CN212457242U - Air-conditioning refrigeration machine room system - Google Patents
Air-conditioning refrigeration machine room system Download PDFInfo
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- CN212457242U CN212457242U CN202021627481.6U CN202021627481U CN212457242U CN 212457242 U CN212457242 U CN 212457242U CN 202021627481 U CN202021627481 U CN 202021627481U CN 212457242 U CN212457242 U CN 212457242U
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Abstract
The application relates to an air-conditioning refrigeration machine room system. The air-conditioning and refrigerating machine room system comprises a plurality of host systems connected in parallel and a central control device. The main machine system comprises a cooling water pump, a water chilling unit and a freezing water pump. The cooling water pump is used for circulating low-temperature water, and the freezing water pump is used for being communicated with the cold consumption device. The cooling water pump, the water chilling unit and the freezing water pump are respectively and electrically connected with the host system control device. The host system control devices are respectively electrically connected with the central control device. The central control device controls the operation of the cooling water pump, the water chilling unit and the chilled water pump in the same host system through the host system control device. Each host system includes a host system control device. The cooling water pump, the water chilling unit and the freezing water pump in the same host system are used as a module and controlled by the host system control device. When the central control device is damaged, the main machine system control device can also independently control the operation of the cooling water pump, the water chilling unit and the chilled water pump.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to an air conditioner refrigeration machine room system.
Background
At present, the air-conditioning refrigeration machine room system adopts a group control technology to optimize the number of starting machines, controls the rotating speed of a freezing water pump according to the worst loop pressure difference change of a pipe network, and controls the rotating speed of a cooling water pump according to the temperature difference of inlet and outlet water. A plurality of cooling water pumps, a plurality of cooling water units and a plurality of chilled water pumps are all connected with the central control device, and when the central control device is damaged, the plurality of cooling water pumps, the plurality of cooling water units and the plurality of chilled water pumps can not operate.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide an air conditioning and refrigeration machine room system for solving the problem that a plurality of cooling water pumps, a plurality of water chilling units and a plurality of chilled water pumps cannot operate when a central control device is damaged.
An air-conditioning and refrigerating machine room system comprises a plurality of host systems connected in parallel and a central control device. The host system comprises a cooling water pump, a water chilling unit, a freezing water pump and a host system control device. The cooling water pump, the water chilling unit and the freezing water pump are communicated in sequence. The cooling water pump is used for circulating low-temperature water. The chilled water pump is used for being communicated with the cold consumption device. The cooling water pump, the water chilling unit and the freezing water pump are respectively and electrically connected with the host system control device.
And each host system control device is electrically connected with the central control device. The central control device controls the cooling water pump, the water chilling unit and the chilled water pump in the same host system to operate through the host system control device.
In one embodiment, the water inlet of each cooling water pump is communicated with one end of a first pipeline, the cooling water outlet of each water chilling unit is communicated with one end of a second pipeline, and the air-conditioning and refrigerating machine room system further comprises a plurality of cooling tower systems and cooling tower control devices which are connected in parallel. And the water outlet of each cooling tower system is communicated with the other end of the first pipeline, and the water inlet of each cooling tower system is communicated with the other end of the second pipeline. And each cooling tower system and the central control device are respectively and electrically connected with the cooling tower control device. And the central control device adjusts the running number of the cooling tower systems through the cooling tower control device.
In one embodiment, the cooling tower system includes a cooling tower and a fan. The water outlet of the cooling tower is communicated with the other end of the first pipeline, and the water inlet of the cooling tower is communicated with the other end of the second pipeline. The fan is used for cooling water in the cooling tower. The fan is electrically connected with the cooling tower control device.
In one embodiment, the chiller includes an evaporator, a condenser, and a chiller control. And the water inlet of the evaporator is communicated with the water outlet of the chilled water pump. And the water outlet of the evaporator is communicated with a cold consumption device. The condenser is attached to the evaporator. And the water inlet of the condenser is communicated with the water outlet of the cooling water pump. And the water outlet of the condenser is communicated with the other end of the second pipeline. The evaporator, the condenser and the host system control device are respectively connected with the cold water unit control device.
In one embodiment, the water inlet of each freezing water pump is communicated with a water return pipe. The water outlet of each evaporator is communicated with a water supply pipe. The water return pipe and the water supply pipe are respectively communicated with the cold consumption device. The air-conditioning refrigeration machine room system further comprises a first pressure difference detection device. The first pressure difference detection device is arranged at the water inlet of the water return pipe and the water outlet of the water supply pipe. The first pressure difference detection device is connected with the central control device. The first pressure difference detection device is used for measuring the pressure difference of water supply and return and outputting the pressure difference of water supply and return to the central control device.
In one embodiment, the air-conditioning and refrigerating machine room system further comprises a first temperature difference and flow detection device. The first temperature difference and flow detection device is arranged at the water inlet and the water outlet of each evaporator. The first temperature difference and flow detection device is connected with the host system control device.
In one embodiment, the air-conditioning refrigeration machine room system further comprises a second pressure difference detection device. The second pressure difference detection device is arranged at the water inlet and the water outlet of each evaporator. The second pressure difference detection device is connected with the host system control device. The second pressure difference detection device is used for detecting the pressure difference of the water inlet and the water outlet of the evaporator and transmitting the pressure difference of the water inlet and the water outlet of the evaporator to the host system control device.
In one embodiment, the air-conditioning refrigeration machine room system further comprises a third pressure difference detection device. The third pressure difference detection device is arranged at the water inlet and the water outlet of each chilled water pump. The third pressure difference detection device is connected with the host system control device. The third pressure difference detection device is used for detecting the pressure difference of the water inlet and the water outlet of the chilled water pump and transmitting the pressure difference of the water inlet and the water outlet of the chilled water pump to the host system control device.
In one embodiment, the air-conditioning and refrigerating machine room system further comprises a second temperature difference and flow detection device. The second temperature difference and flow detection device is arranged at the water inlet and the water outlet of each condenser. The second temperature difference and flow detection device is connected with the host system control device. The second temperature difference and flow detection device is used for detecting the temperature difference and flow of the water inlet and the water outlet of the condenser and outputting the temperature difference and flow of the water inlet and the water outlet of the condenser to the host system control device.
In one embodiment, the air-conditioning refrigeration machine room system further comprises a fourth pressure difference detection device. The fourth pressure difference detection device is arranged at the water inlet and the water outlet of each condenser. The fourth pressure difference detection device is connected with the host system control device. The fourth pressure difference detection device is used for detecting the pressure difference of the water inlet and the water outlet of the condenser and transmitting the pressure difference of the water inlet and the water outlet of the condenser to the host system control device.
In one embodiment, the air-conditioning and refrigerating machine room system further comprises a temperature measuring device. The temperature measuring device is used for being arranged in an outdoor environment. The temperature measuring device is connected with the central control device. The temperature measuring device is used for measuring the outdoor temperature and transmitting the outdoor temperature to the central control device.
The air-conditioning refrigeration machine room system provided by the embodiment of the application comprises a plurality of host systems connected in parallel and a central control device. The host system comprises a cooling water pump, a water chilling unit and a freezing water pump which are communicated in sequence. The cooling water pump is used for circulating low-temperature water, and the freezing water pump is used for being communicated with the cold consumption device. The cooling water pump, the water chilling unit and the freezing water pump are respectively and electrically connected with the host system control device. And each host system control device is electrically connected with the central control device. The central control device controls the cooling water pump, the water chilling unit and the chilled water pump in the same host system to operate through the host system control device.
Each of the host systems includes one of the host system control devices. And the cooling water pump, the water chilling unit and the freezing water pump in the same host system are used as a module and are controlled by the host system control device. When the central control device is damaged, the host system control device can also independently control the operation of the cooling water pump, the water chilling unit and the chilled water pump. Air-conditioning refrigeration machine room system an air-conditioning refrigeration machine room system.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the air conditioning and refrigerating machine room system provided in an embodiment of the present application;
fig. 2 is an electrical connection diagram of the air conditioning and refrigerating machine room system provided in an embodiment of the present application.
Reference numerals:
10. an air-conditioning refrigeration machine room system; 20. a host system; 210. a cooling water pump; 220. a water chilling unit; 230. a chilled water pump; 240. a host system control device; 30. a central control device; 101. a first pipeline; 102. a second pipeline; 40. a cooling tower system; 50. a cooling tower control device; 410. a cooling tower; 420. a fan; 221. an evaporator; 222. a condenser; 223. a control device of the water cooling unit; 103. a water return pipe; 104. a water supply pipe; 110. a first differential pressure detecting device; 250. a first temperature differential and flow sensing device; 260. a second differential pressure detecting device; 270. a third differential pressure detecting device; 280. a second temperature difference and flow rate detecting means; 290. a fourth differential pressure detecting means; 60. a temperature measuring device.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.
The numbering of the components as such, e.g., "first", "second", etc., is used herein for the purpose of describing the objects only, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1 and 2, an air conditioning and refrigerating machine room system 10 includes a plurality of parallel-connected host systems 20 and a central control device 30. The host system 20 includes a cooling water pump 210, a chiller 220, a chilled water pump 230, and a host system control 240. The cooling water pump 210, the water chiller 220, and the chilled water pump 230 are sequentially communicated. The cooling water pump 210 is used to circulate low-temperature water. The chilled water pump 230 is used to communicate with a cold consumer. The cooling water pump 210, the water chiller 220, and the chilled water pump 230 are electrically connected to the host system control device 240, respectively.
Each of the host system control devices 240 is electrically connected to the central control device 30. The central control device 30 controls the operations of the cooling water pump 210, the water chiller 220, and the chilled water pump 230 in the same host system 20 through the host system control device 240.
In the air conditioning and refrigeration machine room system 10 provided in the embodiment of the present application, each of the host systems 20 includes one host system control device 240. The cooling water pump 210, the water chiller 220, and the chilled water pump 230 in the same host system 20 are controlled by the host system control device 240 as a module. When the central control device 30 is damaged, the main system control device 240 can also independently control the operations of the cooling water pump, the water chiller, and the chilled water pump.
In one embodiment, the host system control 240 is configured to obtain the status parameters of the chiller 220. The central control device 30 is configured to collect status parameters of the chiller units 220 and obtain an outdoor temperature and a target cooling capacity. The central control device 30 is configured to determine the outlet water temperature of the chilled water of each water chilling unit 220 according to the outdoor temperature. The central control device 30 is configured to automatically optimize according to the target refrigeration capacity, the outlet water temperature of the chilled water, and the state parameters of each water chilling unit 220, so as to obtain an optimal load factor of each water chilling unit 220, the host system 20 to be operated, and a chilled water flow rate of each host system 20 to be operated. The central control device 30 is further configured to obtain a water supply and return temperature, and control the frequencies of the chilled water pump 230 and the cooling water pump 210 according to the optimal load factor of the chiller 220, the water supply and return temperature, and the chilled water flow rate.
The air-conditioning and refrigerating machine room system 10 fully considers the optimal load rate of the water chilling unit 220 when adjusting the frequencies of the chilled water pump 230 and the cooling water pump 210, and avoids the problem that the water chilling unit 220 cannot operate at the optimal load rate due to the fact that the water chilling unit 220 is influenced by the power of the cooling water pump 210 and the chilled water pump 230. Therefore, the air conditioning and refrigeration machine room system 10 avoids the load distribution imbalance of the chiller unit 220.
In the air-conditioning refrigeration machine room system 10, the cooling water pump 210, the water chilling unit 220 and the chilled water pump 230 are connected in series to form a module, and a plurality of modules are connected in parallel to form a system mode. The air-conditioning refrigeration machine room system 10 can realize the differential optimization operation of the respective optimal load rates according to the energy-saving adjustment and the load adjustment of the different types of water chilling units 220, and obtain the optimal weighted energy efficiency ratio of the system.
In addition, the cooling water pump 210, the water chilling unit 220 and the freezing water pump 230 are connected in series to form a module, and a plurality of modules are connected in parallel to form a system mode, so that energy loss of water flow parallel connection and flow splitting links between the water chilling unit 220 and the freezing water pump 230 is avoided, and the overall energy efficiency ratio of the system is improved.
The cold consuming device comprises a fan coil. The host system 20 is used to provide chilled water to the fan coil. The fan coil is used for cooling indoors.
The outlet temperature of the chilled water of the water chiller 220 can be set by the central control device 30. The central control device 30 outputs the outlet water temperature of the chilled water of the water chilling unit 220 to the host system control device 240. The host system control device 240 automatically adjusts the operation state of the water chilling unit 220 according to the chilled water outlet temperature of the water chilling unit 220, and then adjusts the operation states of the cooling water pump 210 and the chilled water pump 230 according to the operation state of the water chilling unit 220.
The central control device 30 may obtain the target cooling capacity by measuring a return water temperature, a supply water temperature, and a total flow rate of the water supply system of the system. The total flow of the water supply system is the total flow of the water supply pipe 104.
The state parameters of the chiller 220 include a flow rate of the chiller 220, a power of the chiller 220, an evaporation temperature of the chiller 220, and a condensation temperature of the chiller 220.
The central control device 30 obtains the outdoor temperature through communication with the outside or through a temperature sensing device.
The central control device 30 may find the optimal load rate of each chiller unit 220 and the host system 20 that needs to operate when the target cooling capacity is met according to the chilled water outlet temperature and the state parameters of each chiller unit 220. When the host system 20 to be operated operates at the respective optimal load rate, the sum of the chilled water flow rates is equal to the total flow rate of the water supply system, and the sum of the heat exchange amounts is the target cooling amount.
The operating parameters of the host system 20 that need to be operated vary with the target cooling capacity and the outdoor temperature. When the target cooling capacity and the outdoor temperature change, the central control device 30 will automatically optimize and adjust the optimal load rate of the chiller 220, the main system 20 to be operated and the chilled water flow rate of each main system 20 to be operated.
The performance parameters of the plurality of chiller units 220 may be the same or different. The performance parameters of the plurality of cooling water pumps 210 may be the same or different. The performance parameters of the plurality of chilled water pumps 230 may be the same or different.
The optimal load rate of the chiller 220 is related to the performance parameters of the chiller 220 itself.
The energy efficiency ratio of the air conditioning and refrigeration machine room system 10 refers to the ratio of the amount of cooling provided to the energy consumed by the equipment itself. The higher the energy efficiency ratio, the more heat the chiller 220 absorbs by evaporation or the less electric power the compressor consumes, i.e., the less electric power consumed to obtain more cooling capacity.
The higher the frequency of the chilled water pump 230, the greater the flow rate. When the frozen water flow rate increases, the frequency of the frozen water pump 230 is increased.
The higher the frequency of the cooling water pump 210, the greater the flow rate. When the flow rate of the cooling water increases, the frequency of the cooling water pump 210 is increased.
Under the condition of constant flow rate, the larger the evaporation capacity of the water chilling unit 220 is, the lower the outlet water temperature of the water chilling unit 220 is.
The host system control device 240 and the central control device 30 each support remote control. When the host system control device 240 receives remote control, the state parameter information of the water chilling unit 220 can be independently and remotely transmitted to other upper computers or servers, and control commands of other upper computers or servers can be independently received, so that the cooling water pump 210, the water chilling unit 220 and the chilled water pump 230 can be independently controlled. The provision of the host system control means 240 improves the convenience of the control of the apparatus.
In one embodiment, the water inlet of each cooling water pump 210 is communicated with one end of the first pipeline 101, the cooling water outlet of each water chilling unit 220 is communicated with one end of the second pipeline 102, and the air-conditioning and refrigerating machine room system 10 further comprises a plurality of cooling towers 410 and a cooling tower control device 50 which are connected in parallel. The water outlet of each cooling tower system 40 is communicated with the other end of the first pipeline 101, and the water inlet of each cooling tower system 40 is communicated with the other end of the second pipeline 102. Each of the cooling tower systems 40 and the central control device 30 is electrically connected to the cooling tower control device 50. The cooling tower control device 50 is configured to obtain the target refrigeration capacity, the chilled water outlet temperature, the state parameters of the water chilling units 220, and the frequencies of the chilled water pumps 230 and the cooling water pumps 210, and adjust the number of the cooling tower systems 40 in operation according to the target refrigeration capacity, the chilled water outlet temperature, the state parameters of the water chilling units 220, and the frequencies of the chilled water pumps 230 and the cooling water pumps 210.
The cooling tower system 40 is used for cooling the water in the cooling water pump 210. The cooling water pump 210 and the cooling tower system 40 will realize self-adaptive automatic control according to the system running state. The control process may be the control of the number of the cooling tower system 40 in operation, or the control of the temperature of the water discharged from the cooling tower 410 system 40.
In one embodiment, the cooling tower system 40 includes a cooling tower 410 and a fan 420. The water outlet of the cooling tower 410 is communicated with the other end of the first pipeline 101, and the water inlet of the cooling tower 410 is communicated with the other end of the second pipeline 102. The fan 420 is used for cooling the water in the cooling tower 410. The fan 420 is electrically connected to the cooling tower control device 50.
Under the condition that the flow rate of the cooling tower 410 is not changed, the temperature of the cooling water can be adjusted by adjusting the frequency or the operation number of the fans 420.
The adjustment of the air conditioning and refrigeration machine room system 10 to the fan 420 and the cooling water pump 210 is adaptive adjustment on the premise of meeting the optimal load rate of the water chilling unit 220.
In one embodiment, the chiller 220 includes an evaporator 221, a condenser 222, and a chiller control 223. The water inlet of the evaporator 221 is communicated with the water outlet of the chilled water pump 230. The water outlet of the evaporator 221 is used for communicating with a cold consumption device. The condenser 222 is attached to the evaporator 221. The water inlet of the condenser 222 is communicated with the water outlet of the cooling water pump 210. The water outlet of the condenser 222 is communicated with the other end of the second pipeline 102. The evaporator 221, the condenser 222, and the host system control device 240 are respectively connected to the cold water unit control device 223. The host system control device 240 controls the evaporator 221 and the condenser 222 through the cold water unit control device 223.
The evaporator 221 and the chilled water pump 230 circulate chilled water. The condenser 222 and the cooling water pump 210 circulate cooling water. Heat exchange of the cooling water and the chilled water is achieved by the evaporator 221 and the condenser 222. The temperature of the cooling water after heat exchange is increased. The temperature of the chilled water after heat exchange is reduced.
In one embodiment, the water inlet of each of the freezing water pumps 230 is communicated with the water return pipe 103. The water outlet of each of the evaporators 221 is communicated with a water supply pipe 104. The water return pipe 103 and the water supply pipe 104 are respectively communicated with the cold consumption device. The air conditioning and refrigerating machine room system 10 further comprises a first pressure difference detection device 110. The first differential pressure detecting device 110 is disposed at a water inlet of the water return pipe 103 and a water outlet of the water supply pipe 104. The first differential pressure detection device 110 is connected to the central control device 30. The first pressure difference detecting device 110 is configured to measure a difference between supply and return water pressures, and output the difference between the supply and return water pressures to the central control device 30. The central control device 30 monitors the difference between the supply pressure and the return pressure of the freezing water pipeline through the first pressure difference detection device 110 to monitor the blockage condition of the pipeline, so as to improve the safety of the air-conditioning and refrigerating machine room system 10. However, when the pressure difference between the supplied water and the returned water is greater than a set value, the pipeline needs to be cleaned.
In one embodiment, the air conditioning and refrigeration machine room system 10 further comprises a first temperature difference and flow detection device 250. The first temperature difference and flow rate detecting means 250 is provided at the water inlet and outlet of each of the evaporators 221. The first temperature difference and flow rate detecting device 250 is connected to the host system control device 240. The first temperature difference and flow rate detecting device 250 is configured to detect a temperature difference and a flow rate of the water inlet and the water outlet of the evaporator 221, and output the temperature difference and the flow rate of the water inlet and the water outlet of the evaporator 221 to the host system control device 240.
The host system control device 240 outputs the temperature difference and the flow rate of the water inlet and the water outlet of the evaporator 221 to the central control device 30. The temperature difference and the flow of the water inlet and the water outlet of the evaporator 221 are monitored, so that the evaporator 221 can be fed back and adjusted in time, and the water chilling unit 220 can operate at the optimal load rate.
In one embodiment, the air conditioning and refrigeration machine room system 10 further comprises a second pressure difference detection device 260. The second differential pressure detecting means 260 is provided at the water inlet and outlet of each of the evaporators 221. The second differential pressure detection device 260 is connected to the host system control device 240. The second differential pressure detection device 260 is configured to detect a differential pressure of the water inlet and the water outlet of the evaporator 221, and transmit the differential pressure of the water inlet and the water outlet of the evaporator 221 to the host system control device 240.
In addition, by monitoring the change of the pressure difference of the water inlet and the water outlet of the evaporator 221, the running state of the water chilling unit 220 can be known, and the safety is improved. If the pressure difference between the water inlet and the water outlet of the evaporator 221 exceeds a set value, the evaporator 221 is in fault or the pipeline system is in fault, and maintenance is needed.
In one embodiment, the air conditioning and refrigeration machine room system 10 further comprises a third pressure difference detection device 270. The third differential pressure detecting means 270 is provided at the water inlet and the water outlet of each of the chilled water pumps 230. The third differential pressure detection device 270 is connected to the host system control device 240. The third differential pressure detecting device 270 is configured to detect a differential pressure between the water inlet and the water outlet of the chilled water pump 230, and transmit the differential pressure between the water inlet and the water outlet of the chilled water pump 230 to the host system control device 240.
By monitoring the pressure difference of the water inlet and the water outlet of the chilled water pump 230, the running state of the chilled water pump 230 is known, and equipment faults are found in time.
In one embodiment, the air conditioning and refrigeration machine room system 10 further comprises a second temperature difference and flow detection device 280. The second temperature difference and flow rate detecting means 280 is provided at the water inlet and outlet of each of the condensers 222. The second temperature difference and flow rate detecting device 280 is connected to the host system control device 240. The second temperature difference and flow rate detecting device 280 is configured to detect the temperature difference and the flow rate of the water inlet and the water outlet of the condenser 222, and output the temperature difference and the flow rate of the water inlet and the water outlet of the condenser 222 to the host system control device 240.
The host system control device 240 outputs the temperature difference and the flow rate of the water inlet and the water outlet of the condenser 222 to the central control device 30. The feedback adjustment of the condenser 222 can be performed in time by monitoring the temperature difference and the flow rate of the water inlet and the water outlet of the condenser 222, so that the water chilling unit 220 operates at the optimal load rate.
In one embodiment, the air conditioning and refrigeration machine room system 10 further comprises a fourth pressure difference detection device 290. The fourth differential pressure detecting means 290 is provided at the water inlet and the water outlet of each of the condensers 222. The fourth differential pressure detection device 290 is connected to the host system control device 240. The fourth differential pressure detecting device 290 is configured to detect a differential pressure between the water inlet and the water outlet of the condenser 222, and transmit the differential pressure between the water inlet and the water outlet of the condenser 222 to the host system control device 240.
By monitoring the pressure difference of the water inlet and the water outlet of the condenser 222, the running state of the condenser 222 is known, and equipment faults are found in time.
In one embodiment, the air conditioning and refrigeration machine room system 10 further comprises a temperature measuring device 60. The temperature measuring device 60 is adapted to be disposed in an outdoor environment. The temperature measuring device 60 is connected to the central control device 30. The temperature measuring device 60 is used to measure the outdoor temperature and transmit the outdoor temperature to the central control device 30.
The embodiment of the application provides a control method for an air-conditioning refrigeration machine room system 10, and the air-conditioning refrigeration machine room system 10 comprises a plurality of host systems 20 connected in parallel. The host system 20 includes a cooling water pump 210, a water chiller 220 and a chilled water pump 230, which are connected in series. The cooling water pump 210 is used to circulate low-temperature water. The chilled water pump 230 is used to communicate with a cold consumer. The control method of the air-conditioning and refrigerating machine room system 10 comprises the following steps:
the chilled water outlet temperature of each chiller 220 is set according to the outdoor temperature. And acquiring target refrigerating capacity and state parameters of each water chilling unit 220. And automatically optimizing according to the target refrigerating capacity, the outlet water temperature of the chilled water and the state parameters of the water chilling units 220 to obtain the optimal load rate of the water chilling units 220, the host system 20 required to operate and the chilled water flow of the host system 20 required to operate. And acquiring the temperature of the supplied and returned water. And controlling the frequency of each freezing water pump 230 and the cooling water pump 210 according to the optimal load rate of the water chilling unit 220, the temperature of the supplied and returned water and the flow rate of the frozen water.
The control method of the air-conditioning and refrigerating machine room system 10 fully considers the optimal load rate of the water chilling unit 220 when adjusting the frequencies of the chilled water pump 230 and the cooling water pump 210, and avoids the problem that the water chilling unit 220 cannot operate at the optimal load rate due to the fact that the water chilling unit 220 is influenced by the power of the cooling water pump 210 and the chilled water pump 230. Therefore, the air conditioning and refrigeration machine room system 10 avoids the load distribution imbalance of the chiller unit 220.
The operating parameters of the host system 20 to be operated are varied with the target cooling capacity and the outdoor temperature. When the target cooling capacity and the outdoor temperature change, the central control device 30 will automatically optimize and adjust the optimal load rate of the chiller 220, the main system 20 to be operated and the chilled water flow rate of each main system 20 to be operated.
In the air-conditioning refrigeration machine room system 10, the cooling water pump 210, the water chilling unit 220 and the chilled water pump 230 are connected in series to form a module, and a plurality of modules are connected in parallel to form a system mode. The air-conditioning refrigeration machine room system 10 can realize the differential optimization operation of the respective optimal load rates according to the energy-saving adjustment and the load adjustment of the different types of water chilling units 220, and obtain the optimal weighted energy efficiency ratio of the system.
In addition, the cooling water pump 210, the water chilling unit 220 and the freezing water pump 230 are connected in series to form a module, and a plurality of modules are connected in parallel to form a system mode, so that energy loss of water flow parallel connection and flow splitting links between the water chilling unit 220 and the freezing water pump 230 is avoided, and the overall energy efficiency ratio of the system is improved.
In one embodiment, the air conditioning and refrigeration machine room system 10 further includes a plurality of parallel cooling tower 410 systems 40. The cooling tower system 40 is in communication with the host system 20. The control method further comprises the following steps:
controlling the number of the cooling tower systems 40 according to the target cooling capacity of the host system 20, the outlet water temperature of the chilled water, the state parameters of the plurality of water chilling units 220, the frequency of the chilled water pump 230, and the frequency of the cooling water pump 210.
The cooling tower system 40 is used for cooling the water in the cooling water pump 210. The cooling water pump 210 and the cooling tower system 40 will realize self-adaptive automatic control according to the system running state.
In one embodiment, the control method further comprises: controlling the outlet water temperature of the cooling tower system 40 according to the target cooling capacity of the host system 20, the outlet water temperature of the chilled water, the state parameters of the plurality of water chilling units 220, the frequency of the chilled water pump 230 and the frequency of the cooling water pump 210 which need to operate.
In one embodiment, the water chilling unit 220 includes an evaporator 221 and a condenser 222, a water inlet of the evaporator 221 is communicated with a water outlet of the chilled water pump 230, a water outlet of the evaporator 221 is used for being communicated with a cold consumption device, the condenser 222 is attached to the evaporator 221, a water inlet of the condenser 222 is communicated with a water outlet of the cooling water pump 210, a water outlet of the condenser 222 is communicated with the cooling tower system 40, and the control method further includes:
acquiring the pressure of supply and return water, the temperature difference and flow of the water inlet and outlet of the evaporator 221, the pressure difference of the water inlet and outlet of the chilled water pump 230, the temperature difference and flow of the water inlet and outlet of the condenser 222, the pressure difference of the water inlet and outlet of the condenser 222 and the pressure difference of the water inlet and outlet of the cooling water pump 210, and performing feedback adjustment on the number of the host systems 20 to be operated. The control method carries out feedback adjustment by monitoring the operating conditions of all components to ensure that the host system 20 operates at the optimal load rate, thereby avoiding the load distribution disorder of the water chilling unit 220.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-described examples merely represent several embodiments of the present application and are not to be construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An air conditioning and refrigeration machine room system, comprising:
a plurality of parallel connected host systems, the host systems comprising:
the cooling water pump, the water chilling unit and the freezing water pump are communicated in sequence, the cooling water pump is used for circulating low-temperature water, and the freezing water pump is used for being communicated with the cold consumption device;
the cooling water pump, the water chilling unit and the freezing water pump are respectively and electrically connected with the host system control device;
and each host system control device is electrically connected with the central control device, and the central control device controls the cooling water pump, the water chilling unit and the chilled water pump in the same host system to operate through the host system control devices.
2. The air conditioning and refrigerating machine room system according to claim 1, wherein a water inlet of each of the cooling water pumps is communicated with one end of a first pipeline, and a cooling water outlet of each of the chiller units is communicated with one end of a second pipeline, the air conditioning and refrigerating machine room system further comprising:
the water outlet of each cooling tower system is communicated with the other end of the first pipeline, and the water inlet of each cooling tower system is communicated with the other end of the second pipeline;
and each cooling tower system and the central control device are respectively and electrically connected with the cooling tower control device, and the central control device adjusts the running number of the cooling tower systems through the cooling tower control devices.
3. An air conditioning and refrigeration machine room system as recited in claim 2 wherein said cooling tower system comprises:
a water outlet of the cooling tower is communicated with the other end of the first pipeline, and a water inlet of the cooling tower is communicated with the other end of the second pipeline;
and the fan is used for cooling the water in the cooling tower and electrically connected with the cooling tower control device.
4. An air conditioning and refrigeration machine room system according to claim 3, wherein said chiller comprises:
the water inlet of the evaporator is communicated with the water outlet of the chilled water pump, and the water outlet of the evaporator is communicated with a cold consumption device;
the condenser is attached to the evaporator, a water inlet of the condenser is communicated with a water outlet of the cooling water pump, and a water outlet of the condenser is communicated with the other end of the second pipeline;
the evaporator, the condenser and the host system control device are respectively connected with the cooling water unit control device.
5. An air conditioning and refrigerating machine room system according to claim 4, wherein a water inlet of each of said refrigerating water pumps is communicated with a water return pipe, a water outlet of each of said evaporators is communicated with a water supply pipe, and said water return pipe and said water supply pipe are respectively communicated with said cooling consuming device, said air conditioning and refrigerating machine room system further comprising:
the first pressure difference detection device is arranged at the water inlet of the water return pipe and the water outlet of the water supply pipe, connected with the central control device and used for measuring the pressure difference of water supply and return and outputting the pressure difference of water supply and return to the central control device.
6. An air conditioning and refrigeration machine room system according to claim 4, further comprising:
the first temperature difference and flow detection device is arranged at each water inlet and outlet of the evaporator, the first temperature difference and flow detection device is connected with the host system control device, and the first temperature difference and flow detection device is used for detecting the temperature difference and flow of the water inlet and outlet of the evaporator and outputting the temperature difference and flow of the water inlet and outlet of the evaporator to the host system control device.
7. An air conditioning and refrigeration machine room system according to claim 4, further comprising:
and the second pressure difference detection device is arranged at the water inlet and the water outlet of each evaporator, is connected with the host system control device, and is used for detecting the pressure difference of the water inlet and the water outlet of each evaporator and transmitting the pressure difference of the water inlet and the water outlet of each evaporator to the host system control device.
8. An air conditioning and refrigeration machine room system according to claim 4, further comprising:
and the third pressure difference detection device is arranged at the water inlet and the water outlet of each chilled water pump, is connected with the host system control device, and is used for detecting the pressure difference of the water inlet and the water outlet of each chilled water pump and transmitting the pressure difference of the water inlet and the water outlet of each chilled water pump to the host system control device.
9. An air conditioning and refrigeration machine room system according to claim 4, further comprising:
the second difference in temperature and flow detection device sets up in every the inlet outlet of condenser, second difference in temperature and flow detection device with host system controlling means connects, second difference in temperature and flow detection device are used for detecting the difference in temperature and the flow of the inlet outlet of condenser, and will the difference in temperature and the flow of the inlet outlet of condenser are exported for host system controlling means.
10. An air conditioning and refrigeration machine room system according to claim 4, further comprising:
the fourth pressure difference detection device is arranged at the water inlet and the water outlet of each condenser, is connected with the host system control device and is used for detecting the pressure difference of the water inlet and the water outlet of each condenser and transmitting the pressure difference of the water inlet and the water outlet of each condenser to the host system control device;
the temperature measuring device is used for being arranged in an outdoor environment and connected with the central control device, and the temperature measuring device is used for measuring outdoor temperature and transmitting the outdoor temperature to the central control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021627481.6U CN212457242U (en) | 2020-08-07 | 2020-08-07 | Air-conditioning refrigeration machine room system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021627481.6U CN212457242U (en) | 2020-08-07 | 2020-08-07 | Air-conditioning refrigeration machine room system |
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| Publication Number | Publication Date |
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| CN212457242U true CN212457242U (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021627481.6U Active CN212457242U (en) | 2020-08-07 | 2020-08-07 | Air-conditioning refrigeration machine room system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212457242U (en) |
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2020
- 2020-08-07 CN CN202021627481.6U patent/CN212457242U/en active Active
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