of the fresh air handling unit provided by the invention;
fig. 3 is a schematic structural diagram of a fresh air handling unit according to an embodiment of a total heat exchange assembly, a fresh air handling unit and a control method of the fresh air handling unit provided by the present invention;
in the figure:
1. a fresh air layer; 2. an air return layer; 3. an air duct; 4. a housing; 5. a fan assembly; 51. a first fan; 52. a second fan; 53. a drive motor; 6. a partition plate; 11. a total heat exchange assembly.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The total heat exchange assembly as shown in fig. 1 and fig. 2 comprises a plurality of airflow layers, wherein part of the airflow layers form a fresh air layer 1, outdoor fresh air enters the room through the fresh air layer 1, the rest of the airflow layers form a return air layer, indoor return air is discharged out of the room through the return air layer, the fresh air layer 1 and the return air layer are arranged at intervals, a total heat exchange membrane is arranged between the adjacent fresh air layer 1 and the return air layer, so that the fresh air and the return air can exchange heat and/or humidity through the total heat exchange membrane, a fresh air outlet of the fresh air layer 1 faces a first direction, a fresh air inlet of the fresh air layer 1 faces a second direction, a return air inlet of the return air layer faces a third direction, a return air outlet of the return air layer faces a fourth direction, the fresh air layer 1 and the return air layer are stacked, and the directions of the fresh air inlet, the fresh air outlet and the return air inlet and the return air outlet are different from each other, the space of the air inlet and outlet duct is doubled, so that the volume of the total heat exchange assembly is reduced as much as possible on the premise of ensuring the same air quantity.
The cross-section of total heat exchange assembly 11 is the rectangle, the rectangle has adjacent first limit, second limit, third limit and fourth side in proper order, the new trend air outlet of new trend layer 1 is in first limit, the new trend air intake of new trend layer 1 is in the second limit, the return air intake of return air layer is in the third limit, the return air outlet of return air layer is in the fourth limit increases the wind channel space, and is preferred, total heat exchange assembly 11's cross-section is the square.
The air flow layer is internally provided with a plurality of air channels 3, all the air channels 3 are arranged in parallel in the length direction of the rectangular first diagonal line, and the width of all the air channels 3 is gradually increased, so that the flow field distribution of the total heat exchange assembly 11 is effectively improved, and the air field is more uniform.
The section of the air duct 3 is L-shaped, and all vertexes of the L-shaped air duct are positioned on the first diagonal line, namely the fresh air and the return air are baffled by 90 degrees in the air duct 3, so that the retention time in the air duct 3 is prolonged, the sufficient heat exchange of the fresh air and the return air is ensured, and meanwhile, the arrangement of a fresh air inlet/outlet and a return air inlet/outlet is convenient when the total heat exchange component 11 is used.
The section of wind channel 3 is the arc, and all the centre of a circle of arc all with an extreme point of first diagonal is the same point, increases new trend and return air at the inside flow distance in wind channel 3 as far as possible, reduces new trend and return air simultaneously and because of the baffling reason for producing the noise in wind channel 3 is inside.
In fresh air layer 1, the width in wind channel 3 is followed the positive direction of first diagonal line increases gradually the return air layer, the width in wind channel 3 is followed the negative direction of first diagonal line increases gradually, and the position that the width is big and the density is little that the position that also is little and the density is big from the position that also is the width of fresh air channel 3 corresponds return air channel 3, and the position that the width is little and the density is big that the position that the width is big and the density is little corresponds return air channel 3 of fresh air channel 3 to fully guarantee the heat transfer between new trend and the return air.
A fresh air handling unit as shown in fig. 3 includes the total heat exchange assembly 11 described above.
Fresh air unit still includes casing 4, total heat exchange assembly 11 set up in inside casing 4, the fresh air outlet is in the first side of casing 4, the fresh air intake is in the second side of casing 4, the return air intake is in the third side of casing 4, the return air outlet is in on the fourth side of casing 4 to furthest's the volume of utilizing casing 4 effectively increases the arrangement space of the inside fan subassembly of casing 4, thereby the effectual volume that reduces casing 4 under the condition of using the same fan subassembly.
The casing 4 is a cuboid structure, the first side face, the second side face, the third side face and the fourth side face are sequentially connected to form the peripheral side face of the cuboid structure, namely each side face of the cuboid structure forms an air port, the height of the air port can be reduced on the premise of the same air volume, and therefore the height of the casing 4 is reduced.
The total heat exchange assembly 11 is eccentrically arranged in the shell 4, and the installation space of the fan assembly is provided to the maximum extent.
The fresh air handling unit further comprises two fan assemblies 5, one fan assembly 5 is arranged at the fresh air outlet, the other fan assembly 5 is arranged at the return air outlet, namely one fan assembly 5 provides power for the fresh air flow, and the other fan assembly 5 provides power for the return air flow.
The fan assembly 5 further includes a driving motor 53, the driving motor 53 is disposed between the first fan 51 and the second fan 52, and an output shaft of the driving motor 53 is in direct or indirect transmission connection with both the first fan 51 and the second fan 52, so that the driving motor 53 can drive the first fan 51 or the second fan 52 independently, and can also drive the first fan 51 and the second fan 52 simultaneously.
The cross section of the total heat exchange assembly 11 is rectangular, a plurality of air channels 3 are arranged in the air flow layer, the width of all the air channels 3 is gradually increased in the length direction of a first diagonal line of the rectangle, and in the width increasing direction of the air channels 3, the second fan 52, the driving motor 53 and the first fan 51 are sequentially arranged, that is, the arrangement sequence of the second fan 52, the driving motor 53 and the first fan 51 is arranged according to the corresponding air port width increasing direction, so that the second fan 52 with small air volume corresponds to the air channel 3 with small width and large density, and the first fan 51 with large air volume corresponds to the air channel 3 with large width and small density, thereby ensuring that the air volume is in an optimal state in any air volume adjusting mode.
Fresh air unit still includes four baffles 6, total heat exchange assembly 11's cross-section is rectangle, each the one end of baffle 6 with the sealed setting in rectangular summit, the other end and the sealed setting of the corresponding side edge of cuboid structure also utilize baffle 6 to seal the setting between the internal surface of total heat exchange assembly 11 and casing 4, and form new trend air inlet duct 3, new trend air outlet duct 3, return air inlet duct 3 and return air outlet duct 3 to realize new trend air inlet duct 3, new trend air outlet duct 3, return air inlet duct 3, the relative seal between the return air outlet duct 3.
In the control method of the fresh air handling unit, the fan assembly 5 includes a first fan 51 and a second fan 52, the first fan 51 and the second fan 52 are arranged in parallel, and an air output of the first fan 51 is greater than an air output of the second fan 52, and the control method includes:
setting a first air volume demand value m and a second air volume demand value n, wherein m is less than n, acquiring a real-time air volume demand value Q, and comparing Q with m and n;
when Q is less than or equal to m, the second fan 52 is in an on state, and the first fan 51 is in an off state;
when m is more than Q and less than or equal to n, the first fan 51 is in an on state, and the second fan 52 is in an off state;
when n is less than or equal to Q, both the first fan 51 and the second fan 52 are in an on state.
Make new fan unit carry out reasonable regulation according to specific amount of wind demand.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (16)
1. A total heat exchange assembly, comprising: the novel air flow layer heat exchanger comprises a plurality of air flow layers, wherein part of the air flow layers form a fresh air layer (1), the rest part of the air flow layers form an air return layer, the fresh air layer (1) and the air return layer are arranged at intervals, a total heat exchange membrane is arranged between the adjacent fresh air layer (1) and the air return layer, a fresh air outlet of the fresh air layer (1) faces a first direction, a fresh air inlet of the fresh air layer (1) faces a second direction, an air return inlet of the air return layer faces a third direction, and an air return outlet of the air return layer faces a fourth direction.
2. The total heat exchange assembly of claim 1, wherein: the cross-section of total heat exchange assembly (11) is the rectangle, the rectangle has adjacent first limit, second limit, third limit and fourth side in proper order, the new trend air outlet of new trend layer (1) is in first limit, the new trend air intake of new trend layer (1) is in the second limit, the return air intake of return air layer is in the third limit, the return air outlet of return air layer is in the fourth side.
3. The total heat exchange assembly of claim 2, wherein: a plurality of air channels (3) are arranged in the airflow layer, all the air channels (3) are arranged in parallel in the length direction of the rectangular first diagonal line, and the width of all the air channels (3) is gradually increased.
4. The total heat exchange assembly of claim 3, wherein: the cross section of the air duct (3) is L-shaped, and the vertexes of all the L-shapes are positioned on the first diagonal line.
5. The total heat exchange assembly of claim 3, wherein: the section of the air duct (3) is arc-shaped, and the circle centers of all the arc-shaped air ducts are in the same point with one end point of the first diagonal line.
6. The total heat exchange assembly of claim 3, wherein: in new trend layer (1), the width in wind channel (3) is followed the positive direction of first diagonal line increases gradually return air layer, the width in wind channel (3) is followed the negative direction of first diagonal line increases gradually.
7. A fresh air handling unit, its characterized in that: comprising a total heat exchange assembly (11) according to any of claims 1 to 6.
8. The fresh air handling unit of claim 7, wherein: fresh air unit still includes casing (4), full heat exchange assembly (11) set up in inside casing (4), the fresh air outlet is in the first side of casing (4), the fresh air intake is in the second side of casing (4), the return air intake is in the third side of casing (4), the return air outlet is in on the fourth side of casing (4).
9. The fresh air handling unit of claim 8, wherein: the shell (4) is of a cuboid structure, and the first side face, the second side face, the third side face and the fourth side face are sequentially connected to form the peripheral side face of the cuboid structure.
10. The fresh air handling unit of claim 9, wherein: the total heat exchange assembly (11) is eccentrically arranged inside the shell (4).
11. The fresh air handling unit of claim 7, wherein: the fresh air handling unit further comprises two fan assemblies (5), one fan assembly (5) is arranged at the fresh air outlet, and the other fan assembly (5) is arranged at the return air outlet.
12. The fresh air handling unit of claim 11 wherein: the fan assembly (5) comprises a first fan (51) and a second fan (52), the first fan (51) and the second fan (52) are arranged in parallel, and the air output of the first fan (51) is greater than that of the second fan (52).
13. The fresh air handling unit of claim 12, wherein: the fan assembly (5) further comprises a driving motor (53), the driving motor (53) is arranged between the first fan (51) and the second fan (52), and an output shaft of the driving motor (53) is in direct or indirect transmission connection with the first fan (51) and the second fan (52).
14. The fresh air handling unit of claim 13, wherein: the cross section of the total heat exchange assembly (11) is rectangular, a plurality of air channels (3) are arranged in the airflow layer, the width of all the air channels (3) is gradually increased in the length direction of a first diagonal line of the rectangle, and the second fan (52), the driving motor (53) and the first fan (51) are sequentially arranged in the width increasing direction of the air channels (3).
15. The fresh air handling unit of claim 9, wherein: fresh air unit still includes four baffles (6), the cross-section of total heat exchange assembly (11) is the rectangle, each the one end of baffle (6) with a rectangular summit seals up the setting, and the other end seals up with the corresponding side edge of cuboid structure.
16. A control method for the fresh air handling unit according to any one of claims 7 to 15, characterized in that: the fan assembly (5) comprises a first fan (51) and a second fan (52), the first fan (51) and the second fan (52) are arranged in parallel, the air output of the first fan (51) is greater than that of the second fan (52), and the control method comprises the following steps:
setting a first air volume demand value m and a second air volume demand value n, wherein m is less than n, acquiring a real-time air volume demand value Q, and comparing Q with m and n;
when Q is less than or equal to m, the second fan (52) is in an open state, and the first fan (51) is in a closed state;
when m is larger than Q and is less than or equal to n, the first fan (51) is in an on state, and the second fan (52) is in an off state;
when n is less than or equal to Q, the first fan (51) and the second fan (52) are both in an opening state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010374167.XA CN111536588B (en) | 2020-05-06 | 2020-05-06 | Total heat exchange assembly, fresh air unit and control method of fresh air unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010374167.XA CN111536588B (en) | 2020-05-06 | 2020-05-06 | Total heat exchange assembly, fresh air unit and control method of fresh air unit |
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| CN111536588A true CN111536588A (en) | 2020-08-14 |
| CN111536588B CN111536588B (en) | 2021-03-12 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4653574A (en) * | 1983-08-04 | 1987-03-31 | L. B. White Company, Inc. | Air to air heat exchanger |
| CN201262528Y (en) * | 2008-08-13 | 2009-06-24 | 王光能 | Long-life high-efficiency and energy-saving heat exchange core body |
| CN206018900U (en) * | 2016-06-15 | 2017-03-15 | 珠海格力电器股份有限公司 | Total heat exchanger |
| CN207585003U (en) * | 2017-10-24 | 2018-07-06 | 中国建筑科学研究院有限公司 | Total heat exchange core and fresh air ventilator |
| CN110645636A (en) * | 2019-10-30 | 2020-01-03 | 珠海格力电器股份有限公司 | Fresh air conditioner and control method thereof |
-
2020
- 2020-05-06 CN CN202010374167.XA patent/CN111536588B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4653574A (en) * | 1983-08-04 | 1987-03-31 | L. B. White Company, Inc. | Air to air heat exchanger |
| CN201262528Y (en) * | 2008-08-13 | 2009-06-24 | 王光能 | Long-life high-efficiency and energy-saving heat exchange core body |
| CN206018900U (en) * | 2016-06-15 | 2017-03-15 | 珠海格力电器股份有限公司 | Total heat exchanger |
| CN207585003U (en) * | 2017-10-24 | 2018-07-06 | 中国建筑科学研究院有限公司 | Total heat exchange core and fresh air ventilator |
| CN110645636A (en) * | 2019-10-30 | 2020-01-03 | 珠海格力电器股份有限公司 | Fresh air conditioner and control method thereof |
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| CN111536588B (en) | 2021-03-12 |
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