CN111935947A

CN111935947A - Energy-concerving and environment-protective type cooling rack

Info

Publication number: CN111935947A
Application number: CN202010518918.0A
Authority: CN
Inventors: 茅雷; 潘岑诚; 邵建新; 邢松尧; 陆婷婷; 盛晓峰; 汪东旭; 王贝; 戴劲峰; 张小萍
Original assignee: Nantong Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
Current assignee: Nantong Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2020-11-13

Abstract

The application discloses an energy-saving environment-friendly cooling cabinet, which comprises a closed shell, a first partition plate and a second partition plate, wherein the first partition plate and the second partition plate are arranged in the shell, the shell is divided into a first cavity, a second cavity and a third cavity by the first partition plate and the second partition plate from top to bottom, a phase cooling medium is placed in the first cavity, the second cavity is an electrical element cavity, at least one cold plate is arranged in the second cavity, the phase cooling plate is hollow, and the phase cooling medium is placed in the phase cooling plate; the third cavity is a heat sink cavity. The energy-saving and environment-friendly cooling cabinet has the beneficial effects of low energy consumption, isothermal property, source collection separation and the like.

Description

Energy-concerving and environment-protective type cooling rack

Technical Field

The application relates to the technical field of electrical cabinets, in particular to an energy-saving and environment-friendly cooling cabinet.

Background

With the progress of science and technology, the applications of power electronic devices and components are more and more extensive, and the development is going to the direction of more and more perfect functions and smaller volumes. High-density heat flow is often generated inside the power electronic equipment device, and particularly for some cabinets (such as a control cabinet of a power system and a control cabinet of a communication transmission base station) which are placed outdoors for long-term operation, the high temperature causes the problems of panel screen-splash, device crash, element aging, unstable operation and the like of elements in the cabinets, and great threats are caused to the reliability of the device. In order to improve the reliability of power electronic equipment and the adaptability to various severe environmental conditions, research on related cooling technologies is generally regarded and developed.

The common temperature control technology of the power electronic equipment at the present stage mainly uses an added heat insulation material and a heat insulation layer; the fan is used for directly air-cooling and cabinet air-conditioning. The use of heat insulation materials has high cost and poor heat insulation effect; direct air cooling often cannot meet the requirements of outdoor operation cabinet on water resistance, dust resistance and corrosion resistance; the cabinet air conditioner has good cooling capacity, but has large energy consumption and high cost, and the air conditioner has frequent failure after long-time operation under the high-temperature severe environment, and the operation and maintenance work task is heavy.

Disclosure of Invention

The invention aims to provide an energy-saving and environment-friendly cooling cabinet to overcome the defects in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: an energy-saving environment-friendly cooling cabinet comprises a closed shell, a first partition plate and a second partition plate, wherein the first partition plate and the second partition plate are arranged in the shell, the shell is divided into a first cavity, a second cavity and a third cavity by the first partition plate and the second partition plate from top to bottom, a phase cooling medium is placed in the first cavity, the second cavity is an electrical element cavity, at least one cold plate is arranged in the second cavity, the interior of the cold plate is hollow, and the phase cooling medium is placed in the cold plate; the third cavity is a heat sink cavity.

Preferably, a water coil cold pipe is further arranged in the first cavity and is distributed in an S-shaped staggered manner, and a water inlet pipe and a water outlet pipe of the water coil cold pipe extend outwards to be connected with a circulating water pump.

Preferably, the lower side of the first partition board and the upper side of the second partition board are provided with a cold plate clamping groove, and the cold plate is fixedly arranged between the first partition board and the second partition board through the cold plate clamping groove and the locking strip.

Preferably, the shell top plate is provided with a phase change working substance layer.

Preferably, the second partition plate extends downwards to the inside of the third cavity and is provided with a heat dissipation fin, and the rear side of the heat dissipation fin is provided with a fan.

Preferably, the surface of the shell of the third cavity is provided with heat dissipation holes.

Preferably, the phase change working medium is R134A.

The application discloses an energy-concerving and environment-protective type cooling rack has following beneficial effect:

1. the energy consumption is low; the cabinet only needs one water pump with power not exceeding 100W, and circulating circulation of cooling water is realized.

2. The high efficiency of heat transfer; the phase change heat transfer is mainly realized by the phase change heat transfer of vapor and liquid phases of working liquid, and the heat resistance is very low, so that the heat conduction capability is very high. Compared with metals such as silver, copper, aluminum, etc., the phase change per unit weight can transfer several orders of magnitude more heat. The temperature of the cabinet can be controlled to be not higher than 5 ℃ of the cooling water.

3. Excellent isothermal property; when the electronic component works, the heat productivity is only limited to a certain point or a plurality of points, and local heat accumulation can occur in the cold plate due to the problem of metal heat transfer efficiency in a long-term working state, so that the local temperature is overhigh, and the service life is shortened. The phase-change heat transfer steam is in a saturated state, the pressure of the saturated steam is determined by the saturation temperature, and when the phase-change heat transfer steam works, the interior of the phase-change cavity is approximately in a pressure stable state, so that the temperature equalizing characteristic of the phase-change plate and the phase-change cabinet is determined.

4. The fixed temperature starts to transfer heat; in the traditional liquid cooling equipment, the surface of a cooling pipe can generate condensation phenomenon. The phase change heat transfer can utilize the adjustment of the vacuum degree of a medium, heat transfer is started at a certain fixed temperature, namely, the phase change medium does not work at a temperature lower than a specified temperature, and the phase change medium starts to work once reaching the specified temperature. By utilizing the characteristic, the working temperature of the phase change medium in the phase-cooling cabinet can be controlled, the phase change medium stops evaporating when the working temperature is lower than a certain temperature, the temperature of a phase change layer is controlled, and the generation of condensation can be avoided by combining the temperature equalization characteristic.

5. Separating a sink source; the source-sink separation means that a heat source and a heat sink (cold source) are separated into two places to perform heat exchange. The traditional cooling equipment is characterized in that a cold source and a heat source are attached to each other through a thin wall to transfer heat, and when a cooling medium leaks, the cooling medium can directly permeate into power electronic equipment to cause short circuit danger. And the cooling medium of the phase-cooling cabinet is not in direct contact with the electronic element, and the heat is transferred through the phase-change medium in the middle, so that the power electronic element cannot be damaged even if the leakage of the cooling medium occurs.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of an energy-saving and environment-friendly cooling cabinet according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a phase-cooling plate of an energy-saving and environment-friendly cooling cabinet according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a coil cooling pipeline of an energy-saving environment-friendly cooling cabinet according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a heat dissipation fin of an energy-saving environment-friendly cooling cabinet according to an embodiment of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1 to 4, the cabinet body is generally designed to be in a sealed state for the outdoor operation of the power electronic equipment cabinet due to the requirements of water resistance, dust resistance and corrosion resistance. The heat flow and the long-time sunshine that equipment and components and parts produced in the cabinet lead to the interior heat accumulation of cabinet, are difficult to distribute away. The invention provides an energy-saving, environment-friendly and easy-to-maintain cooling cabinet by utilizing a phase change cooling technology, and solves the problems that equipment is easy to age, unstable to operate and crash, and air conditioner refrigeration is high in energy consumption and difficult to operate and maintain due to long-term high temperature in the cabinet.

The structure of the energy-saving cooling cabinet is shown in figure 1, and the energy-saving cooling cabinet provided by the invention comprises a cabinet shell 1, a phase change medium cavity 3, a cold water coil 2, a phase cooling plate 5, a locking strip 4, a radiating fin 7, a fan 8 and a radiating hole 6.

The shape of the cabinet shell 1 is a cuboid, the materials can be generally selected from stainless steel, and the size is determined according to design requirements. The shell materials of the phase change medium cavity 3 and the phase change plate 5 are aluminum alloy 6061, and the phase change working medium 301 (such as R134A) is filled inside the shell materials. The phase change medium cavity 3 at the top of the cabinet 1 faces to one side of the inside of the cabinet, and the bottom plate 102 of the shell is in a wedge shape corresponding to the upper part and the lower part. The cold plate 5 is inserted into the wedge-shaped groove and locked by the locking strip 4. What top plate 101 adopted on phase cold plate 5 and the rack is the phase transition heat transfer structure, is equipped with liquid cooling coil 2 in the phase transition medium cavity 3, and coil 2 is located the upper middle level position of phase transition medium cavity 3, rises to 2 pipe heights of dish after phase transition working medium 301 evaporates, and with intraductal coolant liquid heat transfer condensation, through the action of gravity backward flow continuation circulation, realize the cooling function of rack. Radiating fins 7 are welded on the outer side of the bottom plate 102 of the shell, radiating holes 6 are formed in the bottom of the shell of the cabinet 1, heat in the cabinet can be directly taken out of the cabinet, an auxiliary cooling effect is achieved, and the radiating effect is further enhanced through the fan 8.

The phase-cooling cabinet utilizes the phase-change heat transfer technology to transfer the heat of the electronic element to the outer side of the cabinet and then utilizes the cooling medium to take away the heat. The heat transfer process has two phase change heat transfer processes, one is the transfer process of the heat of the components and the board cards in the cabinet to the phase cooling plate, and the other is the transfer process of the heat of the phase cooling plate to the top plate.

Referring to fig. 2, the phase cooling plate 5 is made of an aluminum plate, a closed cavity is formed inside the aluminum plate, the phase-change working medium 502 is filled in the cavity, the component or the electronic chip 201 generates heat at a certain point of the phase cooling plate 5, the phase-change working medium 502 in the phase cooling plate 5 absorbs heat to vaporize and rises to the top of the phase cooling plate 5, heat is released through a contact surface with the cabinet to be condensed into a liquid state, gravity flows back to the bottom, and heat absorption and evaporation circulation continues. And the phase change heat transfer technology has the temperature equalization characteristic, and the temperature difference of each point on the cold plate 5 can be controlled within 2 ℃ during working.

Since the module requires a plug-in structure, heat transfer between the cold plate 5 and the cabinet housing 1 can only be achieved by contact. Be equipped with phase change working medium layer 301 on the rack roof, accessible phase change working medium expands the heat to whole rack top surface behind heat transfer to the roof, has improved heat transfer area in other words during the rethread liquid cooling.

Be equipped with cooling water coil pipe 2 in the phase change medium cavity 3 of rack roof, coil pipe 2 is located the upper middle level position of phase change medium cavity 3, rises to coil pipe 2 height after the working medium evaporation, and with intraductal coolant liquid 201 heat transfer condensation, continuous circulation is flowed back through the action of gravity, realizes the cooling of rack.

As shown in fig. 3, the inlet 202 and the outlet 203 of the cold water pipe 2 are connected to a circulating water pump, and the cooling water 201 flows from the inlet 202 to the outlet through a plurality of S-shaped flow channels.

As shown in fig. 4, the heat dissipation fins 7 are installed on the outer side of the bottom plate 102 of the housing, 4 to 6 fans 8 are arranged on the rear side of the fins 7 according to the size of the cabinet, and airflow channels are arranged at corresponding positions of the bottom of the housing 1 to force airflow to flow among the fins 7, so that the flow velocity of the air among the fins 7 is increased, and the heat transfer efficiency is improved. The bottom plate absorbs heat in the cabinet and transfers the heat to the root of the fins, and the heat exchange and condensation between the fins and air realize the auxiliary cooling function of the cabinet

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely a detailed description of the present application, and it should be noted that modifications and embellishments could be made by those skilled in the art without departing from the principle of the present application, and these should also be considered as the protection scope of the present application.

Claims

1. The utility model provides an energy-concerving and environment-protective type cooling rack, includes airtight casing, its characterized in that: the cooling device is characterized by further comprising a first partition plate and a second partition plate which are arranged in the shell, wherein the shell is divided into a first cavity, a second cavity and a third cavity by the first partition plate and the second partition plate from top to bottom, a phase cooling medium is placed in the first cavity, the second cavity is an electric element cavity, at least one cooling plate is arranged in the second cavity, the interior of the cooling plate is hollow, and the phase cooling medium is placed in the cooling plate; the third cavity is a heat sink cavity.

2. The energy-saving environment-friendly cooling cabinet as claimed in claim 1, wherein: still be provided with the dish cold water pipe in the first cavity, the dish cold water pipe is the crisscross distribution of S type, the inlet tube and the outlet pipe of dish cold water pipe outwards extend and link to each other with circulating water pump.

3. The energy-saving environment-friendly cooling cabinet as claimed in claim 1, wherein: be provided with the looks cold plate draw-in groove with second baffle upside under the first baffle, want the cold plate and pass through looks cold plate draw-in groove and locking strip fixed mounting between first baffle and second baffle.

4. The energy-saving environment-friendly cooling cabinet as claimed in claim 1, wherein: and the top plate of the shell is provided with a phase change working medium layer.

5. The energy-saving environment-friendly cooling cabinet as claimed in claim 1, wherein: follow the second baffle extends downwards to and is provided with radiating fin in the third cavity, the radiating fin rear side is provided with the fan.

6. The energy-saving environment-friendly cooling cabinet as claimed in claim 1, wherein: and heat dissipation holes are formed in the surface of the shell of the third cavity.

7. The energy-saving environment-friendly cooling cabinet as claimed in claim 1, wherein: the phase change working medium is R134A.