CN117029327A - Refrigerant heat recovery defrosting system - Google Patents

Refrigerant heat recovery defrosting system Download PDF

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Publication number
CN117029327A
CN117029327A CN202311120844.5A CN202311120844A CN117029327A CN 117029327 A CN117029327 A CN 117029327A CN 202311120844 A CN202311120844 A CN 202311120844A CN 117029327 A CN117029327 A CN 117029327A
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CN
China
Prior art keywords
air cooler
refrigerant
heat recovery
valve
compressor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311120844.5A
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Chinese (zh)
Inventor
邱琳玉
周淋会
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Square Technology Group Co Ltd
Original Assignee
Square Technology Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Square Technology Group Co Ltd filed Critical Square Technology Group Co Ltd
Priority to CN202311120844.5A priority Critical patent/CN117029327A/en
Publication of CN117029327A publication Critical patent/CN117029327A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02Defrosting cycles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/40Fluid line arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/003Filters

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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)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

The invention provides a refrigerant heat recovery defrosting system which comprises a compressor, an air cooler, a refrigerant storage tank, a first refrigerating passage connected between the compressor and the air cooler and used for introducing refrigerant in the compressor into the air cooler, a second refrigerating passage connected between the air cooler and the compressor and used for introducing refrigerant in the air cooler into the compressor, a first defrosting passage connected between the refrigerant storage tank and the air cooler and used for introducing the refrigerant in the refrigerant storage tank into the air cooler, and a second defrosting passage connected between the air cooler and the refrigerant storage tank and used for introducing the refrigerant in the air cooler into the refrigerant storage tank. The invention relates to a refrigeration cycle intercooling refrigeration in a refrigerant heat recovery defrosting systemThe refrigerant and the hot refrigerant in the defrosting cycle pass through the same coil pipe in the air cooler, the coil pipe is not required to be additionally added, the material is saved, the defrosting effect is good, the air cooler is not required to be additionally modified, and the manufacturing difficulty is low

Description

Refrigerant heat recovery defrosting system
Technical Field
The invention relates to a refrigerant heat recovery defrosting system.
Background
In modern society, the application of refrigerant technology has been related to various departments of national economy and daily life of people. In the refrigeration of the areas needing cooling such as a refrigeration house, a workshop air conditioner and the like, an air cooler is inevitably required, and when the temperature of the refrigeration house is lower than 0 ℃, frost is extremely easy to form on the surface of a fin coil of the air cooler, so that the heat transfer effect of the air cooler is poor, and even ventilation of fins is blocked. Therefore, how to conveniently and effectively defrost energy-saving becomes an important problem to be considered in the design of a refrigeration system and the use of an air cooler.
The freezing point of the glycol is different according to different concentrations, when the concentration reaches 50%, the condensation temperature can reach below minus 35 ℃, so the glycol solution is commonly used as a secondary refrigerant, and the difficulty and qualification requirements of design and construction are reduced due to the low pressure of the flow pipeline.
How to realize efficient and energy-saving defrosting in refrigerating pipelines of refrigerating media such as glycol and the like becomes a difficult problem that refrigerating designers need to overcome.
In the prior art, a set of circulating pipelines are used for refrigerating working media, and the hot ethylene glycol for defrosting is used for a set of circulating pipelines, so that the effects of the hot ethylene glycol and the circulating pipelines are not affected. The disadvantage is that a set of hot glycol defrosting pipelines is added, so that the cost is increased, and the ventilation resistance of the air cooler is increased. Meanwhile, the additionally added hot glycol circulation pipeline also needs to consider the flow resistance of the pipeline, and the design and manufacturing difficulty of the air cooler are increased.
In view of this, there is a need for improvements to existing refrigerant heat recovery defrosting systems to address the above-described problems.
Disclosure of Invention
The invention aims to provide a refrigerant heat recovery defrosting system, which aims to solve the problems that the cost is increased and the design and manufacturing difficulty of an air cooler are increased due to the fact that a defrosting pipeline is required to be arranged independently in the existing refrigerating device with a defrosting function.
In order to achieve the above object, the present invention provides a refrigerant heat recovery defrosting system, which includes a compressor, an air cooler, a refrigerant storage tank, a first refrigeration path connected between the compressor and the air cooler for introducing a refrigerant in the compressor to the air cooler, a second refrigeration path connected between the air cooler and the compressor for introducing a refrigerant in the air cooler to the compressor, a first defrosting path connected between the refrigerant storage tank and the air cooler for introducing a refrigerant in the refrigerant storage tank to the air cooler, and a second defrosting path connected between the air cooler and the refrigerant storage tank for introducing a refrigerant in the air cooler to the refrigerant storage tank.
As a further improvement of the invention, the refrigerant heat recovery defrosting system further comprises a heat recovery device and a condenser, wherein the heat recovery device is connected between the compressor and the condenser, and the refrigerant storage tank is connected with the heat recovery device through a liquid inlet pipe and a liquid return pipe.
As a further improvement of the present invention, the first refrigeration path includes a first shut-off valve, a first filter, a first solenoid valve, a first flow rate adjusting valve, and a first check valve connected in sequence between the refrigerant storage tank and the air cooler.
As a further improvement of the invention, the first defrosting channel comprises a second stop valve, a second filter, a second electromagnetic valve, a second flow regulating valve and a second one-way valve which are sequentially connected between the compressor and the air cooler.
As a further improvement of the invention, the first check valve and the second check valve are communicated with the air cooler after being communicated with the third stop valve.
As a further improvement of the invention, a first bleeder valve is arranged between the third stop valve and the air cooler.
As a further improvement of the present invention, the second refrigeration passage includes a fourth stop valve provided between the air cooler and the compressor, the second defrosting passage includes a fifth stop valve provided between the air cooler and the refrigerant storage tank, and the second refrigeration passage, the second defrosting passage and the air cooler are communicated through a three-way valve.
As a further improvement of the invention, a sixth stop valve and a second bleeder valve are arranged between the three-way valve and the air cooler.
As a further improvement of the invention, a ninth stop valve, a second liquid pump and a tenth stop valve are sequentially communicated with the liquid inlet pipe.
As a further improvement of the invention, a seventh stop valve, a first liquid pump and an eighth stop valve are sequentially communicated between the refrigerant storage tank and the first defrosting channel.
As a further improvement of the invention, the refrigerant heat recovery defrosting system also comprises a basin for heating the air cooler, a heating device for heating water in the basin, a water receiving tray arranged below the air cooler and the basin and used for containing defrosting water, and a discharge pipe for discharging water in the water receiving tray.
As a further improvement of the invention, the air coolers of the refrigerant heat recovery defrosting system are in a plurality of groups, and each air cooler is connected with the compressor and the refrigerant storage tank.
The beneficial effects of the invention are as follows: the cold refrigerant in the refrigeration cycle and the hot refrigerant in the defrosting cycle in the refrigerant heat recovery defrosting system pass through the same coil pipe in the air cooler without additionally adding the coil pipe, so that the coil pipe of the air cooler can be fully utilized to realize the functions of refrigeration and defrosting, the material is saved, the defrosting effect is good, the air cooler does not need to be additionally modified, and the manufacturing difficulty is low.
Drawings
Fig. 1 is a schematic structural view of a refrigerant heat recovery defrosting system of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. 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.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1, the refrigerant heat recovery defrosting system 100 of the present invention comprises a compressor 1, an air cooler 2, a refrigerant storage tank 3, a heat recoverer 4, a condenser 5, a first refrigerating path 6 connected between the compressor 1 and the air cooler 2 for introducing the refrigerant in the compressor 1 to the air cooler 2, a second refrigerating path 7 connected between the air cooler 2 and the compressor 1 for introducing the refrigerant in the air cooler 2 to the compressor 1, a first defrosting path 8 connected between the refrigerant storage tank 3 and the air cooler 2 for introducing the refrigerant in the refrigerant storage tank 3 to the air cooler 2, a second defrosting path 9 connected between the air cooler 2 and the refrigerant storage tank 3 for introducing the refrigerant in the air cooler 2 to the refrigerant storage tank 3, a water basin 11 for heating the air cooler 2, a heating device 12 for heating the water in the water basin 11, a water receiving tray 13 arranged below the water basin 2 and the water receiving tray 11 for draining the water to fill and drain the water.
In this embodiment, the refrigerant may be selected from a coolant such as ethylene glycol, propylene glycol, or a brine solution. If ethylene glycol is used as the refrigerant, the pipeline for introducing the refrigerant is a low-pressure pipeline, so that the difficulty in design and construction is reduced. The refrigerant heat recovery defrosting system 100 can cover cooling of a temperature area of-35 ℃ and above, and has wide applicable temperature area range.
The air coolers 2 of the refrigerant heat recovery defrosting system 100 are in a plurality of groups, and each air cooler 2 is connected with the compressor 1 and the refrigerant storage tank 3.
The first cooling passage 6 includes a first shut-off valve 61, a first filter 62, a first solenoid valve 63, a first flow rate adjusting valve 64, and a first check valve 65, which are sequentially connected between the refrigerant storage tank 3 and the air cooler 2.
The first defrosting path 8 includes a second shut-off valve 81, a second filter 82, a second solenoid valve 83, a second flow rate adjusting valve 84, and a second check valve 85, which are sequentially connected between the compressor 1 and the air cooler 2.
The first check valve 65 and the second check valve 85 are both communicated with the third stop valve 66 and then communicated with the air cooler 2. A first bleeder valve 67 is arranged between the third stop valve 66 and the air cooler 2.
The first stop valve 61 and the third stop valve 66 play a role in stopping maintenance, the first electromagnetic valve 63 realizes refrigeration automation control, and the first flow regulating valve 64 can be used for regulating the flow of the inlet refrigerant. The second flow regulating valve 84 is used to regulate the amount of defrost refrigerant flow.
The first bleeder valve 67 is used for discharging the refrigerant solution in the air cooler 2 completely when the air cooler 2 needs to be maintained.
The second refrigeration passage 7 includes a fourth stop valve 71 provided between the air cooler 2 and the compressor 1, the second defrosting passage 9 includes a fifth stop valve 91 provided between the air cooler 2 and the refrigerant storage tank 3, and the second refrigeration passage 7, the second defrosting passage 9 and the air cooler 2 are communicated through a three-way valve 72.
A sixth stop valve 73 and a second drain valve 74 are arranged between the three-way valve 72 and the air cooler 2.
A seventh stop valve 31, a first liquid pump 32 and an eighth stop valve 33 are sequentially communicated between the refrigerant storage tank 3 and the first defrosting channel 8.
The heat recoverer 4 is connected between the compressor 1 and the condenser 5, and the refrigerant storage tank 3 and the heat recoverer 4 are connected through a liquid inlet pipe 14 and a liquid return pipe 15.
The liquid inlet pipe 14 is sequentially provided with a ninth stop valve 34, a second liquid pump 35 and a tenth stop valve 36.
When the compressor 1 is used as a refrigeration cycle, a low-temperature refrigerant is generated by refrigeration, and the low-temperature refrigerant enters the air cooler 2 after passing through the third stop valve 66, the first stop valve 61, the first filter 62, the first electromagnetic valve 63, the first flow regulating valve 64 and the first check valve 65.
The low-temperature refrigerant exchanges heat with air after entering the air cooler 2, and cools the air. After that, the refrigerant returns to the compressor 1 again through the sixth shut-off valve 73, the three-way valve 72, and the fourth shut-off valve 71, thereby realizing a refrigeration cycle.
When defrosting is needed, the first electromagnetic valve 63 is closed, the low-temperature refrigerant does not enter the air cooler 2 any more, the three-way valve 72 on the air cooler 2 is electrified to work, and the flowing direction of the three-way valve is turned to the fifth stop valve 91. The hot refrigerant in the refrigerant storage tank 3 enters the second stop valve 81, the second filter 82, the second electromagnetic valve 83, the second flow regulating valve 84 and the second check valve 85 of the same air cooler 2 after passing through the seventh stop valve 31, the first liquid pump 32 and the eighth stop valve 33, and then enters the air cooler 2 after passing through the third stop valve 66. Because of the presence of the first check valve 65, hot refrigerant does not flow through the first check valve 65 and into the first refrigeration path 6. After entering the air cooler 2, the hot refrigerant melts the frost on the surface of the fin coil through heat conduction. The defrost water is drained through the drip tray 13 and drain. The refrigerant after heat transfer and temperature reduction passes through the sixth stop valve 73, the three-way valve 72 and the fifth stop valve 91 and is collected into the refrigerant storage tank 3. This achieves a defrost cycle.
The automatic control only needs to control the work of the first electromagnetic valve 63, the second electromagnetic valve 83 and the three-way valve 72, and the automatic actions of refrigeration and defrosting can be realized through simple control, so that unmanned operation can be realized.
The water basin 11 is arranged above the water receiving tray 13, and is used for containing defrosting water first, and the heating device 12 is used for heating the water basin 11 to prevent the defrosting water from freezing again in the water basin 11. When the air cooler 2 is smaller, the heating device 12 may be a hot refrigerant pipe, if the air cooler 2 is larger, the heating effect of the hot refrigerant pipe is limited, and the electric heating device 12 may also be additionally provided.
A temperature sensor is disposed in the refrigerant storage tank 3, when it is detected that the temperature of the refrigerant in the refrigerant storage tank 3 is low, and when the compressor 1 group is operating at this time, the second liquid pump 35 starts to operate, the refrigerant with low temperature enters the heat recoverer 4 after passing through the ninth stop valve 34, the second liquid pump 35 and the tenth stop valve 36, and the exhaust waste heat of the compressor 1 is recovered by heat exchange with the hot refrigerant gas in another pipeline of the heat recoverer 4, so that the refrigerant is heated, and the heated hot refrigerant returns to the refrigerant storage tank 3 through the liquid return pipe 15. This is the heat recovery cycle of ethylene glycol.
When the compressor 1 group is operated, the refrigerant gas with high temperature and high pressure enters a heat recovery period, heat is transferred to the refrigerant, the refrigerant gas enters the condenser 5 to be condensed, and condensed refrigerant liquid returns to the compressor 1 again, wherein the above is the heat extraction condensation cycle of the refrigerating compressor 1 group. The energy-saving effect is obvious by recovering exhaust waste heat of the compressor 1 to defrost.
The cold refrigerant in the refrigeration cycle and the hot refrigerant in the defrosting cycle in the refrigerant heat recovery defrosting system 100 pass through the same coil pipe in the air cooler 2 without additionally adding the coil pipe, so that the coil pipe of the air cooler 2 can be fully utilized to realize the refrigeration and defrosting functions, the materials are saved, the defrosting effect is good, the air cooler does not need to be additionally modified, the manufacturing difficulty is low, the same working medium is adopted for refrigeration and heating, and the risk of mixing different working media due to leakage of a valve is not required. The system is simple and has high reliability.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (12)

1. A refrigerant heat recovery defrosting system characterized by: the refrigerant heat recovery defrosting system comprises a compressor, an air cooler, a refrigerant storage tank, a first refrigerating passage connected between the compressor and the air cooler and used for introducing refrigerant in the compressor into the air cooler, a second refrigerating passage connected between the air cooler and the compressor and used for introducing refrigerant in the air cooler into the compressor, a first defrosting passage connected between the refrigerant storage tank and the air cooler and used for introducing refrigerant in the refrigerant storage tank into the air cooler, and a second defrosting passage connected between the air cooler and the refrigerant storage tank and used for introducing refrigerant in the air cooler into the refrigerant storage tank.
2. The refrigerant heat recovery defrosting system of claim 1 wherein: the refrigerant heat recovery defrosting system further comprises a heat recoverer and a condenser, wherein the heat recoverer is connected between the compressor and the condenser, and the refrigerant storage tank is connected with the heat recoverer through a liquid inlet pipe and a liquid return pipe.
3. The refrigerant heat recovery defrosting system of claim 1 wherein: the first refrigeration passage comprises a first stop valve, a first filter, a first electromagnetic valve, a first flow regulating valve and a first one-way valve which are sequentially connected between the refrigerant storage tank and the air cooler.
4. A refrigerant heat recovery defrosting system according to claim 3, wherein: the first defrosting channel comprises a second stop valve, a second filter, a second electromagnetic valve, a second flow regulating valve and a second one-way valve which are sequentially connected between the compressor and the air cooler.
5. The refrigerant heat recovery defrosting system of claim 4 wherein: the first check valve and the second check valve are communicated with the third stop valve and then communicated with the air cooler.
6. The refrigerant heat recovery defrosting system of claim 5 wherein: and a first bleeder valve is arranged between the third stop valve and the air cooler.
7. The refrigerant heat recovery defrosting system of claim 1 wherein: the second refrigerating passage comprises a fourth stop valve arranged between the air cooler and the compressor, the second defrosting passage comprises a fifth stop valve arranged between the air cooler and the refrigerant storage tank, and the second refrigerating passage, the second defrosting passage and the air cooler are communicated through a three-way valve.
8. The refrigerant heat recovery defrosting system of claim 7 wherein: a sixth stop valve and a second leakage valve are arranged between the three-way valve and the air cooler.
9. The refrigerant heat recovery defrosting system of claim 2 wherein: and the liquid inlet pipe is sequentially communicated with a ninth stop valve, a second liquid pump and a tenth stop valve.
10. The refrigerant heat recovery defrosting system of claim 1 wherein: and a seventh stop valve, a first liquid pump and an eighth stop valve are sequentially communicated between the refrigerant storage tank and the first defrosting channel.
11. The refrigerant heat recovery defrosting system of claim 1 wherein: the refrigerating fluid heat recovery defrosting system further comprises a basin for heating the air cooler, a heating device for heating water in the basin, a water receiving tray arranged below the air cooler and the basin and used for containing defrosting water, and a discharge pipe for discharging water in the water receiving tray.
12. The refrigerant heat recovery defrosting system of claim 1 wherein: and the air coolers of the refrigerant heat recovery defrosting system are multiple groups, and each air cooler is connected with the compressor and the refrigerant storage box.
CN202311120844.5A 2023-08-31 2023-08-31 Refrigerant heat recovery defrosting system Pending CN117029327A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311120844.5A CN117029327A (en) 2023-08-31 2023-08-31 Refrigerant heat recovery defrosting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311120844.5A CN117029327A (en) 2023-08-31 2023-08-31 Refrigerant heat recovery defrosting system

Publications (1)

Publication Number Publication Date
CN117029327A true CN117029327A (en) 2023-11-10

Family

ID=88639765

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311120844.5A Pending CN117029327A (en) 2023-08-31 2023-08-31 Refrigerant heat recovery defrosting system

Country Status (1)

Country Link
CN (1) CN117029327A (en)

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