CN112413815B - Air conditioning system - Google Patents
Air conditioning system Download PDFInfo
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- CN112413815B CN112413815B CN202011255155.1A CN202011255155A CN112413815B CN 112413815 B CN112413815 B CN 112413815B CN 202011255155 A CN202011255155 A CN 202011255155A CN 112413815 B CN112413815 B CN 112413815B
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- heat exchange
- exchange unit
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
Abstract
The invention discloses an air conditioning system, comprising: the system comprises a pipeline, a hydraulic module, a plurality of heat exchange unit modules, a detection module and a controller, wherein the hydraulic module is arranged on the pipeline and used for supplying water circulation power, the heat exchange unit modules are connected with the pipeline in parallel, the detection module is connected with a user side of the pipeline and used for detecting the operation parameters of each heat exchange unit module, and the controller is used for determining the operation state of each heat exchange unit module according to the operation parameters and controlling the hydraulic module to adjust the water supply flow and/or adjust the operation parameters of the heat exchange unit modules. According to the method, the abnormal type of the current water system is judged by collecting the temperature information of the water system and the state parameters of the flow switches of the modules, then, aiming at different abnormalities, adjustment measures are made, and the temperature setting and adjustment are carried out on a normally-operated unit aiming at the condition that part of the modules are stopped but water is still kept to be supplied; aiming at the condition that part of modules are cut off, frequency adjustment is carried out on the water pump; through the adjustment measures, normal operation of other units can still be ensured when part of modules are abnormal.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to an air conditioning system.
Background
The air-conditioning water system has the condition that one hydraulic module is used as a power source of the whole waterway system and supplies water to a plurality of water cooling unit modules simultaneously, the modules often operate independently, and if one or more modules are in fault shutdown or manual shutdown, if the whole system is not adjusted, the stable operation of other normal modules is influenced.
Disclosure of Invention
The invention provides an air conditioning system for solving the technical problem that the system cannot be automatically adjusted when a part of water chiller modules are abnormal in the prior art.
The technical scheme adopted by the invention is as follows:
the present invention provides an air conditioning system, comprising: the system comprises a pipeline, a hydraulic module, a plurality of heat exchange unit modules, a detection module and a controller, wherein the hydraulic module is arranged on the pipeline and used for supplying water circulation power, the heat exchange unit modules are connected with the pipeline in parallel, the detection module is connected with a user side of the pipeline and used for detecting the operation parameters of each heat exchange unit module, and the controller is used for determining the current operation state of each heat exchange unit module according to the operation parameters and controlling the hydraulic module to adjust the water supply flow and/or adjust the operation parameters of the heat exchange unit modules.
In a first embodiment, the detection module comprises: and the flow detection module is used for detecting the state parameters of the flow switches of the heat exchange unit modules.
The operation state of each heat exchange unit module comprises the following steps: normal operating conditions and shut-off conditions; and when the flow switch of the heat exchange unit module is in an open state, the normal operation state is judged, and when the flow switch of the heat exchange unit module is in an off state, the cutoff state is judged.
Further, the controller adjusting the supply water flow rate includes: calculating the number N of the heat exchange unit modules in the cutoff state, and adjusting the water pump frequency Fp of the hydraulic module according to a formula, wherein the formula is Fp = Fp _ max (1-N/N), Fp _ max is the preset maximum operating frequency of the water pump, and N is the number of the heat exchange unit modules.
In a second embodiment, the detection module further comprises: and the temperature detection module is used for detecting the water supply temperature of the user side and the water inlet and outlet temperatures of the heat exchange unit modules.
The current operating state of each heat exchanger unit module further comprises: a shutdown standby state; the flow switch state of the heat exchange unit module is in an open state, and when the water inlet and outlet temperature difference of the heat exchange unit module is greater than a first threshold value corresponding to the heat exchange unit module, the normal operation state is judged, and when the water inlet and outlet temperature difference of the heat exchange unit module is smaller than the first threshold value corresponding to the heat exchange unit module, the shutdown standby state is judged.
When the difference value between the water supply temperature at the user side and the preset target temperature of the user is larger than a second threshold value, the controller resets the heat exchange target temperature of the heat exchange unit module in the normal operation state, and the reset heat exchange target temperature is the difference value between the original heat exchange target temperature and the first threshold value.
When the difference value between the water supply temperature of the user side and the preset target temperature of the user is smaller than a second threshold value or the heat exchange target temperature is reset, the controller controls the detection module to detect the water temperature information again, and the running state of the heat exchange unit module is completely reset to be a normal running state.
Preferably, the heat exchanger unit module is a water chiller unit module.
Further, the hydraulic module comprises two water pumps connected in parallel, and the controller adjusts the water supply flow by adjusting the operating frequency of the water pumps.
Compared with the prior art, the method has the advantages that the abnormal type of the current water system is judged by collecting the temperature information of the water system and the state information of the flow switches of the modules, the targeted adjustment measures are taken according to different abnormalities, and the temperature setting adjustment is carried out on the normally operated unit according to the condition that part of the modules are stopped but water is still kept to be supplied; aiming at the condition that part of modules are cut off, frequency adjustment is carried out on the water pump; through the adjustment measures, normal operation of other units can be still ensured and the original expected requirements of users can be met when part of modules are abnormal.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic structural diagram in an embodiment of the present invention;
FIG. 2 is a control block diagram in an embodiment of the invention;
FIG. 3 is a flowchart illustrating the control of the temperature determination unit according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a control procedure of the flow rate determining unit according to an embodiment of the present invention;
fig. 5 is a control flow chart of the load decision unit according to the embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The principles and construction of the present invention will be described in detail below with reference to the drawings and examples.
As shown in fig. 1, the present invention provides an air conditioning system including: the system comprises a pipeline, a hydraulic module, a user side, a heat exchange unit module, a detection module and a controller. The pipeline is a circulating pipeline, and the hydraulic module is arranged on the pipeline and provides power for water circulation in the pipeline. The heat exchanger unit modules are connected in parallel on the heat exchange section on the pipeline and can exchange heat for water in the heat exchange section of the pipeline. The pipeline passes through the water supply end of the user side, and the water after heat exchange can be supplied to the user for refrigeration or heating. The detection module can detect the temperature difference of inlet and outlet water of the heat exchange unit module and the water supply temperature of the user side and the on-off state parameter of the water flow switch, the controller can know the running state of each heat exchange unit module through the on-off state parameter and the temperature parameter, the controller can control the hydraulic module to adjust the water supply flow according to the running state of each heat exchange unit module, at the moment, the water flow of other normal running modules can be increased, the water temperature difference can be reduced, the requirement on the water supply temperature can not be met, the frequency of the water pump needs to be reduced, and the water flow of the water path system is reduced. This application when the running state of heat exchanger unit module changes the water supply flow of water module adjustment pipeline, guarantee that user side water supply temperature is normal steady, furthest satisfies customer's normal demand.
In one embodiment, the detection module specifically includes: the flow detection module, the flow switch parameter of each heat exchanger unit module of flow detection module detectable, during flow switch off-state, the water in the pipeline does not pass through this heat exchanger unit module, and this heat exchanger unit module is in the cutout state, and this kind of condition mainly appears when this module of manual cutting off supplies water (for example maintain, overhaul, maintenance etc.).
The current operation state of each heat exchange unit module comprises the following steps: the heat exchanger unit module is judged to be in a normal running state when the flow switch state of the heat exchanger unit module is in an opening state, and is judged to be in a cutoff state when the flow switch state of the heat exchanger unit module is in the cutoff state.
The controller adjusts the water supply flow specifically as follows: counting the number N of the heat exchange unit modules in the cutoff state, adjusting the water pump frequency Fp of the hydraulic module according to a formula, wherein the formula is Fp = Fp _ max (1-N/N), Fp _ max is the preset maximum operating frequency of the water pump, N is the number of the heat exchange unit modules, and rounding off the calculated water pump frequency Fp. After a flow switch in the system is actuated, the controller can automatically control the water pump frequency of the hydraulic module, so that the water supply flow in the pipeline is matched with the heat exchange unit module in a normal running state.
As shown in fig. 2, in the second embodiment:
the controller specifically includes: the device comprises a temperature judging unit, a flow switch judging unit and a load decision unit, wherein the temperature judging unit is used for judging whether the heat exchange unit module is in a shutdown standby state or not according to the temperature, and the flow switch judging unit is used for judging whether the heat exchange unit module is in a disconnected state or not according to the state of the flow switch.
The detection module specifically includes: flow detection module, temperature detection module, flow detection module are used for detecting the flow switch state of each heat exchanger unit module, and when flow switch off-state, the water in the pipeline does not pass through this heat exchanger unit module and carries out the heat transfer. The temperature detection module is used for detecting the water inlet temperature and the water outlet temperature of each heat exchange unit module and the water supply temperature of a user side, and the temperature judgment unit obtains the water inlet temperature and the water outlet temperature to obtain the water inlet temperature difference and the water outlet temperature difference of each heat exchange unit module through calculation.
The current operation state of each heat exchange unit module comprises the following steps: normal running state, stop standby state and current-cut state.
As shown in fig. 4, when the flow switch state of the heat exchanger unit module is an off state, it is determined as an off state, and the number of the module in the off state is sent to the load decision unit. And when the flow switch state of the heat exchange unit module is in an open state and the temperature difference between the inlet water and the outlet water of the heat exchange unit module is greater than a first threshold value T1 corresponding to the heat exchange unit module, judging that the heat exchange unit module is in a normal operation state. And when the water inlet and outlet temperature difference of the heat exchange unit module is smaller than a first threshold value T1 set corresponding to the heat exchange unit module, the heat exchange unit module is judged to be in a shutdown standby state.
As shown in fig. 3, the specific control flow of the temperature determination unit is as follows:
the target water supply temperature is preset by a user, and the temperature detection module starts to detect the water inlet temperature Ti (k), the water outlet temperature to (k) and the water supply temperature Ta on the user side of each heat exchange unit module.
Calculating the water inlet and outlet temperature difference dT (k) = Ti (k) = to (k) to (k) of each heat exchange unit module, judging whether the water inlet and outlet temperature difference dT (k) of each heat exchange unit module is lower than a first threshold value T1, judging the heat exchange unit module lower than the first threshold value T1 to be in a shutdown standby state, and sending the number corresponding to the module in the shutdown standby state to a load decision unit by a temperature judgment unit.
And calculating the deviation dTa = Ta-Tt between the water supply temperature Ta and the target water supply temperature Tt preset by the user, judging whether dTa is higher than a second threshold value T2, if dTa is higher than the second threshold value, indicating that the current water supply temperature Tt is higher than an expected value and the refrigerating capacity of the system is lower than an expected value, and sending a capacity shortage signal to a load decision unit by a judgment unit.
As shown in fig. 5, the specific control flow of the load decision unit is as follows:
the load decision unit marks the module number transmitted by the temperature judgment unit as a shutdown standby state module, marks the unit transmitted by the flow judgment unit as a cutoff state module, and marks other numbers as normal operation state modules.
The load decision unit judges whether the capacity insufficiency signal is received or not, if not, the load decision unit controls the temperature detection module to detect the water temperature again, and all module marks are reset to be the normal operation state module; if the target temperature is received, sending an output signal of target temperature resetting to all the heat exchange unit modules in the normal operation state, wherein the target temperature Tt = Tt-dTa reset by each heat exchange unit module, namely, the deviation dTa is reduced on the basis of the original target temperature setting, and the operation power of the heat exchange unit modules is improved to meet the refrigeration requirement. The water temperature is then re-sensed and all module flags reset to normal run status modules.
And simultaneously calculating the number N of the cut-off operation modules, and sending a water pump frequency setting signal to a water pump of the hydraulic module, wherein the new water pump frequency setting value is Fp = Fp _ max (1-N/N), and rounding. The water temperature is then re-sensed and all module flags reset to normal run status modules. Make discharge correspond heat exchanger unit module and adjust, avoid the too big heat transfer that leads to of flow insufficient, can not satisfy the cooling demand.
In a preferred embodiment, the heat exchange unit module is a water cooling unit module, the hydraulic module comprises two water pumps connected in parallel, the controller adjusts the water supply flow rate by adjusting the operating frequency of the water pumps, one of the two variable frequency water pumps is a standby water pump, and the operating life can be prolonged by manually switching.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. An air conditioning system comprising: the system comprises a pipeline, a hydraulic module arranged on the pipeline, a plurality of heat exchange unit modules arranged on the pipeline in parallel, and a controller, wherein the user side of the pipeline is connected; the detection module comprises: the flow detection module is used for detecting the state parameters of the flow switches of the heat exchange unit modules; the temperature detection module is used for detecting the water supply temperature of the user side and the water inlet and outlet temperatures of the heat exchange unit modules;
the operation state of each heat exchange unit module comprises the following steps: a normal running state, a cutoff state and a shutdown standby state;
judging the flow switch of the heat exchange unit module to be in a cutoff state when the flow switch is in an off state;
when the flow switch state of the heat exchange unit module is an open state and the temperature difference between the inlet water and the outlet water of the heat exchange unit module is greater than a first threshold value set corresponding to the heat exchange unit module, the heat exchange unit module is judged to be in a normal operation state;
the flow switch state of the heat exchange unit module is an open state, and the heat exchange unit module is judged to be in a shutdown standby state when the temperature difference between inlet water and outlet water of the heat exchange unit module is smaller than a first threshold value set corresponding to the heat exchange unit module;
when the difference value between the water supply temperature at the user side and the preset target temperature of the user is larger than a second threshold value, the controller resets the heat exchange target temperature of the heat exchange unit module which is judged to be in the normal operation state, and the reset heat exchange target temperature is the difference value between the water supply temperature at the user side and the preset target temperature of the user subtracted from the original heat exchange target temperature.
2. The air conditioning system of claim 1, wherein the controller adjusting the flow of the supply water comprises: calculating the number N of the heat exchange unit modules in the cutoff state, and adjusting the water pump frequency Fp of the hydraulic module according to a formula, wherein the formula is Fp = Fp _ max (1-N/N), Fp _ max is the preset maximum operating frequency of the water pump, and N is the number of the heat exchange unit modules.
3. The air conditioning system of claim 1, wherein the controller controls the detection module to detect the water temperature information again and resets the operation state of the heat exchanger set module to a normal operation state when the difference between the user side water supply temperature and the user preset target temperature is less than a second threshold or the heat exchange target temperature is reset.
4. The air conditioning system of claim 1, wherein the heat exchanger unit module is a chiller unit module.
5. The air conditioning system of claim 1, wherein the hydro module comprises two water pumps connected in parallel, and the controller adjusts the flow rate of the supply water by adjusting the operating frequency of the water pumps.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011255155.1A CN112413815B (en) | 2020-11-11 | 2020-11-11 | Air conditioning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011255155.1A CN112413815B (en) | 2020-11-11 | 2020-11-11 | Air conditioning system |
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| CN112413815A CN112413815A (en) | 2021-02-26 |
| CN112413815B true CN112413815B (en) | 2021-10-26 |
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| CN202011255155.1A Active CN112413815B (en) | 2020-11-11 | 2020-11-11 | Air conditioning system |
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| CN115623764B (en) * | 2022-12-19 | 2023-03-21 | 浙江德塔森特数据技术有限公司 | AI and data flow-based data center equipment operation abnormity analysis method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203810598U (en) * | 2014-04-11 | 2014-09-03 | 中南建筑设计院股份有限公司 | Primary pump multi-condition variable flow system |
| CN111356338A (en) * | 2020-02-26 | 2020-06-30 | 平安科技（深圳）有限公司 | Cold volume and flow combined cold machine switching control system, method, equipment and medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102132174B1 (en) * | 2018-10-23 | 2020-07-09 | 한국해양대학교 산학협력단 | A central heating and cooling system according to the prediction of damage of a heat exchanger, and it's control method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203810598U (en) * | 2014-04-11 | 2014-09-03 | 中南建筑设计院股份有限公司 | Primary pump multi-condition variable flow system |
| CN111356338A (en) * | 2020-02-26 | 2020-06-30 | 平安科技（深圳）有限公司 | Cold volume and flow combined cold machine switching control system, method, equipment and medium |
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