Refrigeration system

Abstract

The invention relates to the field of condensers, in particular to a refrigerating system. The refrigerating system comprises a falling film condenser, a first liquid condensation pipe and a second liquid condensation pipe in the falling film condenser are communicated with an expansion valve, the expansion valve is communicated with an evaporator, the evaporator is communicated with a compressor, and the compressor is communicated with a first gaseous condensation pipe and a second gaseous condensation pipe of the condenser. The condenser further comprises a condenser pipe group; the condenser main box is provided with an exhaust channel located in the middle and condensation bins located on the two sides of the exhaust channel. A fan is arranged vertically above the condenser main box, and the fan is communicated with the exhaust channel; a water tank is arranged below the condenser main box; the condensation bin is communicated with the exhaust channel through the upper part of the water tank; an air inlet is formed in the side face of the upper portion of each condensation bin. And each condensation bin is internally provided with the corresponding condensation pipe set.

Description

[0001] This application is a divisional application of a patent application with an application date of October 16, 2024, an application number of 202411441990.2, and an invention name of "Condenser tube group and falling film condenser, condensation method and refrigeration system using the same". Technical Field

[0002] The invention relates to the field of condensers, in particular to a refrigeration system. Background Art

[0003] In the refrigeration system, the evaporator, condenser, compressor and expansion valve are the four essential parts of the refrigeration system. Among them, the evaporator is a device for delivering cold. The refrigerant absorbs the heat of the cooled object to achieve refrigeration. The compressor is the heart, which plays the role of sucking, compressing and delivering refrigerant vapor. The condenser is a device that releases heat, and transfers the heat absorbed in the evaporator together with the heat converted by the compressor work to the cooling medium. The expansion valve throttles and reduces the pressure of the refrigerant, and at the same time controls and regulates the amount of refrigerant liquid flowing into the evaporator, and divides the system into two parts: the high-pressure side and the low-pressure side. In the actual refrigeration system, in addition to the above four major parts, there are often some auxiliary equipment, such as solenoid valves, distributors, dryers, collectors, fusible plugs, pressure controllers and other components, which are set to improve the economy, reliability and safety of operation.

[0004] The condenser is a component of the refrigeration system and a type of heat exchanger. It can convert gas or steam into liquid and transfer the heat in the condenser tube to the air near the condenser tube in a very fast way. The working process of the condenser is an exothermic process, so the condenser temperature is relatively high. There are many different types of condensation. The water-cooled condenser uses water as the cooling medium and relies on the temperature rise of the water to take away the condensation heat. The cooling water is generally circulated, but a cooling tower or cooling water pool is required in the system. The water-cooled condenser can be divided into two types according to its structural form: shell and tube condenser and sleeve condenser. The most common one is the shell and tube condenser. The air-cooled condenser uses air as the cooling medium and relies on the temperature rise of the air to take away the condensation heat. This type of condenser is suitable for occasions where there is an extreme lack of water or no water supply, and is commonly found in small Freon refrigeration units.

[0005] Among them, the evaporative condenser is the main heat exchange equipment in the refrigeration system. Its working principle is as follows: The high-temperature and high-pressure refrigerant gas discharged by the compressor in the refrigeration system passes through the condensation pipes in the evaporative condenser, enabling the high-temperature gaseous refrigerant to exchange heat with the spray water and air outside the pipes. That is, the gaseous refrigerant enters the pipes from the upper opening and is gradually condensed into liquid refrigerant from top to bottom. The super-strong wind of the supporting induced draft fan makes the spray water completely and evenly cover the surface of the coil. With the help of the wind, the heat exchange effect is greatly improved. Part of the spray water with increased temperature turns into gas, and a large amount of heat is carried away by the wind using the latent heat of vaporization of water. The water droplets in the hot air are intercepted by the high-efficiency dehydrator and, together with the remaining water that has absorbed heat, fall into the PVC water spray sheet heat exchange layer, are cooled by the flowing air, the temperature decreases, and then enters the water tank and continues to circulate through the circulating water pump. The water evaporated into the air is automatically replenished by the water level regulator.

[0006] After years of development, the technology of the condenser is relatively mature, but there are still at least the following deficiencies at present: 1. In the existing evaporative condenser, there is a fan and a water distribution pipe at the top. Below the water distribution pipe is the condensation pipe, below the condensation pipe is the packing, and at the bottom of the packing is the water tank. The water distribution pipe drains water downward, and the water flows downward. There is an air inlet on the side. The position of the air inlet is lower than the packing and the condensation pipe but higher than the water tank. When the fan starts, it sucks air from the air inlet from bottom to top. The sucked air first passes through the packing. The packing plays a role in guiding the air, and the water flows downward on the packing. There is a water tank at the bottom to collect the cooled water; during the process of the packing making the water flow downward, it increases the contact area and time between the air and the water, so that the air can carry away more heat. The directions of the air and the water are reverse throughout the process, and the water will hinder the incoming air, making the air distribution uneven.

[0007] 2. Evaporative condensers originally rely on the contact of water on the surface of the condenser tubes to lower the evaporation temperature of the refrigerant as much as possible. As for how low it can be lowered, it depends on the water volume, air volume, and most importantly, the inlet air temperature. The lower the temperature of the incoming air, the lower the evaporation temperature. If the temperature of the air when it contacts the condenser tubes is high, then the evaporation temperature will be high, and the condensation effect will be greatly reduced. The existing design has a major drawback. That is, after the air enters and exchanges heat with the condenser, it first passes through the packing, which can cool the water in the packing, but cooling the water is not the key point. The key point is that the condensation temperature should be low. However, when the air first passes through the packing, its temperature has already increased, resulting in the temperature of the air after passing through the packing not being as low as before when it contacts the condenser tubes, which is not conducive to condensation. Because the essential purpose is to cool the condenser tubes to achieve the maximum efficiency and realize phase change, rather than just lowering the temperature of the water. Therefore, the positive advantages of the packing are few, and the negative impacts are greater. However, since the packing is one of the essential accessories and cannot be removed, if the packing is removed, the air guiding property and uniformity will not be as good. Based on this, technicians in this industry have not paid attention to this aspect, and it is also the consensus in the industry that the air flows from the bottom, which has formed a common prejudice in this industry, not believing that this aspect has an impact. Therefore, everyone in the industry has overlooked this problem.

[0008] 3. Currently, the pipelines on the condenser are all horizontally placed. In the condenser, the refrigerant entering the condenser is gaseous, and the refrigerant after condensation is liquid. For the horizontally arranged pipelines, the liquid refrigerant will not flow forward actively inside the pipes, and a large amount of liquid refrigerant will remain in each pipeline. The liquid refrigerant in the pipeline completely relies on the pressure inside the pipeline to push it forward, and even when the compressor is pushing the fluid forward, there will still be a large amount of liquid refrigerant remaining in the pipeline, occupying a large amount of space inside the condenser tubes. Currently, most of the refrigerant flowing forward in the condenser is gaseous, and a lot of the liquid refrigerant remains in the pipeline. Usually, only when the amount of liquid refrigerant in the condenser tubes exceeds a certain amount will it flow forward.

[0009] 4. In the existing condenser, and until the entire refrigeration unit shuts down, there is still a considerable amount of liquid refrigerant in the condenser tubes that has not flowed into the end close to the evaporator. On the one hand, this causes waste and affects efficiency; on the other hand, when the refrigeration unit just starts running, the refrigerant inhaled by the evaporator sometimes mixes with gaseous refrigerant, while the liquid refrigerant remains in the condenser tubes.

[0010] 5. There is a certain amount of liquid refrigerant residue in each section of the condenser tubes. However, there are a very large number of condenser tubes in a condenser. When these numerous condenser tubes are added together, the amount of liquid refrigerant residue in the tubes is quite large.

[0011] 6. In the prior art, there are also condensers arranged vertically, which have even greater drawbacks. Because when condensers are arranged vertically, the condensers have different heights, which is even more disadvantageous for the flow of the refrigerant. There is a greater amount of liquid refrigerant remaining in the condensers. The liquid refrigerant will accumulate at the bottom of each pipeline, and in this case, there is liquid refrigerant at the bottom. In the present invention, the condensers are inclined, and no liquid refrigerant will be stored in the pipes.

[0012] 7. No matter which design of the condenser is adopted, there will always be liquid refrigerant remaining in the condenser that cannot flow to the evaporator. During the operation of the refrigeration unit, the most important function of the condenser is to remove heat and achieve the phase change of gaseous refrigerant into liquid refrigerant. During the heat exchange process, the gaseous refrigerant is constantly changing into liquid refrigerant. In this process, the amount of liquid refrigerant in the condenser is increasing. At this time, if the liquid refrigerant can be discharged in time, a larger area will be left for the new gaseous refrigerant to conduct heat exchange, enabling more gaseous refrigerant to be transformed into liquid refrigerant, thereby achieving higher efficiency. However, if there is liquid refrigerant remaining in the condenser that has not been discharged, this liquid refrigerant will reduce the heat exchange area of the condenser. Especially in places where the pipeline has a high-low inclination angle or a slight bend, more liquid refrigerant accumulates in the concave position, resulting in a greater reduction in the heat exchange area. When starting the machine, the operating power of the machine is greater, but the efficiency does not increase correspondingly. The refrigeration capacity of the refrigeration unit is not proportional to the power. These are all problems that have not been discovered in the existing industry, but this problem has a great impact on the condensation efficiency.

[0013] 8. The applicant is Guangdong Anjia Air Conditioning Refrigeration Co., Ltd. Its own existing patent, the Chinese patent authorization announcement number: CN115615054B, the patent name is: A falling curtain type condenser. In this prior art, due to the narrowing treatment at the end of the condenser pipe, at least a part of the liquid refrigerant in each condenser pipe is also further trapped and cannot come out. However, if the end of the condenser pipe is not subjected to the narrowing treatment, it is not conducive to achieving good sealing when welding the main pipe.

[0014] 9. In the existing condenser, the downward flowing water film increases the contact between water and the condenser pipe, but it also forms water walls, blocking the flow range of the wind and preventing a part of the wind from blowing to the inner condenser pipes. However, if the wind is made stronger, it can pass through the water film, but it will blow away the water on the surface of the condenser pipe. Therefore, this is a very big contradictory problem at present.

[0015] 10. Currently, due to the remaining liquid refrigerant in the condenser pipe, the liquid refrigerant occupies the space of the condenser pipe, reducing the heat exchange area of the condenser pipe, resulting in a waste of the power of the compressor and the condenser, a reduction in the condensation amount, and the need to increase the cold water volume and lower the cold water temperature to achieve efficient condensation.

[0016] 11. In the precipitation of the existing condenser tube, water mainly covers the surface of the main body of the condenser tube, and the condenser tube at the bending part cannot be covered by water, resulting in the interruption of the precipitation of the entire condenser tube at the bending part. Summary of the Invention

[0017] The object of the present invention is to solve at least part of the existing problems mentioned in the above background technology and bring corresponding technical effects.

[0018] To solve the above technical problems, the condenser tube group of the present invention includes: The first condenser tube, which has at least three first pipeline bodies arranged in parallel. There is a first bending part between each first pipeline body and another first pipeline body; each two adjacent first bending parts are respectively at different ends of the first pipeline body; the first condenser tube has an inlet end and an outlet end, and the horizontal position of the inlet end is higher than the horizontal position of the outlet end; the horizontal heights of at least three first pipeline bodies are respectively in a stepped and gradually decreasing position; each first bending part is at the same inclination angle; at least three first pipeline bodies and the first bending part, the inlet end and the outlet end are on the same straight line; The second condenser tube, which has at least three second pipeline bodies arranged in parallel. There is a second bending part between each second pipeline body and another second pipeline body; each two adjacent second bending parts are respectively at different ends of the second pipeline body; the second condenser tube has an inlet end and an outlet end, and the horizontal position of the inlet end is higher than the horizontal position of the outlet end; the horizontal heights of at least three second pipeline bodies are respectively in a stepped and gradually decreasing position; each second bending part is at the same inclination angle; at least three second pipeline bodies and the second bending part, the inlet end and the outlet end are on the same straight line; The first condenser tube and the second condenser tube are in a vertically stacked state; the first pipeline body of the first condenser tube and the second pipeline body of the second condenser tube are in the same vertical straight line; the first bending part of the first condenser tube and the second bending part of the second condenser tube are in a vertically non-overlapping position.

[0019] As a preferred embodiment of the condenser tube group of the present invention, it includes at least three first condenser tubes and at least three second condenser tubes, and the first condenser tubes and the second condenser tubes are distributed at intervals.

[0020] As a preferred embodiment of the condenser tube group of the present invention, the inlet ends of the first condenser tube and the second condenser tube are in opposite directions; the outlet ends of the first condenser tube and the second condenser tube are in opposite directions.

[0021] As a preferred embodiment of the condenser tube group of the present invention, it includes: A first gaseous condenser tube that simultaneously communicates with the liquid inlet ends of all the first condenser tubes; A second gaseous condenser tube that simultaneously communicates with the liquid inlet ends of all the second condenser tubes; A first liquid condenser tube that simultaneously communicates with the liquid outlet ends of all the first condenser tubes; A second liquid condenser tube that simultaneously communicates with the liquid outlet ends of all the second condenser tubes.

[0022] The falling film condenser of the present invention includes: the condenser tube group of any one of the above; A main condenser box that has an exhaust passage in the middle and condensation chambers on both sides of the exhaust passage; there is a fan vertically above the main condenser box, and the fan communicates with the exhaust passage; there is a water tank below the main condenser box; The condensation chambers communicate with the exhaust passage above the water tank; Each of the condensation chambers has an air inlet on the upper side; The condenser tube group is respectively installed in each of the condensation chambers, and the condenser tube group covers the cross-section of the condensation chamber; the condenser tube group is entirely above the condensation chamber.

[0023] As a preferred embodiment of the falling film condenser of the present invention, packing is respectively installed in each of the condensation chambers, and the packing is vertically below the condenser tube group.

[0024] As a preferred embodiment of the falling film condenser of the present invention, each of the condensation chambers has a buffer space above, and the buffer space is at the same horizontal height as the air inlet.

[0025] As a preferred embodiment of the falling film condenser of the present invention, it includes a main water pipe that is at an inclined angle, the main water pipe is connected to at least three water distribution pipes, and at least three water distribution pipes are distributed in a stepped manner and are on the same diagonal line; each water distribution pipe has an outlet below; Above each of the first pipe bodies at the uppermost part of the condenser tube group, there is a water distribution pipe arranged in parallel, and the outlet of the water distribution pipe is adjacent to the upper surface of the first pipe body vertically.

[0026] The falling film condenser of the present invention deletes the packing and is composed of the condenser tube group of any one of the above and the main condenser box; The composition of the main condenser box is as follows: an exhaust passage in the middle, and condensation chambers on both sides of the exhaust passage; a fan is provided vertically above the condenser, and the fan communicates with the exhaust passage; a water tank is provided below the condenser; the condensation chambers communicate with the exhaust passage above the water tank; An air inlet is provided on the upper side of each condensation chamber; A condensation tube group is respectively installed in each condensation chamber; the condensation tube group is integrally located above in the condensation chamber.

[0027] The condensation method of the present invention uses the condensation tube group of any one of the above or the falling film condenser of any one of the above; Obtain gaseous refrigerant, and the gaseous refrigerant flows obliquely downward along the first condensation tube and the second condensation tube of the condensation tube group; Obtain condensed water, and the condensed water is distributed vertically downward; the condensed water forms a vertical water film with at least each row of the first pipeline main body and the second pipeline main body in the condensation tube group, so that the condensed water exchanges heat with the first condensation tube and the second condensation tube in the condensation tube group, and the gaseous refrigerant completes a phase change; the water film forms an oblique intersection angle with the flow direction of the gaseous refrigerant and flows downward respectively; Obtain cold air, and the cold air flows vertically downward through the gap between every two rows of water films, exchanges heat with the condensation tubes and the condensed water and takes away heat, so that the gaseous refrigerant undergoes a phase change; Utilize the first condensation tube and the second condensation tube in the condensation tube group at an inclined angle to enable the gaseous refrigerant to be quickly transformed into a liquid refrigerant and flow downward in a timely manner; timely create space in the first condensation tube and the second condensation tube to retain a larger heat exchange area, so that more gaseous refrigerant completes a phase change, thereby improving efficiency.

[0028] As a preferred implementation of the condensation method of the present invention, a wider air inlet is realized by using the condensation tube group at an inclined angle; Use the buffer space to make the distribution of cold air more uniform.

[0029] The refrigeration system of the present invention includes the falling film condenser of any one of the above. The first liquid condensation tube and the second liquid condensation tube in the falling film condenser are connected to an expansion valve, the expansion valve is connected to an evaporator, the evaporator is connected to a compressor, and the compressor is connected to the first gaseous condensation tube and the second gaseous condensation tube of the condenser.

[0030] Beneficial effects The present invention solves the above existing problems and other existing problems not mentioned one by one above, and correspondingly brings at least the following innovative advantages: The condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system. Since the first condenser tube and the second condenser tube of the condenser tube group are respectively at an inclined angle, the whole condenser tube group is at an inclined angle, which increases the air inlet surface during the application process and solves the contradiction problem between the size of the air inlet and the volume of the condenser in the prior art.

[0031] The condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system. By changing the position of the air inlet, the position of the air inlet is set on the side of the main box of the condenser, and importantly, this position is above the condensation chamber. And the present invention changes the air inlet direction to inlet air from above, so that the flowing directions of the inlet air and the water distribution are the same, thus the water on the surface of the condenser tube will not be blown away and the condenser tube will not be exposed. The condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system. Since the air inlet is set on the side, when solving the problems of large air inlet volume and large volume, it also plays the role of being far away from the fan, so it is not easy to suck the hot air of the fan, and solves the problem that the existing technical solution is easy to suck the hot air of the fan back.

[0032] The condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system. Since the position of the air inlet is higher than the condenser tube group, inlet air from above is realized; and there is also a buffer space in the condensation chamber, so that the air can evenly pass through between the water films of the condenser tube group, solving the problems that the side inlet air in the prior art will blow away the water on the surface of the condenser tube and the existing condenser tube will block the inlet air.

[0033] The condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system. Since the air inlet direction and the water flow direction are the same, and the air passes through between the water films, while taking away the heat, the water on the surface of the condenser tube will not be blown open, solving the problem that in the prior art, once there is no water covering the surface of any condenser tube, then a larger area below this position will have no water covering, seriously affecting the condensation effect.

[0034] The condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system. Since the air inlet direction and the water flow direction are the same, and the air passes through between the water films, the water on the surface of the condenser tube will not be blown open. On the one hand, it is beneficial to take away the heat, and on the other hand, the air is more evenly distributed, solving the problems that water will hinder the inlet air, the air will blow away the water on the surface of the condenser tube, and water will make the air distribution uneven; it also solves the problem that the air in the prior art first contacts the filler and then heats up.

[0035] The condenser tube group of the present invention, the falling film condenser, the condensation method and the refrigeration system using the condenser tube group. The incoming air first contacts the first condenser tube and the second condenser tube, which more effectively improves the efficiency. Moreover, the condenser tube group of the present invention is at an inclined angle, while the first pipeline main body and the second pipeline main body are arranged vertically, and the flowing directions of water and air are the same. Therefore, on the one hand, the problem of temperature rise caused by the packing is solved. On the other hand, the present invention can dispense with the packing, can delete the packing, changing the traditional prejudice existing in the industry; in the case of no packing, the directivity of the air is still very good, and the cost is low while the efficiency can be improved.

[0036] The condenser tube group of the present invention, the falling film condenser, the condensation method and the refrigeration system using the condenser tube group. The first condenser tube and the second condenser tube in the condenser tube group of the present invention are at an inclined angle, and the first condenser tube and the second condenser tube form a vertical row at the inclined angle. The liquid refrigerant in the first condenser tube and the second condenser tube can flow quickly into the first liquid condenser tube and the second liquid condensation refrigerant tube, leaving a larger contact area for the first condenser tube and the second condenser tube to conduct heat exchange in real time, making the phase change of the refrigerant more efficient and more sufficient. And even if the power of the refrigeration unit is turned down a little, due to the improved heat exchange capacity, the refrigeration capacity of the evaporator will not be affected, thus saving the condensation cost and greatly improving the efficiency. Because the heat exchange area is larger, the phase change conversion rate of the refrigerant is higher, and the same or similar efficiency as that of the original high power can be achieved even when the power of the refrigeration unit is small.

[0037] The condenser tube group of the present invention, the falling film condenser, the condensation method and the refrigeration system using the condenser tube group. Since the condenser tube group is at an inclined angle, the liquid refrigerant in all the first condenser tubes and the second condenser tubes will flow better forward, that is, it solves the problems of the liquid refrigerant occupying space in the current condenser tube and low heat exchange efficiency, and at the same time provides a large amount of refrigerant for the evaporator, bringing an effect of one plus one greater than two.

[0038] The condenser tube group of the present invention, the falling film condenser, the condensation method and the refrigeration system using the condenser tube group. Even after the refrigeration unit is shut down, the liquid refrigerant in the first condenser tube and the second condenser tube can slowly flow forward without the push of the compressor, so that the refrigerant remaining in the first condenser tube and the second condenser tube is all gaseous refrigerant; and this also facilitates that when starting up next time, more liquid refrigerant is supplied to the evaporator at the moment of starting up. It solves the problem that the current refrigeration equipment always has a large amount of liquid refrigerant remaining in the condenser tube until the system is shut down, but part of the gaseous refrigerant is sucked into the evaporator.

[0039] The condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system. Since the first condenser tube and the second condenser tube are always in an inclined state, and the position of the inflow end is higher than that of the outflow end, it is not easy for liquid refrigerant to remain in the condenser tube whether during the operation of the refrigeration unit or in the shutdown state. It also solves the problem of serious residual liquid refrigerant brought by the currently vertically arranged condenser tubes.

[0040] The condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system. Since the first condenser tube and the second condenser tube are always in an inclined state, the liquid refrigerant can be discharged in real time. Even when the condenser tube is bent, it is not easy for liquid refrigerant to accumulate. Compared with the prior art, the heat exchange area is increased and the efficiency is high. It solves the problem that currently, due to the high and low inclination angles or slightly bent places of the condenser tubes, more liquid refrigerant is deposited, the heat exchange area is reduced more greatly, and the refrigeration capacity of the refrigeration unit is not proportional to the power. Under the same volume and the same operating power, compared with the prior art, the present invention greatly improves the heat transfer efficiency.

[0041] The condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system. Since the first condenser tube and the second condenser tube are always in an inclined state, the liquid refrigerant can flow smoothly, solving the problem that currently, after the end of the condenser tube is narrowed, at least a part of the liquid refrigerant in each condenser tube cannot be discharged from the inventory.

[0042] The condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system. Since the first condenser tube and the second condenser tube are distributed at intervals; and the inflow ends of the first condenser tube and the second condenser tube are in opposite directions; the outflow ends of the first condenser tube and the second condenser tube are in opposite directions; therefore, the present invention solves the problem that when the number of arranged condenser tubes is too large, good sealing can be achieved without narrowing the ends of the condenser tubes.

[0043] The condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system. By installing the condenser tube group above the condensation chamber and combining the design of the air inlet and the buffer space, air can enter from above. The air first contacts the condenser tube, and the incoming air flows along the gap of the water film, which can solve the problem of not blowing away the water on the surface of the condenser tube and exposing the condenser tube, and also solve the problem that the water film in the prior art blocks the incoming air, overcoming the existing contradictory problems.

[0044] The condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system. Since the liquid refrigerant can be drained in time, it solves the problem that the existing liquid refrigerant occupies the space of the condenser tube, which will reduce the heat exchange area of the condenser tube, waste the power of the compressor and the condenser, and reduce the condensation amount. It also solves the problem that currently, it is necessary to increase the cold water volume and lower the cold water temperature to achieve condensation.

[0045] Further, when the condensed water drains on the first pipeline main body, since the first condenser tube and the second condenser tube are respectively at an inclined angle, the water can also at least partially flow to the first bending part, thereby increasing the heat exchange area and solving the problem that the existing bending part cannot conduct heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 is a perspective view of the condenser tube group of the present invention; Figure 2 is a front view of the condenser tube group of the present invention; Figure 3 is a side view of the condenser tube group of the present invention; Figure 4 is a top view of the condenser tube group of the present invention; Figure 5 is a top view of the condenser tube group of the present invention connecting the gaseous condenser tube and the liquid condenser tube; Figure 6 is an effect diagram of installing a water distribution pipe on the condenser tube group of the present invention; Figure 7 is the present invention Figure 6 is a partial enlarged view of area A in Figure 8 is an effect diagram of different inclined angles of the condenser tube group of the present invention; Figure 9 is a three-dimensional enlarged view of the first condenser tube of the present invention; Figure 10 is an effect diagram of the falling film condenser of the present invention; Figure 11 is Figure 10 is a partial enlarged view of area B in Figure 12 is another variation effect diagram of the falling film condenser of the present invention.

[0047] In the figure: 1. First condenser tube; 2. First pipeline body; 3. First bending part; 4. Inflow end; 5. Outflow end; 6. Second condenser tube; 7. Second pipeline body; 8. Second bending part; 9. First gaseous condenser tube; 10. Second gaseous condenser tube; 11. First liquid condenser tube; 12. Second liquid condenser tube; 13. Main condenser box; 14. Exhaust passage; 15. Condensation chamber; 16. Fan; 17. Water pool; 18. Filler; 19. Buffer space; 20. Main water pipe; 21. Water distribution pipe; 22. Outflow port; 23. Air inlet. Detailed implementation manners

[0048] In order to make the objectives, technical solutions and advantages of the technical solutions of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments of the present disclosure.

[0049] The same reference numerals in the accompanying drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments.

[0050] Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present disclosure.

[0051] In the prior art, there are still more problems in implementation at present, including at least: First, the heat dissipation of the condenser is proportional to the air intake volume and the air intake temperature. If the air inlet is small, the air intake volume will decrease, and the wind speed will increase. When the wind speed is high, it will further blow away the water on the surface of the condenser tube, leaving the surface of the condenser tube without water and exposed, seriously affecting the condensation efficiency. At the same time, when the wind speed is too fast, the blowing is more uneven. However, in the prior art, if the air inlet is set too large, either the volume of the whole machine will increase; the solutions are either to reduce the number of condenser tubes or to increase the height of the condenser, and it is impossible to achieve a large air inlet without changing the volume of the condenser. Therefore, in the prior art, the size of the air inlet and the volume of the condenser are a contradictory problem, and it is impossible to set a large air inlet in a small volume. Second, in the existing condenser, the flow directions of the wind and water are opposite. And on the basis of the prior art, even if the air intake position is changed to intake air from above or from the upper parts on the left and right sides so that the cold air contacts the condenser tube first, this will result in a larger volume of the condenser, inconvenient transportation, a small width of the air inlet, and more uneven flow of the wind in the condenser, further increasing the area where the surface of the condenser tube has no water and is exposed. Thirdly, further, in the case of adopting the prior art, even if the air inlet position is changed to inlet air from above or from above on the left and right sides, in actual use, the air inlet will suck in the hot air discharged by the fan and cause the hot air to circulate, resulting in all the blown air being hot air, greatly reducing the condensation efficiency, and even possibly preventing the refrigerant from completing the phase change from gaseous to liquid; Fourthly, at the same time, in the case of adopting the prior art, in order to increase the air inlet, the air inlet can also be set on the side, so that a large air inlet can be achieved. However, if the prior art is changed to side air inlet, the wind will also blow away the water on the surface of the condenser tube, exposing a large area of the surface of the condenser tube without water coverage, and the condenser tube will also block the air inlet, greatly reducing the condensation effect; Fifthly, and once there is no water covering the surface of any condenser tube, then a much larger area below that position will also have no water covering, seriously affecting the condensation effect.

[0052] The following are the specific implementation schemes of the present invention.

[0053] Embodiment 1 The condenser tube group of the present invention, see Figures 1 to 5 , including: The first condenser tube 1, the first condenser tube 1 has at least three first pipeline bodies 2 arranged in parallel, Figure 1 shows that the first condenser tube 1 has multiple; there is a first bending part 3 between each of the first pipeline bodies 2 and another first pipeline body 2 respectively; see Figure 4 , each two adjacent first bending parts 3 are respectively at different ends of the first pipeline body 2, and the first bending parts 3 at both ends are not on the same straight line; the first condenser tube 1 has an inflow end 4 and an outflow end 5, and the horizontal position of the inflow end 4 is higher than the horizontal position of the outflow end 5; see Figure 2 , the horizontal heights of at least three first pipeline bodies 2 are respectively in a stepped and gradually decreasing position; as Figure 2 shown, each of the first bending parts 3 is at the same inclination angle; at least three first pipeline bodies 2, the first bending parts 3, the inflow end 4 and the outflow end 5 are on the same straight line; The second condenser tube 6, the second condenser tube 6 has at least three second pipeline bodies 7 arranged in parallel, Figure 1 shows that the second condenser tube 6 also has multiple, and there is a second bending part 8 between each of the second pipeline bodies 7 and another second pipeline body 7 respectively; see Figure 4, every two adjacent second bending parts 8 are respectively at different ends of the second pipeline main body 7, and the second bending parts 8 at both ends are not on the same straight line; the second condenser 6 has an inlet end 4 and an outlet end 5, and the horizontal position of the inlet end 4 is higher than the horizontal position of the outlet end 5; see Figure 2 , the horizontal heights of at least three second pipeline main bodies 7 are respectively at positions that gradually decrease in a stepped manner; and as Figure 2 shown, each of the second bending parts 8 is at the same inclination angle; at least three second pipeline main bodies 7 and the second bending parts 8, the inlet end 4 and the outlet end 5 are on the same oblique line; See Figures 1 to 5 , Figure 1 , Figure 2 and Figure 4 respectively show that the first condenser 1 and the second condenser 6 are in a vertically stacked state, forming an effect of multiple rows being parallel and vertically stacked; as Figure 1 , Figure 2 and Figure 4 shown, the first pipeline main body 2 of the first condenser 1 and the second pipeline main body 7 of the second condenser 6 are on the same vertical straight line; Figure 1 , Figure 4 and Figure 5 show that the first bending part 3 of the first condenser 1 and the second bending part 8 of the second condenser 6 are in a vertically non-overlapping position.

[0054] Furthermore, Figure 6 and Figure 8 show that multiple first condensers 1 and second condensers 6 can have different inclination angles, but no matter what the angle is, the first condensers 1 and the second condensers 6 are respectively in a vertically stacked state, especially the first pipeline main body 2 and the second pipeline main body 7 are on the same vertical straight line.

[0055] Furthermore, see Figure 3 , both ends of each first pipeline main body 2 in the first condenser 1 are at the same horizontal height; as Figure 1 , Figure 2 and Figure 3 shown, the first bending parts 3 connected to both ends of each first pipeline main body 2 are at different heights, see Figure 1 , Figure 2 and Figure 3 , for both ends of each first pipeline main body 2, the lowest point of the first bending part 3 connected to one end and the highest point of the first bending part 3 connected to the other end are at the same horizontal height; See Figure 3 , both ends of each second pipeline main body 7 in the second condenser 6 are at the same horizontal height;Figure 1 , Figure 2 and Figure 3 As shown in Figure 1 , Figure 2 and Figure 3 , each second bending part 8 at both ends of each second pipeline body 7 is at a different height. Refer to Figure 1 , Figure 2 and Figure 3 . The lowest point of the second bending part 8 connected to one end among both ends of each second pipeline body 7 is at the same horizontal height as the highest point of the first bending part 3 connected to the other end.

[0056] Furthermore, refer to Figure 1 , Figure 3 , Figure 4 and Figure 5 . It includes at least three first condensing pipes 1 and at least three second condensing pipes 6. As shown in Figure 1 and Figure 2 , there are multiple first condensing pipes 1 and second condensing pipes 6 respectively. Figure 1 , Figure 3 and Figure 4 show that the first condensing pipes 1 and the second condensing pipes 6 are distributed at intervals.

[0057] Furthermore, the inlet ends 4 of the first condensing pipes 1 and the inlet ends 4 of the second condensing pipes 6 are in opposite directions; the outlet ends 5 of the first condensing pipes 1 and the outlet ends 5 of the second condensing pipes 6 are in opposite directions. Refer to Figure 4 . Figure 4 is a top view of the condensing pipe group of the present invention. The first condensing pipe 1 is at the top in the figure, and multiple first condensing pipes 1 and second condensing pipes 6 are superimposed and distributed at intervals below the first condensing pipe 1; as shown in Figure 4 , the lower right corner in the figure is the inlet end 4 of the first condensing pipe 1, and the upper left corner in the figure is the outlet end 5 of the first condensing pipe 1; as shown in Figure 3 , since the second condensing pipe 6 in Figure 4 is vertically below the first condensing pipe 1, only the positions of the second condensing pipe 6 that do not overlap with the first condensing pipe 1 are visible in Figure 4 ; the upper right corner in Figure 4 is the inlet end 4 of the second condensing pipe 6, and the lower left corner in the figure is the outlet end 5 of the second condensing pipe 6.

[0058] Furthermore, refer to Figure 5 . It includes: a first gaseous condensing pipe 9, which simultaneously communicates with the liquid inlet ends of all the first condensing pipes 1; a second gaseous condensing pipe 10, which simultaneously communicates with the liquid inlet ends of all the second condensing pipes 6; a first liquid condensing pipe 11, which simultaneously communicates with the liquid outlet ends of all the first condensing pipes 1; ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​The second liquid condenser 12, which is simultaneously connected to the outflow ends 5 of all the second condensers 6.

[0059] Embodiment 2 The falling film condenser of the present invention, this Embodiment 2 includes all the solutions of Embodiment 1; therefore, the same parts as in Embodiment 1 will not be repeated here, and only the differences will be described herein. Specifically, the falling film condenser of the present invention includes: the condenser tube group of Embodiment 1; Figure 10 It shows that the present invention is equipped with at least two condenser tube groups; It further includes a main condenser box 13, see Figure 10 , the main condenser box 13 has an exhaust passage 14 in the middle, and condensation chambers 15 on both sides of the exhaust passage 14; there is a fan 16 vertically above the main condenser box 13, and the fan 16 is connected to the exhaust passage 14; there is a water tank 17 below the main condenser box 13; As Figure 10 shown, the condensation chamber 15 is connected to another condensation chamber 15 and the exhaust passage 14 through the hollow area above the water tank 17; See Figure 10 and Figure 11 , each condensation chamber 15 has an air inlet 23 on the upper side; Figure 10 It shows that the condenser tube groups described in Embodiment 1 are respectively installed in each condensation chamber 15, and, the condenser tube groups cover the cross-section of the condensation chamber 15, that is, see Figure 10 , when there is wind blowing through the condensation chamber 15, it must pass through the condenser tube groups to make the wind blow through; the condenser tube groups are integrally located above the condensation chamber 15.

[0060] Furthermore, see Figure 10 , packing 18 is respectively installed in each condensation chamber 15, and the packing 18 is located vertically below the condenser tube groups.

[0061] Furthermore, see Figure 10 and Figure 11 , each condensation chamber 15 has a buffer space 19 above, and the buffer space 19 is at the same horizontal height as the air inlet 23.

[0062] Furthermore, see Figure 6 , Figure 7 and Figure 8 , it includes a main water pipe 20, the main water pipe 20 is at an inclined angle, and the main water pipe 20 is connected to at least three water distribution pipes 21, Figure 6 and Figure 8It is respectively shown that there are multiple water distribution pipes 21, and the number is the same as that of the first pipeline main body 2; at least three of the water distribution pipes 21 are distributed in a stepped manner and are on the same diagonal line; Figure 7 It is shown that there is an outflow port 22 below each of the water distribution pipes 21; the inclination angle of the water pipe coincides with the inclination angle of the first condensing pipe 1; Above each of the first pipeline main bodies 2 at the uppermost part in the condensing pipe group, there is a water distribution pipe 21 arranged in parallel, and the outflow port 22 of the water distribution pipe 21 is adjacent to the vertical upper surface of the first pipeline main body 2.

[0063] When the water distribution pipe 21 drains water downward, the condensed water forms at least a vertical water film with each row of the first pipeline main body 2 and the second pipeline main body 7 in the condensing pipe group, so that the condensed water exchanges heat with the first condensing pipe 1 and the second condensing pipe 6 in the condensing pipe group and enables the gaseous refrigerant to complete phase change; as Figure 7 shown, the water film forms an oblique angle with the flow direction of the gaseous refrigerant and flows downward respectively; when the fan 16 starts to exhaust air outward, fresh external air is inhaled from the position of the air inlet 23, and at least passes through the condensing pipe group and above the water tank 17 and finally is discharged through the exhaust passage 14; see Figure 11 , Figure 11 The flow effect diagram of the air is drawn, and the cold air flows vertically downward from the gap between every two rows of water films, exchanges heat with the condensing pipe and the condensed water and takes away heat, and enables the gaseous refrigerant to undergo phase change.

[0064] Embodiment 3 The falling film condenser of the present invention, this embodiment 2 includes all the solutions of embodiment 1; therefore, the same parts as in embodiment 1 will not be repeated here, and only the differences will be described here. Specifically, for the falling film condenser of the present invention, the fitting filler 18 in the prior art is deleted, and it is only composed of the condensing pipe group and the condenser main box 13 in embodiment 1; As Figure 12 shown, the composition of the condenser main box 13 is: an exhaust passage 14 in the middle, and condensing chambers 15 on both sides of the exhaust passage 14; there is a fan 16 above the condenser vertically, and the fan 16 is communicated with the exhaust passage 14; there is a water tank 17 below the condenser; the condensing chambers 15 are communicated with the condensing chambers 15 and the exhaust passage 14 above the water tank 17; There is an air inlet on the upper side surface of each of the condensing chambers 15; The condensing pipe group is respectively installed in each of the condensing chambers 15, and the condensing pipe group covers the cross section of the condensing chamber 15, that is, see Figure 10, when there is wind blowing in the condensation chamber 15, it must pass through the condensation pipe group before the wind can blow through; the whole condensation pipe group is located above the condensation chamber 15.

[0065] Further, refer to Figure 12 , above each of the condensation chambers 15, there is a buffer space 19 respectively, and the buffer space 19 is at the same horizontal height as the air inlet 23.

[0066] Further, refer to Figure 6 , Figure 7 and Figure 8 , including a main water pipe 20, the main water pipe 20 is at an inclined angle, and at least three water distribution pipes 21 are connected to the main water pipe 20, Figure 6 and Figure 8 respectively show that there are multiple water distribution pipes 21, and the quantity is the same as that of the first pipeline main body 2; at least three of the water distribution pipes 21 are distributed in a stepped manner and are on the same diagonal line; Figure 7 shows that there is an outflow port 22 below each of the water distribution pipes 21; the inclined angle of the water pipe coincides with the inclined angle of the first condensation pipe 1; above each of the first pipeline main bodies 2 at the uppermost part of the condensation pipe group, there is a water distribution pipe 21 arranged in parallel, and the outflow port 22 of the water distribution pipe 21 is close to the vertical upper surface of the first pipeline main body 2.

[0067] When the water distribution pipe 21 drains water downward, the condensed water forms at least a vertical water film with each row of the first pipeline main bodies 2 and the second pipeline main bodies 7 in the condensation pipe group, so that the condensed water exchanges heat with the first condensation pipe 1 and the second condensation pipe 6 in the condensation pipe group and enables the gaseous refrigerant to complete phase change; as Figure 7 shown, the water film forms an oblique intersection angle with the flowing direction of the gaseous refrigerant and flows downward respectively; when the fan 16 starts to exhaust air outward, fresh external air is inhaled from the position of the air inlet 23, and at least passes through the condensation pipe group and above the water pool 17 and finally is discharged through the exhaust passage 14; refer to Figure 11 , Figure 11 draws the flow effect diagram of the air, and the cold air flows vertically downward from the gap between every two rows of water films, exchanges heat with the condensation pipe and the condensed water and takes away heat to enable the gaseous refrigerant to phase change.

[0068] Embodiment 4 The condensation method of the present invention, this method will adopt all the solutions of the condensation pipe group of Embodiment 1 or the falling film condenser of Embodiment 2 and Embodiment 3; Obtain gaseous refrigerant, this gaseous condensation comes from the high-temperature and high-pressure gaseous refrigerant supplied by the compressor of the refrigeration equipment; the gaseous refrigerant flows obliquely downward along the first condensation pipe 1 and the second condensation pipe 6 of the condensation pipe group; Obtain condensed water, which comes from the water discharged from the water distribution pipe 21, and the condensed water is distributed vertically downward; see Figure 6 、 Figure 7 and Figure 8 , when the water distribution pipe 21 drains water downward, the condensed water forms at least a vertical water film with each row of the first pipeline main body 2 and the second pipeline main body 7 in the condenser tube group, so that the condensed water exchanges heat with the first condenser tube 1 and the second condenser tube 6 in the condenser tube group, and the gaseous refrigerant completes a phase change; as Figure 7 shown, the water film forms an oblique angle with the flow direction of the gaseous refrigerant and flows downward respectively; Obtain cold air, as Figure 10 and Figure 12 shown, the cold air comes from the exhaust air after the fan 16 is started, sucks in the external fresh air from the position of the air inlet 23, and finally discharges through the exhaust passage 14 after passing through at least the condenser tube group and above the water tank 17; see Figure 11 , Figure 11 draws the flow effect diagram of the air, and the cold air flows vertically downward through the gap between every two rows of water films, exchanges heat with the condenser tubes and the condensed water and takes away heat, so that the gaseous refrigerant undergoes a phase change; Utilize the first condenser tube 1 and the second condenser tube 6 in the condenser tube group at an inclined angle to enable the gaseous refrigerant to be transformed into a liquid refrigerant and flow downward in a timely and rapid manner; timely create space in the first condenser tube 1 and the second condenser tube 6 to reserve a larger heat exchange area, so that more gaseous refrigerant completes a phase change, thereby improving efficiency.

[0069] Further, see Figure 11 , when the condensed water drains on the first pipeline main body 2, since the first condenser tube 1 and the second condenser tube 6 are respectively at an inclined angle, the water can also at least partially flow to the first bending part 3, thereby increasing the heat exchange area and solving the problem that the bending part cannot conduct heat exchange at present.

[0070] Further, see Figure 10 、 Figure 11 and Figure 12 , utilize the condenser tube group at an inclined angle to realize a wider air inlet 23; Utilize the buffer space 19 to make the distribution of cold air more uniform. And the cold air can enter the gap between each water film in the condenser tube group more evenly when entering the buffer space 19 through the air inlet 23.

[0071] Embodiment 5 The refrigeration system of the present invention includes all the solutions of the falling film condenser in Embodiment 2 or Embodiment 3, and adopts the condensation method in Embodiment 4 to implement the refrigeration system of the present invention, and at least includes: an expansion valve is connected to the first liquid condensation pipe 11 and the second liquid condensation pipe 12 in the falling film condenser, the expansion valve is connected to an evaporator, the evaporator is connected to a compressor, and the compressor is connected to the first gaseous condensation pipe 9 and the second gaseous condensation pipe 10 of the condenser.

[0072] The advantages brought by Embodiments 1 to 5 of the present invention are as follows: For the condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system, since the first condensation tube 1 and the second condensation tube 6 of the condenser tube group are respectively at an inclined angle, the whole condenser tube group is at an inclined angle, so that during the application process, the air inlet surface is increased, and the contradiction problem between the size of the air inlet and the volume of the condenser in the prior art is solved.

[0073] For the condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system, by changing the position of the air inlet 23, the position of the air inlet 23 is set on the side of the main box 13 of the condenser, and importantly, this position is above the condensation chamber 15, and the present invention changes the air inlet direction to inlet air from above, so that the flowing directions of the inlet air and the water distribution are the same, thus the water on the surface of the condenser tube will not be blown away and the condenser tube will not be exposed; For the condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system, since the air inlet 23 is set on the side, therefore, while solving the problems of large air inlet volume and large volume, it also plays a role in being far away from the fan, so it is not easy to suck the hot air of the fan, and solves the problem that the existing technical solution is easy to suck the hot air of the fan back.

[0074] For the condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system, since the position of the air inlet 23 is higher than the condenser tube group, thus realizing inlet air from above; and there is also a buffer space 19 in the condensation chamber 15, so that the air can evenly pass through between the water films of the condenser tube group, solving the problems that the side inlet air in the prior art will blow away the water on the surface of the condenser tube and the existing condenser tube will block the inlet air.

[0075] For the condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system, since the air inlet direction and the water flow direction are the same, and the air passes through between the water films, while taking away the heat, the water on the surface of the condenser tube will not be blown open, solving the problem that in the prior art, once there is no water covering on the surface of any condenser tube, then a larger area below this position will have no water covering, seriously affecting the condensation effect.

[0076] The condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system. Since the air inlet direction and the water flow direction are the same, and the air passes through between the water films, it will not blow away the water on the surface of the condenser tube. On the one hand, it is beneficial to take away heat, and on the other hand, the air distribution is more uniform, solving the problems that water will hinder the air inlet, the air will blow away the water on the surface of the condenser tube, and the water will make the air distribution uneven; it also solves the problem in the prior art that the air first contacts the packing and then heats up.

[0077] For the condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system, the incoming air first contacts the first condenser tube 1 and the second condenser tube 6, which more effectively improves the efficiency. And the condenser tube group of the present invention is at an inclined angle, while the first pipeline main body 2 and the second pipeline main body 7 are vertically arranged, and the flow directions of water and air are the same. Therefore, on the one hand, the problem of heat generation caused by the packing is solved, and on the other hand, the present invention can dispense with the packing 18, can delete the packing 18, changing the traditional prejudice existing in the industry; without the packing, the air guiding property is still very good, and the cost is low while the efficiency can be improved.

[0078] For the condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system, the first condenser tube 1 and the second condenser tube 6 in the condenser tube group of the present invention are at an inclined angle, and the first condenser tube 1 and the second condenser tube 6 form a vertical row at the inclined angle. The liquid refrigerant in the first condenser tube 1 and the second condenser tube 6 can flow quickly into the first liquid condenser tube 11 and the second liquid condenser refrigerant tube 12, leaving a larger contact area in real time for the first condenser tube 1 and the second condenser tube 6 to conduct heat exchange, making the phase change of the refrigerant more efficient and more sufficient. And even if the power of the refrigeration unit is turned down a little, due to the improved heat exchange capacity, the refrigeration capacity of the evaporator will not be affected, thus saving the condensation cost and greatly improving the efficiency. Because the heat exchange area is larger, the phase change conversion rate of the refrigerant is higher, and the same or similar efficiency as that of the original high power can be achieved even when the power of the refrigeration unit is small.

[0079] For the condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system, since the condenser tube group is at an inclined angle, all the liquid refrigerant in the first condenser tube 1 and the second condenser tube 6 will flow forward better, that is, it solves the problems of the liquid refrigerant in the condenser tube occupying space and the low heat exchange efficiency at present, and at the same time provides a large amount of refrigerant for the evaporator, bringing an effect that one plus one is greater than two.

[0080] The condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system. Even after the refrigeration unit is shut down, the liquid refrigerant in the first condenser tube 1 and the second condenser tube 6 can slowly flow forward without the push of the compressor, so that the refrigerant remaining in the first condenser tube 1 and the second condenser tube 6 is gaseous refrigerant; and this also facilitates that when starting up the machine next time, more liquid refrigerant is supplied to the evaporator at the moment of starting up. It solves the problem that a large amount of liquid refrigerant always remains in the condenser tubes until the system is shut down in the current refrigeration equipment, but some gaseous refrigerant is sucked into the evaporator.

[0081] For the condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system, since the first condenser tube 1 and the second condenser tube 6 are always in an inclined state, and the position of the inflow end 4 is higher than that of the outflow end 5, it is not easy for liquid refrigerant to remain in the condenser tubes whether during the operation of the refrigeration unit or in the shutdown state, and it also solves the problem of serious residual liquid refrigerant caused by the vertically arranged condenser tubes at present.

[0082] For the condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system, since the first condenser tube 1 and the second condenser tube 6 are always in an inclined state, the liquid refrigerant that can be discharged in real time is not easy to accumulate even when the condenser tube is bent; compared with the prior art, the heat exchange area is increased and the efficiency is high; it solves the problem that at present, due to the high and low inclination angles or slightly bent places of the condenser tubes, more liquid refrigerant is deposited, the heat exchange area is reduced more greatly, and the refrigeration capacity of the refrigeration unit is not proportional to the power. The present invention greatly improves the heat transfer efficiency compared with the prior art under the same volume and the same operating power.

[0083] For the condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system, since the first condenser tube 1 and the second condenser tube 6 are always in an inclined state, the liquid refrigerant can flow smoothly, and it solves the problem that at present, the end of the condenser tube is narrowed, which further causes at least a part of the liquid refrigerant in each condenser tube to be stored and unable to come out.

[0084] For the condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system, since the first condenser tube 1 and the second condenser tube 6 are distributed at intervals; and the inflow ends 4 of the first condenser tube 1 and the second condenser tube 6 are in opposite directions; the outflow ends 5 of the first condenser tube 1 and the second condenser tube 6 are in opposite directions; therefore, the present invention solves the problem that when the number of arranged condenser tubes is too large, good sealing can be achieved without narrowing the ends of the condenser tubes.

[0085] The condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system. By installing the condenser tube group above the condensation chamber 15 and combining the design of the air inlet 23 and the buffer space 19, it is possible to introduce air from above. The air first contacts the condenser tubes, and the incoming air flows along the gaps of the water film. This can solve the problem of not blowing away the water on the surface of the condenser tubes and exposing the condenser tubes, and also solve the problem that the water film in the prior art blocks the incoming air, overcoming the existing contradictory problems.

[0086] The condenser tube group of the present invention, the falling film condenser using the condenser tube group, the condensation method and the refrigeration system. Since the liquid refrigerant can be discharged in time, it solves the current problem that the liquid refrigerant occupies the space of the condenser tubes, which will reduce the heat exchange area of the condenser tubes, waste the power of the compressor and the condenser, and reduce the condensation amount. It also solves the current problem that it is necessary to increase the amount of cooling water and lower the temperature of the cooling water to achieve condensation.

[0087] The terms "first", "second" and similar terms used in the specification and claims do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms "a", "an" or "the" and similar terms do not denote a quantity limitation, but mean that there is at least one. The terms "comprising" or "including" and similar terms mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0088] The above are the preferred embodiments of the present invention, and are not intended to limit the present invention. The protection scope of the present invention is defined by the appended claims. For those of ordinary skill in the art, without creative efforts, other embodiments can be obtained according to the drawings, and any modifications based on the claims of the present invention are within the protection scope of the present invention.

Claims

1. Refrigeration system, characterized in that, It includes a falling film condenser. An expansion valve is connected to the first liquid condensing pipe and the second liquid condensing pipe in the falling film condenser. The expansion valve is connected to an evaporator, and the evaporator is connected to a compressor. The compressor is connected to the first gaseous condensing pipe and the second gaseous condensing pipe of the condenser.

2. The refrigeration system according to claim 1, wherein The falling film condenser includes: A condensing pipe group; A main condenser box, which has an exhaust passage in the middle and condensing chambers on both sides of the exhaust passage; there is a blower above the main condenser box vertically, and the blower is connected to the exhaust passage; there is a water tank below the main condenser box; The condensing chamber is connected to the exhaust passage above the water tank; Each condensing chamber has an air inlet on the side above; The condensing pipe group is installed in each condensing chamber respectively.

3. The refrigeration system according to claim 2, characterized in that, Packing is installed in each condensing chamber respectively, and the packing is vertically below the condensing pipe group.

4. The refrigeration system according to claim 2, characterized in that, There is a buffer space above each condensing chamber respectively, and the buffer space is at the same horizontal height as the air inlet.

5. The refrigeration system according to claim 2, characterized in that, It includes a main water pipe, which is at an inclined angle. The main water pipe is connected to at least three water distribution pipes, and at least three water distribution pipes are distributed in a stepped manner and on the same diagonal line; there is an outflow port below each water distribution pipe; Above each first pipeline body at the top of the condensing pipe group, there is a water distribution pipe arranged in parallel, and the outflow port of the water distribution pipe is close to the vertical upper surface of the first pipeline body.

6. The refrigeration system according to claim 2, wherein, It includes: A first condensing pipe, which has at least three first pipeline bodies arranged in parallel. There is a first bending part between each first pipeline body and another first pipeline body; each two adjacent first bending parts are respectively at different ends of the first pipeline body; The first condensing pipe has an inflow end and an outflow end, and the horizontal position of the inflow end is higher than the horizontal position of the outflow end; the horizontal heights of at least three first pipeline bodies are respectively at positions that gradually decrease in a stepped manner; each first bending part is at the same inclined angle; A second condensing pipe, which has at least three second pipeline bodies arranged in parallel. There is a second bending part between each second pipeline body and another second pipeline body; each two adjacent second bending parts are respectively at different ends of the second pipeline body; the second condensing pipe has an inflow end and an outflow end, and the horizontal position of the inflow end is higher than the horizontal position of the outflow end; the horizontal heights of at least three second pipeline bodies are respectively at positions that gradually decrease in a stepped manner; each second bending part is at the same inclined angle; The first condensing pipe and the second condensing pipe are in a vertically stacked state; the first pipeline body of the first condensing pipe and the second pipeline body of the second condensing pipe are in the same vertical straight line; the first bending part of the first condensing pipe and the second bending part of the second condensing pipe are in a vertically non-overlapping position.

7. The refrigeration system according to claim 6, wherein It includes at least three first condensing pipes and at least three second condensing pipes, and the first condensing pipes and the second condensing pipes are distributed at intervals.

8. The refrigeration system according to claim 6, characterized in that, The inflow end of the first condenser tube and the inflow end of the second condenser tube are in opposite directions; the outflow end of the first condenser tube and the outflow end of the second condenser tube are in opposite directions.

9. The refrigeration system according to claim 6, wherein Comprising: A first gaseous condenser tube that simultaneously communicates with the liquid inlet ends of all the first condenser tubes; A second gaseous condenser tube that simultaneously communicates with the liquid inlet ends of all the second condenser tubes; A first liquid condenser tube that simultaneously communicates with the liquid outlet ends of all the first condenser tubes; A second liquid condenser tube that simultaneously communicates with the outflow ends of all the second condenser tubes.

10. The refrigeration system according to claim 6, characterized in that, At least three of the first pipeline bodies, the first bending portion, the inflow end, and the outflow end are on the same diagonal line; At least three of the second pipeline bodies, the second bending portion, the inflow end, and the outflow end are on the same diagonal line.

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