CN109154445A

CN109154445A - The indoor unit of air conditioner

Info

Publication number: CN109154445A
Application number: CN201780011595.2A
Authority: CN
Inventors: 熊本光佑; 田中幸范; 粟野真和; 吉田和正; 能登谷义明
Original assignee: Hitachi Johnson Controls Air Conditioning Inc
Current assignee: Hitachi Johnson Controls Air Conditioning Inc
Priority date: 2017-04-28
Filing date: 2017-10-03
Publication date: 2019-01-04
Anticipated expiration: 2037-10-03
Also published as: EP3438559A1; JP2018189271A; WO2018198400A1; CN109154445B; TWI644063B; EP3438559A4; EP3438559B1; JP6340111B1; MY173637A; TW201839330A

Abstract

The main purpose of the present invention is to provide when freezing cleaning water will not escape to the indoor unit of external air conditioner.The control unit for freezing operating on the surface that there is the indoor unit (2) of air conditioner the heat exchanger (16) that heat exchange is carried out between air and refrigerant, the drain pan (17) for receiving the drain water to drip from heat exchanger (16) and control frost or ice to be made to be attached to heat exchanger.The volume of drain pan (17) is to freeze to be attached to the frost of heat exchanger (16) or total adhesion amount of ice or more when operating.In view of drain water is discharged to by drainpipe the situation of the outside of indoor unit (2), the indoor unit (2) is preferably configured to, and the volume of drain pan (17) is [shorter time in time needed for the defrosting of the displacement × whole frost or ice of the drainpipe of total adhesion amount-of frost or ice per unit time and required time until whole frost or subglacial drop down onto above-mentioned drain pan] or more.

Description

The indoor unit of air conditioner

Technical field

The present invention relates to the indoor units of air conditioner.

Background technique

Room air is sucked inside by the indoor unit of air conditioner, is made the room air of sucking by heat exchanger, is obtained reality Heating, cooling and any of them processing of dehumidifying adjusting air have been applied, has been blown out by the adjusting air that will be obtained to room It is interior, thus to indoor carry out air conditioning.

The indoor unit of air conditioner is that the dust for containing room air does not invade inside, will suck the sky of room air The mode the configurating filtered device blocked between aspiration entrance and heat exchanger, utilizes the major part of filter traps dust.But than The fine dust of the mesh of filter is hidden in the inside of the mesh intrusion indoor unit of filter.

The inside of machine indoors, friction when being collided due to the room air and heat exchanger of sucking, in heat exchanger Surrounding generates electrostatic.In addition, the fine dust the case where containing oil for invading the inside of indoor unit, is more.Therefore, it invades The dust of the inside of indoor unit is attached to heat exchanger because of electrostatic, oil.

The dust for being attached to heat exchanger contains the ingredient of the nutrient as miscellaneous bacteria (including mould class).Then, such as in the summer If air conditioner carries out refrigeration operation, dehumidifying operating when season, the fin due to the moisture in air in heat exchanger condenses, heat Become high humidity state around exchanger.Therefore, if dust continues to be attached to heat exchanger, there are miscellaneous bacteria (including mould classes) The case where breeding and generating stench.Therefore, it is desirable to which air conditioner removal is attached to the dust of heat exchanger, heat was all kept by 1 year Exchanger cleaning.

Thus, for example, propose a kind of air conditioner in patent document 1, carried out after heating operation refrigeration operation or Dehumidifying operating, thus make water be attached to heat exchanger fin surface, make containing for the surface for being attached to fin with the water of attachment There is the dust of oil to wander.But air conditioner described in Patent Document 1 is in order to make dust stream with the water on the surface for being attached to fin It falls, needs to implement antifouling process to the surface of fin.

Thus, for example, studying following technology: reduce the operating of the temperature of heat exchanger, frost or ice is made to be attached to wing Then the surface of piece carries out the operating for improving the temperature of heat exchanger, by frost or ice thaw, utilize falling after defrosting under water The impetus wanders the dust for being attached to heat exchanger.Hereinafter, the processing of such cleaning heat exchanger is known as " freezing to clean ".It should The water on the surface than being attached to fin per unit time under common refrigeration operation or dehumidifying operating can be made by freezing cleaning More a large amount of frosts is attached to the surface of fin (including ice).Therefore, if this freezes to clean, even if then not to the surface of fin Implement antifouling process, also the dust for being attached to heat exchanger can be made to wander.

Existing technical literature

Patent document

Patent document 1: Japanese Unexamined Patent Publication 2008-138913 bulletin

Summary of the invention

Problems to be solved by the invention

But in freezing cleaning, generate than being generated per unit time in the case where common refrigeration operation or dehumidifying operate A large amount of water (drain water) more than water.It is expected that a large amount of water (drain water) will not be leaked to the outer of indoor unit by air conditioner Portion.

The present invention is made in order to solve above-mentioned problem, and main purpose, which is to provide when one kind freezes cleaning, to incite somebody to action Water escapes to the indoor unit of external air conditioner.

Solution for solving the problem

To achieve the goals above, the present invention is made into a kind of indoor unit of air conditioner comprising: in air The heat exchanger of heat exchange is carried out between refrigerant；Receive the drain pan of the drain water to drip from above-mentioned heat exchanger；And The control unit for freezing operating on the surface for making frost or ice be attached to above-mentioned heat exchanger is controlled, the volume of above-mentioned drain pan is above-mentioned Freeze to be attached to the frost of above-mentioned heat exchanger or total adhesion amount of ice or more when operating.

Other schemes are described below.

Invention effect

In accordance with the invention it is possible to not make water escape to outside when freezing cleaning.

Detailed description of the invention

Fig. 1 is the structure chart of the air conditioner of embodiment 1.

Fig. 2 is the cross-sectional view of the indoor unit of the air conditioner of embodiment 1.

Fig. 3 is the perspective view of the drain pan sections for the cabinet that the indoor unit of embodiment 1 uses.

Fig. 4 is the partial enlarged view of the preceding drain pan of drain pan sections.

Fig. 5 is the surface area and the chart figure for the relationship for freezing the excretion water that cleaning generates for indicating heat exchanger.

Fig. 6 is the schematic diagram for indicating the arrangement of drainpipe of drain pan sections.

Fig. 7 is the schematic diagram for indicating the other arrangement of drainpipe of drain pan sections.

Fig. 8 is the schematic diagram for indicating the inlet configuration of drainpipe of drain pan sections.

Fig. 9 is the schematic diagram for indicating the other inlet configuration of drainpipe of drain pan sections.

Figure 10 A is the schematic diagram (1) of the drain pan sections of the cabinet of variation.

Figure 10 B is the schematic diagram (2) of the drain pan sections of the cabinet of variation.

Figure 10 C is the schematic diagram (3) of the drain pan sections of the cabinet of variation.

Figure 11 is the perspective view of the drain pan sections for the cabinet that the indoor unit of embodiment 2 uses.

Figure 12 is the partial enlarged view of the preceding drain pan of drain pan sections.

Figure 13 is the perspective view for the insulation that embodiment 2 uses.

Figure 14 is the partial enlarged view (1) of the Drainage Division of preceding drain pan.

Figure 15 is the partial enlarged view (2) of the Drainage Division of preceding drain pan.

Figure 16 is the schematic diagram for indicating the configuration relation of heat exchanger and preceding drain pan.

Figure 17 is the schematic diagram (1) of the insulation of variation.

Figure 18 is the schematic diagram (2) of the insulation of variation.

Figure 19 is the schematic diagram of the Drainage Division of the preceding drain pan of variation.

Specific embodiment

Hereinafter, being said in detail referring to attached drawing to embodiments of the present invention (hereinafter referred to as " present embodiment ") It is bright.In addition, each figure is only schematically illustrated with that can fully understand degree of the invention.Therefore, the present invention is not only It is defined in illustrated example.In addition, in the various figures, marking identical symbol for shared structural element, same structural element, saving Slightly their repeat description.

[embodiment 1]

The structure > of < air conditioner

Hereinafter, referring to FIG. 1 and FIG. 2, being illustrated to the structure of the air conditioner 1 of present embodiment 1.Fig. 1 is this embodiment party The structure chart of the air conditioner 1 of formula 1.Fig. 2 is the cross-sectional view of the indoor unit 2 of air conditioner 1.

It is configured at indoor indoor unit 2 as shown in Figure 1, air conditioner 1 has, is configured at outdoor outdoor unit 3 and configuration In the remote controler 12 neighbouring at hand of indoor user.

Room air is drawn into inside by indoor unit 2, and the room air of sucking is passed through heat exchanger 16 (referring to Fig. 2), The adjusting air for obtaining implementing heating, cooling and any of them processing of dehumidifying, is blown out to room for obtained adjusting air It is interior, thus to indoor carry out air conditioning.Indoor unit 2 is connect via connecting pipings 5 with outdoor unit 3, and between outdoor unit 3 Make refrigerant circulation.Outdoor unit 3 carries out heat exchange between the refrigerant of circulation.

Indoor unit 2 is provided with Air Blast fan 14 (referring to Fig. 2), heat exchanger 16 by cabinet 7 and adornment frame 8 (referring to Fig. 2) Equal tectosomes.Air Blast fan 14 is the axial-flow fan from 6 side of air suction inlet to 13 side of air blow-off outlet conveying air.Heat exchange Device 16 is the unit that heat exchange is carried out between refrigerant.

In example shown in Fig. 1, the front surface of adornment frame 8 is to have the upper portion vertically extended and lower lateral Shape of the rear ramp to the lower portion of extension.Front surface panel 9 is installed in the upper portion of the front surface of adornment frame 8.Before Surface panel 9 is the component for covering the front surface of indoor unit 2.It is connect in addition, being equipped in the lower portion of the front surface of adornment frame 8 Receipts portion 10, display unit 11 and up-down wind direction board 18.

Receiving unit 10 is the device for receiving the operation signal sent from remote controler 12.Receiving unit 10 and it is built in indoor unit 2 Control unit CL electrical connection.Control unit CL controls air-conditioning based on the operation signal received via receiving unit 10 from remote controler 12 The motion of machine 1.Display unit 11 is the device for showing operational situation.

Up-down wind direction board 18 is the component for providing the direction of up and down direction of the adjusting air to spue from air blow-off outlet 13. Up-down wind direction board 18 is configured to, and is pivotally supported in lower end in adornment frame 8 in such a way that upper portion is opened and closed in the up-down direction (or cabinet 7), and can not shown driving portion and rotate.Indoor unit 2 forms sky by opening up-down wind direction board 18 Air-blowing outlet 13.

As shown in Fig. 2, indoor unit 2 inside in addition to above-mentioned Air Blast fan 14, above-mentioned heat exchanger 16 and Outside above-mentioned up-down wind direction board 18, also there is filter 15, drain pan 17 and left and right wind direction plate 19.

Filter 15 is the component for preventing dust from invading to the inside of cabinet 7.Drain pan 17 is to receive to be condensed in heat exchange The surface of the fin 20 of device 16 and the component of water (drain water) fallen.Left and right wind direction plate 19 is that regulation is spat from air blow-off outlet 13 The component of the direction of the left and right directions of adjusting air out.

Filter 15 is configured between blocking air suction inlet 6 and heat exchanger 16.Air conditioner 1 is configured to, and uses filter 15 prevent the dust bigger than the mesh of filter 15 from invading the inside of cabinet 7, and using it is aftermentioned freeze to wash off pass through The small dust of the mesh of the ratio filter 15 of the mesh of filter 15.Air conditioner 1 is preferably configured as with filter cleaning Mechanism (not shown) automatically (it is further preferred that regularly) cleans filter 15 using filter sweeping mechanism.

Air Blast fan 14 is configured in a manner of it can suck air from air suction inlet 6 and blow out from air blow-off outlet 13 Near the substantial middle of the inside of indoor unit 2.The upstream side that heat exchanger 16 is configured at Air Blast fan 14 (is sucked close to air 6 sides of mouth), the shape of falling V is shaped generally as in a manner of covering the upstream side of Air Blast fan 14.

Heat exchanger 16 is made of front heat exchanger 16F and rear heat exchange 16R.Front heat exchanger 16F and rear heat exchange Device 16R has multiple fins (heat exchanger plate) 20 respectively and penetrates through multiple pipes 40 of each fin 20.Fin 20 is for freezing The lamellar component of the strip of heat exchange is carried out between agent and air.Fin 20 is for example made of aluminium alloy.Pipe 40 is for making The component of refrigerant flowing.

In this configuration, indoor unit 2 traps the major part for the dust being drawn into internal room air with filter 15. But a part of dust is not trapped by filter 15, is hidden in the inside of the mesh intrusion indoor unit 2 of filter 15, is attached to Heat exchanger 1.If dust continues to be attached to heat exchanger 16, generate stench there are miscellaneous bacteria (including mould class) breeding can It can property.Therefore, air conditioner 1 is preferably configured as the dust that removal is attached to heat exchanger 16.Therefore, in present embodiment, air-conditioning Machine 1 carries out cleaning treatment below to heat exchanger 16 by operating control.

That is, firstly, air conditioner 1 is acted as follows: reduce the operating of the temperature of heat exchanger 16, by heat exchanger 16 quick refrigerations make frost or ice be attached to the surface (hereinafter referred to as " frozen action ") of the fin 20 of heat exchanger 16.In this reality It applies in mode, the operating for carrying out frozen action is known as " freezing to operate ".

Furthermore, it is possible to think: in freezing operating, white (including ice) be and by water sublimed in air without The state of water droplet is attached directly to the surface of the fin 20 of heat exchanger 16.But it is also possible to be white (ice) through the air Moisture heat exchanger 16 fin 20 surface condense and the moisture of the condensation is freezed, so that the state by water droplet is attached In the surface of the fin 20 of heat exchanger 16 the case where.

In addition, different from common refrigeration operation, air conditioner 1 acts Air Blast fan 14 in freezing operating.By This, air conditioner 1 is able to suppress falling and (dripping) for the water (condensed water) for being condensed in the surface of fin 20 of heat exchanger 16, can Extend water (condensed water) in the residence time on the surface of fin 20.As a result, air conditioner 1 can ensure freezing for stable water Amount.

After freezing operating, air conditioner 1 carries out following act: improve the operating of the temperature of heat exchanger 16, it will be hot Exchanger 16 sharply heats, and white (ice) is thawed (thawing) (hereinafter referred to as " defrosting movement ").In present embodiment, it will carry out The operating of defrosting movement is known as " operating of thawing ".Air conditioner 1 is returned to white (ice) at water by thaw operating.At this point, empty Tune machine 1 wanders the subtle dust for being attached to heat exchanger 16 using the impetus that the water for being defrosted (thawing) is fallen.It is empty as a result, Tune machine 1 can be improved the maintainability of heat exchanger 16, effectively clean heat exchanger 16.Hereinafter, by the cleaning treatment (by freezing The cleaning treatment that operating and operating of thawing carry out) it is known as " freezing to clean ".

In addition, air conditioner 1 receives the water (drain water) flowed out when thawing and operating with drain pan 17.In 17 shape of drain pan The flow path of Cheng Shui (drain water) flowing.The inner wall of flow path is implemented for making water (drain water) to hold runny mirror finish. Moreover, being connected with drainpipe in flow path.The water flowed out (drain water) is discharged to the outer of cabinet 7 via drainpipe by air conditioner 1 Portion.

The structure > of < drain pan

Hereinafter, being illustrated referring to Fig. 3 to Fig. 6 to the structure of drain pan 17.In present embodiment, with drain pan 17 with The integrally formed structure of cabinet 7 is illustrated.Fig. 3 is the perspective view of the drain pan sections of cabinet 7.Fig. 4 is drain pan sections The partial enlarged view of preceding drain pan 17F.Fig. 5 is the surface area for indicating heat exchanger 16 and the excretion water for freezing cleaning generation The chart figure of relationship.Fig. 6 is the schematic diagram for indicating the arrangement of drainpipe 22 of drain pan sections.

As shown in figure 3, drain pan 17 has the rear drain pan 17R for the lower section for being configured at rear heat exchange 16R (referring to Fig. 2) With the preceding drain pan 17F for the lower section for being configured at front heat exchanger 16F (referring to Fig. 2).In present embodiment, in rear drain pan 17R Two sides be equipped with access 21a, 21b.In addition, being equipped with drainpipe 22a, 22b in the two sides of preceding drain pan 17F.Hereinafter, being referred to as In the case where access 21a, 21b, referred to as " access 21 ".In addition, referred to as " being arranged in the case where being referred to as drainpipe 22a, 22b Water pipe 22 ".

Drain pan 17R receives the water to drip from rear heat exchange 16R (referring to Fig. 2) afterwards.The bottom surface of drain pan 16R is from remote afterwards It is sloped downwardly from 21 side of access towards close to one.In present embodiment, the bottom surface of rear drain pan 16R becomes left and right directions Substantial middle is high nearby and left part and the right part the shape lower bottom of than.As a result, from rear heat exchange 16R (referring to Fig. 2) drop Under water flow out to access 21 from rear drain pan 16R.

The bottom surface of access 21 is sloped downwardly from the side rear drain pan 16R towards preceding drain pan 16F.It is handed over as a result, from rear heat The water that parallel operation 16R (referring to Fig. 2) drips flows out to preceding drain pan 17F from access 21.

As shown in figure 4, preceding drain pan 17F is connected to drainpipe 22.In present embodiment, drainpipe 22 is formed as and cabinet The round tube of 7 one, and become its entrance 23 in the construction of the inner opening of preceding drain pan 17F.

Preceding drain pan 17F receives the water to drip from front heat exchanger 16F (referring to Fig. 2).In addition, from rear heat exchange 16R Drain pan 17F before the water that (referring to Fig. 2) drips is flowed into from the side rear drain pan 16R.It drips from front heat exchanger 16F (referring to Fig. 2) Water and the water that drips from rear heat exchange 16R (referring to Fig. 2) outside of indoor unit 2 is expelled to by drainpipe 22.Hereinafter, The case where being referred to as from front heat exchanger 16F (referring to Fig. 2) water to drip and from the water that rear heat exchange 16R (referring to Fig. 2) drips Under, referred to as " drain water ".

The volume > of < drain pan

Indoors in machine 2, when freezing operating, than being attached to per unit time under common refrigeration operation or dehumidifying operating A large amount of white (ice) more than the water of rear heat exchange 16R and front heat exchanger 16F is attached to rear heat exchange 16R and preceding heat is handed over Parallel operation 16F.Moreover, the frost (ice) for being attached to rear heat exchange 16R and front heat exchanger 16F thaws simultaneously when thawing operating. As a result, being generated more than the water generated per unit time under common refrigeration operation or dehumidifying operating when freezing cleaning A large amount of drain water, and dripped simultaneously to rear drain pan 17R and preceding drain pan 17F.

Thus, it is supposed that being generated when rear drain pan 17R and preceding drain pan 17F can not stockpile defrosting operating a large amount of In the case where the volume of drain water, drain water is in the phase until the outside for being expelled to indoor unit 2 by drainpipe 22a, 22b Between, it is overflowed from preceding drain pan 17F or rear drain pan 17R.As a result, drain water can escape to the outside of indoor unit 2.Therefore, the phase The outside for hoping air conditioner 1 that a large amount of drain water generated when thawing operating will not be made to drain to indoor unit 2.Therefore, it is desirable to drain Disk 17 is equipped with the volume that a large amount of drain water generated when thawing operating will not be made to overflow.

Therefore, in present embodiment, indoor unit 2 is configured to, the whole that rear drain pan 17R and preceding drain pan 17F are added up Drain pan 17 volume be freeze operating when be attached to the frost of heat exchanger 16 or total adhesion amount of ice or more.But it is examining Consider in the case that drain water is discharged to the outside of indoor unit 2 by drainpipe 22, indoor unit 2 is preferably constructed to, relative to freezing The frost of heat exchanger 16 or total adhesion amount of ice are attached to when knot operating, the volume of drain pan 17 is [total adhesion amount-of frost or ice Time needed for the defrosting of the displacement × whole frost or ice of drainpipe per unit time and frost or subglacial up to whole The shorter time in time needed for until dropping down onto above-mentioned drain pan] more than.For the point, described in detailed below.

Here, Fig. 5 indicates the table for whole heat exchangers 16 that rear heat exchange 16R and front heat exchanger 16F is added up Area and the relationship in the excretion water (total adhesion amount of frost or ice) for freezing to generate when cleaning.Fig. 5 indicates temperature 27 indoors DEG C and indoor humidity 35% under conditions of be measured to air conditioner 1 when freeze cleaning experimental result.As shown in figure 5, root It factually tests, for example, the surface area in rear heat exchange 16R and front heat exchanger the 16F whole heat exchangers 16 added up is 15m²In the case where, generate the drain water of 34.2ml.It is, the excretion water generated when that will thaw operating is (white or ice Total adhesion amount) it is set as w, and in the case that the surface area of heat exchanger 16 is set as x, water w is drained relative to heat exchanger 16 Surface area x be [w=2.28x] relationship.

In addition, being carried out in the case where freezing cleaning under environment low when the experiment of humidity ratio Fig. 5 indoors, even if heat exchange The surface area x of device 16 is identical, and freeze-off time is identical, and the excretion water that white (ice) generates after thawing also is reduced.In addition, indoors It is carried out under high environment when the experiment of humidity ratio Fig. 5 in the case where freezing cleaning, the drain water that white (ice) generates after thawing can It is adjusted by adjusting freeze-off time.Therefore, if the rear drain pan 17R and preceding drain pan 17F of indoor unit 2 add up it is whole The volume y of drain pan 17₀For w or more, i.e., [y₀=2.28x] more than, then it can prevent from making the drain water generated because freezing cleaning Escape to outside.Therefore, the volume y of drain pan 17₀Preferably 2.28x or more.

But above-mentioned value y₀It is not consider drain water from drainpipe 22 from preceding drain pan 17F to the outer of outdoor unit 2 The volume of drain pan 17 in the case where the drainage sunk well in portion.In contrast, the defrosting of indoor unit 2 and white (ice) is handled concurrently It carries out drain water from drainpipe 22 from preceding drain pan 17F to the drainage sunk well of the outside of outdoor unit 2.

Therefore, in the case where considering the drainage sunk well of drain water, indoor unit 2 can will be from above-mentioned value y₀It subtracts and passes through Value y after the displacement (for example, x) of the drain water of drainage sunk well discharge₁Set the volume as drain pan 17.It is, In the case where the drainage sunk well for considering drain water, for indoor unit 2, add if it is rear drain pan 17R and preceding drain pan 17F The volume y of the whole drain pans 17 come₁For more than [w-x], be [y₁=(2.28-1) x] more than, then it can prevent from making to freeze The drain water that cleaning generates escapes to outside.Accordingly, it is considered to the volume of the drain pan 17 in the case where the drainage sunk well of drain water y₁Preferably (2.28-1) x or more.

Value 2.28x in above-mentioned value (2.28-1) x is equivalent to [total adhesion amount (m of frost or ice³)].In addition, value x is suitable In [displacement (the m of drainpipe 22 per unit time³/ s) × whole frost or ice defrosting needed for time and until all Frost or ice fall to drain pan 17 until needed for time in the shorter time (s)].Therefore, in other words, with regard to indoor unit 2 For, if it is considered that the volume y of the drain pan 17 in the case where the drainage sunk well of drain water₁For [total adhesion amount of frost or ice (m³Displacement (the m of the drainpipe 22 of)-per unit time³/ s) × whole frost or ice defrosting needed for time and until complete The shorter time (s) of the frost or ice in portion time required until falling to drain pan 17] more than, then it can prevent from making to freeze clear The drain water for washing generation escapes to outside.

In addition, the volume as drain pan 17, can select to apply above-mentioned value y according to operation₀Or application is above-mentioned Value y₁.Applying above-mentioned value y₀In the case where volume as drain pan 17, since the volume of drain pan 17 becomes larger, though So make indoor unit 2 enlarged, but drain water is overflowed from drain pan 17, biggish boundary can be set.On the other hand, it is answering With above-mentioned value y₁In the case where volume as drain pan 17, the volume of drain pan 17 can be reduced, therefore, interior can be made Machine 2 minimizes.

In addition, indoor unit 2 is preferably constructed to, not only a large amount of excretion for making to generate when thawing operating is arranged in drain pan 17 The volume that water is not spilt over, and drain water can be made not overflow from preceding drain pan 17F, by whole drain waters by drainpipe 22 Easily it is discharged to the outside of indoor unit 2.Here, " whole drain waters " refer to the drain water to drip from rear heat exchange 16R The water added up with the drain water to drip from front heat exchanger 16F.

Therefore, in present embodiment, with the depth h (reference of internal diameter R (referring to Fig. 6) and preceding drain pan 17F of drainpipe 22 The mode for Fig. 6) meeting the relationship of the formula (9) of postscript constitutes indoor unit 2.For the point, describe in detailed below.

Here, the flow of the drain water flowed per unit time in drainpipe 22 is the round tube i.e. inside of drainpipe 22 The product of the rate of outflow of sectional area and drain water.Therefore, if by the flow of the drain water flowed per unit time in drainpipe 22 It is set as " Q " (m³/ s), the internal diameter of drainpipe 22 is set as " R " (m), its radius is set as " r " (m) (it is, [R=2r]), And the rate of outflow of the drain water flowed in drainpipe 22 is set as " v " (m³/ s), then it is flowed per unit time in drainpipe 22 Drain water flow " Q " (m³/ s) be formula below (1) relationship.

[formula 1]

Q=r²πv...(1)

In addition, acceleration of gravity is set as " g " (m/s if the depth of preceding drain pan 17F is set as " h " (m)²), then basis " rolling over sharp theorem in Tuoli ", in the rate of outflow " the v " (m for the drain water that drainpipe 22 flows³/ s) be formula below (2) relationship. In addition, " rolling over sharp theorem in Tuoli " is to be related to the outflow of the liquid when the side for the container for being put into liquid offers smaller hole The theorem of speed.In addition, the depth " h " of preceding drain pan 17F is not make the upper limit face of drain water spilling to the bottom of preceding drain pan 17F The value of face BS1.

[formula 2]

Above-mentioned formula (2) is substituted into above-mentioned formula (1), to obtain formula below (3).

[formula 3]

Here, the flow " Q " of the drain water flowed per unit time in drainpipe 22 is to flow for each hour (3600 seconds) Excretion water (total adhesion amount of frost or ice) " the w " (m generated when thawing operating³), that is, " w × 10⁶”(mm³) flow. Moreover, excretion water (total adhesion amount of frost or ice) " w " is equivalent to the volume y for requiring drain pan 17₀.Therefore, per unit time In the relationship that the flow " Q " for the drain water that drainpipe 22 flows is formula below (4).

[formula 4]

Above-mentioned formula (4) is substituted into above-mentioned formula (3), to obtain formula below (5).

[formula 5]

According to above-mentioned formula (5), formula below (6) can be obtained.

[formula 6]

According to above-mentioned formula (6), formula below (7) further can be obtained.

[formula 7]

The internal diameter " R " of drainpipe 22 is that therefore according to above-mentioned formula (7), formula below further can be obtained in [R=2r] (8)。

[formula 8]

For drainpipe 22, by keeping internal diameter " R " bigger than the value of the relationship of above-mentioned formula (8), so as to make to drain Water will not be overflowed from preceding drain pan 17F, and whole drain waters is easily discharged to the outside of indoor unit 2 by drainpipe 22. Therefore, the depth h (referring to Fig. 6) of the internal diameter R (referring to Fig. 6) of drainpipe 22 and preceding drain pan 17F is set as meeting below The relationship of formula (9) passes through whole drain waters so that drainpipe 22 can be such that drain water does not overflow from preceding drain pan 17F Drainpipe 22 is easily discharged to the outside of indoor unit 2.

[formula 9]

In addition, y₀It is the volume for whole drain pans 17 that rear drain pan 17R and preceding drain pan 17F is added up, relative to The surface area x for whole heat exchangers 16 that rear heat exchange 16R and front heat exchanger 16F is added up, becomes [y₀=2.28x] Relationship.In addition, the internal diameter R of drainpipe 22 is preferably for example preferably 11mm or more.

Indoor unit 2 is configured to, and the depth h of the internal diameter R of drainpipe 22 and preceding drain pan 17F meet the pass of above-mentioned formula (9) System.Drain water can be discharged to the outside of indoor unit 2 by such indoor unit 2 before drain water is overflowed from preceding drain pan 17F.And And by cabinet 7, ineffectually enlargement just can not be discharged in a large amount of drain water for freezing cleaning generation indoor unit 2 well.

In addition, central axis C22 dips down from entrance 23 towards outlet 24 as shown in fig. 6, drainpipe 22 is preferably configured to Tiltedly.The drain water of drain pan 17F is smoothly discharged to outside before indoor unit 2 can will be accumulated in as a result,.

In addition, being attached to the dust of front heat exchanger 16F and rear heat exchange 16R together with drain water when freezing cleaning Also it is wandered.Therefore, near the entrance 23 of drainpipe 22, drain water and dust are lumped together into mud shape and are easy to deposit Product.As a result, there is a possibility that flowing into the inside of drainpipe 22 as the drain water and dust of mud shape.

But indoor unit 2 is by being arranged obliquely drainpipe 22, thus flow into the inside of drainpipe 22 drain water and Dust is easy to fall because of self weight.Therefore, for indoor unit 2, that is, the drain water and dust for becoming mud shape flow into draining They also can be sent to well outside by the inside of pipe 22.Such indoor unit 2 can keep the inside of drainpipe 22 For the state being discharged suitable for drain water.In addition, indoor unit 2 itself can also inhibit drain water and dust entering in drainpipe 22 Mouth 23 nearby stockpiles.As a result, indoor unit 2 can be improved the drainage efficiency of the drain water of drain pan 17F before being accumulated in.

In addition, the bottom surface BS1 of preceding drain pan 17F can also for example be deformed as illustrated in fig. 7.Fig. 7 is to indicate drainpipe 22 Other arrangement schematic diagram.As shown in fig. 7, preceding drain pan 17F is configured to, the bottom near the entrance 23 of drainpipe 22 Face BS2 is sloped downwardly from 23 side of entrance far from drainpipe 22 towards close to one.It is, preceding drain pan 17F becomes The bottom surface of the near exit of flow path is formed with the shape of recess portion.Moreover, the inclination angle alpha 22 of the central axis C22 of drainpipe 22 is 17 or more the inclination angle alpha of the bottom surface BS1 of preceding drain pan 17F near the entrance 23 of drainpipe 22.Such indoor unit 2 is easy Flow the drain water containing dust of drain pan 17F before being accumulated in the direction of drainpipe 22 because being self-possessed.Therefore, Fig. 6 is compared Shown in structure, indoor unit 2 can be more smoothly discharged be accumulated in front of drain pan 17F drain water.As a result, 2 energy of indoor unit It is enough to improve the drainage efficiency for being accumulated in the drain water of preceding drain pan 17F.

The entrance 23 of drainpipe 22 can also for example be deformed such as Fig. 8 or as shown in Figure 9.Fig. 8 is to indicate entering for drainpipe 22 The schematic diagram of outlet structure.Fig. 9 is the schematic diagram for indicating the other inlet configuration of drainpipe 22.

In example shown in Fig. 8, the entrance 23 of drainpipe 22 becomes the entrance 23 that lower part half cycle is extended to drainpipe 22 Front shape.Indoor unit 2 is configured to as a result, the center of the opening area S23 of the entrance 23 of drainpipe 22 than drainpipe 22 Neighbouring sectional area S22M is big.

In addition, the entrance 123 of drainpipe 22 is formed as elliptical shape upward in example shown in Fig. 9.It is indoor as a result, Machine 2 is configured to, and the opening area S123 of the entrance 123 of drainpipe 22 is bigger than the sectional area S22M near the center of drainpipe 22.

In Fig. 8 or structure shown in Fig. 9, drainpipe 22 can effectively obtain the excretion for being accumulated in preceding drain pan 17F Water is simultaneously expelled to outside.The drain water containing dust can be efficiently directed into the inside of drainpipe 22 by indoor unit 2 as a result,.Cause This, even if drain water and dust are lumped together into mud shape and are difficult to be discharged, indoor unit 2 near the entrance 23 of drainpipe 22 Also them can be made to import the inside of drainpipe 22 and pass out to outside well.Indoor unit 2 itself the also row of being able to suppress as a result, It sluices and dust stockpiles near the entrance 23 of drainpipe 22.As a result, indoor unit 2 can be improved drain pan 17F before being accumulated in Drain water drainage efficiency.

The variation > of the drain pan sections of < cabinet

The drain pan sections of cabinet 7 can also for example deform cabinet 7A, 7B, 7C as shown in Figure 10 A to Figure 10 C. Figure 10 A to Figure 10 C is the schematic diagram for indicating the variation of drain pan sections of cabinet 7 respectively.

In the example shown in Figure 10 A, cabinet 7A is difference compared with cabinet 7 shown in Fig. 3: rear drain pan 17R at For extended shape in left-right direction；And interconnecting part 21a, 21b are configured at the position of the front side of rear drain pan 17R.Therefore, In cabinet 7A, access 21a, 21b are configured at the position near the left and right sides of rear drain pan 17R.Moreover, access 21a, 21b are formed as, and bottom surface is sloped downwardly from the side rear drain pan 17R towards preceding drain pan 17F.

In the example shown in Figure 10 B, cabinet 7B is difference compared with cabinet 7 shown in Fig. 3: access 21 is only configured In the position of the left and right side of rear drain pan 17R.In addition, rear drain pan 17R is formed as, bottom surface is from far from 21 side of access It is sloped downwardly towards close to one.

In example shown in Figure 10 C, the difference compared with cabinet 7B shown in cabinet 7C and Figure 10 B is: rear drain pan 17R As extended shape in left-right direction；And access 21 is configured at the position of the front side of rear drain pan 17R.

Shown in cabinet 7A, 7B, 7C as shown in Figure 10 A to Figure 10 C, access 21 can not also be configured at front-seat water pond The two sides of 17F and rear drain pan 17R and be configured at the position near the left and right sides of rear drain pan 17R, rear drain pan 17R The position or the position near side of left and right side.Access 21 can be connected to preceding drain pan 17F and rear drain pan as a result, 17R.Moreover, the bottom surface of rear drain pan 17R is configured to, compared to far from the side access 21a, 21b, close side is slightly lower.In this way Figure 10 A to Figure 10 C shown in cabinet 7A, 7B, 7C can be improved access 21 arrangement freedom degree, and can mention Drainage of the height from the rear heat exchange 16R drain water that drain pan 17R drips backward.

In addition, indoor unit 2 can inhibit drain water and dust to deposit by construction shown in appropriately combined Fig. 6 to Figure 10 C Product is near the entrance 23 of drainpipe 22.As a result, indoor unit 2 can be improved the row of the drain water of drain pan 17F before being accumulated in Water efficiency.

The main feature > of < indoor unit

(1) in the indoor unit 2 of present embodiment, the volume of drain pan 17, which becomes, to be freezed to be attached to heat exchanger 16 when operating Frost or ice total adhesion amount w or more.Moreover it is preferred that considering that guide sluices is discharged to indoor unit 2 by drainpipe 22 External situation, indoor unit 2 are also configured to, and the volume of drain pan 17 becomes [when total adhesion amount-per unit of frost or ice Between drainpipe 22 displacement × whole frost or ice defrosting needed for time and until whole frosts or ice falls to row The shorter time in time needed for until water pond 17] more than.Moreover, in this case, be configured to, rear drain pan 17R and The volume for whole drain pans 17 that preceding drain pan 17F is added up has added relative to rear heat exchange 16R and front heat exchanger 16F The surface area x of the whole heat exchangers 16 come is (2.28-1) x or more.

In such indoor unit 2, drain pan 17 is provided with a large amount of drain water generated when operating that do not make to thaw and overflows Volume.Therefore, indoor unit 2 can not make drain water escape to outside when thawing cleaning.

(2) position or the position near two sides that access 21 can be configured at the left and right sides of rear drain pan 17R, and And can be configured to, bottom surface is sloped downwardly from the side rear drain pan 17R towards preceding drain pan 17F (referring to Fig. 3 or Figure 10 A). Alternatively, position or the position near side that access 21 can be configured at the left and right side of rear drain pan 17R, and can It is configured to, bottom surface is sloped downwardly (0B or Figure 10 C referring to Fig.1) from the side rear drain pan 17R towards preceding drain pan 17F.The knot In the case where structure, the bottom surface of rear drain pan 17R is preferably constructed to be sloped downwardly from far from 21 side of access towards close to one.

Such indoor unit 2 can be improved the freedom degree of the arrangement of access 21, and can be improved and hand over from rear heat The drainage of the parallel operation 16R drain water that drain pan 17R drips backward.

(3) it in the case where acceleration of gravity is set as g, is added up relative to rear drain pan 17R and preceding drain pan 17F The volume y of whole drain pans 17₀, the depth h of the internal diameter R of drainpipe 22 and preceding drain pan 17F preferably meets formula below (10) relationship.

[formula 10]

Drain water can be discharged to the outer of indoor unit 2 before drain water is overflowed from preceding drain pan 17F by such indoor unit 2 Portion.Moreover, indoor unit 2, which does not make cabinet 7 not imitate ground enlargement and just can be discharged well, freezes a large amount of excretion that cleaning generates Water.

(4) bottom surface of drain pan 17F is at least near the entrance 23 of drainpipe 22 from the entrance 23 far from drainpipe 22 before Side is sloped downwardly towards close to one (referring to Fig. 7).

For such indoor unit 2, even if drain water and dust are mixed near the entrance 23 of drainpipe 22 For mud shape, the drain water and dust that become the mud shape flow into the inside of drainpipe 22, also can send out well they. The inside of drainpipe 22 can be remained the state of the draining suitable for drain water by such indoor unit 2.In addition, indoor unit 2 Body is also able to suppress drain water and dust and stockpiles near the entrance 23 of drainpipe 22.As a result, indoor unit 2 can be improved and stockpile In the drainage efficiency of the drain water of preceding drain pan 17F.

(5) drainpipe 22 is configured to, and central axis C22 is tilted down from entrance 23 towards outlet 24.Moreover, drainpipe 22 The inclination angle alpha 22 of central axis C is the inclination angle alpha 17 of the bottom surface BS2 of the preceding drain pan 17F near the entrance 23 of drainpipe 22 Above (referring to Fig. 7).

Such indoor unit 2 is easy the drain water containing dust of drain pan 17F before making to be accumulated in because of self weight flow direction draining The direction of pipe 22.Therefore, indoor unit 2 can be smoothly discharged the drain water for being accumulated in preceding drain pan 17F.As a result, indoor unit 2 It can be improved the drainage efficiency of the drain water of drain pan 17F before being accumulated in.

(6) indoor unit 2 can be configured to, and the opening area S23 of the entrance 23 of drainpipe 22 is (alternatively, the opening of entrance 123 Area S123) it is bigger (referring to Fig. 8 and Fig. 9) than the sectional area S23M near the center of drainpipe 22.

Such indoor unit 2 can effectively be obtained the row containing dust for being accumulated in preceding drain pan 17F by drainpipe 22 It sluices, and is discharged to the outside.Indoor unit 2 can make the drain water containing dust be efficiently directed into the inside of drainpipe 22 as a result,. Therefore, even if near the entrance 23 of drainpipe 22, drain water and dust are lumped together into mud shape and are difficult to be discharged, indoor Machine 2 can also make them import the inside of drainpipe 22, be sent to outside well.Indoor unit 2 itself is also able to suppress as a result, Drain water and dust stockpile near the entrance 23 of drainpipe 22.As a result, indoor unit 2, which can be improved, is accumulated in preceding drain pan The drainage efficiency of the drain water of 17F.

As described above, the indoor unit 2 of 1 air conditioner 1 according to the present embodiment, can not be such that water leaks out when freezing cleaning To outside.

[embodiment 2]

In present embodiment 2, the indoor unit 2A for considering point below is provided.

(1) assume the internal residual of drain pan 17 have drain water, dust it is residual in the case where, worry freeze to clean in next time Shi Fasheng spilling water generates miscellaneous bacteria (including mould class).Therefore, indoor unit 2A is by being arranged postscript in the inside of drain pan 17 Bump 130 (1 and Figure 12 referring to Fig.1) reduces the surface tension (binding force) of drain water, and drain water is made to be easy flowing.By This, indoor unit 2A is easy to flow dust together with drain water, reduces the residual quantity for remaining on the dust of inside of drain pan 17. Wherein, the bump 130 (referring to Fig.1 2) of postscript is not set to the position of the positive front of the entrance 23 (referring to Fig.1 2) of drainpipe 22, The accumulation of the dust near entrance 23 to inhibit drainpipe 22.

(2) due to freezing cleaning cold drain water flows into the inside of drain pan 17 when, so that it is solidifying to deposit aerial moisture A possibility that tying and forming condensed water and be attached to each position (for example, lower face side of preceding drain pan 17F) of drain pan 17.In It is, for example, there are condensing water droplets to drop down onto air blowout in the case where the lower face side of drain pan 17F before condensed water is attached to In mouth 13 (referring to Fig. 2) and to a possibility that indoor splashing.Condensed water can leak to the outside of indoor unit 2A as a result,.Therefore, it is Inhibit the generation of condensation, insulation (foamed resin part) 111 (references of indoor unit 2A in each portion of drain pan 17 configuration postscript Figure 11 and Figure 12) etc..Wherein, indoor unit 2A is configured to, the rate of outflow not reduce drain water when draining and the not row of reduction The mode of water efficiency considers the allocation position and shape that the insulation (foamed resin part) 111 of postscript waits.

(3) cabinet 7 for constituting drain pan 17 carries out processing and is difficult.Therefore, indoor unit 2A is in the inside of drain pan 17 When bump 130 (1 and Figure 12 referring to Fig.1) of postscript is set, the other portion different from the cabinet 7 of drain pan 17 is constituted is used The bump 130 of part setting postscript.It is, indoor unit 2A passes through after the configuration of the upper surface of the inside of drain pan 17 is formed with Exhausted insulation (foamed resin part) 111 (1 and Figure 12 referring to Fig.1) of the postscript of the bump 130 of note etc., thus in drain pan 17 Inside setting postscript bump 130.

(4) in the case where assuming to be formed with gap between heat exchanger 16 and drain pan 17, due to forming obstructed overheat The wind path of the air of exchanger 16, therefore the heat exchanger effectiveness of indoor unit 2A reduces.Additionally, there are the gap generate drip (to The external leak of indoor unit 2A) a possibility that.Therefore, indoor unit 2A is made into the knot for being close to heat exchanger 16 and drain pan 17 Structure is made into the structure (referring to Fig.1 6) that gap can not be formed between heat exchanger 16 and drain pan 17.

Hereinafter, referring to Fig.1 1 to Figure 16, the structure of the indoor unit 2A of present embodiment 2 is illustrated.Figure 11 is indoor The perspective view of the drain pan sections for the cabinet 107 that machine 2A is used.Figure 12 is the partial enlargement of the preceding drain pan 17F of drain pan sections Figure.Figure 12 enlargedly shows the structure near the portion A of Figure 11.Figure 13 is the insulation (foamed resin that present embodiment 2 uses Part) 111 perspective view.Figure 14 and Figure 15 is the partial enlarged view of the Drainage Division 120 of preceding drain pan 17F respectively.Figure 14 is shown The structure of Drainage Division 120 after the line B-B cutting of Figure 12.Figure 15 shows the Drainage Division after the line C-C cutting of Figure 12 Structure near the entrance 23 of 120 drainpipe 22.Figure 16 is the configuration relation for indicating heat exchanger 16F Yu preceding drain pan 17F Schematic diagram.

Compared with the indoor unit 2 (referring to Fig. 2) of the indoor unit 2A of present embodiment 2 and embodiment 1, point below not Together.

(1) the surface side of the tray portion 110 of preceding drain pan 17F be equipped be formed with protrusion 112 insulation 111 (ginseng According to Figure 11 and Figure 12).Tray portion 110 is the circuit portion extended along the left and right directions of preceding drain pan 17F.

(2) protrusion 122 (1 and Figure 12 referring to Fig.1) is formed in the Drainage Division 120 of preceding drain pan 17F.Drainage Division 120 is The circuit portion extended along the front-rear direction (front and back side direction) of preceding drain pan 17F.

(3) it is equipped in the tray portion 160 of rear drain pan 17R and is formed with the insulation 161 (referring to Fig.1 1) of protrusion 162. Tray portion 160 is the circuit portion extended along the left and right directions of rear drain pan 17R.

(4) protrusion 172 (referring to Fig.1 1) is equipped in access 21.

(5) rear side of the Drainage Division 120 of the preceding drain pan 17F near the entrance 23 of drainpipe 22 is equipped with insulation 211 (referring to Fig.1 5).

Above-mentioned insulation 111 (1 and Figure 12 referring to Fig.1), insulation 161 (referring to Fig.1 1) and (ginseng of insulation 211 According to Figure 15) it is to inhibit to flow into the inside of drain pan 17 due to drain water cold when freezing cleaning to which the moisture in air exists Each portion of drain pan 17 condenses, and is installed on the component of the cabinet 107A of indoor unit 2A.Indoor unit 2A passes through in drain pan 17 Each portion configures insulation 111,161,211, is attached to draining so as to inhibit the hydrogenesis in air to form condensed water Disk 17.

These insulations 111,161,211 foamed resin low such as the hygroscopicity as foam styrene, foamed polyurethane Part is constituted.Particularly, be formed with excretion water flowing flow path insulation 111,161 due to being made of the low material of hygroscopicity, So its surface has hydrophobicity.Such insulation 111,161 is not due to aqueous, so being able to suppress mould generation.In addition, Insulation 111,161 can easily evaporate the drain water for flowing into circuit portion.Therefore, insulation 111,161 can aid in The miniaturization of drain pan 17.Furthermore it is preferred that being preferably to implement in the circuit portion of insulation 111,161 for keeping drain water easy In the mirror finish of flowing.

An example of Figure 13 expression insulation 111.Insulation 111 is configured to, and can be installed on along the inside of preceding drain pan 17F The Drainage Division 120 that extends of front-rear direction (front and back side direction).As shown in figure 13, it is formed in the upper surface of insulation 111 There is protrusion 112.Protrusion 112 is formed as extending along the flow direction (extending direction of flow path) of drain water.Protrusion 112 is as reduction The bump 130 of the surface tension (binding force) of drain water functions.Indoor unit 2A is reduced by the protrusion 112 of insulation 111 The surface tension (binding force) of drain water, so that even if the water droplet for being not to wait for drain water, which is bonded to each other, grows into large-sized water Drop, can also be such that drain water easily flows in the state of the water droplet of small size.Indoor unit 2A can make dust and row as a result, It sluices and is easy flowing together, reduce the residual quantity for remaining on the dust of inside of drain pan 17.

Insulation 161 (referring to Fig.1 1) is in shape identical with insulation 111.Insulation 161 is configured to, after being mountable to The inside of drain pan 17R.Protrusion 162 same as protrusion 112 is formed in the upper surface of insulation 161.Protrusion 162 is formed as Direction (direction that flow path extends) along excretion water flowing extends.

Insulation 211 (referring to Fig.1 5) is configured to, the preceding drain pan that can be installed near the entrance 23 of drainpipe 22 The space that the downside of the Drainage Division 120 of 17F is formed.

Protrusion 122 (1 and Figure 12 referring to Fig.1) is formed in the Drainage Division 120 of above-mentioned preceding drain pan 17F.122 shape of protrusion Become, the direction (direction that flow path extends) along excretion water flowing extends.In the present embodiment, the upper surface shape of protrusion 122 Planar (referring to Fig.1 4) as general planar.Protrusion 122 and protrusion 112 are similarly as the surface tension for reducing drain water The bump 130 of (binding force) functions.

Protrusion 122 is formed as, and removes the positive anterior locations (referring to Fig.1 2) of the entrance 23 of drainpipe 22.Indoor unit as a result, 2A inhibits the accumulation of the dust near the entrance 23 of drainpipe 22.

In the present embodiment, protrusion 122 is configured to, and is formed directly into the cabinet 107 of drain pan 17F before constituting.But Indoor unit 2A can also in advance in other component (not shown) the formation protrusion 122 different from cabinet 107, by by this in addition Component be installed on Drainage Division 120, so that protrusion 122 is configured at Drainage Division 120.

In addition, what the bottom surface of the Drainage Division 122 of preceding drain pan 17F was sloped downwardly as the entrance 23 towards drainpipe 22 Shape (referring to Fig.1 2).It is formed with it is, the Drainage Division 122 of preceding drain pan 17F becomes in the bottom surface of the near exit of flow path The shape of recess portion.Indoor unit 2A makes drain water be easy to flow to the direction of the entrance 23 of drainpipe 22 as a result,.

Protrusion 172 (Figure 11 reference) is equipped in above-mentioned access 21.Protrusion 172 is formed as along the direction of excretion water flowing (direction that flow path extends) extends.In present embodiment, protrusion 172 is configured to be formed directly into the case for constituting preceding drain pan 17F Body 107.

As shown in figure 16, in the present embodiment, heat exchanger 16 (in illustrated example, front heat exchanger 16F) and draining Disk 17 (in illustrated example, preceding drain pan 17F) is configured in mode against each other, so that blocking is configured with 14 (reference of Air Blast fan Between space Fig. 2) and the space on the outside of it.As a result, indoor unit 2A be made into make heat exchanger 16 (in illustrated example, preceding heat exchange Device 16F) and the structure be close to of drain pan 17 (in illustrated example, preceding drain pan 17F), become heat exchanger 16 and drain pan 17 it Between can not form the structure in gap.Between such indoor unit 2A is able to suppress because being formed between heat exchanger 16 and drain pan 17 Gap and make heat exchanger effectiveness reduce, generate drip (External leakage of the water to indoor unit 2A) the case where.

In addition, indoor unit 2A is by being close to heat exchanger 16 and drain pan 17, so as to make to be attached to heat exchanger The condensed water of 16 fin 20 is easy mobile from the fin 20 of heat exchanger 16 to drain pan 17.Indoor unit 2A can be mentioned as a result, The efficiency that height wanders the dust for being attached to heat exchanger 16.

< variation >

The insulation (foamed resin part) 111 that the tray portion 110 of preceding drain pan 17F uses for example can be such as Figure 17 and Figure 18 It is shown to deform.Figure 17 is the schematic diagram of insulation (foamed resin part) 111A of variation.Figure 17 (a) shows insulation The plan view shape of 111A, Figure 17 (b) show the cross-sectional shape of insulation 111A.Figure 18 is the insulation (foam of variation Resin piece) 111B schematic diagram, show the plan view shape of insulation 111B.

In the example shown in Figure 17 (a), insulation 111A is configured to, the protrusion 212 of multiple substantially rectangular shape along longitudinal direction and It laterally equally spaced configures, recess portion 213 is formed between protrusion 212 and protrusion 212.As shown in Figure 17 (b), recess portion 213 is in The shape for the general triangular widened to upside.Recess portion 213 is equally spaced formed with depth h213, width t213.

Such insulation 111A is reduced the surface tension (binding force) of drain water by protrusion 212, to even if be not to wait for The water droplet of drain water, which is bonded to each other, grows into large-sized water droplet, and drain water can also be made to be easy with the state of the water droplet of small size Flowing.Therefore, indoor unit 2A can be easy to flow dust together with drain water, can reduce by using insulation 111A Remain on the residual quantity of the dust of the inside of drain pan 17.In addition, insulation 111A is due to being formed with protrusion in circuit portion 212, therefore insulation 111 (referring to Fig.1 3) are compared, surface area increases.Insulation 111A compares 111 (reference of insulation as a result, Figure 13), the drain water for flowing into circuit portion can be made to be easier to evaporate.

In the example shown in Figure 18, insulation 111B is difference compared with insulation 111A (referring to Fig.1 8): staggeredly Ground configures protrusion 212.Insulation 111B can be reduced the surface tension of drain water in the same manner as insulation 111A by protrusion 212 (binding force) makes drain water be easy flowing.In addition, insulation 111B be formed in the same manner as insulation 111A in circuit portion it is convex Portion 212, therefore insulation 111 (referring to Fig.1 3) are compared, surface area increases.Insulation 111B is same as insulation 111A as a result, Ground is compared insulation 111 (referring to Fig.1 3), and the drain water for flowing into circuit portion can be made to be easier to evaporate.

In addition, the shape of the Drainage Division 120 of preceding drain pan 17F can also for example deform as illustrated in fig. 19.Figure 19 is to become The schematic diagram of the Drainage Division 120 of the preceding drain pan 17F of shape example.

In the example shown in Figure 19, multiple (in illustrated example, two) protrusion 122A are formed in the bottom surface of Drainage Division 120. Protrusion 122A is in the shape to the general triangular of upside reduced width.Protrusion 122A is formed as along the direction of excretion water flowing (direction that flow path extends) extends.Protrusion 122A is formed with depth h122A and width t122A.Such Drainage Division 120 can be by convex Portion 122A reduces the surface tension (binding force) of drain water, and drain water is made to be easy flowing.

As described above, 2 indoor unit 2A according to the present embodiment, in the same manner as the indoor unit 2 of embodiment 1, Neng Gou Freeze to leak to the outside water not when cleaning.Moreover, indoor unit 2A can make drain water be easy flowing, therefore, the row of can be improved The drainage efficiency of sluicing.In addition, indoor unit 2A is able to suppress the hydrogenesis in air and is attached to drain pan 17.

Symbol description

1-air conditioner, 2,2A-indoor unit, 3-outdoor units, 5-connecting pipings, 6-air suction inlets, 7,7A, 7B, 7C, 107-cabinets, 8-adornment frames, 9-front surface panels, 10-receiving units, 11-display units, 12-remote controlers, 13-is empty Air-blowing outlet, 14-Air Blast fans, 15-filters, 16-heat exchangers, the rear heat exchange of 16F-front heat exchanger, 16R- Device, 17-drain pans, the preceding drain pan of 17F-, the rear drain pan of 17R-, 18-up-down wind direction boards, 19-left and right wind direction plates, 20- Fin, 21 (21a, 21b)-access, 22 (22a, 22b)-drainpipes, the entrance of 23,123-drainpipes, 24-drainpipes Outlet, 40-pipe, 110,160-tray portions, 111, the insulation of 111A, 111B, 161,211-(foamed resin part), 112, 122, the protrusion of 122A, 162,172,212-, 120-Drainage Divisions, 130-bumps, 213-recess portions, the preceding drain pan of BS1- Bottom surface, the bottom surface near the drain inlet of the preceding drain pan of BS2-, CL-control unit, C22-drainpipe central axis, H122A-protrusion height, h213-recess depths, the sectional area near S22M-drainpipe center, S23, S123-draining The opening area of the entrance of pipe, t122A-protrusion interval, t213-recess width, the tilt angle of 22-drainpipe of α.

Claims (according to the 19th article of modification of treaty)

A kind of (1. after modification) indoor unit of air conditioner comprising:

Rear heat exchange is configured at the rear of device and carries out heat exchange between air and refrigerant；

Front heat exchanger is configured at the front of device and carries out heat exchange between air and refrigerant；

Control unit, the surface that control makes frost or ice be attached to above-mentioned rear heat exchange and above-mentioned front heat exchanger freeze to transport Turn,

Drain pan afterwards receives the drain water to drip from above-mentioned rear heat exchange；

Preceding drain pan receives the drain water to drip from above-mentioned front heat exchanger and flows through the excretion come from above-mentioned rear drain pan Water；

Access connects above-mentioned rear drain pan and above-mentioned preceding drain pan；And

The drain water for being accumulated in above-mentioned preceding drain pan is expelled to the outside of device by drainpipe from above-mentioned preceding drain pan,

Surface area x (m relative to whole heat exchangers that above-mentioned rear heat exchange and above-mentioned front heat exchanger add up²), with And by the displacement (m from above-mentioned drainpipe per unit time³/ s) and whole frosts or ice thaw needed for time and straight Shorter time (s) phase in time needed for until whole frost or subglacial drop down onto above-mentioned preceding drain pan or above-mentioned rear drain pan Multiply resulting value z × 10^-6(m³), the volume (m for whole drain pans that above-mentioned rear drain pan and above-mentioned preceding drain pan add up³) It is [2.28 × 10^-6(m)×x(m²)-z×10^-6(m³)] more than.

The indoor unit of (2. after modification) air conditioner according to claim 1, which is characterized in that

Above-mentioned access be configured at it is above-mentioned after drain pan the left and right sides position or the position near two sides, and its bottom surface from Drain pan side is sloped downwardly towards above-mentioned preceding drain pan after above-mentioned.

The indoor unit of (3. after modification) air conditioner according to claim 1, which is characterized in that

The position or the position near side that above-mentioned access is configured at the left and right side of above-mentioned rear drain pan, and its bottom surface It is sloped downwardly from above-mentioned rear drain pan side towards above-mentioned preceding drain pan,

The bottom surface of drain pan is sloped downwardly from far from above-mentioned access side towards close to one after above-mentioned.

The indoor unit of (4. after modification) air conditioner according to claim 1, which is characterized in that

Acceleration of gravity is being set as g (m/s²) in the case where, it is added up relative to above-mentioned rear drain pan and above-mentioned preceding drain pan The volume y of whole drain pans₀(m³), the depth h (m) of the internal diameter R of above-mentioned drainpipe and above-mentioned preceding drain pan meets formula below (1) relationship.

[formula 1]

The indoor unit of (5. after modification) air conditioner according to claim 1, which is characterized in that

The bottom surface of above-mentioned preceding drain pan is at least in the entrance of above-mentioned drainpipe from the inlet side court far from above-mentioned drainpipe It is sloped downwardly to close to one.

The indoor unit of (6. after modification) air conditioner according to claim 5, which is characterized in that

Above-mentioned drainpipe is configured to, and central axis is tilted down from entrance towards outlet,

The tilt angle of the central axis of above-mentioned drainpipe is the bottom surface of the above-mentioned preceding drain pan of the entrance of above-mentioned drainpipe It is more than tilt angle.

The indoor unit of (7. after modification) air conditioner according to claim 1, which is characterized in that

Sectional area near the center of the above-mentioned drainpipe of the open area ratio of the entrance of above-mentioned drainpipe is big.

The indoor unit of (8. after modification) air conditioner according to any one of claims 1 to 7, which is characterized in that

The volume of above-mentioned drain pan be it is above-mentioned freeze operating when be attached to the frost of above-mentioned heat exchanger or total adhesion amount of ice or more.

(9. after modification) according to claim 1~any one of 8 described in air conditioner indoor unit, which is characterized in that

Drain pan, above-mentioned preceding drain pan and above-mentioned access form the flow path of above-mentioned drain water after above-mentioned,

Above-mentioned flow path is formed with bump in the bottom surface at arbitrary position.

The indoor unit of (10. after modification) air conditioner according to claim 9, which is characterized in that

Above-mentioned bump is formed along the direction that above-mentioned flow path extends.

The indoor unit of (11. after modification) air conditioner according to claim 9 or 10, which is characterized in that

A part of the bottom surface of above-mentioned preceding drain pan is sloped downwardly from far from above-mentioned drainpipe side towards close to one.

The indoor unit of (12. after modification) air conditioner according to any one of claim 9~11, which is characterized in that

The indoor unit of (13. after modification) air conditioner according to any one of claim 9~12, which is characterized in that

Recess portion is formed in the bottom surface of the near exit of above-mentioned flow path.

The indoor unit of (14. after modification) air conditioner according to any one of claim 9~13, which is characterized in that

The first heat insulating member is configured in the rear side for the circuit portion of above-mentioned preceding drain pan extended along the longitudinal direction.

The indoor unit of (15. after modification) air conditioner according to any one of claim 9~14, which is characterized in that

The second heat insulating member is configured in the table side for the circuit portion of above-mentioned preceding drain pan extended in left-right direction.

The indoor unit of (16. after modification) air conditioner according to any one of claim 9~15, which is characterized in that

Also there is the Air Blast fan being configured between above-mentioned rear heat exchange and above-mentioned front heat exchanger,

Above-mentioned front heat exchanger and above-mentioned preceding drain pan are configured in mode against each other, so that blocking is configured with above-mentioned air-supply wind Between space on the outside of the space of fan and the space.

(17. deletion)

Illustrate or states (according to the 19th article of modification of treaty)

Claim 1~7,9~16 correspond to the claim 3~9 before modification, 10~17.In addition, claim 8 base Claim 1 before modification.

Claim 1 specifies the unit of each symbol, and has modified the mistake of numerical value.

Claim 4 specifies the unit of each symbol, and has modified formula (1).

Claims

1. a kind of indoor unit of air conditioner comprising:

Heat exchanger carries out heat exchange between air and refrigerant；

Drain pan receives the drain water to drip from above-mentioned heat exchanger；And

Control unit, the surface that control makes frost or ice be attached to above-mentioned heat exchanger freeze to operate,

2. a kind of indoor unit of air conditioner comprising:

Heat exchanger carries out heat exchange between air and refrigerant；

Drain pan receives the drain water to drip from above-mentioned heat exchanger；

Control unit, the surface that control makes frost or ice be attached to above-mentioned heat exchanger freeze to operate；And

The drain water for being accumulated in above-mentioned drain pan is expelled to the outside of device by drainpipe from above-mentioned drain pan,

Relative to total adhesion amount of the above-mentioned frost or ice for freezing to be attached to above-mentioned heat exchanger when operating, the volume of above-mentioned drain pan For [time needed for displacement × whole frost of total adhesion amount-drainpipe per unit time of frost or ice or ice thaw with The shorter time in time needed for until whole frost or subglacial drop down onto above-mentioned drain pan] more than.

3. a kind of indoor unit of air conditioner comprising:

The surface area x of the whole heat exchangers added up relative to above-mentioned rear heat exchange and above-mentioned front heat exchanger, it is above-mentioned The volume for whole drain pans that drain pan and above-mentioned preceding drain pan add up afterwards is (2.28-1) x or more.

4. the indoor unit of air conditioner according to claim 3, which is characterized in that

Above-mentioned access be located at it is above-mentioned after drain pan the left and right sides position or the position near two sides, and its bottom surface is from upper Rear drain pan side is stated to be sloped downwardly towards above-mentioned preceding drain pan.

5. the indoor unit of air conditioner according to claim 3, which is characterized in that

Above-mentioned access be located at it is above-mentioned after drain pan left and right side position or the position near side, and its bottom surface from Drain pan side is sloped downwardly towards above-mentioned preceding drain pan after above-mentioned, and the bottom surface of above-mentioned rear drain pan is from far from above-mentioned access one Side is sloped downwardly towards close to one.

6. the indoor unit of air conditioner according to claim 3, which is characterized in that

In the case where acceleration of gravity is set as g, relative to the above-mentioned whole that drain pan and above-mentioned preceding drain pan add up afterwards Drain pan volume y₀, the depth h of the internal diameter R of above-mentioned drainpipe and above-mentioned preceding drain pan meets the relationship of formula below (1).

[formula 1]

7. the indoor unit of air conditioner according to claim 3, which is characterized in that

8. the indoor unit of air conditioner according to claim 7, which is characterized in that

9. the indoor unit of air conditioner according to claim 3, which is characterized in that

10. a kind of indoor unit of air conditioner comprising:

11. the indoor unit of air conditioner according to claim 10, which is characterized in that

12. the indoor unit of air conditioner according to claim 10, which is characterized in that

13. the indoor unit of air conditioner according to claim 10, which is characterized in that

14. the indoor unit of air conditioner according to claim 10, which is characterized in that

15. the indoor unit of air conditioner according to claim 10, which is characterized in that

16. the indoor unit of air conditioner according to claim 10, which is characterized in that

17. the indoor unit of air conditioner according to claim 10, which is characterized in that