CN111765680A - An ice-making system control strategy and system - Google Patents
An ice-making system control strategy and system Download PDFInfo
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- CN111765680A CN111765680A CN202010495042.2A CN202010495042A CN111765680A CN 111765680 A CN111765680 A CN 111765680A CN 202010495042 A CN202010495042 A CN 202010495042A CN 111765680 A CN111765680 A CN 111765680A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C1/00—Producing ice
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C2500/00—Problems to be solved
- F25C2500/08—Sticking or clogging of ice
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
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Abstract
本发明公开了一种制冰系统控制策略及系统,将其分为待机状态、启动状态、运行状态、停机状态,并设计如下步骤:判断系统是否处于待机状态且满足制冰启动条件;执行制冰启动子程序,之后标记为运行状态并进入,若满足制冰停止条件则进入;判断是否满足制冰停止条件;判读是否堵塞;判断是否满足促晶运行条件;执行促晶子程序,之后进入,若满足堵塞条件则进入;执行解冻子程序,之后进入,若满足制冰停止条件则进入;执行制冰停止子程序,之后标记为待机状态并进入。本发明可以有效减少制冰运行过程制冰回路的堵冰现象、缩短制冰时间并降低设备能耗,从而在满足用户用冷需求的基础上,实现制冰系统的安全、连续、高效运行。
The invention discloses a control strategy and system for an ice making system, which is divided into a standby state, a start state, a running state and a stop state. Ice start subroutine, then mark it as running state and enter, if the ice making stop condition is met, enter; judge whether the ice making stop condition is met; interpret whether it is blocked; judge whether the crystal promoting operation condition is met; execute the crystal promoting subroutine, and then enter, If the blockage condition is met, enter; execute the defrosting subroutine, then enter; if the ice making stop condition is met, enter; execute the ice making stop subroutine, and then mark the standby state and enter. The invention can effectively reduce the ice blocking phenomenon of the ice-making circuit during the ice-making operation, shorten the ice-making time and reduce the energy consumption of the equipment, thereby realizing the safe, continuous and efficient operation of the ice-making system on the basis of satisfying the cooling demand of users.
Description
技术领域technical field
本发明涉及制冰技术领域,特别涉及一种制冰系统控制策略及系统。The invention relates to the technical field of ice making, in particular to an ice making system control strategy and system.
背景技术Background technique
集中式中央空调是城市大型建筑不可缺少的部分,随着近年来空调系统耗电量的逐年增大,节能成为空调行业重点关注的问题。采用蓄冷系统,通过在夜间电力低谷时段蓄冷,在白天电力高峰时段释冷,可以减少空调制冷机组在用电高峰期的耗能,一方面实现了电力的移峰填谷,另一方面可以利用峰谷电价差节约空调整体运行费用,带来经济效益。其中,动态冰浆制取技术通过流动冰的方式,解决了传统蓄冷系统占地空间大、效率低等缺陷,成为目前蓄冷技术的主流发展方向。Centralized central air conditioning is an indispensable part of large urban buildings. With the increasing power consumption of air conditioning systems in recent years, energy saving has become a key concern of the air conditioning industry. The cold storage system is adopted, which can reduce the energy consumption of the air conditioning and refrigeration units during the peak period of power consumption by storing cold during the low power period at night and releasing the cold during the peak power period during the day. The peak-valley electricity price difference saves the overall operating cost of the air conditioner and brings economic benefits. Among them, the dynamic ice slurry production technology solves the shortcomings of the traditional cold storage system such as large space and low efficiency by means of flowing ice, and has become the mainstream development direction of the current cold storage technology.
动态冰浆制取系统运行工况复杂,自动化要求较高,需要系统实现自动判断,如基于用户设定的制冰启动、基于故障或者完成制冰需求的系统停机等;同时,系统运行过程包含堵塞判断、促晶、解冻等工作模式,需要根据系统实时状态开启不同设备以实现相应的功能,从而保证系统的安全、连续、高效运行。The operating conditions of the dynamic ice slurry making system are complex, and the automation requirements are high, which requires the system to realize automatic judgment, such as ice making startup based on user settings, system shutdown based on faults or completion of ice making requirements, etc. At the same time, the system operation process includes: In the working modes such as clogging judgment, crystallization promotion, and thawing, different devices need to be turned on according to the real-time status of the system to realize the corresponding functions, so as to ensure the safe, continuous and efficient operation of the system.
发明内容SUMMARY OF THE INVENTION
针对现有技术中的不足,本发明提供一种制冰系统控制策略及系统,以提高系统运行的稳定性和可靠性。In view of the deficiencies in the prior art, the present invention provides an ice making system control strategy and system to improve the stability and reliability of the system operation.
为实现上述目的,本发明的技术方案如下:For achieving the above object, technical scheme of the present invention is as follows:
一种制冰系统控制策略,制冰系统的运行工况至少包括待机状态、启动状态、运行状态和停机状态,所述制冰系统至少包括压缩机、制冰泵、载冷剂泵、冷凝风扇、促晶器和四通阀,所述控制策略包括以下步骤:An ice-making system control strategy, the operating conditions of the ice-making system at least include a standby state, a start-up state, a running state and a shutdown state, and the ice-making system at least includes a compressor, an ice-making pump, a coolant pump, and a condensing fan , crystal promoter and four-way valve, the control strategy includes the following steps:
S1:判断制冰系统是否处于待机状态且同时满足制冰启动条件,若是,标记为运行状态并执行S2,若不是,则循环执行S1;S1: Determine whether the ice making system is in the standby state and meet the ice making start conditions at the same time, if so, mark it as running state and execute S2, if not, execute S1 cyclically;
S2:执行制冰启动子程序,待所述制冰启动子程序执行完毕之后,标记为运行状态并执行S3,若所述制冰启动子程序执行期间满足制冰停止条件,则标记为停机状态并执行S8;S2: Execute the ice making start subroutine, after the ice making start subroutine is executed, mark it as running state and execute S3, if the ice making stop condition is met during the execution of the ice making start subroutine, mark it as the shutdown state and execute S8;
S3:判断制冰系统是否满足制冰停止条件,若满足,则标记为停机状态并执行S8,若不满足,执行S4;S3: determine whether the ice making system meets the ice making stop condition, if so, mark it as a shutdown state and execute S8, if not, execute S4;
S4:判断制冰系统是否堵塞,若未堵塞则执行S5,若堵塞则执行S7;S4: determine whether the ice making system is blocked, if not, execute S5, and if it is blocked, execute S7;
S5:判断制冰系统是否满足促晶运行条件,若满足则执行S6,若不满足则执行S3;S5: judge whether the ice making system satisfies the crystal promoting operation conditions, if so, execute S6, if not, execute S3;
S6:执行促晶子程序,待所述促晶子程序执行完毕之后,执行S3,若所述促晶子程序执行期间制冰系统堵塞,则执行S7;S6: Execute the crystallization promotion subroutine, after the crystallization promotion subroutine is executed, execute S3, and if the ice making system is blocked during the execution of the crystallization promotion subroutine, execute S7;
S7:执行解冻子程序,待所述解冻子程序执行完毕之后,执行S3,若所述解冻子程序执行期间制冰系统满足制冰停止条件,则标记为停机状态并执行S8;S7: Execute the thawing subroutine, after the thawing subroutine is executed, execute S3, if the ice making system meets the ice making stop condition during the execution of the thawing subroutine, mark it as a shutdown state and execute S8;
S8:执行制冰停止子程序,待所述制冰停止子程序执行完毕之后,标记为待机状态并回到S1。S8: Execute the ice-making stop subroutine, and after the ice-making stop subroutine is completed, mark it as a standby state and return to S1.
如上所述的制冰系统控制策略,进一步地,所述待机状态为所述制冰系统的所有设备处于接通电源且等待触发信号的状态;所述启动状态为所述制冰系统的各个设备处于按设定顺序启动的过程,所述制冰启动子程序为载冷剂泵、冷凝风扇、制冰泵、压缩机按设定顺序及时间间隔先后启动。In the above ice making system control strategy, further, the standby state is a state in which all devices of the ice making system are powered on and waiting for a trigger signal; the startup state is each device of the ice making system In the process of starting according to the set order, the ice making starting subroutine is that the refrigerant pump, the condensing fan, the ice making pump, and the compressor start successively according to the set order and time interval.
如上所述的制冰系统控制策略,进一步地,所述运行状态为所述制冰系统进行制冰运行的过程,所述停机状态为所述制冰系统的各个设备处于按设定顺序关闭的过程,其中,所述运行状态包括进行堵塞判断、进行促晶运行条件判断、执行促晶子程序和执行解冻子程序;所述制冰停止子程序为压缩机、冷凝风扇、载冷剂泵、制冰泵、促晶器、四通阀设定顺序及时间间隔先后关闭。In the ice-making system control strategy as described above, further, the operating state is a process in which the ice-making system performs ice-making operation, and the shutdown state is that each device of the ice-making system is shut down in a set order. process, wherein the operating state includes judging clogging, judging crystallization-promoting operating conditions, executing crystallization-promoting subroutines, and executing thawing subroutines; The setting sequence and time interval of the ice pump, crystal promoter and four-way valve are closed successively.
如上所述的制冰系统控制策略,进一步地,所述制冰启动条件为所述制冰系统的当前制冰量低于设定值时接受制冰启动的触发信号。In the above-mentioned ice making system control strategy, further, the ice making starting condition is that the ice making starting trigger signal is accepted when the current ice making amount of the ice making system is lower than the set value.
如上所述的制冰系统控制策略,进一步地,制冰系统是否堵塞的判断方法为:通过所述制冰系统的制冷泵的出口的流量和压力进行判断,若流量和压力大于设定值,冰蓄冷系统未堵塞;若流量或者压力小于设定值,则此时制冰系统堵塞。In the above-mentioned ice making system control strategy, further, the method for judging whether the ice making system is blocked is: judged by the flow rate and pressure of the outlet of the refrigeration pump of the ice making system, if the flow rate and pressure are greater than the set value, The ice storage system is not blocked; if the flow or pressure is less than the set value, the ice making system is blocked at this time.
如上所述的制冰系统控制策略,进一步地,所述促晶运行条件为所述制冰系统的制冰泵所在回路的过冷水经过换热板换后的温度低于某一设定值Tset,且设定值Tset处于设定区间Tset∈(Tmin,Tmax)。In the ice-making system control strategy as described above, further, the crystallization-promoting operating condition is that the temperature of the supercooled water in the circuit where the ice-making pump of the ice-making system is located after being exchanged by the heat exchange plate is lower than a certain set value T set , and the set value T set is in the set interval T set ∈(T min , T max ).
如上所述的制冰系统控制策略,进一步地,所述制冰停止条件为获得制冰停止的触发信号、或者解冻子程序执行次数达到设定上限值。In the above-mentioned ice making system control strategy, further, the ice making stop condition is to obtain a trigger signal for stopping ice making, or the execution times of the defrosting subroutine reach a set upper limit.
如上所述的制冰系统控制策略,进一步地,所述促晶子程序为在满足所述促晶运行条件下,促晶器根据设定时长开启并运行。In the control strategy of the ice-making system as described above, further, the crystal promoting subroutine is to enable the crystal promoting device to start and run according to the set time period under the condition that the crystal promoting operation condition is satisfied.
如上所述的制冰系统控制策略,进一步地,所述解冻子程序为先关闭制冰泵,然后开启四通阀且开启四通阀根据设定时长进行运行,随后关闭四通阀并重新开启制冰泵。The ice-making system control strategy as described above, further, the defrosting subroutine is to first close the ice-making pump, then open the four-way valve and open the four-way valve to run according to the set time period, and then close the four-way valve and reopen it. Ice pump.
一种制冰系统,其利用如上任一所述的制冰系统控制策略,所述系统包括压缩机、制冰泵、载冷剂泵、蒸发板、冷凝风扇、促晶器和四通阀;An ice-making system, which utilizes the ice-making system control strategy described above, the system comprising a compressor, an ice-making pump, a refrigerant pump, an evaporating plate, a condensing fan, a crystallizer, and a four-way valve;
所述压缩机的高压出口连接所述四通阀入口且所述压缩机的低压入口连接所述四通阀出口,以实现气体压缩;The high-pressure outlet of the compressor is connected to the four-way valve inlet and the low-pressure inlet of the compressor is connected to the four-way valve outlet, so as to realize gas compression;
所述冷凝风扇的一端和所述蒸发板换的一端通过膨胀阀连接,所述冷凝风扇的另一端连接至所述四通阀的常开口,所述蒸发板换的另一端连接至所述四通阀的常闭口,其中,所述四通阀的通断电用于对常开口和常闭口进行转换,以改变气体流动方向实现工况的切换,所述四通阀断电时为制冷工况,通电时为制热工况;One end of the condensing fan and one end of the evaporating plate are connected through an expansion valve, the other end of the condensing fan is connected to the normal opening of the four-way valve, and the other end of the evaporating plate is connected to the four-way valve. The normally closed port of the through valve, wherein the on-off of the four-way valve is used to convert the normally open port and the normally closed port to change the gas flow direction to realize the switching of working conditions. When the power is turned on, it is the heating condition;
所述载冷剂泵通过管道与蒸发板换、过冷板换连接形成载冷剂回路,以实现载冷剂的流动;The refrigerant carrier pump is connected with the evaporating plate and the subcooling plate through the pipeline to form a refrigerant circuit, so as to realize the flow of the refrigerant;
所述制冰泵通过管道与所述促晶器、过冷板换连接形成制冰回路,以实现冰浆和水的流动。The ice making pump is connected with the crystal promoter and the subcooling plate through pipes to form an ice making circuit, so as to realize the flow of ice slurry and water.
本发明与现有技术相比,其有益效果在于:针对制冰系统的多种运行工况,将其分为待机状态、启动状态、运行状态、停机状态,通过合理的判断条件和跳转流程,结合不同工作模式和不同功能对应开启的设备,设计了一种制冰系统的自动运行控制策略,可以有效减少制冰运行过程制冰回路的堵冰现象、缩短制冰时间并降低设备能耗,从而在满足用户用冷需求的基础上,实现制冰系统的安全、连续、高效运行。Compared with the prior art, the present invention has the beneficial effect that: according to the various operating conditions of the ice making system, it is divided into a standby state, a startup state, a running state and a shutdown state, and through reasonable judgment conditions and jumping processes , Combined with different working modes and different functions of the corresponding equipment, an automatic operation control strategy of the ice making system is designed, which can effectively reduce the ice blocking phenomenon of the ice making circuit during the ice making operation, shorten the ice making time and reduce the energy consumption of the equipment , so as to realize the safe, continuous and efficient operation of the ice-making system on the basis of meeting the cooling needs of users.
附图说明Description of drawings
图1是本发明的制冰系统控制策略的流程图。FIG. 1 is a flow chart of the ice making system control strategy of the present invention.
具体实施方式Detailed ways
下面结合附图和具体实施方式对本发明的内容做进一步详细说明。The content of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
实施例:Example:
如图1所示,一种制冰系统控制策略,包括以下步骤:As shown in Figure 1, an ice-making system control strategy includes the following steps:
a、若制冰系统处于待机状态、且满足制冰启动条件,则标记为启动状态并进入步骤b,反之循环执行步骤a;其中,所述待机状态为所述制冰系统的所有设备处于接通电源且等待触发信号的状态;所述制冰启动条件为所述制冰系统的当前制冰量低于设定值时接受制冰启动的触发信号;所述启动状态为所述制冰系统的各个设备处于按设定顺序启动的过程。a. If the ice-making system is in a standby state and the conditions for starting ice-making are met, mark it as a start-up state and go to step b, otherwise, perform step a in a loop; wherein, the standby state is that all the devices of the ice-making system are in the connected state. The state of being powered on and waiting for a trigger signal; the ice making start condition is that the ice making system accepts the trigger signal for starting ice making when the current ice making amount of the ice making system is lower than the set value; the starting state is the ice making system of each device is in the process of starting up in a set order.
b、执行制冰启动子程序,执行完制冰启动子程序之后,标记为运行状态并进入步骤c;若期间满足制冰停止条件,则标记为停机状态并进入步骤h;所述制冰启动子程序为载冷剂泵、冷凝风扇、制冰泵、压缩机按设定顺序及时间间隔先后启动;所述制冰停止条件为获得制冰停止的触发信号、或者解冻子程序执行次数达到设定上限值;所述运行状态为所述制冰系统进行制冰运行的过程;所述停机状态为所述制冰系统的各个设备处于按设定顺序关闭的过程。b. Execute the ice-making start subroutine. After the ice-making start-up subroutine is executed, mark it as a running state and enter step c; if the ice making stop condition is met during the period, mark it as a stop state and enter step h; the ice making start The subroutine is that the refrigerant pump, the condensing fan, the ice making pump and the compressor are started successively in the set order and time interval; the ice making stop condition is to obtain the trigger signal for stopping the ice making, or the execution times of the defrosting subroutine reach the set time. The operating state is a process in which the ice-making system performs ice-making operation; and the shutdown state is a process in which each device of the ice-making system is shut down in a set order.
c、判断制冰系统是否满足制冰停止条件,若满足则标记为停机状态并进入步骤h,反之则进入步骤d;所述制冰停止条件为获得制冰停止的触发信号、或者解冻子程序执行次数达到设定上限值;所述停机状态为所述制冰系统的各个设备处于按设定顺序关闭的过程。c. Determine whether the ice-making system meets the ice-making stop condition, if so, mark it as a shutdown state and go to step h; otherwise, go to step d; the ice-making stop condition is to obtain a trigger signal for ice-making stop, or a thawing subroutine The number of executions reaches a set upper limit value; the shutdown state is a process in which each device of the ice making system is shut down in a set order.
d、判断制冰系统是否堵塞,若未堵塞则进入步骤e,反之则进入步骤g;制冰系统是否堵塞的判断方法为:通过所述制冰系统的制冷泵的出口的流量和压力进行判断,若流量和压力大于设定值,冰蓄冷系统未堵塞;若流量或者压力小于设定值,则此时制冰系统堵塞。d. Judging whether the ice making system is blocked, if not, go to step e, otherwise, go to step g; the method for judging whether the ice making system is blocked is: Judging by the flow and pressure of the outlet of the refrigeration pump of the ice making system , if the flow and pressure are greater than the set value, the ice storage system is not blocked; if the flow or pressure is less than the set value, the ice making system is blocked at this time.
e、判断制冰系统是否满足促晶运行条件,若满足则进入步骤f,反之则进入步骤c;所述促晶运行条件为所述制冰系统的制冰泵所在回路的过冷水经过换热板换后的温度低于某一设定值Tset,且设定值Tset处于设定区间Tset∈(Tmin,Tmax)。e. Determine whether the ice-making system meets the crystal-promoting operation conditions, and if so, go to step f; otherwise, go to step c; The temperature after the plate replacement is lower than a certain set value T set , and the set value T set is in the set interval T set ∈(T min , T max ).
f、执行促晶子程序,执行完促晶子程序之后,进入步骤c;若期间判断制冰系统堵塞,则进入步骤g;所述促晶子程序为在满足所述促晶运行条件下,促晶器根据设定时长开启并运行;制冰系统是否堵塞的判断方法为:通过所述制冰系统的制冷泵的出口的流量和压力进行判断,若流量和压力大于设定值,冰蓄冷系统未堵塞;若流量或者压力小于设定值,则此时制冰系统堵塞。f. Execute the crystal promoting subroutine. After the crystal promoting subroutine is executed, go to step c; if it is judged that the ice making system is blocked during the period, go to step g; Turn on and run according to the set time; the method of judging whether the ice making system is blocked is: Judging by the flow and pressure of the outlet of the refrigeration pump of the ice making system, if the flow and pressure are greater than the set value, the ice storage system is not blocked ; If the flow or pressure is less than the set value, the ice making system is blocked at this time.
g、执行解冻子程序,执行完解冻子程序之后,进入步骤c;若期间判断制冰系统满足制冰停止条件,则标记为停机状态并进入步骤h;所述解冻子程序为先关闭制冰泵,然后开启四通阀且开启四通阀根据设定时长进行运行,随后关闭四通阀并重新开启制冰泵;所述制冰停止条件为获得制冰停止的触发信号、或者解冻子程序执行次数达到设定上限值;所述停机状态为所述制冰系统的各个设备处于按设定顺序关闭的过程。g. Execute the thawing subroutine, and after executing the thawing subroutine, go to step c; if it is judged that the ice making system meets the ice making stop condition during the period, mark it as a shutdown state and enter step h; the thawing subroutine is to first turn off the ice making pump, then open the four-way valve and open the four-way valve to run according to the set time period, then close the four-way valve and restart the ice-making pump; the ice-making stop condition is to obtain the trigger signal of ice-making stop, or the defrosting subroutine The number of executions reaches a set upper limit value; the shutdown state is a process in which each device of the ice making system is shut down in a set order.
h、执行制冰停止子程序,执行完制冰停止子程序之后,标记为待机状态并进入步骤a。所述制冰停止子程序为压缩机、冷凝风扇、载冷剂泵、制冰泵、促晶器、四通阀设定顺序及时间间隔先后关闭;所述待机状态为所述制冰系统的所有设备处于接通电源且等待触发信号的状态。h. Execute the ice-making stop subroutine. After the ice-making stop subroutine is executed, mark it as a standby state and enter step a. The ice-making stop subroutine is that the compressor, the condensing fan, the refrigerant pump, the ice-making pump, the crystallizer, and the four-way valve are set in sequence and the time interval is closed successively; the standby state is the ice-making system. All devices are powered on and waiting for a trigger signal.
本实施例中,制冰系统控制策略可实施于常规的制冰机中,常规的制冰机一般包括压缩机、制冰泵、载冷剂泵、冷凝风扇、促晶器和四通阀,也可使用本发明另一方案提供的一种制冰系统,本方法的工作过程如下:接通制冰系统电源,所有设备上电并保持为待机状态;在静置足够长的时间使得系统处于完全融冰状态时,打开制冰自动运行控制开关,获得制冰启动的触发信号;此时标记为启动状态并执行步骤b;In this embodiment, the ice-making system control strategy can be implemented in a conventional ice-making machine. A conventional ice-making machine generally includes a compressor, an ice-making pump, a refrigerant pump, a condensing fan, a crystallizer, and a four-way valve. An ice-making system provided by another solution of the present invention can also be used. The working process of the method is as follows: turn on the power of the ice-making system, and all devices are powered on and kept in a standby state; When the ice is completely melted, turn on the ice-making automatic operation control switch to obtain a trigger signal for ice-making to start; at this time, mark it as the start-up state and perform step b;
设定设备开启的间隔时间为30秒,制冰系统依次开启载冷剂泵、冷凝风扇、制冰泵、压缩机;随后标记为运行状态并执行步骤c。Set the device-on interval to 30 seconds, and the ice-making system turns on the refrigerant pump, the condensing fan, the ice-making pump, and the compressor in sequence; then mark it as a running state and perform step c.
设定解冻子程序最高执行次数为1次,设定制冰停止的触发信号来源于压缩机过载、制冰泵故障、载冷剂泵故障、冷凝风扇故障或者是制冰自动运行控制开关关闭,则在未达到上述条件时,控制流程在步骤d和步骤g之间循环运行。Set the maximum execution times of the defrosting subroutine to 1, and set the trigger signal of ice making stop to come from compressor overload, ice making pump failure, refrigerant pump failure, condensing fan failure or the ice making automatic operation control switch is closed. Then, when the above conditions are not met, the control flow runs cyclically between step d and step g.
设定制冷泵出口的流量值为4m3/h,实时监测制冷泵出口的流量;若流量大于等于4m3/h,判断系统未发生堵塞,进入步骤e;若流量小于4m3/h,判断系统发生堵塞,进入步骤g。Set the flow rate at the outlet of the refrigeration pump to 4m 3 /h, and monitor the flow rate at the outlet of the refrigeration pump in real time; if the flow rate is greater than or equal to 4m 3 /h, it is judged that the system is not blocked, and then go to step e; if the flow rate is less than 4m 3 /h, judge The system is blocked, go to step g.
若监测到当前流量为4.5m3/h,判断系统未发生堵塞,进入步骤e。设定Tset为-0.4℃、Tmin为-1.6℃、Tmax为1℃、且设定促晶时长为500秒,监测制冰泵所在回路的过冷水经过换热板换后的温度,若此时为-0.5℃、则开启促晶器进行促晶。执行完促晶子程序之后,重新进入步骤c进行循环运行。If it is detected that the current flow rate is 4.5m 3 /h, it is determined that the system is not blocked, and the process goes to step e. Set T set to -0.4 °C, T min to -1.6 °C, T max to 1 °C, and set the crystallization promotion time to 500 seconds. If the temperature is -0.5°C at this time, the crystallizer is turned on for crystallizing. After executing the subroutine for promoting crystallization, re-enter step c for cyclic operation.
若监测到当前流量为3.5m3/h,判断系统发生堵塞,进入步骤g。设定解冻时长为400秒。此时首先关闭制冰泵,然后开启四通阀并解冻400秒;随后关闭四通阀并重新开启制冰泵。If it is detected that the current flow rate is 3.5m 3 /h, it is judged that the system is blocked, and the process goes to step g. Set the defrosting time to 400 seconds. At this time, firstly turn off the ice making pump, then open the four-way valve and defrost for 400 seconds; then close the four-way valve and turn on the ice making pump again.
由于设定解冻子程序最高执行次数为1次,此时满足制冰停止条件。设定设备关闭的间隔时间为10秒,制冰系统依次关闭压缩机、冷凝风扇、载冷剂泵、制冰泵。执行完制冰停止子程序之后,将制冰系统标记为待机状态,将制冰自动运行控制开关复位为关闭状态,并重新进入步骤a,等待下一次启动运行。Since the maximum number of execution times of the defrosting subroutine is set to be 1, the ice making stop condition is satisfied at this time. Set the interval time for equipment shutdown to 10 seconds, and the ice making system will turn off the compressor, condensing fan, refrigerant pump, and ice making pump in sequence. After executing the ice-making stop subroutine, mark the ice-making system as the standby state, reset the ice-making automatic operation control switch to the off state, and re-enter step a to wait for the next start-up operation.
此外,本发明还提供一种制冰系统,其利用上述介绍的制冰系统控制策略运行,系统包括压缩机、制冰泵、载冷剂泵、蒸发板、冷凝风扇、促晶器和四通阀;压缩机的高压出口连接四通阀入口且压缩机的低压入口连接四通阀出口,以实现气体压缩;冷凝风扇的一端和蒸发板换的一端通过膨胀阀连接,冷凝风扇的另一端连接至四通阀的常开口,蒸发板换的另一端连接至四通阀的常闭口,其中,四通阀的通断电用于对常开口和常闭口进行转换,以改变气体流动方向实现工况的切换,四通阀断电时为制冷工况,通电时为制热工况;载冷剂泵通过管道与蒸发板换、过冷板换连接形成载冷剂回路,以实现载冷剂的流动;制冰泵通过管道与促晶器、过冷板换连接形成制冰回路,以实现冰浆和水的流动,冷凝风扇用于气体冷却,蒸发板换用于气体蒸发,促晶器用于产生冰晶,本发明此处提供的制冰系统可用于执行上述介绍的制冰系统控制策略。In addition, the present invention also provides an ice-making system, which operates using the above-described ice-making system control strategy, the system includes a compressor, an ice-making pump, a refrigerant pump, an evaporating plate, a condensing fan, a crystallizer, and a spool. valve; the high-pressure outlet of the compressor is connected to the four-way valve inlet and the low-pressure inlet of the compressor is connected to the four-way valve outlet to realize gas compression; one end of the condensing fan and the other end of the evaporating plate are connected through the expansion valve, and the other end of the condensing fan is connected To the normally open port of the four-way valve, the other end of the evaporation plate is connected to the normally closed port of the four-way valve. When the four-way valve is de-energized, it is in cooling mode, and when it is energized, it is in heating mode; the refrigerant pump is connected with the evaporating plate and the sub-cooling plate through the pipeline to form a refrigerant circuit, so as to realize the refrigerant circuit. The ice-making pump is connected with the crystallizer and the subcooling plate through the pipeline to form an ice-making circuit to realize the flow of ice slurry and water. The condensing fan is used for gas cooling, the evaporation plate is used for gas evaporation, and the crystallizer uses For generating ice crystals, the ice making system provided herein can be used to implement the ice making system control strategy described above.
本发明针对制冰系统的多种运行工况,将其分为待机状态、启动状态、运行状态、停机状态,通过合理的判断条件和跳转流程,结合不同工作模式和不同功能对应开启的设备,设计了一种制冰系统的自动运行控制策略,可以有效减少制冰运行过程制冰回路的堵冰现象、缩短制冰时间并降低设备能耗,从而在满足用户用冷需求的基础上,实现制冰系统的安全、连续、高效运行。According to the various operating conditions of the ice-making system, the invention divides it into a standby state, a start-up state, a running state, and a stop state. Through reasonable judgment conditions and jumping procedures, the device can be correspondingly opened in combination with different working modes and different functions. , an automatic operation control strategy of the ice-making system is designed, which can effectively reduce the ice-blocking phenomenon of the ice-making circuit during the ice-making operation, shorten the ice-making time and reduce the energy consumption of the equipment. Realize the safe, continuous and efficient operation of the ice making system.
上述实施例只是为了说明本发明的技术构思及特点,其目的是在于让本领域内的普通技术人员能够了解本发明的内容并据以实施,并不能以此限制本发明的保护范围。凡是根据本发明内容的实质所做出的等效的变化或修饰,都应涵盖在本发明的保护范围内。The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and the purpose thereof is to enable those of ordinary skill in the art to understand the content of the present invention and implement them accordingly, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the essence of the present invention shall be included within the protection scope of the present invention.
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