CN113899069A - Heat exchanger assembly for energy-saving air conditioning system, controller and control method thereof - Google Patents
Heat exchanger assembly for energy-saving air conditioning system, controller and control method thereof Download PDFInfo
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- CN113899069A CN113899069A CN202111255616.XA CN202111255616A CN113899069A CN 113899069 A CN113899069 A CN 113899069A CN 202111255616 A CN202111255616 A CN 202111255616A CN 113899069 A CN113899069 A CN 113899069A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 137
- 238000000034 method Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 174
- 230000007246 mechanism Effects 0.000 claims abstract description 71
- 239000003507 refrigerant Substances 0.000 claims description 8
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 238000005265 energy consumption Methods 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a heat exchanger component for an energy-saving air conditioning system, a controller and a control method thereof, wherein the controller is arranged on a water outlet pipe of the heat exchanger component, the controller comprises a sub-controller, a central controller, a valve mechanism, a stepping motor and a flow sensor, the valve mechanism is provided with a valve core, the valve mechanism is arranged on the water outlet pipe, the stepping motor is in driving connection with the valve core of the valve mechanism, the flow sensor is arranged on a water inlet pipe, the sub-controller is respectively in control connection with the stepping motor and the flow sensor, and the central controller is in control connection with the sub-controller; the water pump can be in an operating high-efficiency area no matter the building is in a full-load state or a partial-load state, and the energy consumption of the water pump in an air-conditioning system can be greatly saved; the water flow through the heat exchanger can be monitored and controlled in real time, and the running cost of an air-conditioning water system is saved.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a heat exchanger assembly for an energy-saving air conditioning system, a controller and a control method thereof.
Background
In the operation process of an air conditioning system, especially a large central air conditioning system, the energy consumption mainly consists of three major parts: energy consumption of the air conditioner host, energy consumption of the water pump and energy consumption of the tail end equipment. The configuration of the air conditioning system main unit, the water pump, and the like is generally designed according to the maximum load of the building. Most of the time, however, air conditioning systems tend to operate at part load conditions. For an air conditioning system with a plurality of water chilling units and a plurality of water pumps, only a part of the water chilling units and the water pumps are operated in most of time. However, when a large air conditioning system is designed and selected, the specification and model of the water pump are selected according to parameters such as required lift, the number of water pumps, water flow born by a single water pump and the like, that is, the type selection flow and the lift of the water pump are determined, and the water pump is at an efficient operation point at the designed flow and lift. When the building is in a partial load state, only one water pump can be operated, and the characteristic coefficient S of the pipe network of the whole air-conditioning water system cannot be changed under the action of the differential pressure bypass valve. At this time, the operating state point of the water pump is shifted to an inefficient operating region, so that the water pump is in an inefficient operation most of the time, thereby causing a great deal of energy waste.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the heat exchanger assembly for the energy-saving air-conditioning system, the controller and the control method thereof, overcomes the defects of the problems in the prior art, and ensures that the working state point of the water pump is kept in a high-efficiency operation area under the premise of ensuring the normal operation of the system when the air-conditioning system is under partial load so as to save the energy consumption of the water pump.
The invention provides a heat exchanger component for an energy-saving air conditioning system, which comprises a heat exchanger shell, wherein a refrigerant inlet and a refrigerant outlet are arranged on the heat exchanger shell, a heat exchange tube is arranged in the heat exchanger shell, a water inlet tube orifice and a water outlet tube orifice are arranged on the heat exchanger shell, a water inlet tube communicated with one end of the heat exchange tube is arranged in the water inlet tube orifice, and a water outlet tube communicated with the other end of the heat exchange tube is arranged in the water outlet tube orifice; the water outlet pipe is provided with a controller, the controller comprises a sub-controller, a central controller, a valve mechanism, a stepping motor and a flow sensor, the valve mechanism is provided with a valve core, the valve mechanism is arranged on the water outlet pipe, the stepping motor is in driving connection with the valve core of the valve mechanism, the flow sensor is arranged on the water inlet pipe, the sub-controller is in control connection with the stepping motor and the flow sensor respectively, and the central controller is in control connection with the sub-controller.
Preferably, the outer end part of the water inlet pipe is communicated and connected with the air conditioner water inlet.
Preferably, the outer end part of the water outlet pipe is communicated and connected with the air-conditioning water outlet.
Preferably, the number of the heat exchangers is at least two, and the central controller is respectively in control connection with the sub-controllers of each heat exchanger.
Wherein each heat exchanger can belong to a different air conditioning unit, i.e. the number of units is at least two.
The invention also provides a controller for any heat exchanger component, which comprises a sub-controller, a central controller, a valve mechanism, a stepping motor and a flow sensor, wherein the valve mechanism is provided with a valve core, the valve mechanism is arranged on a water outlet pipe of the heat exchanger, the stepping motor is in driving connection with the valve core of the valve mechanism, the flow sensor is arranged on a water inlet pipe of the heat exchanger, the sub-controller is respectively in control connection with the stepping motor and the flow sensor, and the central controller is in control connection with the sub-controller.
Preferably, the sub-controllers, the valve mechanism, the stepping motor and the flow sensor form controller assemblies, the number of the controller assemblies is at least two, the controller assemblies are respectively installed on each heat exchanger, and the central controller respectively controls and connects the sub-controllers of each controller assembly.
Preferably, the flow sensor is used for acquiring water flow information of the air conditioning unit where the flow sensor is located and transmitting the water flow information to the sub-controller;
the sub-controllers are used for obtaining water flow information of the air conditioning unit where the sub-controllers are located, transmitting the water flow information and start-stop state information of the air conditioning unit where the sub-controllers are located to the central controller together, receiving an instruction sent by the central controller and sending the instruction to the stepping motor;
the central controller is used for receiving the water flow information of the air conditioning unit where the central controller is located and the start-stop state information of the air conditioning unit where the central controller is located, which are collected and sent by the sub-controllers, and sending an instruction to the sub-controllers, wherein the instruction is used for controlling the stepping motor so as to drive the valve mechanism to open, close or maintain the set flow;
the stepping motor is used for receiving an instruction from the central controller transmitted by the sub-controller and driving a valve core of the valve mechanism to realize the opening and closing of the valve mechanism or maintain the set flow;
the valve mechanism is driven by the stepping motor to adjust the state and water flow of the heat exchanger in which the valve mechanism is positioned when water flows through the heat exchanger.
Preferably, when all the air conditioning units are in an open state, the central controller is used for sending an instruction of 'full valve opening' to all the sub-controllers, and the sub-controllers are used for sending the instruction to the stepping motors so that the stepping motors execute the instruction of full valve opening; when one part of the air conditioning units is in a starting state and the other part of the air conditioning units is in a shutdown state, the central controller is used for sending an instruction of 'valve full-closed' to a sub-controller of the air conditioning units in the shutdown state, and the sub-controller sends the instruction to the stepping motor to enable the stepping motor to execute the instruction of closing the valve mechanism; meanwhile, the central controller sends an instruction of maintaining the set flow to a sub-controller of the air conditioning unit in the starting state, and the sub-controller sends the instruction to the stepping motor after receiving the instruction, so that the stepping motor adjusts the opening of the valve mechanism until the actual flow detected by the flow sensor of each air conditioning unit is maintained at the set flow value.
The invention also provides a control method of any one of the controllers, which comprises the following steps:
collecting water flow information of an air conditioning unit where the flow sensor is located through the flow sensor, and transmitting the water flow information to the sub-controller;
the method comprises the steps that water flow information of an air conditioning unit where the water flow information is located is obtained through a sub-controller, the water flow information and start-stop state information of the air conditioning unit where the water flow information is located are transmitted to a central controller together, then an instruction sent by the central controller is received, and the instruction is sent to a stepping motor;
the central controller receives the water flow information of the air conditioning unit where the central controller is located and the start-stop state information of the air conditioning unit where the central controller is located, the water flow information is collected and sent by the sub-controller, and an instruction is sent to the sub-controller, and the instruction is used for controlling the stepping motor so as to drive the valve mechanism to open, close or maintain the set flow;
the stepping motor receives an instruction from the central controller transmitted by the sub-controller and drives a valve core of the valve mechanism to realize the opening and closing of the valve mechanism or maintain the set flow;
the valve mechanism is driven by the stepping motor to adjust the state and water flow of the heat exchanger in which the valve mechanism is positioned when water flows through the heat exchanger.
Preferably, the control method of any one of the controllers further includes:
when all the air conditioning units are in an open state, sending an instruction of 'full valve opening' to all the sub-controllers through the central controller; sending the instruction to the stepping motor through the sub-controller so that the stepping motor executes the instruction of fully opening the valve;
when one part of the air conditioning units is in a starting state and the other part of the air conditioning units is in a shutdown state, sending an instruction of 'full valve closing' to a sub-controller of the air conditioning units in the shutdown state through the central controller, and sending the instruction to the stepping motor through the sub-controller so that the stepping motor executes the instruction of closing a valve mechanism; meanwhile, the central controller sends an instruction to a sub-controller of the air conditioning unit in the starting state to maintain the set flow, and the sub-controller receives the instruction and sends the instruction to the stepping motor, so that the stepping motor adjusts the opening of the valve mechanism until the actual flow detected by the flow sensor of each air conditioning unit is maintained at the set flow value.
The heat exchanger component for the energy-saving air conditioning system, the controller and the control method thereof have the advantages that:
1. when the air conditioning system is in partial load, the working state point of the water pump is kept in the high-efficiency operation area on the premise of ensuring the normal operation of the air conditioning system, so that the energy consumption of the water pump is saved.
2. The water pump can be in an operating high-efficiency area no matter the building is in a full load state or a partial load state, and the energy consumption of the water pump in the air-conditioning system can be greatly saved.
3. The controller is arranged at the water outlet pipe of the heat exchanger, so that the water flow passing through the heat exchanger can be monitored and controlled in real time, the two functional advantages can be guaranteed, the running cost of the air-conditioning water system is saved, the automation degree of the air-conditioning system is improved, and the working efficiency, the service life and the economic benefit are improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a heat exchanger assembly for an energy efficient air conditioning system according to the present invention;
fig. 2 is a performance graph of an air conditioning water system using the heat exchanger assembly for an energy saving type air conditioning system of the present invention.
In the figure, 1 is a heat exchanger shell, 2 is a refrigerant inlet, 3 is a refrigerant outlet, 4 is a water inlet pipe, 5 is a water outlet pipe, 6 is a flow sensor, 7 is a sub-controller, 8 is a central controller, 9 is a valve mechanism, 10 is a stepping motor, 11 is an air conditioner water inlet, 12 is an air conditioner water outlet, 13 is a first air conditioner unit, and 14 is a second air conditioner unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
In an air conditioning system, a plurality of water pumps are often connected in series with a plurality of air conditioning main machines so as to adapt to the change of air conditioning load of a building. The energy efficiency of the air conditioner main unit and the efficiency of the water pump are in a high-efficiency area under the design working condition. However, according to the existing heating and ventilation knowledge, the air conditioning system is in partial load operation in most of the whole year, which means that although a plurality of air conditioning main units and water pumps are configured for the building, the air conditioning main units and the water pumps which are actually required to operate are only a small part of the air conditioning main units and the water pumps because the building is in a partial load state in most of the time. For example, a certain building is provided with two water pumps and two air-conditioning hosts, but in most time periods, the air-conditioning requirements of the building can be met only by operating one air-conditioning host and one water pump. At this time, although the air conditioner tail end and the air conditioner main machine are not changed, the working state point of the water pump is changed, and the actual working state point of the water pump deviates from the designed high-efficiency point and is in a low-efficiency area. Since the building is in a partial load condition most of the time, the water pump is in a low efficiency zone most of the time, which is very energy inefficient. The invention provides the heat exchanger component for the energy-saving air conditioning system, the controller and the control method thereof, so that the water pump can be in an operating high-efficiency area no matter a building is in a full-load state or a partial-load state, and the energy consumption of the water pump in the air conditioning system can be greatly saved; the water flow through the heat exchanger can be monitored and controlled in real time, and the running cost of an air-conditioning water system is saved.
Example 1
Referring to fig. 1, the heat exchanger assembly for the energy-saving air conditioning system comprises a heat exchanger shell 1, wherein a refrigerant inlet 2 and a refrigerant outlet 3 are arranged on the heat exchanger shell 1, a heat exchange tube is arranged in the heat exchanger shell 1, a water inlet tube orifice and a water outlet tube orifice are arranged on the heat exchanger shell 1, a water inlet tube 4 communicated with one end of the heat exchange tube is arranged in the water inlet tube orifice, and a water outlet tube 5 communicated with the other end of the heat exchange tube is arranged in the water outlet tube orifice; install the controller on outlet pipe 5, the controller includes sub-controller 7, central controller 8, valve mechanism 9, step motor 10 and flow sensor 6, valve mechanism 9 sets up the case, valve mechanism 9 installs on outlet pipe 5, step motor 10 is connected with the case drive of valve mechanism 9, flow sensor 6 installs on inlet tube 4, sub-controller 7 and step motor 10 and flow sensor 6 are control connection respectively, central controller 8 and sub-controller 7 control connection.
Referring to fig. 1, in practical application, the outer end of the water inlet pipe 4 is connected to the air-conditioning water inlet 11, and the outer end of the water outlet pipe 5 is connected to the air-conditioning water outlet 12.
Referring to fig. 1, in some embodiments, the number of the heat exchangers is at least two, and the central controller 8 is in control connection with the sub-controller 7 of each heat exchanger respectively.
See fig. 1, where each heat exchanger may belong to a different air conditioning unit, i.e. the number of air conditioning units is at least two, e.g. the number of air conditioning units is two, respectively a first air conditioning unit 13 and a second air conditioning unit 14. The air-conditioning main machines of different air-conditioning units have the same model and the water pumps have the same model.
Example 2
Referring to fig. 1, the controller for any heat exchanger assembly described in embodiment 1 includes a sub-controller 7, a central controller 8, a valve mechanism 9, a stepping motor 10, and a flow sensor 6, where the valve mechanism 9 is provided with a valve core, the valve mechanism 9 is used to be installed on a water outlet pipe 5 of the heat exchanger, the stepping motor 10 drives the valve core connected to the valve mechanism 9, the flow sensor 6 is used to be installed on a water inlet pipe 4 of the heat exchanger, the sub-controller 7 is respectively connected to the stepping motor 10 and the flow sensor 6, and the central controller 8 is connected to the sub-controller 7.
Referring to fig. 1, in some embodiments, the sub-controller 7, the valve mechanism 9, the stepping motor 10, and the flow sensor 6 constitute a controller assembly, the number of the controller assemblies is at least two, the controller assemblies are respectively mounted on each heat exchanger, and the central controller 8 respectively controls the sub-controller 7 connected to each controller assembly.
In some embodiments, the flow sensor 6 is used for collecting water flow information of the air conditioning unit where the flow sensor is located and transmitting the water flow information to the sub-controller 7;
the sub-controllers 7 are used for obtaining water flow information of the air conditioning unit where the sub-controllers are located, transmitting the water flow information and start-stop state information of the air conditioning unit where the sub-controllers are located to the central controller 8 together, receiving an instruction sent by the central controller 8 and sending the instruction to the stepping motor 10;
the central controller 8 is used for receiving the water flow information of the air conditioning unit where the central controller 7 is located and the start-stop state information of the air conditioning unit where the central controller is located, which are acquired and sent by the sub-controller 7, and sending an instruction to the sub-controller 7, wherein the instruction is used for controlling the stepping motor 10 so as to drive the valve mechanism 9 to open, close or maintain the set flow;
the stepping motor 10 is used for receiving an instruction from the central controller 8 transmitted by the sub-controller 7 and driving a valve core of the valve mechanism 9 to realize the opening and closing of the valve mechanism 9 or maintain a set flow;
the valve mechanism 9 is driven by a stepping motor 10 to adjust the state of whether water passes through the heat exchanger and the water flow.
In some embodiments, when all the air conditioning units are in the open state, the central controller 8 is configured to issue an instruction "valve full open" to all the sub-controllers 7, and the sub-controllers 7 are configured to issue the instruction to the stepping motors 10, so that the stepping motors 10 execute the instruction of valve full open; when one part of the air conditioning units is in a starting state and the other part of the air conditioning units is in a shutdown state, the central controller 8 is used for sending an instruction of 'valve full-off' to the sub-controller 7 of the air conditioning units in the shutdown state, and the sub-controller 7 sends the instruction to the stepping motor 10 to enable the stepping motor 10 to execute the instruction of closing the valve mechanism 9; meanwhile, the central controller 8 sends an instruction "maintain the set flow rate" to the sub-controller 7 of the air conditioning unit in the on state, and the sub-controller 7 receives the instruction and sends the instruction to the stepping motor 10, so that the stepping motor 10 adjusts the opening degree of the valve mechanism 9 until the actual flow rate detected by the flow sensor 6 of each air conditioning unit is maintained at the set flow rate value.
Example 3
The control method of the controller according to any one of embodiment 2, which may be used to control the heat exchanger assembly for an energy saving air conditioning system according to any one of embodiment 1, includes the steps of:
collecting water flow information of an air conditioning unit where the air conditioning unit is located through a flow sensor 6, and transmitting the water flow information to a sub-controller 7;
the water flow information of the air conditioning unit where the water flow information is located is obtained through the sub-controller 7, the water flow information and the start-stop state information of the air conditioning unit where the water flow information is located are transmitted to the central controller 8 together, then the instruction sent by the central controller 8 is received, and the instruction is sent to the stepping motor 10;
the central controller 8 receives the water flow information of the air conditioning unit where the central controller 7 is located and the start-stop state information of the air conditioning unit where the central controller 7 is located, and sends an instruction to the central controller 7, wherein the instruction is used for controlling the stepping motor 10 so as to drive the valve mechanism 9 to open, close or maintain the set flow;
the stepping motor 10 receives an instruction from the central controller 8 transmitted by the sub-controller 7 and drives a valve core of the valve mechanism 9 to realize the opening and closing of the valve mechanism 9 or maintain a set flow;
the valve mechanism 9 is driven by a stepping motor 10 to adjust the state of whether water passes through the heat exchanger and the water flow.
In other embodiments, the control method of any one of the controllers further includes:
when all the air conditioning units are in an open state, sending an instruction of 'full valve opening' to all the sub-controllers 7 through the central controller 8; sending the instruction to the stepping motor 10 through the sub-controller 7, so that the stepping motor 10 executes the instruction of fully opening the valve;
when one part of the air conditioning units is in a starting state and the other part of the air conditioning units is in a shutdown state, sending an instruction of 'full valve closing' to a sub-controller 7 of the air conditioning units in the shutdown state through a central controller 8, and sending the instruction to a stepping motor 10 through the sub-controller 7, so that the stepping motor 10 executes the instruction of closing a valve mechanism 9; meanwhile, the central controller 8 sends an instruction of maintaining the set flow to the sub-controller 7 of the air conditioning unit in the on state, and the sub-controller 7 receives the instruction and sends the instruction to the stepping motor 10, so that the stepping motor 10 adjusts the opening degree of the valve mechanism 9 until the actual flow detected by the flow sensor 6 of each air conditioning unit is maintained at the set flow value.
In the heat exchanger assembly for the energy-saving air conditioning system, the controller and the control method thereof, in the actual work, for example, a certain building is provided with two air conditioning hosts with the same model and two water pumps with the same model, and the air conditioning water system is in the form of a primary pump constant flow system. The pipe network characteristic coefficient of the air-conditioning water system is s 1. At this time, the performance curve of the air-conditioning water system can be plotted in a flow-head (Q-P) coordinate system as shown in fig. 2. Under the design condition, the operating condition point of the system is the intersection point a (Q1, P1) of the water pump performance curve (water pump performance curve II) and the pipe network characteristic curve (pipe network characteristic curve I) after the two water pumps are connected in parallel, the operating condition point of the single water pump is b (Q3, P1), wherein Q3 is Q1/2, the two water pumps are both in the high-efficiency area, and the operating efficiency of the water pump is very high. When the building is in partial load, one air conditioner host and the corresponding water pump are closed, the working state point of the water pump is the intersection point c (Q2, P2) of the performance curve of the single water pump and the pipe network characteristic curve (the water pump performance curve I and the pipe network characteristic curve I), and the actual working state point of the water pump deviates from the high-efficiency area and is not energy-saving. At the moment, the actual flow of the water pump is larger than the flow under the design working condition, and the lift of the water pump is smaller than the lift under the design working condition.
In fig. 2, a curve S1 is a pipe network characteristic curve i, a curve S2 is a pipe network characteristic curve ii, a curve S3 is a water pump performance curve i, a curve S4 is a water pump performance curve ii, and a curve S is a water pump efficiency curve.
After the air-conditioning host machine adopts the heat exchanger component for the energy-saving air-conditioning system, the controller and the control method thereof, when the two air-conditioning host machines and the two water pumps run, the central controller 8 sends out an instruction, all the valves of the air-conditioning units are opened, the water flow passing through each air-conditioning unit is Q3, namely the working state point of the water pump is point b, and the water pump runs in a high-efficiency area;
when the building is in partial load, only the first air conditioning unit 13 and a corresponding water pump are started, at this time, the central controller 8 sends an instruction to the sub-controller 7 of the second air conditioning unit 14, the valve of the valve mechanism 9 is closed, and an instruction "maintain set flow" is sent to the sub-controller 7 of the first air conditioning unit 13, at this time, the sub-controller 7 adjusts the opening degree of the valve through the stepping motor 10 until the actual water flow detected by the flow sensor 6 is consistent with the set value of the water flow, at this time, the water flow flowing into the heat exchanger is Q3, that is, the working state point of the water pump is still point b. The water pump is in the high-efficient operation area.
Therefore, after the heat exchanger assembly for the energy-saving air conditioning system, the controller and the control method thereof are applied, the water pump can be in the high-efficiency operation area no matter under the full-load working condition or the partial-load working condition, and the operation energy consumption of the water pump is saved. The system is convenient for real-time monitoring and control of water flow flowing through the heat exchanger, and is suitable for the condition that an air conditioning system is configured into a plurality of air conditioning units and a plurality of water pumps.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898592A (en) * | 2021-10-27 | 2022-01-07 | 青岛腾远设计事务所有限公司 | Energy-saving water pump and using method thereof |
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| CN101782260A (en) * | 2010-01-22 | 2010-07-21 | 华中科技大学 | Optimal control method and device for water system of air conditioning |
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| CN216522314U (en) * | 2021-10-27 | 2022-05-13 | 青岛腾远设计事务所有限公司 | Heat exchanger assembly for energy-saving air conditioning system and controller thereof |
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| WO2018011761A1 (en) * | 2016-07-15 | 2018-01-18 | Barghest Building Performance Pte. Ltd. | Method for improving operational efficiency of a cooling system through retrofitting a building with a master controller |
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| CN113898592A (en) * | 2021-10-27 | 2022-01-07 | 青岛腾远设计事务所有限公司 | Energy-saving water pump and using method thereof |
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