CN211953337U

CN211953337U - Integrated mixed cooling cold water module unit

Info

Publication number: CN211953337U
Application number: CN201922243846.9U
Authority: CN
Inventors: 李国斌
Original assignee: Hanrun United High Tech Development Beijing Co ltd
Current assignee: Hanrun United High Tech Development Beijing Co ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-11-17
Anticipated expiration: 2029-12-13

Abstract

The utility model discloses an integrated mixed cooling cold water module unit, which comprises a small cooling tower shell, a cooling system, a refrigerant circulating system and a functional module, wherein the cooling system, the refrigerant circulating system and the functional module are integrated in the small cooling tower shell; the cooling system comprises a fan, a water distributor, a cooling circulating pump, a sprayer and a cooling water tank, and the refrigerant circulating system comprises a low-power compressor, an evaporative cooling heat exchanger, a tubular immersion condenser, an indoor side heat exchanger and a gas-liquid separator; the functional module comprises a liquid storage tank, a drying filter and an expansion valve which are connected in sequence; the small-power compressor, the liquid storage tank, the drying filter, the expansion valve and the indoor side heat exchanger are arranged at the lower part of the interior of the small cooling tower shell; the evaporative cooling heat exchanger is arranged above the cooling water of the cooling water tank, and the tube array immersion condenser is immersed in the cooling water of the cooling water tank; the water distributor is arranged at the bottom inside the cooling water tank.

Description

Integrated mixed cooling cold water module unit

Technical Field

The utility model relates to an air conditioning equipment field especially relates to a cooling system and refrigeration system height fit integration, many parallelly connected small-size modularization installations, can mix the refrigeration module unit of evaporation cold and water-cooling refrigeration mode or directly expand (ally oneself with) module unit.

Background

At present, the mainstream refrigeration air conditioning unit mainly comprises a single-cooling water chilling unit and an air cooling water chilling unit, and the water cooling unit has a remarkable energy-saving effect about 30% of refrigeration energy saving compared with the air cooling water chilling unit, and the water chilling unit generally adopts a screw compressor or a centrifugal compressor, and the refrigerating capacity of a single unit is less, namely hundreds of kilowatts and more, namely thousands of kilowatts, so that the water cooling unit can meet the requirements of medium and large buildings or building clusters, and the water cooling water chilling unit is a preferred model of refrigeration air conditioning in summer and is widely applied to medium and large buildings or building clusters in factories, office buildings, apartments, hotels, airports, hospitals, schools and the like.

Although the water-cooling water chilling unit has higher refrigeration energy efficiency and higher refrigeration capacity, the following defects exist: 1. and a specific machine room is needed, and when the installation floor space of the main machine is small, more than hundreds of square meters and thousands of square meters are needed, the waste of the effective utilization area of the building main body is caused. At present, land resources are tense, real estate regulation and control are stricter, and the method has important significance in reducing the land use area and improving the building utilization rate; in engineering practice, some newly-built and reconstructed buildings cannot be provided with a refrigeration main machine indoors due to indoor space limitation caused by various reasons, and therefore the air-conditioning operation cost is greatly increased by adopting an air-cooling unit substitution scheme. 2. The separation of the cooling tower and the refrigeration main machine causes the overlong cooling circulation pipe network to increase the construction amount and the construction cost. The water-cooled refrigerating unit machine room is generally arranged in the underground part of a building main body, and the cooling tower is arranged on the roof of the building main body. The cooling water supply and return network construction difficulty is high and the requirement on construction professional degree is strong when the cooling main machine and the cooling tower are few, dozens of meters and hundreds of meters, and the pipe diameter is large. And meanwhile, the air conditioner is also an important factor causing high overall construction cost of the air conditioner project. 3. The cooling circulation pump has high power consumption. Because the height difference between the refrigeration main machine and the cooling tower is large, the lift of the cooling circulating pump is increased under the condition of fixed flow, the power of the circulating pump is improved, and the energy consumption is correspondingly increased. In addition, the existing water chilling unit mostly adopts a shell-and-tube heat exchanger, and the required flow rate is high due to the short shell pass, so that the pressure difference of a fluid inlet and a fluid outlet is large, the fluid resistance in the shell is greatly increased, the power of a circulating pump is increased, and the energy consumption is increased. 4. The water chilling unit generally adopts a high-power screw compressor (the single machine consumes more than 100 KW) or a centrifugal compressor (the single machine consumes more than 200KW-1000 KW), and the weight of the unit is less, so that one or two tons of the unit weigh several tons, and the unit is difficult to transport and high in installation difficulty. 5. The stability is poor. Because the price of a single machine of the large-scale water chilling unit is high, a double-head compressor is adopted instead of a one-by-one machine set for improving the operation stability, so that potential safety hazards exist in the whole refrigeration operation, and the use is not influenced by the availability when a refrigeration main machine breaks down. 6. The water-cooling water chilling unit is not easy to maintain and has high maintenance cost. 7. The utilization rate of cooling water is low, a more efficient cooler is needed, the utilization rate of water is improved, and the cooling efficiency is improved. Because the heat exchange between the refrigerant and the cooling medium is completely carried out in the closed heat exchanger shell, the evaporation of the cooling medium (water) is not facilitated, the evaporation capacity of latent heat of vaporization of the water is reduced, and the cooling effect of the water is reduced. 8. The cooling water tower has serious water flying, which causes water resource waste. 9. The water-cooled chiller has serious noise pollution. The standard requirement is 45-55 dB, and the number of water chilling units is more than 100 dB, so the water chilling unit is an important noise pollution source of a building, a large amount of additional investment is required for noise reduction, the standard requirement is difficult to achieve, the use comfort of the building is influenced, and the health of related workers is also influenced.

The existing air conditioner in the market transfers an indoor refrigeration host machine to a cooling tower on a roof, builds a box body matched with the shape of the cooling tower for the refrigeration host machine, and integrates the refrigeration host machine, a cooling circulating pump and a cooling circulating pipeline to form a water chilling unit with an integrated shape. The design can save an indoor machine room, shorten an extension pipe network between the traditional machine room and a cooling tower, and reduce the lift of a cooling pump, but the essential of the design is only to simply assemble an outdoor cooling tower and an indoor part of a refrigeration host machine and integrate engineering, and the other problems of the water chilling unit in the prior art can not be solved. And the roof stress is too concentrated due to the increase of the local load of the roof after the cooling tower and the refrigeration host are assembled and integrated in engineering, and the roof machine room is taken as one part of the building and needs to be examined, approved and accepted, and the like, so that the load is specially designed according to the building specification, and the roof machine room cannot be installed. In addition, there is a patent of a cold and hot water unit with a plate-tube composite heat exchange type evaporative condenser, which also improves the heat exchange efficiency to a greater extent only by changing the heat exchange structure of the coil, but does not relate to the high integration of the cooling system (cooling tower) and the refrigeration system, and the method of mixing evaporative cooling and water cooling refrigeration, so that the above other problems in the prior art still exist.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an integration mixes cold water module unit, it is big to solve the cooling water unit cooling water consumption, heat exchange efficiency is low, water-cooling water unit computer lab area occupies the waste that the indoor space leads to building utilization to reduce greatly, the cooling tower is high with the cooling pipe network overlength construction degree of difficulty that the cooling water unit separation was sent, construction cost increases, large-scale cooling water unit is difficult to transport, the installation, maintain, the cooling pump energy consumption height leads to the whole refrigeration efficiency of unit to reduce, cooling water unit noise is big, easily produce noise pollution scheduling problem.

In order to solve the technical problem, the utility model discloses a technical scheme does:

the integrated mixed cooling cold water module unit comprises a small cooling tower shell, a cooling system, a refrigerant circulating system (refrigerating system) and a functional module, wherein the cooling system, the refrigerant circulating system (refrigerating system) and the functional module are integrated in the small cooling tower shell; the cooling system comprises a fan, a water distributor, a cooling circulating pump, a sprayer and a cooling water tank, and the refrigerant circulating system comprises a low-power compressor, an evaporative cooling heat exchanger, a tubular immersion condenser, an indoor side heat exchanger and a gas-liquid separator; the functional module comprises a liquid storage tank, a drying filter and an expansion valve which are connected in sequence; the small-power compressor, the liquid storage tank, the drying filter, the expansion valve and the indoor side heat exchanger are arranged at the lower part of the interior of the small cooling tower shell; the evaporative cooling heat exchanger is arranged above the cooling water of the cooling water tank, and the tube array immersion condenser is immersed in the cooling water of the cooling water tank; the water distributor is arranged at the bottom inside the cooling water tank; the sprayer is arranged above the evaporative cooling heat exchanger and is used for spraying water to the surface of the evaporative cooling heat exchanger and absorbing heat; the fan is arranged at the top of the shell of the small cooling tower and discharges the heat of a refrigerant of the evaporative cooling heat exchanger and the tubular immersed condenser to the outdoor atmosphere in a latent heat of vaporization mode; the evaporative cooling heat exchanger and the tubular immersed condenser are connected in series, and the low-power compressor, the evaporative cooling heat exchanger, the tubular immersed condenser, the functional module and the indoor side heat exchanger are connected in sequence and then are connected to the low-power compressor through the gas-liquid separator.

Preferably, the cooling system can further comprise a cooling filler layer positioned below the evaporative cold heat exchanger; the cooling water outside the small cooling tower shell enters the cooling water tank through the water replenishing port, and then flows back to the cooling water tank through the water distributor, the cooling circulating pump, the cooling circulating pipe, the sprayer, the evaporative cooling heat exchanger and the surface of the cooling packing layer.

Further, the low-power compressor is a scroll compressor or a screw compressor which consumes 5-25KW of power and is provided with a flow outlet and a return port; the evaporative cooling heat exchanger and the tubular immersed condenser are connected in series, and the outflow port of the low-power compressor, the evaporative cooling heat exchanger, the tubular immersed condenser, the functional module and the indoor side heat exchanger are connected in sequence and then are connected to the backflow port of the low-power compressor through the gas-liquid separator.

Further, the evaporative cooling heat exchanger is provided with an M, N interface, the tube nest immersion condenser is provided with a S, T interface, the indoor side heat exchanger is provided with a P, Q interface, the functional module is provided with a U, V interface, and the U interface is connected to the V interface sequentially through the liquid storage tank, the drying filter and the expansion valve; the outflow port of the low-power compressor is connected with an M interface of the evaporative cooling heat exchanger, an N interface of the evaporative cooling heat exchanger is connected with an S interface of the tubular immersed condenser, a T interface of the tubular immersed condenser is connected with a V interface of the functional module, a U interface of the functional module is connected with a P interface of the indoor side heat exchanger, and a Q interface of the indoor side heat exchanger is connected with the gas-liquid separator.

Furthermore, the integrated mixed cooling cold water module unit further comprises a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a fourth electromagnetic valve, wherein the inlet end of the first electromagnetic valve is connected with the inlet end of the third electromagnetic valve in parallel and is connected with the outflow port of the low-power compressor; the outlet end of the third electromagnetic valve is connected with the inlet end of the evaporative cooling heat exchanger; the inlet end of the second electromagnetic valve and the inlet end of the fourth electromagnetic valve are connected in parallel and are connected with the outlet end of the evaporative cooling heat exchanger; the outlet end of the first electromagnetic valve and the outlet end of the fourth electromagnetic valve are connected in parallel and then connected with the inlet end of the tube array immersion condenser, and the outlet end of the tube array immersion condenser is connected in parallel with the outlet end of the second electromagnetic valve, then sequentially connected with the liquid storage tank, the drying filter, the expansion valve and the indoor side heat exchanger, and then connected to the backflow port of the low-power compressor through the gas-liquid separator.

Furthermore, the outside of the indoor side heat exchanger is connected with an indoor side refrigerating circulating pump, at the moment, the integrated mixed-cooling cold water module unit is a water cooling unit, and the refrigerated water is conveyed to a refrigerating main machine, namely the indoor side heat exchanger, through the indoor side refrigerating circulating pump to prepare low-temperature water, so that the purpose of cooling the indoor space is achieved.

Further, the indoor side heat exchanger can be replaced by an indoor multi-connected unit, at the moment, the integrated mixed cooling cold water module unit is a water-cooling multi-connected unit (direct expansion unit), the multi-connected indoor unit comprises a refrigerant fin heat exchanger and an indoor side fan, the indoor side fan enables air to flow through the surface of the refrigerant fin heat exchanger, and the air is directly vaporized to absorb indoor air heat to cool through a refrigerant, so that the air-cooling multi-connected unit is used for refrigerating.

Preferably, the small cooling tower shell comprises a top plate, a base, a grid, a front guard plate, a side guard plate and a water-stop plate arranged above the inner part of the guard plate; a drain valve and a drain outlet are arranged at the bottom of the cooling water tank, an overflow port is arranged on the upper side edge of the cooling water tank, and the drain outlet is connected to the lower part of the front guard plate; a water replenishing port and a ball float valve are arranged in the middle of a front protective plate of the small cooling tower shell, external cooling water enters from the water replenishing port, and the ball float valve is switched on and off to automatically replenish water into the cooling water tank when needed; the lower part of the front guard plate of the small cooling tower shell is provided with an external chilled water outlet and a chilled water inlet which are respectively communicated with a chilled water inlet and a chilled water outlet of the indoor side heat exchanger; and a control cabinet is arranged on the lower part of the side surface protection plate of the small cooling tower shell and used for controlling an electrical switch of the integrated mixed cooling cold water module unit.

Preferably, the tubular immersed condenser comprises a refrigerant collecting box, a U-shaped refrigerant tubular, a support, a baffle plate, a refrigerant inlet pipe and a refrigerant outlet pipe, wherein the refrigerant collecting box consists of a bottom cover, a top cover, an upper cavity isolation grid and a lower cavity isolation grid, the length and the width of the bottom cover and the top cover are mutually matched, flange plates with the same size are arranged on the outer sides of the bottom cover and the top cover, a plurality of screw holes with matched size and position are arranged on the flange plates, a plurality of tubular holes are arranged in the middle of the bottom cover, a protruding part in the middle of the top cover is a box-shaped end cover, and the top cover and the bottom cover are screwed and buckled together through the screw holes through bolts to form; the upper and lower cavity isolation grids are vertically fixed in the end cover along the length direction of the bottom cover and the top cover, corresponding upper and lower cavity isolation grooves are formed in the middle of the bottom cover, and the upper and lower cavity isolation grids are inserted into the upper and lower cavity isolation grooves to divide the refrigerant collecting box into a refrigerant upper cavity and a refrigerant lower cavity which are respectively sealed; a collecting tank refrigerant inlet and a collecting tank refrigerant outlet are respectively arranged above the left side and below the right side of the end cover; the refrigerant inlet pipe extends to the middle part of the refrigerant upper cavity through the refrigerant inlet of the collecting box, so that the refrigerant is uniformly distributed in the U-shaped refrigerant array pipe, and the full condensation liquefaction effect is achieved; the refrigerant outlet pipe is connected with a refrigerant outlet of the collecting box positioned at the bottom of the lower cavity of the refrigerant, so that the liquid state of the refrigerant can flow out conveniently, the phenomenon of liquid accumulation is prevented, and the utilization efficiency of the refrigerant is improved; the U-shaped refrigerant array pipes are in a plurality of groups, each group comprises a plurality of U-shaped refrigerant array pipes, each U-shaped refrigerant array pipe comprises two straight pipes which are parallel to each other and have consistent lengths and an arc-shaped pipe connected to the tail end of each straight pipe, and the distance between the two straight pipes of each U-shaped refrigerant array pipe is different and gradually increased; one end of the straight pipe, which is far away from the arc-shaped pipe, is vertically connected with two longitudinally symmetrically arranged tube array holes on the bottom cover through threads, and each group of U-shaped refrigerant tube arrays are positioned in a longitudinal plane and are parallel to planes of the other groups of U-shaped refrigerant tube arrays; the support comprises a pore plate, a support plate and a connecting plate, wherein the pore plate is a plurality of plates arranged in parallel with the bottom cover, the length and width of the pore plate are matched with those of the bottom cover, and the lower end of the pore plate is provided with a fixed upright post; the outer side of the pore plate is provided with an outer edge with the same size as the flange plate of the bottom cover, the middle of the pore plate is provided with a tube array fixing hole with the same size and position as the tube array hole, and the U-shaped refrigerant tube array penetrates through the pore plate; a supporting plate vertically connected with the pore plates is arranged between the pore plates to play a role in supporting and fixing; the connecting plate is arranged between the bottom cover and the nearest pore plate and plays a role in connection and fixation; the baffle plate is a flat plate with an S-shaped side section and comprises an upper section, a lower section, a concave part and a convex part, the concave part and the convex part are in smooth transition to form an S-wave shape, a plurality of baffle plate array tube holes matched with the U-shaped refrigerant array tubes in size and position are uniformly arranged in the middle of the baffle plate, and the baffle plate is coupled with a plurality of groups of U-shaped refrigerant array tubes through the baffle plate array tube holes to form a compact tube plate structure; the cross section of the side surface of the baffle plate is arranged in an S-shaped wave form from top to bottom, so that water in the same temperature layer in the cooling water tank flows vertically downwards, the detention time of the water in the tube array area is prolonged, and the effects of uniform heat exchange and sufficient heat exchange are achieved.

The tube array immersion condenser can be replaced by a second tube array immersion condenser (or called a collecting tube immersion condenser), and comprises a U-shaped refrigerant tube array, a support, a baffle plate, a refrigerant inlet tube, a refrigerant outlet tube, a refrigerant upper collecting tube and a refrigerant lower collecting tube, wherein the support comprises a pore plate and a support plate, the pore plate is a plurality of plates arranged in parallel, and the lower end of the pore plate is provided with a fixed upright post; a tube array fixing hole with the same size and position as the U-shaped refrigerant tube array is formed in the middle of the pore plate, and the U-shaped refrigerant tube array penetrates through the hole plate; a supporting plate vertically connected with the pore plates is arranged between the pore plates to play a role in supporting and fixing; the refrigerant upper collecting pipe and the refrigerant lower collecting pipe are respectively arranged at the upper end and the lower end in front of the foremost pore plate along the length horizontal direction, the left end of the refrigerant upper collecting pipe is communicated with the refrigerant inlet pipe, and the right end of the refrigerant lower collecting pipe is communicated with the refrigerant outlet pipe; the U-shaped refrigerant array pipes are divided into a plurality of groups, each group comprises a plurality of pipes, one end of each U-shaped refrigerant array pipe is led out from a certain position on the refrigerant in the length direction of the header, penetrates through a group of corresponding array pipe fixing holes on a plurality of pore plates, enters the inside of the bracket in a straight pipe form, the tail end of each U-shaped refrigerant array pipe is bent into an arc-shaped pipe, and then penetrates through another group of array pipe fixing holes on the pore plates backwards in another straight pipe form, and the other end after being led out is communicated with a corresponding position on the refrigerant in the length direction of the header; the distance between two sections of straight pipes of each U-shaped refrigerant array pipe is different and gradually increased; each group of U-shaped refrigerant array tubes are positioned in a longitudinal plane and are parallel to the planes of the U-shaped refrigerant array tubes of other groups; the baffle plate is a flat plate with an S-shaped side section and comprises an upper section, a lower section, a concave part and a convex part, the concave part and the convex part are in smooth transition to form an S-wave shape, a plurality of baffle plate array tube holes matched with the U-shaped refrigerant array tubes in size and position are uniformly arranged in the middle of the baffle plate, and the baffle plate is coupled with a plurality of groups of U-shaped refrigerant array tubes through the baffle plate array tube holes to form a compact tube plate structure; the cross section of the side surface of the baffle plate is arranged in an S-shaped wave form from top to bottom, so that water in the same temperature layer in the cooling water tank flows vertically downwards, the detention time of the water in the tube array area is prolonged, and the effects of uniform heat exchange and sufficient heat exchange are achieved. Compared with the tube array immersion type condenser, the second tube array immersion type water-cooled condenser omits a refrigerant collecting box and a connecting plate in the refrigerant collecting box and the bracket, replaces the refrigerant collecting box by the refrigerant upper collecting tube and the refrigerant lower collecting tube, and has the characteristics of simple structure and low manufacturing cost.

The tube array immersion condensers in the two forms can ensure that the refrigerant in the tube and cooling water can fully exchange heat, and simultaneously can also ensure that the refrigerant and the cooling water exchange heat to generate part of latent heat of vaporization to be released through the water surface of the cooling water tank, thereby achieving the effect which cannot be achieved by a shell-and-tube heat exchanger, improving the heat exchange quantity of unit water by using the latent heat of vaporization of the water, and further ensuring that the heat exchange efficiency is higher than that of a shell-and-tube heat exchanger; and the tubular immersed heat exchanger is more convenient to clean and maintain.

Preferably, an H-shaped same-pass multi-stage water distributor is adopted in the cooling water tank and comprises a water distributor header pipe, a multi-stage water distribution pipe and a plurality of water distribution heads which are communicated with each other, each stage of lower water distribution pipe is vertically connected with the upper stage of water distribution pipe to form a multi-stage H shape, the plurality of water distribution heads are distributed at two ends of the last stage of water distribution pipe, and finally, each water distribution head is arranged on the same horizontal plane and each adjacent water distribution head is arranged at equal intervals, so that a uniform water distribution head array is formed; the other end of the water distributor main pipe is communicated with a cooling circulating pump, cooling water heated by heat exchange in the cooling water tank enters the multistage water distribution pipe and the water distributor main pipe through the uniformly distributed water distribution heads, and finally enters the cooling circulating pump through the cooling pump guide pipe and enters the next cooling circulation through the sprayer. The H-shaped same-pass multistage water distributor can enable the low-temperature cooling water cooled on the surface of the cooling water tank to move downwards along the vertical direction on the same horizontal plane, ensure that the low-temperature cooling water exchanges heat with the refrigerant tubes layer by layer downwards, and gradually increase the temperature of the cooling water as the refrigerants in the tubes are cooled. The cooling water after temperature rise can effectively prevent disordered heat exchange between the cooling water and the refrigerant tubes through the arrangement of the H-shaped same-pass multistage water distributor, and ensures that the low-temperature cooling water vertically flows through each layer of tubes in a layered manner on the same horizontal plane, thereby improving the cooling effect of the cooling water and the cooling efficiency of the refrigerant. According to the specific heat capacity of the temperature difference C of the cross section area rho density delta T of the flow velocity VVx S; the cross-sectional area of V velocity of flow S is the definite value, and rho density, C specific heat capacity are the constants, because the cross-sectional area of open cooling water tank is hundreds of times of cooling circulation pipe, lead to cooling water velocity of flow V velocity of flow to reduce, and then cooling water detention water tank time extension.

Has the advantages that: the utility model embeds the refrigeration system into the small modular cooling tower to form an integrated unit with highly integrated refrigeration system and cooling system; the scroll compressor or the low-power screw compressor is adopted, so that the unit is miniaturized, after the unit is miniaturized and modularized, the power consumption is 5-40 KW, the weight of the unit is reduced to be below 0.5 ton, and the unit can be conveniently installed and transported; particularly, a secondary condensation heat exchange mode of efficient evaporation condensation and tube array soaking water-cooling condensation is adopted, so that the heat exchange of a refrigerant is more sufficient, and the unit efficiency is higher; after the refrigeration system and the cooling system are highly integrated, the refrigerant circulating system is arranged in the outdoor cooling tower, so that the traditional indoor machine room is omitted; the integrated unit saves the laying of a cooling pipe network in the traditional water chilling unit engineering, reduces the construction amount and reduces the construction difficulty; the lower lift cooling circulating pump of the built-in cooling water circulating system has lower power, and the high-efficiency evaporative cooling heat exchanger exchanges heat with the tubular immersed condenser through secondary condensation, so that the evaporation capacity of the cooling water is improved, the circulation capacity of the cooling water is reduced, and the power consumption of the cooling circulating pump is further reduced; the refined spraying water distribution and the small-flow cooling water circulation reduce the wind speed of the fan, avoid the phenomena of water flying and water floating to the maximum extent and save water; after optimization through each part, each system the utility model discloses the unit has higher integrated level, low noise, higher comprehensive efficiency. The utility model discloses an integration thoughtlessly cools off cold water (directly expands) module unit, decomposes traditional single high-power cooling water set into many low-power units, satisfies the supply, will change the grade pattern of air conditioner water chilling unit, air cooling unit, forms central air conditioning third pole- -integration water cooling module unit, will certainly provide more choices for engineering practice, and fundamentally has solved the following problem of traditional screw rod cooling water set, centrifugal cooling water set:

1. the volume is large (the weight is several tons), and the installation and the transportation are inconvenient. Because the utility model adopts the scroll compressor or the low-power screw compressor to modularize the large-scale water chilling unit in a small-scale (the power consumption is 5 KW-40 KW), the weight of the single machine is reduced to below 0.5 ton, thereby being convenient for the installation and transportation of the unit.

2. The refrigeration machine room occupies the main building space, so that the building utilization rate is reduced, and the space is wasted. The small modular unit can be installed on a roof and does not need to be specially provided with a machine room, so that the indoor space is saved, and the utilization rate of a main building is improved.

3. The unit is small in equipment number, poor in stability and difficult to maintain. The modularized units run simultaneously to be mutually standby, the maintenance and the repair of individual units do not influence the overall operation and use, and the operation stability of the whole air conditioning system is improved.

4. The height difference between the cooling tower and the refrigeration host and the on-way pipe resistance caused by overlong cooling pipe network are increased, and a high-lift circulating pump is adopted to ensure that the electric energy consumption is high; the heat exchanger adopting the shell-and-tube (sleeve) heat exchanger has larger resistance and high energy consumption of the circulating pump. Obviously, if the cooling tower and the refrigeration main machine are arranged on the same plane, the lift and the on-way resistance are greatly reduced, and the power consumption of the circulating pump is reduced by 50-70%. The existing water chilling unit mostly adopts a shell-and-tube heat exchanger, and the shell pass is short, so that the required flow rate is high, the pressure difference of a fluid inlet and a fluid outlet is large, the fluid resistance is greatly increased, the power of a circulating pump is increased, and the energy consumption is increased. The modularized water chilling unit adopts the shell-and-tube heat exchanger with the open-type condenser, so that the resistance of the shell-and-tube heat exchanger of the traditional water chilling unit can be effectively reduced, and the power of a circulating pump is reduced.

5. The construction amount of the pipe network is increased, the construction cost is high, and the construction difficulty is high. The modular water chilling unit integrates the cooling tower and the main machine into a whole, although the total cost of the main machine can be increased, the manufacturing cost of the single machine can be effectively reduced by the advantages of industrial production and scale, the downstream cost is transferred upstream, namely the cost is preposed, the construction of an engineering company can be facilitated, the construction difficulty is reduced, and the equipment popularization is facilitated.

6. Specially, the general shell and tube heat exchanger of water-cooling unit is changed into the soaking type tube type heat exchanger, not only can the sufficient heat exchange between the refrigerant in the tube and the cooling water be guaranteed, compared with a shell and tube (sleeve) type closed heat exchanger, the spiral tube soaking type heat exchanger increases the heat exchange quantity of vaporization heat, but also can make the refrigerant and the cooling water exchange generate a part of latent heat of vaporization to be released through the water surface of the water tank, thereby the effect that the shell and tube heat exchanger can not reach is reached, the heat exchange quantity of unit mass water is improved by utilizing the latent heat of vaporization of water, and the heat exchange efficiency is higher than that of the shell and tube heat exchanger. Thereby improving the cooling effect and leading the system operation efficiency to be higher.

7. And the soaking type tube array condenser is more convenient to clean and maintain.

8. The noise is large. In civil buildings, a central air conditioner is the largest noise source, and professional and systematic antifouling treatment must be carried out on an air conditioner room to solve noise pollution, so that the construction cost is increased, all-weather professional personnel are required to watch, and the use cost in operation is increased. The modularization installation the utility model discloses behind the product, because the unit is placed at high-rise building roof roofing, only need standardize the installation can, need not to fall the processing of making an uproar very much, and the unit noise is below 65Pb, reaches national standard completely, can fundamentally solve the interior noise pollution problem. And the host computer runs automatically without the need of special person on duty, thus reducing the construction and use cost.

9. The cooling water is wasted seriously. Cooling water consumption source three links: cooling water evaporation consumption, pollution discharge consumption, "water run". Wherein the 'flying water' is of no benefit consumption. The heat transfer process of the refrigerant is directly or indirectly discharged into the atmosphere under the assistance of the fan, the larger the cooling water circulation is, the larger the spraying amount is, the higher the air circulation amount and the air speed are, and the more the spraying water is taken away by the fan, so that waste is caused. Because the utility model discloses the open shell and tube heat exchanger of unit realizes cooling water and refrigerant heat transfer process through evaporation latent heat and convective heat transfer sensible heat mode to effectively reduced the cooling water circulation volume, and then reduced "flying water" phenomenon, and because evaporation latent heat evaporation capacity increase heat transfer volume increases, properly reduce the fan wind speed and can realize the heat completely to the result of discharging in the atmosphere, furthest has solved flying water phenomenon, reaches the water conservation purpose.

10. Particularly, the cooling water tank is internally provided with the H-shaped multi-stage water distributor, so that the cooling water of the cooling water tank can vertically move (piston movement) according to a horizontal homothermal layer formed by different water temperatures, disordered heat exchange of the cooling water is prevented, and the cooling efficiency of the water is improved to the maximum extent.

11. Particularly, the evaporation heat exchanger with higher efficiency is added, so that the evaporation capacity of latent heat of vaporization can be further increased, and the refrigerating efficiency of the unit is higher than that of a water-cooling water chiller through a two-stage (primary evaporation condensation and secondary water condensation) high-efficiency condensation cooling process. And meanwhile, two high-efficiency condensers are adopted to fully utilize the three-dimensional space of the unit, and the modular unit can be more reasonable in structure and minimum in volume through the optimized combination of two heat exchangers.

12. Particularly, the evaporation capacity of latent heat of vaporization of the cooling water is improved by adopting a two-stage efficient condensation mode, so that the cooling efficiency of the cooling water is improved, and the circulation capacity of the cooling water and the service power of a fan can be effectively reduced correspondingly. The reduction of air quantity and air speed is reduced, and the flying water and floating water quantity of the cooling tower are reduced, so that the aim of saving water is fulfilled.

13. And a mixed cooling refrigeration mode, a water cooling refrigeration mode and an evaporation cooling refrigeration mode can be realized. According to the refrigerating capacity requirement, various condensing modes can be adopted, so that the unit can be operated in the optimal working state all the time to achieve the most energy-saving operation.

Drawings

Fig. 1 is a schematic view (without electromagnetic valve) of an embodiment of the integrated mixed cooling cold water module unit of the present invention.

Fig. 2 is a schematic diagram of the second principle of the integrated mixed cooling cold water module unit (including the electromagnetic valve).

Fig. 3 is a flow chart of a mixed cooling refrigeration mode according to the second embodiment of the present invention.

Fig. 4 is a flowchart of a single evaporative cooling mode according to a second embodiment of the present invention.

Fig. 5 is a flowchart of a single water-cooling refrigeration mode according to a second embodiment of the present invention.

Fig. 6 is a schematic diagram of three principles of the integrated mixed cooling cold water module unit (multi-connected unit, containing electromagnetic valve).

Fig. 7 is a schematic side sectional structure view of the second embodiment of the integrated mixed cooling and cooling water module unit of the present invention.

Fig. 8 is a schematic side view of a third embodiment (multi-connected unit) of the integrated mixed cooling cold water module unit of the present invention.

Fig. 9 is a schematic front sectional structural view of a first embodiment or a second embodiment of the integrated mixed cooling and cooling module unit of the present invention.

Fig. 10 is a schematic top view of the integrated mixed cooling cold water module unit according to the first embodiment or the second embodiment of the present invention.

Fig. 11 is a schematic top view sectional structure view of the first embodiment or the second embodiment of the integrated mixed cooling cold water module unit of the present invention.

Fig. 12 is an integrally assembled side view of the tube row immersion condenser of the present invention.

Fig. 13 is an assembled side view of the tube array immersion condenser of the present invention (tubes and baffles not shown).

Fig. 14 is an assembled top view of the tube array immersion condenser of the present invention (tubes and baffles not shown).

Fig. 15 is a front view of the perforated plate of the shell and tube condenser of the present invention.

Fig. 16 is a front view of the bottom cover of the shell and tube condenser of the present invention.

Fig. 17 is a front view of the top cover of the shell and tube submerged condenser of the present invention.

Fig. 18 is a sectional inside view of the top cover of the shell and tube condenser of the present invention.

Fig. 19 is a plan view of the top cover of the shell and tube condenser of the present invention.

Fig. 20 is a side view of the top cover of the shell and tube submerged condenser of the present invention.

Fig. 21 is a side sectional view of the top cover of the shell and tube condenser of the present invention.

Fig. 22 is a front view of a second shell and tube submerged condenser (header shell and tube submerged condenser) according to the present invention.

Fig. 23 is a side view of a second shell and tube submerged condenser (header shell and tube submerged condenser) in the utility model (the shell and tube and the baffle plate on the back surface of the orifice plate are not shown).

Fig. 24 is a partial front view of a baffle plate in the present invention.

Fig. 25 is a side view of a baffle plate in the present invention.

Fig. 26 is a partial top view of a baffle plate in the present invention.

Fig. 27 is a schematic view of the structure of the H-shaped multi-stage water distributor in the present invention.

Wherein: r1, low power compressor; 11. an outflow port; 12. a return port; r2, evaporative cold heat exchanger; 21. evaporating the refrigerant gas header; 22. evaporating the refrigerant liquid header; r3, a tube nest immersion condenser; 30. a refrigerant collecting box; 31. a water-cooled refrigerant gas header; 32. a water-cooled refrigerant liquid header; 33. a support; 34. a U-shaped refrigerant array pipe; 35. a baffling pipe; 30a, a bottom cover; 30b, a top cover; 30c, upper and lower cavity isolation gates; 30d, upper and lower cavity isolation grooves; 300. a flange plate; 301. a screw hole; 302. u-shaped refrigerant array tube holes; 303. an end cap; 304. a refrigerant upper cavity; 305. a refrigerant lower cavity; 306. a refrigerant inlet; 307. a refrigerant outlet; 330. an orifice plate; 331. a support plate; 332. a connecting plate; 3301. fixing the upright post; 3302. outside; 3303. tube array fixing holes; 35. a baffle plate; r4, a liquid storage tank; r5, dry filter; r6, expansion valve; r7, indoor side heat exchanger; r71, indoor side refrigeration circulation pump; r7a, indoor multi-connected units; r8, a gas-liquid separator; f1, a first electromagnetic valve; f2, a second electromagnetic valve; f3, a third electromagnetic valve; f4, a fourth electromagnetic valve; c1, cooling circulation pump; c2, a sprayer; c3, a water distributor; c4, a fan; c5, small cooling tower shell; c6, a cooling water tank; c7, cooling the filler layer; 51. a top plate; 52. a base; 53. a grid; 54. a front guard plate; 55. a side guard plate; 56. a water-stop sheet; 57. a control cabinet; 61. a blowoff valve; 62. a sewage draining outlet; 61. a blowoff valve; 62. a sewage draining outlet; 63. an overflow port; 541. a water replenishing port; 542. a float valve; 543. a chilled water outlet; 544. a chilled water inlet; c300, a water distributor main pipe; c301, a first-stage water distribution pipe; c302, secondary water distribution pipes; c303, a three-level water distribution pipe; c304, a four-stage water diversion pipe; c305, a five-stage water distribution pipe; c306, a six-stage water pipe; c307, a water distribution head.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1, the utility model discloses a principle schematic diagram (water chiller, does not contain the solenoid valve) of cold water module unit embodiment is thoughtlessly cooled in integration:

an integrated mixed cooling cold water module unit comprises a cooling system and a refrigerant circulating system which are integrated into a whole, wherein the cooling system comprises a small cooling tower shell C5, a fan C4, a water distributor C3, a cooling circulating pump C1, a sprayer C2 and a cooling water tank C6, and the refrigerant circulating system comprises a low-power compressor R1, an evaporative cooling heat exchanger R2, a tube array immersion type condenser R3, a liquid storage tank R4, a drying filter R5, an expansion valve R6, an indoor side heat exchanger R7 and a gas-liquid separator R8; the evaporative cooling heat exchanger R2 and the tube array immersion type condenser R3 are connected in series, and the low-power compressor R1, the evaporative cooling heat exchanger R2, the tube array immersion type condenser R3, the liquid storage tank R4, the drying filter R5, the expansion valve R6 and the indoor side heat exchanger R7 are sequentially connected and then are connected to the low-power compressor R1 through the gas-liquid separator R8; the cooling system may also include a layer of cooling filler C7 located below the evaporative cold heat exchanger R2; cooling water outside the shell C5 of the small cooling tower enters a cooling water tank C6 through a water replenishing port, and flows back to the cooling water tank C6 through the surfaces of a water distributor C3, a cooling circulating pump C1, a cooling circulating pipe, a sprayer C2, an evaporative cooling heat exchanger R2 and a cooling filler layer C7.

The low-power compressor R1 is a scroll compressor or a screw compressor with 5-25KW power consumption, and is provided with a flow outlet 11 and a return port 12; the evaporative cooling heat exchanger R2 and the tube array immersion type condenser R3 are connected in series, and after the outflow port of the low-power compressor R1, the evaporative cooling heat exchanger R2, the tube array immersion type condenser R3, the liquid storage tank R4, the drying filter R5, the expansion valve R6 and the indoor side heat exchanger R7 are connected in sequence, the return port of the low-power compressor R1 is connected through the gas-liquid separator R8.

The evaporative cooling heat exchanger R2 is provided with a M, N interface, the tube nest immersion condenser R3 is provided with a S, T interface, the indoor side heat exchanger R7 is provided with a P, Q interface, the functional module is provided with a U, V interface, and the U interface is connected to the V interface through a liquid storage tank R4, a drying filter R5 and an expansion valve R6 in sequence; an outflow port of the low-power compressor R1 is connected with an M interface of the evaporative cooling heat exchanger R2, an N interface of the evaporative cooling heat exchanger R2 is connected with an S interface of the tube row immersion type condenser R3, a T interface of the tube row immersion type condenser R3 is connected with a V interface of the functional module, a U interface of the functional module is connected with a P interface of the indoor side heat exchanger R7, and a Q interface of the indoor side heat exchanger R7 is connected with the gas-liquid separator R8.

The low-power compressor R1 is a scroll compressor or a screw compressor which consumes 5-25KW of power.

The outside of the indoor side heat exchanger 7R is connected with an indoor side refrigeration circulating pump 71R, and at this time, the integrated mixed cooling cold water module unit is a water cooling unit, which is the case in the first embodiment; the chilled water is delivered to the refrigeration main machine (the indoor heat exchanger 7R) through the indoor side refrigeration circulating pump 71R to prepare low-temperature water, so that the purpose of cooling the indoor space is achieved.

As shown in fig. 2, in the second embodiment, the integrated mixed cooling cold water module unit further includes a first solenoid valve F1, a second solenoid valve F2, a third solenoid valve F3, and a fourth solenoid valve F4, wherein an inlet end of the first solenoid valve F1 is connected in parallel with an inlet end of the third solenoid valve F3, and is connected to an outflow port of a low-power compressor R1; the outlet end of the third electromagnetic valve F3 is connected with the inlet end of an evaporative cooling heat exchanger R2; the inlet end of the second electromagnetic valve F2 and the inlet end of the fourth electromagnetic valve F4 are connected in parallel and are connected with the outlet end of the evaporative cooling heat exchanger R2; the outlet end of the first electromagnetic valve F1 and the outlet end of the fourth electromagnetic valve F4 are connected in parallel and then connected with the inlet end of a tube array immersion condenser R3, the outlet end of the tube array immersion condenser R3 is connected in parallel with the outlet end of the second electromagnetic valve F2, and then connected with a liquid storage tank R4, a drying filter R5, an expansion valve R6 and an indoor side heat exchanger R7 in sequence and then connected with the return port of a low-power compressor R1 through a gas-liquid separator R8.

Fig. 3 is a flow chart of the second mixed cooling refrigeration mode according to the embodiment of the present invention.

In the mode, the first solenoid valve F1 and the second solenoid valve F2 are closed; the third solenoid valve F3 and the fourth solenoid valve F4 are opened.

The cooling circulating pump C1 is started, the fan C4 is started, external cooling water enters from the water replenishing port 541, and water is automatically replenished into the cooling water tank C6 when needed through the switch of the float valve 542; then flows back to the cooling water tank C6 through the surface of a water distributor C3, a cooling circulating pump C1, a cooling circulating pipe, a sprayer C2 and an evaporative cooling heat exchanger R2. The detailed process of cooling water circulation is as follows: circulating water with higher temperature is conveyed to a sprayer C2 through a cooling pipeline under the action of a cooling circulating pump C1, cooling water with higher temperature is uniformly sprayed on the surface of an evaporative cooling heat exchanger R2 arranged below the sprayer through all spray heads which are uniformly distributed in the sprayer C2, the cooling water forms a water film on the surface of the evaporative cooling heat exchanger R2, the cooling water can be quickly vaporized and evaporated due to the surface temperature of the evaporative cooling heat exchanger R2 being about 90 ℃, so that a large amount of refrigerant heat can be directly taken away, the unvaporized cooling water and the cold evaporative cooling heat exchanger R2 carry out convective heat exchange and rise temperature and then drip onto the upper part of a cooling filler layer C7 below, the cooling circulating water forms a thin water film from top to bottom under the action of gravity along the surface of the cooling filler layer C7, and the water vapor on the surface is atomized due to the fact that the temperature of the water film is higher than the ambient temperature, and the atomized water vapor is discharged under the action of a fan C4, the heat in the cooling water is transferred to the atmosphere in the form of latent heat. The unvaporized water and the cooling filler layer C7 carry out heat convection and heat radiation, the circulating water is cooled and cooled gradually from top to bottom, and finally all heat is discharged to the atmosphere through the fan C4. The circulating water with lower temperature after temperature reduction uniformly drops to the upper surface of the cooling water tank C6 along the bottom surface of the cooling filler layer C7, and the cooling filler layer C7 plays a role in cooling and water distribution in the process. The cooling water with lower temperature forms a downward movement traction force under the action of self gravity flow and a cooling circulating pump C1, and the whole water layer is in a piston-like moving state with a vertical downward plane due to the existence of the water distributor C3, so that the cooling water is ensured to be in gradient temperature rise heat exchange from top to bottom, the occurrence of uneven and insufficient cooling water heat exchange caused by disordered heat exchange is avoided, and the heat exchange efficiency of the cooling water is ensured.

The refrigerant system circulation process is as follows: the low-power compressor R1 is electrified to work, high-temperature and high-pressure gaseous refrigerant is injected from the outflow port 11 of the low-power compressor, the high-temperature and high-pressure gaseous refrigerant passes through the third electromagnetic valve F3 and enters the evaporative cold refrigerant gaseous header 21 from the inlet end of the evaporative cold heat exchanger R2, refrigerant steam is subjected to heat exchange and cooling with cooling water on the surface of the evaporative cold heat exchanger R2, the refrigerant steam is preliminarily cooled and liquefied, the cooling water is subjected to heat exchange with the refrigerant steam in the evaporative cold heat exchanger R2 and then is gasified and evaporated, part of the cooling water is changed from a liquid state to a vapor state, and the heat of the refrigerant is discharged to the outdoor atmosphere through; the high-temperature high-pressure refrigerant which is primarily condensed and liquefied flows out from the evaporative cooling refrigerant liquid header 22 of the evaporative cooling heat exchanger R2 through the outlet end (see the attached drawing 11), enters the tubular immersed condenser R3 through the fourth electromagnetic valve F4 (the specific structure and the principle are described in detail later), high-temperature high-pressure refrigerant steam and cooling water in a cooling water tank outside the tubular immersed condenser R3 perform secondary heat exchange and temperature reduction, part of the refrigerant heat is transferred to the cooling water through the refrigerant tubular heat exchanger, the other part of the refrigerant heat is vaporized through the cooling water and then is discharged into the outdoor atmosphere through the fan C4, the refrigerant which is condensed twice is changed into high-pressure low-temperature liquid refrigerant, the high-pressure low-temperature liquid refrigerant flows out through the outlet end of the tubular immersed condenser R3, the refrigerant flows out through the liquid storage tank R4, the drying filters R5 and 493R 6 are throttled, the refrigerant is changed into low-temperature low-pressure liquid state and then enters the indoor side heat exchanger R7, indoor side circulating water (the indoor side For the use of the air conditioner terminal. At this time, the low-temperature and low-pressure liquid refrigerant exchanges heat with indoor circulating water (secondary refrigerant) flowing through the other side of the indoor heat exchanger R7 at the same time, the liquid refrigerant absorbs heat, vaporizes and evaporates into refrigerant vapor, flows through the outlet end of the indoor heat exchanger R7, passes through the gas-liquid separator R8, is refluxed and compressed through the return port 12 of the low-power compressor R1, and then enters the next cycle.

When the first solenoid valve F1 and the fourth solenoid valve F4 are closed and the second solenoid valve F2 and the third solenoid valve F3 are opened, the refrigerant flows through the evaporative cooling heat exchanger R2 to realize the single evaporative condensation heat exchange mode refrigeration, as shown in fig. 4, which is a flow chart of the single evaporative cooling mode.

When the first solenoid valve F1 is opened and the third solenoid valve F3, the second solenoid valve F2 and the fourth solenoid valve F4 are closed, the refrigerant flows through the tube array immersion condenser R3 to realize the single water condensation heat exchange mode refrigeration, as shown in fig. 5, which is a flow chart of the single water cooling refrigeration mode.

In a third embodiment, as shown in fig. 6, the indoor side heat exchanger 7R is replaced by an indoor multi-connected unit 7Ra, at this time, the integrated mixed cooling and water cooling module unit is a water-cooling multi-connected unit (direct expansion unit), the multi-connected indoor unit 7Ra includes a refrigerant fin heat exchanger and an indoor side fan, the indoor side fan makes air flow through the surface of the refrigerant fin heat exchanger, and the refrigerant is directly vaporized to absorb heat of the indoor air to cool the indoor air, so that the indoor side fan is used for cooling the water-cooling multi-connected unit. At the moment, low-temperature and low-pressure liquid refrigerant enters each refrigerant fin heat exchanger, exchanges heat with indoor air flowing through the surface of each refrigerant fin heat exchanger simultaneously under the action of each indoor fan, the liquid refrigerant absorbs air heat to be vaporized and evaporated into refrigerant steam, the indoor air is frozen and cooled, the vaporized and heated refrigerant low-temperature and low-pressure refrigerant steam flows through the outlet end of the indoor multi-connected unit 7Ra, flows through a gas-liquid separator R8 and then flows back to the low-power compressor R1 to be compressed, and then enters the next cycle.

Further, as shown in fig. 7-11, the structure of the integrated mixed cooling and cooling module set of the present invention is schematically illustrated:

the small cooling tower shell C5 comprises a top plate 51, a base 52, a grid 53, a front guard plate 54, a side guard plate 55 and a water stop plate 56 arranged above the inner part of the guard plate; a drain valve 61 and a drain outlet 62 are arranged at the bottom of the cooling water tank C6, an overflow port 63 is arranged at the upper side of the cooling water tank C6, and the drain outlet 62 is connected to the lower part of the front guard plate 54; the middle part of the front protective plate 54 of the small cooling tower shell C5 is provided with a water replenishing port 541 and a float valve 542, and water is automatically replenished into the cooling water tank C6 through the switch of the float valve 542; the lower part of the front guard plate 54 of the small cooling tower shell C5 is provided with an external chilled water outlet 543 and a chilled water inlet 544 which are respectively communicated with the chilled water inlet and outlet of the indoor side heat exchanger R7; and a control cabinet 57 is arranged at the lower part of the side protective plate 55 of the small cooling tower shell C5 and is used for controlling an electrical switch of the integrated mixed cooling cold water module unit.

The cooling water tank C6 is arranged at the upper part inside the small cooling tower shell C5, and the low-power compressor R1, the liquid storage tank R4, the drying filter R5, the expansion valve R6 and the indoor side heat exchanger R7 are arranged at the lower part inside the small cooling tower shell C5; the evaporative cooling heat exchanger R2 is arranged above the cooling water in the cooling water tank C6, and the tubular immersed condenser R3 is immersed in the cooling water tank C6; the water distributor C3 is arranged at the bottom inside the cooling water tank, cooling water outside the small cooling tower shell C5 enters from a water replenishing port, and water is automatically replenished into the cooling water tank when needed through a float valve switch; then the water flows back to a cooling water tank C6 through the water distributor C3, a cooling circulating pump C1, a cooling circulating pipe, a sprayer C2 and the surface of an evaporative cooling heat exchanger R2; the sprayer C2 is arranged above the evaporative cooling heat exchanger R2 and is used for spraying water to the surface of the evaporative cooling heat exchanger R2 and absorbing heat; the fan C4 is arranged on the top of the small cooling tower shell C5 and discharges the heat of the refrigerant of the evaporative cooling heat exchanger R2 and the tube array immersion condenser R3 to the outdoor atmosphere in a vaporization latent heat mode.

Preferably, the shell and tube submerged condenser R3 is as shown in fig. 12-21:

the tubular immersed condenser R3 comprises a refrigerant collecting box 30, U-shaped refrigerant tubular arrays 34, a support 33, a baffle plate 35, a refrigerant inlet pipe 31 and a refrigerant outlet pipe 32, wherein the refrigerant collecting box 30 consists of a bottom cover 30a, a top cover 30b, an upper cavity isolation grid and a lower cavity isolation grid 30c, the length and width of the bottom cover 30a and the top cover 30b are mutually matched, flange plates 300 with the same size are arranged on the outer sides of the bottom cover 30a and the top cover 30b, a plurality of screw holes 301 with matched size and position are arranged on the flange plates 300, a plurality of tubular holes 302 are arranged in the middle of the bottom cover 30a, the middle protruding part of the top cover 30b is a box-shaped end cover 303, and the top cover 30b and the bottom cover 30a penetrate through the screw holes 301 through bolts so as to be; the upper and lower cavity isolation grids 30c are vertically fixed inside the end cover 303 along the length direction of the bottom cover 30a and the top cover 30b, corresponding upper and lower cavity isolation grooves 30d are formed in the middle of the bottom cover 30a, the upper and lower cavity isolation grids 30c are inserted into the upper and lower cavity isolation grooves 30d, and the refrigerant collecting box 30 is divided into a refrigerant upper cavity 304 and a refrigerant lower cavity 305 which are respectively closed; a collecting tank refrigerant inlet 306 and a collecting tank refrigerant outlet 307 are respectively arranged above the left side and below the right side of the end cover 303; the refrigerant inlet pipe 31 extends to the middle of the refrigerant upper cavity 304 through the refrigerant inlet 306 of the collecting box, so that the refrigerant is uniformly distributed in the U-shaped refrigerant array pipe 34, and the full condensation and liquefaction effects are achieved; the refrigerant outlet pipe 32 is connected with a refrigerant outlet 307 of the collecting tank at the bottom of the refrigerant lower cavity 305, so that the liquid state of the refrigerant can flow out conveniently, the phenomenon of liquid accumulation is prevented, and the utilization efficiency of the refrigerant is improved; the U-shaped refrigerant array pipes 34 are in a plurality of groups, each group comprises a plurality of U-shaped refrigerant array pipes, each U-shaped refrigerant array pipe comprises two sections of straight pipes 341 which are parallel to each other and have the same length and one section of arc-shaped pipe 342 connected to the tail end of each straight pipe, and the distance between the two sections of straight pipes 341 of each U-shaped refrigerant array pipe is different and gradually increased; one end of the two straight pipes 341 far away from the arc pipe 342 is vertically connected with the two longitudinally symmetrically arranged tube array holes 302 on the bottom cover 30a through threads, and each group of U-shaped refrigerant tube arrays 34 is positioned in a longitudinal plane and is parallel to the planes of the U-shaped refrigerant tube arrays 34 of other groups; the bracket 33 comprises a pore plate 330, a support plate 331 and a connecting plate 332, wherein the pore plate 330 is a plurality of plates arranged in parallel with the bottom cover 30a, the length and width of the pore plate 330 are matched with those of the bottom cover 30a, and the lower end of the pore plate is provided with a fixed upright 3301; the outer side of the pore plate 330 is provided with an outer edge 3302 with the same size as the flange plate 300 of the bottom cover 30a, the middle is provided with a tube array fixing hole 3303 with the same size and position as the tube array hole 302, and the U-shaped refrigerant tube array 34 penetrates through the hole; a supporting plate 331 vertically connected with each pore plate 330 is arranged between the pore plates 330 to play a role in supporting and fixing; the connecting plate 332 is disposed between the bottom cover 30a and the nearest hole plate 330, and is used for connecting and fixing.

As shown in fig. 24 to 26, the baffle 35 is a flat plate with an S-shaped side cross section, and includes an upper cross section 3501, a lower cross section 3502, a concave portion 3503, and a convex portion 3504, the concave portion 3503 and the convex portion 3504 of the flat plate smoothly transition to form an S-wave shape, and a plurality of baffle row tube holes 3505 whose size and position are matched with the U-shaped refrigerant row tubes 34 are uniformly arranged in the middle of the flat plate, and the baffle 35 is coupled with a plurality of groups of U-shaped refrigerant row tubes 34 through the baffle row tube holes 3505 to form a compact tube plate structure; the cross section of the side surface of the baffle plate 35 is arranged in an S-shaped wave shape from top to bottom, so that water in the same temperature layer in the cooling water tank C6 vertically flows downwards, the detention time of the water in the tube array area is prolonged, and the effects of uniform heat exchange and sufficient heat exchange are achieved.

As shown in fig. 22-23, the tubular immersed condenser R3 may be replaced by a second tubular immersed condenser R3a (or called a collecting tubular immersed condenser), which includes a U-shaped refrigerant tubular column 34, a bracket 33, a baffle 35, a refrigerant inlet tube 31, a refrigerant outlet tube 32, a refrigerant upper collecting tube 31a, and a refrigerant lower collecting tube 32a, wherein the bracket 33 includes a perforated plate 330 and a supporting plate 331, the perforated plate 330 is a plurality of plates arranged in parallel, and a fixed upright post 3301 is provided at the lower end thereof; a tube array fixing hole 3303 with the same size and position as the U-shaped refrigerant tube array 34 is formed in the middle of the pore plate 330, and the U-shaped refrigerant tube array 34 penetrates through the hole; a supporting plate 331 vertically connected with each pore plate 330 is arranged between the pore plates 330 to play a role in supporting and fixing; the refrigerant upper header 31a and the refrigerant lower header 32a are respectively arranged at the upper and lower ends in front of the foremost pore plate 330 along the length horizontal direction, the left end of the refrigerant upper header 31a is communicated with the refrigerant inlet pipe 31, and the right end of the refrigerant lower header 32a is communicated with the refrigerant outlet pipe 32; the U-shaped refrigerant array pipes 34 are in a plurality of groups, each group comprises a plurality of pipes, one end of each U-shaped refrigerant array pipe 34 is led out from a certain position in the length direction of the refrigerant upper header 31a, penetrates through a group of corresponding array pipe fixing holes 3303 on the pore plates 300, enters the support 33 in a straight pipe 341 mode, the tail end of the U-shaped refrigerant array pipe is bent into an arc-shaped pipe 342, penetrates through another group of array pipe fixing holes 3303 on the pore plates 300 backwards in another straight pipe 341 mode, and the other end after being led out is communicated with a corresponding position in the length direction of the refrigerant lower header 32 a; the distance between the two straight pipes 341 of each U-shaped refrigerant array pipe 34 is different and gradually increased; each group of U-shaped refrigerant tubes 34 is positioned in a longitudinal plane and is parallel to the planes of the U-shaped refrigerant tubes 34 of other groups; the baffle 35 is a flat plate with an S-shaped side cross section, and comprises an upper cross section 3501, a lower cross section 3502, a concave part 3503 and a convex part 3504, the concave part 3503 and the convex part 3504 of the flat plate are in smooth transition to form an S-wave shape, a plurality of baffle row tube holes 3505 with the size and the position matched with the U-shaped refrigerant row tubes 34 are uniformly arranged in the middle of the S-wave shape, and the baffle 35 is coupled with a plurality of groups of U-shaped refrigerant row tubes 34 through the baffle row tube holes 3505 to form a compact tube plate structure; the cross section of the side surface of the baffle plate 35 is arranged in an S-shaped wave shape from top to bottom, so that water in the same temperature layer in the cooling water tank C6 vertically flows downwards, the detention time of the water in the tube array area is prolonged, and the effects of uniform heat exchange and sufficient heat exchange are achieved. Compared with the tube array immersion condenser R3, the second tube array immersion condenser R3a omits the refrigerant collecting tank 30 and the connecting plate 332 in the refrigerant collecting tank 30 and the bracket 33, and replaces the refrigerant collecting tank 30 with the refrigerant upper collecting pipe 31a and the refrigerant lower collecting pipe 32a, and has the characteristics of simple structure and low manufacturing cost.

The baffle plate 35 can be made of metal material or nonmetal material; the bracket 33 and the refrigerant header box 30 are welded by carbon steel and then are subjected to hot galvanizing, so that the aim of preventing and delaying oxidation in a high-temperature and high-humidity environment is fulfilled.

The U-shaped refrigerant array pipe 34 is made of an internal thread copper pipe with a pipe wall of 8-15 mu m and a diameter of 10-15mm or other metal materials such as titanium alloy, aluminum alloy, stainless steel and the like; the two straight tubes 341 are horizontally arranged in parallel, and the distance between the two straight tubes is 2Cm or more, so that the cleaning is convenient.

The bottom cover is made of a carbon steel plate with the thickness of 15mm or more, the bottom cover is punched by a machine tool according to the diameter of the U-shaped refrigerant array pipe 34 and then welded with the bracket 33, the whole body is subjected to anti-corrosion coating treatment by a hot galvanizing process, and drilled holes are uniformly distributed up, down, left and right; an anti-leakage cushion layer is attached between the flange plates 300 of the bottom cover 30a and the top cover 30b and is fastened through bolts; the upper and lower cavity grids 30c are inserted into the upper and lower cavity grid grooves 30d of the bottom cover 30a, and an anti-leakage elastic rubber strip is attached in the grooves to prevent the refrigerant of the upper refrigerant cavity 304 and the lower refrigerant cavity 305 from mutually permeating.

The pore plate is made of a carbon steel plate with the thickness of 10mm or more, and is punched by a machine tool according to the diameter of the U-shaped refrigerant array pipe 34, and then is welded with the bracket 33, and then is subjected to hot galvanizing to be subjected to anticorrosion coating treatment.

The bolts 308 are made of carbon steel hot-dip galvanized bolts with the diameter of 8mm or more.

As shown in fig. 27, the water distributor C3 is an H-shaped same-pass multi-stage water distributor, which can be made of galvanized steel pipes, PUC pipes, PE and other metal pipes, plastic pipes, etc., and includes a water distributor header pipe C300, a multi-stage water distributor and a plurality of water distributors C307 that are connected with each other, wherein each lower stage water distributor is vertically connected with the upper stage water distributor to form a multi-stage H shape, and the plurality of water distributors are distributed at two ends of the last stage water distributor, so that each water distributor C307 is finally realized to be on the same horizontal plane, and each adjacent water distributors C307 are arranged at equal intervals, thereby forming an even water distributor array; the other end of the water distributor main pipe C300 is communicated with a cooling circulating pump C1, cooling water subjected to heat exchange and temperature rise in the cooling water tank C6 passes through the uniformly distributed water distribution heads C307, enters the multistage water distribution pipe and the water distributor main pipe C300, and finally enters the cooling circulating pump C1 and the sprayer C2 through the cooling pump guide pipe to enter the next cooling circulation.

In this embodiment, the H-shaped multi-stage water distributor is a 6-stage water distributor, and as shown in fig. 14, includes a water distributor header pipe C300, a first-stage water distribution pipe C301, a second-stage water distribution pipe C302, a third-stage water distribution pipe C303, a fourth-stage water distribution pipe C304, a fifth-stage water distribution pipe C305, a sixth-stage water distribution pipe C306, and a plurality of water distribution heads 307.

The H-shaped same-pass multistage water distributor can enable the low-temperature cooling water cooled on the surface of the cooling water tank to move downwards along the vertical direction on the same horizontal plane, ensure that the low-temperature cooling water exchanges heat with the refrigerant tubes layer by layer downwards, and gradually increase the temperature of the cooling water as the refrigerants in the tubes are cooled. The cooling water after temperature rise can effectively prevent disordered heat exchange between the cooling water and the refrigerant tubes through the arrangement of the H-shaped same-pass multistage water distributor, and ensures that the low-temperature cooling water vertically flows through each layer of tubes in a layered manner on the same horizontal plane, thereby improving the cooling effect of the cooling water and the cooling efficiency of the refrigerant. According to the specific heat capacity of the temperature difference C of the cross section area rho density delta T of the flow velocity VVx S; the cross-sectional area of V velocity of flow S is the definite value, and rho density, C specific heat capacity are the constants, because the cross-sectional area of open cooling water tank is hundreds of times of cooling circulation pipe, lead to cooling water velocity of flow V velocity of flow to reduce, and then cooling water detention water tank time extension.

The tube array immersion type heat exchanger in the form can ensure that the refrigerant in the U-shaped refrigerant tube array can fully exchange heat with the cooling water in the cooling water tank, and can also ensure that the refrigerant exchanges heat with the cooling water to generate partial latent heat of vaporization to be released through the water surface of the cooling water tank, thereby achieving the effect which cannot be achieved by a shell-and-tube (sleeve) type heat exchanger, improving the heat exchange quantity of unit water by using the latent heat of vaporization of the water, and ensuring that the heat exchange efficiency is higher than that of a shell-and-tube (sleeve) type heat exchanger; and the tubular immersed heat exchanger is more convenient to clean and maintain.

Although the embodiments of the present invention have been described in the specification, these embodiments are only for the purpose of presentation and should not be construed as limiting the scope of the present invention. Various omissions, substitutions, and changes may be made without departing from the spirit and scope of the invention.

Claims

1. The integrated mixed cooling cold water module unit is characterized by comprising a small cooling tower shell, and a cooling system, a refrigerant circulating system and a functional module which are integrated in the small cooling tower shell; the cooling system comprises a fan, a water distributor, a cooling circulating pump, a sprayer and a cooling water tank, and the refrigerant circulating system comprises a low-power compressor, an evaporative cooling heat exchanger, a tubular immersion condenser, an indoor side heat exchanger and a gas-liquid separator; the functional module comprises a liquid storage tank, a drying filter and an expansion valve which are connected in sequence; the small-power compressor, the liquid storage tank, the drying filter, the expansion valve and the indoor side heat exchanger are arranged at the lower part of the interior of the small cooling tower shell; the evaporative cooling heat exchanger is arranged above the cooling water of the cooling water tank, and the tube array immersion condenser is immersed in the cooling water of the cooling water tank; the water distributor is arranged at the bottom inside the cooling water tank; the sprayer is arranged above the evaporative cooling heat exchanger; the fan is arranged at the top of the small cooling tower shell; the evaporative cooling heat exchanger and the tubular immersed condenser are connected in series, and the low-power compressor, the evaporative cooling heat exchanger, the tubular immersed condenser, the functional module and the indoor side heat exchanger are connected in sequence and then are connected to the low-power compressor through the gas-liquid separator.

2. The integrated mixed cooling chilled water module unit of claim 1, wherein the cooling system further comprises a layer of cooling packing below the evaporative cooling heat exchanger.

3. The integrated mixed cooling cold water module unit as claimed in claim 1 or 2, wherein the low power compressor is a scroll compressor or a screw compressor consuming 5-25KW of power and has an outlet and a return.

4. The integrated mixed cooling cold water module unit of claim 3, further comprising a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid valve, wherein an inlet end of the first solenoid valve is connected in parallel with an inlet end of the third solenoid valve and is connected with an outlet of the low-power compressor; the outlet end of the third electromagnetic valve is connected with the inlet end of the evaporative cooling heat exchanger; the inlet end of the second electromagnetic valve and the inlet end of the fourth electromagnetic valve are connected in parallel and are connected with the outlet end of the evaporative cooling heat exchanger; the outlet end of the first electromagnetic valve and the outlet end of the fourth electromagnetic valve are connected in parallel and then connected with the inlet end of the tube array immersion condenser, and the outlet end of the tube array immersion condenser is connected in parallel with the outlet end of the second electromagnetic valve, then sequentially connected with the liquid storage tank, the drying filter, the expansion valve and the indoor side heat exchanger, and then connected to the backflow port of the low-power compressor through the gas-liquid separator.

5. The integrated mixed cooling cold water module unit as claimed in claim 4, wherein the indoor side heat exchanger is externally connected with an indoor side refrigeration circulating pump, and in this case, the integrated mixed cooling cold water module unit is a water cooling unit.

6. The integrated mixed cooling cold water module unit as claimed in claim 4, wherein the indoor side heat exchanger is replaced by an indoor multi-connected unit, and at this time, the integrated mixed cooling cold water module unit is a water-cooling multi-connected unit.

7. The integrated mixed cooling cold water module unit of claim 4, wherein the small cooling tower shell comprises a top plate, a base, a grating, a front guard plate, a side guard plate and a water-stop plate arranged above the inner part of the guard plate; a drain valve and a drain outlet are arranged at the bottom of the cooling water tank, an overflow port is arranged on the upper side edge of the cooling water tank, and the drain outlet is connected to the lower part of the front guard plate; a water replenishing port and a ball float valve are arranged in the middle of a front protective plate of the small cooling tower shell, external cooling water enters from the water replenishing port, and the ball float valve is switched on and off to automatically replenish water into the cooling water tank when needed; the lower part of the front guard plate of the small cooling tower shell is provided with an external chilled water outlet and a chilled water inlet which are respectively communicated with a chilled water inlet and a chilled water outlet of the indoor side heat exchanger; and a control cabinet is arranged on the lower part of the side surface protection plate of the small cooling tower shell and used for controlling an electrical switch of the integrated mixed cooling cold water module unit.

8. The integrated mixed cooling cold water module unit as claimed in claim 4, wherein the tube array immersion condenser comprises a refrigerant collecting box, a U-shaped refrigerant array tube, a support, a baffle plate, a refrigerant inlet tube and a refrigerant outlet tube, the refrigerant collecting box comprises a bottom cover, a top cover, an upper cavity isolation grid and a lower cavity isolation grid, the length and the width of the bottom cover and the top cover are matched with each other, flange plates with the same size are arranged on the outer sides of the bottom cover and the top cover, a plurality of screw holes with matched size and position are arranged on the flange plates, a plurality of tube holes are arranged in the middle of the bottom cover, a protruding part in the middle of the top cover is a box-shaped end cover, and the top cover and the bottom cover are screwed and fastened together by passing; the upper and lower cavity isolation grids are vertically fixed in the end cover along the length direction of the bottom cover and the top cover, corresponding upper and lower cavity isolation grooves are formed in the middle of the bottom cover, and the upper and lower cavity isolation grids are inserted into the upper and lower cavity isolation grooves to divide the refrigerant collecting box into a refrigerant upper cavity and a refrigerant lower cavity which are respectively sealed; a collecting tank refrigerant inlet and a collecting tank refrigerant outlet are respectively arranged above the left side and below the right side of the end cover; the refrigerant inlet pipe extends to the middle part of the refrigerant upper cavity through the refrigerant inlet of the collecting box; the refrigerant outlet pipe is connected with a refrigerant outlet of the collecting box positioned at the bottom of the lower cavity of the refrigerant; the U-shaped refrigerant array pipes are in a plurality of groups, each group comprises a plurality of U-shaped refrigerant array pipes, each U-shaped refrigerant array pipe comprises two straight pipes which are parallel to each other and have consistent lengths and an arc-shaped pipe connected to the tail end of each straight pipe, and the distance between the two straight pipes of each U-shaped refrigerant array pipe is different and gradually increased; one end of the straight pipe, which is far away from the arc-shaped pipe, is vertically connected with two longitudinally symmetrically arranged tube array holes on the bottom cover through threads, and each group of U-shaped refrigerant tube arrays are positioned in a longitudinal plane and are parallel to planes of the other groups of U-shaped refrigerant tube arrays; the support comprises a pore plate, a support plate and a connecting plate, wherein the pore plate is a plurality of plates arranged in parallel with the bottom cover, the length and width of the pore plate are matched with those of the bottom cover, and the lower end of the pore plate is provided with a fixed upright post; the outer side of the pore plate is provided with an outer edge with the same size as the flange plate of the bottom cover, the middle of the pore plate is provided with a tube array fixing hole with the same size and position as the tube array hole, and the U-shaped refrigerant tube array penetrates through the pore plate; a supporting plate vertically connected with the pore plates is arranged between the pore plates; the connecting plate is arranged between the bottom cover and the nearest pore plate and plays a role in connection and fixation; the baffle plate is a flat plate with an S-shaped side section and comprises an upper section, a lower section, a concave part and a convex part, the concave part and the convex part are in smooth transition to form an S-wave shape, a plurality of baffle plate array tube holes matched with the U-shaped refrigerant array tubes in size and position are uniformly arranged in the middle of the baffle plate, and the baffle plate is coupled with a plurality of groups of U-shaped refrigerant array tubes through the baffle plate array tube holes to form a compact tube plate structure; the cross section of the side surface of the baffle plate is arranged in an S-shaped wave form from top to bottom, so that water in the same temperature layer in the cooling water tank flows vertically downwards.

9. The integrated mixed cooling cold water module unit as claimed in claim 4, wherein the tubular immersed condenser is replaced with a second tubular immersed condenser, comprising a U-shaped refrigerant tubular, a bracket, a baffle plate, a refrigerant inlet pipe, a refrigerant outlet pipe, a refrigerant upper header and a refrigerant lower header, wherein the bracket comprises a pore plate and a support plate, the pore plate is a plurality of plates arranged in parallel, and the lower end of the pore plate is provided with a fixed upright post; a tube array fixing hole with the same size and position as the U-shaped refrigerant tube array is formed in the middle of the pore plate, and the U-shaped refrigerant tube array penetrates through the hole plate; a supporting plate vertically connected with the pore plates is arranged between the pore plates; the refrigerant upper collecting pipe and the refrigerant lower collecting pipe are respectively arranged at the upper end and the lower end in front of the foremost pore plate along the length horizontal direction, the left end of the refrigerant upper collecting pipe is communicated with the refrigerant inlet pipe, and the right end of the refrigerant lower collecting pipe is communicated with the refrigerant outlet pipe; the U-shaped refrigerant array pipes are divided into a plurality of groups, each group comprises a plurality of pipes, one end of each U-shaped refrigerant array pipe is led out from a certain position on the refrigerant in the length direction of the header, penetrates through a group of corresponding array pipe fixing holes on a plurality of pore plates, enters the inside of the bracket in a straight pipe form, the tail end of each U-shaped refrigerant array pipe is bent into an arc-shaped pipe, and then penetrates through another group of array pipe fixing holes on the pore plates backwards in another straight pipe form, and the other end after being led out is communicated with a corresponding position on the refrigerant in the length direction of the header; the distance between two sections of straight pipes of each U-shaped refrigerant array pipe is different and gradually increased; each group of U-shaped refrigerant array tubes are positioned in a longitudinal plane and are parallel to the planes of the U-shaped refrigerant array tubes of other groups; the baffle plate is a flat plate with an S-shaped side section and comprises an upper section, a lower section, a concave part and a convex part, the concave part and the convex part are in smooth transition to form an S-wave shape, a plurality of baffle plate array tube holes matched with the U-shaped refrigerant array tubes in size and position are uniformly arranged in the middle of the baffle plate, and the baffle plate is coupled with a plurality of groups of U-shaped refrigerant array tubes through the baffle plate array tube holes to form a compact tube plate structure; the cross section of the side surface of the baffle plate is arranged in an S-shaped wave form from top to bottom, so that water in the same temperature layer in the cooling water tank flows vertically downwards.

10. The integrated mixed cooling cold water module unit as claimed in claim 4, wherein an H-shaped same-pass multi-stage water distributor is adopted in the cooling water tank, and comprises a water distributor header pipe, a multi-stage water distribution pipe and a plurality of water distribution heads which are communicated with each other, the lower stage water distribution pipe of each stage is vertically connected with the upper stage water distribution pipe to form a multi-stage H shape, and the plurality of water distribution heads are distributed at two ends of the last stage water distribution pipe; the other end of the water distributor main pipe is communicated with a cooling circulating pump.