CN113324298B

CN113324298B - Ice storage control device and ice storage system

Info

Publication number: CN113324298B
Application number: CN202110695401.3A
Authority: CN
Inventors: 胡龙
Original assignee: GUANGZHOU KELI NEW ENERGY CO Ltd
Current assignee: GUANGZHOU KELI NEW ENERGY CO Ltd
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2021-11-26
Anticipated expiration: 2041-06-23
Also published as: CN113324298A

Abstract

The invention discloses an ice cold accumulation control device and an ice cold accumulation system, which comprise a refrigeration mechanism, a load distribution mechanism and an auxiliary plate type heat exchanger; the load distribution mechanism is arranged on a main pipeline in the refrigerating mechanism, is used for outputting the cold energy output by the refrigerating unit through the main plate type heat exchanger or storing the cold energy through the ice storage tank according to the load requirement, and can adjust the distribution proportion; an inner surrounding area and a peripheral area are arranged in the ice storage tank, the peripheral area is used for heat exchange between the main pipeline and the ice storage tank, the auxiliary plate type heat exchanger is communicated with the ice storage tank through an auxiliary pipeline, and the inner surrounding area is used for heat exchange between the auxiliary pipeline and the ice storage tank; the proportion of real-time refrigeration and real-time ice making is reasonably adjusted according to the temperature difference requirement through the load distribution mechanism, so that the use requirement is met; the auxiliary plate type heat exchanger is matched with the air expansion shaft in the ice storage tank for use, and the ice in the ice storage tank can be completely released for utilization, so that the utilization rate is high.

Description

Ice storage control device and ice storage system

Technical Field

The invention relates to the technical field of ice cold accumulation, in particular to an ice cold accumulation control device and an ice cold accumulation system.

Background

The ice storage air conditioning system generally comprises a refrigerating unit, a storage device (or a reservoir), an auxiliary device, a connection device between the devices, an adjusting control device and the like. The ultimate goal of ice storage air conditioning systems is to provide a comfortable environment for buildings. In addition, the system also has the advantages of achieving the best energy utilization efficiency, saving the running electricity charge and providing a safe and reliable ice storage air conditioning system for users.

The priority type operation strategy of the cold accumulation equipment means that the cold accumulation equipment releases cold preferentially, and a refrigerating unit is responsible for supplying cold for loads exceeding the cold release capacity. This approach is typically used at a lower cost per unit of cold storage than per unit of refrigeration unit cold production. The preferred type of cold storage device is relatively more complex to control than the preferred type of refrigeration unit. In addition, the phenomenon that most of the stored cold energy is released by the cold storage equipment in the front period of the cold release process and the refrigerating unit and the cold storage equipment cannot meet the requirement of an air conditioner load in the later peak load process is avoided, so that the residual cold energy of the cold storage equipment is reasonably controlled, and the method is very important for designing the condition that the peak load of the air conditioner appears in the afternoon period. In general, a priority operation strategy of the cold storage equipment requires that a 24-hour air conditioner load distribution diagram on the day is predicted by the cold storage system, and a minimum cold supply control distribution diagram of a refrigerating unit on the day in a cold supply process is determined, so that the cold storage equipment can have enough cold release amount to match the refrigerating unit to meet the requirement of the air conditioner load at any time.

The control of the cold accumulation system mainly solves the problem of cold supply load distribution between the refrigerating unit and the cold accumulation equipment except for ensuring the conversion of cold accumulation and cold supply modes and the control of the water supply or return temperature of the air conditioner, and particularly ensures that the cold energy of the cold accumulation equipment is completely released as far as possible when the cold accumulation system is in partial load, namely an ice melting priority type operation strategy can be adopted, even the cold accumulation system can be operated completely, namely the refrigerating unit is stopped in daytime, and the air conditioner load is completely met by the cold accumulation equipment. When the daily air-conditioning load is designed, a priority operation strategy of the refrigerating unit is adopted to ensure the space-by-space air-conditioning load requirement. At present, the automatic control system of the cold accumulation system mostly adopts a direct digital control system which combines a direct digital controller with a computer technology, an electronic sensor and an actuating mechanism. The cold accumulation of the refrigerating unit is a quantitative output, and the cold release of the cold accumulation device is a total output. If the cold storage device and the refrigerating unit are connected in series, the control system is simpler, the water supply temperature is easy to keep constant, and for the parallel system, the water supply temperature is difficult to control, particularly in the later stage of cold release and ice melting, the outlet temperature of the cold storage device is gradually increased, and is difficult to keep constant compared with the outlet temperature of the refrigerating unit. In order to fully release the cold energy of the cold accumulation equipment every day, keep relatively constant water supply temperature and meet the requirement of designing daily air-conditioning load, a computer is generally used as monitoring equipment of the cold accumulation system, the internal condition of the cold accumulation equipment is monitored time by utilizing signals fed back by a flow meter and a thermometer arranged in the system, and the computer is used for predicting the load of the air-conditioning system so as to establish the operation strategy of the cold accumulation system as the priority type of a refrigerating unit or the priority type of the cold accumulation equipment.

The existing parallel ice storage system is difficult to accurately control in the aspects of real-time ice storage and real-time refrigeration, and cannot more accurately control cooling and meet the energy-saving requirement; therefore, the ice storage control device and the ice storage system are provided.

Disclosure of Invention

The invention aims at the defects and provides an ice storage control device and an ice storage system, the proportion of real-time refrigeration and real-time ice making is reasonably adjusted according to the temperature difference requirement through a load distribution mechanism, the use requirement is met, and more energy is saved; the auxiliary plate type heat exchanger is matched with the air expansion shaft in the ice storage tank for use, ice in the ice storage tank can be completely released to be utilized, and the problem is solved with high utilization rate.

The technical scheme of the invention is realized as follows:

a control device for ice cold accumulation comprises a refrigeration mechanism, a load distribution mechanism, an auxiliary plate type heat exchanger and a PLC (programmable logic controller);

the refrigeration mechanism comprises a refrigeration unit, a main pipeline, an ice storage tank and a main board type heat exchanger, wherein the refrigeration unit, the ice storage tank and the main board type heat exchanger are respectively connected together through a plurality of main pipelines which are mutually connected and combined, an ethylene glycol pump and four electric control valves are mounted on the main pipeline, and a system formed by the refrigeration unit, the ethylene glycol pump, the ice storage tank and the main board type heat exchanger is divided into a plurality of working modes through the four electric control valves, namely a refrigeration machine ice storage mode, a refrigeration machine cold supply mode, an ice storage tank cold supply mode and a combined cold supply mode;

the load distribution mechanism is arranged on a main pipeline in the refrigerating mechanism, is used for outputting the cold energy output by the refrigerating unit through the main plate type heat exchanger or storing the cold energy through the ice storage tank according to the load requirement, and can adjust the distribution proportion;

the load distribution mechanism comprises a valve body, one end of the valve body is provided with an inlet, the other end of the valve body is provided with two outlets which are parallel and level to each other, and the inlet and the two outlets are respectively communicated with different main pipelines; a positive and negative rotation stepping motor is fixedly installed on one side of the outer portion of the valve body, a rotating rod is installed on one side of the valve body in a threaded mode, a column gear is fixedly connected to one end of the rotating rod, a driving gear is installed on a rotating shaft of the positive and negative rotation stepping motor, and the driving gear is in meshed connection with the column gear;

a square cavity communicated with the inlet and a limiting cavity communicated with the outlet are formed in the valve body, the limiting cavity is communicated with the square cavity, a plate-type valve core is slidably mounted in the limiting cavity, and the plate-type valve core slides in the limiting cavity to adjust the size ratio of opening and closing of the two outlets; one end of the rotating rod is rotatably arranged at one end of the plate type valve core; a piston cavity is formed in one end of the limiting cavity, a sealing piston is fixedly sleeved on the rotating rod, and the sealing piston is installed in the piston cavity in a sliding and sealing mode;

an inner surrounding area and a peripheral area are arranged in the ice storage tank, the peripheral area is used for heat exchange between the main pipeline and the ice storage tank, the auxiliary plate type heat exchanger is communicated with the ice storage tank through an auxiliary pipeline, and the inner surrounding area is used for heat exchange between the auxiliary pipeline and the ice storage tank;

the auxiliary pipeline comprises a heat conduction pipe and a transmission pipe, an air expansion shaft is rotatably mounted at the center of an inner surrounding area of the ice storage tank, the interior of the air expansion shaft is provided with a hollow heat conduction inner shaft, one end of the heat conduction pipe is communicated with the upper end of the hollow heat conduction inner shaft through a rotary joint I, one end of the transmission pipe is communicated with the lower end of the hollow heat conduction inner shaft through a rotary joint II, the exterior of the air expansion shaft is provided with a heat conduction air expansion outer sleeve, a lug in a right-angled triangle shape is fixedly connected to the surface of the heat conduction air expansion outer sleeve, a variable frequency motor is fixedly mounted at the bottom of the ice storage tank, a rotating shaft of the variable frequency motor is in transmission connection with the hollow heat conduction inner shaft through a belt pulley and a belt, and a waterproof temperature sensor is mounted at the bottom of the inner surrounding area of the ice storage tank;

the control output end of the PLC is respectively connected with the electric control ends of the four electric control valves, the forward and reverse rotation stepping motors and the variable frequency motor; and the signal output end of the waterproof temperature sensor is connected with the signal input end of the PLC.

Preferably, the four electric control valves are respectively an electric control valve I, an electric control valve II, an electric control valve III and an electric control valve IV, wherein the electric control valve I and the electric control valve II are respectively arranged on two branches at the outlet end of the refrigerating unit, and the rear ends of the two branches are respectively connected with the ice storage tank and the main board type heat exchanger; the electric control valve III and the electric control valve IV are respectively arranged on two branches at the outlet end of the ice storage tank, and the rear ends of the two branches are respectively communicated with a main pipeline in front of the refrigerating unit and a main pipeline in front of the main plate type heat exchanger.

Preferably, the plate valve core has a length equal to the distance between the centers of the two outlets.

Preferably, a rotary disc bearing is fixedly installed at one end of the plate type valve core, one end of the rotating rod is fixedly inserted into an inner ring of the rotary disc bearing, the piston cavity is of a cylindrical structure, the sealing piston is of a cylindrical structure, and the sealing piston can rotate and slide in the piston cavity in a sealing manner; and one end of the piston cavity is provided with a threaded hole, and the rotating rod is provided with an external thread matched with the threaded hole.

Preferably, the upper end of the hollow heat-conducting inner shaft is provided with a supporting bearing, the outer ring of the supporting bearing is fixedly connected with the inner wall of the ice storage tank through a connecting rod, and the lower end of the hollow heat-conducting inner shaft is rotatably connected with the bottom of the ice storage tank through a sealing bearing.

Preferably, an air passage communicated with the inner side of the heat-conducting inflatable outer sleeve is arranged in the pipe wall of the lower end of the hollow heat-conducting inner shaft, and a valve core and a pressure release valve communicated with the air passage are respectively installed on two sides of the lower end of the hollow heat-conducting inner shaft.

Preferably, the end gap and the surface gap of the heat-conducting inflatable outer sleeve are hermetically connected through rubber flexible connections.

Preferably, a support frame is fixedly connected to the outer side of the bottom of the ice storage tank, one end of the heat conduction pipe is arranged on the side portion of the peripheral area in the ice storage tank, one end of the heat conduction pipe and one end of the transmission pipe are respectively communicated with two ends of a group of heat exchange channels in the auxiliary plate type heat exchanger, and a group of ethylene glycol pumps are also installed on the transmission pipe.

Preferably, the auxiliary plate heat exchanger and the main plate heat exchanger are both installed on a heat exchange pipeline of the user side, and a freezing pump is installed on the heat exchange pipeline of the user side.

The invention also provides an ice cold storage system, which comprises the ice cold storage control device, an indoor temperature sensor, an outdoor temperature sensor and a cloud computer, wherein the signal output ends of the indoor temperature sensor and the outdoor temperature sensor are respectively connected with the signal input end of a PLC (programmable logic controller), and the PLC is in communication connection with the cloud computer; the cloud computer is in communication connection with a meteorological information platform of a local meteorological bureau through a network, and the cloud computer is in communication connection with a power utilization peak-to-peak prediction database of the local power supply bureau through the network.

Compared with the prior art, the invention has the advantages and positive effects that:

1. according to the invention, through the load distribution mechanism, when the electricity consumption peak meets the refrigeration use requirement, ice storage is carried out through the load distribution, and the proportion of real-time refrigeration and real-time ice making is reasonably adjusted according to the temperature difference requirement; if the real-time refrigeration can not meet the refrigeration requirement at the peak of electricity utilization, the proportion is adjusted, ice is used for releasing cold, and the proportion is automatically adjusted according to the temperature difference, so that the use requirement is met; and is more energy-saving.

2. According to the invention, the auxiliary plate type heat exchanger is matched with the air expansion shaft in the ice storage tank for use, when the ice release cold quantity is insufficient in the electricity consumption peak, the air expansion shaft is driven to rotate by the variable frequency motor, so that the ice melting or the flow of ice water is accelerated, the heat exchange speed is increased, the cold quantity release is improved, the requirement is met, and the use is more convenient; the ice in the ice storage tank can be completely released and utilized, and the utilization rate is high; and the cold energy transmitted from the air expansion shaft is guided into the heat exchange pipeline of the user end, so that the requirement of the cold energy of the user end is relieved.

3. According to the invention, the cloud computer is connected with the meteorological information platform and the power consumption peak-to-peak prediction database, the ice cold accumulation amount and the real-time refrigerating amount are reasonably adjusted in real time through the predicted temperature information and the power consumption peak-to-peak conditions, the control mode is more reasonable, and the energy is saved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of parallel connection of ice storage systems in the prior art;

fig. 2 is a schematic structural diagram of an ice storage control device according to an embodiment of the invention;

FIG. 3 is a schematic structural diagram of a load distribution mechanism according to an embodiment of the present invention;

FIG. 4 is a schematic view of the cross-sectional structure A-A of FIG. 3 according to the present invention;

FIG. 5 is a schematic view of the cross-sectional structure B-B of FIG. 3 according to the present invention;

FIG. 6 is a schematic structural view of the interior of an ice storage tank according to an embodiment of the present invention;

FIG. 7 is an enlarged view of section C of FIG. 6 according to the present invention;

FIG. 8 is a partial schematic structural view of the interior of an inflatable shaft according to an embodiment of the invention;

fig. 9 is a system block diagram of an ice thermal storage system according to an embodiment of the present invention.

In the figure:

1. a refrigeration unit; 2. an ethylene glycol pump; 3. an electric control valve I; 4. an electric control valve II; 5. an electric control valve III; 6. an electric control valve IV; 7. an ice storage tank; 8. a freeze pump; 9. a main plate type heat exchanger; 10. a user side;

11. a load distributing mechanism; 1101. a valve body; 1102. an inlet; 1103. a forward and reverse rotation stepping motor; 1104. a driving gear; 1105. an external thread; 1106. rotating the rod; 1107. a column gear; 1108. a threaded hole; 1109. a piston cavity; 1110. a sealing piston; 1111. a turntable bearing; 1112. a plate-type valve core; 1113. an outlet; 1114. a limiting cavity; 1115. a square cavity;

701. a peripheral region; 702. an inner peripheral region; 703. a support frame; 704. a support bearing; 705. a rotary joint I; 706. a connecting rod; 707. a heat conducting pipe; 708. an inflatable shaft; 7081. a heat-conducting inflatable outer sleeve; 7082. rubber flexible connection; 7083. an airway; 7084. a hollow heat-conducting inner shaft; 709. a tab; 710. a variable frequency motor; 711. a belt pulley; 712. a belt; 713. a rotary joint II; 714. a conveying pipe; 715. sealing the bearing; 716. a waterproof temperature sensor; 717. a pressure relief valve; 718. a valve core;

12. an auxiliary plate heat exchanger; 13. a main pipeline; 14. an auxiliary pipeline; 15. a PLC controller; 16. a cloud computer; 17. an indoor temperature sensor; 18. an outdoor temperature sensor; 19. a weather information platform; 20. and (4) using a power peak-to-peak prediction database.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

The invention is further described with reference to the following figures and specific examples.

Example 1

As shown in fig. 1 to 8, the control device for ice storage according to the embodiment of the present invention includes a refrigeration mechanism, a load distribution mechanism 11, an auxiliary plate heat exchanger 12, and a PLC controller 15;

as shown in fig. 1, the refrigeration mechanism includes a refrigeration unit 1, a main pipeline 13, an ice storage tank 7 and a main plate heat exchanger 9, the refrigeration unit 1, the ice storage tank 7 and the main plate heat exchanger 9 are respectively connected together by a plurality of main pipelines 13 through interconnection combination, a glycol pump 2 and four electric control valves are installed on the main pipeline 13, and a system formed by the refrigeration unit 1, the glycol pump 2, the ice storage tank 7 and the main plate heat exchanger 9 is divided into a plurality of working modes through the four electric control valves, namely a refrigeration machine ice storage mode, a refrigeration machine cold supply mode, an ice storage tank cold supply mode and a combined cold supply mode; the above is a parallel ice storage system in the prior art.

As shown in fig. 2, the load distribution mechanism 11 is installed on the main pipe 13 in the refrigeration mechanism, and the load distribution mechanism 11 is used for outputting the cooling energy output by the refrigeration unit 1 through the main plate heat exchanger 9 or storing the cooling energy through the ice storage tank 7 according to the load demand, and the distribution ratio can be adjusted.

As shown in fig. 3 and 4, the load distributing mechanism 11 includes a valve body 1101, one end of the valve body 1101 is provided with an inlet 1102, and the other end of the valve body 1101 is provided with two outlets 1113 which are flush with each other, and the inlet 1102 and the two outlets 1113 are respectively communicated with different main pipes 13; a forward and reverse rotation stepping motor 1103 is fixedly installed on one side of the outer portion of the valve body 1101, a rotating rod 1106 is installed on one side of the valve body 1101 in a threaded mode, a column gear 1107 is fixedly connected to one end of the rotating rod 1106, a driving gear 1104 is installed on a rotating shaft of the forward and reverse rotation stepping motor 1103, and the driving gear 1104 is in meshed connection with the column gear 1107.

As shown in fig. 4, a square cavity 1115 communicated with the inlet 1102 and a limit cavity 1114 communicated with the outlet 1113 are arranged inside the valve body 1101, the limit cavity 1114 is communicated with the square cavity 1115, a plate-type valve core 1112 is slidably mounted inside the limit cavity 1114, and the plate-type valve core 1112 slides in the limit cavity 1114 to adjust the opening and closing size ratio of the two outlets 1113; one end of the rotating rod 1106 is rotatably installed at one end of the plate type valve core 1112; a piston cavity 1109 is formed at one end of the limiting cavity 1114, a sealing piston 1110 is fixedly sleeved on the rotating rod 1106, and the sealing piston 1110 is installed in the piston cavity 1109 in a sliding and sealing mode.

As shown in fig. 6, the ice bank 7 is provided with an inner peripheral region 702 and an outer peripheral region 701 inside, the outer peripheral region 701 is used for heat exchange between the main pipe 13 and the ice bank 7, the auxiliary plate heat exchanger 12 is communicated with the ice bank 7 through the auxiliary pipe 14, and the inner peripheral region 702 is used for heat exchange between the auxiliary pipe 14 and the ice bank 7.

As shown in fig. 6, 7 and 8, the auxiliary conduit 14 includes a heat pipe 707 and a transmission pipe 714, an inflatable shaft 708 is rotatably installed in the center of an inner peripheral region 702 of the ice storage tank 7, the interior of the inflatable shaft 708 is provided with a hollow heat-conducting inner shaft 7084, one end of the heat pipe 707 is communicated with the upper end of the hollow heat-conducting inner shaft 7084 through a rotary joint I705, one end of the transmission pipe 714 is communicated with the lower end of the hollow heat-conducting inner shaft 7084 through a rotary joint II713, the exterior of the inflatable shaft 708 is provided with a heat-conducting inflatable outer sleeve 7081, a right-angled triangular protruding piece 709 is fixedly connected to the surface of the heat-conducting inflatable outer sleeve 7081, a variable frequency motor 710 is fixedly installed at the bottom of the ice storage tank 7, a rotating shaft of the variable frequency motor 710 is in transmission connection with the hollow heat-conducting inner shaft 7084 through a pulley 711 and a belt 712, and a waterproof temperature sensor 716 is installed at the bottom of the inner peripheral region 702 of the ice storage tank 7.

As shown in fig. 9, the control output end of the PLC controller 15 is connected to the electric control ends of the four electric control valves, the forward and reverse rotation stepping motor 1103 and the variable frequency motor 710 respectively; the signal output end of the waterproof temperature sensor 716 is connected with the signal input end of the PLC 15.

Specifically, as shown in fig. 2, the four electric control valves are an electric control valve I3, an electric control valve II 4, an electric control valve III 5, and an electric control valve IV 6, wherein the electric control valve I3 and the electric control valve II 4 are respectively installed on two branches at the outlet end of the refrigeration unit 1, and the rear ends of the two branches are respectively connected with the ice storage tank 7 and the main plate heat exchanger 9; the electric control valve III 5 and the electric control valve IV 6 are respectively arranged on two branches at the outlet end of the ice storage tank 7, and the rear ends of the two branches are respectively communicated with a main pipeline 13 in front of the refrigerating unit 1 and a main pipeline 13 in front of the main plate type heat exchanger 9.

By adopting the technical scheme, the mode selection can be carried out in the ice storage mode of the refrigerating machine, the cold supply mode of the ice storage tank and the combined cold supply mode by utilizing the combined opening and closing of the electric control valve I3, the electric control valve II 4, the electric control valve III 5 and the electric control valve IV 6.

As shown in fig. 5, the plate spool 1112 has a length equal to the distance between the centers of the two outlets 1113.

By adopting the technical scheme, the two outlets 1113 can always keep a total gas output by the movement of the plate-type valve core 1112, the gas output sectional area of one outlet is reduced by a certain amount, the gas output sectional area of the other outlet is increased by a certain amount, and a total balance pressure can be always kept in the adjusting process, so that the stability is good.

As shown in fig. 4, a turntable bearing 1111 is fixedly installed at one end of the plate type valve core 1112, one end of the rotating rod 1106 is fixedly inserted into an inner ring of the turntable bearing 1111, the piston cavity 1109 is set to be a cylindrical structure, the sealing piston 1110 is set to be a cylindrical structure, and the sealing piston 1110 can rotate and slide in the piston cavity 1109 in a sealing manner; a threaded hole 1108 is formed at one end of the piston cavity 1109, and an external thread 1105 matched with the threaded hole 1108 is arranged on the rotating rod 1106.

Through adopting above-mentioned technical scheme, sealed piston 1110's effect mainly plays the activity sealed effect, prevents to leak gas in the adjustment process.

As shown in fig. 6, a support bearing 704 is mounted on the upper end of the hollow heat-conducting inner shaft 7084, the outer ring of the support bearing 704 is fixedly connected to the inner wall of the ice storage tank 7 by a connecting rod 706, and the lower end of the hollow heat-conducting inner shaft 7084 is rotatably connected to the bottom of the ice storage tank 7 by a seal bearing 715.

By adopting the above technical solution, the support bearing 704 and the seal bearing 715 function to vertically support the air inflation shaft 708.

As shown in fig. 7 and 8, an air passage 7083 communicating with the inside of the heat-conducting inflatable outer sleeve 7081 is arranged in the lower end pipe wall of the hollow heat-conducting inner shaft 7084, and a valve core 718 and a pressure release valve 717 communicating with the air passage 7083 are respectively mounted on two sides of the lower end of the hollow heat-conducting inner shaft 7084.

By adopting the technical scheme, in implementation, the valve core 718 is used for inflating the inflatable shaft 708; and the pressure relief valve 717 is provided as a ball valve to control the size of the flow relief hole, so that the air expansion shaft 708 is slowly contracted by slow pressure relief.

As shown in fig. 8, the end gap and the surface gap of the heat-conducting ballooning outer shell 7081 are hermetically connected by a rubber soft joint 7082.

Through adopting above-mentioned technical scheme, through sealing connection, avoid ice infiltration to the seam of physiosis axle 708 in, influence the shrink of physiosis axle.

Specifically, a support frame 703 is fixedly connected to the outer side of the bottom of the ice storage tank 7, one end of a heat pipe 707 is disposed at the edge of the peripheral region 701 in the ice storage tank 7, one end of the heat pipe 707 and one end of a transmission pipe 714 are respectively communicated with two ends of a group of heat exchange channels in the auxiliary plate heat exchanger 12, and a group of glycol pumps 2 is also installed on the transmission pipe 714.

In implementation, the auxiliary plate heat exchanger 12 and the main plate heat exchanger 9 are both installed on the heat exchange pipeline of the user end 10, and the freeze pump 8 is installed on the heat exchange pipeline of the user end 10.

By adopting the technical scheme, the auxiliary plate type heat exchanger 12 is utilized to accelerate the release of cold energy and relieve the required pressure; and the ice melting is accelerated by matching with the air expansion shaft 708, so that the utilization rate is improved.

As shown in fig. 9, the present invention further provides an ice storage system, which includes the above-mentioned ice storage control device, an indoor temperature sensor 17, an outdoor temperature sensor 18 and a cloud computer 16, wherein signal output ends of the indoor temperature sensor 17 and the outdoor temperature sensor 18 are respectively connected with a signal input end of a PLC controller 15, and the PLC controller 15 is in communication connection with the cloud computer 16; the cloud computer 16 is in communication connection with a weather information platform 19 of a local weather station through a network, and the cloud computer 16 is in communication connection with a power utilization peak-to-peak prediction database 20 of a local power supply station through a network.

For the convenience of understanding the technical solutions of the present invention, the following detailed description will be made on the working principle or the operation mode of the present invention in the practical process.

In the actual application of the method, the device is used,

according to the invention, through the load distribution mechanism 11, when the electricity consumption peak meets the refrigeration use requirement, ice storage is carried out through load distribution, and the proportion of real-time refrigeration and real-time ice making is reasonably adjusted according to the temperature difference requirement; if the real-time refrigeration can not meet the refrigeration requirement at the peak of electricity utilization, the proportion is adjusted, ice is used for releasing cold, and the proportion is automatically adjusted according to the temperature difference, so that the use requirement is met; and is more energy-saving.

According to the invention, the auxiliary plate type heat exchanger 12 is matched with the air expansion shaft 708 in the ice storage tank 7 for use, when the ice-releasing cold quantity is insufficient in the peak of electricity utilization, the air expansion shaft 708 is driven to rotate by the variable frequency motor 710, so that the ice melting or the flow of ice water is accelerated, the heat exchange speed is increased, the cold quantity release is improved, the requirement is met, and the use is more convenient; the ice in the ice storage tank 7 can be completely released and utilized, and the utilization rate is high; and the cold energy transferred from the air expansion shaft 708 is guided into the heat exchange pipeline of the user terminal 10, so that the requirement of the cold energy of the user terminal is relieved.

According to the invention, the cloud computer 16 is connected with the meteorological information platform 19 and the electricity consumption peak-to-peak prediction database 20, the ice cold storage amount and the real-time refrigerating amount are reasonably adjusted in real time according to the predicted temperature information and the electricity consumption peak-to-peak conditions, and the control mode is more reasonable and more energy-saving.

The present invention can be easily implemented by those skilled in the art from the above detailed description. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the basis of the disclosed embodiments, a person skilled in the art can combine different technical features at will, thereby implementing different technical solutions.

Claims

1. The ice storage control device is characterized by comprising a refrigeration mechanism, a load distribution mechanism (11), an auxiliary plate type heat exchanger (12) and a PLC (programmable logic controller) (15); the refrigeration mechanism comprises a refrigeration unit (1), a main pipeline (13), an ice storage tank (7) and a main board type heat exchanger (9), the refrigeration unit (1), the ice storage tank (7) and the main board type heat exchanger (9) are respectively connected together through a plurality of main pipelines (13) which are mutually connected and combined, an ethylene glycol pump (2) and four electric control valves are mounted on the main pipeline (13), and a system formed by the refrigeration unit (1), the ethylene glycol pump (2), the ice storage tank (7) and the main board type heat exchanger (9) is divided into a plurality of working modes through the four electric control valves, namely a refrigeration machine ice storage mode, a refrigeration machine cold supply mode, an ice storage tank cold supply mode and a combined cold supply mode;

the load distribution mechanism (11) is arranged on a main pipeline (13) in the refrigerating mechanism, the load distribution mechanism (11) is used for outputting the cold energy output by the refrigerating unit (1) through the main plate type heat exchanger (9) or storing the cold energy through the ice storage tank (7) according to the load requirement, and the distribution ratio can be adjusted;

the load distribution mechanism (11) comprises a valve body (1101), one end of the valve body (1101) is provided with an inlet (1102), the other end of the valve body (1101) is provided with two outlets (1113) which are flush with each other, and the inlet (1102) and the two outlets (1113) are respectively communicated with different main pipelines (13); a forward and reverse rotation stepping motor (1103) is fixedly installed on one side of the outer portion of the valve body (1101), a rotating rod (1106) is installed on one side of the valve body (1101) in a threaded mode, a cylindrical gear (1107) is fixedly connected to one end of the rotating rod (1106), a driving gear (1104) is installed on a rotating shaft of the forward and reverse rotation stepping motor (1103), and the driving gear (1104) is in meshed connection with the cylindrical gear (1107);

a square cavity (1115) communicated with the inlet (1102) and a limiting cavity (1114) communicated with the outlet (1113) are arranged in the valve body (1101), the limiting cavity (1114) is communicated with the square cavity (1115), a plate type valve core (1112) is installed in the limiting cavity (1114) in a sliding mode, and the plate type valve core (1112) slides in the limiting cavity (1114) and is used for adjusting the size ratio of the opening and closing of the two outlets (1113); one end of the rotating rod (1106) is rotatably arranged at one end of the plate type valve core (1112); a piston cavity (1109) is formed in one end of the limiting cavity (1114), a sealing piston (1110) is fixedly sleeved on the rotating rod (1106), and the sealing piston (1110) is installed in the piston cavity (1109) in a sliding and sealing mode;

an inner surrounding area (702) and a peripheral area (701) are arranged in the ice storage tank (7), the peripheral area (701) is used for heat exchange between the main pipeline (13) and the ice storage tank (7), the auxiliary plate heat exchanger (12) is communicated with the ice storage tank (7) through an auxiliary pipeline (14), and the inner surrounding area (702) is used for heat exchange between the auxiliary pipeline (14) and the ice storage tank (7);

the auxiliary pipeline (14) comprises a heat conduction pipe (707) and a transmission pipe (714), an inflatable shaft (708) is rotatably installed at the center of an inner surrounding area (702) of the ice storage tank (7), a hollow heat conduction inner shaft (7084) is arranged inside the inflatable shaft (708), one end of the heat conduction pipe (707) is communicated with the upper end of the hollow heat conduction inner shaft (7084) through a rotary joint I (705), one end of the transmission pipe (714) is communicated with the lower end of the hollow heat conduction inner shaft (7084) through a rotary joint II (713), a heat conduction inflatable outer sleeve (7081) is arranged outside the inflatable shaft (708), a right-angled triangular protruding piece (709) is fixedly connected to the surface of the heat conduction inflatable outer sleeve (7081), a variable frequency motor (710) is fixedly installed at the bottom of the ice storage tank (7), and a rotating shaft of the variable frequency motor (710) is in transmission connection with the hollow heat conduction inner shaft (7084) through a belt pulley (711) and a belt (712), a waterproof temperature sensor (716) is arranged at the bottom of an inner surrounding area (702) of the ice storage tank (7);

the control output end of the PLC (15) is respectively connected with the electric control ends of the four electric control valves, the positive and negative rotation stepping motor (1103) and the variable frequency motor (710); the signal output end of the waterproof temperature sensor (716) is connected with the signal input end of the PLC (15);

the four electric control valves are respectively an electric control valve I (3), an electric control valve II (4), an electric control valve III (5) and an electric control valve IV (6), wherein the electric control valve I (3) and the electric control valve II (4) are respectively installed on two branches at the outlet end of the refrigerating unit (1), and the rear ends of the two branches are respectively connected with the ice storage tank (7) and the main plate type heat exchanger (9); the electric control valve III (5) and the electric control valve IV (6) are respectively arranged on two branches at the outlet end of the ice storage tank (7), and the rear ends of the two branches are respectively communicated with a main pipeline (13) in front of the refrigerating unit (1) and a main pipeline (13) in front of the main plate type heat exchanger (9).

2. An ice storage control device as claimed in claim 1, wherein the plate spool (1112) has a length equal to the distance between the centres of the two outlets (1113).

3. An ice cold storage control device according to claim 2, characterized in that one end of the plate-type valve core (1112) is fixedly installed with a turntable bearing (1111), one end of the rotating rod (1106) is fixedly inserted into the inner ring of the turntable bearing (1111), the piston cavity (1109) is arranged into a cylindrical structure, the sealing piston (1110) is arranged into a cylindrical structure, and the sealing piston (1110) can rotate and slide in the piston cavity (1109) in a sealing way; one end of the piston cavity (1109) is provided with a threaded hole (1108), and the rotating rod (1106) is provided with an external thread (1105) matched with the threaded hole (1108).

4. The ice storage control device as claimed in claim 1, wherein the upper end of the hollow heat conducting inner shaft (7084) is provided with a supporting bearing (704), the outer ring of the supporting bearing (704) is fixedly connected with the inner wall of the ice storage tank (7) through a connecting rod (706), and the lower end of the hollow heat conducting inner shaft (7084) is rotatably connected with the bottom of the ice storage tank (7) through a sealing bearing (715).

5. The ice storage control device according to claim 4, wherein an air passage (7083) communicated with the inner side of the heat conduction air expansion outer sleeve (7081) is arranged in the lower end pipe wall of the hollow heat conduction inner shaft (7084), and a valve core (718) and a pressure release valve (717) communicated with the air passage (7083) are respectively arranged on two sides of the lower end of the hollow heat conduction inner shaft (7084).

6. An ice storage control device as claimed in claim 5, wherein the end gap and the surface gap of the heat conducting air inflation outer sleeve (7081) are hermetically connected by rubber soft connection (7082).

7. The ice storage control device according to claim 1, wherein a support frame (703) is fixedly connected to the outer side of the bottom of the ice storage tank (7), one end of the heat pipe (707) is arranged at the edge of the peripheral region (701) in the ice storage tank (7), one end of the heat pipe (707) and one end of the transmission pipe (714) are respectively communicated with two ends of a group of heat exchange channels in the auxiliary plate heat exchanger (12), and a group of glycol pumps (2) are also installed on the transmission pipe (714).

8. A control device for ice storage as claimed in claim 7, characterized in that the auxiliary plate heat exchanger (12) and the main plate heat exchanger (9) are installed on the heat exchange pipeline of the user terminal (10), and the refrigerant pump (8) is installed on the heat exchange pipeline of the user terminal (10).

9. An ice thermal storage system, characterized by comprising the ice thermal storage control device, an indoor temperature sensor (17), an outdoor temperature sensor (18) and a cloud computer (16) as claimed in any one of claims 1 to 8, wherein the signal output ends of the indoor temperature sensor (17) and the outdoor temperature sensor (18) are respectively connected with the signal input end of a PLC (15), and the PLC (15) is in communication connection with the cloud computer (16); the cloud computer (16) is in communication connection with a meteorological information platform (19) of a local meteorological office through a network, and the cloud computer (16) is in communication connection with a power utilization peak-to-peak prediction database (20) of a local power supply office through the network.