Evaporation cooling all-in-one machine special for large and medium-sized refrigeration houses of Freon system
By designing an evaporative condenser specifically for large and medium-sized cold storage facilities using Freon systems, and utilizing multi-stage circulating heat exchange with screw compressors and oil-water separators, the problems of large weight and long construction period of evaporative condensers have been solved, achieving a low-cost and efficient cold storage refrigeration solution.
Patent Information
- Application Number
- CN202520128251.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-01-20
AI Technical Summary
Existing cold storage facilities use heavy evaporative condensers, which require separate machine rooms, have long construction periods, high costs, and are difficult to meet the space and rain protection requirements of refrigeration systems.
An evaporative refrigeration unit specifically designed for large and medium-sized cold storage facilities using Freon systems was designed. It includes a top axial flow fan, condenser coils, and an integrated unit side casing. It adopts a screw compressor and an oil-water separator to achieve multi-stage utilization and circulating heat exchange of high-temperature and high-pressure gases. Combined with a counter-flow structure, it reduces equipment size and construction requirements.
This design achieves a compact overall size, short construction period, and low cost integrated evaporative cooling unit, reducing machine room costs and construction time, improving condensation efficiency, saving Freon charging, and is suitable for modular installation and centralized management.
Smart Images
Figure CN223710022U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of refrigeration and refrigeration equipment, especially to a refrigeration and refrigeration equipment field evaporative cooling integrated machine special for freon system large and medium-sized refrigeration house. BACKGROUND
[0002] At present, the higher the industrialization and urbanization degree of the country and region is, the greater the spatio-temporal separation degree of food production and consumption is, and the deeper the dependence on food storage and transportation is. Cold chain is an important production mode for integrating the production of agriculture, forestry, animal husbandry and fishery with catering consumption in industrialized and urbanized countries and regions, and full-process cold chain is a basic condition for ensuring food safety and quality. The development of national industrialization and urbanization improves the consumption level of residents, and the demand for frozen products such as seafood, poultry products, ice cream products and quick-frozen food is increasing. For cold chain facilities, the refrigeration system is the core of the facility equipment, and the facility equipment technology is mainly reflected in the engineering design and construction link of the refrigeration system. With the development of industrialization and urbanization, people pay more and more attention to the green, efficient and fluorine recharge of the cold chain system. The refrigeration capacity of the cold chain logistics refrigeration house is not large, and the cost of building a separate machine room is high. This efficient evaporative cooling integrated machine has been widely applied.
[0003] The existing cold chain logistics refrigeration house is generally a multi-layer refrigeration house or a stereoscopic high-rise refrigeration house, especially the recent full-automatic high-rise refrigeration house is a trend, all of its shelves are full-automatic operation, and such refrigeration house mostly builds a separate machine room. However, the multi-layer refrigeration house generally has more single refrigeration houses, the whole building refrigeration house body is integrated with the heat preservation outer wall, the internal floor is separated, and there is no separate position for building a machine room. Some put the unit in the hall, make a simple machine room, and consider the load bearing of the evaporative condenser placed on the roof of the refrigeration house. On the one hand, the load bearing of the whole building needs to consider the weight of the evaporative condenser per unit area, the investment cost is high, the heat dissipation of the evaporative condenser needs to consider ventilation; on the other hand, the electrical elements and control box of the refrigeration unit and the compressor head need to be treated to prevent rain. A separate container machine room or board room machine room is built, and the evaporative condenser load bearing is separately made of steel structure; thus, the on-site construction work amount is large, and the construction period is long.
[0004] At present, the evaporative condenser runs with large weight, needs ventilation space, and is placed on the top of a separate machine room or a load-bearing position on the roof of a cold storage; the evaporative cooling integrated unit needs to consider maintenance, heat dissipation space, rainproof treatment, etc.; the working medium cooling of the compressor oil cooler needs to consider the height difference between the evaporative cooling liquid and the unit, and the height of the machine room is required to be higher, the evaporative condenser and the unit are generally considered as an upper and lower structure, and it is difficult to make the evaporative cooling integrated unit; the height of the evaporative condenser and the siphon height requirement of the medium cooling of the compressor during transportation need to be considered during the manufacturing of the evaporative cooling integrated unit, the chilled water unit in the central air conditioning system is generally a water / oil cooler or a selected unit, and the occupied area is small, and the central air conditioning system generally uses a cooling tower, and the height problem does not need to be considered. SUMMARY
[0005] The utility model discloses in order to make up for the deficiency of prior art, provides a whole volume is small, is suitable for module installation, construction cycle is short, and the fluorine system large and medium-sized cold storage special evaporative cooling integrated unit of low operating cost.
[0006] The utility model discloses a technical scheme is realized as follows:
[0007] A fluorine system large and medium-sized cold storage special evaporative cooling integrated unit, including top installation axial flow fan, the condensing unit of internal installation condensing coil, condensing unit one side is provided with the unit side box body of integration assembly with it, its characterized in that: condensing unit is equipped with air inlet and condensate water outlet on one side of unit side box body, and the gas-liquid separator, screw compressor, oil-water separator, water pump, high-pressure liquid accumulator and control box are installed in unit side box body, wherein, the gas-liquid separator, screw compressor and oil-water separator are communicated in proper order, the air outlet of oil-water separator communicates exhaust header, and the outlet of exhaust header communicates the air inlet of condensing unit, and the air inlet of oil-water separator communicates the back air pipe installed on the unit side box body, the water distributor inlet of water distributor is connected with the water pump through the condensate water outlet of condensing unit, the outlet of liquid drop collector communicates the import of high-pressure liquid accumulator, and the export of high-pressure liquid accumulator communicates the refrigerant supply pipe arranged on the unit side box body.
[0008] The utility model discloses in order to make up for the deficiency of prior art, provides a whole volume is small, is suitable for module installation, construction cycle is short, and the fluorine system large and medium-sized cold storage special evaporative cooling integrated unit of low operating cost.
[0009] The more optimal technical scheme of the utility model discloses:
[0010] The refrigerant liquid supply pipe is connected with the liquid inlet of the evaporator, and the gas outlet of the evaporator is connected with the gas return pipe; the condensing liquid is changed into low-temperature and low-pressure gas by absorbing heat through convection heat exchange, and then returns to the gas-liquid separator through the gas return pipe, so as to realize recycling.
[0011] The economizer is installed in the unit side box body, the outlet of the high-pressure liquid storage tank is connected with the inlet of the economizer, and the outlet of the economizer is connected with the refrigerant liquid supply pipe, so that the sub-cooling of the collected falling liquid after secondary heat exchange is realized, and then the liquid supply refrigerant is supplied to the liquid supply pipe.
[0012] The condensing unit is a closed structure, the shell is an aluminized zinc shell, the condensing coil is installed in the shell, air supplied by the axial flow fan is circulated and heat-exchanged in the condensing unit, and a water separator is installed on the condensing coil to remove the condensing liquid attached to the condensing coil, so as to improve the heat exchange efficiency.
[0013] A plurality of position-symmetrical louvered ventilation openings are arranged at the top end of the unit side box body, which are used for ventilation of the unit side box body or ventilation in case of leakage of the unit pipeline.
[0014] In order to facilitate maintenance, disassembly and assembly of the compressor, a unit maintenance door is installed on the operation channel side of the unit side box body, and the unit maintenance door is fixed on the bearing structure of the unit side box body through a door hinge; the wall plate of the unit side box body is a ribbed plate detachable door with a radiator, which facilitates wide-range maintenance of the unit.
[0015] The screw compressor is filled with R507 refrigerant, and the small pressure difference between high pressure and low pressure of the R507 refrigerant is utilized to maximize the compression of the maintenance space and the transportation height of the unit side box body.
[0016] The overall height of the evaporative cooling all-in-one machine is 3000mm, the total width is 2270mm, and the total length is 7360mm, so that the volume parameters facilitate transportation and hoisting of the unit, and transportation cost is saved.
[0017] The utility model discloses a reasonable structure, small overall volume, suitable for modular prefabricated installation, and the unit and evaporative condenser and other equipment are integrated in the all-in-one machine, so that the construction cost investment of the machine room is reduced, and the construction period is shortened; the unit is integrated and modularized, control wires and cables and controllers are reduced, centralized management and remote control are facilitated, and the transportation and hoisting cost of the unit is low. BRIEF DESCRIPTION OF DRAWINGS
[0018] The utility model will be further described below with reference to the drawings.
[0019] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;
[0020] Figure 2 It is the main view structure schematic diagram of the utility model;
[0021] Figure 3 It is the right view structural schematic drawing of the utility model;
[0022] Figure 4 It is the plan view structural schematic drawing of the utility model.
[0023] In the drawing, 1 is an axial flow fan, 2 is an aluminized zinc shell, 3 is a screw compressor, 4 is an oil-water separator, 5 is an exhaust manifold, 6 is a control box, 7 is a return air pipe, 8 is a gas-liquid separator, 9 is a water outlet, 10 is a water pump, 11 is a water distributor inlet, 12 is a refrigerant supply pipe, 13 is a louvered air vent, 14 is a high-pressure liquid accumulator, 15 is a unit maintenance door, 16 is a door hinge, 17 is a ribbed plate detachable door, and 18 is a condensing coil. DETAILED DESCRIPTION
[0024] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below in combination with the drawings. In the following description, a large number of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0026] The utility model is described in detail below in combination with the drawings: the embodiment includes top installation axial flow fan 1, condensing unit of inside installation condensing coil 18, condensing unit one side is provided with unit side box body of integration assembly with it, condensing unit is equipped with air inlet and condensing water outlet 9 on unit side box body one side, gas-liquid separator 8, screw compressor 3, oil-water separator 4, water pump 10, high-pressure liquid accumulator 14 and control box 6 are installed in unit side box body, wherein, gas-liquid separator 8, screw compressor 3 and oil-water separator 4 are communicated in proper order, the air outlet of oil-water separator 4 is communicated exhaust manifold 5, the outlet of exhaust manifold 5 is communicated the air inlet of condensing unit, the air inlet of oil-water separator 4 is communicated and installs return air pipe 7 on unit side box body;Condensing unit inside top end is installed with water distributor, and the bottom is installed with liquid fall collector, and the water outlet 9 of condensing unit is connected with the water distributor inlet 11 of water distributor through water pump 10, and the outlet of liquid fall collector is communicated with the inlet of high-pressure liquid accumulator 14, and the outlet of high-pressure liquid accumulator 14 is communicated with the refrigerant supply pipe 12 arranged on the unit side box body.
[0027] As shown in the accompanying drawings Figures 1-4 The working principle of the cold and cold integrated machine of the present embodiment is as follows:
[0028] The low-temperature and low-pressure gas passes through the gas return pipe 7 to the gas-liquid separator 8. After gas-liquid separation, the gas is sucked into the screw compressor 3 to become high-temperature and high-pressure gas. The high-temperature and high-pressure gas passes through the oil-water separator 4 and enters the exhaust header 5. The exhaust header 5 sends the collected high-temperature and high-pressure gas to the condensing coil 18 of the condensing unit. The axial flow fan 1 at the top of the condensing unit draws air into the unit box and exchanges heat with the high-temperature and high-pressure gas in the condensing coil 18. The gas after heat exchange becomes medium-temperature liquid and is discharged from the condensing water outlet 9 of the condensing coil 18. The medium-temperature liquid is sent to the water distributor at the top of the condensing unit through the water pump 10 and the water distributor inlet 11. The water distributor sprays water in the condensing unit box to exchange heat with the air in the box. The sprayed water is collected by the liquid collector at the bottom of the water crystal condensing unit and then sent to the high-pressure liquid accumulator 14 in the side box of the unit.
[0029] The economic device is installed in the side box of the unit. The outlet of the high-pressure liquid accumulator 14 is connected to the inlet of the economic device. The collected cooling liquid is supercooled by the economic device. The outlet of the economic device is connected to the refrigerant liquid supply pipe 12. The refrigerant liquid supply pipe 12 is connected to the liquid inlet of the evaporator. The throttling and pressure-reduced cooling liquid is sent to the evaporator at the end through the refrigerant liquid supply pipe 12. The cooling liquid is changed into low-temperature and low-pressure gas by convection heat exchange. The gas outlet of the evaporator is connected to the gas return pipe 7. The low-temperature and low-pressure gas is sent to the gas-liquid separator 8 through the gas return pipe 7. The cycle continues.
[0030] Considering the size of the evaporative cooling integrated machine, the evaporative condensing unit of the present embodiment adopts a counterflow type. The heat rejection of the condensing unit depends on the area of the condensing coil 18, the ventilation volume of the axial flow fan 1, and the water flow of the water pump 10. During operation, the present embodiment increases the ventilation circulation volume of the axial flow fan 1 by 50% and the water flow of the water pump 10 by 20% to reduce the size of the condensing coil 18 by 50%. In the case of ensuring the condensing effect, the size of the evaporative cooling integrated machine is minimized.
[0031] The side box of the unit needs to consider the maintenance space and the transportation height. Therefore, in the present embodiment, the screw compressor is filled with R507 refrigerant, which has a small high-low pressure difference. The high-low temperature screw compressor generally does not need an oil cooler. Even if the outdoor ventilation temperature is high in summer, the unit can use the siphon type oil cooler. The total height of the side box of the unit is generally not more than 2000mm. Considering the pipe installation space of the side box of the unit, the overall size of the evaporative cooling integrated machine of the present embodiment is 3000mm in height, 2270mm in total width, and 7360mm in total length. This facilitates the transportation and hoisting of the unit.
[0032] In this embodiment, the condensing unit is a closed structure, the shell thereof is an aluminized zinc shell 2, the condensing coil 18 is installed in the shell, and a water separator is installed on the condensing coil 18.
[0033] A plurality of position-symmetrical louvered air vents 13 are arranged at the top end of the unit-side box body, which are used for unit-side ventilation and air exchange or unit-pipe leakage accident ventilation.
[0034] The technical effects of the all-in-one machine are embodied in:
[0035] (1) The evaporative cooling all-in-one machine does not need to establish a machine room separately, thereby saving the machine room cost of about 150,000 yuan;
[0036] (2) The evaporative cooling all-in-one machine reduces the construction period by more than 20 days, the unit is integrally prefabricated and modularized in the factory, the integral quality has packaging, and the unit is convenient for centralized management, and the electrical modular production saves the cost of about 50,000 yuan;
[0037] (3) The evaporative cooling all-in-one machine can meet the requirements of heat dissipation and ventilation of the evaporative condenser and the requirements of rain and water proofing of the unit, and an accident ventilation axial flow fan is arranged, the all-in-one machine produced in an integrated mode has few pipelines, adopts a direct expansion liquid supply mode, and compared with an original freon direct expansion unit, the evaporative cooling all-in-one machine saves the charging amount of freon by more than 15%;
[0038] (4) The evaporative cooling all-in-one machine adopts a counterflow type evaporative condenser, a high-efficiency belt type variable frequency axial flow fan and a high-efficiency water pump, improves the condensing efficiency by more than 20%, reduces the volume of the evaporative condenser by about 40%, the original evaporative condenser is installed in powder, the evaporative cooling all-in-one machine is integrally hoisted, and the unit and the evaporative cooling are hoisted in a split body, and compared with the split body hoisting, one unit saves more than 20,000 yuan;
[0039] (5) The evaporative cooling all-in-one machine does not need to establish a foundation for the unit, thereby shortening the construction period and construction cost;
[0040] (6) The total width and total length of the evaporative cooling all-in-one machine are considered in combination, which is convenient for unit transportation and hoisting, and saves transportation cost.
[0041] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.
Claims
1. A condensing chiller for large and medium-sized cold storage using a Freon system, comprising a condensing unit with an axial flow fan (1) mounted on top and condensing coils (18) installed inside, and a unit side casing integrated with the condensing unit on one side, characterized in that: The condensing unit has an air inlet and a condensate outlet (9) on one side of the unit side housing. The unit side housing is equipped with a gas-liquid separator (8), a screw compressor (3), an oil-water separator (4), a water pump (10), a high-pressure liquid receiver (14), and a control box (6). The gas-liquid separator (8), the screw compressor (3), and the oil-water separator (4) are connected in sequence. The outlet of the oil-water separator (4) is connected to the exhaust manifold (5), and the outlet of the exhaust manifold (5) is connected to the air inlet of the condensing unit. The air inlet of the oil-water separator (4) is connected to the return air pipe (7) installed on the unit side housing. A water distributor is installed at the top of the condensing unit, and a liquid collector is installed at the bottom. The condensate outlet (9) of the condensing unit is connected to the water distributor inlet (11) of the water distributor through the water pump (10). The outlet of the liquid collector is connected to the inlet of the high-pressure liquid receiver (14), and the outlet of the high-pressure liquid receiver (14) is connected to the refrigerant supply pipe (12) installed on the unit side housing.
2. The evaporative refrigeration unit for large and medium-sized cold storage using Freon systems as described in claim 1, characterized in that: The refrigerant supply pipe (12) is connected to the liquid inlet of the evaporator, and the gas outlet of the evaporator is connected to the return gas pipe (7).
3. The evaporative refrigeration unit for large and medium-sized cold storage using Freon systems as described in claim 1, characterized in that: An economizer is installed inside the unit's side housing. The outlet of the high-pressure liquid receiver (14) is connected to the inlet of the economizer, and the outlet of the economizer is connected to the refrigerant supply pipe (12).
4. The evaporative refrigeration unit for large and medium-sized cold storage using Freon systems as described in claim 1, characterized in that: The condenser unit is a closed structure with an aluminum-zinc coated shell (2). The condenser coil (18) is installed inside the shell and a water separator is installed on the condenser coil (18).
5. The evaporative refrigeration unit for large and medium-sized cold storage using Freon systems as described in claim 1, characterized in that: The top of the side box of the unit has several symmetrically positioned louvered ventilation openings (13).
6. The evaporative refrigeration unit for large and medium-sized cold storage using Freon systems as described in claim 1, characterized in that: The unit side enclosure is equipped with a unit maintenance door (15) on the side of the operating passage. The unit maintenance door (15) is fixed to the load-bearing structure of the unit side enclosure by door hinges (16). The wall panel of the unit side enclosure is a detachable door (17) with radiator ribs.
7. The evaporative refrigeration unit for large and medium-sized cold storage using Freon systems as described in claim 1, characterized in that: The screw compressor (3) is filled with R507 refrigerant.
8. The evaporative refrigeration unit for large and medium-sized cold storage using Freon systems as described in claim 1, characterized in that: The evaporative refrigeration unit has a height of 3000mm, a total width of 2270mm, and a total length of 7360mm.