CN111307478B - Online simulation detection platform of water ground source heat pump unit - Google Patents
Online simulation detection platform of water ground source heat pump unit Download PDFInfo
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- CN111307478B CN111307478B CN201811512896.6A CN201811512896A CN111307478B CN 111307478 B CN111307478 B CN 111307478B CN 201811512896 A CN201811512896 A CN 201811512896A CN 111307478 B CN111307478 B CN 111307478B
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- electric proportional
- water tank
- cooling
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 267
- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 238000004088 simulation Methods 0.000 title claims abstract description 17
- 239000000498 cooling water Substances 0.000 claims abstract description 102
- 238000007710 freezing Methods 0.000 claims abstract description 39
- 230000008014 freezing Effects 0.000 claims abstract description 39
- 238000001816 cooling Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 12
- 239000012535 impurity Substances 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/058—Safety, monitoring
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/16—Plc to applications
- G05B2219/163—Domotique, domestic, home control, automation, smart, intelligent house
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses an online simulation detection platform of a water-ground source heat pump unit, which comprises a condenser side water system, an evaporator side water system, a cooling tower, a PLC (programmable logic controller) self-control box, a cooling water tank and a freezing water tank, wherein the condenser side water system, the evaporator side water system, the cooling tower, the cooling water tank and the freezing water tank are connected through pipelines. The simulation detection platform is adopted to replace the traditional field detection mode of the personnel in the field, so that the detection is more convenient, the detection data is more accurate, and the detection quality of the unit is ensured. Based on the law of conservation of energy, the utility model provides a method for adjusting the water flow by adopting a pipeline bypass structure to adjust the flow of a main pipeline, replaces the traditional method for adjusting the water flow by adopting a frequency converter to control the rotating speed of a variable-frequency water pump motor, greatly saves the investment cost and the construction cost of equipment, and saves the electricity consumption of the frequency converter control.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an online simulation detection platform of a water-ground source heat pump unit.
Background
The times are advancing, the life quality of people is continuously improving, and simultaneously, higher requirements are also put forward on the comfort of living environment, so that the vigorous development of domestic air conditioning industry is promoted, especially, the water-ground source heat pump unit is widely applied to some large and medium-sized central air conditioning systems, and higher requirements are put forward on the quality of the water-ground source heat pump unit by users. At present, the detection of the large-medium water ground source heat pump unit is generally carried out by technicians outside the manufacturer on the construction site, and the detection mode brings inconvenience to the detection personnel and also can cause some uncertain factors so as to be difficult to ensure the detection quality. Therefore, development of a working condition operation simulation detection platform of a large and medium-sized water-ground source heat pump unit is urgently needed in the industry so as to solve the problems of low quality of traditional off-site detection and inconvenience to detection personnel.
Disclosure of Invention
Aiming at the problems, the invention provides an online simulation detection platform of a water-ground source heat pump unit, which is based on the law of conservation of energy, the temperature of two water tanks is kept within a set value range through PLC automatic control, and the flow of a main pipeline is regulated by adopting a pipeline bypass method, so that the working condition requirement of online detection of the water-ground source heat pump unit is met, the energy consumption is effectively reduced, the investment is reduced, and the production cost is greatly saved.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
The online simulation detection platform of the water-ground source heat pump unit is characterized by comprising a condenser side water system, an evaporator side water system, a cooling tower, a PLC (programmable logic controller) self-control box, a cooling water tank and a freezing water tank, wherein the condenser side water system, the evaporator side water system, the cooling tower, the cooling water tank and the freezing water tank are connected through pipelines.
The condenser side water system comprises a gate valve, a cooling water pump, an electric proportional valve I, a Y-shaped filter, a cooling water flow transmitter, an electric proportional valve II, an electric proportional valve III, an electric proportional valve IV and a cooling water tank; the water outlet end of the gate valve is connected with the water inlet end of the cooling water flow transmitter, the water outlet end of the cooling water flow transmitter is branched into three paths, wherein the first path is connected with the water inlet end of the electric proportional valve II, and the water outlet end of the electric proportional valve II is connected with the cooling water tank; the second path is connected with the water inlet end of the electric proportional valve III, and the water outlet end of the electric proportional valve III is connected with the cooling tower; the water outlet end of the cooling tower is connected with the water inlet end of the electric proportional valve five through a Y-shaped filter, and the water outlet end of the electric proportional valve five is connected with a cooling water tank; the third path is connected with the water inlet end of the electric proportional valve IV, and the water outlet end of the electric proportional valve IV is connected with the freezing water tank.
The outlet of the cooling water tank is connected with the inlet of the Y-shaped filter, the outlet of the Y-shaped filter is connected with the cooling water pump, the cooling water pump is in parallel with the electric proportional valve, and the water outlet end of the cooling water pump is connected with the water return end of the condenser side through the gate valve to form a circulation loop of the whole condenser side water system.
The evaporator side water system comprises a gate valve, an electric proportional valve six, a chilled water pump, an electric proportional valve seven, a Y-type filter, an electric proportional valve eight, an electric proportional valve nine, a chilled water flow transmitter, a heater and a chilled water tank; the water outlet end of the gate valve is connected with the water inlet end of the frozen water flow transmitter, the water outlet end of the frozen water flow transmitter is branched into two paths, and the first path is connected with the cooling water tank through the electric proportional valve nine; the second path is connected with the water inlet end of the electric proportional valve eight, and the water outlet end of the electric proportional valve eight is connected with the freezing water tank;
An electric proportional valve seven and a heater are arranged between the electric proportional valve eight and the freezing water tank, wherein the water inlet end of the electric proportional valve seven is connected with the water inlet end of the electric proportional valve eight in parallel, the water outlet end of the electric proportional valve seven is connected with the heater in series, and the outlet of the heater is connected with the water outlet end of the electric proportional valve eight in parallel.
The water outlet end of the freezing water tank is connected with the water inlet end of the freezing water pump through a Y-shaped filter, the freezing water pump is connected with the electric proportional valve in parallel, and the water outlet end of the freezing water pump is connected with the water return end of the evaporator side through a gate valve to form a circulation loop of the whole evaporator side water system.
The cooling water tank is provided with a cooling water tank temperature transmitter, and the cooling water tank is provided with a cooling water tank temperature transmitter.
Further, an overflow pipe is connected between the cooling water tank and the freezing water tank, so that the water level between the cooling water tank and the freezing water tank is kept consistent.
Further, a thermometer and a pressure gauge are arranged on a pipeline between the gate valve and the cooling water flow transmitter, and a thermometer and a pressure gauge are also arranged on a pipeline between the cooling water pump and the gate valve and are used for measuring the temperature and the pressure of water entering and exiting the condenser side water system.
Further, a thermometer and a pressure gauge are arranged on a pipeline between the gate valve and the chilled water flow transmitter, and a thermometer and a pressure gauge are also arranged on a pipeline between the chilled water pump and the gate valve and are used for measuring the temperature and the pressure of water entering and exiting the evaporator side water system.
Further, a differential pressure meter is connected in series between the water inlet and outlet pipes of the condenser side water system, and a differential pressure meter is also connected in series between the water inlet and outlet pipes of the evaporator side water system, so that the pressure difference of the water inlet and outlet of the condenser side water system and the pressure difference of the water inlet and outlet of the evaporator side water system are respectively measured.
Setting, modifying and testing state displaying all data in the simulation detection platform, and completing the operations of each electric proportional valve, heater, cooling water pump, cooling water flow transmitter, chilled water pump, chilled water flow transmitter, cooling tower, cooling water tank temperature transmitter and chilled water tank temperature transmitter by using a PLC (programmable logic controller) automatic control box.
The beneficial effects of the invention are as follows:
The simulation detection platform is adopted to replace the traditional field detection mode of the personnel in the field, so that the detection is more convenient, the detection data is more accurate, and the detection quality of the unit is ensured.
Based on the law of conservation of energy, the utility model provides a method for adjusting the water flow by adopting a pipeline bypass structure to adjust the flow of a main pipeline, replaces the traditional method for adjusting the water flow by adopting a frequency converter to control the rotating speed of a variable-frequency water pump motor, greatly saves the investment cost and the construction cost of equipment, and saves the electricity consumption of the frequency converter control. The PLC is newly added for self control, the temperature of the two water tanks is balanced within the range of a set value, a method of independently cooling and heating the two water tanks by an air-cooled refrigerating unit and an air-cooled heat pump unit is replaced, the equipment investment of the air-cooled refrigerating unit and the air-cooled heat pump unit is reduced, and the equipment cost and the equipment electricity consumption are effectively saved.
Drawings
FIG. 1 is a schematic diagram of the online detection platform of the water-ground source heat pump unit;
Fig. 2 is an enlarged schematic view of point I of fig. 1.
In the figure: 1. the condenser side water system comprises 101, a gate valve, 102, a thermometer, 103, a pressure gauge, 104, a cooling water pump, 105, an electric proportional valve I, 106, a Y-type filter, 107, a cooling water flow transmitter, 108, an electric proportional valve II, 109, an electric proportional valve III, 110, an electric proportional valve IV, 2, an evaporator side water system, 201, a gate valve, 202, a thermometer, 203, a pressure gauge, 204, an electric proportional valve VI, 205, a chilled water pump, 206, an electric proportional valve seven, 207, a Y-type filter, 208, an electric proportional valve eight, 209, an electric proportional valve nine, 210, a chilled water flow transmitter, 211, a heater, 3, a cooling tower, 301, a Y-type filter, 302, an electric proportional valve IV, 4, a PLC self-control box, 5, a cooling water box, 501, a cooling water box temperature transmitter, 6, a chilled water box, 601, a chilled water box temperature transmitter, 7, an overflow pipe, 8 and a differential pressure gauge.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but embodiments of the present invention are not limited thereto.
As shown in FIG. 1, the online simulation detection platform of the water-ground source heat pump unit comprises a condenser side water system 1, an evaporator side water system 2, a cooling tower 3, a PLC (programmable logic controller) self-control box 4, a cooling water tank 5 and a freezing water tank 6, wherein the condenser side water system 1, the evaporator side water system 2, the cooling tower 3, the cooling water tank 5 and the freezing water tank 6 are connected through pipelines.
The PLC automatic control box 4 is electrically connected to the heater 211, the cooling water pump 104, the cooling water flow rate transmitter 107, the chilled water pump 205, the chilled water flow rate transmitter 210, the cooling tower 3, the cooling water tank temperature transmitter 501, the chilled water tank temperature transmitter 601, and the respective electric proportional valves.
The condenser side water system 1 comprises a gate valve 101, a cooling water pump 104, an electric proportional valve I105, a Y-type filter 106, a cooling water flow transmitter 107, an electric proportional valve II 108, an electric proportional valve III 109, an electric proportional valve IV 110 and a cooling water tank 5; the water outlet end of the gate valve 101 is connected with the water inlet end of the cooling water flow transmitter 107, the water outlet end of the cooling water flow transmitter 107 is branched into three paths, wherein the first path is connected with the water inlet end of the electric proportional valve II 108, and the water outlet end of the electric proportional valve II 108 is connected with the cooling water tank 5; the second path is connected with the water inlet end of the electric proportional valve III 109, and the water outlet end of the electric proportional valve III 109 is connected with the cooling tower 3; the water outlet end of the cooling tower 3 is connected with the water inlet end of the electric proportional valve five 302 through the Y-shaped filter 301, and the water outlet end of the electric proportional valve five 302 is connected with the cooling water tank 5; the third path is connected with the water inlet end of the electric proportional valve IV 110, and the water outlet end of the electric proportional valve IV 110 is connected with the freezing water tank 6. The Y-shaped filter 301 is used for filtering sundries or particles of the cooling tower 3 and preventing the sundries or particles of the cooling tower 3 from entering the electric proportional valve five 302 and the cooling water tank 5; the intercepted and filtered debris or particles are stored in the Y-filter 301. The Y-filter 301 can be manually detached to remove the debris and particles at regular time.
The outlet of the cooling water tank 5 is connected with the inlet of the Y-shaped filter 106, the outlet of the Y-shaped filter 106 is connected with the cooling water pump 104, the cooling water pump 104 is connected with the first electric proportional valve 105 in parallel, and the water outlet end of the cooling water pump 104 is connected with the water return end of the condenser side through the gate valve 101 to form a circulation loop of the whole condenser side water system 1. The Y-shaped filter 106 is used for filtering impurities or particles in the cooling water tank 5, preventing the impurities or particles in the cooling water tank 5 from entering the cooling water pump 104 and the condenser side water system 1, and the impurities or particles intercepted and filtered are stored in the Y-shaped filter 106, and the Y-shaped filter 106 can be manually detached at regular time to remove the impurities and the particles.
The evaporator side water system 2 comprises a gate valve 201, an electric proportional valve six 204, a chilled water pump 205, an electric proportional valve seven 206, a Y-type filter 207, an electric proportional valve eight 208, an electric proportional valve nine 209, a chilled water flow transmitter 210, a heater 211 and a chilled water tank 6; the water outlet end of the gate valve 201 is connected with the water inlet end of the chilled water flow transmitter 210, the water outlet end of the chilled water flow transmitter 210 is branched into two paths, and the first path is connected with the cooling water tank 5 through the electric proportional valve nine 209; the second path is connected with the water inlet end of the electric proportional valve eight 208, and the water outlet end of the electric proportional valve eight 208 is connected with the freezing water tank 6;
An electric proportional valve seven 206 and a heater 211 are arranged between the electric proportional valve eight 208 and the freezing water tank 6. As shown in fig. 2, the water inlet end of the electric proportional valve seven 206 is connected in parallel with the water inlet end of the electric proportional valve eight 208, the water outlet end of the electric proportional valve seven 206 is connected in series with the heater 211, and the outlet of the heater 211 is connected in parallel with the water outlet end of the electric proportional valve eight 208.
The water outlet end of the freezing water tank 6 is connected with the water inlet end of the freezing water pump 205 through the Y-shaped filter 207, the freezing water pump 205 is connected with the electric proportional valve six 204 in parallel, and the water outlet end of the freezing water pump 205 is connected with the water return end of the evaporator side through the gate valve 201, so that a circulation loop of the whole evaporator side water system 2 is formed. Similarly, the Y-filter 207 is used to filter impurities or particles in the freezing water tank 6, prevent the impurities or particles in the freezing water tank 6 from entering the freezing water pump 205 and the evaporator side water system 2, and the impurities or particles intercepted and filtered are stored in the Y-filter 207, and the Y-filter 207 can be manually detached to remove the impurities and particles at regular time.
The cooling water tank 5 is provided with a cooling water tank temperature transmitter 501, and the cooling water tank 6 is provided with a cooling water tank temperature transmitter 601.
In this embodiment, an overflow pipe 7 is connected between the cooling water tank 5 and the freezing water tank 6, so as to keep the water level between the cooling water tank 5 and the freezing water tank 6 consistent.
In this embodiment, a thermometer 102 and a pressure gauge 103 are installed on a pipe between the gate valve 101 and the cooling water flow transmitter 107, and a thermometer 102 and a pressure gauge 103 are also installed on a pipe between the cooling water pump 104 and the gate valve 101, where the thermometer 102 and the pressure gauge 103 are used to measure the temperature and pressure of water flowing in and out of the condenser side water system 1. The gate valve 101 is used for connecting and disconnecting a water inlet pipe and a water outlet pipe of the condenser side water system 1, so that a tested unit is convenient to detach and install, and a tester can operate more quickly; the thermometer 102, the pressure gauge 103 and the differential pressure gauge 8 which are connected with the water inlet pipe and the water outlet pipe of the condenser side water system 1 are used for displaying the temperature, the pressure and the differential pressure value of the water inlet and outlet of the condenser side water system 1, and a tester can intuitively record and display data.
In this embodiment, a thermometer 202 and a pressure gauge 203 are installed on the pipe between the gate valve 201 and the chilled water flow transmitter 210, and a thermometer 202 and a pressure gauge 203 are also installed on the pipe between the chilled water pump 205 and the gate valve 201, where the thermometer 202 and the pressure gauge 203 are used to measure the temperature and pressure of the water flowing into and out of the evaporator side water system 2. The gate valve 201 is used for connecting and disconnecting the water inlet and outlet pipes of the evaporator side water system 2, so that the unit to be tested is convenient to detach and install, and the operation of a tester is faster; the thermometer 202, the pressure gauge 203 and the differential pressure gauge 8 which are connected with the water inlet and outlet pipes of the evaporator side water system 2 are used for displaying the temperature, the pressure and the differential pressure value of the water inlet and outlet of the evaporator side water system 2, and a tester can intuitively record and display data.
In this embodiment, a differential pressure meter 8 is connected in series between the water inlet and outlet pipes of the condenser side water system 1, and a differential pressure meter 8 is also connected in series between the water inlet and outlet pipes of the evaporator side water system 2, so as to respectively measure the pressure difference between the water inlet and outlet of the condenser side water system 1 and the pressure difference between the water inlet and outlet of the evaporator side water system 2.
The detection and control process of the simulation detection platform of the invention is described in detail below:
1. and controlling the flow of cooling water.
Parts of the cooling water flow control part: the keyboard of the PLC self-control box 4, the cooling water pump 104, the first electric proportional valve 105 and the cooling water flow transducer 107 are electrically connected.
Starting: the cooling water flow is set through a keyboard of the PLC self-control box 4, and operation starting is determined, the PLC self-control box 4 outputs signals to the first electric proportional valve 105 and the second electric proportional valve 108, the initial opening degree of the first electric proportional valve 105 is 50%, and the opening of the second electric proportional valve 108 is 100%. After 20 seconds, the PLC self-control box 4 outputs a signal to the cooling water pump 104, the cooling water pump 104 starts to operate, the condenser side water system 1 (medium water) starts to circulate, the cooling water flow transmitter 107 transmits the signal to the PLC self-control box 4, the PLC self-control box 4 outputs the signal to the electric proportional valve I105, and the electric proportional valve I105 starts to adjust the opening degree. The cooling water flow transmitter 107 transmits signals to the PLC self-control box 4 in real time, the PLC self-control box 4 monitors and adjusts the opening of the first electric proportional valve 105 in real time, and the cooling water flow is adjusted by using the bypass principle to reach the set value of the PLC self-control box 4.
Stopping: by the keyboard stop determination of the PLC automatic control box 4, the PLC automatic control box 4 outputs a signal to the cooling water pump 104, the cooling water pump 104 stops, the condenser side water system 1 (medium water) stops circulating, and after 60 seconds, the PLC automatic control box 4 outputs a signal to the electric proportional valve I105 and the electric proportional valve II 108 to close and return to zero.
2. And controlling the flow of the chilled water.
Parts of the chilled water flow control part: the keyboard of the plc self-control box 4, the chilled water pump 205, the electric proportional valve six 204 and the chilled water flow transducer 210 are electrically connected.
Starting: the keyboard of the PLC self-control box 4 is used for setting the chilled water flow and operating and starting, the PLC self-control box 4 outputs signals to the electric proportional valve eight 208 and the electric proportional valve six 204, the opening of the electric proportional valve eight 208 is 100%, and the electric proportional valve six 204 is initially opened by 50%. After 20 seconds, the PLC self-control box 4 outputs a signal to the chilled water pump 205, the chilled water pump 205 starts to operate, the evaporator side water system 2 (medium water) starts to circulate, the chilled water flow transmitter 210 transmits the signal to the PLC self-control box 4, the PLC self-control box 4 outputs a signal to the electric proportional valve six 204, and the electric proportional valve six 204 starts to adjust the opening degree. The frozen water flow transmitter 210 transmits signals to the PLC self-control box 4 in real time, the PLC self-control box 4 monitors and adjusts the opening of the electric proportional valve six 204 in real time, and the frozen water flow is adjusted by using the bypass principle to reach the set value of the PLC control 4.
Stopping: and the keyboard of the PLC self-control box 4 stops determining, the PLC self-control box 4 outputs a signal to the chilled water pump 205, the chilled water pump 205 stops, the evaporator side water system 2 (medium water) stops circulating, and after 60 seconds, the PLC self-control box 4 outputs a signal to the electric proportional valve eight 208 and the electric proportional valve six 204 to close and return to zero.
3. And controlling the temperature of the cooling water tank.
Parts of the cooling water tank temperature control part: the PLC self-control box 4, the cooling water tank temperature transmitter 501, the electric proportional valve II 108, the electric proportional valve III 109, the cooling tower 3 and the electric proportional valve V302 are in electric signal connection.
First, the cooling water tank 5 controls the temperature range: 30-45 degrees.
In the second step, since the condenser side water system 1 of the tested unit is a heat source side and can heat up, when the condenser side water system 1 is in a circulating state and the tested unit works, the keyboard of the PLC self-control box 4 is used for controlling temperature setting and starting determination, the cooling water tank temperature transmitter 501 transmits detected data to the PLC self-control box 4, and the PLC self-control box 4 outputs signals to the electric proportional valve II 108, the electric proportional valve III 109, the electric proportional valve V302 and the cooling tower 3 so as to adjust the opening degree of the electric proportional valves 108, 109 and 302, adjust cooling water flow, and start or stop auxiliary heat dissipation of the cooling tower 3, so that the temperature of the cooling water tank 5 is balanced to be about +/-1 degree of the set value of the PLC self-control box 4.
4. And controlling the temperature of the freezing water tank.
Parts of the temperature control part of the freezing water tank: the PLC automatic control box 4, the chilled water tank temperature transmitter 601, the electric proportional valve IV 110, the electric proportional valve IV 209, the electric proportional valve IV 206, the heater 211 and the electric proportional valve IV 208 are in electric signal connection.
First step, the temperature range of the freezing water tank 6 is controlled: 7-18 degrees.
In the second step, because the evaporator side water system 2 of the tested unit is a cold source side and can cool down, when the evaporator side water system 2 is in a circulating state and the tested unit works, the keyboard of the PLC self-control box 4 is used for controlling temperature setting and starting determination, the temperature transmitter 601 of the refrigerating water box transmits detected data to the PLC self-control box 4, the PLC self-control box 4 outputs signals to the electric proportional valve IV 110, the electric proportional valve IV 209, the electric proportional valve IV 110, the electric proportional valve IV 209 and the opening degree of the electric proportional valve IV 209, the proportioning flow of cooling water and refrigerating water is regulated, the heater 211 is started or stopped, the opening degree of the electric proportional valve seven 206 and the opening degree of the electric proportional valve V208 are regulated, auxiliary heating is carried out, and the temperature of the cooling water box 6 is balanced at the set value of +/-1 degree of the PLC self-control box 4.
The specific embodiments described above are only for the purpose of illustrating the invention and are not to be construed as limiting the invention. The circuit structural design, the layout of components, the structural features, the appearance shape, the size and the like of the invention are not key technologies of the invention, are not key technical contents required to be protected, and do not affect the specific implementation process and the realization of the aim of the invention, so the invention is not illustrated in the specification one by one.
Claims (5)
1. The online simulation detection platform of the water-ground source heat pump unit is characterized by comprising a condenser side water system (1), an evaporator side water system (2), a cooling tower (3), a PLC (programmable logic controller) self-control box (4), a cooling water tank (5) and a freezing water tank (6), wherein the condenser side water system (1), the evaporator side water system (2), the cooling tower (3), the cooling water tank (5) and the freezing water tank (6) are connected through pipelines;
The condenser side water system (1) comprises a gate valve (101), a cooling water pump (104), an electric proportional valve I (105), a Y-type filter (106), a cooling water flow transmitter (107), an electric proportional valve II (108), an electric proportional valve III (109), an electric proportional valve IV (110) and a cooling water tank (5); the water outlet end of the gate valve (101) is connected with the water inlet end of the cooling water flow transmitter (107), and the water outlet end of the cooling water flow transmitter (107) is branched into three paths: the first path is connected with the water inlet end of the second electric proportional valve (108), and the water outlet end of the second electric proportional valve (108) is connected with the cooling water tank (5); the second path is connected with the water inlet end of the electric proportional valve III (109), and the water outlet end of the electric proportional valve III (109) is connected with the cooling tower (3); the water outlet end of the cooling tower (3) is connected with the water inlet end of the electric proportional valve five (302) through a Y-shaped filter (301), and the water outlet end of the electric proportional valve five (302) is connected with the cooling water tank (5); the third path is connected with the water inlet end of the electric proportional valve IV (110), and the water outlet end of the electric proportional valve IV (110) is connected with the freezing water tank (6);
The outlet of the cooling water tank (5) is connected with the inlet of the Y-shaped filter (106), the outlet of the Y-shaped filter (106) is connected with the cooling water pump (104), the cooling water pump (104) is connected with the first electric proportional valve (105) in parallel, and the water outlet end of the cooling water pump (104) is connected with the water return end of the condenser side through the gate valve (101) to form a circulation loop of the whole condenser side water system (1);
The evaporator side water system (2) comprises a gate valve (201), an electric proportional valve six (204), a chilled water pump (205), an electric proportional valve seven (206), a Y-shaped filter (207), an electric proportional valve eight (208), an electric proportional valve nine (209), a chilled water flow transmitter (210), a heater (211) and a chilled water tank (6); the water outlet end of the gate valve (201) is connected with the water inlet end of the chilled water flow transmitter (210), and the water outlet end of the chilled water flow transmitter (210) is branched into two paths: the first path is connected with a cooling water tank (5) through an electric proportional valve nine (209); the second path is connected with the water inlet end of the electric proportional valve eight (208), and the water outlet end of the electric proportional valve eight (208) is connected with the freezing water tank (6);
An electric proportional valve seven (206) and a heater (211) are arranged between the electric proportional valve eight (208) and the refrigerating water tank (6), wherein the water inlet end of the electric proportional valve seven (206) is connected with the water inlet end of the electric proportional valve eight (208) in parallel, the water outlet end of the electric proportional valve seven (206) is connected with the heater (211) in series, and the outlet of the heater (211) is connected with the water outlet end of the electric proportional valve eight (208) in parallel;
The water outlet end of the freezing water tank (6) is connected with the water inlet end of the freezing water pump (205) through a Y-shaped filter (207), the freezing water pump (205) is connected with the electric proportional valve (204) in parallel, and the water outlet end of the freezing water pump (205) is connected with the water return end of the evaporator side through a gate valve (201) to form a circulation loop of the whole evaporator side water system (2);
the cooling water tank (5) is provided with a cooling water tank temperature transmitter (501), and the cooling water tank (6) is provided with a cooling water tank temperature transmitter (601).
2. The online simulation detection platform of the water-ground source heat pump unit according to claim 1, wherein an overflow pipe (7) is connected between the cooling water tank (5) and the freezing water tank (6).
3. The online simulation detection platform of the water-ground source heat pump unit according to claim 1 or 2, wherein a thermometer (102) and a pressure gauge (103) are arranged on a pipeline between the gate valve (101) and the cooling water flow transmitter (107), and the thermometer (102) and the pressure gauge (103) are also arranged on a pipeline between the cooling water pump (104) and the gate valve (101).
4. An on-line simulation test platform of a water-ground source heat pump unit according to claim 3, wherein a thermometer (202) and a pressure gauge (203) are installed on a pipeline between the gate valve (201) and the chilled water flow transmitter (210), and a thermometer (202) and a pressure gauge (203) are also installed on a pipeline between the chilled water pump (205) and the gate valve (201).
5. The online simulation detection platform of the water-ground source heat pump unit according to claim 1, wherein a differential pressure meter (8) is connected in series between water inlet and outlet pipes of the condenser side water system (1), and the differential pressure meter (8) is also connected in series between water inlet and outlet pipes of the evaporator side water system (2).
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| CN201811512896.6A CN111307478B (en) | 2018-12-11 | 2018-12-11 | Online simulation detection platform of water ground source heat pump unit |
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| CN111307478B true CN111307478B (en) | 2024-05-07 |
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