CN209782928U - Energy-saving variable-frequency water pump control system - Google Patents
Energy-saving variable-frequency water pump control system Download PDFInfo
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- CN209782928U CN209782928U CN201920550170.5U CN201920550170U CN209782928U CN 209782928 U CN209782928 U CN 209782928U CN 201920550170 U CN201920550170 U CN 201920550170U CN 209782928 U CN209782928 U CN 209782928U
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- water pump
- energy
- regulating valve
- differential pressure
- control system
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 238000005057 refrigeration Methods 0.000 claims abstract description 38
- 230000001105 regulatory effect Effects 0.000 claims abstract description 33
- 230000003068 static effect Effects 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Abstract
The utility model relates to an energy-conserving variable frequency water pump control system belongs to air conditioner water pump equipment technical field, including refrigeration host computer, water pump and switch board, each end equipment is connected through the water pump to the refrigeration host computer, the water pump passes through water pump converter connection control cabinet, the refrigeration host computer is connected to switch board one end, and the other end still is connected with pressure differential regulating valve, branch road governing valve and pressure differential sensor, the upper reaches position of each terminal branch road is provided with static balance valve, and the low reaches position is provided with branch road governing valve and pressure differential balance valve, through this kind of structural design, can effectually set up pressure differential sensor in the tail end part that is close to equipment to the operation of reasonable control water pump, great saving the energy consumption of water pump, and whole process is automatic to accomplish, safe and reliable, it is.
Description
Technical Field
The utility model belongs to the technical field of air conditioner water pump equipment, in particular to energy-conserving variable frequency water pump control system.
Background
in modern society, air conditioners are essential household appliances in most of our country in winter and summer, and then, as is well known, air conditioners belong to household appliances with relatively high energy consumption in all household appliances.
in various costs of operation of the air conditioning system, the water pump occupies a very large proportion, so that energy conservation of the water pump is always the focus of current research, and the main research directions are as follows: type selection optimization, system optimization and frequency conversion control. Wherein, frequency conversion control is the mainstream research direction of energy-conserving water pump now, and with air conditioner refrigeration trade as an example, conventional energy-conserving mode is: the cold water provided by the frequency conversion refrigeration host is conveyed to each tail end of the system through the water pump, and the operating frequency of the water pump is controlled by the differential pressure sensor. As shown in fig. 1, for a schematic diagram of a conventional variable frequency control system of a water pump at present, the differential pressure sensor 15 is installed at two ends of a main water supply and return pipe (111 and 112), theoretically, the closer the differential pressure sensor 15 is to the tail end of the equipment, the more energy is saved, but actually, in field installation, it is very difficult to find the proper installation position of the differential pressure sensor at the tail end of the equipment, and the wiring of the differential pressure sensor is also very difficult when the differential pressure sensor is installed at the tail end, so that the conventional variable frequency water pump is installed with the differential pressure sensor at two ends of the main water supply and return pipe, which causes that the energy consumption of the conventional water pump is always high.
SUMMERY OF THE UTILITY MODEL
In order to overcome prior art's defect, the utility model provides an energy-conserving frequency conversion water pump control system, through setting up switch board, pressure differential regulating valve and pressure differential sensor, the water supply main line of refrigeration host computer connects every end through the static balance valve on every branch road, then every end is through branch road regulating valve and pressure differential balance valve connection refrigeration host computer's return water main line. This kind of scheme can be with pressure differential sensor reasonable setting in the rear end of equipment to the problem among the prior art has been solved.
The technical scheme for realizing the purpose is as follows:
The utility model provides an energy-saving variable frequency water pump control system, which comprises a refrigeration host, a water pump and a plurality of terminals, wherein the plurality of terminals comprise a terminal 1, a terminal 2 and a terminal 3 … …, and the terminal 1, the terminal 2 and the terminal 3 … … are all connected in parallel;
The water supply main line of the refrigeration host is connected with the plurality of tail ends through a water pump, each tail end forms a branch, and the tail ends are connected with the water return main line of the refrigeration host through the downstream of the branch; the water supply main line of the refrigeration host is also connected with a differential pressure regulating valve and a differential pressure sensor through a water pump, and the other ends of the differential pressure regulating valve and the differential pressure sensor are both connected with a water return main line of the refrigeration host;
The water pump is further connected with a water pump frequency converter, the water pump frequency converter is connected with a control cabinet, and the control cabinet is connected with the refrigeration host machine.
Further, the pressure difference regulating valve is an electric pressure difference regulating valve.
Further, the pressure difference regulating valve is arranged at the front end of the plurality of tail ends.
Further, the differential pressure sensor is close to the tail ends of the plurality of tail ends.
Further, static balance valves are arranged at the upstream positions of the branches at the tail ends.
Furthermore, branch regulating valves and differential pressure balance valves are further arranged on branches at the tail ends of the plurality of the branch pipes, and the tail ends of the plurality of the branch pipes are connected with a water return main line of the refrigeration host through the branch regulating valves and the differential pressure balance valves in sequence.
furthermore, the differential pressure regulating valve, the branch regulating valve and the differential pressure sensor are all electrically connected with the control cabinet.
Further, the water pump is electrically connected with the water pump frequency converter, the water pump frequency converter is electrically connected with the control cabinet, and the control cabinet is electrically connected with the refrigeration host machine.
Has the advantages that: compared with the prior art, the utility model discloses a difference lies in, the utility model provides a pair of energy-conserving variable frequency water pump control system, through switch board, pressure differential regulating valve and pressure differential sensor, the water supply main road of refrigeration host computer connects every end through the static balance valve on every branch road, thereby every end forms circulation circuit through the return water main road that branch road regulating valve and pressure differential balance valve connect the refrigeration host computer. This kind of connected mode can be with differential pressure sensor setting in the relative more position that is close to the tail end, the energy consumption of reduction water pump that can be fine, and whole control process is automatic to be accomplished, safe and reliable.
Drawings
Fig. 1 is a schematic diagram of a conventional water pump frequency conversion control system in the prior art.
Fig. 2 is a schematic view of the energy-saving variable frequency water pump control system according to a preferred embodiment of the present invention.
Detailed Description
The invention will be further explained with reference to the drawings and the specific embodiments.
Referring to fig. 1, the utility model provides an energy-saving variable frequency water pump control system, including refrigeration host 11, water pump 12 and a plurality of end 13, a plurality of end 13 include end 1, end 2, end 3 … … end n, end 1, end 2, end 3 … … end n are parallel connection;
The water supply main line 111 of the refrigeration host 11 is connected with the plurality of tail ends 13 through a water pump 12, each tail end forms a branch, and the plurality of tail ends 13 are connected with the water return main line 112 of the refrigeration host 11 through the downstream of the branch; the water supply main line 111 of the refrigeration host 11 is also connected with a differential pressure regulating valve 14 and a differential pressure sensor 15 through a water pump 12, and the other ends of the differential pressure regulating valve 14 and the differential pressure sensor 15 are both connected with a water return main line 115 of the refrigeration host 11;
The water pump 12 is further connected with a water pump frequency converter 121, the water pump frequency converter 121 is connected with a control cabinet 10, and the control cabinet 10 is connected with the refrigeration host 11.
preferably, but not limited to, the differential pressure regulating valve 14 is an electric differential pressure regulating valve.
Preferably, but not limited to, said differential pressure regulating valve 14 is provided at the front end of said several terminals 13.
preferably, but not limited to, said differential pressure sensor 15 is close to the tail end of said several terminals 13.
Preferably, but not in a limiting way, the branches of said several ends 13 are each provided with a static balancing valve 16 in a position upstream of them.
Preferably, but not limited to, a branch regulating valve 17 and a differential pressure balancing valve 18 are further disposed on a branch of the plurality of terminals 13, and the plurality of terminals 13 are all connected to the water return main line 112 of the refrigeration main machine 11 sequentially through the branch regulating valve 17 and the differential pressure balancing valve 18.
Preferably, but not limited to, the differential pressure regulating valve 14, the branch regulating valve 17 and the differential pressure sensor 15 are all electrically connected with the control cabinet 10.
Preferably, but not limited to, the water pump 12 is electrically connected to the water pump frequency converter 121, the water pump frequency converter 121 is electrically connected to the control cabinet 10, and the control cabinet 10 is electrically connected to the refrigeration host 11.
specifically, the refrigeration main machine 11 supplies the produced chilled water to each end 13 once through the water pump 12, and then returns to the water return main line 112 of the refrigeration main machine 11 after heat exchange is performed at the ends 13, so as to realize a circulation process.
when the system is debugged after project construction is completed in each tail end 13 branch, the static balance valve 16 of each tail end 13 is adjusted to enable each tail end 13 to reach the designed flow, after the system is operated, changes of outdoor temperature, indoor personnel and the like can cause changes of indoor load, namely changes of indoor temperature, after the control cabinet 10 monitors changes of the room temperature, signals are transmitted to the branch adjusting valve 17, the opening degree of the branch adjusting valve 17 changes, and the room temperature adjusting process is completed through changes of the flow of the tail ends. In the process, the pressure difference balancing valve 18 of each end 13 can bear the pressure difference change of each branch, so that the sum of the pressure differences of both ends of each end 13 and the branch regulating valve 17 of the corresponding branch is kept constant. The water pump frequency converter 121 can perform frequency conversion operation, and changes of system flow and lift are realized by taking chilled water supply and return water pressure difference monitored by the pressure difference sensor 15 as frequency conversion regulation basis. In locating the differential pressure sensor 15, the user needs to be consulted to obtain a partial load rate range of system operation. Assuming that the partial load rate of the system is 40% -70%, a hydraulic pressure diagram of 40%, 50%, 60% and 70% of the system load rate needs to be calculated and drawn in sequence. For the drawn water pressure diagram, the system is under-flowed before the arrangement position of the differential pressure sensor 15, the system is over-flowed after the arrangement position, but for the over-flow part, whether the differential pressure balance valve 18 can bear redundant differential pressure needs to be verified, and for the under-flow part, whether the branch can reach the required flow after the differential pressure balance valve 18 releases all differential pressure needs to be verified, if so, the fact that the differential pressure sensor 15 is installed at the branch is proved to be feasible. Firstly, arranging a differential pressure sensor 15 in a branch where a tail end n is located, and verifying whether installation of the differential pressure sensor 15 is feasible or not, wherein if the installation is feasible, the installation is the optimal arrangement position of the differential pressure sensor 15; if not, arranging a differential pressure sensor 15 in the branch where the tail end n-1 is positioned, and verifying whether the position is feasible; if it is still not feasible, the differential pressure sensor 15 is arranged in the branch of the terminal n-2, and so on until this position is feasible.
The flow of the refrigeration host 11 can not be adjusted steplessly, the efficiency is very low when the flow of the water pump 12 is too low, in order to ensure the lowest operation flow of the refrigeration host 11 and the water pump 12 and ensure the lowest required flow of the tail end, a pressure difference adjusting valve 14 is designed between the water supply and return pipelines, when the lowest operation flow of the refrigeration host 11 and the water pump 12 is greater than the required flow of the tail end, the pressure difference adjusting valve 14 is opened, and partial refrigeration water supply does not participate in heat exchange and directly flows through the pressure difference adjusting valve 14.
The above embodiments are merely preferred embodiments of the present disclosure, which are not intended to limit the present disclosure, and any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present disclosure, should be included in the scope of the present disclosure.
Claims (8)
1. The utility model provides an energy-conserving frequency conversion water pump control system, includes refrigeration host computer, water pump and a plurality of end, its characterized in that:
The water supply main line of the refrigeration host is connected with the plurality of tail ends through a water pump, each tail end forms a branch, and the tail ends are connected with the water return main line of the refrigeration host through the downstream of the branch; the water supply main line of the refrigeration host is also connected with a differential pressure regulating valve and a differential pressure sensor through a water pump, and the other ends of the differential pressure regulating valve and the differential pressure sensor are both connected with a water return main line of the refrigeration host;
the water pump is further connected with a water pump frequency converter, the other end of the water pump frequency converter is connected with a control cabinet, and the control cabinet is connected with the refrigeration host.
2. the energy-saving variable-frequency water pump control system according to claim 1, characterized in that:
The pressure difference regulating valve is an electric pressure difference regulating valve.
3. The energy-saving variable-frequency water pump control system according to claim 1, characterized in that:
the pressure difference regulating valve is arranged at the front ends of the plurality of tail ends.
4. The energy-saving variable-frequency water pump control system according to claim 1, characterized in that:
the differential pressure sensor is close to the tail ends of the plurality of tail ends.
5. The energy-saving variable-frequency water pump control system according to claim 1, characterized in that:
And static balance valves are arranged at the upstream positions of the branches at the tail ends of the plurality of branches.
6. The energy-saving variable-frequency water pump control system according to claim 1, characterized in that:
The branch at the tail ends of the plurality of the refrigerating main machines are also provided with a branch regulating valve and a differential pressure balancing valve, and the tail ends of the plurality of the refrigerating main machines are connected with a water return main line of the refrigerating main machine sequentially through the branch regulating valve and the differential pressure balancing valve.
7. The energy-saving variable-frequency water pump control system according to claim 6, characterized in that:
the pressure difference regulating valve, the branch regulating valve and the pressure difference sensor are all electrically connected with the control cabinet.
8. the energy-saving variable-frequency water pump control system according to claim 1, characterized in that:
The water pump is electrically connected with the water pump frequency converter, the water pump frequency converter is electrically connected with the control cabinet, and the control cabinet is electrically connected with the refrigeration host machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920550170.5U CN209782928U (en) | 2019-04-22 | 2019-04-22 | Energy-saving variable-frequency water pump control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920550170.5U CN209782928U (en) | 2019-04-22 | 2019-04-22 | Energy-saving variable-frequency water pump control system |
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| Publication Number | Publication Date |
|---|---|
| CN209782928U true CN209782928U (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920550170.5U Expired - Fee Related CN209782928U (en) | 2019-04-22 | 2019-04-22 | Energy-saving variable-frequency water pump control system |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594903A (en) * | 2020-05-28 | 2020-08-28 | 南京百源通能源技术有限公司 | Hydraulic balance control system and hydraulic balance control method |
| CN112880121A (en) * | 2021-01-22 | 2021-06-01 | 珠海格力电器股份有限公司 | Air conditioner water system terminal pressure difference control method and device, storage medium and air conditioner |
| CN114198832A (en) * | 2021-12-21 | 2022-03-18 | 宁波奥克斯电气股份有限公司 | Air conditioning system, constant-current energy-saving control method and variable-current energy-saving control method |
-
2019
- 2019-04-22 CN CN201920550170.5U patent/CN209782928U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594903A (en) * | 2020-05-28 | 2020-08-28 | 南京百源通能源技术有限公司 | Hydraulic balance control system and hydraulic balance control method |
| CN112880121A (en) * | 2021-01-22 | 2021-06-01 | 珠海格力电器股份有限公司 | Air conditioner water system terminal pressure difference control method and device, storage medium and air conditioner |
| CN114198832A (en) * | 2021-12-21 | 2022-03-18 | 宁波奥克斯电气股份有限公司 | Air conditioning system, constant-current energy-saving control method and variable-current energy-saving control method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191213 |