CN220355626U - Antifreezing fresh air handling unit - Google Patents
Antifreezing fresh air handling unit Download PDFInfo
- Publication number
- CN220355626U CN220355626U CN202322085541.6U CN202322085541U CN220355626U CN 220355626 U CN220355626 U CN 220355626U CN 202322085541 U CN202322085541 U CN 202322085541U CN 220355626 U CN220355626 U CN 220355626U
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- China
- Prior art keywords
- fresh air
- hot water
- heat exchanger
- heat exchange
- handling unit
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000007710 freezing Methods 0.000 claims abstract description 11
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 7
- 230000002528 anti-freeze Effects 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 2
- 230000008014 freezing Effects 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model provides an antifreezing fresh air handling unit in the technical field of fresh air units, which comprises a fresh air unit, an intermediate heat exchanger and a heat exchange coil, wherein the heat exchange coil is arranged in the fresh air unit. The fresh air inlet pipe and the fresh air outlet pipe are respectively connected to two sides of the fresh air unit, and the heat exchange coil is arranged between the fresh air inlet pipe and the fresh air outlet pipe. The intermediate heat exchanger is arranged on the fresh air unit, one side of the intermediate heat exchanger is connected with the heat exchange coil pipe through an intermediate medium pipeline, and the other side of the intermediate heat exchanger is respectively connected with a hot water supply pipeline and a hot water return pipeline. According to the utility model, the hot water with high freezing point is prevented from directly contacting with outdoor low-temperature air through the design structure, the water pipe is prevented from freezing and the heat exchange coil pipe is prevented from frost cracking, and the low-grade hot water heat source is utilized to exchange heat with the intermediate heat exchange medium with low freezing point, and because the hot water is not directly contacted with the outdoor air, the hot water heat source can indirectly operate during the period that the fresh air unit does not operate, the circulating water pump does not need to operate all day, and the operation energy consumption is reduced.
Description
Technical Field
The utility model relates to the technical field of fresh air handling units, in particular to an antifreezing fresh air handling unit.
Background
In order to meet the sanitary requirements of indoor personnel, a proper amount of fresh air needs to be fed into an air conditioning heating room, the fresh air fed into the room is generally heated for improving the comfort of the personnel, and a heating source is usually hot water, but when the temperature of outdoor air is very low in a cold climate and a severe cold region, the outdoor fresh air is heated by the hot water, so that the risk of frost cracking of a heat exchange coil is caused, and an equipment pipeline is damaged. In order to prevent the heat exchange coil from being frozen, modes of raising the temperature of hot water supply, maintaining the operation of a water pump for hot water circulation all day and the like are generally adopted, but the modes increase the operation cost and cause a large amount of energy consumption.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to provide an antifreezing fresh air handling unit.
The utility model provides an antifreezing fresh air handling unit which comprises a fresh air handling unit, an intermediate heat exchanger and a heat exchange coil, wherein the heat exchange coil is arranged in the fresh air handling unit;
the two sides of the fresh air unit are respectively connected with a fresh air inlet pipe and a fresh air outlet pipe, and the heat exchange coil is arranged between the fresh air inlet pipe and the fresh air outlet pipe;
the intermediate heat exchanger is arranged on the fresh air unit, one side of the intermediate heat exchanger is connected with the heat exchange coil through an intermediate medium pipeline, and the other side of the intermediate heat exchanger is respectively connected with a hot water supply pipeline and a hot water return pipeline.
In some embodiments, the outdoor fresh air flows into the fresh air unit through the fresh air inlet pipe, and the outdoor fresh air is sent into the room through the fresh air outlet pipe.
In some embodiments, the intermediate medium pipeline comprises an intermediate medium pipeline I and an intermediate medium pipeline II, the intermediate medium pipeline I is provided with a valve, and the intermediate medium pipeline II is provided with the valve and the circulating water pump.
In some embodiments, an intermediate heat exchange medium is arranged in the intermediate medium pipeline, and the intermediate heat exchange medium flows back and forth between the intermediate heat exchanger and the heat exchange coil pipe through the circulating water pump.
In some embodiments, the intermediate heat exchange medium comprises a glycol solution.
In some embodiments, hot water flows into the intermediate heat exchanger through the hot water supply pipe, and the hot water flows back to the heat source through the hot water return pipe.
In some embodiments, the intermediate heat exchanger comprises a plate heat exchanger or a positive displacement heat exchanger.
In some embodiments, the fresh air handling unit and the intermediate heat exchanger are arranged in an integrated design and matching manner.
Compared with the prior art, the utility model has the following beneficial effects:
according to the utility model, two sides of a fresh air unit are respectively connected with a fresh air inlet pipe and a fresh air outlet pipe, and a heat exchange coil is arranged between the fresh air inlet pipe and the fresh air outlet pipe;
one side of the intermediate heat exchanger is connected with the heat exchange coil pipe through an intermediate medium pipeline, and the other side of the intermediate heat exchanger is respectively connected with a hot water supply pipeline and a hot water return pipeline;
through the design structure, hot water with high freezing point can be prevented from directly contacting with outdoor low-temperature air, and water pipe freezing and heat exchange coil frost cracking are prevented;
the low-grade hot water heat source is utilized to exchange heat with the intermediate heat exchange medium with a low freezing point, and because the hot water is not in direct contact with the outdoor air, the hot water heat source can indirectly operate during the period that the fresh air unit does not operate, the circulating water pump does not need to operate all the day, and the operation energy consumption is reduced.
Drawings
Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of the structure of an anti-freezing fresh air handling unit of the utility model;
fig. 2 is a partially enlarged schematic view of the antifreeze fresh air handling unit of the present utility model.
Reference numerals:
medium pipeline I61 of fresh air handling unit 1
Intermediate medium pipeline II 62 of intermediate heat exchanger 2
Fresh air inlet pipe 7 of heat exchange coil 3
Fresh air outlet pipe 8 of circulating water pump 4
Valve 5 hot water supply pipe 9
Intermediate medium pipeline 6 hot water return pipe 10
Detailed Description
The present utility model will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present utility model.
As shown in fig. 1-2, the utility model comprises a fresh air handling unit 1, an intermediate heat exchanger 2 and a heat exchange coil 3, wherein the heat exchange coil 3 is arranged in the fresh air handling unit 1. The fresh air inlet pipe 7 and the fresh air outlet pipe 8 are respectively connected to the two sides of the fresh air unit 1, and the heat exchange coil 3 is arranged between the fresh air inlet pipe 7 and the fresh air outlet pipe 8. The intermediate heat exchanger 2 is arranged on the fresh air unit 1, one side of the intermediate heat exchanger 2 is connected with the heat exchange coil 3 through an intermediate medium pipeline 6, and the other side of the intermediate heat exchanger 2 is respectively connected with a hot water supply pipe 9 and a hot water return pipe 10.
Outdoor fresh air flows into the fresh air unit 1 through the fresh air inlet pipe 7, and the outdoor fresh air is sent into the room through the fresh air outlet pipe 8. The intermediate medium pipeline 6 comprises a first intermediate medium pipeline 61 and a second intermediate medium pipeline 62, the first intermediate medium pipeline 61 is provided with a valve 5, and the second intermediate medium pipeline 62 is provided with the valve 5 and the circulating water pump 4. An intermediate heat exchange medium is arranged in the intermediate medium pipeline 6 and circularly flows back and forth between the intermediate heat exchanger 2 and the heat exchange coil 3 through the circulating water pump 4. Hot water flows into the intermediate heat exchanger 2 through the hot water supply pipe 9, and the hot water flows back to the heat source through the hot water return pipe 10. The fresh air handling unit 1 and the intermediate heat exchanger 2 are arranged in an integrated design and matching way, and can also be arranged separately, for example, the fresh air handling unit 1 can be directly arranged outdoors, and the service area of a machine room is saved.
Specifically, in this embodiment, the outdoor fresh air enters the fresh air unit 1 through the fresh air inlet pipe 7, and after exchanging heat with the heat exchange coil 3 in the fresh air unit 1, the temperature of the outdoor fresh air rises to the design temperature, and then is sent into an area or room with fresh air demand indoors through the fresh air outlet pipe 8.
Specifically, in this embodiment, the intermediate medium pipe 6 is filled with an intermediate heat exchange medium (such as an ethylene glycol solution) with a low freezing point, and different types of intermediate heat exchange media can be selected according to the outdoor air temperature characteristics. The intermediate heat exchange medium circularly flows between the intermediate heat exchanger 2 and the heat exchange coil 3 through the circulating water pump 4, heat in the intermediate heat exchanger 2 is transferred to the heat exchange coil 3, and then outdoor fresh air entering the fresh air unit 1 is heated through the heat exchange coil 3.
Specifically, in this embodiment, the intermediate heat exchanger 2 adopts an indirect heat exchange manner, and may take various forms such as a positive displacement heat exchanger or a plate heat exchanger, and the intermediate heat exchanger 2 may take a multi-heat source form. One side of the intermediate heat exchanger 2 is connected with a hot water supply pipe 9 and a hot water return pipe 10, and the other side of the intermediate heat exchanger 2 is connected with an intermediate medium pipeline 6. The hot water enters the intermediate heat exchanger 2 through the hot water supply pipe 9, exchanges heat with the intermediate heat exchange medium, and flows back to the heat source through the hot water return pipe 10.
Specifically, in this embodiment, when the fresh air handling unit 1 of the present utility model is not operating, the circulating water pump 4 stops operating and closes the valve 5, so as to reduce heat exchange of the intermediate heat exchange medium in the intermediate heat exchanger 2.
Specifically, in this embodiment, the fresh air handling unit 1 may be a heat recovery type fresh air handling unit, and the fresh air heat load and the energy consumption are reduced by recovering the energy in the exhaust air.
Specifically, in this embodiment, a cold water coil pipe can be additionally arranged in the novel medium fresh air handling unit 1, so as to provide a cold source for summer.
Specifically, in this embodiment, a frequency converter may be added to the circulating water pump 4 in the present utility model, and the running energy consumption is reduced by the frequency converter.
Specifically, in this embodiment, an electric heat-insulating sealing valve can be additionally arranged at the fresh air inlet pipe, and the valve is started and stopped in linkage with the fresh air handling unit 1.
Specifically, in this embodiment, the hot water heat source may be a renewable low-grade heat source, so as to improve the utilization rate of renewable energy and save the running cost.
Working principle:
according to the utility model, the intermediate heat exchanger is arranged in the fresh air unit, and the intermediate heat exchange medium for exchanging heat with outdoor low-temperature fresh air in the intermediate heat exchanger has a lower freezing point than that of the outdoor fresh air, and the medium exchanges heat with hot water in the intermediate heat exchanger through the circulating pump, so that the direct heat exchange between the hot water and the outdoor low-temperature fresh air is avoided, the risk of frost cracking of a heat exchange coil on the fresh air unit is reduced, and in addition, the heat source temperature of the fresh air unit is lower than that of a conventional air conditioner heat source, low-grade waste heat and low-grade renewable energy sources can be utilized as heat sources, the consumption of high-grade energy sources is reduced, and the running cost is reduced.
In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and are not to be construed as limiting the present application.
The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the utility model. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.
Claims (8)
1. The anti-freezing fresh air treatment unit is characterized by comprising a fresh air unit (1), an intermediate heat exchanger (2) and a heat exchange coil (3), wherein the heat exchange coil (3) is arranged in the fresh air unit (1);
the two sides of the fresh air unit (1) are respectively connected with a fresh air inlet pipe (7) and a fresh air outlet pipe (8), and the heat exchange coil (3) is arranged between the fresh air inlet pipe (7) and the fresh air outlet pipe (8);
the intermediate heat exchanger (2) is arranged on the fresh air handling unit (1), one side of the intermediate heat exchanger (2) is connected with the heat exchange coil (3) through an intermediate medium pipeline (6), and the other side of the intermediate heat exchanger (2) is respectively connected with a hot water supply pipe (9) and a hot water return pipe (10).
2. The antifreeze fresh air handling unit according to claim 1, wherein outdoor fresh air flows into the fresh air handling unit (1) through the fresh air inlet pipe (7), and the outdoor fresh air is fed into the room through the fresh air outlet pipe (8).
3. The antifreeze fresh air handling unit according to claim 1, wherein the intermediate medium pipeline (6) comprises an intermediate medium pipeline one (61) and an intermediate medium pipeline two (62), the valve (5) is arranged on the intermediate medium pipeline one (61), and the valve (5) and the circulating water pump (4) are arranged on the intermediate medium pipeline two (62).
4. An anti-freezing fresh air handling unit according to claim 3, wherein an intermediate heat exchange medium is arranged in the intermediate medium pipeline (6), and the intermediate heat exchange medium circularly flows back and forth between the intermediate heat exchanger (2) and the heat exchange coil (3) through the circulating water pump (4).
5. The antifreeze fresh air handling unit of claim 4, wherein the intermediate heat exchange medium comprises a glycol solution.
6. The antifreeze fresh air handling unit according to claim 1, wherein hot water flows into the intermediate heat exchanger (2) through the hot water supply pipe (9), and the hot water flows back to a heat source through the hot water return pipe (10).
7. The antifreeze fresh air handling unit according to claim 1, wherein the intermediate heat exchanger (2) comprises a plate heat exchanger or a positive displacement heat exchanger.
8. The antifreeze fresh air handling unit according to claim 1, wherein the fresh air handling unit (1) and the intermediate heat exchanger (2) are arranged in an integrated design fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322085541.6U CN220355626U (en) | 2023-08-03 | 2023-08-03 | Antifreezing fresh air handling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322085541.6U CN220355626U (en) | 2023-08-03 | 2023-08-03 | Antifreezing fresh air handling unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220355626U true CN220355626U (en) | 2024-01-16 |
Family
ID=89501031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322085541.6U Active CN220355626U (en) | 2023-08-03 | 2023-08-03 | Antifreezing fresh air handling unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220355626U (en) |
-
2023
- 2023-08-03 CN CN202322085541.6U patent/CN220355626U/en active Active
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