CN220135782U - Defrosting structure of air source heat pump unit - Google Patents
Defrosting structure of air source heat pump unit Download PDFInfo
- Publication number
- CN220135782U CN220135782U CN202321049069.4U CN202321049069U CN220135782U CN 220135782 U CN220135782 U CN 220135782U CN 202321049069 U CN202321049069 U CN 202321049069U CN 220135782 U CN220135782 U CN 220135782U
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- China
- Prior art keywords
- defrosting
- heat exchanger
- pipe
- aluminum fin
- pipeline
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- 238000010257 thawing Methods 0.000 title claims abstract description 61
- 238000004781 supercooling Methods 0.000 claims abstract description 31
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 23
- 229910052802 copper Inorganic materials 0.000 claims abstract description 23
- 239000010949 copper Substances 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 abstract description 14
- 239000003507 refrigerant Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
Landscapes
- Defrosting Systems (AREA)
Abstract
The utility model discloses a defrosting structure of an air source heat pump unit, which comprises a compressor, wherein one side of the compressor is provided with a copper pipe aluminum fin heat exchanger, one end of the copper pipe aluminum fin heat exchanger is connected with a defrosting main pipeline, and the other end of the copper pipe aluminum fin heat exchanger is connected with a supercooling pipe; a first three-way valve and a second three-way valve are respectively arranged on the defrosting main pipeline and the supercooling pipe; a liquid separation head is arranged on the supercooling pipe, and one end of the liquid separation head is provided with a hot gas bypass pipeline; the electromagnetic valve is arranged on the hot gas bypass pipe. According to the utility model, aiming at the bottom pipeline, the high-temperature exhaust gas is directly led into the bottom pipeline for defrosting through the bypass optimizing structure, so that the defrosting effect of the whole heat exchanger is improved, and the defrosting time is reduced. The electromagnetic valve in the bypass pipeline can achieve better flow distribution through the on-off of the electromagnetic valve, not only consider the defrosting effect of the lower-layer coil, but also ensure the defrosting effect of the upper-layer coil, so that the defrosting effect is more ideal.
Description
Technical Field
The utility model relates to the technical field of air source heat pump equipment, in particular to a defrosting structure of an air source heat pump unit.
Background
The air source heat pump unit is characterized in that when refrigerating in summer, an outdoor copper pipe aluminum fin heat exchanger is used as a condenser, high-temperature and high-pressure gas discharged by a compressor is condensed, and heat of a refrigerant is transferred into air; when heating in winter, the outdoor copper pipe aluminum fin heat exchanger is used as an evaporator, the throttled low-temperature low-pressure gas is evaporated, and the outdoor heat is absorbed from the air.
At present, in order to improve the heat exchange efficiency of the finned tubes, the arrangement of the coil pipes is increased by a supercooling section, so that the supercooling degree of the refrigerant is improved, and the refrigerating efficiency of the system is further improved.
In winter, the heat pump unit is easy to form a frost layer of the copper pipe aluminum fin heat exchanger, and the heat exchange effect is affected. At this time, the unit can enter defrosting control, and generally, refrigerant reverse defrosting is adopted, namely, high-temperature gas exhausted by a compressor is utilized for defrosting until the frost layer on the fin tube is melted. Due to gravity, defrosting water can drop on a pipeline at the lower layer, so that the defrosting condition of the pipeline at the lower layer is worse. If the copper pipe aluminum fin heat exchanger also adopts a supercooling pipe form at the moment, the temperature of the refrigerant entering the supercooling section is lower, so that the defrosting effect of the bottom is less ideal, and in the continuous defrosting process, once defrosting of the bottom is not thorough, the ice layer is thicker than the junction, so that the heat exchange capacity of the copper pipe aluminum fin heat exchanger is greatly affected. At present, general defrosting logic, namely, in order to ensure a certain defrosting effect, generally adopts to prolong defrosting time, but extra electric energy required by defrosting can be added, and the actual experience of a customer is influenced due to long-time stopping of heat supply.
Disclosure of Invention
The utility model mainly aims to provide a defrosting structure of an air source heat pump unit, which is used for solving the technical problems.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the defrosting structure of the air source heat pump unit comprises a compressor, wherein one side of the compressor is provided with a copper pipe aluminum fin heat exchanger, one end of the copper pipe aluminum fin heat exchanger is connected with a defrosting main pipeline, and the other end of the copper pipe aluminum fin heat exchanger is connected with a supercooling pipe; a first three-way valve and a second three-way valve are respectively arranged on the defrosting main pipeline and the supercooling pipe; a liquid separation head is arranged on the supercooling pipe, and a hot gas bypass pipeline is arranged at one end of the liquid separation head; and an electromagnetic valve is arranged on the hot gas bypass pipe.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: one end of the compressor is provided with a four-way reversing valve, one end of the four-way reversing valve is connected with the gas-liquid separator, and the other end of the four-way reversing valve is connected with the port of the end plate a.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: one end of the supercooling pipe is provided with a b end plate exchange port; and a throttling element is arranged between the supercooling pipe and the port of the end plate b.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: and a fan is arranged on one side of the copper pipe aluminum fin heat exchanger.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: the supercooling pipe is arranged at the lowest layer of the copper pipe aluminum fin heat exchanger.
The beneficial effects of the utility model are as follows:
in the prior art, in order to improve the defrosting effect, the prior proposal ensures that the defrosting is finished by prolonging the defrosting time, but in the actual defrosting process, the defrosting at the lower layer of the coil pipe is more difficult to finish, thereby leading to longer defrosting time; the utility model aims at the bottom pipeline, and directly introduces high-temperature exhaust gas into the bottom pipeline for defrosting through the bypass optimizing structure, thereby improving the defrosting effect of the whole heat exchanger and reducing defrosting time. The electromagnetic valve in the bypass pipeline can achieve better flow distribution through the on-off of the electromagnetic valve, not only consider the defrosting effect of the lower-layer coil, but also ensure the defrosting effect of the upper-layer coil, so that the defrosting effect is more ideal.
Drawings
FIG. 1 is a perspective view of the overall structure of the present utility model;
fig. 2 is a system diagram of a conventional heat pump unit.
FIG. 3 is a system diagram of the optimized heat pump unit of the present utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the drawings in the embodiments, however, the following detailed description and the embodiments are only for illustrative purposes and not limiting the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being 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 utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Referring to fig. 1 to 3 of the drawings, a defrosting structure of an air source heat pump unit in the present embodiment includes a compressor 1, wherein one side of the compressor 1 is provided with a copper pipe aluminum fin heat exchanger 3, one end of the copper pipe aluminum fin heat exchanger 3 is connected with a defrosting main pipeline 32, and the other end is connected with a supercooling pipeline 3; a first three-way valve 71 and a second three-way valve 72 are respectively arranged on the defrosting main pipeline 32 and the supercooling pipe 31; the supercooling pipe 31 is provided with a liquid separating head 33, and one end of the liquid separating head 33 is provided with a hot gas bypass pipeline; the hot gas bypass pipe is provided with an electromagnetic valve 7.
Further, one end of the compressor 1 is provided with a four-way reversing valve 4, one end of the four-way reversing valve 4 is connected with a gas-liquid separator 5, and the other end of the four-way reversing valve is connected with an end plate port.
Further, one end of the supercooling pipeline 3 is provided with a b end plate exchange port; a throttling element 2 is arranged between the supercooling pipe 31 and the port of the b end plate.
Further, a fan 6 is arranged on one side of the copper pipe aluminum fin heat exchanger 3.
During normal heating in winter, the compressor 1 discharges high-temperature and high-pressure gas, the gas enters an a-end plate port-changing port through the four-way reversing valve 4, and returns from a b-end plate port-changing port after condensation, and the gas is low-temperature and high-pressure gas at the moment; throttling the liquid into low-temperature and low-pressure liquid through a throttling element 2, then entering a copper pipe aluminum fin heat exchanger, and simultaneously blowing cold air into a fan 6 to exchange heat with a refrigerant; the refrigerant firstly enters the supercooling pipeline 31, then enters the defrosting main pipeline 32 through the liquid separation head 33, then becomes high-temperature low-pressure gas, passes through the four-way reversing valve 4 again, passes through the gas-liquid separator 5, and then returns to the compressor 1. At this time, the air blown by the fan 6 is low in pipeline temperature, so that water in the air can be separated out, and if the evaporation temperature is lower than 0 ℃, frosting can occur on the copper pipe aluminum fin heat exchanger 3.
In the defrosting process, the four-way reversing valve 4 is switched, as shown in fig. 2, high-temperature gas can enter the supercooling pipe 31 after passing through the defrosting main pipeline 32, and at the moment, the defrosting of the defrosting main pipeline 32 is often carried out, and because the supercooling pipe 31 is generally arranged at the lowest layer of the heat exchanger, cold water drops on the supercooling pipe 31 due to the action of gravity, and meanwhile, the temperature of the refrigerant is reduced more, so that the defrosting effect of the supercooling pipe 31 is poor.
As shown in fig. 2, a hot gas bypass pipeline is added, part of high-temperature gas can enter the bypass pipeline through the first three-way valve 71 of the defrosting main pipeline 32 by opening the bypass electromagnetic valve 7, and finally, the high-temperature gas is directly led into the supercooling pipe 31 for defrosting through the second three-way valve 72 of the supercooling pipe 31, so that the gas is prevented from being cooled in the defrosting main pipeline 32, and heat is transferred into the environment, and the defrosting effect can be greatly improved by the operation.
In the drawings, arrows Heating and Defrosting indicate the flow direction of the gas during the heat exchange process.
The above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model in this way, therefore: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (5)
1. The defrosting structure of the air source heat pump unit is characterized by comprising a compressor (1), wherein one side of the compressor (1) is provided with a copper pipe aluminum fin heat exchanger (3), one end of the copper pipe aluminum fin heat exchanger (3) is connected with a defrosting main pipeline (32), and the other end of the copper pipe aluminum fin heat exchanger is connected with a supercooling pipe (31); a first three-way valve (71) and a second three-way valve (72) are respectively arranged on the defrosting main pipeline (32) and the supercooling pipe (31); a liquid separation head (33) is arranged on the supercooling pipe (31), and a hot gas bypass pipeline is arranged at one end of the liquid separation head (33); an electromagnetic valve (7) is arranged on the hot gas bypass pipe.
2. The defrosting structure of the air source heat pump unit according to claim 1, wherein one end of the compressor (1) is provided with a four-way reversing valve (4), one end of the four-way reversing valve (4) is connected with the gas-liquid separator (5), and the other end of the four-way reversing valve is connected with an end plate port.
3. The defrosting structure of an air source heat pump unit according to claim 1, wherein one end of the supercooling pipe (31) is provided with a b-end plate exchange port; a throttling element (2) is arranged between the supercooling pipe (31) and the port of the end plate b.
4. The defrosting structure of the air source heat pump unit according to claim 1 is characterized in that a fan (6) is arranged on one side of the copper pipe aluminum fin heat exchanger (3).
5. The defrosting structure of an air source heat pump unit according to claim 1, wherein the supercooling pipe (31) is arranged at the lowest layer of the copper pipe aluminum fin heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321049069.4U CN220135782U (en) | 2023-04-28 | 2023-04-28 | Defrosting structure of air source heat pump unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321049069.4U CN220135782U (en) | 2023-04-28 | 2023-04-28 | Defrosting structure of air source heat pump unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220135782U true CN220135782U (en) | 2023-12-05 |
Family
ID=88962469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321049069.4U Active CN220135782U (en) | 2023-04-28 | 2023-04-28 | Defrosting structure of air source heat pump unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220135782U (en) |
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2023
- 2023-04-28 CN CN202321049069.4U patent/CN220135782U/en active Active
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