CN102316705B - Cooling device - Google Patents

Cooling device Download PDF

Info

Publication number
CN102316705B
CN102316705B CN201110189301.XA CN201110189301A CN102316705B CN 102316705 B CN102316705 B CN 102316705B CN 201110189301 A CN201110189301 A CN 201110189301A CN 102316705 B CN102316705 B CN 102316705B
Authority
CN
China
Prior art keywords
cabinet
cold
producing medium
cooling device
heat converter
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.)
Expired - Fee Related
Application number
CN201110189301.XA
Other languages
Chinese (zh)
Other versions
CN102316705A (en
Inventor
正冈久和
山田兼二
名仓新一
竹内哲也
本田伸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP2010151294A external-priority patent/JP5321544B2/en
Priority claimed from JP2010151295A external-priority patent/JP5387523B2/en
Application filed by Denso Corp filed Critical Denso Corp
Publication of CN102316705A publication Critical patent/CN102316705A/en
Application granted granted Critical
Publication of CN102316705B publication Critical patent/CN102316705B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention provides a cooling device. The cooling device comprises an indoor heat exchanger in a cabinet which receives a heating instrument; an outerdoor heat exchanger outside the cabinet; a steam circulation pipe which enables heat exchange between the indoor heat exchanger and the air in the cabinet and guides boiled refrigerant to the outdoor heat exchanger; and a liquid returning pipe which enables heat exchange between the outdoor heat exchanger and the air outside and guides condensed refrigerant to the indoor heat exchanger. The cooling device also comprises a flow adjusting unit with an operation part, which is arranged on the refrigerant circulation flowpath and is displaced by means of the change in the refrigerant pressure or the temperature in the cabinet so as to adjust the circulated refrigerant flow. When the refrigerant pressure is above a set pressure or the temperature in the cabinet is below a set value, the operation part is actuated to stop the refrigerant from flowing. In the cooling device, no power is consumed, and the temperature in the cabinet can be kept within a set range when under no control of the office.

Description

Cooling device
Technical field
The present invention relates to a kind of cooling device, its to take in the cabinet of the heating instruments such as electronic instrument, carry out cooling.
Background technology
Exist at present the electronic instrument situation that for example communication instrument is used of accommodating heating in the cabinet of being sealed.Because cabinet is sealed, so thereby can not be by be directly blown into the extraneous gas cooling communication instrument of taking a breath in cabinet.
Therefore, in the cooling device described in patent documentation 1 (TOHKEMY 2005-140464 communique), the heat dump that air heat absorption from being heated by communication instrument is set in cabinet and cold-producing medium is seethed with excitement, and the upper side at heat dump arranges radiator, described radiator carries out heat exchange to the air outside the vapor phase refrigerant of the explosive evaporation by heat dump and cabinet and makes that vapor phase refrigerant is cooling condenses.Therefore, by heat dump, can be cooling to carrying out in cabinet.
In the cooling device described in patent documentation 1, externally gas is that in the situation that low temperature (for example, under freezing point) and wind are large, temperature in cabinet is because of cooling device excessive descent, and communication instrument may stop.
In order to prevent the low temperature in such cabinet, when thering is heater in cooling device or cabinet, the problem that exists cost to increase.In addition, in order to deal with problems, also consider a kind of by the open and close valve of the electromagnetic type described in patent documentation 1, the refrigerant flow of controlled circulation, thus in the situation that externally gas is low temperature, stop the action of cooling device.But, in the method described in patent documentation 1, office side need to be for detection of the transducer of temperature or humidity, for sending judgement, detect data and control the circuit of the signal of cooling device, power supply source to electromagnetically operated valve.Thus, it is complicated that the structure of office side becomes, and cost increases.In addition, on the capacity of the stand-by power supply when having a power failure, there is boundary, the power consumption that need to cut down cooling device in order to carry out the standby running of official hour.Therefore, wish also to reduce for controlling the power consumption of open and close valve.
Summary of the invention
Therefore, the present invention proposes in view of described problem, and its object is to provide a kind of cooling device, its not power consumption, and from the control of office side, the temperature in cabinet can not maintained to setting range.
According to an example of the present invention, cooling device has: indoor heat converter, and it is arranged at the inside of cabinet of taking in heating instrument, the air in described cabinet and circulate in and carry out heat exchange between inner cold-producing medium; Outdoor heat converter, it is arranged at the outside of described cabinet, carries out heat exchange circulating between inner cold-producing medium and extraneous gas; Vapor stream siphunculus, it carries out heat exchange by the air in described indoor heat converter and described cabinet and the cold-producing medium that seethes with excitement leads described outdoor heat converter; And returning liquid pipe, it is by the cold-producing medium that carries out heat exchange at described outdoor heat converter and described extraneous gas and the condense described indoor heat converter that leads.In described cooling device, cold-producing medium circulates between described indoor heat converter and described outdoor heat converter by seething with excitement in described indoor heat converter and condensing in described outdoor heat converter, at described indoor heat converter, absorbs heat and in described outdoor heat converter dispels the heat to described cabinet, carries out cooling.Described cooling device has flow adjuster, described flow adjuster has operate portions, described operate portions is arranged at the stream for described refrigerant circulation, and the pressure by described cold-producing medium changes or described cabinet in temperature Change be shifted, thereby regulate the refrigerant flow of described refrigerant circulation.Cooling device when the pressure of described cold-producing medium be setting pressure when above, or the temperature in described cabinet is set point when following, described operate portions displacement, thereby the mobile of described cold-producing medium stopped.
Such flow adjuster has operate portions, described operate portions is shifted by the pressure variation of cold-producing medium or the temperature Change in described cabinet, thereby regulate the refrigerant flow of described refrigerant circulation, by the movement of service portion, allow or stop flowing of the cold-producing medium that returns in liquid pipe.Therefore, flow adjuster can not consume any electric power, allows or stops flowing of cold-producing medium.And, do not need for controlling microcomputer of flow adjuster etc. yet.Therefore, do not need for controlling the electric power of flow adjuster yet.Thus, even without the supply of the electricity from outside, signal and power etc., cooling device also can be restrained oneself and be adjusted refrigerant flow, and can will in cabinet, maintain suitable temperature.
For example, described flow adjuster returns on liquid pipe described in also can being arranged on.
And then, described in being arranged on, described operate portions returns on liquid pipe, when the pressure of described cold-producing medium reaches predefined setting pressure when above, described operate portions moves to the position of returning the flow of refrigerant in liquid pipe described in permission, when the pressure of described cold-producing medium is less than described setting pressure, described operate portions moves to the position of returning the flow of refrigerant in liquid pipe described in prevention.For example, when the temperature in cabinet rises because of heating instrument, the temperature of indoor heat converter rises, and the cold-producing medium in indoor heat converter is also heated.When cold-producing medium is heated, the pressure rise of cold-producing medium.When the pressure rise of cold-producing medium, reach the setting pressure of opening and closing device when above, by opening and closing device, allow flowing of cold-producing medium.Thus, due to refrigerant circulation, so cooling device can be brought into play cooling capacity.On the other hand, due to when outside air temperature is low, the temperature of cold-producing medium declines and the pressure step-down of cold-producing medium, so stop the circulation of cold-producing medium when outside air temperature step-down and cold-producing medium are less than setting pressure.When the circulation of cold-producing medium is prevented from, cooling device is not brought into play refrigerating function.Therefore, thereby can prevent because of the cooling temperature that becomes of extraneous gas low temperature cabinet internal cause cooling device too lowly, the instrument that can prevent from generating heat stops.
The described liquid pipe that returns also can have the air in described cabinet and circulate in the heat exchange department that carries out heat exchange between inner cold-producing medium.In the case, when the temperature in cabinet rises, the air in the cabinet of heat exchange department and rising carries out heat exchange, thereby the temperature of cold-producing medium rises.Therefore,, by heat exchange department, follow the temperature rising of the cold-producing medium of the temperature rising in cabinet to become easy.While easily rising due to the temperature when cold-producing medium, the pressure of cold-producing medium easily rises, so can shorten from the temperature in cabinet, rises to the time that flow adjuster allows flow of refrigerant, thereby can improve the response of flow adjuster.Thus, even the in the situation that in cabinet, temperature rising suddenly, opening and closing device also can allow flowing of cold-producing medium at short notice, can bring into play the cooling capacity of cooling device.The temperature that therefore, can prevent the short time in cabinet rises.
Described heat exchange department also can have crooked part, make the inside of described cabinet draw around length elongated.Or described heat exchange department also can be large with the external surface area that described other the part of returning in liquid pipe is compared per unit length, can have and branch into a plurality of parts.
Or in described cooling device, described flow adjuster also can have: action fluid; Seal, it is moving fluid described in inner sealing; Heat exchange department, carries out heat exchange between its described action fluid in described seal and the air in described cabinet; And operate portions, change in volume when it solidifies described action fluid corresponding to the heat exchange by described heat exchange department moves, and by mobile, has the flowing path section area of the stream of described cold-producing medium to be adjusted to the circulation that stops described cold-producing medium circulation.
In the case, when outside air temperature step-down, the temperature in cabinet is also during step-down, and action fluid solidifies, by solidifying the circulation that can stop cold-producing medium.When the circulation of cold-producing medium is prevented from, cooling device is not brought into play refrigerating function.Therefore, thereby can prevent because of the cooling temperature that becomes of extraneous gas low temperature cabinet internal cause cooling device too lowly, the instrument that can prevent from generating heat stops.In addition, when stop the circulation time of cold-producing medium by flow adjuster, the temperature in cabinet is because heating instrument rises, and the fluid that moves melts, and allows flowing of cold-producing medium.Thus, due to refrigerant circulation, so cooling device can be brought into play cooling capacity.
Such flow adjuster has operate portions, and described operate portions is the change in volume while solidifying and move corresponding to action fluid, regulates the flowing path section area of the stream that has cold-producing medium of circulating by movement.Therefore, flow adjuster does not consume any electric power, can by the change in volume of action fluid, allow or stop flowing of cold-producing medium.And, owing to can deciding by the variations in temperature in cabinet the opportunity of prevention, so also do not need for controlling microcomputer of flow adjuster etc.Therefore, do not need for controlling the electric power of flow adjuster yet.Thus, even without the supply of the electricity from outside, signal and power etc., cooling device also can be restrained oneself and be adjusted refrigerant flow, and can will in cabinet, maintain suitable temperature.
For example, described operate portions also can be configured to corresponding to the temperature in the air stream downstream of described indoor heat converter and be shifted.
In addition, described seal is for there being bottom tube-like body, it extends axially along predetermined, and described axial one end is inaccessible, the described axial other end is open, described heat exchange department is the inaccessible part of the described obturation in described seal, and described operate portions is configured to the open portion that plug for seal has the described seal of described stream of action body.
Because heat exchange department is the inaccessible part in seal, so when action fluid solidifies, divide and start to solidify from occlusive part.And, solidify part and to open portion, expand in turn from obturation part.Because operate portions configures to stop up the mode of open portion, so along with the increase of the amount of solidifying of action fluid, the cumulative volume of action fluid increases, and can make operate portions move in the mode of releasing gradually.And, when the action fluid of open portion solidifies, because the everything fluid in seal solidifies, so can make operate portions move to reliably the position of regulation.Thus, can improve the reliability of the action of operate portions.In addition, when stream of action style is during as formation for little by little solidifying from the whole outer peripheral face of seal, the volume that hinders the part of after coagulation by the action fluid first solidifying increases, although may make seal distortion, but by the direction that restriction is solidified as the present invention, also can realize the effect that suppresses seal distortion.
Cooling device can also comprise cover body, and described cover body has thermal insulation, and covers the part except the outer peripheral face of inaccessible part in seal.In the case, heat insulating part can hinder the heat exchange of air in cabinet and action fluid, can prevent that the inaccessible part of action fluid ratio that is positioned at heat insulating part inside from first solidifying.Thus, can from occlusive part, separate initiating reliably and do solidifying of fluid.Therefore, can further improve the reliability of the action of operate portions.
In addition, action fluid can be water, can be grease, can be also other fluid.
Accompanying drawing explanation
Fig. 1 is the pie graph of phone base station that is equipped with the cooling device of the first execution mode;
Fig. 2 means the profile of the pressure-regulating valve (flow adjuster) of the first execution mode;
Fig. 3 means that internal gas blows out the chart of an example of the relation of temperature and extraneous gas temperature;
Fig. 4 means the figure of heat exchange department of an example of the second execution mode;
Fig. 5 means the figure of heat exchange department of other examples of the second execution mode;
Fig. 6 is the pie graph of mobile phone base station that is equipped with the cooling device of the 3rd execution mode;
Fig. 7 means the profile of the flow rate regulating valve (flow adjuster) of the 3rd execution mode;
Fig. 8 means the chart of the specific volume of water;
Fig. 9 means the profile of the flow rate regulating valve of the 4th execution mode;
Figure 10 means the chart of the specific volume of n-pentadecane (normal pentadecane).
Embodiment
Below, with reference to the accompanying drawings of a plurality of execution modes of the present invention.In each execution mode, part corresponding to item having illustrated for the execution mode with above marks identical reference marks, and the repetitive description thereof will be omitted.In addition,, in the situation that the part that each execution mode explanation forms, the part of other of formation is identical with the execution mode illustrating above.In each execution mode not only for the combination of the part illustrating, only otherwise especially to combination results obstacle, also can partially combined execution mode.
(the first execution mode)
About the first execution mode of the present invention, use Fig. 1～Fig. 3 explanation.Fig. 1 is the summary pie graph of phone base station 90 that is equipped with the cooling device 10 of the first execution mode.Phone base station 90 is in the inside that forms the cabinet 12 of confined space, take in communication instrument 11 and form.10 pairs of the cooling devices of present embodiment be provided with in the cabinet 12 of communication instrument 11, carry out cooling.In order to make the region of radio communication, be wide scope, phone base station 90 is arranged at outdoor eminence, such as the ground on roof and the outer wall of building of the buildings such as high building.
Communication instrument 11 has the electronic instruments such as the transceiver that generates heat by working or power amplifier in inside.Such electronic instrument is the heating instrument to external cooling.Cabinet 12 has thermal insulation, specifically by the casing that the parts of urethanes foamed thermal insulating between a plurality of aluminium sheets are formed.In addition, the sidepiece at cabinet 12 is provided with a portion 13.For the ease of safeguarding, door portion 13 is arranged on cabinet 12 and opens and closes freely.
Cooling device 10 is a kind of like this device, and its cold-producing medium by air (also referred to as the internal gas) heat absorption in cabinet 12 is carried heat, and this cold-producing medium, to the air outside cabinet 12 (also referred to as extraneous gas) heat radiation, carrys out cooled interior gas thus.Cooling device 10 has the outdoor heat converter 30 that carries out the indoor heat converter 20 of heat exchange and carry out heat exchange between cold-producing medium and extraneous gas between air in cabinet 12 and cold-producing medium.Indoor heat converter 20 and outdoor heat converter 30 by vapor stream siphunculus 40 with return liquid pipe 50 and be connected, and be arranged on internal circulation and circulation has in the circulation stream of cold-producing medium.Cold-producing medium in circulation stream circulates between indoor heat converter 20 and outdoor heat converter 30, by indoor heat converter 20, absorb heat and carry out the air in cooling case 12 by outdoor heat converter 30 heat radiations, thus the heating instrument of cooling communication instrument 11 grades.The cold-producing medium that is enclosed in the inside of indoor heat converter 20 is for example used HFC.
Indoor heat converter 20 is arranged at the inside of cabinet 12 with the posture tilting with respect to vertical direction.In addition, outdoor heat converter 30 is arranged at the outside of cabinet 12 with the posture tilting with respect to vertical direction.Vertical direction refers to the parallel direction of direction erecting with cabinet 12 in the present embodiment.The direction that cabinet 12 erects is the above-below direction that forms cabinet 12, and each heat exchanger 20,30 is set up under with respect to the laterally inclined state of this above-below direction.
Indoor heat converter 20 has the core 21,22 that carries out heat exchange between the air in circulating in inner cold-producing medium and cabinet 12, and core 21,22 forms by being positioned at the upstream side core 21 of upstream side of air stream and the downstream core 22 that is positioned at the downstream of air stream in the present embodiment.Upstream side core 21 and downstream core 22 are the postures that tilt with respect to cabinet 12, and with respect to the air by core 21,22 by the direction configuration that overlaps.Indoor heat converter 20 is fixed on indoor frame part 14, and indoor frame part 14 is installed in the ceiling inner surface 12a of cabinet 12, indoor heat converter 20 be configured in communication instrument 11 tops regulation space is set.Indoor heat converter 20 laterally, be provided with the indoor fan 23 of the core 21,22 of indoor heat converter 20 being carried to the air in cabinets 12.
Outdoor heat converter 30 has the core 31,32 that carries out heat exchange between the extraneous gas outside circulating in inner cold-producing medium and cabinet 12, and core 31,32 forms by being positioned at the upstream side core 31 of upstream side of air stream and the downstream core 32 that is positioned at the downstream of air stream in the present embodiment.Upstream side core 31 and downstream core 32 are the postures that tilt with respect to cabinet 12, so with respect to the air by core 31,32 by the direction configuration that overlaps.Outdoor heat converter 30 is fixed on the outdoor frame part 15 on the upper surface 12b that is installed on cabinet 12, and is configured in the space that arranges of regulation.Outdoor heat converter 30 laterally, be provided with the outdoor fan 33 of the core 31,32 of outdoor heat converter 30 being carried to extraneous airs.
The indoor heat converter 20 of cooling device 10 and the outdoor heat converter 30 that is disposed at indoor heat converter 20 tops by vapor stream siphunculus 40 with return liquid pipe 50 and be connected, thus, cold-producing medium is in internal circulation the circulation of each heat exchanger 20,30.
Vapor stream siphunculus 40 is connected with the upper side header tank (header tank) 24 that each end of upstream side core 21 at indoor heat converter 20 and downstream core 22 arranges, and the upper side header tank 34 arranging with each end of upstream side core 31 at outdoor heat converter 30 and downstream core 32 is connected, vapor stream siphunculus 40 is pipes of link indoor heat converter 20 and outdoor heat converter 30.Vapor stream siphunculus 40 is to carry out heat exchange and the vaporizing system cryogen of ebullition, gasification is directed to the pipe on the top of outdoor heat converter 30 at indoor heat converter 20 and internal gas.
Returning liquid pipe 50 is connected with the lower side header tank 35 that each end of upstream side core 31 at outdoor heat converter 30 and downstream core 32 arranges, and the lower side header tank 25 arranging with each end of upstream side core 21 at indoor heat converter 20 and downstream core 22 is connected, returning liquid pipe 50 is pipes of link indoor heat converter 20 and outdoor heat converter 30.Return liquid pipe 50 and be the pipe that the liquid refrigerant that makes to condense in outdoor heat converter 30 liquefaction turns back to the bottom of indoor heat converter 20.
Below, the header tank 24,25,34,35 of each heat exchanger 20,30 is described.The lower side header tank 35 of outdoor heat converter 30 hits exactly alignment assembling each other by two bowl-shape sheet materials by shapings such as punching presses and integrated cartridge forms.The side of another in two bowl-shape sheet materials (sides of core 31,32 sides), on the length direction of the extension of cartridge, the interval of regulation is set and is a row ground opening, the opening that formation can be inserted the pipe (not shown) that forms core 31,32, i.e. a plurality of patchholes (not shown).The magnitude setting of a plurality of patchholes is identical with the quantity that is arranged in the pipe on core 31,32.
On the lower side header tank 35 of outdoor heat converter 30, as required, with cover etc., come the both ends of stemming length direction, form except for connecting the space of returning the regulation of all sealing the hole of liquid pipe 50 or the peristomes such as patchhole of pipe.And, when inserting and arranging many pipes of regulation at a plurality of patchholes, form the path of the inside of communicating pipe and the inside of lower side header tank 35.Form like this lower side header tank 35 of outdoor heat converter 30.
The upper side header tank 34 of outdoor heat converter 30 has the connecting portion being connected with vapor stream siphunculus 40, and upper side header tank 34 is the cartridges with the lower side header tank 35 identical formations of outdoor heat converter 30.The upper side header tank 24 of indoor heat converter 20 is the cartridges with the upper side header tank 34 identical formations of outdoor heat converter 30.The lower side header tank 25 of indoor heat converter 20 has and the connecting portion that returns liquid pipe 50 and be connected, and except not having the connecting portion this point being connected with vapor stream siphunculus 40, is the cartridge with the upper side header tank 24 identical formations of indoor heat converter 20.
Below, the core 21,22,31,32 of each heat exchanger 20,30 is described.Because the formation of each core 21,22,31,32 is roughly the same each other, so the upstream side core 31 of outdoor heat converter 30 is described, omits the explanation about the downstream core 32 of outdoor heat converter 30, the upstream side core 21 of indoor heat converter 20 and downstream core 22.The interval that upstream side core 31 to be illustrated by omitting, arrange regulation and many pipes arranging and the fin of the fold-type (corrugate type) between each pipe form.In addition, thereby utilize side plate to be configured to one from these pipes of two-side supporting and the fin of core 31, and be fixed by solder joints.
Dispose between the adjacent pipe of fin, to form with cold-producing medium mobile in pipe and carry out the path that the air of heat exchange passes through.The shape of fin is for example in planar portions, to be formed with partly by punch process to cut a plurality of portions that cut that erect.In order to increase heat exchange area and to improve thermal conductivity, a plurality of portions that cut form in the mode of arranging on by direction at air.The air that has carried out heat exchange with cold-producing medium flows with the part that forms planar portions by fin and in the two sides of the fin side mode moving ahead of wriggling under a plurality of effects that cut portion, therefore, forms sinuous flow and heat exchange amount is increased.
In addition, above-mentioned each parts in outdoor heat converter 30 and indoor heat converter 20 are formed by aluminium, by the solder flux that applies on surface, to welding between above-mentioned each parts, are joined so thus one.
Below, use accompanying drawing 2 explanations to be arranged at the pressure-regulating valve 60 as flow regulator returning on liquid pipe 50.Fig. 2 means the profile of pressure-regulating valve 60.Pressure-regulating valve 60 is arranged at and returns on liquid pipe 50, correspondingly regulates and circulates in the refrigerant amount returning in liquid pipe 50 with refrigerant pressure.Pressure-regulating valve 60 is a kind of opening and closing devices, and when the pressure of cold-producing medium reaches above by predefined setting pressure, it allows flowing of the cold-producing medium that returns in liquid pipe 50, and when being less than setting pressure, flowing of cold-producing medium in liquid pipe 50 returned in its prevention.Therefore, pressure-regulating valve 60 is examples for flow regulator.Setting pressure is for example set to 0.17MPa.Refrigerant pressure and the refrigerant temperature returned in liquid pipe 50 are proportional.Therefore,, when refrigerant temperature step-down, refrigerant pressure is step-down also.
Pressure-regulating valve 60 be take the state variation of cold-producing medium and is carried out work as power source.In other words, pressure-regulating valve 60 does not consume any electric power, is changed to power source carrys out work with state variation, for example variations in temperature and the pressure of cold-producing medium.As the concrete formation of pressure-regulating valve 60, it comprises: the entrance pipe arrangement 61 flowing into from the cold-producing medium of outdoor heat converter 30; The outlet pipe arrangement 62 that cold-producing medium is flowed out to indoor heat converter 20; The valve body 63 that has the pressure-acting of cold-producing medium; And the spring 64 of pressing valve body 63.
Entrance pipe arrangement 61 is the straight tubes in the cross section circle of the above-below direction extension of Fig. 2.Outlet pipe arrangement 62 is the straight tubes in the cross section circle of the left and right directions extension of Fig. 2.In entrance pipe arrangement 61, be provided with the local inaccessible discoideus occlusive part 65 of the above-below direction of entrance pipe arrangement 61.On occlusive part 65, be formed with the through hole 66 that above-below direction connects, in the through hole 66 of occlusive part 65, be provided with bar-shaped valve body 63.In addition, on occlusive part 65, be formed with the entrance hole 65a that above-below direction connects.Entrance hole 65a is the hole for the top of occlusive part 65 that cold-producing medium is led.In addition the fixing abutting part 68 of tubular on the inwall of entrance pipe arrangement 61.The peripheral part of occlusive part 65 is connected to the lower surface of abutting part 68.
Valve body 63 is cylindric, and be configured to can be along the inwall of through hole 66 at upper and lower upward sliding.Spring 64 is connected to the end that is positioned at top of valve body 63, and spring 64 is pressed valve body 63 downwards.Outer peripheral face at valve body 63 is provided with the valve portion 67 that ring-type is outstanding laterally.Valve portion 67 at the pressing force by spring 64 and with the state of the upper surface butt of abutting part 68 under, stop the cold-producing medium that flows through entrance hole 65a to flow to outlet pipe arrangement 62.In addition at valve body 63, slide upward and under the state that separates with abutting part 68, valve portion 67 allows that the cold-producing medium that flows through entrance hole 65a flows to outlet pipe arrangement 62.
The movement of such valve portion 67, in other words the movement of valve body 63 is that pressure-acting by cold-producing medium starts in valve body 63 (valve portion 67).When the pressure-acting of cold-producing medium is during in valve body 63, valve body 63 is under the pressure-acting of cold-producing medium and will be shifted upward.But, because valve body 63 is pressed downwards by spring 64, so when the pressure of cold-producing medium surpasses the pressing force of spring 64, valve body 63 is shifted upward.When the pressure rise of cold-producing medium, thereby and the pressing force valve body 63 that overcomes spring 64 upward during sliding transfer, abutting part 68 and valve portion 67 are separately.Thus, entrance pipe arrangement 61 and outlet pipe arrangement 62 are communicated with, and cold-producing medium flows to outlet pipe arrangement 62 from entrance pipe arrangement 61.Therefore,, by the pressing force of spring 64 is increased and decreased, can change the setting pressure of pressure-regulating valve 60.For example, when increasing the pressing force of spring 64, it is large that setting pressure becomes.
In addition, return liquid pipe 50 and there is the extension 51 working as heat exchange department, the air of described extension 51 in cabinet 12 and circulate in and carry out heat exchange between inner cold-producing medium.Extension 51 is configured in cabinet 12, makes to be easily subject to the impact of the temperature in cabinet 12.Extension 51 is materials that heat conductivity is good, for example, aluminium (comprising aluminium alloy) and copper (comprising copper alloy), consist of.Extension 51 returns the pipe arrangement of liquid pipe 50 and realizes by having extended.Therefore, cold-producing medium is interior mobile at extension 51.Therefore, extension 51 gas and flow between inner cold-producing medium and carry out heat exchange through tube wall externally.
Such extension 51 is positioned at the top of pressure-regulating valve 60.Therefore, passed through the cold-producing medium arrival pressure-regulating valve 60 of extension 51.Extension 51 has crooked part, make the inside of cabinet 12 draw around length elongated.Specifically, extension 51 to extend to form as shown in Figure 1 zigzag.In other words, as crooked part, extension 51 has the acutangulate part of a plurality of bendings.Thus, the pipe range of extension 51 can be larger than the pipe range of lower side header tank 35 that links point-blank pressure-regulating valve 60 and outdoor heat converter 30.Therefore, because the surface area with internal gas heat exchange becomes many, so can increase the heat exchange amount of the cold-producing medium in internal gas and extension 51.
Below, the action of cooling device 10 is described.Causing under the evaporation gasification of cold-producing medium and the state of the liquefaction of condensing, cold-producing medium is with the sequential flowing of the pipe of the lower side header tank 25 → indoor heat converter 20 of the extension 51 → pressure-regulating valve 60 of the lower side header tank 35 of the pipe → outdoor heat converter 30 of the upper side header tank 34 → outdoor heat converter 30 of upper side header tank 24 → vapor stream siphunculus 40 → outdoor heat converter 30 of the pipe → indoor heat converter 20 of indoor heat converter 20 → return liquid pipe 50 → return liquid pipe 50 → indoor heat converter 20, circulation between indoor heat converter 20 and outdoor heat converter 30.And, in the boiling in ducts vaporization of indoor heat converter 20, in the pipe of outdoor heat converter 30, condense, thus, to be provided with in the cabinet 12 of indoor heat converter 20, carry out cooling.
Temperature step-down in cabinet 12, refrigerant temperature is step-down also, and (for example, 0.17MPa), in low situation, pressure-regulating valve 60 is not opened, and refrigerant flow is zero at refrigerant pressure specific pressure, to adjust the setting pressure of valve 60.Owing to not circulating for closure state cold-producing medium of lower time when pressure-regulating valve 60, can say that cooling device 10 is in work halted state, so do not carry out the work in cooling case 12.But, because communication instrument 11 is always operating state, so communication instrument 11 heatings.Because cooling device 10 is work halted state, so the inside temperature of cabinet 12 rises because of communication instrument 11.Therefore, can prevent the decline of the inside temperature that the supercooling of cooling device 10 causes, and can prevent stopping of communication instrument 11.
When the function stop state continuance of cooling device 10 is a little while time, the temperature in cabinet 12 rises because of communication instrument 11.When the temperature in cabinet 12 rises, at extension 51 internal gas and cold-producing medium, carry out heat exchange, the temperature of cold-producing medium rises.In addition, due to the temperature rising of indoor heat converter 20, so the temperature of the cold-producing medium in indoor heat converter 20 also rises.Temperature by such a cold-producing medium rises, and refrigerant pressure also rises, and when refrigerant pressure overpressure is adjusted the setting pressure of valve 60, pressure-regulating valve 60 is opened, flow of refrigerant.Thus, because cooling device 10 is started working, thus performance refrigerating function, inner mercury dropped.Can prevent from like this causing the rising that stops the temperature in such cabinet 12 of communication instrument 11.When inner mercury dropped and refrigerant pressure reach set point when following, pressure-regulating valve 60 is closed again, refrigerant flow vanishing.Then, internal gas temperature rises again.Pressure-regulating valve 60 carries out this action repeatedly corresponding to the pressure of cold-producing medium, thus, the temperature in cabinet 12 can be adjusted to suitable scope (for example, above 20 degree of 5 degree Celsius are following).
Fig. 3 means that internal gas blows out the chart of example of the relation of temperature and extraneous gas temperature.It is the temperature after just blowing out of indoor fan 23 that internal gas blows out temperature.In Fig. 3, with solid line, represent the variations in temperature of the first execution mode, dot the variations in temperature of the form that there is no pressure-regulating valve 60 of prior art.
In the prior art, owing to not thering is pressure-regulating valve 60, so outside air temperature and inner temperature exist proportionate relationship as shown in Figure 3, the temperature when extraneous gas low temperature for example, in when following (5 degree) cabinet 12 may become below the temperature that is suitable for communication instrument 11 (for example 5 spend below).
On the other hand, in the first embodiment, by pressure-regulating valve 60, setting pressure is set, make when outside air temperature be 0 to switch the open and-shut mode of pressure-regulating valve 60 while spending.Owing to being less than 0 when outside air temperature while spending, pressure-regulating valve 60 is closed, and cold-producing medium does not circulate, so inner temperature is maintained to by the heating of communication instrument 11 to the following state of above 20 degree of 5 degree.In addition,, when outside air temperature is 0 degree when above, although inner the temperature rises approaches 20 degree because the heating of communication instrument 11 makes, pressure-regulating valve 60 also becomes open mode at 0 degree when above, starts the circulation of cold-producing medium.Thus, as shown in Figure 3, when outside air temperature is 0 degree when above, cooling device 10 performance cooling capacities, inner mercury dropped, can maintain the state below 20 degree.
The cooling device 10 of present embodiment is as described above being provided with the pressure-regulating valve 60 as opening and closing device using returning of the cold-producing medium guiding indoor heat converter 20 condensing on liquid pipe 50.When the pressure of cold-producing medium reaches setting pressure when above, pressure-regulating valve 60 is allowed flowing of the cold-producing medium that returns in liquid pipe 50, and when being less than setting pressure, pressure-regulating valve 60 stops flowing of the cold-producing medium that returns in liquid pipe 50.In the situation that externally gas is low temperature, the temperature of cold-producing medium declines, and the pressure step-down of cold-producing medium, so stop the circulation of cold-producing medium by pressure-regulating valve 60.When the circulation of cold-producing medium is prevented from, cooling device 10 is not brought into play refrigerating function.Therefore, can prevent because of extraneous gas low temperature, cabinet 12 internal cause cooling devices 10 cooling and situation that the temperature that becomes is too low, and can prevent stopping of communication instrument 11.
When stop the circulation time of cold-producing mediums by pressure-regulating valve 60, the temperature in cabinet 12 rises because of the heating of communication instrument 11, thereby the temperature of indoor heat converter 20 rises, and the cold-producing medium in indoor heat converter 20 is also heated.When cold-producing medium is heated, the pressure rise of cold-producing medium.The pressure rise of cold-producing medium, when reaching the setting pressure of pressure-regulating valve 60 when above, allows flowing of cold-producing medium by pressure-regulating valve 60.Thus, due to refrigerant circulation, so cooling device 10 can be brought into play cooling capacity.
Such pressure-regulating valve 60 is changed to power source with the pressure of cold-producing medium.Specifically, pressure-regulating valve 60 has the valve body 63 that works as there being the service portion of pressure-acting of cold-producing medium, valve body 63 changes and is returning the interior movement of liquid pipe 50 according to the pressure of cold-producing medium, thus, allows or stops the mobile of the cold-producing medium that returns in liquid pipe 50.Therefore, pressure-regulating valve 60 does not consume any electric power, can allow or stop flowing of cold-producing medium.And, owing to deciding action moment by the pressure of cold-producing medium, so also do not need to adjust for controlled pressure the microcomputer etc. of valve 60.Therefore, do not need to adjust for controlled pressure the electric power of valve 60 yet.Thus, even without the supply of the electricity from outside, signal and power etc., the cooling device 10 adjustment refrigerant flow of also can restraining oneself, and can will in cabinet 12, maintain suitable temperature.
In other words, can just can adjust cooling performance less than the supply of the power supply from base station one side, signal, power, thereby can reduce the manufacturing cost of phone base station 90 integral body.In addition, because pressure-regulating valve 60 opens and closes corresponding to refrigerant pressure, so do not need to use transducer and control device etc.And then, so because the simple structure fault of pressure-regulating valve 60 is few, can obtain the structure that reliability is high.
In addition, in the present embodiment, return liquid pipe 50 and there is extension 51.Extension 51 is to the air in cabinet 12 and circulates in the part of carrying out heat exchange between inner cold-producing medium.When temperature in cabinet 12 rises, extension 51 carries out heat exchange with the air in the cabinet 12 having risen, and the temperature of cold-producing medium rises.Therefore,, by extension 51, follow the temperature rising transfiguration of the cold-producing medium that temperature in cabinet 12 rises easy.When the temperature of cold-producing medium easily rises, the pressure of cold-producing medium easily rises, and therefore, can shorten from the temperature in cabinet 12 and rise to the time that pressure-regulating valve 60 is allowed flow of refrigerant.In other words, can improve the response of pressure-regulating valve 60.Thus, even in the interior situation for temperature rising suddenly of cabinet 12, pressure-regulating valve 60 also can allow flowing of cold-producing medium at short notice, can bring into play the cooling capacity of cooling device 10.The temperature that therefore, can prevent the short time in cabinet 12 rises.
In addition, in the present embodiment, extension 51 has sweep, make cabinet 12 inside draw around the length of (draw I and return) elongated.Thus, can increase and can carry out the extension 51 of heat exchange at the surface area of the inside of cabinet 12.Therefore, can by simple formation realize can with cabinet 12 in the air extension 51 that carries out heat exchange.In addition, extension 51, as long as for having the formation of crooked part, be just not limited to zigzag, can be helical form, can be also the shape (bent axle shape) that is right angle by straight tube warpage.
In other words, during for gas low temperature externally, improve intrasystem refrigerant pressure, need extension 51.In the situation that there is no extension 51, may all rise to because of cold-producing medium gasification the outdoor heat converter 30 of extraneous gas side, and, because the indoor heat converter 20 at boiling lateral does not have cold-producing medium, so intrasystem pressure does not rise, pressure-regulating valve 60 may not opened.When pressure-regulating valve 60 is not opened, because cold-producing medium does not circulate, so inner temperature continue to rise, the final communication instrument 11 high temperature abnormality that may become.On the other hand, by extension 51 being set returning on liquid pipe 50, the temperature of the cold-producing medium of extension 51 rises and refrigerant pressure rises, and can open reliably pressure-regulating valve 60.
And then in the present embodiment, in cooling device 10, thereby cold-producing medium is in the interior ebullition, gasification of indoor heat converter 20 and the circulation between indoor heat converter 20 and outdoor heat converter 30 of condensing in outdoor heat converter 30, cooling to carrying out in cabinet 12.According to this formation, by the cooling device 10 of the cooled that indoor heat converter 20 and outdoor heat converter 30 is applied to seethe with excitement, thus, can the heat exchanger that can guarantee high cooling capacity be set during space is set limited, and owing to can not needing for forcibly making the driving part of refrigerant circulation, so compare the cooling device 10 that can obtain freely safeguarding (free maintenance) with the situation with driving part.Thus, can provide a kind of for for example on cold ground, the useful cooling device 10 of phone base station 90 that arranges of place that mountain moderate environment condition is harsh.
(the second execution mode)
Below, about the second execution mode of the present invention, use Fig. 4 and Fig. 5 to describe.Fig. 4 means the figure of an example of the heat exchange department 70A of the second execution mode.Fig. 5 means that other the example of the heat exchange department 70A of the second execution mode is the figure of heat exchange department 70B.In the present embodiment, extension 51 has the point different from the formation of the first described execution mode.
In the first described execution mode, heat exchange department 70A, by drawing the extension 51 around pipe arrangement to form, is still not limited to such formation, as shown in Figure 4, heat exchange department 70A can be configured to than other the part of returning in liquid pipe 50, and the external surface area of per unit length is larger.Specifically, heat exchange department 70A is not the simple prolongation of returning liquid pipe 50, but the pipe arrangement of expansion by diameter forms.
In addition, as shown in Figure 5, heat exchange department 70B also can be configured to have and be branched off into a plurality of parts.Specifically, heat exchange department 70B is not the simple prolongation of returning liquid pipe 50, but the structure of the straight tube of branch is installed.
By such Fig. 4 and the heat exchange department 70A shown in Fig. 5, the formation of 70B, can increase can with cabinet 12 in the air region of carrying out heat exchange.Therefore, can by simple formation realize can with cabinet 12 in the air heat exchange department 70A, the 70B that carry out heat exchange.
In the cooling device of the second embodiment, other part also can consist of to form identical with the first embodiment.
(the 3rd execution mode)
Below, about the 3rd execution mode of the present invention, use Fig. 6-Fig. 8 to describe.
In the first above-mentioned execution mode, return liquid pipe 50 and there is extension 51, described extension 51 is as the air in cabinet 12 and circulate in the heat exchange department that carries out heat exchange between inner cold-producing medium and work.But, in the 3rd execution mode, as shown in Figure 6, return liquid pipe 50 extension 51 is not set, as flow adjuster, arrange and regulate and circulate in the flow rate regulating valve 160 that returns the refrigerant amount in liquid pipe 50 corresponding to the temperature in cabinet 12.The structure of other of the cooling device 10 of Fig. 6 can be identical with Fig. 1, and the description thereof will be omitted.
Below, use Fig. 7 explanation returning the flow rate regulating valve 160 arranging on liquid pipe 50.Fig. 7 means the profile of flow rate regulating valve 160.Flow rate regulating valve 160 is arranged at and returns on liquid pipe 50, corresponding to the temperature in cabinet 12 (also referred to as inner temperature), regulates and circulates in the refrigerant amount returning in liquid pipe 50.Flow rate regulating valve 160 is a kind of flow adjusters, and it regulates and return the refrigerant flow in liquid pipe 50 corresponding to temperature in cabinet 12, during mercury dropped in cabinet 12, stops flowing of the cold-producing medium that returns in liquid pipe 50.
Flow rate regulating valve 160 comprises: for the main part 165 of cold-producing medium circulation; Action fluid 167; Be sealed with the seal 168 of action fluid 167; The effect of stress that the change in volume of action fluid 167 causes valve body 163 thereon; Press the spring 164 of valve body 163; And the cover body 169 that covers the outer peripheral face of seal 168.Flow rate regulating valve 160 be take the change in volume that causes of solidifying of action fluid 167 and is worked as power source.In other words, flow rate regulating valve 160 does not consume any electric power, take to move change in volume that solidifying of fluid 167 cause and work as power source.
Below, each inscape of flow rate regulating valve 160 is described.Main part 165 is formed with the refrigerant flow path 165a for cold-producing medium circulation in inside.Refrigerant flow path 165a extends at the above-below direction of Fig. 7, and the section of inwall is circular.Refrigerant flow path 165a as shown in Figure 6 with return that liquid pipe 50 is interior to be communicated with.One end of refrigerant flow path 165a is the inlet portion 161 from the cold-producing medium inflow of outdoor heat converter 30, and the other end of refrigerant flow path 165a is the export department 162 that cold-producing medium is flowed out to indoor heat converter 20.On the inwall of main part 165, be formed with the through hole 166 connecting at left and right directions.In addition,, on the inwall relative with through hole 166 of main part 165, be formed with the recess 165b that disposes spring 164.
Seal 168 is that the left and right directions of take in Fig. 7 is the cylindrical body of the section circle of axially extending.Seal 168 is for there being bottom tube-like body, specifically, its axial one end (end on the right side in Fig. 7) obturation, the axial other end (end in the left side in Fig. 7) is open.Seal 168 is by the good material of heat conductivity, and for example copper forms.One end of opening of seal 168 is that mode and the main part 165 that open portion 168a is communicated with the through hole 166 with main part 165 links.Select the shape of open portion 168a and through hole 166, make the opening shape of open portion 168a of seal 168 and the shape of size and through hole 166 and size about equally.Fixing seal body 168 on main part 165, so that the inwall of the inwall of through hole 166 and open portion 168a is in same.Action fluid 167 is sealed in seal 168.Move fluid 167 in the present embodiment for water (H 2o), set point is 0 ℃.
Cover body 169 by the material with thermal insulation for example resin form.Cover body 169 is constituted as the part the outer peripheral face that the one end except inaccessible that covers seal 168 is inaccessible part 168b.Therefore, cover body 169 is tubular, rather than has bottom tube-like, and the Length Ratio seal 168 of cover body 169 is short.Therefore, the inaccessible inaccessible part 168b of seal 168 is exposed in internal gas.The heat exchange department 170 of this obturation part 168b for carrying out heat exchange for the action fluid 167 in seal 168 and internal gas.
Valve body 163 is configured to the open portion 168a of plug for seal body 168.In addition, valve body 163 configures to insert the mode of logical through hole 166.Valve body 163 is cylindric, and is configured to and can at left and right directions, slides along the inwall of through hole 166 and the inwall of seal 168.In addition, valve body 163 is constituted as the interior path length than refrigerant flow path 165a.In the end in the left side of valve body 163, be accommodated under the state shown in Fig. 7 of recess 165b, by valve body 163, stop flowing of cold-producing mediums.In other words, by valve body 163, stop up refrigerant flow path 165a.
One end and the end butt that is positioned at the left side of valve body 163 of being disposed at the spring 164 of recess 165b, spring 164 is pressed valve body 163 to the right.Outer peripheral face at valve body 163 is formed with the endless groove 163a caving in the form of a ring to inside.In endless groove 163a, accommodate O shape ring 171, with the tight butt of inwall of seal 168.Thus, preventing from moving fluid 167 spills from the open portion 168a of seal 168.
Below, about action fluid 167, be that water describes.Fig. 8 means the chart of the specific volume of water.As shown in Figure 8, water condenses at 0 ℃, and when condensing, volume increases by 9%.More than the displacement width (stroke) of valve body 163 is at least the internal diameter of refrigerant flow path 165a of main part 165.For example, in the situation that the internal diameter of refrigerant flow path 165a is 15mm, to the stroke T1 of valve body 163 being set as to the situation of 16mm, describe.By make that 16mm increases divided by volume 9%, the length T 2 of part of calculating the action fluid 167 of seal fluid is about 177mm.Thus, by making 177mm be multiplied by the floor space of seal 168, obtain the volume as the required water of action fluid 167.Therefore, when the water of per unit floor space 177mm becomes ice and solidifies, per unit area expansion 16mm.The length T 3 of the part that the 168 pairs of action fluids 167 of seal when becoming ice seal is about 193mm (=177+16).
Below, the action of valve body 163 is described.By action fluid 167, be that the volumetric expansion of water while becoming ice acts on valve body 163, thereby valve body 163 start to move to the left.Temperature in cabinet 12 is below 0 ℃, or when by indoor fan 23, the outer peripheral face of inaccessible part 168b approaches 0 ℃, by the heat exchange of internal gas and water, the water in seal 168 becomes ice.Volumetric expansion while becoming ice due to water, so follow in the volumetric expansion of action fluid 167, the valve body 163 that is positioned at open portion 168a will be shifted to the left.Although valve body 163 is pressed to the right by spring 164, the pressing force to the left of the valve body 163 that volumetric expansion causes surpasses the pressing force of spring 164, and valve body 163 is sliding transfer to the left.When valve body 163 is to the left during sliding transfer, valve body 163 stops up refrigerant flow path 165a gradually, and flowing path section area reduces.And, as shown in Figure 7, in the end in the left side of valve body 163, be accommodated under the state of recess 165b, stop up refrigerant flow path 165a completely, flowing path section area becomes 0.Thus, the temperature in cabinet 12 is below 0 ℃ time, and flowing of cold-producing medium stoped by valve body 163.
In addition,, when action fluid 167 is that ice becomes water, when volume reduces, valve body 163 starts to move to the right.Temperature in cabinet 12 is greater than 0 ℃, or while making the outer peripheral face of inaccessible part 168b be greater than 0 ℃ by indoor fan 23, by the heat exchange of internal gas and ice, ice becomes water.While becoming water due to ice, volume reduces, so the part on the right side of supporting valve body 163 fades away, follows in the volume of action fluid 167 and reduces, the displacement to the right by the pressing force to the right of spring 164.When valve body 163 is to the right during sliding transfer, it is large that flowing path section area becomes gradually.And, in the end in the left side of valve body 163, being contained in completely under the state in through hole 166, flowing path section area becomes maximum.Therefore,, when the temperature in cabinet 12 is larger than 0 ℃, allow flowing of cold-producing medium.
Below, the action of cooling device 10 is described.Causing under the evaporation gasification of cold-producing medium and the state of the liquefaction of condensing, cold-producing medium is with the sequential flowing of the pipe of the lower side header tank 25 → indoor heat converter 20 of the lower side header tank 55 of the pipe → outdoor heat converter 30 of the upper side header tank 34 → outdoor heat converter 30 of upper side header tank 24 → vapor stream siphunculus 40 → outdoor heat converter 30 of the pipe → indoor heat converter 20 of indoor heat converter 20 → return liquid pipe 50 → flow rate regulating valve 160 → return liquid pipe 50 → indoor heat converter 20, thus circulation between indoor heat converter 20 and outdoor heat converter 30.And, by the boiling in ducts at indoor heat converter 20, gasify, in the pipe of outdoor heat converter 30, condense, thereby to be provided with in the cabinet 12 of indoor heat converter 20, carry out cooling.
Temperature step-down in cabinet 12, when lower than the solidifying point (0 ℃) of action fluid 167, action fluid 167 is solidified as ice from water, and volume increases.Because volume increases, so valve body 163 is pressed against recess 165b side.And flowing path section area diminishes gradually, refrigerant flow declines, and the cooling performance of cooling device 10 also declines.And, when valve body 163 stops up refrigerant flow path 165a completely, refrigerant flow vanishing, cold-producing medium does not circulate, and cooling device 10 becomes work halted state.Therefore, the decline of the inside temperature that the supercooling of cooling device 10 causes can be prevented, stopping of communication instrument 11 can be prevented.
But, because communication instrument 11 is always operating state, so communication instrument 11 heatings.Because cooling device 10 is work halted state, so the inside temperature of cabinet 12 rises because of communication instrument 11.When the work halted state of such cooling device 10 continues for some time, temperature in cabinet 12 rises, and when the inside of cabinet 12 temperature is greater than solidifying point, in heat exchange department 170, internal gas and action fluid 167 (ice) carry out heat exchange, ice melts gradually as water, and volume reduces.So valve body 163 is displacement to the right under the effect of spring 164, it is large that flowing path section area becomes, and refrigerant flow increases.In other words, when the temperature by cabinet 12 rises, surpass while moving the solidifying point of fluid 167, valve body 163 moves to the right, and flowing path section area is large from 0 change, thus flow of refrigerant.Thus, because cooling device 10 is started working, thus performance refrigerating function, inner mercury dropped.Like this, can prevent from causing the rising of the temperature in cabinet 12 that communication instrument 11 stops.
Therefore,, when inner mercury dropped is following to solidifying point, flow rate regulating valve 160 is closed again, refrigerant flow vanishing.And when internal gas temperature rises, flow rate regulating valve 160 is opened, cold-producing medium circulates again.Like this, flow rate regulating valve 160 carries out this action repeatedly corresponding to inner temperature, thus, the temperature in cabinet 12 can be adjusted to suitable scope (for example, above 20 degree of 0 degree Celsius are following).
As described above, the cooling device 10 of present embodiment is being provided with flow rate regulating valve 160 by returning of curdy cold-producing medium guiding indoor heat converter 20 on liquid pipe 50.Flow rate regulating valve 160 makes valve body 163 (operating member) displacement corresponding to the temperature in the air stream downstream of indoor heat converter 20.Therefore, flow rate regulating valve 160 regulates the refrigerant flow returning in liquid pipe 50 corresponding to the temperature in cabinet 12.Flow rate regulating valve 160 has valve body 163.Valve body 163 works as operating member, and the change in volume corresponding to action fluid 167 while solidifying and moving regulates until stop the flowing path section area returning in liquid pipe 50 by movement.Therefore, when outside air temperature step-down, the temperature in cabinet 12 is also during step-down, and action fluid 167 solidifies, by solidifying the circulation that can stop cold-producing medium.When the circulation of cold-producing medium is prevented from, cooling device 10 is not brought into play refrigerating function.Therefore, can prevent because extraneous gas low temperature makes the cooling temperature that becomes of cabinet 12 internal cause cooling devices 10 too low, thereby can prevent that communication instrument 11 from stopping.In addition,, when stop the circulation time of cold-producing medium by flow rate regulating valve 160, the temperature in cabinet 12, because communication instrument 11 rises, when action fluid 167 melts, allows flowing of cold-producing medium.Therefore, due to refrigerant circulation, so cooling device 10 can be brought into play cooling capacity.
Therefore, flow rate regulating valve 160 does not consume any electric power, can by the change in volume of action fluid 167, allow or stop flowing of cold-producing medium.And, owing to can deciding according to the variations in temperature in cabinet 12 opportunity that stops flow of refrigerant, so do not need for controlling the microcomputer etc. of flow rate regulating valve 160.Therefore, do not need for controlling the electric power of flow rate regulating valve 160 yet.Thus, even without the supply of the electricity from outside, signal and power etc., the cooling device 10 adjustment refrigerant flow of also can restraining oneself, and will in cabinet 12, maintain suitable temperature.
In other words, can just cooling performance can be adjusted less than the supply of the power supply from mobile phone base station 90 sides, signal, power, the manufacturing cost of mobile phone base station 90 integral body can be reduced.In addition, because flow rate regulating valve 160 opens and closes corresponding to inner temperature, so do not need to use transducer and control device etc.And then, due to the simple structure of flow rate regulating valve 160, so fault is few, can obtain the structure of high reliability.
In addition, in the present embodiment, because heat exchange department 170 is the inaccessible part 168b on seal 168, so when action fluid 167 solidifies, start to solidify from inaccessible part 168b.And, solidify part and from inaccessible part 168b, expand open portion 168a in turn.Because valve body 163 configures to stop up the mode of open portion 168a, so along with the increase of the amount of solidifying of action fluid 167, the cumulative volume of action fluid 167 increases, can little by little release valve body 163 and move it.And, when the action fluid 167 of open portion 168a solidifies, because the whole action fluid 167 in seal 168 solidifies, so can make reliably valve body 163 move to the position of regulation.Thus, can improve the reliability of the action of valve body 163.In addition, when action fluid 167 is for example the formation of solidifying gradually from whole outer peripheral face, the volume of the part of solidifying after hindering by first cakey action fluid 167 increases, although may make seal 168 distortion, but by controlling as in the present embodiment the direction of solidifying, can also realize the effect of the distortion that suppresses seal 168.
In addition, in the present embodiment, also comprise the cover body 169 that there is thermal insulation, the part except the outer peripheral face of inaccessible part 168b of seal 168 is covered.Therefore, the part being covered by cover body 169 can hinder air in cabinet 12 and action fluid 167 carries out heat exchange, and the action fluid 167 that can prevent from being positioned at the inner side of cover body 169 first solidifies than inaccessible part 168b.Thus, can be reliably from inaccessible part 168b, start to move solidifying of fluid 167.Therefore, can further improve the reliability of the action of valve body 163.
In addition, in the present embodiment, because action fluid 167 is water, so can make valve body 163 actions by solidifying the volume increase of the water causing.By like this, by cheapness and hold facile water as action fluid 167, can realize the cooling device 10 of present embodiment.
And then in the present embodiment, in cooling device 10, cold-producing medium is at the interior ebullition, gasification of indoor heat converter 20 and condense in outdoor heat converter 30, thus, between indoor heat converter 20 and outdoor heat converter 30, circulation, cooling to carrying out in cabinet 12.According to this formation, by the cooling device 10 of the cooled that indoor heat converter 20 and outdoor heat converter 30 is applied to seethe with excitement, thus, can the heat exchanger that can guarantee high cooling capacity be set during space is set limited, and can not need for forcibly making the driver part of refrigerant circulation, therefore, compare the cooling device 10 that can obtain freely safeguarding with the situation with driver part.Thus, can provide a kind of on cold ground, the useful cooling device 10 of mobile phone base station 90 that arranges of place that mountain moderate environment condition is harsh.
(the 4th execution mode)
Below, use Fig. 9 and Figure 10 that the 4th execution mode of the present invention is described.Fig. 9 means the profile of the flow rate regulating valve 160 of the 4th execution mode.In the present embodiment, action fluid is different from the action fluid 167 of described the 3rd execution mode, and action fluid is not water, but grease is specifically being n-pentadecane (C 15h 32) there is feature in this point.
Figure 10 means that action fluid 167 is the chart of the specific volume of n-pentadecane.As shown in figure 10, n-pentadecane solidifies in the time of 9 ℃, and when solidifying, volume reduces approximately 3%.While solidifying the in the situation that of water, volume increases, but volume reduces owing to solidifying the n-pentadecane in the situation that, so the direction of the displacement of valve body 163 is contrary with the valve body 163 of flow rate regulating valve 160 in the 3rd execution mode.
As shown in Figure 9, on valve body 163, be formed with the refrigerant holes 163b connecting at above-below direction.Refrigerant holes 163b is configured in the position in seal 168, under the state (state as shown in Figure 9) that to make at n-pentadecane be liquid, refrigerant holes 163b is communicated with refrigerant flow path 165a, under the state that is solid at n-pentadecane, refrigerant holes 163b is not communicated with refrigerant flow path 165a.
More than the displacement width (stroke) of valve body 163 is at least the internal diameter of refrigerant flow path 165a of main part 165.For example, in the situation that the internal diameter of refrigerant flow path 165a is 15mm, the situation that the stroke T1 of valve body 163 is set as to 16mm describes.By making 16mm divided by 3% of volume minimizing, the length T 2 of calculating the part that the action fluid 167 of liquid is sealed is about 533mm.Thus, by be multiplied by the floor space of seal 168 on 533mm, obtain the volume as the n-pentadecane of the required liquid of action fluid 167.Therefore, when the n-pentadecane of per unit floor space 533mm condenses, per unit area expansion 16mm.The length T 3 of the part that the 168 pairs of action fluids 167 of seal while therefore, becoming solid seal is about 517mm (=533-16).
Below, the action of valve body 163 is described.By action fluid 167, be that the volumetric expansion of n-pentadecane while becoming liquid acts on valve body 163, valve body 163 starts to move to the left.Temperature in cabinet 12 is larger than 9 ℃, solidifying point, or while making the outer peripheral face of inaccessible part 168b large than 9 ℃ by indoor fan 23, by the heat exchange of internal gas and n-pentadecane, the n-pentadecane in seal 168 liquefies.Due to volumetric expansion when liquefying, so follow in the volumetric expansion of action fluid 167, valve body 163 will be shifted to the left.Valve body 163 is pressed pressed rightwards by spring 164, but the pressing force to the left of the valve body 163 that volumetric expansion causes surpasses the pressing force of spring 164, and valve body 163 is sliding transfer to the left.When valve body 163 is to the left during sliding transfer, the region of the coincidence of refrigerant holes 163b and refrigerant flow path 165a becomes greatly gradually, and valve body 163 is communicated with refrigerant flow path 165a, increases flowing path section area.And under the state shown in the Fig. 9 overlapping completely at refrigerant holes 163b and the refrigerant flow path 165a of valve body 163, flowing path section area is maximum.Therefore,, when 9 ℃ of cabinet 12 internal ratios are large, allow flowing of cold-producing medium.
In addition,, when action fluid 167 is that n-pentadecane solidifies and volume while reducing, valve body 163 starts to move to the right.Temperature in cabinet 12 is less than 9 ℃, thereby or make the outer peripheral face of inaccessible part 168b than 9 ℃ hours by indoor fan 23, by the heat exchange of internal gas and n-pentadecane, n-pentadecane becomes solid.Volume reduces owing to becoming solid, so the part of the solid on the right side of supporting valve body 163 fades away, follows in the volume of action fluid 167 and reduces, and under the effect of the pressing force to the right of spring 164, valve body 163 is shifted to the right.When valve body 163 is to the right during sliding transfer, flowing path section area diminishes gradually.And, at the refrigerant holes 163b of valve body 163, accommodated under the state in seal 168, stop up stream completely, flowing path section area is 0.Thus, when cabinet 12 internal ratio 9 ℃ hours, flowing of cold-producing medium stoped by valve body 163.
Like this, in the present embodiment, even if action fluid 167 is n-pentadecane, also can reach effect and the effect identical with the 3rd described execution mode.In addition,, because action fluid 167 is n-pentadecane, so solidifying point becomes 9 ℃, compare and can improve solidifying point for the situation of water with action fluid 167.By selection, move fluid 167 like this, can in the temperature range of regulation, form cooling device 10.
In addition, in the present embodiment, as an example of grease, use n-pentadecane as action fluid 167, but be not limited to n-pentadecane, also can be other grease, such as hexadecane (normal hexadecane) and n-heptadecane (normal heptadecane) etc.
In the cooling device of the 4th embodiment, other part can form for the structure identical with the 3rd embodiment.
(other execution mode)
Above, illustrated preferred embodiment of the present invention, but the present invention is not restricted to above-mentioned arbitrary execution mode, can carry out without departing from the spirit and scope of the invention various distortion and implement.
(appending)
In the first above-mentioned execution mode, return liquid pipe 50 and there is extension 51, described extension 51 is as the air in cabinet 12 and circulate in the heat exchange department that carries out heat exchange between inner cold-producing medium and work, but also extension 51 can be set as shown in Figure 6.
In the first described execution mode, heating instrument is communication instrument 11, but is not limited to communication instrument 11, can be also other electronic instrument.In addition, in the first described execution mode, outdoor heat converter 30 and indoor heat converter 20 are configured to overlapping 2 cores 21,22,31,32, but are not limited to such formation, can be 1 core, also can configure by overlapping 3 above cores.
In addition, in the first described execution mode, opening and closing device is pressure-regulating valve 60 as shown in Figure 2, but is not limited to such pressure-regulating valve 60, also can respond to the pressure-regulating valve that changes other such structures of the operating member that moves in the pressure of cold-producing medium for having.In other words, opening and closing device is so long as to be only changed to the mechanical formation of power source with the pressure of cold-producing medium just passable.In the pressure-regulating valve 60 of the first described execution mode, for example replace spring 64, can be also the formation of using weight to press.
In addition, in described the first execution mode and the second execution mode, it is the formation of using extension 51 or heat exchange department 70A, 70B, but because extension 51 and heat exchange department 70A, 70B must form, so also extension 51 can not contained and heat exchange department 70A, 70B form cooling device 10.
In addition, in described the 3rd execution mode and the 4th execution mode, action fluid 167 is water or grease, but is not limited to these materials, also can use other material as action fluid.In the selection of action fluid, can come design discharge to adjust valve 160 based on solidifying point and volume change, thereby realize the cooling device 10 of working in the temperature range of regulation.
In addition, in the flow rate regulating valve 160 of the 3rd described execution mode, for example, replacing spring 164, can be the formation of using weight to press.In addition, flow rate regulating valve 160 for stoping the formation of the circulation of cold-producing medium when action fluid 167 all solidifies, but be not limited to is that action fluid 167 stops the formation of circulation while all solidifying, also can be to move the part of fluid 167, for example, when half solidifies, stop the mode of circulation to regulate the amount of action fluid 167.
In addition, in the 3rd described execution mode, in returning liquid pipe 50, be provided with flow rate regulating valve 160, but be not limited to such position, so long as the circulation stream of cold-producing medium just can, for example in indoor heat converter 20, pack the mechanism of identical structure into, only make heat exchange department 170 also can realize identical effect and effect to the interior outstanding shape of cabinet 12.
In addition, in the 3rd described execution mode, seal 168, main part 165 and valve body 163 are formed by one, but heat exchange department 170 and valve body 163 also can form integratedly.

Claims (7)

1. a cooling device, it has:
Indoor heat converter (20), it is arranged at the inside of cabinet (12) of taking in heating instrument (11), the air in described cabinet and circulate in and carry out heat exchange between inner cold-producing medium;
Outdoor heat converter (30), it is arranged at the outside of described cabinet, carries out heat exchange circulating between inner cold-producing medium and extraneous gas;
Vapor stream siphunculus (40), it carries out heat exchange by the air in described indoor heat converter and described cabinet and the cold-producing medium that seethes with excitement leads described outdoor heat converter; And
Return liquid pipe (50), it is the cold-producing medium that carries out heat exchange at described outdoor heat converter and described extraneous gas and the condense described indoor heat converter that leads,
Described cold-producing medium circulates between described indoor heat converter and described outdoor heat converter by seething with excitement in described indoor heat converter and condensing in described outdoor heat converter, at described indoor heat converter, absorb heat and in described outdoor heat converter dispels the heat to described cabinet, carry out cooling
Described cooling device is characterised in that,
Described cooling device has flow adjuster (160), and described flow adjuster is arranged at the stream for described refrigerant circulation, and is shifted by the temperature Change in described cabinet, thereby regulates the refrigerant flow of described refrigerant circulation,
Described flow adjuster has:
Action fluid (167);
Seal (168), it is moving fluid described in inner sealing;
Heat exchange department (170), carries out heat exchange between its described action fluid in described seal and the air in described cabinet; And
Operate portions (163), change in volume when it solidifies described action fluid corresponding to the heat exchange by described heat exchange department moves, and by mobile, has the flowing path section area of the stream of described cold-producing medium to be adjusted to the circulation that stops described cold-producing medium circulation,
Temperature in described cabinet is set point when following, described operate portions displacement, thus the mobile of described cold-producing medium stopped.
2. cooling device as claimed in claim 1, is characterized in that,
Described in being arranged on, described flow adjuster (160) returns on liquid pipe.
3. cooling device as claimed in claim 1, is characterized in that,
Described operating member (163) is shifted corresponding to the temperature in the air stream downstream of described indoor heat converter (20).
4. cooling device as claimed in claim 1, is characterized in that,
Described seal is for there being bottom tube-like body, and it extends axially along predetermined, and described axial one end is inaccessible, and the described axial other end is open,
Described heat exchange department is the inaccessible part (168b) of the described obturation in described seal,
Described operate portions is configured to plug for seal the open portion of the described seal of described stream of action body (168a).
5. cooling device as claimed in claim 4, is characterized in that
Described cooling device also comprises cover body (169), and described cover body (169) has thermal insulation, and covers the part except the outer peripheral face of described inaccessible part in described seal.
6. the cooling device as described in any one in claim 1～5, is characterized in that
Described action fluid is water.
7. the cooling device as described in any one in claim 1～5, is characterized in that
Described action fluid is grease.
CN201110189301.XA 2010-07-01 2011-06-30 Cooling device Expired - Fee Related CN102316705B (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2010-151294 2010-07-01
JP2010151294A JP5321544B2 (en) 2010-07-01 2010-07-01 Cooling system
JP2010151295A JP5387523B2 (en) 2010-07-01 2010-07-01 Cooling system
JP2010-151295 2010-07-01

Publications (2)

Publication Number Publication Date
CN102316705A CN102316705A (en) 2012-01-11
CN102316705B true CN102316705B (en) 2014-10-22

Family

ID=45429396

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201110189301.XA Expired - Fee Related CN102316705B (en) 2010-07-01 2011-06-30 Cooling device

Country Status (1)

Country Link
CN (1) CN102316705B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8767391B2 (en) * 2012-08-27 2014-07-01 Futurewei Technologies, Inc. Chassis with adjustable baffle for cooling
CN105745553B (en) * 2013-11-13 2019-11-05 皇家飞利浦有限公司 The superconducting magnet system of system and the method for cooling superconducting magnets system are effectively crossed over including calorifics

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06875Y2 (en) * 1987-12-16 1994-01-05 日立電線株式会社 Constant temperature insulation container for electronic equipment
JP4353026B2 (en) * 2003-12-16 2009-10-28 富士電機ホールディングス株式会社 Pure water boiling cooling device with cooling medium opening and closing means

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JP实开平1-94278U 1989.06.21
JP特开2006-13408A 2006.01.12

Also Published As

Publication number Publication date
CN102316705A (en) 2012-01-11

Similar Documents

Publication Publication Date Title
JP6046821B2 (en) Refrigeration system defrost system and cooling unit
CN202581982U (en) A heat exchanger and an air conditioner comprising the same
EP2399089B1 (en) Heat exchanger
CN101842645B (en) Refrigeration cycle device
CN102575881B (en) Air conditioning device
CN102486324A (en) Energy-saving cabinet type air-conditioner
US20110061845A1 (en) Heat exchanger
JP4377634B2 (en) Operation method of cooling system
JP5034435B2 (en) vending machine
CN102316705B (en) Cooling device
CN103890501B (en) Conditioner
JP5447438B2 (en) refrigerator
JP2014115032A (en) Air conditioning device and heating unit
CN203671790U (en) Air conditioner and heat exchange system thereof
CN104613804B (en) Bending pipe fitting and the semiconductor freezer with this bending pipe fitting
JP5387523B2 (en) Cooling system
JP2018048766A (en) Parallel flow heat exchanger and refrigeration cycle device
JP5071083B2 (en) vending machine
WO2015048973A1 (en) Cooling system with thermosiphon, use and method of operating such a system
CN105806111A (en) Heat exchange system based on super thermal conductance principle
JP2005188813A (en) Thermo-siphon type cooling device
CN114111087B (en) Air conditioning system and control method thereof
CN114111085B (en) Air conditioning system and control method thereof
JP5321544B2 (en) Cooling system
CN114111088B (en) Air conditioning system and control method thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20141022

Termination date: 20180630

CF01 Termination of patent right due to non-payment of annual fee