CN116379684A - Novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting - Google Patents
Novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting Download PDFInfo
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- CN116379684A CN116379684A CN202310277858.1A CN202310277858A CN116379684A CN 116379684 A CN116379684 A CN 116379684A CN 202310277858 A CN202310277858 A CN 202310277858A CN 116379684 A CN116379684 A CN 116379684A
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- 238000010257 thawing Methods 0.000 title claims abstract description 243
- 239000007788 liquid Substances 0.000 claims abstract description 175
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000003507 refrigerant Substances 0.000 claims abstract description 28
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052802 copper Inorganic materials 0.000 claims abstract description 20
- 239000010949 copper Substances 0.000 claims abstract description 20
- 238000005057 refrigeration Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 5
- 230000009977 dual effect Effects 0.000 claims 1
- 238000001816 cooling Methods 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D13/00—Stationary devices, e.g. cold-rooms
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/12—Removing frost by hot-fluid circulating system separate from the refrigerant system
- F25D21/125—Removing frost by hot-fluid circulating system separate from the refrigerant system the hot fluid being ambient air
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/14—Collecting or removing condensed and defrost water; Drip trays
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides a novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting, which comprises an air return branch coil pipe, an air return header pipe, a barrel pump air return outlet and defrosting liquid discharge outlet, a direct expansion liquid distribution head branch pipe, a liquid supply header pipe, a liquid supply branch coil pipe, a copper one-way valve, a defrosting hot air pipe, a direct expansion liquid supply liquid distribution head, a direct expansion liquid inlet, a barrel pump liquid supply port, a defrosting hot air inlet, a hot air defrosting branch coil pipe, a defrosting hot air header pipe, a defrosting water discharge outlet, a water receiving disc, an axial flow fan and the like. The direct expansion liquid supply interface and the direct expansion air return interface are separated from the barrel pump liquid supply interface and the barrel pump air return interface, and the direct expansion and the barrel pump share the liquid supply header, the air return header and the stop valve, so that the fan can be used for both a direct expansion liquid supply system and a barrel pump liquid supply system, and a copper one-way valve is additionally arranged in front of a hot air pipe liquid supply header or an air return header for preventing a water tray from being frozen by refrigerant liquid when an air cooler cools.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting.
Background
In the multi-layer multi-temperature-zone refrigeration system, the bottom layer refrigeration house is usually designed into a variable-temperature refrigeration house with a few refrigeration rooms, and more than two layers of refrigeration houses or refrigeration houses are designed, and the machine room is arranged at the bottom layer or is an independent machine room. Because the top layer freezer air-cooler is big from the computer lab difference in height, when conventional direct expansion supplies liquid, gravity supplies liquid can't satisfy the refrigeration requirement, refrigeration engineer personnel can consider to adopt the barreled pump mode of supplying liquid. When the temperature changing warehouse is used as a refrigerator, the barrel pump liquid supply can be utilized, and the temperature changing warehouse and the refrigerator on the top layer are combined into a set of barrel pump refrigerating system, but when the temperature changing warehouse is used as a refrigerator, the barrel pump liquid supply is not needed because the height difference of the air cooler is small, and the direct expansion liquid supply mode can be considered to be adopted, so that the investment of the barrel pump unit of the refrigerator can be reduced, and the filling amount of fluorine refrigerant can be reduced. Because barrel pump supplies liquid and directly expands supply liquid cooling fan inner structure inconsistent, bottom alternating temperature storehouse air-cooler uses the system air-cooler of directly expanding under the freezing operating mode if use barrel pump system air-cooler under the freezing operating mode, and same freezer barrel pump supplies liquid cooling fan and directly expands supply liquid cooling fan separately to set up promptly, can undoubtedly increase air-cooler quantity, increase the investment.
In the current refrigeration field, the defrosting modes of the air cooler comprise hot air defrosting, electric defrosting, water defrosting and natural defrosting, and the electric defrosting is directly heated due to the use of electric energy, so that a large amount of electric energy is consumed for each defrosting, and the energy conservation and the utilization of equipment are not facilitated; the water defrosting can have the problem that defrosting water freezes and defrosting is not thorough in the defrosting in a low-temperature refrigeration house due to the higher freezing point of water. Natural defrosting can only be used for working conditions that the temperature of a refrigeration house is higher than 5 ℃, and is not suitable for a refrigeration house and a refrigeration house with the temperature of 0-4 ℃. Hot gas defrosting is a main stream defrosting mode of a large-scale refrigeration house at present, part of exhaust gas of a compressor unit is directly utilized to flow to an air cooler, condensation heat of a refrigerant is utilized as a defrosting heat source, a good energy-saving effect is achieved, and meanwhile refrigerating oil remained on the inner wall of a coil can be brought out, so that heat exchange efficiency of the air cooler is improved. In the past, hot air defrosting is a relatively single liquid supply mode, but a barrel pump liquid supply system and a direct expansion liquid supply system dual-purpose air cooler adopts hot air defrosting, so that the structure of the air cooler needs to be redesigned.
Disclosure of Invention
According to the technical problem, a novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting is provided. The air cooler is designed into five interfaces: a direct expansion liquid supply inlet, a direct expansion return air outlet, a barrel pump liquid supply inlet, a barrel pump return air outlet and a defrosting hot air inlet. The liquid supply header and the air return header in the air cooler are designed to be vertically arranged, defrosting hot air firstly enters the water receiving disc to defrost, then a hot air pipe coming out of the water receiving disc is divided into two paths, and each path is provided with a stop valve and a copper one-way valve so as to be respectively suitable for liquid hot air defrosting of the barrel pump and direct expansion liquid hot air defrosting.
The invention adopts the following technical means:
novel be applicable to dual-purpose air-cooler structure of direct expansion and barreled pump of steam defrosting, include: the axial flow fan is arranged on the water receiving disc and is positioned at one side of the direct expansion and barrel pump dual-purpose structure;
the direct expansion and barrel pump dual-purpose structure comprises an air return branch coil pipe, an air return header pipe, a barrel pump air return outlet, a direct expansion liquid supply liquid separating head, a first defrosting hot air pipe, a direct expansion liquid inlet, a barrel pump liquid inlet, a defrosting hot air inlet, a direct expansion air return outlet, a first hot air defrosting branch coil pipe, a first defrosting hot air header pipe, a direct expansion liquid separating head branch pipe, a liquid supply header pipe, a liquid supply branch coil pipe, a second defrosting hot air pipe, a third defrosting hot air pipe, a fourth defrosting hot air pipe, a fifth defrosting hot air pipe, a first stop valve, a second stop valve, a sixth defrosting hot air pipe, a seventh defrosting hot air pipe, a second hot air defrosting branch coil pipe and a second defrosting hot air header pipe;
the direct expansion liquid supply inlet is connected with a direct expansion liquid supply liquid distribution head, the direct expansion liquid supply liquid distribution head is connected with a plurality of liquid supply branch coil pipes through a plurality of direct expansion liquid distribution head branch pipes, a plurality of liquid supply branch coil pipes are connected with a plurality of air return branch coil pipes, a plurality of air return branch coil pipes are connected to an air return header pipe, the air return header pipe is connected with two outlets which are respectively a barrel pump air return outlet and a direct expansion air return outlet, the barrel pump air return outlet is an upper outlet of an air cooler, and the direct expansion air return outlet is a lower outlet of the air cooler;
the liquid supply inlet of the barrel pump is connected with the lower part of the liquid supply header, and the liquid supply header is connected with each liquid supply branch coil;
the defrosting hot gas inlet is connected with a first defrosting hot gas header, and the first defrosting hot gas header is connected with a second defrosting hot gas header through a first hot gas defrosting branch coil pipe and a second hot gas defrosting branch coil pipe;
the second defrosting hot gas header is connected with two branches, including a first branch and a second branch;
the sixth defrosting hot air pipe, the first stop valve, the fourth defrosting hot air pipe, the third defrosting hot air pipe and the first defrosting hot air pipe are sequentially connected in sequence to form the first branch, and the first defrosting hot air pipe is connected with the return air header;
the seventh defrosting hot air pipe, the second stop valve, the fifth defrosting hot air pipe and the second defrosting hot air pipe are sequentially connected in sequence to form a second branch, and the second defrosting hot air pipe is connected with a liquid supply header;
the sixth defrosting hot air pipe and the seventh defrosting hot air pipe are connected in parallel to a second defrosting hot air header.
Further, when the device is applied to direct expansion liquid supply, the refrigerant flows to a direct expansion liquid separation head, a direct expansion liquid separation head branch pipe, a liquid supply branch pipe coil, a return air branch pipe coil and a return air header in sequence through a direct expansion liquid inlet, and finally flows out from a direct expansion return air outlet; the process of changing the refrigerant from liquid to gaseous is mainly focused on the process of flowing the refrigerant from the liquid supply branch coil to the return air branch coil.
Further, when the device is applied to liquid supply of the barrel pump, the refrigerant flows to the liquid supply header, the liquid supply branch coil pipe, the air return branch coil pipe and the air return header in sequence through the liquid inlet of the barrel pump, and finally flows out from the air return outlet of the barrel pump; the process of changing the refrigerant from liquid to gaseous is mainly focused on the process of flowing the refrigerant from the liquid supply branch coil to the return air branch coil.
Further, a first copper one-way valve is arranged between the second defrosting hot air pipe and the fifth defrosting hot air pipe; a second copper one-way valve is arranged between the third defrosting hot air pipe and the fourth defrosting hot air pipe.
Further, when the hot air defrosting device is applied to hot air defrosting of the barrel pump, refrigerant hot air flows to a first defrosting hot air header, a first hot air defrosting branch coil, a second defrosting hot air header, a sixth defrosting hot air pipe, a first stop valve, a fourth defrosting hot air pipe, a second copper one-way valve, a third defrosting hot air pipe, a first defrosting hot air pipe, an air return header, an air return branch coil, a liquid supply branch coil and a liquid supply header in sequence through a defrosting hot air inlet, and finally flows out from a liquid supply inlet of the barrel pump; the hot gas defrosting phase occurs primarily during the flow from the first hot gas defrosting bypass coil to the second hot gas defrosting header and from the return air bypass coil to the supply bypass coil.
Further, when the direct expansion hot gas defrosting device is applied to direct expansion hot gas defrosting, refrigerant hot gas flows to a first defrosting hot gas header, a first hot gas defrosting branch coil pipe, a second defrosting hot gas header, a seventh defrosting hot gas pipe, a second stop valve, a fifth defrosting hot gas pipe, a first copper one-way valve, a second defrosting hot gas pipe, a liquid supply header, a liquid supply branch coil pipe, a return air branch coil pipe and a return air header in sequence through defrosting hot gas inlets, and finally flows out from a direct expansion return air outlet; the hot gas defrosting phase occurs primarily during the flow from the first hot gas defrosting bypass coil to the second hot gas defrosting header and from the liquid supply bypass coil to the return air bypass coil.
Further, the direct expansion liquid supply and the barrel pump liquid supply are not used simultaneously, and the external connection pipe of the air cooler structure is switched.
Further, when direct expansion hot gas defrosting is carried out, the second stop valve is closed; and when hot gas defrosting of the barrel pump is carried out, the first stop valve is closed.
Further, when the hot air defrosting is carried out by the air cooler structure, refrigeration cannot be carried out, the liquid inlet of the barrel pump and the liquid inlet of the direct expansion are closed, and the axial flow fan stops running.
Further, the air cooler structure also comprises a defrosting water outlet connected with the water receiving disc; when the air cooler structure is used for hot air defrosting, the defrosting of the water receiving disc is firstly completely melted, so that defrosting water is normally discharged through the defrosting water outlet, and then the air cooler structure at the upper part of the water receiving disc is defrosted.
Compared with the prior art, the invention has the following advantages:
1. the novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting provided by the invention can realize two liquid supply modes of direct expansion liquid supply and barrel pump liquid supply by one air cooler, and is particularly suitable for working conditions of a variable-temperature warehouse.
2. The novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting can realize hot gas defrosting, reduce defrosting energy consumption and improve heat exchange efficiency of the air cooler.
3. The novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting can realize automatic switching when the stop valve is replaced by the electromagnetic valve.
For the reasons, the invention can be widely popularized in the fields of refrigeration and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention.
In the figure: 1. an air return branch coil pipe; 2. a return air header; 3. a barrel pump return air outlet; 4. a direct expansion liquid supply and separation head; 5. a first defrost hot gas pipe; 6. a direct expansion liquid inlet; 7. a liquid inlet of the barrel pump; 8. a defrosting hot gas inlet; 9. a direct expansion return air outlet; 10. a first hot gas defrosting bypass coil; 11. a first defrost hot gas header; 12. a defrosting drainage outlet; 13. a straight expansion liquid separating head branch pipe; 14. a liquid supply header; 15. a liquid supply branch coil; 16. a second defrosting hot air pipe; 17. a third defrosting hot air pipe; 18. a first copper check valve; 19. a second copper check valve; 20. an axial flow fan; 21. a fourth defrosting hot air pipe; 22. fifth defrosting hot air pipe; 23. a first stop valve; 24. a second shut-off valve; 25. a sixth defrosting hot air pipe; 26. seventh defrosting hot air pipe; 27. a second hot gas defrosting bypass coil; 28. a second defrost hot gas header; 29. and (5) a water receiving tray.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
As shown in FIG. 1, the invention provides a novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting, which comprises the following components:
the hot air return branch pipe coil 1, the hot air return pipe 2, the barrel pump return air outlet 3 (a defrosting liquid outlet), the direct expansion liquid supply liquid separating head 4, the first defrosting hot air pipe 5, the direct expansion liquid inlet 6, the barrel pump liquid inlet 7, the defrosting hot air inlet 8, the direct expansion return air outlet 9, the first hot air defrosting branch pipe coil 10, the first defrosting hot air pipe 11, the defrosting water draining outlet 12, the direct expansion liquid separating head branch pipe 13, the liquid supply pipe 14, the liquid supply branch pipe coil 15, the second defrosting hot air pipe 16, the third defrosting hot air pipe 17, the first copper one-way valve 18, the second copper one-way valve 19, the axial flow fan 20, the fourth defrosting hot air pipe 21, the fifth defrosting hot air pipe 22, the first stop valve 23, the second stop valve 24, the sixth defrosting hot air pipe 25, the seventh defrosting hot air pipe 26, the second hot air pipe branch pipe 27, the second defrosting hot air pipe 28 and the water receiving tray 29.
The direct expansion liquid supply inlet 6 is connected with the direct expansion liquid supply liquid distribution head 4, the direct expansion liquid supply liquid distribution head 4 is connected with the liquid supply branch coil 15 through the direct expansion liquid distribution head branch pipe 13, the liquid supply branch coil 15 is connected with the air return branch coil 1, the air return branch coil 1 is connected to the air return header 2, the air return header 2 is connected with two outlets, the upper outlet of the air cooler is a barrel pump air return outlet 3, and the lower outlet is a direct expansion air return outlet 9. The drum pump supply inlet 7 is connected to a lower position of the supply header 14. The supply header 14 is connected to each supply leg coil 15. The hot defrosting gas inlet 8 is connected to a hot defrosting gas header 11, the hot defrosting gas header 11 is connected to a hot defrosting gas header 28 through a hot defrosting branch pipe coil 10 and a hot defrosting branch pipe coil 27, and the hot defrosting gas header 28 is connected into two branches, wherein the connection direction of one branch is as follows: the sixth defrosting heat pipe 25, the first stop valve 23, the fourth defrosting heat pipe 21, the second copper one-way valve 19, the third defrosting heat pipe 17 and the first defrosting heat pipe 5 are finally connected to the return air header 2; the other branch connection direction is: the seventh defrost hot gas line 26, the second shut-off valve 24, the fifth defrost hot gas line 22, the first copper check valve 18, the second defrost hot gas line 16, and finally connect to the supply header 14.
Direct expansion liquid supply application: the refrigerant flows to the direct expansion liquid separating head 4, the direct expansion liquid separating head branch pipe 13, the liquid supply branch pipe coil 15, the return air branch pipe coil 1 and the return air header 2 in sequence through the direct expansion liquid inlet 6, and finally flows out from the direct expansion return air outlet 9. The process of changing the refrigerant from liquid to gaseous is mainly focused on the flow of refrigerant from the liquid supply leg coil 15 to the return leg coil 1.
Barrel pump liquid supply application: the refrigerant flows to the liquid supply header 14, the liquid supply branch coil 15, the return air branch coil 1 and the return air header 2 in sequence through the liquid inlet 7 of the barrel pump, and finally flows out from the return air outlet 3 of the barrel pump. The process of changing the refrigerant from liquid to gaseous is mainly focused on the flow of refrigerant from the liquid supply leg coil 15 to the return leg coil 1.
Barrel pump hot gas defrosting application: the refrigerant hot gas flows to the first defrosting hot gas header 11, the first hot gas defrosting branch coil 10, the second hot gas defrosting branch coil 27, the second defrosting hot gas header 28, the sixth defrosting hot gas pipe 25, the first stop valve 23, the fourth defrosting hot gas pipe 21, the second copper one-way valve 19, the third defrosting hot gas pipe 17, the first defrosting hot gas pipe 5, the air return header 2, the air return branch coil 1, the liquid supply branch coil 15 and the liquid supply header 14 in sequence through the defrosting hot gas inlet 8, and finally comes out from the barrel pump liquid supply inlet 7. The hot gas defrost phase occurs primarily in the first hot gas defrost bypass coil 10 through the second defrost hot gas header 28 and in the return bypass coil 1 through the supply bypass coil 15.
Direct expansion hot air defrosting application: the refrigerant hot gas flows to the first defrosting hot gas header 11, the first hot gas defrosting branch coil 10, the second hot gas defrosting branch coil 27, the second defrosting hot gas header 28, the seventh defrosting hot gas pipe 26, the second stop valve 24, the fifth defrosting hot gas pipe 22, the first copper one-way valve 18, the second defrosting hot gas pipe 16, the liquid supply header 14, the liquid supply branch coil 15, the return air branch coil 1 and the return air header 2 in sequence through the defrosting hot gas inlet 8, and finally flows out from the direct expansion return air outlet 9. The hot gas defrost phase occurs primarily in the first hot gas defrost bypass coil 10 through the second defrost hot gas header 28 and in the liquid supply bypass coil 15 through the return bypass coil 1.
The direct expansion liquid supply interface and the direct expansion air return interface are separated from the barrel pump liquid supply interface and the barrel pump air return interface, and the direct expansion and the barrel pump share the liquid supply header, the air return header and the stop valve, so that the fan can be used for both a direct expansion liquid supply system and a barrel pump liquid supply system, and a copper one-way valve is additionally arranged in front of a hot air pipe liquid supply header or an air return header for preventing a water tray from being frozen by refrigerant liquid when an air cooler cools.
In this embodiment, the direct expansion liquid supply and the barrel pump liquid supply are not used at the same time, but are switched by the external connection pipe of the air cooler.
In this embodiment, when hot air defrosting, the second stop valve 24 needs to be closed for hot air defrosting of direct expansion liquid supply; hot gas defrosting of the drum pump supply requires closing the first shut-off valve 23.
In this embodiment, when hot air in the air cooler is defrosted, the air cooler cannot cool, the barrel pump liquid inlet 7 and the direct expansion liquid inlet 6 need to be closed, and the axial flow fan 20 stops running.
In this embodiment, when hot air of the air cooler is defrosted, the defrosting of the water receiving tray 29 is firstly completely melted, so that defrosting water can be normally discharged through the defrosting water outlet 12, and then the air cooler at the upper part of the water receiving tray 29 is defrosted.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will 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 invention.
Claims (10)
1. Novel be applicable to direct expansion and dual-purpose air-cooler structure of barreled pump of steam defrosting, its characterized in that includes: the axial flow fan (20), the water pan (29) and the direct expansion and barrel pump dual-purpose structure arranged above the water pan (29), wherein the axial flow fan (20) is arranged on the water pan (29) and is positioned at one side of the direct expansion and barrel pump dual-purpose structure;
the direct expansion and barrel pump dual-purpose structure comprises an air return branch coil pipe (1), an air return header (2), a barrel pump air return outlet (3), a direct expansion liquid supply liquid distribution head (4), a first defrosting hot air pipe (5), a direct expansion liquid inlet (6), a barrel pump liquid inlet (7), a defrosting hot air inlet (8), a direct expansion air return outlet (9), a first hot air defrosting branch coil pipe (10), a first defrosting hot air header (11), a direct expansion liquid distribution head branch pipe (13), a liquid supply header (14), a liquid supply branch coil pipe (15), a second defrosting hot air pipe (16), a third defrosting hot air pipe (17), a fourth defrosting hot air pipe (21), a fifth defrosting hot air pipe (22), a first stop valve (23), a second stop valve (24), a sixth defrosting hot air pipe (25), a seventh defrosting hot air pipe (26), a second hot air defrosting branch coil pipe (27) and a second defrosting hot air header (28);
the direct expansion liquid supply inlet (6) is connected with the direct expansion liquid supply liquid distribution head (4), the direct expansion liquid supply liquid distribution head (4) is connected with a plurality of liquid supply branch coils (15) through a plurality of direct expansion liquid distribution head branch pipes (13), a plurality of liquid supply branch coils (15) are connected with a plurality of air return branch coils (1), a plurality of air return branch coils (1) are connected to an air return header (2), the air return header (2) is connected with two outlets which are respectively a barrel pump air return outlet (3) and a direct expansion air return outlet (9), the barrel pump air return outlet (3) is an air cooler upper outlet, and the direct expansion air return outlet (9) is an air cooler lower outlet;
the barrel pump liquid supply inlet (7) is connected with the lower part of the liquid supply header (14), and the liquid supply header (14) is connected with each liquid supply branch coil pipe (15);
the defrosting hot gas inlet (8) is connected with a first defrosting hot gas header (11), and the first defrosting hot gas header (11) is connected with a second defrosting hot gas header (28) through a first hot gas defrosting branch coil pipe (10) and a second hot gas defrosting branch coil pipe (27);
the second defrosting hot air header (28) is connected with two branches, including a first branch and a second branch;
the sixth defrosting hot air pipe (25), the first stop valve (23), the fourth defrosting hot air pipe (21), the third defrosting hot air pipe (17) and the first defrosting hot air pipe (5) are sequentially connected in sequence to form the first branch, and the first defrosting hot air pipe (5) is connected with the return air header (2);
the seventh defrosting hot air pipe (26), the second stop valve (24), the fifth defrosting hot air pipe (22) and the second defrosting hot air pipe (16) are sequentially connected in sequence to form a second branch, and the second defrosting hot air pipe (16) is connected with the liquid supply header (14);
the sixth defrosting hot air pipe (25) and the seventh defrosting hot air pipe (26) are connected in parallel to a second defrosting hot air header (28).
2. The novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting according to claim 1 is characterized in that when the structure is applied to direct expansion liquid supply, a refrigerant flows to a direct expansion liquid separation head (4), a direct expansion liquid separation head branch pipe (13), a liquid supply branch pipe coil (15), an air return branch pipe coil (1) and an air return header (2) in sequence through a direct expansion liquid inlet (6), and finally flows out from a direct expansion air return outlet (9); the process of changing the refrigerant from liquid to gas is mainly concentrated in the process of flowing the refrigerant from the liquid supply branch coil (15) to the return air branch coil (1).
3. The novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting according to claim 1 is characterized in that when the structure is applied to barrel pump liquid supply, a refrigerant flows to a liquid supply header (14), a liquid supply branch coil (15), a return air branch coil (1) and a return air header (2) in sequence through a barrel pump liquid inlet (7) and finally flows out from a barrel pump return air outlet (3); the process of changing the refrigerant from liquid to gas is mainly concentrated in the process of flowing the refrigerant from the liquid supply branch coil (15) to the return air branch coil (1).
4. The novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting according to claim 1, wherein a first copper one-way valve (18) is arranged between the second defrosting hot air pipe (16) and the fifth defrosting hot air pipe (22); a second copper one-way valve (19) is arranged between the third defrosting hot air pipe (17) and the fourth defrosting hot air pipe (21).
5. The novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting according to claim 4 is characterized in that when the direct expansion and barrel pump dual-purpose air cooler structure is applied to barrel pump hot gas defrosting, refrigerant hot gas flows to a first defrosting hot gas header (11), a first hot gas defrosting branch pipe coil (10), a second hot gas defrosting branch pipe coil (27), a second defrosting hot gas header (28), a sixth defrosting hot gas pipe (25), a first stop valve (23), a fourth defrosting hot gas pipe (21), a second copper one-way valve (19), a third defrosting hot gas pipe (17), a first defrosting hot gas pipe (5), a return air header (2), a return air branch pipe coil (1), a liquid supply branch pipe coil (15) and a liquid supply header (14) in sequence, and finally flows out from a barrel pump liquid supply inlet (7); the hot gas defrosting phase mainly occurs during the flow from the first hot gas defrosting bypass coil (10) to the second defrosting hot gas header (28) and from the return bypass coil (1) to the supply bypass coil (15).
6. The novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting according to claim 4 is characterized in that when the novel direct expansion and barrel pump dual-purpose air cooler structure is applied to direct expansion hot gas defrosting, refrigerant hot gas flows to a first defrosting hot gas header (11), a first hot gas defrosting branch pipe coil (10), a second hot gas defrosting branch pipe coil (27), a second defrosting hot gas header (28), a seventh defrosting hot gas pipe (26), a second stop valve (24), a fifth defrosting hot gas pipe (22), a first copper one-way valve (18), a second defrosting hot gas pipe (16), a liquid supply header (14), a liquid supply branch pipe coil (15), an air return branch pipe coil (1) and an air return header (2) in sequence, and finally flows out from a direct expansion air return outlet (9); the hot gas defrosting phase mainly occurs during the flow from the first hot gas defrosting bypass coil (10) to the second defrosting hot gas header (28) and from the liquid supply bypass coil (15) to the return air bypass coil (1).
7. The novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting according to claim 1, 2 or 3, wherein direct expansion liquid supply and barrel pump liquid supply are not used simultaneously, and external connection pipe switching of the air cooler structure is performed.
8. The novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting according to claim 1, 5 or 6, characterized in that the second stop valve (24) is closed when direct expansion hot gas defrosting is performed; when hot gas defrosting of the barrel pump is carried out, the first stop valve (23) is closed.
9. The novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting according to claim 1, wherein when the air cooler structure is used for hot gas defrosting, refrigeration cannot be performed, a barrel pump liquid inlet (7) and a direct expansion liquid inlet (6) are closed, and an axial flow fan (20) stops running.
10. The novel direct expansion and barrel pump dual purpose air cooler structure for hot gas defrosting of claim 1 or 9, further comprising a defrosting drain outlet (12) connected with a water pan (29); when hot air defrosting is carried out on the air cooler structure, the defrosting of the water receiving disc (29) is firstly completely melted, so that defrosting water is normally discharged through the defrosting water outlet (12), and then the defrosting of the air cooler structure on the upper portion of the water receiving disc (29) is carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310277858.1A CN116379684A (en) | 2023-03-21 | 2023-03-21 | Novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310277858.1A CN116379684A (en) | 2023-03-21 | 2023-03-21 | Novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116379684A true CN116379684A (en) | 2023-07-04 |
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ID=86970492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310277858.1A Pending CN116379684A (en) | 2023-03-21 | 2023-03-21 | Novel direct expansion and barrel pump dual-purpose air cooler structure suitable for hot gas defrosting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116379684A (en) |
-
2023
- 2023-03-21 CN CN202310277858.1A patent/CN116379684A/en active Pending
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