CN209801722U - Air conditioner cooling water secondary pump variable flow system - Google Patents
Air conditioner cooling water secondary pump variable flow system Download PDFInfo
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- CN209801722U CN209801722U CN201920409696.1U CN201920409696U CN209801722U CN 209801722 U CN209801722 U CN 209801722U CN 201920409696 U CN201920409696 U CN 201920409696U CN 209801722 U CN209801722 U CN 209801722U
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Abstract
The utility model discloses an air conditioner cooling water secondary pump variable flow system, its characterized in that: the system comprises a plurality of cooling towers which are connected in parallel, wherein the water inlet end of each cooling tower is connected with a plurality of terminal unit branches which are connected in parallel, the water outlet end of each cooling tower is connected with a plurality of primary valve branches which are connected in parallel, and water returns from the primary valve branches to the terminal unit branches to form circulation; the cold source control cabinet is used for regulating the flow of each tail end unit branch, the cooling tower and each primary valve branch; the secondary pumps are respectively arranged on the branches of the cooling water to control the flow of each branch, so that the requirement of each branch on the cooling water quantity can be met; on the other hand, the resistance of the valve is changed into the power of a secondary pump, so that the problem of energy waste caused by the water valve is solved.
Description
Technical Field
The utility model belongs to building energy conservation and air conditioner water system field, concretely relates to air conditioner cooling water secondary pump variable flow system.
Background
with the continuous development of urbanization in China, the population of central cities is more and more, so that the construction of subways and other large public buildings is promoted. The air conditioning system of a large public building is complex and huge, and the proportion of the energy consumption of the whole building is also large. Generally, the operation energy consumption of the air conditioning system accounts for more than 60% of the energy consumption of the whole building, so that the energy conservation of the air conditioner is increasingly important. The large central air-conditioning system mainly comprises a cooling water system, a water chilling unit, a chilled water system and a wind system; the novel water-loop heat pump air-conditioning system and the water source multi-connected air-conditioning system are both provided with a cooling water system part and become more and more complex along with the increase of the system. The main energy consumption parts of the air-conditioning cooling water system comprise a cooling tower and a cooling water pump, and the operation energy consumption of the air-conditioning cooling water system accounts for an important proportion in the whole air-conditioning system. Therefore, the good air-conditioning cooling water system and the control method thereof have important significance for energy conservation and system stability of the air-conditioning system.
in the prior art, a primary pump constant flow system or a primary pump variable flow water system is adopted in an air-conditioning cooling water system to carry out centralized treatment and transportation and distribution on cooling water. In order to meet the cooling requirement of a condenser of a refrigeration host, the system usually controls the frequency conversion of a fan of a cooling tower through the approximation degree of the outdoor wet bulb temperature and controls the frequency conversion of a primary pump (a cooling water pump) through the temperature difference of supply and return water, thereby achieving the purpose of energy-saving operation. For a large air conditioning system with a plurality of refrigeration hosts, a plurality of water-loop heat pump units and a plurality of water source multi-connected air conditioning hosts, the requirement of each unit on cooling water can only be realized through the balance of valves and pipe networks on each branch pipe; the problems that the flow of cooling water is difficult to adjust according to needs, the distribution is unbalanced, the temperature difference of mixture is reduced, the total flow overflows and the like exist inevitably, and the great waste of the transmission and distribution energy is caused. In addition, because the valve is a resistance component, the reduction of the opening of the valve can increase the resistance of the pipeline system, and the power consumption of the water pump is increased under the condition of the same flow; therefore, the energy waste is realized by controlling the cooling water flow balance through the valve.
SUMMERY OF THE UTILITY MODEL
Aiming at least one of the defects or the improvement requirements in the prior art, the utility model provides an air conditioner cooling water secondary pump variable flow system, which can meet the requirements of each branch on the amount of cooling water by respectively arranging a secondary pump on each branch of cooling water to control the flow of each branch; on the other hand, the resistance of the valve is changed into the power of a secondary pump, so that the problem of energy waste caused by the water valve is solved.
in order to achieve the above object, according to an aspect of the present invention, there is provided an air conditioner cooling water secondary pump variable flow rate system, wherein: the system comprises a plurality of cooling towers which are connected in parallel, wherein the water inlet end of each cooling tower is connected with a plurality of terminal unit branches which are connected in parallel, the water outlet end of each cooling tower is connected with a plurality of primary valve branches which are connected in parallel, and water returns from the primary valve branches to the terminal unit branches to form circulation; the cold source control cabinet is used for regulating the flow of each tail end unit branch, the cooling tower and each primary valve branch;
Each primary valve branch is provided with a primary valve and a first water valve;
a first temperature sensor is arranged on a cooling water return pipe between the cooling tower and the primary valve branch;
A second pressure sensor is arranged on a cooling water supply pipe between the cooling tower and the tail end unit branch;
A first pressure sensor, a fourth temperature sensor and a first flow sensor are arranged on a cooling water return pipe between the primary valve branch and the tail end unit branch;
Each end unit branch is provided with a secondary pump, a second temperature sensor, a second flow sensor and a second water valve;
and a third water valve is arranged on a balance pipe between the cooling water supply pipe and the cooling water return pipe at two ends of the branch of the tail end unit.
preferably, each cooling tower comprises a cooling tower fan, the water inlet end of each cooling tower branch is provided with a second water valve, and the water outlet end of each cooling tower branch is provided with a fifth water valve;
Preferably, the air conditioner cooling water secondary pump variable flow rate system further comprises a humidity sensor and a third temperature sensor which are arranged outdoors.
Preferably, the cold source control cabinet comprises a first power supply air switch, a primary pump control device, a cooling tower fan control device, a first water valve control device, a second water valve control device, a fifth water valve control device, a primary pump frequency converter, a cooling tower fan frequency converter, a first water valve actuator, a second water valve actuator and a fifth water valve actuator.
Preferably, the first temperature sensor, the third temperature sensor, the humidity sensor, the first pressure sensor, the second pressure sensor, the third water valve and the first flow sensor are electrically connected with the cold source control cabinet, and transmit a temperature signal, a humidity signal, a pressure signal, a water valve opening and closing signal and a flow signal to the cooling tower fan control device, the primary pump control device, the first water valve control device, the second water valve control device and the fifth water valve control device in the cold source control cabinet;
Preferably, the cooling tower fan frequency converter, the cooling tower fan, the first water valve actuator, the second water valve actuator and the fifth water valve actuator are electrically connected with the cold source control cabinet; the frequency converter of the cooling tower fan receives a control signal output by the fan control device and controls the frequency conversion of the cooling tower fan;
preferably, the primary pump frequency converter receives the control signal output by the primary pump control device and controls the frequency conversion of the primary pump;
preferably, the first water valve actuator receives a control signal output by the first water valve control device and controls the on-off of the water valve;
preferably, the second water valve actuator receives a control signal output by the second water valve control device to control the on-off of the second water valve;
preferably, the fifth water valve actuator receives the control signal output by the fifth water valve control device and controls the opening and closing of the water valve;
Preferably, the first power air switch controls the power input of each component of the main control cabinet.
preferably, the end control cabinet comprises a second power supply air switch, a secondary pump control device, a third water valve control device, a fourth water valve control device, a secondary pump frequency converter, a third water valve actuator and a fourth water valve actuator;
preferably, the second temperature sensor, the second flow sensor, the fourth temperature sensor and the first flow sensor are electrically connected with the tail end control cabinet, and transmit temperature signals and flow signals to the secondary pump control device, the third water valve control device and the fourth water valve control device in the tail end control cabinet;
Preferably, the secondary pump frequency converter, the second water valve and the third water valve are electrically connected with the tail end control cabinet; the secondary pump frequency converter receives a control signal output by the secondary pump control device and controls the frequency conversion of the secondary pump;
Preferably, the third water valve actuator receives a control signal output by the third water valve control device to control the on-off of the second water valve;
preferably, the fourth water valve actuator receives a control signal output by the fourth water valve control device to control the on-off of the third water valve;
preferably, the second power air switch controls the power input of each component of the main control cabinet.
the above-described preferred features may be combined with each other as long as they do not conflict with each other.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, has following beneficial effect:
1. The utility model discloses an air conditioner cooling water secondary pump variable flow system replaces terminal water valve with the secondary pump, utilizes the power of water pump to adjust the flow on the branch pipe, has eliminated the local resistance of terminal water valve, especially in different form system, has avoided the energy consumption that the near-end water valve brought, has reduced the lift of primary pump simultaneously, has finally reached the purpose that reduces the transmission and distribution system consumption. On the other hand, the system control strategy carries out frequency conversion adjustment and number control on the water pumps, overcomes the defect of small temperature difference and large water volume in the transmission and distribution system, and further reduces the power consumption of the transmission and distribution system; meanwhile, the optimal cooling tower outlet water temperature is determined according to outdoor meteorological parameters, the cooling tower fan is subjected to variable frequency adjustment, the refrigeration performance of the tail end unit is improved, and the system is enabled to operate in a more energy-saving state. Meanwhile, the primary pump, the secondary pump and the cooling tower fan are respectively controlled by respectively utilizing the supply and return water pressure difference on the main pipe, the supply and return water temperature difference on the tail end branch and the cooling water return water temperature, so that the accuracy and the timeliness of a control strategy are ensured.
2. The utility model discloses an air conditioner cooling water secondary pump variable flow system, terminal unit type is diversified, can be for multiple water-cooling type units such as water-cooled cooling water set, water-cooling cabinet-type air conditioner, water ring heat pump air conditioning unit, water source multi-connected air conditioner host computer, has extensive suitability.
3. The utility model discloses an air conditioner cooling water secondary pump variable flow system utilizes the power of water pump to adjust the flow on the branch pipe, can satisfy each end to the dynamic demand of cooling water yield, simultaneously, has eliminated the local resistance of terminal water valve, especially in different form system, has avoided the energy consumption that the near-end water valve brought to reduce the lift of primary pump, finally reached the purpose that reduces the transmission and distribution system consumption.
4. the utility model discloses an air conditioner cooling water secondary pump variable flow volume system, primary pump, secondary pump adopt frequency conversion regulation and number of stations control, have overcome the drawback of the big water yield of the little difference in temperature in the transmission and distribution system, have further reduced the consumption of transmission and distribution system.
5. the utility model discloses an air conditioner cooling water secondary pump variable flow volume system according to outdoor meteorological parameter, confirms the best cooling tower leaving water temperature, carries out frequency conversion regulation to the cooling tower fan to the refrigeration performance of terminal unit has been improved, makes the system be in and moves under more energy-conserving state.
6. the utility model discloses an air conditioner cooling water secondary pump variable flow system sets up temperature sensor on terminal unit pipeline, sets up temperature sensor on the cooling tower outlet pipe, sets up pressure sensor on supplying the return water main pipe, utilizes supplying the return water difference in temperature, supplying return water pressure difference and cooling water return water temperature on the terminal branch road to control primary pump, secondary pump and cooling tower fan respectively, has guaranteed the accuracy and the ageing of control.
To sum up, the air conditioner cooling water secondary pump variable flow system of the utility model has diversified types of end units and wide applicability; the method for adjusting by replacing the valve with the secondary pump and the frequency conversion technology reduce the power consumption of the transmission and distribution system; the optimal cooling tower outlet water temperature is determined according to outdoor meteorological parameters, so that the refrigeration performance of the tail end unit is improved, and the system is operated in a more energy-saving state; meanwhile, each device is controlled by utilizing independent parameters, so that the control accuracy and timeliness are ensured; the air conditioner cooling water secondary pump variable flow system has wide applicability, obvious technical advancement, obvious economy and strong practicability, and must have wide market application prospect.
drawings
Fig. 1 is the principle schematic diagram of the air conditioner cooling water secondary pump variable flow system of the utility model.
Detailed Description
in order to make the objects, technical solutions and advantages of the present invention more clearly understood, 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. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The present invention will be described in further detail with reference to the following embodiments.
as a preferred embodiment of the present invention, as shown in fig. 1, the utility model provides an air conditioner cooling water secondary pump variable flow system includes primary pump 1, first water valve 3, first temperature sensor 4, cooling tower fan 5, second water valve 7, first pressure sensor 8, second pressure sensor 9, third water valve 10, cold source switch board 11, second temperature sensor 15, secondary pump 17, second water valve 19, end control cabinet 21, humidity transducer 22, third temperature sensor 23, fifth water valve 32, fourth temperature sensor 35, second flow sensor 36, first flow sensor 37.
The cold source control cabinet 11 comprises a first power supply air switch 12, a primary pump control device 13, a cooling tower fan control device 14, a first water valve control device 24, a second water valve control device 25, a fifth water valve control device 33, a primary pump frequency converter 2, a cooling tower fan frequency converter 6, a first water valve actuator 26, a second water valve actuator 27 and a fifth water valve actuator 34.
The end control cabinet 21 comprises a second power supply air switch 18, a secondary pump control device 20, a third water valve control device 28, a fourth water valve control device 30, a secondary pump frequency converter 16, a third water valve actuator 29 and a fourth water valve actuator 31.
In the cold source control cabinet 11, the first temperature sensor 4, the third temperature sensor 23, the humidity sensor 22, the first pressure sensor 8, the second pressure sensor 9, the third water valve 10, and the first flow sensor 37 are electrically connected to the cold source control cabinet 11, and transmit a temperature signal, a humidity signal, a pressure signal, a water valve opening/closing signal, and a flow signal to the cooling tower fan control device 14, the primary pump control device 13, the first water valve control device 24, the second water valve control device 25, and the fifth water valve control device 33 in the cold source control cabinet 11. The cooling tower fan frequency converter 6, the cooling tower fan 5, the first water valve actuator 26, the second water valve actuator 27 and the fifth water valve actuator 34 are electrically connected with the cold source control cabinet 11. The cooling tower fan frequency converter 6 receives the control signal output by the fan control device 14 and controls the frequency conversion of the cooling tower fan 5. The primary pump frequency converter 2 receives a control signal output by the primary pump control device 13 to control the frequency conversion of the primary pump 1, the first water valve actuator 26 receives the control signal output by the first water valve control device 24 to control the opening and closing of the water valve 3, the second water valve actuator 27 receives the control signal output by the second water valve control device 25 to control the opening and closing of the second water valve 7, and the fifth water valve actuator 34 receives the control signal output by the fifth water valve control device 33 to control the opening and closing of the water valve 32. The first power air switch 12 controls the power input to the various components of the main control cabinet 11.
in the end control cabinet 21, the second temperature sensor 15, the second flow sensor 36, the fourth temperature sensor 35, and the first flow sensor 37 are electrically connected to the end control cabinet 21, and transmit temperature signals and flow signals to the secondary pump control device 20, the third water valve control device 28, and the fourth water valve control device 30 in the end control cabinet 21. The secondary pump frequency converter 16, the second water valve 19 and the third water valve 10 are electrically connected with the tail end control cabinet 21. The secondary pump frequency converter 16 receives a control signal output by the secondary pump control device 20 to control the frequency conversion of the secondary pump 17, the third water valve actuator 29 receives a control signal output by the third water valve control device 28 to control the opening and closing of the second water valve 19, and the fourth water valve actuator 31 receives a control signal output by the fourth water valve control device 30 to control the opening and closing of the third water valve 10. The second power air switch 18 controls the power input to the various components of the main control cabinet 21.
the specific control method comprises the following steps:
when the device is started, after one or more terminal units receive an operation signal, the second water valve 19 on the branch where the terminal unit is located and the third water valve 10 on the balance pipe are started, and the secondary pump 17 on the branch where the terminal unit is located is started after a certain time (default 1s) is delayed. And (3) opening a second water valve 7 at the water inlet end of the cooling tower, a fifth water valve 32 at the water outlet end and a first water valve 3 of the primary pump, delaying for a certain time (default 1s), and opening the primary pump 1 after confirming that the third water valve 10 on the balance pipe is in place. And after the second water valve 7 at the water inlet end and the fifth water valve 32 at the water outlet end of the cooling tower are opened in place, starting the fan 5 of the cooling tower. And starting the terminal unit needing to operate and the corresponding chilled water system.
And secondly, when the device stops, closing the running terminal unit, delaying a certain time (default 10s) to close the fan 5 of the cooling tower, delaying a certain time (default 180s) to close the primary pump 1 and the secondary pump 17, delaying a certain time (default 120s) to close the chilled water system, after confirming that the secondary pump 17 is closed, closing the second water valve 19 on the branch, and after confirming that the primary pump 1 is closed, closing the second water valve 7 at the water inlet end of the cooling tower, the fifth water valve 32 at the water outlet end and the first water valve 3 of the primary pump.
and thirdly, when the device works, the tail end control cabinet 21 receives temperature signals of the second temperature sensor 15 arranged on the branch pipe where the secondary pump is located and the fourth temperature sensor 35 arranged on the cooling water return pipe, calculates the temperature difference of supply and return water, the secondary pump control device 20 outputs a control signal, and the operation frequency of the secondary pump 17 is controlled through the secondary pump frequency converter 16. When the temperature difference of the water supply and return of the branch pipe is higher than a set value (default 5.5 ℃), the operation frequency of the secondary pump 17 is increased by a certain value (default 0.5Hz) after the condition is continuously met for a certain time (default 20 s); when the temperature difference of the supply water and the return water of the branch pipe is lower than a set value (default 4.5 ℃), the operation frequency of the secondary pump 17 is reduced by a certain value (default 0.5Hz) after the condition is continuously met for a certain time (default 20 s).
and fourthly, when the device works, the cold source control cabinet 11 receives pressure signals of the first pressure sensor 8 arranged on the cooling water return pipe and the second pressure sensor 9 arranged on the cooling water supply pipe, calculates the water supply and return pressure difference, the primary pump control device 13 outputs a control signal, and the operation frequency of the primary pump 1 is controlled through the primary pump frequency converter 2. When the pressure difference of the supplied water and the returned water is higher than a set value (default 5Pa), and the condition is continuously met for a certain time (default 20s), the operation frequency of the primary pump 1 is increased by a certain value (default 0.5 Hz); when the pressure difference of the supplied water and the returned water is lower than a set value (default-5 Pa), and the condition is continuously met for a certain time (default 20s), the operation frequency of the primary pump 1 is reduced by a certain value (default 0.5 Hz).
And when the device works, the cold source control cabinet 11 receives a flow signal of the first flow sensor 37 arranged on the cooling water return pipe, compares the flow signal with a plurality of preset flow values (for example, the preset values are m1, m2 and m3 … mn from large to small, and respectively correspond to the water supply capacity of one, two and three … n primary pumps), and the primary pump control device 13 outputs a control signal to control the starting and stopping of the primary pump 1 through the primary pump frequency converter 2. If the total cooling water amount is larger than a certain preset value (for example, in the case that only two primary pumps are in operation, the total cooling water amount is larger than m2, namely the water supply capacity of the two primary pumps is exceeded), after the condition is continuously met for a certain time (default 20s), one primary pump 1 is added for operation, and the first water valve 3 of the primary pump is interlocked and opened. If the total cooling water amount is less than a certain preset value (for example, the total cooling water amount is less than m1 under the condition that only two primary pumps are in operation, namely one primary pump can meet the water supply requirement), one primary pump 1 is closed, and the first water valve 3 of the primary pump is closed in an interlocking mode.
sixthly, when the device works, the cold source control cabinet 11 receives a temperature signal of a third temperature sensor 23 arranged outdoors, a humidity signal of a humidity sensor 22 and a temperature signal of a first temperature sensor 4 arranged on a water outlet pipe of the cooling tower, calculates the optimal cooling tower outlet water temperature which is equal to the outdoor air wet bulb temperature plus a certain value (default 2.5 ℃), calculates the difference value between the cooling tower outlet water temperature and the optimal cooling tower outlet water temperature, and outputs a control signal by the cooling tower fan control device 14 to control the operating frequency of the cooling tower fan 5 through the cooling tower fan frequency converter 6. When the difference value is higher than a set value (default 0.5 ℃), and the condition is continuously met for a certain time (default 10s), the operating frequency of the cooling tower fan 5 is increased by a certain value (default 5 Hz); the difference value is lower than a set value (default-0.5 ℃), after the condition is continuously met for a certain time (default 20s), the operating frequency of the cooling tower fans 5 is reduced by a certain value (default 5Hz), and all the cooling tower fans 5 adopt a frequency coherence mode. When the temperature of the outlet water of the cooling tower is lower than the set value (default 18 ℃), the fans 5 of the cooling tower are all closed.
and seventhly, when the device works, the tail end control cabinet 21 receives a flow signal of the first flow sensor 37 arranged on the branch, the secondary pump control device 20 outputs a control signal, and the running frequency of the secondary pump 17 is controlled through the secondary pump frequency converter 16. When the flow rate of the branch is lower than a set value (default is 50% of the rated flow rate of the tail end unit), the running frequency of the secondary pump 17 is increased by a certain value (default is 0.5 Hz).
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. the utility model provides an air conditioner cooling water secondary pump variable flow system which characterized in that: the system comprises a plurality of cooling towers which are connected in parallel, wherein the water inlet end of each cooling tower is connected with a plurality of terminal unit branches which are connected in parallel, the water outlet end of each cooling tower is connected with a plurality of primary valve branches which are connected in parallel, and water returns from the primary valve branches to the terminal unit branches to form circulation; the cold source control cabinet is used for regulating the flow of each tail end unit branch, the cooling tower and each primary valve branch;
Each primary valve branch is provided with a primary valve and a first water valve;
A first temperature sensor is arranged on a cooling water return pipe between the cooling tower and the primary valve branch;
a second pressure sensor is arranged on a cooling water supply pipe between the cooling tower and the tail end unit branch;
A first pressure sensor, a fourth temperature sensor and a first flow sensor are arranged on a cooling water return pipe between the primary valve branch and the tail end unit branch;
Each end unit branch is provided with a secondary pump, a second temperature sensor, a second flow sensor and a second water valve;
And a third water valve is arranged on a balance pipe between the cooling water supply pipe and the cooling water return pipe at two ends of the branch of the tail end unit.
2. The air conditioner cooling water secondary pump variable flow system of claim 1, characterized in that:
Each cooling tower comprises a cooling tower fan, a second water valve is arranged at the water inlet end of each cooling tower branch, and a fifth water valve is arranged at the water outlet end of each cooling tower branch.
3. The air conditioner cooling water secondary pump variable flow system of claim 1, characterized in that:
The air conditioner cooling water secondary pump variable flow system further comprises a humidity sensor and a third temperature sensor which are arranged outdoors.
4. the air conditioner cooling water secondary pump variable flow system of claim 1, characterized in that:
The cold source control cabinet comprises a first power supply air switch, a primary pump control device, a cooling tower fan control device, a first water valve control device, a second water valve control device, a fifth water valve control device, a primary pump frequency converter, a cooling tower fan frequency converter, a first water valve actuator, a second water valve actuator and a fifth water valve actuator.
5. the air conditioner cooling water secondary pump variable flow system of claim 4, characterized in that:
The first temperature sensor, the third temperature sensor, the humidity sensor, the first pressure sensor, the second pressure sensor, the third water valve and the first flow sensor are electrically connected with the cold source control cabinet, and a temperature signal, a humidity signal, a pressure signal, a water valve opening and closing signal and a flow signal are transmitted to the cooling tower fan control device, the primary pump control device, the first water valve control device, the second water valve control device and the fifth water valve control device in the cold source control cabinet.
6. the air conditioner cooling water secondary pump variable flow system of claim 4, characterized in that:
the cooling tower fan frequency converter, the cooling tower fan, the first water valve actuator, the second water valve actuator and the fifth water valve actuator are electrically connected with the cold source control cabinet; the frequency converter of the cooling tower fan receives a control signal output by the fan control device and controls the frequency conversion of the cooling tower fan;
the primary pump frequency converter receives the control signal output by the primary pump control device and controls the frequency conversion of the primary pump;
The first water valve actuator receives the control signal output by the first water valve control device and controls the switch of the water valve;
The second water valve actuator receives the control signal output by the second water valve control device and controls the on-off of the second water valve;
The fifth water valve actuator receives the control signal output by the fifth water valve control device and controls the opening and closing of the water valve;
the first power supply air switch controls the power supply input of each part of the main control cabinet.
7. the air conditioner cooling water secondary pump variable flow system of claim 1, characterized in that:
the end control cabinet comprises a second power supply air switch, a secondary pump control device, a third water valve control device, a fourth water valve control device, a secondary pump frequency converter, a third water valve actuator and a fourth water valve actuator.
8. the air conditioner cooling water secondary pump variable flow system of claim 7, characterized in that:
The second temperature sensor, the second flow sensor, the fourth temperature sensor and the first flow sensor are electrically connected with the tail end control cabinet, and temperature signals and flow signals are transmitted to the secondary pump control device, the third water valve control device and the fourth water valve control device in the tail end control cabinet;
the secondary pump frequency converter, the second water valve and the third water valve are electrically connected with the tail end control cabinet; the secondary pump frequency converter receives a control signal output by the secondary pump control device and controls the frequency conversion of the secondary pump;
The third water valve actuator receives the control signal output by the third water valve control device and controls the switch of the second water valve;
the fourth water valve actuator receives the control signal output by the fourth water valve control device and controls the opening and closing of the third water valve;
and the second power supply air switch controls the power supply input of each part of the main control cabinet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920409696.1U CN209801722U (en) | 2019-03-28 | 2019-03-28 | Air conditioner cooling water secondary pump variable flow system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920409696.1U CN209801722U (en) | 2019-03-28 | 2019-03-28 | Air conditioner cooling water secondary pump variable flow system |
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| CN209801722U true CN209801722U (en) | 2019-12-17 |
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| CN201920409696.1U Active CN209801722U (en) | 2019-03-28 | 2019-03-28 | Air conditioner cooling water secondary pump variable flow system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945460A (en) * | 2019-03-28 | 2019-06-28 | 中铁第四勘察设计院集团有限公司 | A kind of air conditioning cooling water secondary pump variable volume system and control method |
| CN113531703A (en) * | 2021-06-30 | 2021-10-22 | 广东汉维科技有限公司 | Efficient energy-saving cooling water system for subway central air-conditioning cold water machine room |
-
2019
- 2019-03-28 CN CN201920409696.1U patent/CN209801722U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945460A (en) * | 2019-03-28 | 2019-06-28 | 中铁第四勘察设计院集团有限公司 | A kind of air conditioning cooling water secondary pump variable volume system and control method |
| CN113531703A (en) * | 2021-06-30 | 2021-10-22 | 广东汉维科技有限公司 | Efficient energy-saving cooling water system for subway central air-conditioning cold water machine room |
| CN113531703B (en) * | 2021-06-30 | 2022-07-01 | 广东汉维科技有限公司 | Control method of cooling water system for subway central air-conditioning cold water machine room |
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