CN212936484U - Water chiller unit frequency converter cooling device and water chiller unit - Google Patents
Water chiller unit frequency converter cooling device and water chiller unit Download PDFInfo
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- CN212936484U CN212936484U CN202021571149.2U CN202021571149U CN212936484U CN 212936484 U CN212936484 U CN 212936484U CN 202021571149 U CN202021571149 U CN 202021571149U CN 212936484 U CN212936484 U CN 212936484U
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Abstract
The utility model discloses a water-cooling unit frequency converter cooling device and a water-cooling unit, which comprises a first circulation loop and a second circulation loop, wherein the first circulation loop and the second circulation loop are both arranged outside the water-cooling unit, and an intermediate heat exchanger is connected between the first circulation loop and the second circulation loop to carry out heat exchange of circulation media of the first circulation loop and the second circulation loop; the first circulation loop comprises a first circulation pump, a first water inlet pipe and a first water outlet pipe, the first water inlet pipe and the first water outlet pipe are respectively connected between a heat exchanger and an intermediate heat exchanger in a frequency converter of the water cooling unit, and the first circulation pump is installed on the first water inlet pipe; the second circulation loop comprises a second circulation pump, a second water inlet pipe, a second water outlet pipe and a cooling device, the second water inlet pipe and the second water outlet pipe are respectively connected between the second circulation pump and the cooling device, and the second circulation pump is arranged on the second water inlet pipe; the secondary heat exchange stably controls the temperature in the heat exchanger of the frequency converter, and prevents scaling blockage in the heat exchanger and shutdown of the frequency converter due to overhigh temperature.
Description
Technical Field
The utility model relates to a frequency conversion unit field, concretely relates to water chilling unit converter cooling device and water chilling unit.
Background
The heat dissipation mode of the frequency converter of the water-cooling unit is a water-cooled self-circulation cooling mode, and heat exchange cooling water used by the frequency converter is water inlet and return water of a condenser of the water-cooling unit which is directly adopted: the frequency converter is internally provided with a heat exchanger, the heat exchanger, an external cooling tower and a circulating pump form a closed loop, unit condensate water is cooled by the cooling tower, enters the heat exchanger under the driving of the circulating pump to exchange heat with the frequency converter to cool the frequency converter, and the condensate water after heat exchange flows back to the cooling tower to be cooled.
However, the current heat dissipation method has the following problems:
1. outdoor temperature difference can direct influence the temperature variation of cooling water in the four seasons, and outdoor temperature is higher the temperature of corresponding cooling water also can be higher, for example: the outdoor temperature of the festival can reach about 40 ℃ in high temperature in summer, so too high cooling water often leads to the frequency converter to stop because of the high temperature warning.
2. The converter heat exchanger is integral type welding corrosion resistant plate formula heat exchanger, because the hardness of water quality is great in the part area, consequently, after the converter heat exchanger cools down the converter, the cooling water heat absorption temperature in the converter heat exchanger is higher, cause the cooling water often to block up the converter heat exchanger because of the scale deposit, influence heat transfer discharge and effect, need regularly medicine to wash the heat exchanger every year, lead to annual high temperature season converter to be in the shutdown state basically, this mode seriously influences and has limited unit seasonal turn-on rate and operating efficiency, medicine is washed the heat exchanger every year and is caused very big damage to it again, except reducing life.
Disclosure of Invention
The utility model discloses the purpose is: provided are a frequency converter cooling device of a water chiller and the water chiller.
The technical scheme of the utility model is that: in a first aspect, a cooling device for a frequency converter of a water-cooling unit is provided, which comprises a first circulation loop and a second circulation loop, wherein the first circulation loop and the second circulation loop are both arranged outside the water-cooling unit, and an intermediate heat exchanger is connected between the first circulation loop and the second circulation loop for heat exchange between the first circulation loop and the second circulation loop;
the first circulation loop comprises a first circulation pump, a first water inlet pipe and a first water outlet pipe, the first water inlet pipe and the first water outlet pipe are respectively connected between a heat exchanger in a frequency converter of the water cooling unit and the intermediate heat exchanger, and the first circulation pump is installed on the first water inlet pipe;
the second circulation loop comprises a second circulation pump, a second water inlet pipe, a second water outlet pipe and a cooling device, the second water inlet pipe and the second water outlet pipe are respectively connected between the second circulation pump and the cooling device, and the second circulation pump is installed on the second water inlet pipe.
Furthermore, the device also comprises a control device, and the control device is respectively connected with the first circulating pump and the second circulating pump.
Furthermore, all be provided with the first temperature sensor who is used for monitoring its inside temperature in first inlet tube and the first outlet pipe, first temperature sensor all with controlling means is connected.
Furthermore, all be provided with the second temperature sensor who is used for monitoring its inside temperature in second inlet tube and the second outlet pipe, second temperature sensor all with controlling means is connected.
Further, the control device comprises an electric cabinet, and the electric cabinet is installed above the intermediate heat exchanger.
Further, the cooling device comprises an evaporator.
Further, the evaporator is communicated with the water chiller unit to introduce a circulating medium from the water chiller unit.
Further, the intermediate heat exchanger comprises a plate heat exchanger.
Further, the circulating medium in the first circulation loop is soft water.
In a second aspect, a water chiller unit is provided, which comprises the frequency converter cooling device of the water chiller unit according to any one of the first aspect.
Compared with the prior art, the utility model has the advantages that: by adopting a secondary heat exchange mode, after the first circulation loop cools the heat exchanger in the frequency converter of the water-cooling unit, the first circulation loop exchanges heat with the second circulation loop in the intermediate heat exchanger, and is cooled by the second circulation loop, so that the water in the heat exchanger in the frequency converter is effectively prevented from being heated, the blockage caused by scaling in the frequency converter heat exchanger is avoided, and the shutdown caused by overhigh temperature of the frequency converter due to failure in cooling is further avoided.
Drawings
In order to make the objects, technical solutions and advantages of the present invention clearer, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 is a structural diagram of a cooling device of a frequency converter of a water chiller provided in an embodiment of the present invention;
wherein: 1. a first circulation pump; 2a, a first water inlet pipe; 2b, a first water outlet pipe; 3. a plate heat exchanger; 4a, a second water inlet pipe; 4b, a second water outlet pipe; 5. a second circulation pump; 6. an evaporator; 7. a heat exchanger in the frequency converter of the water cooling unit; 8. an electric cabinet; 9. a water chiller unit.
Detailed Description
The application aims at providing a water chiller frequency converter cooling device, plays good cooling effect to the water chiller frequency converter, and the stable control frequency converter temperature to solve heat exchanger scale deposit in the converter, block up the problem, thereby guarantee frequency converter unit high efficiency operation, the totality reduces refrigerating system's running cost.
The water cooling unit is a device for cooling large-scale factory buildings and production equipment, and consists of an evaporator, a condenser, a compressor, a pump, a fan and a cooling tower, wherein refrigerant is compressed into liquid by the compressor and then is sent into the evaporator to exchange heat with chilled water so as to refrigerate the chilled water, the chilled water is sent into a cooling coil at each fan air port by the freezing pump, and the fan blows the chilled water to achieve the purpose of cooling. The evaporated refrigerant releases heat in the condenser to be in a gaseous state, the pump sends cooling water to the cooling tower, and the cooling water is sprayed and cooled by a water tower fan in the cooling tower and exchanges heat with the atmosphere to dissipate the heat to the atmosphere. And in order to ensure that the water cooling unit operates under the optimal working condition, a frequency converter is also arranged in the water cooling unit to control the rotating speed and the internal volume ratio of the compressor and the liquid supply amount of the evaporator to be always matched.
The frequency converter can generate heat after long-time operation, and can automatically stop when the temperature is too high. Therefore, the frequency converter needs to be cooled for ensuring the stable operation of the frequency converter. The frequency converter is internally provided with a heat exchanger, heat exchange cooling water is directly used for water inlet and return of a condenser of the water cooling unit, the influence of outdoor temperature is large, when the outdoor temperature is high, the cooling effect of the heat exchanger in the frequency converter is poor, and scaling blockage in the heat exchanger and shutdown of the frequency converter due to overhigh temperature are easily caused.
Example 1: the embodiment provides a cooling device for a frequency converter of a water-cooling unit, which is shown in fig. 1 and comprises a first circulation loop and a second circulation loop, wherein the first circulation loop and the second circulation loop are both arranged on the outer side of the water-cooling unit, and an intermediate heat exchanger is connected between the first circulation loop and the second circulation loop to perform heat exchange between the first circulation loop and the second circulation loop;
the first circulation loop comprises a first circulation pump 1, a first water inlet pipe 2a and a first water outlet pipe 2b, the first water inlet pipe 2a and the first water outlet pipe 2b are respectively connected between a heat exchanger 7 and an intermediate heat exchanger in a frequency converter of the water cooling unit, and the first circulation pump 1 is installed on the first water inlet pipe 2 a; the circulating medium in the first circulating loop is driven by the first circulating pump 1 to enter a water inlet of the first circulating pump 1 through the first water inlet pipe 2a in the heat exchanger 7 in the water-cooling unit frequency converter, then flows out of a water outlet of the first circulating pump 1 to enter the intermediate heat exchanger through the first water inlet pipe 2a to exchange heat with the circulating medium in the second circulating loop, and flows back to the heat exchanger 7 in the water-cooling unit frequency converter after heat exchange and temperature reduction to cool the frequency converter.
The second circulation loop comprises a second circulation pump 5, a second water inlet pipe 4a, a second water outlet pipe 4b and a cooling device, the second water inlet pipe 4a and the second water outlet pipe 4b are respectively connected between the second circulation pump 5 and the cooling device, and the second circulation pump 5 is installed on the second water inlet pipe 4 a. Preferably, in the present embodiment, the temperature reducing device includes an evaporator 6.
The circulating medium in the second circulating loop enters the intermediate heat exchanger from the evaporator 6 through the second water inlet pipe 4a under the driving of the second circulating pump 5 to perform heat exchange with the circulating medium in the first circulating loop to cool the circulating medium, and flows back to the evaporator 6 to cool the circulating medium after the heat exchange is performed to heat the circulating medium.
Preferably, in this embodiment, the cooling device further includes a control device, and the control device is connected to the first circulation pump 1 and the second circulation pump 5 respectively. The control device controls the temperature of the circulating medium in the first circulating loop by controlling the frequencies of the first circulating pump 1 and the second circulating pump 5 to control the flow rates of the circulating medium in the first circulating loop and the second circulating loop.
First temperature sensors (not shown in the figure) for monitoring the internal temperature of the first water inlet pipe 2a and the first water outlet pipe 2b are arranged in the first water inlet pipe and the first water outlet pipe respectively, and the first temperature sensors are connected with a control device. Second temperature sensors (not shown in the figure) for monitoring the internal temperature of the second water inlet pipe 4a and the second water outlet pipe 4b are arranged in the first water inlet pipe and the second water outlet pipe respectively, and the second temperature sensors are connected with a control device.
When the temperature monitored by the first temperature sensor in the first water inlet pipe 2a is higher than a preset threshold value, the control device controls the frequency of the second circulating pump 5 to be increased so as to accelerate the circulating frequency of the second circulating loop, and therefore the cooling efficiency of the second circulating loop on the first circulating loop is improved; or the frequency of the first circulating pump 1 and the frequency of the second circulating pump 5 are controlled to increase so as to increase the circulating frequency of the circulating medium in the first circulating loop and the second circulating loop, so as to increase the heat exchange efficiency between the first circulating loop and the heat exchanger 7 in the frequency converter of the water cooling unit and between the first circulating loop and the second circulating loop, thereby reducing the temperature of the circulating medium in the first water outlet pipe 2b and preventing the first circulating loop from being incapable of rapidly reducing the temperature of the heat exchanger 7 in the frequency converter.
When the temperature monitored by the first temperature sensor in the first water outlet pipe 2b is lower than a preset threshold value, the control device controls the frequency of the second circulating pump 5 to be reduced; or the frequencies of the first circulating pump 1 and the second circulating pump 5 are controlled to be reduced simultaneously, so that the heat exchange efficiency between the second circulating loop and the first circulating loop is reduced, and the phenomenon that the first circulating loop excessively cools a heat exchanger 7 in a frequency converter of the water-cooling unit to cause dewing inside the frequency converter and serious electrical safety accidents is prevented.
Second temperature sensors for monitoring the internal temperatures of the second water inlet pipe 4a and the second water outlet pipe 4b are provided therein so as to determine the temperature difference between the first circulation loop and the second circulation loop, thereby more precisely adjusting the circulation frequencies of the first circulation loop and the second circulation loop.
Preferably, in this embodiment, the control device includes an electric cabinet 8, and the electric cabinet 8 is installed above the intermediate heat exchanger to reduce an occupied area.
The evaporator 6 of the cooling device is communicated with the water cooling unit to introduce a circulating medium from the water cooling unit, and particularly, the evaporator 6 is communicated with the evaporator in the water cooling unit to introduce chilled water as the circulating medium in the second circulating loop, so that a water source device is not required to be added, and the space is saved.
Specifically, in this embodiment, the intermediate heat exchanger is preferably a plate heat exchanger 3, a series of stacked metal sheets with a certain corrugated shape are arranged inside the intermediate heat exchanger to form a flow channel, and the flow of the circulating medium in the first circulating loop and the second circulating loop in the plate heat exchanger 3 is parallel to the metal sheets, so that no bypass flow exists, the heat exchange efficiency is high, the heat loss is small, the structure is compact and light, and the occupied area is small. Specifically, a first circulating pump 1 is communicated with a primary side water inlet of a plate heat exchanger 3 through a first water inlet pipe 2a, and a primary side water outlet of the plate heat exchanger 3 is connected with a heat exchanger 7 in the frequency converter through a first water outlet pipe 2 b. The second circulating pump 5 is communicated with a secondary side water inlet of the plate type heat exchanger 3 through a second water inlet pipe 4a, and a secondary side water outlet of the plate type heat exchanger 3 is communicated with the evaporator 6 through a second water outlet pipe 4 b. And a flow channel between the primary side water inlet and the primary side water outlet and a flow channel between the secondary side water inlet and the secondary side water outlet are not communicated.
The circulating medium in the first circulating loop is soft water, so that the circulating medium is further prevented from forming scale after absorbing heat, and blocking a heat exchanger 7 in a water-cooling unit frequency converter connected with the first water inlet pipe 2a and the first water outlet pipe 2 b.
Example 2: the embodiment provides a water chiller unit, which comprises the frequency converter cooling device provided in embodiment 1.
In the description of the present invention, it is to be understood that the terms "above", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The above-mentioned embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which should not be construed as limiting the scope of the present invention. All modifications made according to the spirit of the main technical scheme of the present invention shall be covered within the protection scope of the present invention.
Claims (10)
1. The cooling device for the frequency converter of the water chilling unit is characterized by comprising a first circulation loop and a second circulation loop, wherein the first circulation loop and the second circulation loop are arranged on the outer side of the water chilling unit, and an intermediate heat exchanger is connected between the first circulation loop and the second circulation loop to exchange heat of circulating media in the first circulation loop and the second circulation loop;
the first circulation loop comprises a first circulation pump, a first water inlet pipe and a first water outlet pipe, the first water inlet pipe and the first water outlet pipe are respectively connected between a heat exchanger in a frequency converter of the water cooling unit and the intermediate heat exchanger, and the first circulation pump is installed on the first water inlet pipe;
the second circulation loop comprises a second circulation pump, a second water inlet pipe, a second water outlet pipe and a cooling device, the second water inlet pipe and the second water outlet pipe are respectively connected between the second circulation pump and the cooling device, and the second circulation pump is installed on the second water inlet pipe.
2. The cooling device for the frequency converter of the water chilling unit according to claim 1, further comprising a control device, wherein the control device is connected to the first circulating pump and the second circulating pump respectively.
3. The cooling device for the frequency converter of the water chilling unit according to claim 2, wherein the first water inlet pipe and the first water outlet pipe are respectively provided with a first temperature sensor for monitoring the internal temperature thereof, and the first temperature sensors are respectively connected with the control device.
4. The cooling device for the frequency converter of the water chilling unit according to claim 2, wherein the second water inlet pipe and the second water outlet pipe are both provided with a second temperature sensor for monitoring the internal temperature thereof, and the second temperature sensors are both connected with the control device.
5. The chiller frequency converter cooling device according to any one of claims 2-4, wherein the control device comprises an electric cabinet, and the electric cabinet is installed above the intermediate heat exchanger.
6. The chiller unit frequency converter cooling device of claim 1, wherein the temperature reduction device comprises an evaporator.
7. The chiller frequency converter cooling apparatus of claim 6, wherein said evaporator is in communication with a chiller for introducing a circulating medium from the chiller.
8. The chiller unit frequency converter cooling arrangement of claim 1, wherein the intermediate heat exchanger comprises a plate heat exchanger.
9. The chiller frequency converter cooling device of claim 1, wherein the circulating medium in the first circulation loop is soft water.
10. A water chiller plant characterized by comprising the water chiller plant frequency converter cooling apparatus according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021571149.2U CN212936484U (en) | 2020-07-31 | 2020-07-31 | Water chiller unit frequency converter cooling device and water chiller unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021571149.2U CN212936484U (en) | 2020-07-31 | 2020-07-31 | Water chiller unit frequency converter cooling device and water chiller unit |
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| Publication Number | Publication Date |
|---|---|
| CN212936484U true CN212936484U (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021571149.2U Active CN212936484U (en) | 2020-07-31 | 2020-07-31 | Water chiller unit frequency converter cooling device and water chiller unit |
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| Country | Link |
|---|---|
| CN (1) | CN212936484U (en) |
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2020
- 2020-07-31 CN CN202021571149.2U patent/CN212936484U/en active Active
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