A new structure of filler coil type evaporative condenser and its control method

Abstract

The application belongs to the technical field of air conditioning and refrigeration equipment, and particularly relates to a filler-disk tube type evaporative condenser with a novel structure and a control method thereof, which comprises a box body, a first air inlet is formed in the left end of the upper side wall of the box body, a second air inlet is formed in the lower end of the left side wall of the box body, an air outlet is formed in the right end of the upper side wall of the box body, and a variable frequency fan is arranged in the air outlet. The application can uniformly distribute and control the wind speed field and the water speed field, effectively solve the problem that the filler-disk tube type evaporative condenser cannot maintain optimal working condition operation due to uneven distribution of the wind / water speed field, changes in environmental temperature and humidity and other factors, realize optimization of the structure of the filler-disk tube type evaporative condenser by introducing a water speed field organizing device and a wind speed field organizing device, and achieve high-efficiency energy-saving operation effect while meeting refrigeration requirements by introducing an intelligent control system and adopting an intelligent control strategy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning refrigeration equipment, in particular to a new structure of filler coil type evaporative condenser and a control method thereof. BACKGROUND

[0002] The condenser is one of the main heat exchange equipment in the refrigeration device, and its function is to transfer the heat of high-temperature and high-pressure refrigerant vapor to the cooling medium and make it condense into liquid, and its performance directly affects the operation of the refrigeration device.

[0003] The existing filler-coil type evaporative condenser adds a group of cooling tower filler layers in the traditional evaporative condenser to reduce the temperature of the sprayed water. The upper half of the condenser is usually an induced evaporative condenser, and the lower half is a cooling tower. Under the drive of the fan, the external air flows from top to bottom through the coil, and completes heat and mass exchange with the sprayed water. Then the air is guided to the right static pressure chamber by the water baffle. After the sprayed water drips from the coil, it enters the lower cooling tower filler layer and is further cooled by the new air flow. Therefore, the cooling temperature of the sprayed water on the coil is lower than that of the traditional evaporative condenser, and a lower condensing temperature can be achieved than the traditional evaporative condenser.

[0004] However, the current filler-coil type evaporative condenser design has the following problems: first, the coil is too close to the fan, which causes the air flow to tend to flow along the path with the smallest resistance, and the many dead angles in the coil area exacerbate the uneven distribution of the wind speed field; in addition, during the air extraction process, the air volume in the filler area is insufficient, which weakens the cooling effect of the evaporative condenser; at the same time, due to the fluctuation of outdoor temperature and humidity, under the current control technology, this type of evaporative condenser is difficult to maintain optimal operating conditions.

[0005] Therefore, a new structure of filler-coil type evaporative condenser and a control method thereof are proposed to realize more efficient and stable operation of the air-water dual cold source water chiller. SUMMARY

[0006] The purpose of the present application is to provide a new structure of filler-coil type evaporative condenser and a control method thereof to solve the problems raised in the background.

[0007] To achieve the above purpose, the present application provides the following technical scheme: a new structure of filler-coil type evaporative condenser, comprising a box body, a first air inlet is formed in the left end of the upper side wall of the box body, a second air inlet is formed in the lower end of the left side wall of the box body, an air outlet is formed in the right end of the upper side wall of the box body, a variable frequency fan is arranged in the air outlet, and a wind speed field organizing device is arranged in the first air inlet and the second air inlet.

[0008] The left end of the box is provided with a coil pipe, the upper end of the front side of the coil pipe is provided with a refrigerant vapor inlet, the lower end of the front side of the coil pipe is provided with a refrigerant liquid outlet, the lower end of the coil pipe is provided with a packing layer, and the right end of the coil pipe and the packing layer is provided with a water baffle.

[0009] The left side wall of the packing layer is provided with a water tray, the inside of the water tray is provided with a floating ball water replenishing valve, the left side wall of the water tray is fixedly provided with a variable frequency water pump, the water inlet end of the variable frequency water pump extends to the inside of the water tray, and the water outlet end of the variable frequency water pump is fixedly provided with a spraying mechanism.

[0010] Preferably, the spraying mechanism comprises a spraying pipe, the lower end of the spraying pipe is connected with the water outlet end of the variable frequency water pump, the upper end of the spraying pipe is provided with a first branch pipe and a second branch pipe, the number of the first branch pipe is two, and the first branch pipe is arranged at two ends respectively, the number of the second branch pipe is five, and the second branch pipe is located between the two first branch pipes, the lower side of the first branch pipe and the second branch pipe is fixedly provided with uniformly arranged spray heads, and the left end of the pipe wall of the first branch pipe and the second branch pipe is fixedly provided with an electromagnetic valve.

[0011] Preferably, the wind speed field organizing device comprises a motor, the motor is fixedly connected with the side wall of the box, the output end of the motor is fixedly provided with a transmission rod, the side wall of the transmission rod is fixedly provided with a connecting plate, the inside of the first air inlet and the second air inlet is rotatably provided with uniformly arranged guide plates through shaft rods, the side walls of the uniformly arranged guide plates are rotatably provided with a linkage plate in common, and the right end of the connecting plate and the linkage plate is rotatably connected through a shaft pin.

[0012] A control method of the new structure of the packing coil type evaporative condenser, and the specific steps of the control method are as follows:

[0013] Step one, deploy monitoring equipment to collect key parameters, including but not limited to outdoor environmental parameters, indoor load parameters, building parameters, and wind / water speed field equipment structure parameters;

[0014] Step two, based on the collected calculation parameters, the control system simulates the hourly load throughout the year through numerical simulation, establishes a hourly load distribution characteristic model, and masters the load variation law; then, the control system selects according to the design working condition refrigerating capacity, collects the operating condition parameters, structure and size parameters and refrigerant parameters of the condenser, calls the thermal equipment calculation model to calculate the condenser heat exchange and energy consumption under different air volume, water volume and air-water ratio, and collects these data into the air-water ratio and refrigerating capacity corresponding relationship database;

[0015] Step three, based on the heat exchange and energy consumption calculation results, the control system further calculates the energy efficiency ratio (COP), and establishes an energy efficiency prediction model; at the same time, the control system acquires the equipment structure parameters, quantifies the relationship between the structure parameters and the air volume and water volume through numerical calculation, and the corresponding relationship between the air volume and water volume and the running frequency of the fan, water pump and motor, so as to establish the air volume and water volume control model;

[0016] Step four, in the control link, the control system acquires the parameters in real time, calculates the instantaneous load, and according to the calculation results, calls the load distribution characteristic model, predicts the load change trend, and determines the control system running period and the required refrigerating capacity in the period; then, the control system selects the air-water ratio combination meeting the refrigeration demand from the air-water ratio database, and calls the energy efficiency prediction model to evaluate the energy efficiency ratio of the current air-water ratio combination; if the energy efficiency ratio of the current air-water ratio combination meets the design condition, the control system will call the air volume and water volume control model to adjust the equipment to implement this air-water ratio, if not, the control system will call the air-water ratio database again, select different air-water ratio combination meeting the refrigeration demand, and evaluate the energy efficiency ratio, until the most energy-saving adjustment scheme is found.

[0017] Preferably, the control system of the control method is composed of a model and a database and a control equipment cycle control.

[0018] Compared with the prior art, the control method has the following beneficial effects:

[0019] The application can uniformly distribute and control the air speed field and the water speed field, effectively solve the problem that the filler-coil type evaporative condenser cannot maintain the best working condition due to uneven distribution of air / water speed field, change of environmental temperature and humidity and other factors, realize optimization of the structure of the filler-coil type evaporative condenser by introducing the water speed field organizing device and the air speed field organizing device, and achieve the operation effect of high efficiency and energy saving by introducing the intelligent control system and the intelligent control strategy. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the application;

[0021] Figure 2 It is a structural schematic diagram of the spraying mechanism;

[0022] Figure 3 It is a structural schematic diagram of the air speed field organizing device;

[0023] Figure 4 It is a database model establishment flow chart;

[0024] Figure 5 It is a real-time control flow chart.

[0025] In the figure: 1 box, 2 first air inlet, 3 second air inlet, 4 variable frequency fan, 5 wind speed field organization device, 6 coil, 7 refrigerant vapor inlet, 8 refrigerant liquid outlet, 9 packing layer, 10 water baffle, 11 water pan, 12 floating ball water replenishing valve, 13 variable frequency water pump, 14 spray pipe, 15 first branch pipe, 16 second branch pipe, 17 spray head, 18 electromagnetic valve, 19 motor, 20 transmission rod, 21 connecting plate, 22 guide plate, 23 linkage plate. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0027] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0028] Embodiment:

[0029] Please refer to Figures 1-5 The present application provides a technical solution:

[0030] A novel structure of the packing coil type evaporative condenser, including box 1, the left end of the upper side wall of box 1 is provided with first air inlet 2, the lower end of the left side wall of box 1 is provided with second air inlet 3, the right end of the upper side wall of box 1 is provided with air outlet, the inside of air outlet is provided with variable frequency fan 4, the inside of first air inlet 2 and second air inlet 3 is provided with wind speed field organization device 5;

[0031] The left end inside box 1 is provided with coil 6, the upper end of the front side of coil 6 is provided with refrigerant vapor inlet 7, the lower end of the front side of coil 6 is provided with refrigerant liquid outlet 8, the lower end of coil 6 is provided with packing layer 9, the right end of coil 6 and packing layer 9 is provided with water baffle 10;

[0032] The lower end of the left side wall of packing layer 9 is provided with water pan 11, the inside of water pan 11 is provided with floating ball water replenishing valve 12, the left side wall of water pan 11 is fixed with variable frequency water pump 13, the water inlet end of variable frequency water pump 13 extends to the inside of water pan 11, the water outlet end of variable frequency water pump 13 is fixed with spray mechanism.

[0033] The floating ball water replenishing valve 12 is arranged one, installed in the water tray 11, and automatically replenishes water according to the water level change in the water tray 11; two variable frequency water pumps 13 are equipped, one for use and one for standby; the spraying mechanism is composed of a spraying pipe 14, a first branch pipe 15, a second branch pipe 16, an electromagnetic valve 18 and the like, a plurality of spray heads 17 are uniformly distributed on each branch pipe, and an electromagnetic valve 18 is installed at the inlet of each branch pipe; the working principle of the water velocity field organization device is that by changing the opening of the electromagnetic valve 18, the water amount flowing into the spraying branch pipe can be controlled, so that the thickness and distribution of the water film on the surface of the condenser coil 6 are adjusted, and then the heat exchange efficiency of the condenser is affected; by adjusting the power of the variable frequency water pump 13, the total amount of cooling water can be changed, and the change of the cooling water flow affects the heat exchange process of the filler layer 9 and the coil 6 in the condenser and the overall cooling effect.

[0034] The guide plates 22 are parallelly distributed and the angle can be adjusted; each group of wind velocity field organization devices is equipped with a motor 19 for adjusting the angle of the guide plate 22; the working principle of the wind velocity field organization device is that by changing the running frequency of the transmission fan, the total air volume entering the condenser is adjusted to realize the optimization of the air volume; the guide plate 22 is controlled to turn by the motor, and the left-to-right compound motion is performed to make the wind velocity field uniform in the form of repeatedly sweeping the wind; the air volume of the first air inlet and the second air inlet of the condenser is distributed to realize more uniform air volume distribution.

[0035] The spraying mechanism includes the spraying pipe 14, the lower end of the spraying pipe 14 is connected with the water outlet end of the variable frequency water pump 13, the upper end of the spraying pipe 14 is provided with the first branch pipe 15 and the second branch pipe 16, the number of the first branch pipe 15 is two, which are arranged at both ends respectively; the number of the second branch pipe 16 is five, which is located between the two first branch pipes 15, the lower side of the first branch pipe 15 and the second branch pipe 16 is fixed with the uniformly arranged spray heads 17, and the left end of the pipe wall of the first branch pipe 15 and the second branch pipe 16 is fixed with the electromagnetic valve 18.

[0036] The wind speed field organizing device comprises a motor 19 fixedly connected with the side wall of the box body 1, an output end of the motor 19 is fixed with a transmission rod 20, a side wall of the transmission rod 20 is fixed with a connecting plate 21, the first air inlet and the second air inlet are both internally provided with uniformly arranged guide plates 22 which are rotationally arranged through shaft rods, the side walls of the uniformly arranged guide plates 22 are commonly rotationally arranged with a linkage plate 23, the right ends of the connecting plate 21 and the linkage plate 23 are rotationally connected through a shaft pin, the cooling water flow and distribution flowing into the spray pipe 14 can be controlled by adjusting the opening degree of the electromagnetic valve 18, the total amount of cooling water can be changed by adjusting the power of the variable frequency water pump 13, when the required refrigerating capacity of the water chiller unit is large, all the electromagnetic valves 18 are opened and the operating frequency of the variable frequency water pump 13 is increased, so as to ensure that sufficient water flow enters the condenser to cool the refrigerant; on the contrary, when the required refrigerating capacity of the water chiller unit is small, the control system closes part of the electromagnetic valves 18 according to the calculation results and actual demand, adjusts the cooling water distribution, and reduces the operating frequency of the variable frequency water pump 13 to reduce the water flow, which reduces the energy consumption while avoiding the uneven cooling and heating situation.

[0037] The circulation process of the cooling water is as follows: the cooling water is sucked out from the water tray 11 by the variable frequency water pump 13, uniformly sprayed on the outer surface of the coil pipe 6 by the spraying mechanism, and exchanges heat with the air flow sucked in by the first air inlet 2, flows into the lower filler layer 9 after the coil pipe 6 and is cooled by the air flow sucked in by the second air inlet 3, and flows into the lower water tray 11 to complete the circulation.

[0038] The circulation process introduces the wind speed field organizing device to realize intelligent regulation and control of the wind speed field, the motor 19 controls the angle of the guide plate 22, so that it can be adjusted from left to right or from right to left, and the process is complex, the guide plate 22 will repeatedly sweep the wind; at the same time, in order to more finely control the wind speed field, two motors 19 are provided, the two motors 19 work independently, and the air inlet amount of the first air inlet 2 and the second air inlet 3 is adjusted respectively and independently, so that more accurate air volume distribution is realized, the air flow is uniformly guided to flow through the heat exchange area, and the uniform air flow distribution can effectively reduce the local overheating or overcooling situation; in addition, the frequency of the variable frequency fan 4 is adjusted to realize regulation and control of the total air volume, when the required refrigerating capacity is large, the frequency of the variable frequency fan 4 is increased to increase the air inlet amount; on the contrary, when the required refrigerating capacity is small, the frequency of the variable frequency fan 4 is reduced.

[0039] A control method of a new structure of a filler coil pipe type evaporative condenser, the specific step process of the control method is as follows:

[0040] Step one, deploy monitoring equipment to collect key parameters, including but not limited to outdoor environmental parameters, indoor load parameters, building parameters, wind / water speed field equipment structure parameters;

[0041] Step two, based on the collected relevant calculation parameters, the control system simulates the hourly load throughout the year by numerical simulation to establish a model of hourly load distribution characteristics and master the load variation law; then, the control system will select the type according to the design operating condition refrigerating capacity, and collect the operating condition parameters, structure and size parameters of the condenser and refrigerant parameters, call the thermal equipment calculation model to calculate the condenser heat exchange and energy consumption under different air volume, water volume and air-water ratio, and summarize these data into the air-water ratio and refrigerating capacity corresponding relationship database;

[0042] Step three, based on the calculation results of heat exchange and energy consumption, the control system further calculates the energy efficiency ratio (COP) to establish an energy efficiency prediction model; at the same time, the control system collects the equipment structure parameters, quantifies the relationship between structure parameters and air volume, water volume by numerical calculation, and the corresponding relationship between air volume, water volume and the operating frequency of fan, water pump, motor and other equipment, to establish an air volume and water volume control model;

[0043] Step four, in the control link, the control system collects the parameters in real time, calculates the instantaneous load, and according to the calculation results, calls the load distribution characteristics model to predict the load variation trend, and determines the control system operating cycle and the required refrigerating capacity in the cycle; then, the control system selects the air-water ratio combination that meets the refrigeration demand from the air-water ratio database, and calls the energy efficiency prediction model to evaluate the energy efficiency ratio of the current air-water ratio combination; if the energy efficiency ratio of the current air-water ratio combination meets the design operating condition, the control system will call the air volume and water volume control model to adjust the equipment to implement this air-water ratio, if not, the control system will call the air-water ratio database again, select different air-water ratio combinations that meet the refrigeration demand, and evaluate the energy efficiency ratio, until the most energy-saving adjustment scheme is found.

[0044] The control system of the control method is composed of model and database establishment and control equipment cyclic regulation two parts, in the intelligent control system, temperature and humidity sensor, anemometer, pressure sensor, flowmeter, ammeter and other monitoring equipment are connected with flow field organization device, valve and computer through signal line.

[0045] Working principle:

[0046] Cooling water is sucked out from the water tray 11 by the frequency conversion water pump 13, uniformly sprayed on the outer surface of the coil pipe 6 by the spraying mechanism, cooled by the air flow sucked in by the second air inlet 3 after flowing through the coil pipe 6, and flows into the lower water tray 11 to complete the cycle; the air flow field organization device 5 is introduced to optimize the air flow organization and adjust the air volume, and the water flow field organization device is introduced to optimize the water volume and water flow distribution; based on the intelligent control system, the model database is established by numerical simulation and numerical calculation, the air volume, water volume, air-water ratio corresponding to the required refrigerating capacity are obtained based on the calculation model and monitoring data, and the energy efficiency ratio is checked, and the optimal scheme is adopted to adjust the fan, water pump, motor and other equipment.

[0047] The foregoing merely illustrates the principles of the application and application of its more particular preferred aspects and embodiments. This description and examples should not be construed as limiting the scope of the claims to the specifically abovementioned methods. Those skilled in the art will readily observe that other suitable methods and / or equivalents can be employed, without departing from the spirit and scope of the application. Such changes as are considered necessary or desirable in order to fall within the scope of the claims or to meet practical requirements are intended to be covered by the application. It is the intent of the applicant that any additional patentable or patentably supportable claims that can be presented by the issuing of this patent may include at least the following: any apparatus claims of the application in the exact form as written in this specification; any apparatus claims of the application reciting both structure and function and / or means plus function claims. Accordingly, the patentable scope of this disclosure is set by the claims, including the claims as amended during prosecution and any subsequent termination fees, restrictions, or terms or termination of the patent life before its expiration are hereby disclaimed.

[0048] While embodiments of the application have been shown and described, it is to be understood that various additional changes and modifications can be made without departing from the spirit and scope of the present application, as defined in the following claims.

Claims

1. A new structure of filler coil type evaporative condenser, comprising a box (1), characterized in that, The left end of the upper side wall of the box (1) is provided with a first air inlet (2), the lower end of the left side wall of the box (1) is provided with a second air inlet (3), and the right end of the upper side wall of the box (1) is provided with an air outlet, and the inside of the air outlet is provided with a variable frequency fan (4), and the inside of the first air inlet (2) and the second air inlet (3) is provided with a wind speed field organizing device (5); The left end of the inside of the box (1) is provided with a coil (6), the upper end of the front side of the coil (6) is provided with a refrigerant vapor inlet (7), the lower end of the front side of the coil (6) is provided with a refrigerant liquid outlet (8), the lower end of the coil (6) is provided with a packing layer (9), and the right end of the coil (6) and the packing layer (9) is provided with a water baffle (10); The lower end of the left side wall of the packing layer (9) is provided with a water pan (11), the inside of the water pan (11) is provided with a floating ball water replenishing valve (12), the left side wall of the water pan (11) is fixed with a variable frequency water pump (13), the water inlet end of the variable frequency water pump (13) extends into the inside of the water pan (11), and the water outlet end of the variable frequency water pump (13) is fixed with a spraying mechanism; The spraying mechanism comprises a spraying pipe (14), the lower end of the spraying pipe (14) is connected with the water outlet end of the variable frequency water pump (13), the upper end of the spraying pipe (14) is provided with a first branch pipe (15) and a second branch pipe (16), the number of the first branch pipe (15) is two, which are respectively arranged at both ends; the number of the second branch pipe (16) is five, which is located between the two first branch pipes (15), and the lower sides of the first branch pipe (15) and the second branch pipe (16) are fixed with uniformly arranged spray heads (17), and the left ends of the pipe walls of the first branch pipe (15) and the second branch pipe (16) are fixed with electromagnetic valves (18); The wind speed field organizing device comprises a motor (19), the motor (19) is fixedly connected with the side wall of the box (1), the output end of the motor (19) is fixed with a transmission rod (20), the side wall of the transmission rod (20) is fixed with a connecting plate (21), the inside of the first air inlet and the second air inlet is rotatably provided with uniformly arranged guide plates (22) through shaft rods, and the side walls of the uniformly arranged guide plates (22) are rotatably provided with a linkage plate (23) together, and the right ends of the connecting plate (21) and the linkage plate (23) are rotatably connected through a shaft pin.

2. A control method for the novel structure of the packing coil type evaporative condenser according to claim 1, characterized in that: The specific steps of the control method are as follows: Step one, deploy monitoring equipment to collect key parameters, including but not limited to outdoor environmental parameters, indoor load parameters, building parameters, and wind / water speed field equipment structure parameters; Step two, based on the collected relevant calculation parameters, the control system through numerical simulation of the whole year hourly load, to establish the hourly load distribution characteristics model, to master the load variation law; then, the control system will be according to the design condition refrigerating capacity selection, and the collection of condenser operating condition parameters, structure and size parameters and refrigerant parameters, call heat equipment calculation model to calculate the different air volume, water volume, air water ratio under the condenser heat transfer and energy consumption, and these data are summarized to the air water ratio and refrigeration capacity corresponding relationship database; Step three, based on the heat transfer and energy consumption calculation results, the control system further calculates the energy efficiency ratio (COP), to establish the energy efficiency prediction model; at the same time, the control system according to the collected equipment structure parameters, through numerical calculation of the relationship between the structure parameters and air volume, water volume, and the corresponding relationship between air volume, water volume and fan, water pump, motor and other equipment running frequency, so as to establish the air volume and water volume control model; Step four, in the control link, the control system real-time acquisition of the parameters, calculation of instantaneous load, and according to the calculation results call load distribution characteristics model, to predict the load variation trend, according to determine the control system running cycle and the required refrigerating capacity in the cycle; Then, the control system from the air water ratio database to select the air water ratio combination to meet the refrigeration demand, and call the energy efficiency prediction model, to evaluate the current air water ratio combination of energy efficiency ratio; if the current air water ratio combination of energy efficiency ratio meets the design condition, the control system will call the air volume, water volume control model, adjust the equipment to implement this air water ratio, if not, the control system will call the air water ratio database again, to select different air water ratio combination to meet the refrigeration demand, and carry on the energy efficiency ratio evaluation, until the most energy saving adjustment scheme is found.

3. A control method of a novel structured packing coil type evaporative condenser according to claim 2, characterized in that: The control method of the control system is composed of model and database establishment and control equipment cycle regulation.

Images