CN113028688B - Supermarket cold chain energy-saving control method, device and system - Google Patents
Supermarket cold chain energy-saving control method, device and system Download PDFInfo
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- CN113028688B CN113028688B CN202110464786.2A CN202110464786A CN113028688B CN 113028688 B CN113028688 B CN 113028688B CN 202110464786 A CN202110464786 A CN 202110464786A CN 113028688 B CN113028688 B CN 113028688B
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
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Abstract
The application relates to a supermarket cold chain energy-saving control method, device and system, belonging to the field of cold chain energy-saving control, wherein the method comprises the following steps: responding to the trigger instruction to output a detection instruction for detecting whether the cooling of the refrigerant is normal; responding to the detection instruction to obtain a temperature value A1 of a heat medium inlet of the plate exchange condenser and a temperature value A2 of a heat medium outlet of the plate exchange condenser; comparing temperature value A1 with temperature value A2 to obtain a preceding stage comparison result, outputting a current regulation instruction based on the preceding stage comparison result, and outputting a delay detection request; and responding to the delay detection request, obtaining a temperature value A2+ at the outlet of the heat medium of the plate heat exchange condenser and a temperature value A3 at the outlet of the heat exchange tube after the delay is set for time, comparing the temperature value A2+ with the temperature value A3 to obtain a rear-stage comparison result, and outputting a secondary adjustment instruction of the round based on the rear-stage comparison result. The cooling of heat medium can be realized to the expense energy that this application can utilize linked system itself, reaches the purpose of energy saving.
Description
Technical Field
The application relates to the field of cold chain link energy control, in particular to a supermarket cold chain energy-saving control method, device and system.
Background
The cold chain system of the supermarket at present generally comprises a compressor, a condenser, a capillary tube and an evaporator, when the cold chain system works, a gaseous refrigerant is compressed into high-temperature high-pressure gas through the compressor and then enters the condenser, the condenser is equivalent to a heat exchange device, and the high-temperature high-pressure gaseous refrigerant is subjected to heat exchange to form a low-temperature high-pressure liquid refrigerant. The liquid refrigerant passes through the capillary tube, and the refrigerant flowing out of the capillary tube is restrained, so that the pressure of the refrigerant after coming out is reduced, the temperature of the refrigerant is continuously reduced to form gas and liquid, and the refrigerant enters the evaporator and is compressed into high-temperature and high-pressure gas again.
The prior Chinese patent document with the publication number of CN105509386A discloses a supermarket cold chain and air conditioner linkage system, which comprises a cold chain system and an air conditioner system, wherein the cold chain system comprises a cold chain compressor unit, an air-cooled condenser and refrigeration equipment, the air conditioner system comprises an air conditioner heat pump unit and air conditioner terminal equipment, a plate-type condenser, a controller and a flow regulating valve are arranged between the cold chain system and the air conditioner system, the plate-type condenser is connected between the air-cooled condenser and the refrigeration equipment, the controller controls the opening degree of the flow regulating valve, and the water quantity flowing to the plate-type condenser through the flow regulating valve by the air conditioner system is regulated.
However, the related art in the above has the following drawbacks: although the cold water of the air conditioning system is conveyed to the plate exchange condenser to cool the refrigerating medium of the cold chain system, the water supply amount of the air conditioning system is fixed, the water supply amount cannot be adjusted according to the actual operation condition, the cold water is easily wasted, and the energy conservation is not facilitated.
Disclosure of Invention
In order to help reduce energy waste and achieve the effect of energy conservation, the application provides a supermarket cold chain energy-saving control method, device and system.
In a first aspect, the application provides a supermarket cold chain energy-saving control method, which adopts the following technical scheme:
a supermarket cold chain energy-saving control method is based on a supermarket cold chain energy-saving linkage system, and the supermarket cold chain energy-saving linkage system comprises the following steps: the heat exchanger comprises a compressor, a plate-type heat exchanger condenser, a heat exchange tube, a capillary tube and an evaporator which are sequentially connected, wherein the evaporator is connected with the compressor through an output pipeline, and the outer wall of the heat exchange tube is tightly attached to the outer wall of the output pipeline; the method comprises the following steps:
responding to the trigger instruction to output a detection instruction for detecting whether the cooling of the refrigerant is normal;
responding to the detection instruction to obtain a temperature value A1 of a plate exchange condenser heat medium inlet and a temperature value A2 of a plate exchange condenser heat medium outlet;
comparing the temperature value A1 with the temperature value A2 to obtain a preceding stage comparison result, outputting a current regulating instruction for regulating the opening size of an electric regulating valve preset at a cold medium inlet and outlet of a plate-change condenser based on the preceding stage comparison result and a mapping relation table in a preset detection mechanism, and outputting a delay detection request;
and responding to the delay detection request to obtain a temperature value A2+ of the heat medium outlet of the plate heat exchanger condenser and a temperature value A3 of the heat exchange pipe outlet after the delay is set for time, comparing the temperature value A2+ with the temperature value A3 to obtain a rear-stage comparison result, and outputting a current-round secondary adjustment instruction for adjusting the opening size of an electric adjusting valve preset at the cold medium inlet and outlet of the plate heat exchanger condenser based on the rear-stage comparison result and a preset mapping relation table in a detection mechanism.
By adopting the technical scheme, the heat exchange tube is added, so that the refrigerating capacity of the output pipeline can be utilized to further cool the refrigerant, and the cooling pressure of the plate-exchange condenser is reduced. In addition, this application scheme can once adjust electric control valve according to the temperature of the import of board trades condenser heat medium and the temperature of board trades condenser heat medium export, then carries out the secondary according to the temperature of board trades condenser heat medium export and the temperature of heat exchange tube export, when guaranteeing to normally cool off the refrigerant, has realized the cold volume utilization of great degree, helps reducing the energy waste, reaches energy-conserving effect.
Optionally, the electric control valve is divided into a zero-opening temporary storage state, a normal-opening state and a high-opening working state according to the opening size which can be adjusted.
By adopting the technical scheme, the working state of the electric regulating valve is preset, so that the electric regulating valve is convenient to control, and the cold water flow in the plate exchange condenser is adjusted.
Optionally, the step of comparing the temperature value a1 with the temperature value a2 to obtain a preceding stage comparison result, and outputting a current round of adjustment instructions for adjusting the opening degree of an electric control valve preset at a cold medium inlet and outlet of a plate-change condenser based on the preceding stage comparison result and a mapping relation table in a preset detection mechanism and outputting a delay detection request includes:
comparing temperature value a1 with temperature value a 2;
confirming a primary forward result when the temperature value A2 is in a preset normal low-temperature interval, confirming a secondary forward result when the temperature value A2 is in a preset normal high-temperature interval, and confirming a reverse result when the temperature value A2 is not in the two normal temperature intervals and/or the temperature value A1 minus the temperature value A2 is lower than a set threshold value;
finding out a corresponding mapping item in a mapping relation table according to a primary forward result, a secondary forward result and a reverse result, and outputting a primary adjusting instruction for adjusting the opening size of an electric adjusting valve preset at a cold medium inlet and outlet of a condenser according to the mapping item, wherein the electric adjusting valve is controlled to be in a zero-opening temporary storage state when the primary forward result is obtained, the electric adjusting valve is controlled to be in a normal-opening state when the secondary forward result is obtained, and the electric adjusting valve is controlled to be in a high-opening working state when the reverse result is obtained;
and outputting a delay detection request.
Through adopting above-mentioned technical scheme, can once adjust electric control valve's operating condition according to the real-time temperature value that the board trades condenser and imports and exports, on the basis of guaranteeing normal cooling function, be favorable to energy-conservation.
Optionally, the step of responding to the delay detection request to obtain a temperature value a2+ at the outlet of the heat medium of the plate heat exchanger condenser and a temperature value A3 at the outlet of the heat exchange pipe after the delay of the set time, comparing the temperature value a2+ with the temperature value A3 to obtain a later comparison result, and outputting a current round of readjustment instruction for adjusting the opening size of the electric control valve preset at the inlet and outlet of the cold medium of the plate heat exchanger condenser based on the later comparison result and a mapping relationship table in a preset detection mechanism includes:
responding to the delay detection request, obtaining a temperature value A2+ of a heat medium outlet of the plate heat exchange condenser and a temperature value A3 of a heat exchange tube outlet after the delay is set for time, and comparing the temperature value A2+ with the temperature value A3;
confirming a secondary forward result when the temperature value A3 is in a set temperature range, confirming a reverse result when the temperature value A3 is higher than the set temperature range and the electric control valve is currently in a normal opening state or a high opening working state, confirming the secondary forward result when the temperature value A3 is higher than the set temperature range and the electric control valve is currently in a zero opening temporary storage state and the temperature value A2+ minus the temperature value A3 is in an allowable value range, and confirming the reverse result when the temperature value A3 is higher than the set temperature range and the electric control valve is currently in a zero opening temporary storage state and the temperature value A2+ minus the temperature value A3 is greater than the allowable value range;
and finding out a corresponding mapping item in the mapping relation table according to the secondary forward result and the reverse result, outputting a current secondary adjusting instruction for adjusting the opening degree of an electric adjusting valve preset at the cold medium inlet and outlet of the plate-change condenser according to the mapping item, controlling the electric adjusting valve to be in a normal opening degree state when the secondary forward result is obtained, and controlling the electric adjusting valve to be in a high opening degree working state when the reverse result is obtained.
Through adopting above-mentioned technical scheme, can carry out the secondary according to the real-time temperature value that board traded condenser export and heat exchange tube export and adjust electric control valve's operating condition, on the basis that guarantees that capillary import temperature can reach the temperature standard of setting, furthest's realization is energy-conserving.
Optionally, the step of outputting a detection instruction for detecting whether the cooling of the refrigerant is normal in response to the trigger instruction includes:
and when the accumulated time with the time point of sending the readjustment instruction of the previous round as the starting point reaches a preset time threshold, outputting a trigger instruction.
By adopting the technical scheme, the periodic detection triggering can be realized, and the stable operation of a cold chain system is ensured.
In a second aspect, the application provides a supermarket cold chain energy-saving control device, which adopts the following technical scheme:
a supermarket cold chain energy-saving control device comprises a memory and a processor, wherein at least one instruction, at least one program, a code set or an instruction set is stored in the memory, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by the processor to realize the supermarket cold chain energy-saving control method in the first aspect.
By adopting the technical scheme, the program capable of loading and executing the method is stored in the memory, so that the energy waste is reduced and the energy-saving effect is achieved.
In a third aspect, the application provides a supermarket cold chain energy-saving linkage system, which adopts the following technical scheme:
a supermarket cold chain energy-saving linkage system comprises a compressor, a plate-type condenser, a heat exchange tube, a capillary tube and an evaporator which are sequentially connected, wherein an output pipeline is connected between the evaporator and the compressor, the outer wall of the heat exchange tube is tightly attached to the outer wall of the output pipeline, and a cold medium inlet and a cold medium outlet of the plate-type condenser are both connected with electric regulating valves; further comprising:
the first temperature sensor is arranged at the heat medium inlet of the plate heat exchanger condenser and is used for detecting the medium temperature at the heat medium inlet of the plate heat exchanger condenser;
the second temperature sensor is arranged at the heat medium outlet of the plate heat exchanger condenser and is used for detecting the medium temperature at the heat medium outlet of the plate heat exchanger condenser;
the third temperature sensor is arranged at the outlet of the heat exchange tube and is used for detecting the temperature of the medium at the outlet of the heat exchange tube;
according to the supermarket cold chain energy-saving control device in the second aspect, the input end is connected with the first temperature sensor, the second temperature sensor and the third temperature sensor, and the output end is connected with the two electric regulating valves.
By adopting the technical scheme, the refrigerant cooled by the plate-type heat exchanger condenser can be further cooled by the heat exchange tube tightly attached to the output pipeline, so that the cooling pressure of the plate-type heat exchanger condenser can be reduced, and the reduction of the using amount of cold water is facilitated; meanwhile, the three temperature sensors are matched with a supermarket cold chain energy-saving control device, so that the using amount of cold water can be reasonably adjusted while the refrigerant is fully cooled, and the energy-saving effect is also facilitated.
Optionally, the heat exchange tube is semi-annular and has the lateral wall of an indent and the lateral wall of an evagination, the lateral wall of heat exchange tube indent and the outer wall laminating of output pipeline.
Through adopting above-mentioned technical scheme, the area of contact of improvement heat exchange tube and output pipeline that can great degree guarantees heat exchange efficiency.
Optionally, the capillary tube is disposed within the output line; the input end of the capillary penetrates out of the output pipeline to be connected with the heat exchange pipe, and the output end of the capillary penetrates out of the output pipeline to be connected with the evaporator.
Through adopting above-mentioned technical scheme, output line can follow the capillary and absorb heat, helps the refrigerant in the output line to become gaseous completely, is favorable to compressor work. In addition, the capillary tube is contacted with the refrigerant in the output pipeline, the temperature of the refrigerant in the capillary tube can be greatly reduced, so that the temperature difference in the capillary tube is increased, and the refrigeration effect is improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through the arrangement of the temperature sensor, the electric regulating valve and the control device, the electric regulating valve can be regulated for the first time according to the temperature of the heat medium inlet of the plate-exchange condenser and the temperature of the heat medium outlet of the plate-exchange condenser, and then regulated for the second time according to the temperature of the heat medium outlet of the plate-exchange condenser and the temperature of the heat exchange tube outlet, so that the refrigerant can be cooled normally, the cold energy utilization to a greater degree is realized, and the energy waste is reduced, thereby achieving the energy-saving effect;
2. through the arrangement of the heat exchange tube tightly attached to the output pipeline, the refrigerant cooled by the plate-type condenser can be further cooled through the heat exchange tube, the cold water consumption of the plate-type condenser is reduced, the operating pressure of the plate-type condenser is reduced, and the energy-saving effect is achieved.
Drawings
Fig. 1 is a block diagram of a supermarket cold chain energy-saving linkage system according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram for showing a connection relationship among a compressor, a plate-type heat exchanger, a heat exchange tube and a capillary tube according to an embodiment of the present application.
Fig. 3 is a cross-sectional view of a heat exchange tube and an output line of an embodiment of the present application.
Fig. 4 is a block diagram of a supermarket cold chain energy-saving control device according to an embodiment of the present application.
Fig. 5 is a schematic flow chart of a supermarket cold chain energy-saving control method according to an embodiment of the application.
Description of reference numerals: 1. a compressor; 2. a plate-exchange condenser; 3. a heat exchange pipe; 31. a partition plate; 32. an ascending cavity; 33. a down cavity; 4. a capillary tube; 5. an evaporator; 6. an output line; 7. a main board; 71. a memory; 72. a processor; 73. an electric control valve; 74. a first temperature sensor; 75. a second temperature sensor; 76. a third temperature sensor.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
First, terms related to embodiments of the present application will be described.
A compressor: a reciprocating air compressor is commonly used in a cold chain system, and is a device for compressing gaseous refrigerant into high-temperature and high-pressure gas, and the working principle is that the volume of a cylinder body is periodically changed through the reciprocating motion of a piston or a diaphragm in a cylinder, and the pressurization and the conveying of the gas are realized.
Plate exchange of condenser: the gaseous refrigerant is compressed into high-temperature high-pressure gas by the compressor and then enters the plate exchange condenser, the plate exchange condenser is equivalent to heat exchange equipment, and the high-temperature high-pressure gaseous refrigerant is subjected to heat exchange to form a low-temperature high-pressure liquid refrigerant.
Capillary tube: the liquid refrigerant formed by the plate-exchange condenser passes through the capillary tube again, and the refrigerant flowing out of the capillary tube is restrained, so that the pressure of the refrigerant after coming out is reduced, the temperature is continuously reduced, and the refrigerant becomes gas and liquid.
An evaporator: the refrigerant formed by mixing the gaseous state and the liquid state after passing through the capillary tube enters the evaporator and exchanges heat with an object needing to be cooled, at the moment, the refrigerant only changes the phase into the gaseous state, but the temperature of the refrigerant cannot be reduced, and then the gaseous refrigerant after the phase change flows back to the compressor to be compressed into high-temperature and high-pressure gas again.
The following describes in further detail an embodiment of the supermarket energy-saving linkage system of the present application with reference to the drawings of the specification.
An embodiment of the application discloses a supermarket cold chain energy-saving linkage system. Referring to fig. 1, the supermarket cold chain energy-saving linkage system comprises a compressor 1, a plate-type heat exchange condenser 2, a heat exchange tube 3, a capillary tube 4 and an evaporator 5 which are connected in sequence. When the plate-type heat exchanger works, a gaseous refrigerant is compressed into high-temperature and high-pressure gas through the compressor 1 and then sequentially enters the plate-type heat exchanger condenser 2 and the heat exchange tube 3, the plate-type heat exchanger condenser 2 and the heat exchange tube 3 are equivalent to heat exchange equipment, and the high-temperature and high-pressure gaseous refrigerant is subjected to heat exchange to form a low-temperature and high-pressure liquid refrigerant; then the liquid refrigerant flowing out of the heat exchange tube 3 enters the capillary tube 4 to be changed into gas and liquid with lower temperature and enters the evaporator 5 to exchange heat with an object, the refrigerant is changed into gas state by phase change during heat exchange, but the temperature of the refrigerant is not changed at the moment; the gaseous refrigerant after the phase change finally flows back to the compressor 1 to be compressed again into high-temperature and high-pressure gas.
Referring to fig. 2 and 3, an output pipeline 6 is connected between the evaporator 5 and the compressor 1, the heat exchange tube 3 is semi-annular and has a concave outer side wall and a convex outer side wall, and the concave outer side wall of the heat exchange tube 3 is tightly attached to the outer wall of the output pipeline 6. Because the temperature of the refrigerant flowing into the output pipeline 6 from the evaporator 5 is very low, the heat exchange tube 3 is tightly attached to the output pipeline 6, the energy of the output pipeline 6 can be fully utilized to cool the high-temperature gaseous refrigerant sent by the compressor 1, and the temperature of the refrigerant at the inlet of the capillary tube 4 is ensured not to be too high, so that the refrigeration effect is ensured; simultaneously, the high temperature gaseous refrigerant that compressor 1 sent also heats the low temperature gaseous refrigerant in the output line 6, helps the refrigerant in the output line 6 to become gaseous completely, because compressor 1 is to gaseous substance design, so set up so and can effectively avoid moisture to accumulate in compressor 1 to can effectively improve compressor 1's life and guarantee its steady operation.
Specifically, the two ends of the heat exchange tube 3 are sealed, the middle part of the inner cavity of the heat exchange tube is provided with a partition plate 31, the inner cavity of the heat exchange tube 3 is divided into an ascending cavity 32 and a descending cavity 33 by the partition plate 31, and the tops of the ascending cavity 32 and the descending cavity 33 are communicated. The liquid refrigerant coming out of the plate-change condenser 2 enters from the top of the ascending chamber 32 and then flows out from the bottom of the descending chamber 33 into the capillary tube 4. In addition, the capillary tube 4 is arranged in the output pipeline 6, the input end of the capillary tube 4 penetrates out of the output pipeline 6 to be connected with the heat exchange tube 3, and the output end of the capillary tube 4 penetrates out of the output pipeline 6 to be connected with the evaporator 5. The capillary tube 4 is arranged in such a way that the output line 6 can play a similar role as the heat exchange tube 3, namely, the output line 6 absorbs heat from the capillary tube 4, which helps the refrigerant in the output line 6 to be completely changed into a gas state, and is beneficial to the operation of the compressor 1; in the case of the capillary tube 4, the temperature of the refrigerant in the capillary tube 4 is greatly reduced, and the temperature difference in the capillary tube 4 is increased, thereby improving the cooling effect.
Referring to fig. 4, the supermarket cold chain energy-saving control device is further included, and the supermarket cold chain energy-saving control device includes a main board 7, and a memory 71 and a processor 72 are integrated on the main board 7. Referring to fig. 1, the refrigerant inlet and the refrigerant outlet of the panel exchanger condenser 2 are connected to an electric control valve 73 for receiving a control command from the processor 72 to control the refrigerant flow rate of the panel exchanger condenser 2. The plate heat exchanger condenser 2 heat medium inlet is provided with a first temperature sensor 74 for detecting medium temperature data (namely refrigerant temperature data) of the plate heat exchanger condenser 2 heat medium inlet for processing by the processor 72; a second temperature sensor 75 is arranged at the heat medium outlet of the plate heat exchanger condenser 2 and is used for detecting the medium temperature at the heat medium outlet of the plate heat exchanger condenser 2 for processing by the processor 72; the outlet of the heat exchange tube 3 is provided with a third temperature sensor 76 for detecting the temperature of the medium at the outlet of the heat exchange tube 3 for processing by the processor 72. The memory 71 is used for storing a supermarket cold chain energy-saving control program, and the processor 72 executes the following steps of the supermarket cold chain energy-saving control method when the supermarket cold chain energy-saving control program is run.
The implementation of the supermarket cold chain energy-saving control method is explained in detail below by combining the supermarket cold chain energy-saving linkage system:
referring to fig. 5, another embodiment of the present application provides a supermarket cold chain energy saving control method, including:
s10, outputting a trigger instruction when the accumulated time with the starting point of the previous round of time point of sending the readjustment instruction reaches a preset time threshold;
it should be noted that, because there is no concept of "previous round" initially, when the supermarket cold chain energy-saving linkage system of the present application is deployed and starts to operate, a current round of readjustment instruction is sent, and the system does not respond to the current round of readjustment instruction at this time, and only the sending time of the current round of readjustment instruction is extracted as the time point of the previous round of sending the current round of readjustment instruction at this time, thereby ensuring smooth performance of the following method steps.
And S20, responding to the trigger instruction and outputting a detection instruction for detecting whether the cooling of the refrigerant is normal.
S30, responding to the detection instruction to obtain a temperature value A1 of the heat medium inlet of the plate exchange condenser 2 and a temperature value A2 of the heat medium outlet of the plate exchange condenser 2;
here, temperature value a1 is obtained by acquiring detection data of first temperature sensor 74, and temperature value a2 is obtained by acquiring detection data of second temperature sensor 75.
And S40, comparing the temperature value A1 with the temperature value A2 to obtain a preceding stage comparison result, outputting a current round of adjusting instructions for adjusting the opening degree of the electric adjusting valve 73 preset at the cold medium inlet and outlet of the condenser 2 based on the preceding stage comparison result and a mapping relation table in a preset detection mechanism, and outputting a delay detection request.
And S50, responding to the delay detection request, obtaining a temperature value A2+ of the heat medium outlet of the plate heat exchanger condenser 2 and a temperature value A3 of the outlet of the heat exchange tube 3 after the delay is set for time, comparing the temperature value A2+ with the temperature value A3 to obtain a rear-stage comparison result, and outputting a current round secondary adjustment instruction for adjusting the opening size of the electric adjusting valve 73 preset at the cold medium inlet and outlet of the plate heat exchanger condenser 2 based on the rear-stage comparison result and a preset mapping relation table in a detection mechanism.
It should be noted that the electric control valves 73 at the inlet and outlet of the plate-type condenser 2 can be divided into three working states, namely a zero-opening temporary storage state, a normal-opening state and a high-opening state, according to the opening that can be adjusted, the zero-opening temporary storage state is a completely closed state, the high-opening state is a fully open state, and the normal-opening state is an opening that is set in advance according to needs; the current round of adjustment instructions and the current round of readjustment instructions both contain state information, and the electric control valve 73 can switch the working state of itself according to the received adjustment instructions.
S40 includes:
s41, comparing temperature value a1 with temperature value a 2.
S42, determining a first-order forward result when temperature a2 is in a preset normal low-temperature interval, determining a second-order forward result when temperature a2 is in a preset normal high-temperature interval, and determining a reverse result when temperature a2 is not in the two normal temperature intervals and/or when temperature a1 minus temperature a2 is lower than a set threshold;
the normal low-temperature range is 0-Q1 and does not contain Q1, and the normal high-temperature range is Q1-Q2 and contains Q1 and Q2, wherein Q1 is less than Q2; if temperature value a2 is not in the two normal temperature ranges and/or temperature value a1 minus temperature value a2 is lower than the set threshold, it indicates that the heat dissipation of the plate-type heat exchanger-condenser 2 to the refrigerant does not meet the requirement, and it is determined that the result is the reverse.
S43, finding out a corresponding mapping item in a mapping relation table according to the primary forward result, the secondary forward result and the reverse result, outputting a primary adjusting instruction for adjusting the opening size of the electric adjusting valve 73 preset at the cold medium inlet and outlet of the condenser 2 according to the mapping item, controlling the electric adjusting valve 73 to be in a zero opening temporary storage state when the primary forward result is obtained, controlling the electric adjusting valve 73 to be in a normal opening state when the secondary forward result is obtained, and controlling the electric adjusting valve 73 to be in a high opening working state when the reverse result is obtained;
s44, outputting a delay detection request;
the delay detection request carries a delay setting time, and the delay setting time is used for enabling the system to perform detection again after the system adjusts the working state of the electric control valve 73 once and operates for a period of time to reach a relative stable state.
S50 includes:
s51, responding to the delay detection request, obtaining a temperature value A2+ of the outlet of the heat medium of the plate heat exchange condenser 2 and a temperature value A3 of the outlet of the heat exchange tube 3 after the delay is set for time, and comparing the temperature value A2+ with the temperature value A3;
s52, determining a secondary forward result when temperature value A3 is within the set temperature range, determining a reverse result when temperature value A3 is above the set temperature range and electric control valve 73 is currently in the normal opening state or the high opening state, determining a secondary forward result when temperature value A3 is above the set temperature range and electric control valve 73 is currently in the zero opening temporary storage state and temperature value a2+ minus temperature value A3 is within the allowable value range, and determining a reverse result when temperature value A3 is above the set temperature range and electric control valve 73 is currently in the zero opening temporary storage state and temperature value a2+ minus temperature value A3 is greater than the allowable value range;
and S53, finding out a corresponding mapping item in the mapping relation table according to the secondary forward result and the reverse result, outputting a primary readjustment instruction for adjusting the opening size of the electric control valve 73 preset at the cold medium inlet and outlet of the condenser 2 according to the mapping item, controlling the electric control valve 73 to be in a normal opening state when the secondary forward result is obtained, and controlling the electric control valve 73 to be in a high opening working state when the reverse result is obtained.
Based on the same inventive concept, the embodiment of the present application further discloses a computer-readable storage medium, where at least one instruction, at least one program, code set, or instruction set is stored in the storage medium, and the at least one instruction, the at least one program, the code set, or the instruction set can be loaded and executed by the processor 72 to implement the steps of the supermarket cold chain energy saving control method provided in the embodiment of the foregoing method.
It should be understood that reference to "a plurality" herein means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
Those skilled in the art will appreciate that all or part of the steps of implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing associated hardware, where the program may be stored in a computer-readable storage medium, where the above-mentioned storage medium includes, for example: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (7)
1. A supermarket cold chain energy-saving control method is characterized in that the method is based on a supermarket cold chain energy-saving linkage system, and the supermarket cold chain energy-saving linkage system comprises the following steps: the heat exchanger comprises a compressor, a plate-type heat exchanger condenser, a heat exchange tube, a capillary tube and an evaporator which are sequentially connected, wherein the evaporator is connected with the compressor through an output pipeline, and the outer wall of the heat exchange tube is tightly attached to the outer wall of the output pipeline; the method comprises the following steps:
outputting a detection instruction for detecting normal cooling of the refrigerant in response to the trigger instruction;
responding to the detection instruction to obtain a temperature value A1 of a plate exchange condenser heat medium inlet and a temperature value A2 of a plate exchange condenser heat medium outlet;
comparing the temperature value A1 with the temperature value A2 to obtain a preceding stage comparison result, outputting a current regulating instruction for regulating the opening size of an electric regulating valve preset at a cold medium inlet and outlet of a plate-change condenser based on the preceding stage comparison result and a mapping relation table in a preset detection mechanism, and outputting a delay detection request;
responding to the delay detection request, obtaining a temperature value A2+ of a heat medium outlet of the plate heat exchange condenser and a temperature value A3 of a heat exchange pipe outlet after delaying for a set time, comparing the temperature value A2+ with the temperature value A3 to obtain a rear-stage comparison result, and outputting a current-round secondary adjustment instruction for adjusting the opening size of an electric adjusting valve preset at a cold medium inlet and outlet of the plate heat exchange condenser based on the rear-stage comparison result and a mapping relation table in a preset detection mechanism;
the electric regulating valve is divided into a zero-opening temporary storage state, a normal-opening state and a high-opening working state according to the opening size which can be regulated;
comparing the temperature value A1 with the temperature value A2 to obtain a preceding stage comparison result, outputting a current regulating instruction for regulating the opening size of an electric regulating valve preset at a cold medium inlet and outlet of a plate-change condenser based on the preceding stage comparison result and a mapping relation table in a preset detection mechanism, and outputting a delay detection request, wherein the step comprises the following steps of:
comparing temperature value a1 with temperature value a 2;
confirming a primary forward result when the temperature value A2 is in a preset normal low-temperature interval, confirming a secondary forward result when the temperature value A2 is in a preset normal high-temperature interval, and confirming a reverse result when the temperature value A2 is not in the two normal temperature intervals and/or the temperature value A1 minus the temperature value A2 is lower than a set threshold value;
finding out a corresponding mapping item in a mapping relation table according to a primary forward result, a secondary forward result and a reverse result, and outputting a primary adjusting instruction for adjusting the opening size of an electric adjusting valve preset at a cold medium inlet and outlet of a condenser according to the mapping item, wherein the electric adjusting valve is controlled to be in a zero-opening temporary storage state when the primary forward result is obtained, the electric adjusting valve is controlled to be in a normal-opening state when the secondary forward result is obtained, and the electric adjusting valve is controlled to be in a high-opening working state when the reverse result is obtained;
and outputting a delay detection request.
2. The supermarket cold chain energy-saving control method according to claim 1, wherein the step of obtaining a temperature value A2+ at a heat medium outlet of the plate heat exchanger condenser and a temperature value A3 at a heat exchange pipe outlet after a delay setting time in response to the delay detection request, comparing the temperature value A2+ with the temperature value A3 to obtain a rear-stage comparison result, and outputting a current round readjustment instruction for adjusting the opening size of an electric control valve preset at the cold medium inlet and outlet of the plate heat exchanger condenser based on the rear-stage comparison result and a mapping relation table in a preset detection mechanism comprises:
responding to the delay detection request, obtaining a temperature value A2+ of a heat medium outlet of the plate heat exchange condenser and a temperature value A3 of a heat exchange tube outlet after the delay is set for time, and comparing the temperature value A2+ with the temperature value A3;
confirming a secondary forward result when the temperature value A3 is in a set temperature range, confirming a reverse result when the temperature value A3 is higher than the set temperature range and the electric control valve is currently in a normal opening state or a high opening working state, confirming the secondary forward result when the temperature value A3 is higher than the set temperature range and the electric control valve is currently in a zero opening temporary storage state and the temperature value A2+ minus the temperature value A3 is in an allowable value range, and confirming the reverse result when the temperature value A3 is higher than the set temperature range and the electric control valve is currently in a zero opening temporary storage state and the temperature value A2+ minus the temperature value A3 is greater than the allowable value range;
and finding out a corresponding mapping item in the mapping relation table according to the secondary forward result and the reverse result, outputting a current secondary adjusting instruction for adjusting the opening degree of an electric adjusting valve preset at the cold medium inlet and outlet of the plate-change condenser according to the mapping item, controlling the electric adjusting valve to be in a normal opening degree state when the secondary forward result is obtained, and controlling the electric adjusting valve to be in a high opening degree working state when the reverse result is obtained.
3. The supermarket cold chain energy-saving control method according to claim 1, wherein the step of outputting a detection instruction for detecting normal cooling of the refrigerant in response to the trigger instruction comprises:
and when the accumulated time with the time point of sending the readjustment instruction of the previous round as the starting point reaches a preset time threshold, outputting a trigger instruction.
4. A supermarket cold chain energy saving control device, characterized by comprising a memory and a processor, wherein at least one instruction, at least one program, code set or instruction set is stored in the memory, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by the processor to realize the supermarket cold chain energy saving control method according to any one of claims 1 to 3.
5. A supermarket cold chain energy-saving linkage system is characterized by comprising a compressor, a plate-type condenser, a heat exchange tube, a capillary tube and an evaporator which are sequentially connected, wherein an output pipeline is connected between the evaporator and the compressor, the outer wall of the heat exchange tube is tightly attached to the outer wall of the output pipeline, and a cold medium inlet and a cold medium outlet of the plate-type condenser are both connected with electric regulating valves; further comprising:
the first temperature sensor is arranged at a heat medium inlet of the plate heat exchanger condenser and is used for detecting the temperature of a medium at the heat medium inlet of the plate heat exchanger condenser;
the second temperature sensor is arranged at the heat medium outlet of the plate heat exchanger condenser and is used for detecting the medium temperature at the heat medium outlet of the plate heat exchanger condenser;
the third temperature sensor is arranged at the outlet of the heat exchange tube and is used for detecting the temperature of the medium at the outlet of the heat exchange tube;
the supermarket cold chain energy-saving control device as claimed in claim 4, wherein the input end is connected with the first temperature sensor, the second temperature sensor and the third temperature sensor, and the output end is connected with the two electric control valves.
6. The supermarket cold chain energy-saving linkage system according to claim 5, wherein the heat exchange tube is semi-annular and has an inner concave outer side wall and an outer convex outer side wall, and the inner concave outer side wall of the heat exchange tube is attached to the outer wall of the output pipeline.
7. The supermarket cold chain energy-saving linkage system of claim 6, wherein the capillary tube is disposed within an output pipeline; the input end of the capillary penetrates out of the output pipeline to be connected with the heat exchange pipe, and the output end of the capillary penetrates out of the output pipeline to be connected with the evaporator.
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| US4147037A (en) * | 1976-10-27 | 1979-04-03 | General Electric Company | High efficiency heat exchange for refrigeration suction line/capillary tube assembly |
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