CN110553423A - Cooling structure of water chilling unit and water chilling unit - Google Patents
Cooling structure of water chilling unit and water chilling unit Download PDFInfo
- Publication number
- CN110553423A CN110553423A CN201910875123.2A CN201910875123A CN110553423A CN 110553423 A CN110553423 A CN 110553423A CN 201910875123 A CN201910875123 A CN 201910875123A CN 110553423 A CN110553423 A CN 110553423A
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- CN
- China
- Prior art keywords
- water
- cooling
- pipeline
- frequency converter
- evaporator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 160
- 238000001816 cooling Methods 0.000 title claims abstract description 93
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 230000000694 effects Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 22
- 230000001276 controlling effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000010687 lubricating oil Substances 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/006—Cooling of compressor or motor
- F25B31/008—Cooling of compressor or motor by injecting a liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses a cooling structure of a water cooling unit and the water cooling unit, comprising: and the water cooling pipeline is communicated with a chilled water circulation pipeline for heat exchange with the evaporator, and chilled water passing through the water cooling pipeline cools a component to be cooled of the water cooling unit. The cooling structure has the advantages that the chilled water circulation pipeline communicated with the water cooling pipeline and exchanging heat with the evaporator cools the component to be cooled, the effect is obvious, the temperature of the component to be cooled can be effectively reduced, and the waterway system is closed and cannot be influenced by the external environment, so that the chilled water quality of the chilled water circulation pipeline of the evaporator is better, the water dirt coefficient is lower, and the service life of the cooling structure is greatly prolonged.
Description
Technical Field
the invention relates to the field of air conditioners, in particular to a cooling structure of a water cooling unit and the water cooling unit.
Background
in large water-cooled cold water plants, frequency converters are almost one of the necessary components. In the whole water-cooling water equipment system, the frequency converter plays a role in converting alternating current and direct current, and for a frequency converter unit, the frequency and the power input to the motor are changed through the frequency converter, so that the aim of controlling the rotating speed and the torque of the alternating current motor is fulfilled.
For the refrigeration equipment directly driven by the motor, the reliability of the frequency converter directly influences the reliability of the unit, wherein the most common but non-negligible problem is the heating problem of the frequency converter. In the working process of the frequency converter, more than 80% of copper loss and iron loss generated by the current of the main circuit are released by heating, and the power device of the frequency converter can also generate heat due to switching loss and low-pass loss generated by high-frequency switch switching, conduction voltage drop and the like. If the heat is not discharged out of the frequency converter in time, the frequency converter is shut down due to high-temperature protection; if the frequency converter is cooled excessively, the frequency converter is condensed, the problems of corrosion of metal equipment and short circuit between devices are caused, even electric leakage or electric shock accidents are caused, and the safety and the reliability of electrical equipment are seriously influenced, so that the heat dissipation and the cooling design of the frequency converter determine whether the frequency converter can work stably and reliably for a long time.
The cooling scheme of the frequency converter commonly used in the current large-scale water-cooling water cooling equipment mainly comprises the following steps: 1. cooling of a reactance of the frequency converter: changing the air flow rate of an internal reactance part of the frequency converter by adopting an external fan, and discharging hot air out of the frequency converter to take away the heat of the reactance part of the frequency converter; 2. cooling the frequency converter module: refrigerant is introduced into a built-in cold plate and a small evaporator of the frequency converter module to be evaporated, so that the purpose of taking away the heat of the module is achieved. For the cooling scheme of the frequency converter module, because the refrigerant belongs to phase change heat transfer in the built-in refrigerant flow channel and the small evaporator, the heat transfer amount is large and is not easy to control, and the phenomenon of condensation of the frequency converter is caused due to the fact that the heat transfer area is uneven (the temperature of part of the area is particularly low and the temperature of part of the area is high) often.
Disclosure of Invention
The invention provides a cooling structure of a water cooling unit and the water cooling unit, aiming at solving the technical problem that a frequency converter of the water cooling unit in the prior art is poor in cooling effect.
The technical scheme adopted by the invention is as follows:
The invention provides a cooling structure of a water cooling unit, which comprises: and the water cooling pipeline is communicated with a chilled water circulation pipeline for heat exchange with the evaporator, and chilled water passing through the water cooling pipeline cools a component to be cooled of the water cooling unit.
The component to be cooled comprises: frequency converter with built-in waterway flow passage.
Furthermore, the component to be cooled also comprises an oil tank with a built-in water channel.
Furthermore, a regulating valve and/or a water pump are arranged on the water cooling pipeline
Preferably, both ends of the water cooling pipeline are simultaneously connected to a chilled water circulating pipeline positioned on the water outlet side or the water inlet side of the evaporator.
In another embodiment, one end of the water cooling pipeline is connected to the chilled water circulation pipeline positioned on the water outlet side of the evaporator, and the other end of the water cooling pipeline is connected to the chilled water circulation pipeline positioned on the water inlet side of the evaporator.
Preferably, the frequency converter and a connecting pipeline of the oil tank and the water cooling pipeline are respectively provided with a water pump.
Preferably, a regulating valve is arranged on a connecting pipeline of the frequency converter and/or the oil tank and the water cooling pipeline.
Furthermore, the frequency converter and the connecting pipeline of the oil tank are connected in parallel or in series.
The invention also provides a water cooling unit using the cooling structure.
Compared with the prior art, the refrigeration water circulation pipeline communicated with the evaporator for heat exchange is used for cooling, the effect is obvious, the temperature of the component to be cooled can be effectively reduced, and the waterway system is closed and cannot be influenced by the external environment, so that the refrigeration water quality of the refrigeration water circulation pipeline of the evaporator is better, the water fouling coefficient is lower, and the service life of the cooling structure is greatly prolonged.
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 of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another 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 and 2, the present invention provides a cooling structure of a water cooling unit, which mainly includes a water cooling pipeline 2, wherein the water cooling unit mainly includes an evaporator 3, the evaporator 3 supplies cold to a user through a closed chilled water circulation pipeline 1, the water cooling pipeline 2 is communicated with the chilled water circulation pipeline 1, so that chilled water in the chilled water circulation pipeline 1 can flow through the water cooling pipeline 2 to provide cold, and the water cooling pipeline 2 performs heat exchange and cooling through a component to be cooled of the water cooling unit, in a specific application, chilled water leaving water for heat exchange of the evaporator has a low temperature, a significant cooling effect, and a temperature of the component to be cooled can be effectively reduced.
In the invention, the component to be cooled comprises a frequency converter 21 with a built-in water channel and an oil tank 22 with a built-in water channel, wherein, as shown in fig. 1, the component to be cooled can only have the frequency converter 21, and the water cooling pipeline 2 is provided with a regulating valve for regulating the flow.
As shown in fig. 2, in a specific embodiment, the connection pipeline of the frequency converter 21 and the oil tank 22 is connected in parallel to communicate with the water cooling pipeline 2, the inlet end of the water cooling pipeline 2 is connected to the chilled water circulation pipeline 1 at the water inlet side of the evaporator 3, the outlet end of the water cooling pipeline 2 is connected to the chilled water circulation pipeline 1 at the water outlet side of the evaporator 3, because the pressure drop of the built-in water channel flow channels of the frequency converter 21 and the oil tank 22 is smaller than the pressure drop of the chilled water circulation pipeline 1 at the water outlet side of the evaporator 3, i.e. the pressure is higher, the chilled water after cooling the oil tank 22 and the frequency converter 21 and the chilled water at the water outlet side of the evaporator 3 are merged and then supplied to a user to form a closed water circulation without additional water pump to provide pressure, meanwhile, the connection pipelines of the frequency converter 21 and the oil tank 22 and the water cooling pipeline 2 can, the cooling control adopts real-time temperature feedback of the frequency converter module, and the independent regulating valve is used for controlling the water flow passing through the frequency converter module, so as to control the temperature of the frequency converter module to be kept within the normal working environment temperature. And according to the real-time temperature feedback of the oil tank, the independent regulating valve is used for controlling the water flow flowing through the built-in flow channel of the oil tank, so that the temperature of the lubricating oil is controlled.
because the water pressure drop setting ranges of large water-cooling water cooling equipment are different, when the waterway system is arranged in the following mode, and the waterway channels of the frequency converter 21 and the oil tank 22 are arranged in parallel, the corresponding regulating valve needs to be replaced by the water pump 24 for providing extra pressure and controlling the water flow passing through the frequency converter 21 and the oil tank 22.
First, as shown in fig. 4, when the water pressure drop of the chilled water circulation pipeline 1 in the water path system is smaller than the water pressure drop of the water path flow channels of the frequency converter 21 and the oil tank 22, the regulating valves on the water path flow channels of the frequency converter 21 and the oil tank 22 are replaced by the water pump 24, the inlet end of the water cooling pipeline 2 is connected to the chilled water circulation pipeline 1 on the water outlet side of the evaporator 3, the outlet end of the water cooling pipeline 2 is connected to the chilled water circulation pipeline 1 on the water inlet side of the evaporator 3, the chilled water flowing out of the chilled water circulation pipeline 1 on the water outlet side of the evaporator 3 flows to the water cooling pipeline 2, and is merged with the chilled water in the chilled water circulation pipeline 1 on the water inlet side of the evaporator 3 to exchange heat.
Secondly, as shown in fig. 3 and 5, when the inlet end and the outlet end of the water cooling pipeline are connected to the chilled water circulation pipeline on the water outlet side of the evaporator or on the water inlet side at the same time, the regulating valves on the cold frequency converter and the oil tank water channel need to be replaced by a water pump to provide the chilled water circulation power of the water cooling pipeline. And thirdly, when at least one path of water pressure drop in the water inlet waterway of the waterway passage of the frequency converter or the waterway passage of the cold oil tank is larger than the water return waterway after the frequency converter and the oil tank are cooled, the regulating valve of the waterway with the large water pressure drop is replaced by the water pump. Meanwhile, a water pump can be directly arranged on the water-cooling pipeline, the maximum value of the water pump is selected according to the cooling requirements of the oil tank and the frequency converter, the flow corresponding to the water pump is converted out, a regulating valve is additionally arranged on a branch with small cooling requirements so as to reduce the water flow flowing through the branch, and the purposes of reducing the cost and independently controlling the cooling of lubricating oil and the frequency converter are achieved.
In another embodiment, the frequency converter and the water channel of the oil tank are arranged in series, and the chilled water firstly flows through the built-in water channel of the oil tank to take away heat in the lubricating oil and then flows through the built-in water channel of the frequency converter to cool the frequency converter. The advantage of cooling down the oil tank earlier afterwards cooling down the converter lies in: after the lubricating oil is cooled, the temperature of the part of the freezing water rises, so that the abnormality of frequency converter condensation caused by too low temperature during the cooling of the frequency converter can be effectively avoided. Compared with the parallel water flow path, the series water flow path only needs one control water pump or regulating valve and one control program, and the cost can be effectively reduced.
The invention also provides a water cooling unit, which comprises: compressor 8, condenser 4, flash tank 5, one-level expansion valve 6, second grade expansion valve 7, evaporimeter 3 and refrigerated water circulation pipeline 1, refrigerated water circulation pipeline 1 passes through the output refrigerated water of the 3 heat transfer cooling of evaporimeter, and refrigerated water circulation pipeline 1 carries out the cooling and is equipped with second water pump 9 through the user side simultaneously, and this water-cooled unit uses above-mentioned cooling structure.
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 (10)
1. A cooling structure of a water chiller unit, comprising: and the water cooling pipeline is communicated with a chilled water circulation pipeline for heat exchange with the evaporator, and chilled water passing through the water cooling pipeline cools a component to be cooled of the water cooling unit.
2. The cooling structure of a water chiller according to claim 1, wherein the component to be cooled comprises: and a frequency converter.
3. The cooling structure of a water chiller according to claim 2 wherein the component to be cooled further comprises an oil tank.
4. The cooling structure of a water chilling unit according to claim 1, wherein the water cooling pipeline is provided with a regulating valve and/or a water pump.
5. The cooling structure of the water chiller according to claim 1, wherein both ends of the water cooling pipeline are connected to the chilled water circulation pipeline on the water outlet side of the evaporator or connected to the chilled water circulation pipeline on the water inlet side of the evaporator.
6. The cooling structure of the water chiller according to claim 1, wherein one end of the water cooling pipeline is connected to the chilled water circulation pipeline on the water outlet side of the evaporator, and the other end of the water cooling pipeline is connected to the chilled water circulation pipeline on the water inlet side of the evaporator.
7. The cooling structure of the water chiller according to claim 3, wherein a water pump is provided on a connection pipe between the inverter and the oil tank and the water cooling pipeline.
8. The cooling structure of the water chilling unit according to claim 3, wherein a regulating valve is provided on a connection pipe between the frequency converter and/or the oil tank and the water cooling pipeline.
9. The cooling structure of a water chiller according to claim 3, wherein the connection pipeline between the frequency converter and the oil tank is connected in parallel or in series.
10. A water chiller plant characterized by using the cooling structure as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910875123.2A CN110553423A (en) | 2019-09-17 | 2019-09-17 | Cooling structure of water chilling unit and water chilling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910875123.2A CN110553423A (en) | 2019-09-17 | 2019-09-17 | Cooling structure of water chilling unit and water chilling unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110553423A true CN110553423A (en) | 2019-12-10 |
Family
ID=68740463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910875123.2A Pending CN110553423A (en) | 2019-09-17 | 2019-09-17 | Cooling structure of water chilling unit and water chilling unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110553423A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4720981A (en) * | 1986-12-23 | 1988-01-26 | American Standard Inc. | Cooling of air conditioning control electronics |
| CN103312125A (en) * | 2012-03-07 | 2013-09-18 | 珠海格力电器股份有限公司 | Air conditioner, and cooling system and cooling method for centrifugal unit frequency converter in air conditioner |
| CN106546045A (en) * | 2016-11-21 | 2017-03-29 | 珠海格力电器股份有限公司 | Frequency converter cooling device, air conditioning unit and control method |
| CN108302835A (en) * | 2018-01-18 | 2018-07-20 | 重庆美的通用制冷设备有限公司 | Handpiece Water Chilling Units and its control method |
-
2019
- 2019-09-17 CN CN201910875123.2A patent/CN110553423A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4720981A (en) * | 1986-12-23 | 1988-01-26 | American Standard Inc. | Cooling of air conditioning control electronics |
| CN103312125A (en) * | 2012-03-07 | 2013-09-18 | 珠海格力电器股份有限公司 | Air conditioner, and cooling system and cooling method for centrifugal unit frequency converter in air conditioner |
| CN106546045A (en) * | 2016-11-21 | 2017-03-29 | 珠海格力电器股份有限公司 | Frequency converter cooling device, air conditioning unit and control method |
| CN108302835A (en) * | 2018-01-18 | 2018-07-20 | 重庆美的通用制冷设备有限公司 | Handpiece Water Chilling Units and its control method |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191210 |
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| RJ01 | Rejection of invention patent application after publication |