CN110608474A - Pre-dehumidification structure of outdoor heat exchanger, heat pump system and cold and hot water unit - Google Patents
Pre-dehumidification structure of outdoor heat exchanger, heat pump system and cold and hot water unit Download PDFInfo
- Publication number
- CN110608474A CN110608474A CN201910979402.3A CN201910979402A CN110608474A CN 110608474 A CN110608474 A CN 110608474A CN 201910979402 A CN201910979402 A CN 201910979402A CN 110608474 A CN110608474 A CN 110608474A
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- CN
- China
- Prior art keywords
- heat exchanger
- outdoor heat
- dehumidifying
- dehumidification
- air inlet
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Classifications
-
- 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
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/006—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass for preventing frost
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Combustion & Propulsion (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a pre-dehumidification structure of an outdoor heat exchanger, a heat pump system and a cold and hot water unit, which comprise: the dehumidifying device is arranged on the air inlet channel of the outdoor heat exchanger and is used for pre-dehumidifying air. According to the invention, the air inlet channel of the outdoor heat exchanger is provided with the dehumidifying device for pre-dehumidifying the air to be passed through the outdoor heat exchanger, so that the water vapor content in the air passed through the outdoor heat exchanger is reduced, thereby avoiding the performance influence caused by frosting of the outdoor heat exchanger during heat exchange, and avoiding the attenuation of heating effect caused by the defrosting mode of unit shutdown operation.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to a pre-dehumidification structure of an outdoor heat exchanger, a heat pump system and a cold and hot water unit.
Background
For the air-cooled cold and hot water unit, the performance of the unit can be affected by frosting of the outer unit in winter, and the frost is not dissolved in time, so that the frost is accumulated more and more thickly, and the reliability of the unit can be affected. At present, most of defrosting methods for products are to defrost by switching a refrigeration and heating mode of an outdoor unit, a unit is required to stop to enter a defrosting mode, and meanwhile, a heating effect is attenuated.
Disclosure of Invention
The invention provides a pre-dehumidification structure of an outdoor heat exchanger, a heat pump system and a cold and hot water unit, aiming at solving the technical problem that the unit needs to be shut down and enter a defrosting mode and the heating effect is attenuated in the prior art.
The technical scheme adopted by the invention is as follows:
the invention provides a pre-dehumidification structure of an outdoor heat exchanger, which comprises: the dehumidifying device is arranged on the air inlet channel of the outdoor heat exchanger and is used for pre-dehumidifying air.
The dehumidifying apparatus includes: the dehumidification membrane of casing, setting in the casing, the one end of casing is equipped with the humid air import, and the other end is equipped with the dry air export that is located the air inlet runner.
An air flow channel communicated with a wet air inlet and a dry air outlet is arranged in the dehumidifying membrane, a gap is arranged between the dehumidifying membrane and the inner wall of the shell to form a blowing air flow channel, and a blowing air inlet and a blowing air outlet communicated with the blowing air flow channel are arranged on the side surface of the shell.
Preferably, the dehumidification membrane is tubular, and one end of the dehumidification membrane is communicated with the wet air inlet and the other end of the dehumidification membrane is communicated with the dry air outlet.
Furthermore, the wet air inlet is connected with a wet air input pipeline, and a first gas compression device is arranged on the wet air input pipeline.
Furthermore, the purge gas outlet is connected with a wet air input pipeline through a recovery pipeline, and a second gas compression device is arranged on the recovery pipeline.
Preferably, the dry air outlet is provided with a branch pipe connected to the purge air inlet.
The second gas compression apparatus includes: a second compressor and a gas-liquid separator.
Preferably, the dehumidifying membrane is made of a polymer membrane or a hollow fiber membrane.
The invention also provides a heat pump system using the pre-dehumidification structure.
The invention also provides a cold and hot water unit using the heat pump system.
Compared with the prior art, the air inlet channel of the outdoor heat exchanger is provided with the dehumidifying device for pre-dehumidifying the air which is going to flow through the outdoor heat exchanger, so that the water vapor content in the air which flows through the outdoor heat exchanger is reduced, and the performance of the outdoor heat exchanger is prevented from being influenced by frosting during heat exchange.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of the present invention;
fig. 2 is a schematic diagram of the dehumidifying apparatus of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below 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 principles and construction of the present invention will be described in detail below with reference to the drawings and examples.
As shown in fig. 1, the invention provides a pre-dehumidification structure of an outdoor heat exchanger, wherein an outdoor heat exchanger 1 is a fin heat exchanger, and a fan drives air to flow to perform contact type heat exchange, wherein a dehumidification device 2 for pre-dehumidifying air is arranged on an air inlet channel of the outdoor heat exchanger 1, so that the content of water vapor in the air flowing through the outdoor heat exchanger 1 is reduced, thereby preventing the outdoor heat exchanger 1 from frosting during heat exchange to influence performance, and avoiding the heating effect from being attenuated due to a defrosting mode of unit shutdown operation.
As shown in fig. 2, in the present invention, the dehumidifying apparatus 2 specifically includes: the dehumidifying device comprises a shell 21 and a dehumidifying membrane 22, wherein a cavity for installing the dehumidifying membrane 22 is arranged in the shell 21, one end of the shell 21 is provided with a humid air inlet 211, the other end of the shell 21 is provided with a dry air outlet 212 positioned on an air inlet channel of the outdoor heat exchanger, and an air channel for communicating the humid air inlet 211 with the dry air outlet 212 is arranged in the dehumidifying membrane 22, so that air entering the air channel is permeated through the dehumidifying membrane to reduce the content of water vapor to be dry air.
In a specific embodiment, the casing 21 is tubular, the dehumidifying membrane 22 is also tubular corresponding to the casing 21, one end of the dehumidifying membrane 22 is connected to the wet air inlet 211, and the other end is connected to the dry air outlet 212, a gap is formed between the dehumidifying membrane 22 and the inner wall of the casing 21 to form a scavenging air flow passage, and the side surface of the casing is provided with a scavenging air inlet and a scavenging air outlet. The purge gas outlet 214 is connected to a recovery pipeline, a second gas compression device is arranged on the recovery pipeline, the second gas compression device is specifically a second compressor 41 and a gas-liquid separator 42, and the second compressor extracts the humid air from the purge gas outlet 214 to enable the inner wall of the air flow channel of the dehumidification membrane and the outer wall of the purge gas flow channel to continuously maintain a pressure difference. The wet air inlet 211 is connected with a wet air input pipeline, and the wet air input pipeline is provided with a first gas compression device, specifically a first compressor 3, and simultaneously, a gas-liquid separator can be arranged, so that the wet air can be continuously extracted and input into the wet air inlet 211 to provide compressed gas. Meanwhile, the recovery pipeline is connected with the wet air input pipeline to form a gas loop, so that a continuous and uninterrupted drying process is formed.
In another embodiment, a branch pipe connected to the purge gas inlet 211 may be provided at the dry air outlet 212, and the water vapor is purged through the dry gas at the dry air outlet 212.
The specific material of dehumidification membrane can be polymer film or hollow fiber membrane, and the specific dehumidification principle does: when air passes through the air channel, the outer wall of the dehumidifying membrane and the inner wall of the passing air form pressure difference, and the permeation rate of water vapor in the air channel is higher, and the permeation coefficient of the water vapor is at least two orders of magnitude higher than that of nitrogen, oxygen or other trace gases in the air, so that the water vapor automatically permeates to the outer wall of the dehumidifying membrane and is separated from the gases.
Because of the very easy gathering of vapor or even condensation in dehumidification membrane's outer wall (infiltration side), cause both sides vapor pressure differential to reduce, the transmissivity descends, the accessible sets up the lateral pipe of connecting the purge gas import at dry air outlet, through the dry purge gas of the small part through the purge gas runner with the vapor of gathering at the outer wall of dehumidification membrane outside the purge gas export is taken out to the casing, or connect the recovery pipeline at the purge gas export and bleed through the compressor, make the inside and outside vapor partial pressure differential that exists of dehumidification membrane all the time, guarantee that water molecules constantly outwards diffuse, form a continuous incessant drying process.
The invention also provides a heat pump system using the pre-dehumidification structure.
The invention also provides a cold and hot water unit, which uses the heat pump system and is specifically an air-cooled cold and hot water unit.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (12)
1. A pre-dehumidification structure of an outdoor heat exchanger, comprising: and the dehumidifying device (2) is arranged on an air inlet channel of the outdoor heat exchanger (1) and is used for pre-dehumidifying air.
2. The pre-dehumidifying structure of an outdoor heat exchanger according to claim 1, wherein the dehumidifying apparatus comprises: the dehumidification device comprises a shell (21) and a dehumidification film (22) arranged in the shell, wherein one end of the shell (21) is provided with a wet air inlet (211), and the other end of the shell is provided with a dry air outlet (212) positioned on an air inlet flow channel.
3. The pre-dehumidifying structure of an outdoor heat exchanger according to claim 2, wherein an air flow passage communicating a humid air inlet (211) and a dry air outlet (212) is provided in the dehumidifying membrane (22).
4. The pre-dehumidifying structure of an outdoor heat exchanger according to claim 2 wherein a gap is provided between the dehumidifying membrane (22) and the inner wall of the casing (21) to form a purge gas flow path, and a purge gas inlet (213) and a purge gas outlet (214) communicating with the purge gas flow path are provided on the side surface of the casing.
5. The pre-dehumidifying structure of an outdoor heat exchanger according to claim 2, wherein the dehumidifying membrane (22) has a tubular shape having one end communicating with the humid air inlet (211) and the other end communicating with the dry air outlet (212).
6. The pre-dehumidification structure of an outdoor heat exchanger according to claim 4, wherein the humid air inlet (211) is connected to a humid air input duct, and the first gas compression device is provided on the humid air input duct.
7. The pre-dehumidification structure of an outdoor heat exchanger according to claim 6, wherein the purge gas outlet (214) is connected to the humid air input pipe through a recovery pipe on which the second gas compression device is provided.
8. The pre-dehumidifying structure of an outdoor heat exchanger according to claim 4, wherein the dry air outlet is provided with a branch pipe connected to the purge air inlet.
9. The pre-dehumidification structure of an outdoor heat exchanger as set forth in claim 7, wherein said second gas compression device comprises: a second compressor (41) and a gas-liquid separator (42).
10. The pre-dehumidification structure of an outdoor heat exchanger according to claim 2, wherein the material of the dehumidification membrane is a polymer membrane or a hollow fiber membrane.
11. A heat pump system characterized by using the pre-dehumidification structure according to any one of claims 1 to 10.
12. A hot and cold water unit, characterized in that the heat pump system of claim 11 is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910979402.3A CN110608474A (en) | 2019-10-15 | 2019-10-15 | Pre-dehumidification structure of outdoor heat exchanger, heat pump system and cold and hot water unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910979402.3A CN110608474A (en) | 2019-10-15 | 2019-10-15 | Pre-dehumidification structure of outdoor heat exchanger, heat pump system and cold and hot water unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110608474A true CN110608474A (en) | 2019-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910979402.3A Pending CN110608474A (en) | 2019-10-15 | 2019-10-15 | Pre-dehumidification structure of outdoor heat exchanger, heat pump system and cold and hot water unit |
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| CN (1) | CN110608474A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279045A (en) * | 2021-12-08 | 2022-04-05 | 珠海格力电器股份有限公司 | Air conditioner defrosting control method and device and air conditioner |
-
2019
- 2019-10-15 CN CN201910979402.3A patent/CN110608474A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279045A (en) * | 2021-12-08 | 2022-04-05 | 珠海格力电器股份有限公司 | Air conditioner defrosting control method and device and air conditioner |
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