CN213873293U - Water chilling unit - Google Patents
Water chilling unit Download PDFInfo
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- CN213873293U CN213873293U CN202022947649.8U CN202022947649U CN213873293U CN 213873293 U CN213873293 U CN 213873293U CN 202022947649 U CN202022947649 U CN 202022947649U CN 213873293 U CN213873293 U CN 213873293U
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Abstract
The utility model discloses a water chilling unit, which comprises an outdoor heat exchange assembly, an indoor heat exchange assembly and at least one variable frequency water pump, wherein the variable frequency water pump, the outdoor heat exchange assembly and the indoor heat exchange assembly are communicated through a pipeline; and a water pressure sensor in signal connection with the variable-frequency water pump is also arranged in the pipeline. The utility model discloses an above-mentioned setting, because every heat exchanger unit all is provided with headstock gear to can be solitary cut off or communicate with the pipeline, can open the heat exchanger unit of corresponding quantity according to actual load's size, the water pressure in the pipeline also reaches corresponding pressure value this moment, converts this pressure value into the signal of telecommunication of control variable frequency water pump through water pressure sensor, thereby reaches the effect of adjusting variable frequency water pump frequency, energy consumption when reducing the low load.
Description
Technical Field
The utility model relates to a refrigeration technology field especially relates to water chilling unit.
Background
The water chilling unit is a common refrigeration mode in a refrigeration system, and particularly for the integral refrigeration of a plurality of buildings, an air-cooled water chilling unit is usually adopted mostly.
In the existing modularized air-cooled water chilling unit, at most 16 modules with the same refrigeration capacity or different refrigeration capacities can be designed according to different combinations and are mixed and matched, two main water pumps are generally adopted, one main water pump is used for standby, the other main water pump is used for alternate starting, and damage caused by long-term operation of a single water pump is avoided.
However, in an application scene such as a building, the start of the load is not always synchronous, and there may be a large fluctuation change of the load, and the water pump in the existing water chilling unit can operate at full load as long as there is a load, so that the low refrigeration utilization rate and the serious energy waste are easily caused when there is a bottom load, which is not favorable for energy saving and environmental protection.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of high energy consumption and low refrigeration utilization rate in the prior art, the utility model provides a water chilling unit.
The utility model adopts the technical scheme that the water chilling unit comprises an outdoor heat exchange assembly, an indoor heat exchange assembly and at least one variable frequency water pump, wherein the variable frequency water pump, the outdoor heat exchange assembly and the indoor heat exchange assembly are communicated through a pipeline, the outdoor heat exchange assembly comprises a plurality of heat exchange units which are connected in parallel, and an opening and closing device is arranged on a water inlet pipe and/or a water outlet pipe of each heat exchange unit; and a water pressure sensor in signal connection with the variable-frequency water pump is also arranged in the pipeline.
Preferably, the pipeline includes delivery pipe and wet return, and a plurality of the inlet tube of heat exchanger unit all communicates with the delivery pipe, and a plurality of the outlet pipe of heat exchanger unit all communicates with the wet return.
Preferably, the opening and closing means comprises a shut-off valve and/or a water solenoid valve.
Preferably, the two variable frequency water pumps are arranged in parallel, and the two variable frequency water pumps are communicated with the water supply pipe.
Preferably, the indoor heat exchange assembly comprises a plurality of fan coil devices connected in parallel, and two ends of each fan coil device are respectively communicated with the water supply pipe and the water return pipe.
Preferably, the opening and closing device is arranged between each fan coil device and the water supply pipe and the water return pipe.
Preferably, the opening and closing means comprises a shut-off valve and/or a water solenoid valve.
Preferably, the number of the fan coil devices is the same as the number of the heat exchange units.
Preferably, the heat exchanger unit is an air cooling unit.
Preferably, a pressure gauge is arranged on the heat exchanger unit.
Compared with the prior art, the utility model discloses because every heat exchanger unit all is provided with headstock gear to can be solitary cut off or communicate with the pipeline, can open the heat exchanger unit of corresponding quantity according to actual load's size, the water pressure in the pipeline also reaches corresponding pressure value this moment, converts this pressure value into the signal of telecommunication of control variable frequency water pump through water pressure sensor, thereby reaches the effect of adjusting variable frequency water pump frequency, energy consumption when reducing the low load.
Meanwhile, when the load is low, the running number of the heat exchange unit can be controlled, and the number of indoor heat exchange assemblies, namely fan coils, connected into a circulating system can be further controlled, so that the running times of equipment can be reduced, the abrasion is reduced, the service life is prolonged, the flow path of cooling liquid is reduced, the flowing resistance is reduced, the refrigeration heat exchange efficiency is improved, and the energy consumption is reduced.
Drawings
The invention is explained in more detail below with reference to exemplary embodiments and the accompanying drawings, in which:
fig. 1 is a schematic diagram of the system of the present embodiment.
1. A variable frequency water pump; 2. a heat exchanger unit; 3. a water inlet pipe; 4. a water outlet pipe; 5. a water supply pipe; 6. a water return pipe; 7. a stop valve; 8. a water solenoid valve; 9. a fan coil unit; 10. a pressure gauge; 11. a check valve; 12. and (3) a filter.
Detailed Description
A water chilling unit, in particular to an air-cooled cold and hot water unit, which is applied to the field of refrigeration and heat exchange and comprises an outdoor heat exchange assembly, an indoor heat exchange assembly and at least one variable frequency water pump 1, wherein the variable frequency water pump 1, the outdoor heat exchange assembly and the indoor heat exchange assembly are communicated through a pipeline, the outdoor heat exchange assembly comprises a plurality of heat exchange units 2 which are connected in parallel, and a water inlet pipe 3 and/or a water outlet pipe 4 of each heat exchange unit 2 are/is provided with an opening and closing device; and a water pressure sensor in signal connection with the variable-frequency water pump 1 is also arranged in the pipeline.
Wherein, the pipeline includes delivery pipe 5 and wet return 6, and is a plurality of heat exchanger unit 2's inlet tube 3 all communicates with delivery pipe 5, and is a plurality of heat exchanger unit 2's outlet pipe 4 all communicates with wet return 6. The variable frequency water pumps 1 are connected in parallel, and the two variable frequency water pumps 1 are communicated with the water supply pipe 5.
The indoor heat exchange assembly comprises a plurality of fan coil devices 9 connected in parallel, and two ends of each fan coil device 9 are respectively communicated with the water supply pipe 5 and the water return pipe 6. The opening and closing device is also arranged between each fan coil device 9 and the water supply pipe 5 and the water return pipe 6.
The opening and closing means comprise a shut-off valve 7 and/or a water solenoid valve 8.
The number of fan coil units 9 is the same as the number of heat exchanger units 2. The heat exchanger unit 2 is an air cooling unit, and a pressure gauge 10 is arranged on the heat exchanger unit 2.
In this embodiment, all establish ties in proper order between two frequency conversion water pumps 1 and the heat exchanger group 2 and have check valve 11 and water solenoid valve 8, it has filter 12 and water solenoid valve 8 still to establish ties in proper order between two frequency conversion water pumps 1 and the fan coil pipe subassembly simultaneously, the water solenoid valve 8 that is equipped with in proper order on the pipeline of one end promptly, filter 12, frequency conversion water pump 1, check valve 11 and water solenoid valve 8 constitute a frequency conversion water pump 1 group, two the same frequency conversion water pump 1 groups are parallel connection, simultaneously two 1 both ends of organizing of frequency conversion water pump respectively with outdoor heat exchange assemblies, indoor heat exchange assemblies is connected, thereby form a complete circulation circuit, and two frequency conversion water pumps 1 also can reach the effect of one with one and standby, prevent that single water pump from using the problem that produces fatigue loss easily for a long time.
The outdoor heat exchange assembly is composed of three heat exchange units 2 which are arranged in parallel, the heat exchange units 2 are air-cooled, can be common outdoor modular machines, can also be large-scale air-cooled water tower devices, and can select corresponding heat exchange forms and devices according to actual application. Each heat exchanger unit 2 is connected with a water inlet pipe 3 and a water outlet pipe 4, the water inlet pipe 3 is communicated with a water supply pipe 5, the water outlet pipe 4 is communicated with a water return pipe 6, and the effect that the single heat exchanger unit 2 is communicated into a pipeline is achieved.
In order to facilitate control, the pressure gauge 10, the water electromagnetic valve 8 and the stop valve 7 are arranged on the water inlet pipe 3 and the water outlet pipe 4, so that liquid in the water inlet pipe 3 or the water return pipe 6 can be prevented from entering the heat exchange unit 2 when the heat exchange unit 2 does not need to be started, and the effect of complete disconnection is achieved.
Of course, in another embodiment, it is preferable that each fan coil assembly is also provided with two lines for communicating with the water supply pipe 5 and the water return pipe 6, respectively, and that the two lines are also provided with a pressure gauge 10, a water solenoid valve 8 and a stop valve 7, so that each fan coil assembly can be individually connected to or disconnected from the pipeline.
Meanwhile, a communicating pipe for communicating the water supply pipe 5 and the water return pipe 6 is arranged between the water supply pipe 5 and the water return pipe 6, a stop valve 7 is further arranged on the communicating pipe, and the stop valve 7 is respectively arranged between the two ends of the communicating pipe and the outdoor heat exchange assembly on the water supply pipe 5 and the water return pipe 6.
Through the above setting, because every heat exchanger unit 2 all is provided with headstock gear to can be solitary cut off or communicate with the pipeline, can open corresponding quantity's heat exchanger unit 2 according to actual load's size, the water pressure in the pipeline also reaches corresponding pressure value this moment, converts this pressure value into the signal of telecommunication of control variable frequency water pump 1 through water pressure sensor, thereby reaches the effect of adjusting variable frequency water pump 1 frequency, energy consumption when reducing the low load. It should be pointed out that, pipeline water supply flow has undulant in the actual production, therefore water pressure sensor also can detect out different pressure values under same operating mode, and the frequency conversion water pump just needs to carry out timely regulation according to this change, just can guarantee that whole unit operation is comparatively coordinated.
Of course, in another embodiment, the control of the variable frequency water pump may also directly correspond to the number of the heat exchanger units to be turned on, and the effect of reducing energy consumption may also be achieved by presetting different numbers of the heat exchanger units to correspond to different operating frequencies of the water pump, but it is not possible to accurately adjust various fluctuations and deviations generated in the actual operation process.
Specifically, the whole water chilling unit is further provided with a control system, and under the manual control, the whole water chilling unit can normally operate through the control system, and manual intervention is less needed. When the system works, the controller samples the pressure of a pressure sensor of a pipe network, sampling data are fed back to the water pump frequency converter system to be converted into an electric signal B of 1-5 volts, and the rotating speed of the water pump is controlled according to the electric signal and the control logic of the rotating speed of the water pump. The electromagnetic valve is a water electromagnetic valve 8, and the water flow on the side of the water system is controlled to be switched off according to a switching signal sent by the system.
When a user side has a use demand, the load demand of the user side is detected to be P, the water electromagnetic valve 8, the variable frequency water pump 1 and the heat exchange unit 2 on the water supply pipe 5 side are opened simultaneously, the load of the single heat exchange unit 2 is N, the number of the heat exchange units 2 which are opened is equal to P/N, and the value is rounded upwards. At the moment, the water pressure sensor detects the pressure value A, converts the pressure value A into an electric signal B and feeds the electric signal B back to the control cabinet of the variable-frequency water pump 1, and the rotating speed of the variable-frequency water pump 1 in operation is adjusted according to the control logic. The control logics of the electric signal B and the water pump rotating speed S are as follows:
when B is more than or equal to B1, S = S1
When B1> B ≧ B2, S = S2
When B2> B ≧ B3, S = S3
When Bn-1> B ≧ Bn, S = Sn-1
When B < Bn, S = Sn.
Wherein, B1 is more than B2 is more than B3, namely Bn-1 is more than Bn; s1 > S2 > S3, i.e., Sn-1> Sn.
In the operation process, when the load demand P changes, the P/N is recalculated and the unit is started or closed, and the water pump operates according to the required rotating speed after the load demand changes.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The water chilling unit comprises an outdoor heat exchange assembly, an indoor heat exchange assembly and at least one variable frequency water pump, wherein the variable frequency water pump, the outdoor heat exchange assembly and the indoor heat exchange assembly are communicated through a pipeline; and a water pressure sensor in signal connection with the variable-frequency water pump is also arranged in the pipeline.
2. The water chilling unit according to claim 1, wherein the pipe includes a water supply pipe and a water return pipe, the water inlet pipes of the plurality of heat exchanger units are all communicated with the water supply pipe, and the water outlet pipes of the plurality of heat exchanger units are all communicated with the water return pipe.
3. The chiller according to claim 1 wherein the on/off device comprises a shut-off valve and/or a water solenoid valve.
4. The water chilling unit according to claim 2, wherein the variable frequency water pumps are two pumps connected in parallel, and both of the variable frequency water pumps are connected to the water supply pipe.
5. The chiller according to claim 2 wherein said indoor heat exchange assembly comprises a plurality of fan coil units connected in parallel, each of said fan coil units having opposite ends communicating with a water supply line and a water return line, respectively.
6. The chiller according to claim 5 wherein said opening and closing means is also provided between each of said fan coil means and the supply and return water lines.
7. The chiller according to claim 6 wherein the on/off means comprises a shut-off valve and/or a water solenoid valve.
8. The chiller according to claim 5 wherein the number of fan coil units is the same as the number of heat exchanger units.
9. The chiller according to claim 1 wherein said heat exchanger unit is an air cooler unit.
10. The chiller according to claim 9 wherein a pressure gauge is provided on said heat exchanger unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022947649.8U CN213873293U (en) | 2020-12-10 | 2020-12-10 | Water chilling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022947649.8U CN213873293U (en) | 2020-12-10 | 2020-12-10 | Water chilling unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213873293U true CN213873293U (en) | 2021-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022947649.8U Active CN213873293U (en) | 2020-12-10 | 2020-12-10 | Water chilling unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213873293U (en) |
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2020
- 2020-12-10 CN CN202022947649.8U patent/CN213873293U/en active Active
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