CN110928225B - Modular water machine system and control method thereof - Google Patents
Modular water machine system and control method thereof Download PDFInfo
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- CN110928225B CN110928225B CN201911222559.8A CN201911222559A CN110928225B CN 110928225 B CN110928225 B CN 110928225B CN 201911222559 A CN201911222559 A CN 201911222559A CN 110928225 B CN110928225 B CN 110928225B
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- 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
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- 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
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a module water machine system and a control method thereof, wherein a variable-frequency water pump is adopted to replace a traditional water pump, the output power of the variable-frequency water pump is controlled and regulated according to the actual start-stop state of each module water machine unit, the condition of excessive output power of the variable-frequency water pump is effectively avoided, the aim of saving energy is effectively achieved, and the running cost of the module water machine system is further reduced; meanwhile, the water inlet branch pipe of each module water machine unit is provided with a first control valve, when the module water machine unit is stopped, the corresponding first control valve is closed, so that water can be prevented from flowing into the stopped module water machine unit, heat exchange is not directly converged to the water side, and the heat exchange efficiency and quality of the module water machine system are effectively improved.
Description
Technical Field
The invention relates to the technical field of module water machine systems, in particular to a module water machine system and a control method thereof.
Background
At present, a modular water machine system is generally formed by mutually and parallelly installing a plurality of modular water machine units, and water at a water supply side flows through each modular water machine unit for heat exchange and then is converged to a water use side; when the water temperature of the water side approaches to the set temperature, a part of the module water machine units are required to be closed so as to achieve the aim of energy conservation; after the partial module water machine unit is closed, the output power of the water pump required by the module water machine system is reduced, and the situation of excessive output power of the water cup can occur because the output power of the water pump is a fixed value, so that the energy saving purpose can not be achieved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a modular water machine system which effectively plays a role in energy conservation and a control method thereof.
In order to achieve the above purpose, the present invention provides the following solutions: the module water machine system comprises a plurality of module water machine units, a water inlet main pipe connected with a water inlet side and a water outlet main pipe connected with the water inlet side, wherein the module water machine units are respectively connected with the water inlet main pipe through a water inlet branch pipe, and the module water machine units are respectively connected with the water outlet main pipe through a water outlet branch pipe; the water inlet main pipe is provided with a flowmeter and a variable-frequency water pump, and each water inlet branch pipe is provided with a first control valve capable of controlling the water inlet branch pipe to be cut off or switched on.
Further, each water outlet branch pipe is provided with a second control valve capable of controlling the water outlet branch pipe to be cut off or switched on.
Further, the first control valve and the second control valve are electromagnetic valves.
According to the control method based on the module water machine system, the current output power of the variable-frequency water pump is controlled according to the starting quantity M of the current module water machine units and the current actual water flow K2 detected by the flowmeter.
Further, the starting number M of the current module water machine units is detected, the current total refrigerating capacity Q of the module water machine system is determined according to the starting number M of the current module water machine units, the current water flow K1 required to be achieved by the water inlet main pipe is determined according to the current total refrigerating capacity Q of the module water machine system, and the output power of the variable-frequency water pump is controlled and adjusted based on the comparison between the current water flow K1 required to be achieved by the water inlet main pipe and the current actual water flow K2 detected by the flowmeter.
Further, the determining the current total refrigeration capacity Q of the modular water turbine system according to the number M of the current modular water turbine units includes: and determining the current total refrigerating capacity Q of the module water machine system according to a formula Q=N×M, wherein N is the refrigerating capacity of a single module water machine unit, and M is the starting number of the current module water machine unit.
Further, the "determining the current water flow K1 to be achieved by the water inlet main pipe according to the current total refrigeration Q of the modular water machine system" includes: and determining the current water flow K1 required to be achieved by the water inlet main pipe according to a formula K1=Q×X, wherein Q is the current total refrigerating capacity of the modular water machine system, and X is a preset parameter value.
Further, the preset parameter value X is 0.172.
Further, the "controlling and adjusting the output power of the variable frequency water pump based on the comparison of the current water flow K1 required to be achieved by the water inlet main pipe and the current actual water flow K2 detected by the flowmeter" includes: and if K2 < (K1 is 90%), controlling the output power of the variable-frequency water pump to be increased, if K2 > (K1 is 110%), controlling the output power of the variable-frequency water pump to be reduced, and if K1 is 90%) < K2 < (K1 is 110%), keeping the output power of the variable-frequency water pump unchanged.
Further, the method comprises the steps of: and detecting the start-stop state of each current module water machine unit to control the corresponding first control valve to be opened and closed correspondingly.
Compared with the prior art, the variable-frequency water pump has the beneficial effects that the variable-frequency water pump is adopted to replace the traditional water pump, the output power of the variable-frequency water pump is controlled and regulated according to the actual start-stop state of each module water machine unit, the condition that the output power of the variable-frequency water pump is excessive is effectively avoided, the purpose of energy saving is effectively achieved, and the running cost of a module water machine system is further reduced; meanwhile, the water inlet branch pipe of each module water machine unit is provided with a first control valve, when the module water machine unit is stopped, the corresponding first control valve is closed, so that water can be prevented from flowing into the stopped module water machine unit, heat exchange is not directly converged to the water side, and the heat exchange efficiency and quality of the module water machine system are effectively improved.
Drawings
FIG. 1 is a schematic diagram of a modular water machine system according to the present invention.
The device comprises a 1-module water machine unit, a 2-water inlet main pipe, a 3-water outlet main pipe, a 4-water inlet branch pipe, a 5-water outlet branch pipe, a 6-flowmeter, a 7-variable frequency water pump, an 8-first control valve and a 9-second control valve.
Detailed Description
The invention is further illustrated by the following examples:
referring to fig. 1, the present embodiment is a modular water machine system, including four modular water machine units 1, a water inlet main pipe 2 connected to a water inlet side, and a water outlet main pipe 3 connected to a water outlet side, wherein the water inlet side is a water source, and the water outlet side is a water storage device such as a hot water tank or a water storage device such as an indoor faucet; the four module water machine sets 1 are respectively connected with the water inlet main pipe 2 through a water inlet branch pipe 4, and the four module water machine sets 1 are respectively connected with the water outlet main pipe 3 through a water outlet branch pipe 5; the main water inlet pipe 2 is connected with a flowmeter 6 and a variable-frequency water pump 7 in series, and each water inlet branch pipe 4 is provided with a first control valve 8 which can control the water inlet branch pipe to be cut off or switched on;
in this embodiment, the modular water turbine system further includes a controller, and the controller is connected with the flowmeter 6, the variable-frequency water pump 7 and each modular water turbine unit 1 in a wired or wireless manner;
further, the present embodiment also provides a control method for controlling the above-mentioned modular water machine system, where the control method is stored in a controller of the modular water machine system in a program form, and when the modular water machine system works, the program is executed by the controller to implement control and adjustment of the current output power of the variable frequency water pump 7 according to the current opening number M of the modular water machine set 1 and the current actual water flow K2 detected by the flowmeter 6, and includes the following steps:
detecting the starting quantity M of the current module water machine set 1, determining the current total refrigerating capacity Q of the module water machine system according to the starting quantity M of the current module water machine set 1, and particularly determining the current total refrigerating capacity Q of the module water machine system according to a formula Q=N×M, wherein N is the refrigerating capacity of a single module water machine set 1, and M is the starting quantity of the current module water machine set 1;
determining a current water flow K1 required to be achieved by the main water inlet pipe 2 according to a current total refrigerating capacity Q of the modular water machine system, specifically determining the current water flow K1 required to be achieved by the main water inlet pipe 2 according to a formula K1=Q×X, wherein Q is the current total refrigerating capacity of the modular water machine system, X is a preset parameter value, a specific value of X is 0.172, and the value is obtained through multiple experiments;
based on the comparison of the current water flow K1 required to be achieved by the main water inlet pipe 2 and the current actual water flow K2 detected by the flowmeter 6, the output power of the variable-frequency water pump 7 is controlled and adjusted, specifically, if K2 < (K1 is 90%), the output power of the variable-frequency water pump 7 is controlled to be increased, if K2 > (K1 is 110%), the output power of the variable-frequency water pump 7 is controlled to be reduced, and if (K1 is 90%) < K2 < (K1 is 110%), the output power of the variable-frequency water pump 7 is kept unchanged;
the above steps are repeated in a continuous cycle to continuously adjust the output power of the variable frequency water pump 7.
In this embodiment, when the controller detects the on-off state of each current module water machine set 1 to control the corresponding first control valve 8 to be opened and closed accordingly, specifically, the first control valve 8 on the water inlet branch pipe 4 corresponding to the module water machine set 1 in the on-state is in an on state, and the first control valve 8 on the water inlet branch pipe 4 corresponding to the module water machine set 1 in the off state is in an off state, so that water can be prevented from flowing into the stopped module water machine set 1 without heat exchange and directly converging to the water side, and heat exchange efficiency and quality of the module water machine system are effectively improved.
In this embodiment, each water outlet branch pipe 5 is provided with a second control valve 9 capable of controlling the cut-off or the conduction of the water outlet branch pipe, and the opening control logic of the second control valve 9 is consistent with that of the corresponding first control valve 8, that is, when the water inlet branch pipe 4 and the first control valve 8 and the second control valve 9 on the water outlet branch pipe 5 corresponding to the water inlet branch pipe 4 and the water outlet branch pipe 5 of the same water machine unit 1 are synchronously closed for the same water machine unit 1, the water in the water outlet main pipe 3 is effectively prevented from flowing back into the water machine unit 1 in a shutdown state by closing the second control valve 9.
In the present embodiment, the first control valve 8 and the second control valve 9 are each specifically an electromagnetic valve.
In addition, it should be noted that, in the specific embodiments described in the present specification, names of various parts and the like may be different, and all equivalent or simple changes of the structures, features and principles described in the conception of the present invention are included in the protection scope of the present invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the invention as defined in the accompanying claims.
Claims (3)
1. A control method of a modular water machine system is characterized in that: the module water machine system comprises a plurality of module water machine units (1), a water inlet main pipe (2) connected with a water inlet side and a water outlet main pipe (3) connected with a water outlet side, wherein the module water machine units (1) are respectively connected with the water inlet main pipe (2) through a water inlet branch pipe (4), and the module water machine units (1) are respectively connected with the water outlet main pipe (3) through a water outlet branch pipe (5); the method is characterized in that: a flowmeter (6) and a variable-frequency water pump (7) are arranged on the main water inlet pipe (2), and a first control valve (8) capable of controlling the water inlet branch pipes (4) to be cut off or switched on is arranged on each water inlet branch pipe; each water outlet branch pipe (5) is provided with a second control valve (9) which can control the water outlet branch pipes to be cut off or switched on;
the control method comprises the following steps:
detecting the starting number M of the current module water machine units (1), determining the current total refrigerating capacity Q of the module water machine system according to the starting number M of the current module water machine units (1), determining the current water flow K1 required to be achieved by the water inlet main pipe (2) according to the current total refrigerating capacity Q of the module water machine system, and controlling and adjusting the output power of the variable-frequency water pump (7) based on the comparison between the current water flow K1 required to be achieved by the water inlet main pipe (2) and the current actual water flow K2 detected by the flowmeter (6);
detecting the start-stop state of each current module water machine set (1) to control the corresponding first control valve (8) to be correspondingly opened and closed, wherein,
the step of determining the current total refrigerating capacity Q of the module water machine system according to the starting quantity M of the current module water machine set (1) comprises the following steps: determining the current total refrigerating capacity Q of the module water machine system according to a formula Q=N×M, wherein N is the refrigerating capacity of a single module water machine unit (1), and M is the opening number of the current module water machine unit (1);
the step of determining the current water flow K1 required to be achieved by the water inlet main pipe (2) according to the current total refrigerating capacity Q of the modular water machine system comprises the following steps: determining the current water flow K1 required to be achieved by the main water inlet pipe (2) according to a formula K1=Q X, wherein Q is the current total refrigerating capacity of the modular water machine system, and X is a preset parameter value;
the step of controlling and adjusting the output power of the variable-frequency water pump (7) based on the comparison of the current water flow K1 required to be achieved by the main water inlet pipe (2) and the current actual water flow K2 detected by the flowmeter (6) comprises the following steps: and if K2 < (K1 x 90%), controlling the output power of the variable frequency water pump (7) to be increased, if K2 > (K1 x 110%), controlling the output power of the variable frequency water pump (7) to be reduced, and if K1 x 90%) < K2 < (K1 x 110%), keeping the output power of the variable frequency water pump (7) unchanged.
2. A control method of a modular water machine system according to claim 1, characterized by: the preset parameter value X is 0.172.
3. A control method of a modular water machine system according to claim 1, characterized by: the first control valve (8) and the second control valve (9) are electromagnetic valves.
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| CN201911222559.8A CN110928225B (en) | 2019-12-03 | 2019-12-03 | Modular water machine system and control method thereof |
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