CN103512292A - Refrigeration cycle apparatus - Google Patents

Abstract

From recent study of combustion of an HFC refrigerant that has a low GWP but is flammable, it has been found that the combustion scale tends to increase as the absolute humidity increases. In a refrigeration cycle apparatus using such a refrigerant, it is necessary to increase safety against unexpected refrigerant leakage in consideration of this tendency. This refrigeration cycle apparatus includes a compressor having a compression mechanism section in an enclosed container and configured to compress and discharge a refrigerant so as to circulate the refrigerant in a refrigerant circuit, and an outdoor unit installed outdoors and having a housing divided by a partition plate into a fan chamber and a machine chamber including the compressor. The refrigerant is a flammable HFC refrigerant. The refrigeration cycle apparatus further includes a desiccant attached in thermal contact with a surface of the enclosed container of the compressor whose temperature is increased by a gas refrigerant compressed by the compression mechanism section during operation of the compressor so that the temperature becomes a high temperature near a temperature of the compressed gas refrigerant, and adsorbs water from air in the machine chamber during non-operation of the outdoor unit.

Description

Refrigerating circulatory device

Technical field

The present invention relates to use the refrigerating circulatory devices such as air conditioner with flammable cold-producing medium, relate in particular to the outdoor unit possessing refrigerant compression the compressor that makes it to circulate in refrigerant loop.

Background technology

At present, take in the refrigerating circulatory device that air conditioner is representative, as cold-producing medium, use the such HFC cold-producing medium of R410A.This R410A HCFC cold-producing medium such from R22 is in the past different, although depletion of the ozone layer coefficient ODP is zero, can not damage the ozone layer, and, there is the high such character of global warming coefficient GWP.For this reason, as a ring that prevents global warming, the research of changing to the low HFC cold-producing medium of GWP from the high HFC cold-producing medium of the such GWP of R410A makes progress.

Candidate as the HFC cold-producing medium of such low GWP, has R32(CH2F2; Difluoromethane).In addition, as same candidate cold-producing medium, by the halogenated hydrocarbons in forming with two keys of carbon, for example, there is HFO-1234yf(CF3CF=CH2; Tetrafluoropropane), HFO-1234ze(CF3-CH=CHF).They and R32 are same, are a kind of of HFC cold-producing medium, still, owing to having the unsaturated hydrocarbons of two keys of carbon, are called as alkene, so, for the HFC cold-producing medium difference with do not there are two keys of carbon in composition as R32, mostly use the O of alkene, show as HFO.

The HFC cold-producing medium of low GWP like this (comprising HFO cold-producing medium) is not although be R290(C3H8; Propane) the strong combustion of such HC cold-producing medium degree, but different from non-flame properties R410A, has the combustibility of micro-combustion level, for this reason, note refrigrant leakage.After this, will there is flammable cold-producing medium and be called combustible refrigerant.

Refrigrant leakage with respect to combustible refrigerant, in refrigerating circulatory device in the past, the cold-producing medium of the strong combustion property such as propane of take is object, but, also there is the internal face in the Machine Room of outdoor unit, as cold-producing medium adsorbent, set at least one that select from active carbon, gas absorption resin, clay, activated alumina, molecular sieve, bone black, white clay, silica gel and their two or more mixture, the cold-producing medium that has made to leak is adsorbed in cold-producing medium adsorbent, suppresses the cold-producing medium that leaks to the technology of outside diffusion.(for example,, referring to patent documentation 1).

Technical literature formerly

Patent documentation

Patent documentation 1: TOHKEMY 2000-105003 communique (0011～0020 hurdle, Fig. 3)

But as in the material shown in cold-producing medium adsorbent, especially silica gel, molecular sieve are that drier as the moisture in absorbed air (steam) is known at large, and the material being widely used as drier in patent documentation 1.And, although the Machine Room of outdoor unit and external physical separate,, in the running of this refrigerating circulatory device, for cooling settings electric product in Machine Room etc., utilize the rotation of the Air Blast fan of fan room, new outer gas is imported and passed through in Machine Room from air vent etc.

For this reason, can be described as the cold-producing medium adsorbent that is provided in the internal face of Machine Room and is formed by silica gel, molecular sieve and be exposed to continually flowing of outer gas, adsorb on one's own initiative the moisture in outer gas (room outer air), from laying outdoor unit, starting after not long certain hour, because of absorption moisture saturated, even just in case refrigrant leakage is to Machine Room, can not carry out the absorption of cold-producing medium, existence can not seek to improve the such problem of security.

Suppose that the volumetric concentration of airborne cold-producing medium is in combustible concentration region, there is there some incendiary source and lighted a fire, combustible refrigerant works the burning of fighting, but, its burning scale because of cold-producing medium kind different because the HFC cold-producing medium of low GWP is micro-combustion, so, the HC cold-producing medium of the strong combustion such with propane is compared, its small scale of burning.Here, burning scale refers to that greatly the inverse of burning time is large, for example, and the large such situation of flame that represent that flame transmission is fast, pressure rise large, produces.

Though to for flammable compare with the cold-producing medium of the strong combustion property such as propane burning small scale micro-combustion HFC cold-producing medium combustion phenomena nearest research, evaluate, although be for R32, HFO cold-producing medium, but with regard to their combustion phenomena, existence absolute humidity under identical conditions is larger, the tendency that burning scale is larger.For this reason, as cold-producing medium, using the low GWP as R32, HFO cold-producing medium but having in the refrigerating circulatory device of flammable HFC cold-producing medium of micro-combustion level, there is problem as follows: though be micro-combustion, but must be based on such burning scale and the dependency relation of absolute humidity, improve for cold-producing medium just in case the security of leaking.

Summary of the invention

The present invention is the invention of making in order to solve problem as described above, and the cold-producing medium of usining when a kind of raising is provided for situation as described below is just in case the refrigerating circulatory device of the security of leaking is object: described situation is used the low GWP as R32, HFO cold-producing medium but had flammable HFC cold-producing medium as the situation of cold-producing medium.

Refrigerating circulatory device of the present invention possesses: refrigerant loop; Compressor, it has compression mechanical part in closed container inside in this refrigerant loop, and refrigerant compression discharge are made it to circulate in refrigerant loop; Outdoor unit, it is placed without, framework inside is separated plate and is divided into the fan room with outdoor Air Blast fan and outdoor heat converter and the Machine Room that configures compressor, cold-producing medium is to have flammable HFC cold-producing medium, this refrigerating circulatory device possesses drier, the surface heat of the closed container of the compressor that described drier and temperature in the work of compressor raise by the refrigerant gas heating of having been compressed by compression mechanical part is mounted contiguously, described drier, in the running of outdoor unit stops, adsorbing the indoor airborne moisture of machinery.

According to the present invention, because in running stops, the indoor airborne moisture of drier absorption machinery, can will in Machine Room, maintain the state that absolute humidity is little, so, even just in case the leakage that produces flammable HFC cold-producing medium in Machine Room, when the concentration of the cold-producing medium leaking is flammable area, leakage of refrigerant is on fire because of certain incendiary source, also can its burning scale be suppressed littlely, can provide and improve for cold-producing medium just in case the refrigerating circulatory device of the security of leaking.

Accompanying drawing explanation

Fig. 1 is the pie graph that comprises the refrigerant loop of the refrigerating circulatory device in embodiments of the present invention 1.

Fig. 2 is the stereoscopic figure of the outdoor unit of the refrigerating circulatory device in embodiments of the present invention 1.

Fig. 3 is by the stereogram above and under the state pulled down of the panel of end face of the outdoor unit shown in Fig. 2.

Fig. 4 means the stereogram of the electric product unit periphery of Machine Room.

Fig. 5 means the mobile schematic diagram of the cooling-air stream of electric product unit.

Fig. 6 means other the mobile schematic diagram of air stream in the Machine Room different from Fig. 5.

Fig. 7 is installed on drier in the schematic diagram of the form of compressor by the fixed part different from the fixed part shown in Fig. 2.

Fig. 8 is the longitudinal section of the signal of the fixed part periphery shown in Fig. 7.

Fig. 9 means the schematic diagram of the fixed part of the form different from the fixed part shown in Fig. 7.

Figure 10 is installed on drier in the schematic diagram of the form of compressor by the fixed part different from the fixed part shown in Fig. 7.

Figure 11 is the sectional elevation of the signal of the fixed part periphery shown in Figure 10.

Figure 12 means that drier is to the schematic diagram of the position of the compressor surface installation form different from Fig. 3.

Figure 13 means the figure of the drier of the structure different from the drier shown in Fig. 3.

Figure 14 means the figure of the drier of the structure different from the drier shown in Figure 13.

Description of reference numerals

2: outdoor unit; 3: compressor; 3a: upper cover (closed container); 3b: cylindrical container (closed container); 3c: bottom (closed container); 5: outdoor heat converter; 8: outdoor Air Blast fan; 13: top panel (framework); 14: fan room's front panel (framework); 15: Machine Room front panel (framework); 16: Machine Room side panel (framework); 17: base plate (framework); 19: air entry; 20: demarcation strip; 21: blow-off outlet; 24: electric product unit; 26: Denso substrate; 30: drier; 31: drier; 32: drier; 40: bandage; 41: pocket; 42: netted pocket; 43: retainer.

The specific embodiment

Embodiment 1.

Below, one side is referring to Fig. 1 to Figure 14, and one faces embodiments of the present invention 1 describes.Here, use carry out refrigeration within doors, the air conditioner heating describes as refrigerating circulatory device, this refrigerating circulatory device is used cold-producing medium by compressor compresses and makes it circulation, from low-temperature heat source heat absorption and to the kind of refrigeration cycle of high temperature heat source heat extraction.

Fig. 1 is the pie graph schematically representing as the structure of the air conditioner 100 of the refrigerating circulatory device of this embodiment 1, also represents the refrigerant loop of kind of refrigeration cycle.This air conditioner 100 is by being arranged on indoor unit 1 within doors and being placed minute bodily form that outdoor unit 2 without forms, by connecting pipings 10a, 10b, refrigerant loop being connected between indoor unit 1 and outdoor unit 2.Connecting pipings 10a is the connecting pipings of the mobile hydraulic fluid side of liquid refrigerant, and connecting pipings 10b is the connecting pipings of the mobile gas side of gas refrigerant.

In outdoor unit 2, dispose the compressor 3 of compression discharging refrigerant, when cooling operation and heat when running by the refrigerant flow path transfer valve 4(of the flow direction change of the cold-producing medium in refrigerant loop hereinafter referred to as cross valve 4), carry out the outdoor heat converter 5 as heat source side heat exchanger of the heat exchange of outer gas and cold-producing medium, the decompressor 6(such as electronic control type expansion valve that can change aperture and be low pressure by the cold-producing medium decompression of high pressure are hereinafter referred to as expansion valve 6), the conduct that configures the heat exchange of carrying out room air and cold-producing medium in indoor unit 1 utilizes the indoor heat converter 7 of side heat exchanger.They are connected successively by the metal refrigerant piping that comprises connecting pipings 10a, 10b, form refrigerant loop, that is, by compressor 3, the compression heat pump of refrigerant circulation is circulated.

In the refrigerant piping that these various devices are connected, here, discharge side at compressor 3 is called the refrigerant piping connecting to cross valve 4 entrances from compressor 3 to discharge pipe arrangement 12, in addition, the suction side at compressor 3 is called the refrigerant piping connecting to compressor 3 from cross valve 4 to suck pipe arrangement 11.No matter when cooling operation, while still heating running, always the gas refrigerant of the HTHP being compressed by compressor 3 flows in discharging pipe arrangement 12, the cold-producing medium that has passed through the low-temp low-pressure of evaporation flows in sucking pipe arrangement 11.In sucking pipe arrangement 11 in the promising gas refrigerant of cold-producing medium of mobile low-temp low-pressure, also in the promising two-phase state that mixes a small amount of liquid refrigerant in gas refrigerant.

In outdoor unit 2, near outdoor heat converter 5, configuration, as the outdoor Air Blast fan 8 of pressure fan, makes outdoor Air Blast fan 8 rotations, is created on thus the air stream that outdoor heat converter 5 passes through.In this outdoor unit 2, as outdoor Air Blast fan 8, use propeller type fan, outdoor Air Blast fan 8, in the air stream that outdoor Air Blast fan 8 generates by this, is positioned at the downstream of outdoor heat converter 5.

Equally, in indoor unit 1, indoor Air Blast fan 9 is set near indoor heat converter 7, the rotation by this indoor Air Blast fan 9 is created on the air stream that indoor heat converter 7 passes through.In addition, indoor Air Blast fan 9, according to the form of indoor unit 1, is used cross flow fan or adopts turbofan, is various., in the air stream that indoor Air Blast fan 9 generates by this, there is the situation in the downstream of indoor heat converter 7 ，Qi position in addition, also has the situation at upstream side.

In Fig. 1, the flow direction of cold-producing medium when solid arrow represents cooling operation.In cooling operation, cross valve 4 is switched to refrigerant loop such shown in solid line, and first the gas refrigerant of the HTHP of discharging from compressor 3 flows into outdoor heat converter 5 through cross valve 4, and this outdoor heat converter 5 plays a role as condenser.The air stream generating in the rotation by outdoor Air Blast fan 8 when the outdoor heat converter 5, the room outer air of passing through and mobile cold-producing medium heat exchange in outdoor heat converter 5, the condensation heat of cold-producing medium is given room outer air.So, cold-producing medium, by outdoor heat converter 5 condensations, becomes the liquid refrigerant of high pressure low temperature, then, by expansion valve 6 adiabatic expansions, becomes the two-phase system cryogen (cold-producing medium of the state that liquid refrigerant and gas refrigerant mix) of low-pressure low-temperature.

Then, at indoor set 1, cold-producing medium flows into indoor heat converter 7, and this indoor heat converter 7 plays a role as evaporimeter.The air stream producing in the rotation because of indoor Air Blast fan 9 is when indoor heat converter 7 passes through, the room air passing through and mobile cold-producing medium heat exchange in indoor heat converter 7, cold-producing medium is captured heat of evaporation and evaporates from room air, and the room air being passed through is cooled.Cold-producing medium evaporates in indoor heat converter 7, to mix in the gas refrigerant at low-temp low-pressure or gas refrigerant, has the state of the two-phase system of a small amount of liquid refrigerant cryogen to be sucked by compressor 3, by compressor 3 cold-producing medium of boil down to HTHP again.In cooling operation, repeatedly carry out this circulation.

In Fig. 1, the flow direction of cold-producing medium when dash-dot arrows represents to heat running.If cross valve 4 is switched to by refrigerant loop such shown in chain-dotted line, cold-producing medium contrary direction when with cooling operation flows, first to indoor heat converter 7, flow into, this indoor heat converter 7 is played a role as condenser, and outdoor heat converter 5 is played a role as evaporimeter, to the room air passing through at indoor heat converter 7, give condensation heat, heat, become and heat running.

In this air conditioner 100, as cold-producing medium mobile in refrigerant loop, use the global warming coefficient GWP R32(CH2F2 as HFC cold-producing medium less and fewer on the impact of global warming than the HFC cold-producing medium R410A being used widely at present in air conditioner; Difluoromethane).

In addition, cold-producing medium is not limited to this R32, although can be also a kind of of the illustrated HFC of being cold-producing medium above, has the halogenated hydrocarbons of two keys of carbon in composition, for example HFO-1234yf(CF3CF=CH2 that global warming coefficient GWP is less than R32 cold-producing medium; Tetrafluoropropane), HFO-1234ze(CF3-CH=CHF) the HFO cold-producing medium such as.In addition, can be also in forming, not there is the HFC mix refrigerant of the R32 of two keys of carbon and the low GWP of one or more mixing of above-mentioned HFO cold-producing medium.

Fig. 2 is the stereoscopic figure of the outdoor unit 2 of this air conditioner 100, and Fig. 3 pulls down a part for the framework of this outdoor unit 2, represents the stereogram of internal structure.Forming the framework of the outline of outdoor unit 2 will a plurality of tabular sheet-metal parts combination and form, at the base plate 17(of bottom that bears this framework referring to Fig. 3) demarcation strip 20 that separates about arranging the inside of outdoor unit 2 (framework inside) of upper vertical ground.By this demarcation strip 20, be divided into the F of fan room with outdoor Air Blast fan 8 and outdoor heat converter 5, and configure compressor 3, refrigerant piping group 23,24 Machine Room, electric product unit M.

In addition, refrigerant piping group 23 refers in Fig. 1 following refrigerant piping general name and the refrigerant piping group of address like this: the refrigerant piping that gas side connecting pipings 10b and cross valve 4 are engaged, suck pipe arrangement 11, discharge pipe arrangement 12, cross valve 4, the refrigerant piping that cross valve 4 and outdoor heat converter 5 are engaged, the refrigerant piping that outdoor heat converter 5 and expansion valve 6 are engaged, expansion valve 6, refrigerant piping that expansion valve 6 and hydraulic fluid side connecting pipings 10a are engaged.

The framework of the outline of formation outdoor unit 2 is except base plate 17, also by covering positive fan room's front panel 14 of the F of fan room, cover the positive of Machine Room M and become the place ahead part of Yi Ce contrary to demarcation strip 20 side L Zi Zhuan Machine Room front panel 15, the rear part of side of covering Machine Room M and the L Zi Zhuan Machine Room side panel 16 at the back side, across the F of fan room and Machine Room M go up and cover outdoor unit 2 above top panel 13 form, these panels are sheet-metal parts.In addition, the panel that forms these frameworks can more carefully be decomposed and be formed, and it is also no problem that several are shaped integratedly.Fig. 3 is the state that the front panel 14, of the top panel 13, fan room Machine Room front panel 15 in framework is pulled down.In addition, in Fig. 3, omitted the diagram of electric wiring class.

On fan room's front panel 14, form opposite to each other the blow-off outlet 21 of circular with outdoor Air Blast fan 8, this blow-off outlet 21 passes Air Blast fan 8 outside collision cell in order to prevent any object at blow-off outlet 21, and the fan shroud 22 of having guaranteed draught area is installed.In addition, details will be set forth bottom, side panel 16 side, ， Machine Room in the back, shape the air entry 19 becoming in running for the entrance of the air stream of cooling electric goods unit 24 by shutter.In addition, air entry 19 can be formed on the side panel 16 back side, Machine Room, front panel 15 side, Machine Room, also can be formed on a plurality of positions.The internal communication of air entry 19Jiang Wu Waihe Machine Room M.

The cross section of outdoor heat converter 5 is L word shape roughly, with its long leg, divides the mode at the position, the back side that is positioned at the F of fan room to be fixed on base plate 17.And its short side part is positioned at and the sideway stance that becomes the contrary side of demarcation strip 20 of the F of fan room.Outdoor Air Blast fan 8 is arranged in long leg Fen the place ahead of the outdoor heat converter 5 of the F of fan room.Become the upstream side that outdoor heat converter 5 is positioned at the air stream generating because of outdoor Air Blast fan 8 rotations, outdoor Air Blast fan 8 is positioned at the form in downstream.

At the rear of outdoor Air Blast fan 8, dispose through rotating shaft and outdoor Air Blast fan 8 and link, the fan motor 8a that outdoor Air Blast fan 8 is rotarilyd actuate.And fan motor 8a is fixed in fan motor gripper shoe 25, this fan motor gripper shoe 25 is fixed on base plate 17 and is upright.Fan motor gripper shoe 25 at fore-and-aft direction between the long leg of outdoor Air Blast fan 8 and outdoor heat converter 5 divides.

M Zhong， bottom, ， Machine Room arranges other the large compressor 3 of equipment of weight ratio on base plate 17 through vibration-proof rubber on the other hand.Compressor 3 has: compression mechanical part, and the compressing member of compression mechanical part is at the internal rotating of closed container and by refrigerant compression, and above-mentioned closed container consists of upper cover 3a, cylindrical container 3b and the bottom 3c of steel formability; Make the motor part of the compressing member rotary actuation of compression mechanical part.This compressor 3 is high pressure hull shape formula, suction cold-producing medium from suction line 11 directly flows into the compressing member of compressor means portion, the refrigerant gas having been compressed by compression mechanical part is discharged for the time being from compression mechanical part in closed container, to the discharge pipe 12 with being communicated with in closed container, flows out.For the compressor 3 of such high pressure hull shape formula, make closed container inner space become the cold-producing medium environment of the HTHP being compressed by compression mechanical part.

At the compression mechanical part of this compressor 3, as the type of compressing member, adopt vortex, this vortex is by fixing a side of the scroll wrap of combination, make the opposing party's gyration reduce gradually the volume of the discharge chambe being formed by the combination of scroll wrap, accordingly, by refrigerant compression.In addition, the type of compressing member is not limited to vortex, for example, also can be other type of rotary grade, described rotary be by circular piston eccentric rotary and reduce to be gradually formed on the volume of the discharge chambe between cylinder inner peripheral surface and piston outer peripheral face in the space of cylinder interior cylindraceous, accordingly, by refrigerant compression.

At least become compressor 3 above the top of Machine Room M dispose the electric product unit 24 of accommodating Denso substrate 26, this Denso substrate 26 is provided with the electrical/electronic part of formation control device etc., and above-mentioned control device is for controlling the running of this air conditioner 100 in linkage with the control device of indoor unit 1.Fig. 4 means the stereogram of electric product unit 24 peripheries on the top that is configured in Machine Room M.Right side wall in the framework of electric product unit 24 is provided with the passage 27 consisting of a plurality of apertures.And, at the left side wall that becomes demarcation strip 20 sides, be also formed with same passage 28.

The passage 28 of this left side wall is towards being formed on the Machine Room M on demarcation strip 20 top and the intercommunicating pore 29 that the F of fan room is communicated with.The intercommunicating pore 29 of demarcation strip 20 becomes the through hole of the such big or small essentially rectangular shape in the whole region of passage 28 of the framework left side wall of accommodating electric product unit 24 in Qi region.Framework left side wall and the demarcation strip 20 of electric product unit 24 join.And, be arranged in the compressor 3 of bottom and the space of the Machine Room M beyond superposed electric product unit 24 around ground configuration refrigerant piping group 23.

Then, the basic effect of this outdoor unit 2 is described.If the running sign on from user is transferred to this air conditioner 100, control device and indicated operation mode (cooling operation or heat running) correspondingly make cross valve 4 actions for switching the stream of refrigerant loop.And, to fan motor 8a energising, make outdoor Air Blast fan 8 rotations.And, make compressor 3 startings, cold-producing medium is circulated in refrigerant loop.

Control device makes compressor 3 startings with the starting speed of low speed of regulation, towards with air conditioner load definite rotating speed of target correspondingly, improve gradually the rotating speed of compressor 3.After arriving rotating speed of target, if the difference of design temperature and indoor temperature diminishes, reduce gradually the rotating speed of compressor 3.The rotating speed of outdoor Air Blast fan 8 is also changed with the rotating speed of compressor 3 substantially in linkage.

By the rotation of outdoor Air Blast fan 8, gas from the back side of the outdoor Air Blast fan 8 as propeller type fan, side surface direction attract, the air stream that generation blows out at the blow-off outlet 21 of fan room's front panel 14 openings opposite to each other from the place ahead with outdoor Air Blast fan 8, this air stream is when the outdoor heat converter 5, and in the mobile cold-producing medium heat exchange of outdoor heat converter 5.If the air cooling operation passing through at outdoor heat converter 5, is heated by the condensation heat of cold-producing medium, if heat running, capture heat of evaporation and turn cold for cooled dose.Air after heat exchange is blown out again from blow-off outlet 21Xiang room.

In the running at this air conditioner 100, be arranged in the electrical/electronic part of the Denso substrate 26 on electric product unit 24, a part for mobile electric current is transformed to heat energy and generates heat, and temperature rises, and therefore, needs cooling.For this reason, in this outdoor unit 2, be different from the air stream by outdoor heat converter 5 heat exchanges, by the rotation of outdoor Air Blast fan 8, generate for the on-stream cooling air stream that carries out 24 inside, electric product unit.Fig. 5 means the mobile explanation schematic diagram of the cooling-air stream of electric product unit 24, and the arrow in figure represents cooling-air stream.

Work in 24 inside, electric product unit that the sucking action being produced by the rotation of outdoor Air Blast fan 8 is communicated with through the passage 28Hai Duiyu F of fan room of the intercommunicating pore 29 of demarcation strip 20 and the framework left side wall of electric product unit 24, the air in electric product unit 24 is attracted through the outdoor Air Blast fan 8 of passage 28 and the intercommunicating pore 29Xiang F of fan room.

In order to compensate the air attracting to the F of fan room, the air of Machine Room M is from passage 27 24 inflows to electric product unit of the framework right side wall of electric product unit 24.Zai You， Machine Room M is communicated with outside the air entry 19Yu room by Machine Room side panel 16 bottoms, in order to compensate the 24 leaked-in air ，Xin room outer air to electric product unit, through air entry 19, flows into Machine Room M.

Like this, by outdoor Air Blast fan 8 rotations, be different from the air stream passing through at outdoor heat converter 5, utilize the sucking action of the outdoor Air Blast fan 8 in rotation, generation flows into the M of Bing Machine Room and rises from air entry 19, at left and right directions, traverses the air stream (air stream in cooling electric goods unit 24) that the F of Qie Xiang fan room flows out in by electric product unit 24.

The cooling-air stream of this electric product unit 24 makes the air entry 19 that passes side panel 16 bottoms in Machine Room from the air outside room be imported into the beginning of M place, Machine Room in outdoor Air Blast fan 8 rotations by the F of fan room.Cooling-air stream enters in electric product unit 24 from the passage 27 of the framework right side wall of the inflow entrance in becoming from Machine Room M to electric product unit 24, in left and right directions traverses electric product unit 24, from the passage 28 of left side wall, through the intercommunicating pore 29 of demarcation strip 20, be directed to the F of fan room.Traversing electric product unit 24 when interior, cooling-air flows to pass through in the mode of left and right directions crosscut Denso substrate 26., for example make, from the heat heat radiation of electrical/electronic part (, the smmothing capacitor etc.) discharge of the Denso substrate 26 of heating at work for this reason, the electrical/electronic part of these heatings is cooling.

Like this, the cooling-air of electric product unit 24 stream is traversing along left and right directions in the process of the F of fan room side inflow electric product unit 24 is interior, and cooling gradually to take Denso substrate 26 be the main electrical/electronic part in electric product unit 24 that is configured in.And this cooling-air stream that the F of ，Xiang fan room flows into attracted by outdoor Air Blast fan 8, with outdoor heat converter 5 by and carried out from blow-off outlet 21Xiang room, blowing out together with the air (main air flow) of heat exchange.The part being communicated with at demarcation strip 20Zhong， Machine Room M and the F of fan room is only the intercommunicating pore 29 that this cooling-air stream passes through, and the flowing of air of the rotation ，Cong Machine Room M guiding F of fan room by outdoor Air Blast fan 8 is only that this cooling-air flows.

Above, be basic structure and the effect of this outdoor unit 2.As previously mentioned, this air conditioner 100, as cold-producing medium mobile in refrigerant loop, uses the HFC cold-producing medium (being R32) that prevents the effective low GWP of global warming here.Because such HFC cold-producing medium is micro-combustion, so, need to be for cold-producing medium just in case the high security of leaking in air conditioner 100.

Also once setting forth above, although are low GWP for these, but the HFC cold-producing medium (R32, HFO) that shows micro-combustion, according to the recently research to these cold-producing mediums, the evaluation of the scale of especially burning is known, and existing beyond absolute humidity is (in identical cold-producing medium kind under identical condition, with identical refrigerant gas concentration, in the situation of identical incendiary source igniting), absolute humidity is larger, the tendency that burning scale is larger.In experimental box, enclose refrigerant gas, now, the refrigerant gas concentration of enclosing in case becomes flammable area (if R32 is 14.4～29.3vol%; If HFO1234yf is 6.2～12.3vol%) certain specific such amount of value, by being arranged on the agitation fan in case, make the refrigerant gas CONCENTRATION DISTRIBUTION in case even.

And, to the nickel chrom heater energising being arranged in case, heat this heater, until the cold-producing medium igniting in experimental box.Observe cold-producing medium igniting, burning, the process till burning nature stops, in addition, evaluates combustion range, burning time, pressure rise situation etc., and they are comprehensive, the size of judgement burning scale.Absolute humidity in experimental box is measured by absolute humidity sensor, and refrigerant gas concentration is identical confirmation, by confirming identical replacement of oxygen concentration in case by oxymeter.

The absolute humidity of take in experimental box is that parameter is implemented the repeatedly evaluation of so micro-combustion HFC cold-producing medium, find larger in absolute humidity, the tendency that burning scale is larger.In addition, absolute humidity changed certainly according to the weather of this day, season, the moment etc.From the result obtaining by this evaluation, derive idea as follows: the situation that absolute humidity is little in the situation that with respect to the refrigerant concentration of air R32, the HFO cold-producing medium in flammable area on fire because certain reason is provided kindling material (having incendiary source), can make its burning small scale, what for cold-producing medium contingency, leak is safe.

Therefore, in this outdoor unit 2, in order to improve the security for the leakage of the contingency of the cold-producing medium of refrigerant piping group 23 grades from the M of Machine Room, the drier 30 that the silica gel of the moisture of configuration in absorbed air forms in the M of Machine Room, to keep littlely by the absolute humidity in the M of Machine Room.Have again, structure as the feature of this outdoor unit 2, as shown in Figure 3, is configured in this drier 30 outer surface of the compressor 3 of high pressure hull shape formula, in detail, configure contiguously with the lateral surface of the cylindrical container 3b of a closed container part as compressor 3.

This drier 30 is to be accommodated in to have the metal-made of aeration or have in stable on heating resinous mesh bag and to form being configured as the granular silica gel as desiccant material.In the scope that the size of the mesh of mesh bag can outwards not spill at granular colloidal silica, form greatly, inner silica gel can be ventilated with the space of Machine Room M.

Here, above-below direction at compressor 3 is vacated distance, on the cylindrical container 3b of compressor 3, by all directional rings along this cylindrical container 3b around the metal bandage 40 that forms of two helical springs drier 30 is arranged on to the lateral surface (surface) of the cylindrical container 3b of compressor 3 with contact condition.In other words, drier 30 is bundled in the lateral surface of the cylindrical container 3b of compressor 3 by bandage 40.

Metal bandage 40 two ends are formed respectively hook shape, by the mutual hook of hook at these two ends, by around being fixed on the cylindrical container 3b of compressor 3.By the bandage 40 around fixing by helical spring elastic force, by drier 30 by the lateral surface that is pressed in cylindrical container 3b.Drier 30, by the elastic force of bandage 40, is clamped by bandage 40 and cylindrical container 3b.Drier 30 is owing to being the structure of holding granular silica gel in mesh bag, so, by the pressing force producing because of bandage 40, along curved surface (profile) distortion of cylindrical container 3b, become lateral surface with the cylindrical container 3b state to contact on a large scale.

In addition, bandage 40 can not be also helical spring, so long as with the state by around fixing the power of tying tight by bandage 40 by drier 30 by the parts that are pressed in the lateral surface of cylindrical container 3b.In addition, bandage 40 can not be also metal-made, but has stable on heating resin.

In the running of outdoor unit 2 stops, due to the sucking action not having by the rotation generation of outdoor Air Blast fan 8, so, the not discrepancy of the air of the active outside generation and room in the M of Machine Room.In addition, the discrepancy of the air of this active does not refer to that the action as this outdoor unit 2 does not import or the such situation of discharged air to Machine Room M, is in fact the state that substantially there is no the discrepancy of air.During state in such running stops, owing to configuring drier 30 in the M of Machine Room, so, the airborne moisture (steam) in this drier 30 absorption Machine Room M.Because in stopping, there is no agent 30 absorption that are dried of airborne moisture in the Machine Room M of discrepancy of air initiatively, so, can the absolute humidity in the M of Machine Room be suppressed littlely, in the Machine Room M of the outdoor unit 2 during running stops, being maintained at the state that humidity is little.

For this reason, although be micro-combustion level but be that the R32 of combustible refrigerant is from the M internal leakage of refrigerant piping Zu23Xiang Machine Room just in case for example produce, at the cold-producing medium that is this leakage with respect to the concentration of air during the state in flammable area, if there is certain incendiary source, can cause that cold-producing medium is on fire, the state of affairs of burning.But, because become the airborne moisture in drier 30 absorption Machine Room M in the Machine Room M of the state in running stops, the state that absolute humidity is little, so, even become the cold-producing medium state of affairs on fire just in case become state as described above, also can its burning scale be suppressed littlely, security improves.

And, these outdoor unit 2 the most distinctive structures are, make to prepare for the leakage of the contingency of cold-producing medium and running stopped maintaining in the M of Zhong Machine Room the drier 30 of the state that absolute humidity is little and the Surface Contact of compressor 3 this point to be installed, its reason of explanation from here.

If outdoor unit 2 runnings, compressor 3 also becomes duty, because compressor 3 is high pressure hull shape formula, in closed container, become the refrigerant gas environment of the HTHP of portion of compressed mechanism compression, so, the heat of refrigerant gas of the high temperature of the closed container of steel plate system after by compression is transmitted, if the common state except just starting rear grade, present with from compressor 3 to the approaching high temperature of the temperature of discharging refrigerant gas of discharging the high temperature that pipe arrangement 12 discharges.

For this reason, the surperficial drier 30 of pressing and be fixed on the cylindrical container 3b that forms this closed container by bandage 40 is in the running of outdoor unit 2, and the cylindrical container 3b of the high temperature of the compressor 3 from work provides heat, is heated.The such desiccant material of silica gel has can be by being heated to discharge adsorbed moisture, again as the play a role character of (moisture in absorbed air) of desiccant material.Thus, this drier 30 is heated by the cylindrical container 3b of compressor 3 in the running of outdoor unit 2, being emitted on running and stopping the airborne moisture in the Machine Room M of middle absorption.The airborne moisture that drier 30 stops the running at outdoor unit 2 in the Machine Room M of middle absorption is heated by compressor 3 in the running, again to Machine Room M, discharges.

Its result is, although the moisture of agent 30 absorption that are dried as steam, again in the M of Machine Room, discharge,, in the work that is emitted on compressor 3 of this moisture, i.e. in outdoor unit 2 runnings, carry out.And on-stream in the M of ， Machine Room, by the rotation of outdoor Air Blast fan 8, produce the cooling-air stream of the electric product unit 24 shown in the Fig. 5 illustrating above.For this reason, becoming steam is obtained by these cooling-air streams from the moisture of drier 30 discharges, rotation by outdoor Air Blast fan 8 is transported to the F of fan room, and by outdoor heat converter 5 and carried out being discharged from blow-off outlet 21Xiang room together with the air of heat exchange, to atmosphere, is discharged.

Owing to there being the cooling-air stream of electric product unit 24 in the M of Machine Room, so, in the running of outdoor unit 2, by compressor 3, heat and can not be trapped in Machine Room M from the moisture (steam) of drier 30 discharges, but gradually from the blow-off outlet 21 whereabouts rooms of the F of fan room.Thus, although on-stream from drier 30 discharge moisture, do not exist the moisture due to this discharge to make Machine Room M be changed to the situation of the state that absolute humidity is large.

Like this, because drier 30 is heated by the closed container of the high temperature of the compressor 3 in work in the running of outdoor unit 2, the moisture discharge of middle absorption will be stopped in running, so, when outdoor unit 2 becomes halted state again, the function of adsorption moisture is reproduced, and again adsorbs this and stops the airborne moisture (steam) in the M of Zhong Machine Room, by stopping, in the M of Zhong Machine Room, is again maintained the state that absolute humidity is little.

Drier 30 can carry out stopping middle adsorption moisture in the running of outdoor unit 2 repeatedly, and on-stream (in compressor 3 work) discharge the moisture (moisture of discharge discharges outside room by the rotation of outdoor Air Blast fan 8) of this absorption.Even if drier 30 is because the moisture that stops middle absorption in the running because of outdoor unit 2 makes its moisture absorption capacity state that reaches capacity, also in the running of outdoor unit 2, make the regeneration of moisture absorption capacity, return to the state that can recycle, so, can be when running stops, always adsorb the airborne moisture in the M of Machine Room, running can be stopped maintaining the state that absolute humidity is little in the M of Zhong Machine Room.

Like this, in order to make, stopping middle drier 30 regeneration of having adsorbed moisture, to can utilize in the running the heat radiation of compressor 3, to make moisture discharge, when stopping, always carrying out the absorption of moisture, with the Surface Contact of the compressor 3 of high pressure shell side formula drier 30 is installed.And, owing to utilizing heat radiation from compressor 3 as in the running at outdoor unit 2, by the moisture discharge of drier 30 absorption and by the thermal source of drier 30 heating, so, dry (discharge of moisture) of drier 30 do not used the electric power of air conditioner 100, but effectively utilizes wasted energy.

In the running of outdoor unit 2, by the heat extraction heating of compressor 3 and from the moisture (steam) of drier 30 discharges as explained above, by the rotation of outdoor Air Blast fan 8, with together with the cooling-air stream of electric product unit 24 through the F of fan room, from the blow-off outlet 21Xiang room of fan room's front panel 15, discharge, can not be deposited in the M of Machine Room.In addition, because just in case the combustible refrigerant leaking in the M of Machine Room is also on-stream by the rotation of outdoor Air Blast fan 8, together with flowing with the cooling-air of electric product unit 24, through the F of fan room, from blow-off outlet 21Xiang room, discharge, in atmosphere, spread, so, refrigerant gas concentration is extremely low, can not become flammable area.

In addition, in Fig. 5, in the running of outdoor unit 2, the rotation Er Cong Machine Room M by outdoor Air Blast fan 8 only exists the cooling-air of electric product unit 24 to flow to the mobile air stream of the F of fan room.But, for example as shown in Figure 6, also can on demarcation strip 20, form the air vent 50 of different other of the intercommunicating pore 29 that passes through from the cooling-air stream of electric product unit 24, make cooling-air stream from electric product unit 24 different from Machine Room M to the mobile air stream of the F of fan room and deposit.

Here, will to the mobile air stream of the F of fan room, be called secondary air stream through this air vent 50Cong Machine Room M.Also can be to obtain the on-stream moisture that heats and discharge from drier 30 by compressor 3 by this pair air stream, through the air vent 50Cong Machine Room M whereabouts F of fan room, and, make it, by outdoor Air Blast fan 8, from blow-off outlet 21Xiang room, to discharge.For this reason, the position of the above-below direction of air vent 50 become with drier 30 be in a ratio of top, with electric product unit 24 be in a ratio of below position.The air flowing out as the secondary air stream ，Xiang F of fan room is also same with the cooling-air stream of electric product unit 24, is the air stream through the export-oriented Machine Room M importing in air entry 19Bei Cong room of side panel 16 bottoms.

In running, certainly make from the moisture of drier 30 evaporation be introduced into the cooling-air stream of electric product unit 24 and above-mentioned secondary air stream the two, from Machine Room M, to the F of fan room, send, but, also can take and send as main together with cooling-air stream, also can take and send as main together with secondary air stream.In the situation that being the latter, preferably make the position of the fore-and-aft direction in indoor unit 2 of air vent 50 identical with the fore-and-aft direction position of drier 30.In addition, just in case the cold-producing medium leaking in the M of Machine Room is also together with the on-stream rotation by outdoor Air Blast fan 8 is not only flowed with the cooling-air of electric product unit 24, also from the air vent 50Jing F of fan room, from blow-off outlet 21Xiang room, discharge together with this pair air stream, in atmosphere, spread.

Just in case in the situation that outdoor unit 2 running does not have refrigrant leakage in the mobile Machine Room M of air substantially in stopping, due to the HFC refrigerant gas leaking and air, to compare mean molecule quantity large, larger than 1 with respect to the proportion of air, so, the bottom side of ， Machine Room M of declining in the M of Machine Room is detained.And, because compressor 3 is weight things, so, be arranged on the bottom of Machine Room M.For this reason, drier 30 is arranged on to compressor 3 and can accesses effect as follows: not only utilize in the running the heat radiation from compressor 3, make moisture discharge, also make leakage of refrigerant easily be detained, that is become to the lower space dynamic role of the Machine Room M of the possibility that, makes to exist refrigerant gas concentration to become flammable area the state that absolute humidity is little.

Have again, because leakage of refrigerant is trapped in the bottom side that stops Zhong Machine Room M, so the drier 30 position of preferably installing contiguously with compressor 3 is the bottom being as much as possible at the compressor cylindraceous 3 of above-below direction lengthwise.

In addition, as in the running, for making the heating source of the moisture discharge of drier 30, also can consider to utilize the heat of the discharge pipe arrangement 12 of the refrigerant gas of mobile HTHP of discharging from compressor 3 in pipe.But discharging pipe arrangement 12 is tubule, for example, be external diameter φ 13mm left and right here, and, there are a plurality of crooked positions.For this reason, although drier 30 can be arranged on to the surface of discharging pipe arrangement 12,, because of discharge the surface area of pipe arrangement 12 little, be difficult to press and be fixed on the such reason of crooked position, the amount of the drier 30 being mounted is limited less, can be few at the amount of moisture that stops middle absorption, be difficult to effectively.

Therefore, if want, make the amount of installation of drier 30 many, and reel thicklyer on discharge pipe arrangement 12, there is the restriction in M Nei space, Machine Room, and, moreover, from discharging pipe arrangement 12, leave more diametrically, the heat of discharging pipe arrangement 12 in running is more difficult to transmit, and does not carry out enough heating, the possibility that generation can not be discharged the moisture that stops middle absorption reliably.

But, in the compressor 3 of high pressure shell side formula, there is the on-stream large closed container of surface area that becomes high temperature, can contact with the outer surface of this closed container, and drier 30 to be installed than discharging the area that pipe arrangement 12 is large.Because can the erection space of drier 30 be guaranteed greatly, so, also there is no need drier 30 to be configured thick, on-streamly can be fully to drier 30, transmit the heat of compressors 3, by drier 30 heating.

Thus, drier 30 can be maintained the state that absolute humidity is little at the airborne moisture ，Jiang Machine Room M that stops the amount that middle absorption is enough of outdoor unit 2, can improve the security for the leakage of the contingency of cold-producing medium.And, in the running, by heating fully from the heat radiation of compressor 3, by the moisture discharge of absorption, adsorption capacity is reproduced reliably, follow stop time, can again adsorb the moisture of enough amounts, Machine Room M can be maintained to the state that absolute humidity is little.Can repeatedly carry out this circulation.

In addition, the silica gel of drier 30 shown in being not limited to hereto, if can carry out the absorption of moisture, the material that can the moisture of absorption be discharged and be regenerated by heating, also can be such as other the drier such as the such synthetic zeolite of molecular sieve, a plurality of drier can also be mixed and use.

In addition, drier 30 to the installation of compressor 3 as shown in Figure 3, the metal bandage 40 that employing consists of helical spring is bundled in the cylindrical container 3b of compressor 3, method by from drier 30 to the surface pushing of cylindrical container 3b, but, can be also other method, for the method for using bandage 40 other fixed part to be in addition fixed, start from here, according to Fig. 7 to Figure 11, describe.

Fig. 7 means that the drier that undertaken by the fixed part different from bandage 40 is to the fixing schematic diagram of compressor 3, and Fig. 8 is the longitudinal section as the signal of pocket 41 peripheries of the fixed part shown in Fig. 7.This is on the surface of the cylindrical container 3b of compressor 3, to pass through the pocket 41 of welding or soldering fixing metal system, in this pocket 41, takes in drier 30, and the method for drier 30 is installed.

Pocket 41 as shown in Figure 7, is constituted as and makes its degree of depth dark in the both end sides of the circumferencial direction of compressor 3, shallow at middle body.And, as shown in Figure 8, the distance A of the inwall of pocket 41 and the cylindrical container 3b of compressor 3 (being the distance radially of cylindrical container 3b) is made to drier 30 and contact such size with cylindrical container 3b.Thus, can increase the area that exposes of the drier 30Xiang Machine Room M that is accommodated in pocket 41, and the Surface Contact of the cylindrical container 3b of drier 30 and compressor 3, drier 30 can stop in the running of outdoor unit 2 the airborne moisture in middle absorption Machine Room M, the on-stream heat by the closed container discharge from compressor 3 heats, by stopping the moisture discharge of middle absorption, make the regeneration of water adsorption ability.

In addition, as shown in Figure 9, as the fixed part of drier 30, also can make metal net at least one party to opening (here by upper opening), by welding, soldering is fixed on cylindrical container 3b, and netted pocket 42 is set.This netted pocket 42 can be guaranteed the aeration to drier 30 fully.And, by the size of pocket 42 is formed greatlyr than the size of drier 30, can make reliably the Surface Contact of drier 30 and cylindrical container 3b.

Figure 10 means that the drier 30 that undertaken by also different from Fig. 7 fixed parts is to the fixing schematic diagram of compressor 3, and Figure 11 is the sectional elevation as the signal of retainer 43 peripheries of the fixed part shown in Figure 10.This is distolateral by the length direction one of welding or the fixing retainer 43 as elongated metallic plate of soldering on the cylindrical container 3b of compressor 3, by another distolateral free end of making, utilize the elastic force (spring force of leaf spring) of retainer 43, the method for drier 30 being installed by retainer 43 and cylindrical container 3b clamping.

As shown in figure 11, the opening that slightly promotes retainer 43 is distolateral, drier 30 is sandwiched to the downside of retainer 43, utilizes the spring force of retainer 43 that drier 30 is pushed to cylindrical container 3b.Here, as shown in figure 10, the upper and lower end parts of drier 30 is fixing by take the retainer 43 that the Zhou Fangxiang of cylindrical container 3b is length direction respectively.In addition, the Zhou Fangxiang of the cylindrical container 3b that yet can be mounted at retainer 43 does not make the elongated lengthwise of retainer 43, but for example, makes the elongated lengthwise of retainer 43 at the above-below direction of compressor 3.

In addition, the radical of retainer 43 is two here, is clamped respectively the both end sides of drier 30 by these retainers 43, and still, its radical is as long as set aptly according to the size of drier 30 (with the contact area of cylindrical container 3b).And, although the length of the length direction of retainer 43, in Figure 10, Figure 11, has the length such over drier 30,, if can, by the fixing length of drier 30, can be also the length that is no more than drier 30.

Retainer 43 is set for radical, length direction length and width length (width) as following aptly: because retainer 43 hinders the area of the drier 30 exposing as far as possible little, and can be because of the cylindrical container 3b wide region of retainer 43 and compressor 3 fixing drier 30 contiguously.

Retainer 43 also can be formed make fixing distolateral be one, be branched off into a plurality ofly on the way, there are a plurality of open ends.In addition, also can open distolateral end to the direction warpage of cylindrical container 3b, the drier 30 after restriction is fixing to fixing distolateral rightabout movement.

In addition, so far, the mode of joining with the lateral surface of the cylindrical container 3b with at the long compressor 3 of above-below direction is drier 30 fixedly.Figure 12 means other the schematic diagram of installation site of drier 30, is in the closed container of compressor 3, and the figure of drier 30 is installed at the upper surface of upper cover 3a.In this case, because of the band fixedly difficulty of carrying out of serving as reasons, so, retainer 43 or pocket 41, netted pocket 42 are arranged on to the upper surface of upper cover 3a, drier 30 is fixing.

As previously outlined, because refrigerant gas is heavier than air, so, just in case when stopping, in the situation that do not have to produce refrigrant leakage in the Machine Room M of discrepancy of air initiatively, because leakage of refrigerant gas is trapped in the bottom of Machine Room M, therefore, for the absolute humidity of bottom as much as possible that can Shi Gai Machine Room M little, and drier 30 can be fixed on as far as possible to the lower side of compressor 3, but, by being arranged on the upper surface of upper cover 3a, by upper cover 3a supporting role in the gravity of drier 30, can utilize the gravity of drier 30, make drier 30 contact reliably the surface of compressor 3, therefore, there is fixing easily such advantage of drier 30.

Because the retainer 43 arranging in order to carry out the fixing of drier 30 at the upper surface of upper cover 3a or pocket 41, netted pocket 42, than drier 30 is pushed to such use to compressor 3 reliably, the movement of restriction drier 30 is main purposes, so, compare with the situation that is arranged on the lateral surface of cylindrical container 3b, can relax size management etc.

In addition, hereto, the compressor 3 high pressure shell side formula that to be closed container inside be full of by the refrigerant gas of the HTHP of portion of compressed mechanism compression.This is because for by drier 30 heating and make its functional regeneration, is necessary to make as the closed container surface of the high temperature of its heating source wide.But, even the compressor of low pressure shell side formula also has compressor as follows: the part in closed container inside is set to the space of the refrigerant gas environment of the HTHP that portion of compressed mechanism compressed.For example, in the screw compressor illustrating above, there is the compressor of low pressure shell side formula described below: in closed container, compressor means portion is configured in to top, motor part is configured in to bottom, they become the environment of the suction cold-producing medium of the low pressure sucking to compressor.

In the screw compressor of such low pressure shell side formula, also there is the screw compressor that the superjacent air space of the compression mechanical part in closed container is used as to portion of the compressed mechanism of wish compression and is full of by the refrigerant gas of HTHP to the silencer space ，Gai space of discharging the refrigerant gas that pipe arrangement 12 discharges.In the compressor of such low pressure shell side formula, the closed container position in the space being full of by such discharging refrigerant gas is high temperature.Need only the surface at the closed container at such position, for example in above-mentioned, for covering the upper cover upper surface of silencer space, drier 30 is installed, using the heat radiation from running Shi Gai position as heating source, make moisture (running stops the moisture of the middle absorption) evaporation of drier 30.

In addition, hereto, drier 30 packs into and has the metal-made of aeration or the mesh bag of heat stable resin system forms being shaped as granular desiccant material (being silica gel) here, still, if will not be granular, but be shaped as desiccant material fibrous, sheet, be accommodated in mesh bag, mutually be wound around or be hooked on mesh, from mesh bag deviate to be inhibited, so, the size with the mesh that increases mesh bag, improves to the effect of the aeration of the dry matter being contained.In addition, by stable on heating ester moulding mesh bag in the situation that, the refrigerant gas that leaks of wishing to prepare for the worst on fire and there is flame retardancy.

In addition, Figure 13 and Figure 14 are the figure of the different drier of the drier 30 that forms from being accommodated in mesh bag of description architecture.Drier 31 shown in Figure 13 is directly desiccant material to be configured as to the drier of the structure of necessary shape, size.This drier 31 is the drier of lateral surface that are installed in the cylindrical container 3b of compressor 3, inner wall surface thereof,, the face contacting with the lateral surface of cylindrical container 3b, by the curve generating of the such radius of the lateral surface along cylindrical container 3b, is guaranteed the contact area with cylindrical container 3b effectively.

The drier 31 that desiccant material is installation shape by direct forming is due to the mesh bag of using in the drier 30 not needing above, so, except bandage 40, pocket 41 etc. are at the outer surface of compressor 3 fixedly the fixed part of drier 31, do not hinder the object of the aeration of drier 31, have advantages of with the aeration of Machine Room M more excellent such.

In addition, the drier shown in Figure 14 32 be by with for the mesh bag of drier 30, compare the metal-made that mesh is thin or there is the drier of pasting the desiccant material such as silica gel on the mesh parts of stable on heating resin, cloth shape.Can on the surface of cloth shape mesh parts, directly paste pulverous desiccant material or be shaped as granular, fibrous desiccant material, also can be in desiccant material hybrid junctions mixture (adhesive), make it chemistry and be attached on mesh parts, that is, also can be configured to and make mesh parts carrying desiccant material.

Because drier 32 is cloth shape, so, can be coiled on the cylindrical container 3b of compressor 3 and install, have advantages of and can guarantee to expose area and all wide with the contact area of cylindrical container 3b of face that becomes the contrary side of this face exposing to Machine Room M.Can by drier 32 the lateral surface of cylindrical container 3b along its week steering wheel around, fixing from it by bandage 40, also can form respectively at the Zhou Fangxiang two ends of drier 32 clamps such as hook of mutual hook, drier 32 is coiled in to the lateral surface of cylindrical container 3b, by clamp hook, utilize the elastic force of mesh parts to be fixed.

Certainly, drier 32 can be also not increase its surface area before cylindrical container 3b coiling, but same with the drier 30 of having taken in desiccant material in mesh bag, is fixed on the lateral surface of the cylindrical container 3b of compressor 3, the upper surface of upper cover 3a.Now, owing to drier 32 can also being fixed with the state of folding multilayer, so, the size management that can relax pocket 41 fixed parts such as grade.

In this air conditioner 100, as cold-producing medium, use low GWP but there is flammable HFC cold-producing medium R32, this R32 from nearest combustible research, evaluate, have at the refrigerant concentration with respect to air in flammable area, the large environment of absolute humidity, the tendency that burning scale is larger.For this reason, in this outdoor unit 2, make drier 30～32(represent at least any one such meaning of drier 30, drier 31, drier 32, the closed container outer surface that becomes high temperature in compressor 3 work exposing in the M of M Nei，Qie Yu Machine Room, Machine Room too later) is installed contiguously.

For this reason, because in the running of outdoor unit 2 stops, airborne moisture in drier 30～32 absorption Machine Room M, can will in the M of Machine Room, be maintained in the state that absolute humidity is little, so, even produce refrigrant leakage in contingency in the M of Machine Room, the concentration of the cold-producing medium leaking is when flammable area, because certain incendiary source makes leakage of refrigerant on fire, also can its burning scale be suppressed littlely, can improve the security for the leakage of the contingency of cold-producing medium.

And, when the running of outdoor unit 2, by the heat radiation heating of closed container and the drier 30～32 of closed container Surface Contact of the compressor 3 from work, be emitted on the moisture that running stops middle absorption.Accordingly, drier 30～32 makes the adsorption function regeneration of moisture, can when stop next time, again adsorb the airborne moisture in the M of Machine Room.

The on-stream moisture that is heated and become steam by the heat of compressor 3 and again discharge from drier 30～32Xiang Machine Room M is imported into Machine Room M by being arranged on the rotation of the outdoor Air Blast fan 8 F of fan room from room, by be configured in the electric product unit 24 on M top, Machine Room interior after, be directed to the F of fan room, at outdoor Air Blast fan 8, pass through, be introduced into cooling-air stream or the secondary air stream of the electric product unit 24 blowing out from blow-off outlet 21Xiang room above, discharge from blow-off outlet 21 to atmosphere with together with such air stream, therefore, do not exist and be deposited in the M of Machine Room, make the large situation of absolute humidity of Machine Room M.

Just in case stop the HFC refrigerant gas (here for R32) of Zhong Machine Room M internal leakage in running due to density ratio air large (weight), so, near the bottom of Machine Room M that stops middle discrepancy that wanting to be trapped in the air that there is no active.Because compressor 3 is weight thing, be placed in base plate 17 upper surfaces of the framework of outdoor unit 2, be configured in the bottom of Machine Room M, so the drier 30～32 that is fixed in compressor 3 with contact condition is positioned at the bottom of Machine Room M.For this reason because the lower space entity of the Machine Room M that drier 30～32 is easily detained leakage of refrigerant be maintained in the state that absolute humidity is little, so, improved the security for the leakage of the contingency of cold-producing medium.In addition, even there is leakage of refrigerant because on-stream in the M of Machine Room, the refrigerant gas leaking is also with same from the steam of drier 30～32 discharges, together with flowing with the cooling-air of electric product unit 24, to atmosphere, discharged, by extensive diffusive, so refrigerant gas concentration can not become flammable area.

In addition, because compressor 3 has the lateral surface of cylindrical container 3b, the upper surface of upper cover 3a etc. become the large-area closed container surface of high temperature at work, so, install and compare the Surface Contact of the discharge pipe arrangement 12 mobile with the refrigerant gas of high temperature with making drier 30～32, the drier 30～32 with large area can be installed.For this reason, because the drier 30～32Shi Xiang Machine Room M that install expose area and large to the contact area of heating source (compressor 3), so, can in stopping, adsorbing in a large number the airborne moisture in the M of Machine Room, the absolute humidity of Machine Room M is maintained littlely, on-stream, can be heated by the heat of compressor 3, a large amount of moisture that discharge is adsorbed reliably, by water adsorption functional regeneration.

Here, use R32 as low GWP but there is flammable HFC cold-producing medium, but, the relation tendency identical with R32 also as the HFO cold-producing mediums such as HFO-1234yf (HFC cold-producing medium a kind of) of halogenated hydrocarbons in composition with two keys of carbon with absolute humidity and burning scale, in addition, because same with R32, density ratio air is large, so, using this HFO cold-producing medium as in the situation that the cold-producing medium circulating in refrigerant loop, or in the situation that use the mix refrigerant of R32 and HFO cold-producing medium, by application the present invention, also can access the effect identical with the situation of using R32.

In addition, even if drier 30～32 directly contact with the outer surface of the closed container of compressor 3, as long as thermo-contact so that from the heat radiation of compressor 3 to drier 30～32 transmission, this heat becomes heating source, the moisture adsorbing can be discharged.For example, also can between compressor 3 and drier 30～32, clamp the metal parts being formed by the large metal material of pyroconductivity, the heat of compressor 3 is transmitted to drier 30～32, heat.

In addition, owing to considering the reduction of the moisture absorption capacity (water adsorption ability) that drier 30～32 causes because degenerating year in year out, so, wishing that drier 30～32 is equipped to can regularly replace, in the situation that be arranged on the lateral surface of the cylindrical container 3b of compressor 3, preferred disposition is in the front face side ，Ji Machine Room of compressor 3 front panel 15 sides.If the bandage shown in above-mentioned 40, retainer 43, as long as make its elastic force discharge for the time being and again pay, also have, if pocket 41, netted pocket 42, by simple taking-up, put into, just can not will compressor 3 from Machine Room M, take out the mounting or dismounting of carrying out drier 30～32, can carry out easily the replacing operation of new and old drier 30～32.

Hereto, as embodiments of the present invention, outdoor unit 2 by air conditioner 100 is illustrated, but, if possess compressor (this compressor has the closed container that at least a portion at work becomes high temperature) in inside, possesses setting outdoor unit without, use R32 or HFO cold-producing medium or their mix refrigerant as the refrigerating circulatory device of the cold-producing medium circulating in refrigerant loop, even if be not air conditioner 100, it is for example heat-pump hot water supply apparatus, other the refrigerating circulatory device such as refrigerator, also can apply the present invention, can access same action effect, can improve the security for the leakage of the contingency of cold-producing medium.

Claims (12)

1. a refrigerating circulatory device, possesses: refrigerant loop; Compressor, it has compression mechanical part in closed container inside in above-mentioned refrigerant loop, and refrigerant compression discharge are made it to circulate in above-mentioned refrigerant loop; Outdoor unit, it is placed without, and framework inside be separated plate be divided into have outdoor Air Blast fan and outdoor heat converter fan room and configuration above-mentioned compressor Machine Room, above-mentioned cold-producing medium is to have flammable HFC cold-producing medium, it is characterized in that,

This refrigerating circulatory device possesses drier, the surface heat of described drier and above-mentioned closed container is mounted contiguously, in the work of above-mentioned compressor, the temperature of above-mentioned closed container raises by the refrigerant gas having been compressed by above-mentioned compressor structure portion, and in the running of above-mentioned outdoor unit stops, above-mentioned drier adsorbs the airborne moisture in above-mentioned Machine Room.

2. refrigerating circulatory device as claimed in claim 1, is characterized in that, above-mentioned compressor is arranged on the bottom of above-mentioned Machine Room.

3. refrigerating circulatory device as claimed in claim 1, is characterized in that, when above-mentioned outdoor unit running, above-mentioned drier is heated by the closed container of the high temperature of the above-mentioned compressor in working, and is emitted on the moisture that above-mentioned outdoor unit running stops middle absorption.

4. refrigerating circulatory device as claimed in claim 2, is characterized in that, when above-mentioned outdoor unit running, above-mentioned drier is heated by the closed container of the high temperature of the above-mentioned compressor in working, and is emitted on the moisture that above-mentioned outdoor unit running stops middle absorption.

5. refrigerating circulatory device as claimed in claim 3, is characterized in that, possesses: be formed on the air entry being communicated with above-mentioned Machine Room outside above-mentioned framework Shang Qiejiang room; The blow-off outlet blowing out outside the air flow room that is formed on opposite to each other in above-mentioned framework with above-mentioned outdoor Air Blast fan and the rotation by above-mentioned outdoor Air Blast fan is produced, when above-mentioned outdoor unit running, rotation by above-mentioned outdoor Air Blast fan produces air stream, through above-mentioned air entry, from room, export-oriented above-mentioned Machine Room imports this air stream, from above-mentioned Machine Room, be directed to said fans chamber, and blow out from above-mentioned blow-off outlet, when above-mentioned outdoor unit running, from the moisture of above-mentioned drier discharge, from above-mentioned blow-off outlet, to room, discharge together with above-mentioned air stream.

6. refrigerating circulatory device as claimed in claim 4, is characterized in that, possesses: be formed on the air entry being communicated with above-mentioned Machine Room outside above-mentioned framework Shang Qiejiang room; The blow-off outlet blowing out outside the air flow room that is formed on opposite to each other in above-mentioned framework with above-mentioned outdoor Air Blast fan and the rotation by above-mentioned outdoor Air Blast fan is produced, when above-mentioned outdoor unit running, rotation by above-mentioned outdoor Air Blast fan produces air stream, through above-mentioned air entry, from room, export-oriented above-mentioned Machine Room imports this air stream, from above-mentioned Machine Room, be directed to said fans chamber, and blow out from above-mentioned blow-off outlet, when above-mentioned outdoor unit running, from the moisture of above-mentioned drier discharge, from above-mentioned blow-off outlet, to room, discharge together with above-mentioned air stream.

7. refrigerating circulatory device as claimed in claim 3, is characterized in that, possesses: be configured in the top of comparing with above-mentioned compressor of above-mentioned Machine Room and have the electric product unit of Denso substrate, be formed on the air entry being communicated with above-mentioned Machine Room outside above-mentioned framework Shang Qiejiang room, the blow-off outlet blowing out outside the air flow room that is formed on opposite to each other in above-mentioned framework with above-mentioned outdoor Air Blast fan and the rotation by above-mentioned outdoor Air Blast fan is produced, in above-mentioned outdoor unit running, by the rotation of above-mentioned outdoor Air Blast fan, produce the cooling-air stream of electric product unit, the cooling-air stream of this electric product unit is imported in above-mentioned Machine Room through above-mentioned air entry from room, after passing through in above-mentioned electric product unit, be directed to said fans chamber, and blow out from above-mentioned blow-off outlet, when above-mentioned outdoor unit running, the moisture discharging from above-mentioned drier is together with above-mentioned cooling-air stream, from above-mentioned blow-off outlet, to room, discharge.

8. refrigerating circulatory device as claimed in claim 4, is characterized in that, possesses: be configured in the top of comparing with above-mentioned compressor of above-mentioned Machine Room and have the electric product unit of Denso substrate, be formed on the air entry being communicated with above-mentioned Machine Room outside above-mentioned framework Shang Qiejiang room, the blow-off outlet blowing out outside the air flow room that is formed on opposite to each other in above-mentioned framework with above-mentioned outdoor Air Blast fan and the rotation by above-mentioned outdoor Air Blast fan is produced, in above-mentioned outdoor unit running, by the rotation of above-mentioned outdoor Air Blast fan, produce the cooling-air stream of electric product unit, the cooling-air stream of this electric product unit is imported in above-mentioned Machine Room through above-mentioned air entry from room, after passing through in above-mentioned electric product unit, be directed to said fans chamber, and blow out from above-mentioned blow-off outlet, when above-mentioned outdoor unit running, the moisture discharging from above-mentioned drier is together with above-mentioned cooling-air stream, from above-mentioned blow-off outlet, to room, discharge.

9. the refrigerating circulatory device as described in any one in claim 1 to 8, it is characterized in that, above-mentioned compressor is the high pressure shell side formula of the inner refrigerant gas environment for the HTHP that compressed by above-mentioned compressor structure portion of above-mentioned closed container, and above-mentioned drier is mounted contiguously with the lateral surface that forms the cylindrical container of above-mentioned closed container.

10. the refrigerating circulatory device as described in any one in claim 1 to 8, is characterized in that, above-mentioned drier is mounted contiguously with the upper surface that forms the upper cover of above-mentioned closed container, and the gravity that acts on above-mentioned drier is supported by above-mentioned upper cover.

11. refrigerating circulatory devices as described in any one in claim 1 to 8, is characterized in that, above-mentioned drier is in having the metal-made of aeration or having stable on heating resinous mesh bag, take in desiccant material and form.

12. refrigerating circulatory devices as claimed in claim 9, is characterized in that, above-mentioned drier is bundled by the bandage being looped around in above-mentioned cylindrical container, install contiguously with the lateral surface of above-mentioned cylindrical container.

Images