CN109196288A - Multi-type air-conditioning device - Google Patents

Abstract

It prevents from generating moisture condensation on the rotor of fan indoors when multi-type air-conditioning device carries out capabilities refrigeration operation.At least one indoor unit in multiple indoor units (40,50,60) is configured to, in the capabilities refrigeration operation for increasing superheat region compared to usual refrigeration operation, when room temperature is higher than set temperature, by increasing indoor expansion valve (41,51,61) aperture expands wet area to reduce the superheat region of indoor heat exchanger (42,52,62), on the other hand, increase the air quantity of indoor fan (43,53,63).

Description

Multi-type air-conditioning device

Technical field

The present invention relates to multi-type air-conditioning devices, in particular to have the multi-type air-conditioning device of multiple indoor units, described Indoor unit has the indoor heat exchanger that heat exchange can be carried out between air and refrigerant.

Background technique

In existing air-conditioning device, in refrigeration operation, in the lesser situation of refrigeration load, such as such as patent document In 1 (Japanese Unexamined Patent Application 59-122864 bulletin) it is recorded like that, exist by reduce compressor operating frequency carry out with The case where lesser refrigeration load consistent operating.In the following description, the operating frequency for reducing compressor will be passed through and compared Increase the superheat region of the indoor heat exchanger of indoor unit in usual refrigeration operation to corresponding with lesser refrigeration load The operating that ground reduces refrigerating capacity is referred to as capabilities refrigeration operation.As recorded in Patent Document 1 like that, in an outdoor unit In the case where being connect with an indoor unit, even if the room temperature of such as indoor unit becomes in capabilities refrigeration operation Change, the operating frequency of compressor can be changed according to the requirement of indoor unit also to be easy to carry out reply.

But for example, in the multi-type air-conditioning that an outdoor unit is connect with multiple indoor units, multiple indoor units operate parallel In device, it is difficult to change the operating frequency of the compressor of outdoor unit according to the requirement of any indoor unit.Therefore, in multi-type sky In any indoor unit for adjusting device, for example, when room temperature change or set temperature is changed and any indoor unit is wanted When variation has occurred in the refrigerating capacity asked, it may be considered that by changing the swollen of the indoor unit for requiring refrigerating capacity to be changed The aperture of swollen valve copes with the refrigeration load changed.

Summary of the invention

Subject to be solved by the invention

However, when in multi-type air-conditioning device carry out capabilities refrigeration operation when be intended to by increase expansion valve aperture come In the case where improving refrigerating capacity, exist since the air of the superheat region and wet area that pass through indoor heat exchanger respectively is mixed The case where closing and generating moisture condensation on the rotor of fan indoors.

Project of the invention is turn that fan indoors is prevented when multi-type air-conditioning device carries out capabilities refrigeration operation Moisture condensation is generated on son.

Means for solving the problems

The multi-type air-conditioning device of 1st viewpoint of the invention is configured to, and has: outdoor unit, which has compressor, The compressor compresses the refrigerant recycled to carry out refrigerating cycle；With multiple indoor units, multiple interior equipment There are multiple indoor heat exchangers and multiple mechanisms of decompressor, and there are multiple indoor fans, wherein the refrigeration being discharged from compressor Agent is recycled in the multiple indoor heat exchanger, is passed through by the air after multiple indoor heat exchangers described more A indoor fan, at least one indoor unit in multiple indoor units are configured to, and are increasing overheat compared to usual refrigeration operation In the capabilities refrigeration operation in region, when room temperature is higher than set temperature, reduced by increasing the aperture of the mechanism of decompressor The superheat region of indoor heat exchanger and expand wet area, on the other hand, increase the air quantity of indoor fan.

According to the multi-type air-conditioning device, the aperture by increasing the mechanism of decompressor expands the moist area of indoor heat exchanger Domain, so that refrigerating capacity improves, on the other hand, when wet area expands, by the superheat region for having passed through indoor heat exchanger Air and the temperature of the mixing air formed by the mixing of the air of wet area reduce.Here, the mechanism of decompressor is opened The control of degree is inhibited with being limited in the mode within the upper limit for not generating moisture condensation in the device at the downstream of heat exchanger indoors The expansion of wet area so that the temperature of mixing air will not excessively be reduced to the dew-point temperature of mixing air or less and indoors Moisture condensation in the downstream generation device of heat exchanger, the raising for further refrigerating capacity, then by increasing indoor fan Air quantity ensures required refrigerating capacity.As a result, when multi-type air-conditioning device carries out capabilities refrigeration operation, it can ensure Moisture condensation in the downstream generation device of heat exchanger indoors is prevented while required refrigerating capacity.

The multi-type air-conditioning device of 2nd viewpoint of the invention is configured to, on the basis of the multi-type air-conditioning device of the 1st viewpoint On, at least one indoor unit is configured to, and in capabilities refrigeration operation, when room temperature is lower than set temperature, can pass through Reduce the aperture of the mechanism of decompressor and/or reduces the air quantity of indoor fan to reduce refrigerating capacity.

According to the multi-type air-conditioning device, in the capabilities refrigeration operation in refrigeration, when room temperature is lower than set temperature, Refrigerating capacity is reduced by reducing the aperture of the mechanism of decompressor and/or reducing the air quantity of indoor fan, therefore, from wet area Expand the state being limited within the upper limit that the downstream of heat exchanger indoors does not condense in generation device and reduces wet area And/or air quantity is reduced.

Base of the multi-type air-conditioning device of 3rd viewpoint of the invention in the 1st viewpoint or the multi-type air-conditioning device of the 2nd viewpoint On plinth, at least one indoor unit in capabilities refrigeration operation using passed through the mixing air of wet area and superheat region into Row freezes, and the downstream wet area of heat exchanger indoors is determined using the temperature of mixing air or the humidity of mixing air Expansion be limited within the upper limit that will not be condensed in generation device.

According to the multi-type air-conditioning device, can easily be determined using the temperature of mixing air or the humidity of mixing air Whether the expansion of the downstream wet area of heat exchanger indoors has been limited within the upper limit that will not be condensed in generation device.

Any one viewpoint of the multi-type air-conditioning device of 4th viewpoint of the invention in the 1st viewpoint into the 3rd viewpoint it is more On the basis of connection type air-conditioning device, at least one indoor unit also has indoor heat exchanger temperature sensing in heat exchanger indoors Device determines heat exchange indoors using the testing result of indoor heat exchanger temperature sensor in capabilities refrigeration operation The expansion of the downstream wet area of device has been limited within the upper limit that will not be condensed in generation device.

According to the multi-type air-conditioning device, can easily be sentenced using the testing result of indoor heat exchanger temperature sensor The expansion for being scheduled on the downstream wet area of indoor heat exchanger whether be limited in the upper limit that will not condense in generation device with It is interior.

Any one viewpoint of the multi-type air-conditioning device of 5th viewpoint of the invention in the 1st viewpoint into the 4th viewpoint it is more On the basis of connection type air-conditioning device, at least one indoor unit is in the wind for increasing indoor fan in order to obtain required refrigerating capacity Amount and the indoors downstream of heat exchanger the expansion of wet area can not be limited in the upper limit that will not condense in generation device with When interior, from the pattern switching of capabilities refrigeration operation to the mode of usual refrigeration operation.

According to the multi-type air-conditioning device, pass through the pattern switching from capabilities refrigeration operation to the mould of usual refrigeration operation Formula can make indoor heat exchanger integrally become wet area, therefore can eliminate the superheat region by indoor heat exchanger Air.

The effect of invention

In the multi-type air-conditioning device of the 1st viewpoint of the invention, when carrying out capabilities refrigeration operation, it can prevent Moisture condensation in the downstream generation device of indoor heat exchanger.

In the multi-type air-conditioning device of the 2nd viewpoint of the invention, can the downstream for maintaining indoor heat exchanger not Refrigerating capacity is reduced in the case where the state to condense in generation device.

In the multi-type air-conditioning device of the 3rd viewpoint or the 4th viewpoint of the invention, prevent at the downstream of indoor heat exchanger Device in condense reliability improve.

In the multi-type air-conditioning device of the 5th viewpoint of the invention, can while ensuring required refrigerating capacity Moisture condensation in the anti-locking apparatus in the downstream of indoor heat exchanger.

Detailed description of the invention

Fig. 1 is the loop diagram for showing the Sketch of multi-type air-conditioning device of embodiments of the present invention.

Fig. 2 is the cross-sectional view for showing an example of the structure of the indoor unit of multi-type air-conditioning device of Fig. 1.

Fig. 3 is front panel for unloading the indoor unit of Fig. 2 etc. and shows the perspective view of the structure around indoor heat exchanger.

Fig. 4 is the concept map for the indoor heat exchanger for illustrating the usual refrigeration operation of multi-type air-conditioning device.

Fig. 5 is the concept map for the indoor heat exchanger for illustrating the capabilities refrigeration operation of multi-type air-conditioning device.

Fig. 6 is the curve graph for the concept of control when illustrating capabilities refrigeration operation.

Fig. 7 is the curve graph for an example of control when illustrating capabilities refrigeration operation.

Fig. 8 is another curve graph for control when illustrating capabilities refrigeration operation.

Fig. 9 is the loop diagram for showing the Sketch of air-conditioning device of variation 1C of the invention.

Figure 10 is the perspective view for showing the appearance of outdoor unit of variation 1C.

Specific embodiment

(1) overall structure of air-conditioning device

Fig. 1 is the sketch structure figure of the multi-type air-conditioning device of an embodiment of the invention.Multi-type air-conditioning device 10 be the device for being used for the indoor cooling and warming in building etc. by carrying out the refrigerating cycle operating of steam compression type.It is multi-joint Type air-conditioning device 10 has: an outdoor unit 20 as heat source unit；More be connected in parallel with outdoor unit 20 are (in this implementation It is three in mode) as the indoor unit 40,50,60 for using unit；And as connection outdoor unit 20 and indoor unit 40,50, The liquid refrigerant connecting tube 71 and gas refrigerant connecting tube 72 of 60 connecting refrigerant lines.

The refrigerant circuit 11 of multi-type air-conditioning device 10 passes through connection outdoor unit 20, indoor unit 40,50,60, liquid system Cryogen connecting tube 71 and gas refrigerant connecting tube 72 and constitute.Refrigerant circuit 11 includes indoor refrigerant circuit 11a, 11b, 11c and outside refrigerant circuit 11d.Refrigerant recycles in refrigerant circuit 11.

In addition, multi-type air-conditioning device 10 has operation controller 80, it is empty which carries out multi-type Adjust the operating control that device 10 is whole.Indoor control device 47,57,67 and outside control device 37 are connected by transmission line 80a It connects and constitutes operation controller 80.Then, indoor unit 40,50,60 indoor control device 47,57,67 can be via biography Defeated line 80a carries out the exchange of control signal etc..

Operation controller 80 is connected to that suction pressure sensor 29, discharge pressure sensor 30, sucking can be received Temperature sensor 31, discharge temperature sensor 32, outdoor temperature sensor 36, hydraulic fluid side temperature sensor 44,54,64 and gas The detection signal of side temperature sensor 45,55,65 etc..In addition, operation controller 80 and compressor 21, four-way switching valve 22, The equal connection of outdoor fan 28, outdoor expansion valve 38, indoor expansion valve 41,51,61 and indoor fan 43,53,63, so as to root Detection signal according to them etc. controls outdoor unit 20 and indoor unit 40,50,60.

(2) detailed construction

(2-1) outdoor unit 20

There is outdoor unit 20 outside refrigerant circuit 11d, outside refrigerant circuit 11d to constitute refrigerant circuit 11 A part.Outside refrigerant circuit 11d and compressor 21, four-way switching valve 22, outdoor heat exchanger 23, outdoor expansion Valve 38 and liquid storage device 24 connect.

Compressor 21 is the compressor that running capacity can be made variable, and is the positive displacement compression driven by motor 21m Machine, the revolving speed of motor 21m is by inverter control.Four-way switching valve 22 is the valve for switching the flow direction of refrigerant.

In refrigeration operation, in the four-way switching valve 22 of Fig. 1, it is switched to by the connection status shown in solid line.That is, by Four-way switching valve 22 connects the discharge side of compressor 21 and outdoor heat exchanger 23, and by the suction side of compressor 21 (specifically, liquid storage device 24) and gas refrigerant connecting tube 72 connect, as a result, in refrigeration operation, outdoor heat exchange Device 23 is functioned as the radiator of the refrigerant compressed by compressor 21, and indoor heat-exchange device 42,52,62 is as in room The evaporator that the refrigerant of heat has been taken away in outer heat-exchanger 23 functions.

In heating operation, in the four-way switching valve 22 of Fig. 1, it is switched to connection status shown by dashed lines.By four Direction changeover valve 22 connects the discharge side of compressor 21 and 72 side of gas refrigerant connecting tube, and by the suction of compressor 21 Enter side and outdoor heat exchanger 23 connects, indoor heat-exchange device 42,52,62 by compressor 21 as being compressed as a result, The radiator of refrigerant functions, and outdoor heat exchanger 23 is used as heat-exchange device 42 indoors, has been taken away heat in 52,62 The evaporator of the refrigerant of amount functions.

Outdoor heat exchanger 23 is, for example, finned tube (fin and tube) type heat exchange of cross-piece (cross fin) formula Device, and be for carrying out the heat exchange between air and refrigerant using the equipment by air as heat source.Outdoor heat exchanger 23 gas side is connect with four-way switching valve 22, and the hydraulic fluid side of outdoor heat exchanger 23 is connect with outdoor expansion valve 38.

Outdoor expansion valve 38 be the refrigerant in the refrigerant circuit 11 when carrying out refrigeration operation flow direction on match Set the pressure or stream that the refrigerant flowed in the refrigerant circuit 11d of outside is carried out in the downstream side of outdoor heat exchanger 23 The electric expansion valve of the adjusting of amount etc..The outdoor expansion valve 38 is connect with the hydraulic fluid side of outdoor heat exchanger 23.

Outdoor unit 20 has the outdoor fan 28 as pressure fan, which is used for outdoor air inhalation machine It is interior, make it carry out being discharged to outdoor after heat exchange with refrigerant in outdoor heat exchanger 23.The outdoor fan 28 is can Make to supply the fan variable to the air quantity of the air of outdoor heat exchanger 23, the motor being e.g. made of DC fan motor etc. The propeller fan etc. of 28m driving.

For example, being equipped with such as lower sensor: suction pressure sensor 29 in outdoor unit 20, the sucking of compressor 21 is detected Pressure (that is, refrigerant pressure corresponding with evaporating pressure Pe when refrigeration operation)；Discharge pressure sensor 30, detection compression The discharge pressure of machine 21；Inlet temperature sensor 31 detects the inlet temperature of compressor 21；And discharge temperature sensor 32, detect the discharge temperature of compressor 21.In addition, the suction inlet in the outdoor air of outdoor unit 20 is sensed equipped with outdoor temperature Device 36, the outdoor temperature sensor 36 detect the temperature of the outdoor air in inflow machine.

In addition, outdoor unit 20 has outside control device 37, for controlling the movement of each section for constituting outdoor unit 20. The outside control device 37 has microcomputer (not shown), the memory being arranged to carry out the control of outdoor unit 20 (not shown) and the inverter circuit (not shown) etc. for controlling motor 21m.

Set temperature, setting humidity, room temperature and indoor humidity of multiple indoor units 40,50,60 etc. are different, Further, since they can change, accordingly, it is difficult to which the capacity adjusting that outdoor unit 20 is required is at each indoor unit of suitable whole 40,50,60.Thus, for example, outside control device 37 is according to requiring highest indoor unit in multiple indoor units 40,50,60 Running capacity and/or the outdoor of compressor 21 are controlled Deng the requirement of a part of indoor unit in, multiple indoor units 40,50,60 The air quantity of fan 28.Therefore, for for the majority in multiple indoor units 40,50,60, there are the running capacities of compressor 21 And/or the air quantity of outdoor fan 28 is set higher than required situation.

(2-2) indoor unit

The summary of (2-2-1) indoor unit

Indoor unit 40,50,60 by the medium mode of indoor ceiling or wall hanging that are embedded in or are suspended in building etc. indoors Wall surface on etc. modes be arranged in the room such as meeting room.Multiple indoor units 40,50,60 are configured sometimes in identical room In, it is also arranged respectively in different rooms sometimes.In addition, since indoor unit 40 and indoor unit 50,60 are configured to identical knot Therefore structure is below only illustrated the structure of indoor unit 40.About the structure of indoor unit 50,60, mark respectively 50 number sections or The label of 60 number sections replaces showing the label of 40 number sections of each section of indoor unit 40, and omits each portion of indoor unit 50,60 Explanation.

Indoor unit 40,50,60 connects via liquid refrigerant connecting tube 71 and gas refrigerant connecting tube 72 and outdoor unit 20 It connects.For example, it (is indoor refrigerant circuit 11b, interior in indoor unit 50 that outdoor unit 40, which has indoor refrigerant circuit 11a, It is indoor refrigerant circuit 11c in machine 60), indoor refrigerant circuit 11a constitutes a part of refrigerant circuit 11.It should Indoor refrigerant circuit 11a has the indoor expansion valve 41 and indoor heat exchanger 42 as the mechanism of decompressor.In addition, in this reality It applies in mode, indoors machine 40, indoor expansion valve 41,51,61 is respectively set in 50,60 as the mechanism of decompressor, but be not limited to This, can also be arranged in outdoor unit 20 also can be set and interior with indoor unit 40,50,60 corresponding multiple mechanisms of decompressor Machine 40,50,60 or the independent connection unit of outdoor unit 20.

Indoor expansion valve 41 is connect with the hydraulic fluid side of indoor heat exchanger 42 to carry out side refrigerant circuit 11a indoors The electric expansion valve of the flow adjusting of the refrigerant of interior flowing etc., additionally it is possible to cut off passing through for refrigerant.41 structure of indoor expansion valve It is controlled as by indoor control device 47, the adjustment for being able to carry out adjustment and the decompression of refrigerant flow by changing aperture.

Indoor heat exchanger 42 is the heat exchanger for carrying out the heat exchange between air and refrigerant, is for example by passing Finned tube (fin and tube) type heat exchanger of cross-piece (cross fin) formula that heat pipe and multiple fins are constituted.It is making When blowdown firing, indoor heat exchanger 42 functions as the evaporator of refrigerant and cools down room air, and in heating operation The radiator of Shi Zuowei refrigerant functions and heating indoor air.

Outdoor unit 40 has the indoor fan 43 as pressure fan, which is used for room air inhalation machine It is interior, heat exchange is carried out later using the room air after heat exchange as supply with refrigerant with it is made in heat exchanger 42 indoors Air is supplied to interior.Indoor fan 43 is can to make to supply to the air quantity of the air of indoor heat exchanger 42 in regulation air quantity model Interior variable fan is enclosed, centrifugal fan or multiple wing type fan of the motor 43m driving being e.g. made of DC fan motor etc. etc.. In indoor unit 40 shown in Fig. 2, it is used as indoor fan 43 using cross flow fan.

The detailed construction of (2-2-2) indoor unit

Fig. 2 shows the sections of indoor unit 40.Indoor unit 40 shown in Fig. 2 is the indoor unit of on-wall type.In Fig. 2, by double Arrow Ar1 shown in chain-dotted line indicates the flowing for the room air being inhaled into, and is blown by the arrow Ar2 expression shown in single dotted broken line The flowing of adjusting air out.Indoor unit 40 have shell 411 shown in Fig. 2, air filter 412, indoor heat exchanger 42, Indoor fan 43, vertical vane 416 and horizontal blade 417.Fig. 3 is the front side heat exchange department for showing indoor unit 40 shown in Fig. 2 421 and rear side heat exchange department 422 and surrounding structure perspective view.

There are the opening portion of shell 411, i.e. suction inlets 431 for the top of wall-mounted indoor unit 40 shown in Fig. 2.From sucking The room airs of 431 sucking of mouth enter sucking space S 1.The space in the downstream side of air filter 412 is also contained in sucking space In S1.The indoor humidity of the relative humidity of the indoor temperature transmitter 451 and measurement sucking air of the temperature of measurement sucking air Sensor 452 is for example arranged in the sucking space S 1.The temperature of the indoor temperature transmitter 451 measurement is room temperature Tr1, And inlet temperature Ti furthermore.

Position positioned at the upstream in the downstream and indoor fan 43 of indoor heat exchanger 42 is intermediate space S2.Also, What it is positioned at the downstream of indoor fan 43 is blowout space S 3.The room air being inhaled into above shell 411 from sucking space During S1 flow to intermediate space S2, temperature and humidity is adjusted by the indoor heat exchanger 42 in shell 411.It is intermediate The air of space S 2 when through indoor fan 43 be mixed become mixing air, mixing air by blow out space S 3 from The blow-off outlet 432 of lower section is blown out as air is adjusted.

(2-2-3) shell 411 and air filter 412

The outer profile and frame of indoor unit 40 are formed by the shell 411.By the rear guiding piece 433 and stabilizer of shell 411 434 form the blowout space S 3 as the blowout flow path being connected with blow-off outlet 432.Air filter 412 is configured in suction inlet 431 Between indoor heat exchanger 42.By before indoor heat exchanger 42, room air by air filter 412 thus Remove dust.Therefore, air filter 412 is installed on shell 411 in a manner of surrounding indoor heat exchanger 42.Due to The variation of the temperature and humidity of air will not occur for the front and back of air filter 412, therefore, here, by air filter 412 The space of front and back is handled as sucking space S 1 in an identical manner together.Therefore, indoor temperature transmitter 451 and interior The either side in the upstream, downstream of air filter 412 can be set in humidity sensor 452.

(2-2-4) indoor heat exchanger 42

Indoor heat exchanger 42 is made of front side heat exchange department 421 and rear side heat exchange department 422.Indoor heat exchanger 42 wraps Containing multiple fins 481 and multiple heat-transfer pipes 482.Each fin 481 is made of metal sheet, is configured to and adjacent fin 481 It is parallel and vertical with the length direction of indoor unit 40.Therefore, by the air of indoor heat exchanger 42 in wing adjacent to each other Pass through between piece 481.The pipe that multiple heat-transfer pipes 482 are made of metal respectively, and be component as follows: run through fin 481 extend along the length direction of indoor unit 40, for the refrigerant in internal flow and pass through fin 481 and heat-transfer pipe 482 Gap air between carry out heat exchange.Refrigerant and air carry out hot friendship via most fins 481 and most heat-transfer pipes 482 It changes.In addition, being attached on fin 481 and heat-transfer pipe 482 and making the moisture in room air condense, thus, it is possible to utilize room Inside heat exchanger 42 dehumidifies.Front side heat exchange department 421 includes upper front heat exchange department 426 and lower front side heat exchange department 427, wherein the upper front heat exchange department 426 is towards front side inclined downward, and the lower front side heat exchange department 427 is from upper The lower end of heat exchange department 426 is towards rear side inclined downward on front side of portion.Rear side heat exchange department 422 is towards rear side inclined downward.

In this embodiment, to simplify the explanation, to the heat-transfer pipe 482 of indoor heat exchanger 42 be one column the case where into Row explanation.But it is possible to the case where being not limited to a column using the arrangement of the heat-transfer pipe 482 of indoor heat exchanger 42 of the invention, It is also possible to two column or more.Be illustrated in addition, being set as following situations: in refrigeration operation, refrigerant is handed over from lower front side heat The heat-transfer pipe 483 for changing the most next stage in portion 427 enters, also, refrigerant is from the heat transfer of the most next stage of rear side heat exchange department 422 Pipe 484 flows out.Also, although heat-transfer pipe 482 at different levels is connect with another grade of heat-transfer pipe 482, heat-transfer pipe not at the same level 482 U-tube 485 each other for example as shown in Figure 3 connects.In the indoor heat exchanger 42, refrigerant successively flows To adjacent heat-transfer pipe 482.

(2-2-5) indoor fan 43

Indoor fan 43 is between front side heat exchange department 421 and rear side heat exchange department 422 and blow-off outlet 432.Indoor wind Fan 43 has the cylinder-shaped fan propeller 43a extended longlyer on the length direction of machine 40 indoors and revolves fan propeller 43a The motor 43m turned.Fan propeller 43a is made of the multiple fan wings circumferentially arranged, also, in Fig. 2, fan propeller 43a It is rotated clockwise around central point O.It is generated and being rotated centered on central point O from front side heat exchange department 421 and the friendship of rear side heat Change portion 422 towards blow-off outlet 432 air flowing.Run through fan propeller 43a towards the flowing of the air of blow-off outlet 432.Cause This generates moisture condensation when fan propeller 43a becomes less than the temperature of the dew-point temperature of mixing air (adjusting air).In other words It says, at this point, the downstream of heat exchanger 42 generates fan propeller moisture condensation indoors.The rotation of the indoor fan 43 is controlled by indoor Device 47 controls, and can change air quantity according to the instruction from indoor control device 47.

(2-2-6) vertical vane 416 and horizontal blade 417

The configuration of vertical vane 416 is in the blowout flow path as blowout space S 3.Vertical vane 416 passes through stepper motor (not shown) and rotate, adjust indoor unit 40 length direction on wind direction.Horizontal blade 417 is configured along blow-off outlet 432, is led to It crosses stepper motor (not shown) and rotates, adjust the wind direction in up and down direction.Vertical vane 416 and horizontal blade 417 are becoming Lower than the dew-point temperature of mixing air temperature when also generate moisture condensation.Such also downstream with heat exchanger 42 indoors that condenses The fan propeller moisture condensation of generation is corresponding.

The indoor (2-2-7) control device 47 and various sensors

Indoor control device 47 is accommodated in the electric part box (not shown) being set to inside shell 411.Indoor Control device 47 for example according to the instruction being stored in memory (not shown) and from remote controler (not shown) instruction come into The control of row indoor unit 40.

Indoors in machine 40, other than above-mentioned indoor temperature transmitter 451 and indoor humidity sensor 452, it is additionally provided with Various sensors are still omitted here the record for illustrating unessential sensor.The liquid of heat exchanger 42 indoors Side is equipped with hydraulic fluid side temperature sensor 44, the hydraulic fluid side temperature sensor 44 detect refrigerant temperature (with when refrigeration operation The corresponding refrigerant temperature of evaporating temperature Te).In addition, the gas side of heat exchanger 42 is equipped with the temperature of detection refrigerant indoors Gas side temperature sensor 45.Blowout temperature sensor 453, the blowout temperature sensor 453 are equipped in blowout space S 3 The air themperature (temperature of mixing air) of measurement blowout space S 3.In addition, being equipped with blowout humidity sensor in blowout space S 3 Device 454, the air humidity (humidity of mixing air) of the blowout humidity sensor 454 measurement blowout space S 3.Hydraulic fluid side temperature Sensor 44, gas side temperature sensor 45, indoor temperature transmitter 451 and blowout temperature sensor 453 can be used for example Thermistor.

(3) movement of air-conditioning device

In multi-type air-conditioning device 10, in refrigeration operation and heating operation, user is filled using inputs such as remote controlers It sets and room temperature control is carried out to each indoor unit 40,50,60, room temperature control makes room temperature Tr1, Tr2, and Tr3 is close To set temperature Ts1, Ts2 that each indoor unit 40,50,60 is independently set, Ts3.In room temperature control, work as interior When fan 43,53,63 is set to air quantity automatic mode, the air quantity of indoor fan 43 and the aperture of indoor expansion valve 41 are adjusted To make room temperature Tr1 be converged in set temperature Ts1, the air quantity of indoor fan 53 and the aperture of indoor expansion valve 51 are adjusted To make room temperature Tr2 be converged in set temperature Ts2, the air quantity of indoor fan 63 and the aperture of indoor expansion valve 61 are adjusted To make room temperature Tr3 be converged in set temperature Ts3.In capabilities cooling operation pattern, indoor fan 43,53,63 Air quantity is by 80 adjust automatically of operation controller.

For purposes of the invention it is important that capabilities refrigeration operation, since heating operation can be and existing identical knot Structure, therefore be illustrated in the following contents specifically for refrigeration operation.Multi-type air-conditioning device 10 is configured to, in refrigeration operation When, other than usual refrigerant operation mode, refrigeration operation can also be carried out under capabilities cooling operation pattern.Usually system Blowdown firing mode is to carry out the mode of usual refrigeration operation, and capabilities cooling operation pattern is the mould for carrying out capabilities refrigeration operation Formula.Capabilities refrigeration operation is to increase the superheat region of indoor heat exchanger 42 compared to usual refrigeration operation and utilize mixing The refrigeration operation that air freezes, the mixing air are will to have passed through the air of superheat region and passed through wet area The air of air mixing and formation.

(3-1) refrigeration operation

When refrigeration operation, four-way switching valve 22 be in by the state shown in solid of Fig. 1, i.e. the discharge side of compressor 21 and The gas side of outdoor heat exchanger 23 connects and the suction side of compressor 21 is via gas refrigerant connecting tube 72 and Indoor Thermal The state of the gas side connection of exchanger 42,52,62.In this case, outdoor expansion valve 38 is in standard-sized sheet shape in refrigeration operation State.The aperture for adjusting indoor expansion valve 41, so that the outlet (that is, gas side of indoor heat exchanger 42) of indoor heat exchanger 42 The degree of superheat SH1 of the refrigerant at place becomes target superheat degree SHt1, adjusts the aperture of indoor expansion valve 51, so that indoor heat exchange The degree of superheat SH2 of refrigerant at the outlet (that is, gas side of indoor heat exchanger 52) of device 52 is at target superheat degree SHt2 Become constant, adjust the aperture of indoor expansion valve 61, so that the outlet of indoor heat exchanger 62 is (that is, indoor heat exchanger 62 Gas side) at refrigerant degree of superheat SH3 become target superheat degree SHt3.

In addition, target superheat degree SHt1, SHt2, SHt3 are set to optimum temperature value within the scope of the defined degree of superheat, So that room temperature Tr1, Tr2, Tr3 are converged in set temperature Ts1, Ts2, Ts3.Detect each Indoor Thermal respectively in the following way The degree of superheat SH1, SH2, the SH3 of the refrigerant in the exit of exchanger 42,52,62, for example, from by each gas side temperature sensor The refrigerant detected by each hydraulic fluid side temperature sensor 44,54,64 is subtracted in 45,55, the 65 refrigerant temperature values detected Temperature value (corresponding with evaporating temperature Te).But the degree of superheat of the refrigerant in the exit of each indoor heat exchanger 42,52,62 SH1, SH2, SH3 are not limited to be detected using the above method.

Operate compressor 21, outdoor fan 28 and indoor fan 43,53,63 in the state of in refrigerant circuit 11 When, the gas refrigerant of low pressure is inhaled into compressor 21 and is become the gas refrigerant of high pressure by compression.Then, the gas of high pressure Cryogen is sent to outdoor heat exchanger 23 via four-way switching valve 22, carries out with the outdoor air supplied by outdoor fan 28 Heat exchange and radiate, become the liquid refrigerant of high pressure.Then, the liquid refrigerant of the high pressure is via liquid refrigerant connecting tube 71 are sent to indoor unit 40,50,60.

The liquid refrigerant for being sent to the high pressure of the indoor unit 40,50,60 is depressurized by indoor expansion valve 41,51,61 respectively To the suction pressure close to compressor 21, becomes the refrigerant of the gas-liquid two-phase state of low pressure and be sent to indoor heat exchanger 42,52,62, heat exchanger 42 indoors carry out heat exchange with room air respectively and evaporate in 52,62, become the gas of low pressure Cryogen.

The gas refrigerant of the low pressure is sent to outdoor unit 20 via gas refrigerant connecting tube 72, via four-way switching valve 22 flow into liquid storage device 24.Then, the gas refrigerant for flowing into the low pressure of liquid storage device 24 is again sucked into compressor 21.In this way, In multi-type air-conditioning device 10, refrigeration operation as follows can be carried out: making outdoor heat exchanger 23 as in compressor 21 In the radiator of compressed refrigerant function, and make indoor heat exchanger 42,52,62 as in outdoor heat exchanger Pass through the evaporator of liquid refrigerant connecting tube 71 and the transported refrigerant of indoor expansion valve 41,51,61 in 23 after condensation It functions.In addition, in multi-type air-conditioning device 10, due to machine 40 indoors, not in room in 50,60 each indoor unit The mechanism of the pressure of the gas side adjustment refrigerant of inside heat exchanger 42,52,62, therefore, whole indoor heat exchangers 42,52, Evaporating pressure Pe in 62 is common pressure.

(3-2) usually refrigeration operation and capabilities refrigeration operation

In usual refrigeration operation, as shown in figure 4, the substantial all parts of indoor heat exchanger 42 are wet area 491 (region that description has oblique line).In contrast, in capabilities refrigeration operation, as shown in figure 5, from closest to refrigerant inlet The 4th grade of lower number of the heat-transfer pipe 483 of the most next stage of lower front side heat exchange department 427 to upper front heat exchange department 426 conducts heat Pipe 486 is wet area 491 (region that description has oblique line).But it is passed from the 5th grade of the lower number of upper front heat exchange department 426 Heat pipe 487 to rear side heat exchange department 422 most next stage heat-transfer pipe 484 be superheat region 492 (region for not describing oblique line). In the following description, which is also sometimes referred to as arid region.In addition, in usual refrigeration operation, in order to obtain Higher refrigerating capacity, substantially generally wet area 491, still, due to the relationship of crossing thermal control, there is also close to interior The part of the outlet of heat exchanger 42 becomes the case where superheat region (arid region).

The refrigerant of gas-liquid two-phase state flows in wet area 491, and the refrigerant of gaseous state is in superheat region 492 Middle flowing.Therefore, superheat region has been passed through almost without the heat exchange between refrigerant and air in superheat region 492 The temperature of 492 air and the temperature of the air before passing through are substantially the same.

When capabilities cooling operation pattern is selected, the aperture of indoor expansion valve 41 is adjusted using operation controller 80 With the air quantity of indoor fan 43, the capabilities refrigeration operation under state shown in fig. 5 is carried out.In capabilities refrigeration operation, with The usual refrigeration operation that dew is removed in heat exchanger 42 indoors is compared, indoors in the device in the downstream of heat exchanger 42 It is easy to produce moisture condensation.Therefore, hereinafter, to being used to avoid the device in multi-type air-conditioning device 10 in capabilities refrigeration operation The control that moisture condensation is generated in interior, particularly machine 40 indoors machine is illustrated.

Control when (3-3) capabilities refrigeration operation

The summary of control when (3-3-1) capabilities refrigeration operation

Multiple arrows shown in fig. 5 conceptually illustrate sucking air Ar6, mixing air Ar7, wet area respectively and pass through Air Ar8 and superheat region pass through air Ar9.In capabilities refrigeration operation, when room temperature Tr1 is higher than set temperature Ts1 When, operation controller 80 is controlled, and expands tide by increasing the aperture of indoor expansion valve 41 to reduce superheat region 492 Wet zone 491.Here, the value of room temperature Tr1 is to suck the value of the inlet temperature Ti of air Ar6, by indoor temperature transmitter 451 measure and are sent to operation controller 80.

Since the wet area 491 that heat-exchange capacity is higher than superheat region 492 expands, so that the temperature of mixing air Ar7 It reduces, therefore, the aperture by increasing indoor expansion valve 41 operates indoor unit 40, and room temperature Tr1 can be made close to setting Temperature Ts1.However, in capabilities refrigeration operation, when excessively expanding wet area 491, it may occur that fan 43 indoors The state of moisture condensation is generated on fan propeller 43a.

Here, become to when excessively expanding wet area 491 in fan propeller using air line chart computational chart shown in fig. 6 The case where state of moisture condensation is generated on 43a is illustrated.In Fig. 6, RH100, RH90, RH80, RH70 are to show relatively respectively The curve of humidity 100%RH, 90%RH, 80%RH, 70%RH.If the inlet temperature for sucking air Ar6 is 27 DEG C, relative humidity When being about 85%RH, the point P1 of Fig. 6 is corresponding with the sucking state of air Ar6.If the evaporating temperature of indoor heat exchanger 42 is 7 DEG C when, obtain the point P2 of 7 DEG C of dry-bulb temperature and curve RH100 (saturated line) intersection.Also, set the straight line of tie point P1 He point P2 The intersection point of LN20 and curve RH100 is point P3.If the state of mixing air Ar7 is the range D1 of inlet point P1 to point P3 It is interior, then will not generate moisture condensation, still, if the state of mixing air Ar7 be inlet point P2 to point P3 range D2 in, can Generate moisture condensation.The size of wet area 491 when point P3 becomes the upper limit for not generating moisture condensation.It is no more than on this to control into Limit, the size of wet area 491 is determined using aftermentioned method etc..Then, aperture and the interior of indoor expansion valve 41 are adjusted The air quantity of fan 43, so that when the size (occupation rate of wet area 491) of the wet area 491 determined is no more than point P3 The size of wet area 491.If the wet area of the occupation rate points of proximity P3 of the wet area 491 in capabilities refrigeration operation 491 occupation rate is then controlled by way of improving refrigerating capacity increasing the air quantity of indoor fan 43, without opening The aperture of indoor expansion valve 41.

In the following contents, is shown in (3-4) and moist area is determined by the temperature or humidity for measuring mixing air Ar7 The size in domain 491 is shown in (3-5) come the control for avoiding fan propeller from condensing carried out by using more than two interiors The testing result of heat-exchanger temperature sensor 455 and determine the size of wet area 491 to carry out avoid fan propeller knot The control of dew.

In addition, in capabilities refrigeration operation, it is indoor swollen by reducing when room temperature Tr1 is lower than set temperature Ts1 The aperture of swollen valve 41 and/or the air quantity of indoor fan 43 is reduced to reduce refrigerating capacity.In reply room temperature Tr1 lower than setting In the control of the case where temperature Ts1, due to changing to be more difficult to generate the state of fan propeller moisture condensation, tide also can be omitted The judgement of the size of wet zone 491.

It avoids controlling when (3-4) capabilities refrigeration operation

The summary for the control that (3-4-1) avoids fan propeller from condensing

Multiple arrows shown in fig. 5 conceptually illustrate sucking air Ar6, mixing air Ar7, wet area respectively and pass through Air Ar8 and superheat region pass through air Ar9.In capabilities refrigeration operation, operation controller 80 uses mixing air Ar7 Temperature determine the size of wet area 491, and controlled, so that the temperature of mixing air Ar7 is more than mixing air Ar7 Dew-point temperature and prevent become indoors heat exchanger 42 downstream generate fan propeller moisture condensation situation.In more detail, Sentenced using the inlet temperature of sucking air Ar6 and sucking humidity (relative humidity), the temperature of mixing air Ar7 and evaporating temperature Determine the size of wet area 491, and is controlled according to the judgement result of the size of wet area 491.Wet area 491 it is big Small (area of wet area 491) is for example by ((area of the wet area 491)+(overheated zone (area of wet area 491) ÷ The area in domain 492)) × 100 (occupation rates of=wet area 491) quantify.I.e., it is possible to by calculating wet area 491 Occupation rate determines the size of wet area 491.It will be described in detail the control of operation controller below, that is, by calculating tide The occupation rate of wet zone 491 come prevent become indoors heat exchanger 42 downstream generate fan propeller moisture condensation situation.

The calculating in control that (3-4-2) avoids fan propeller from condensing

In the following description, the inlet temperature for sucking air Ar6 is represented as Ti DEG C, sucks the sucking humidity of air Ar6 It is represented as Hi%RH.The temperature of mixing air Ar7 is represented as Tm DEG C, and the absolute humidity of mixing air Ar7 is represented as Xmkg/kgDA.Wet area is represented as Tw DEG C by the air themperature of air Ar8, and wet area is absolute by air Ar8's Humidity is represented as Xmkg/kgDA.Superheat region is represented as Td DEG C by the air themperature of air Ar9, and superheat region passes through The absolute humidity of air Ar9 is represented as Xdmkg/kgDA.However, it is possible to set the air themperature that superheat region passes through air Ar9 Td DEG C is equal to Ti DEG C of inlet temperature, replaces Td to indicate using Ti.Even if replacing in this way, precision also hardly changes, passes through It replaces in this way, it is convenient to omit pass through Td DEG C of air themperature of the temperature sensor of air Ar9 for measuring superheat region.

Information related with the by-path factor BF of indoor heat exchanger 42 is stored in for example internal by operation controller 80 In memory.By-path factor BF is found out in advance using experiment or simulation, the value found out is input into operation controller 80.Fortune Rotation control apparatus 80 is configured to, when carrying out capabilities refrigeration operation avoid fan propeller condense control when, can be from example As required by-path factor BF is read and obtained in internal storage.

As being explained, the inlet temperature of sucking air Ar6 is detected by indoor temperature transmitter 451 Ti.Operation controller 80 obtains the inlet temperature Ti detected by indoor temperature transmitter 451 from indoor temperature transmitter 451 Value.

Te DEG C of evaporating temperature of indoor heat exchanger 42 is detected by hydraulic fluid side temperature sensor 44.Operation controller 80 The value of the evaporating temperature Te detected by hydraulic fluid side temperature sensor 44 is obtained from hydraulic fluid side temperature sensor 44.

Tm DEG C of temperature of mixing air Ar7 is detected by blowout temperature sensor 453.Operation controller 80 is from hydraulic fluid side Temperature sensor 44 obtains the value of the temperature Tm of the mixing air Ar7 detected by blowout temperature sensor 453.

Operation controller 80 calculates the value for having passed through the air themperature Tw of wet area 491 using following formula (1).Operating Control device 80 can obtain the value for having passed through the air themperature Tw of wet area 491 using the calculating of the formula (1).

Tw=(Ti-Te) × BF+Te (1).

Operation controller 80 calculates the value of the occupation rate Rw% of wet area 491 using following formula (2).Operating control dress The value of occupation rate Rw of wet area 491 can be obtained using the calculating of the formula (2) by setting 80.

Rw=(Tm-Ti)/(Tw-Ti) (2).

Operation controller 80 uses the result for utilizing aftermentioned calculating to find out using the occupation rate Rw of wet area 491 It is controlled, the temperature Tm of mixing air Ar7 is made to be not less than the dew-point temperature Tp of mixing air Ar7, so that hot indoors The downstream of exchanger 42 will not generate fan propeller moisture condensation.That is, operation controller 80 uses mixed in capabilities refrigeration operation The temperature Tm of air Ar7 is closed to determine the size of wet area 491, and is controlled, so that the temperature Tm of mixing air Ar7 is super Cross the dew-point temperature Tp of mixing air Ar7 to will not the downstream of heat exchanger 42 indoors generate fan propeller moisture condensation.

Next, to the temperature Tm and mixing air Ar7 that use the occupation rate Rw of wet area 491 to seek mixing air Ar7 Dew-point temperature Tp between the method for relationship be illustrated.

The sucking humidity Hi of sucking air Ar6 is detected by indoor humidity sensor 452.Operation controller 80 is from interior Humidity sensor 452 obtains the value of the sucking humidity Hi detected by indoor humidity sensor 452.

In the case where asking the function of absolute humidity to be represented as fx as parameter dry-bulb temperature and relative humidity, operating Control device 80 calculates the value for having passed through the absolute humidity Xd of air of superheat region 492 using following formula (3).Operating control dress The value of absolute humidity Xd can be obtained using the calculating of the formula (3) by setting 80.Function fx is, for example, to utilize calculation formula to air line Figure computational chart carries out what approximation obtained.

Xd=fx (Ti, Hi) (3).

Operation controller 80 calculates the absolute humidity Xw's for having passed through the air of wet area 491 using following formula (4) Value.Operation controller 80 can obtain the value of the occupation rate Rw of wet area 491 using the calculating of the formula (4).

Xw=(Xd-fx (Te, 100)) × BF+fx (Te, 100) (4).

Operation controller 80 calculates the value of the absolute humidity Xm of mixing air Ar7 using following formula (5).Operating control dress The value of absolute humidity Xm of mixing air Ar7 can be obtained using the calculating of the formula (5) by setting 80.

Xm=Rw × Xw+ (1-Rw) × Xd (5).

In the case where asking the function of dew-point temperature to be represented as fp as parameter dry-bulb temperature and relative humidity, operating Control device 80 calculates the value of the dew-point temperature Tp of mixing air Ar7 using following formula (6).Function fp is, for example, public using calculating Formula carries out what approximation obtained to air line chart computational chart.Operation controller 80 can obtain mixing using the calculating of the formula (6) The value of the dew-point temperature Tp of air Ar7.

Tp=fp (Tm, Xm) (6).

Operation controller 80 carries out control as follows: being not less than the temperature Tm of mixing air Ar7 and is found out according to (6) formula The dew-point temperature Tp of mixing air Ar7, so that the downstream of heat exchanger 42 will not generate fan propeller moisture condensation indoors.

The equipment that (3-4-3) is used to avoid fan propeller moisture condensation when capabilities refrigeration operation controls

It is counted using according to the size (occupation rate of wet area) for the wet area for using above-mentioned formula (1) to formula (6) to find out The calculated result of calculating control for the equipment for avoiding fan propeller moisture condensation when capabilities refrigeration operation.For example, operating Temperature Tm (temperature that by blowout temperature sensor 453 is detected) and use of the control device 80 by comparing mixing air Ar7 The dew-point temperature Tp of the mixing air Ar7 that above-mentioned formula (1) to formula (6) is found out controls indoor expansion valve 41 and/or indoor fan 43。

Fig. 7 shows the fan of evaporating temperature, inlet temperature and the temperature about mixing air found out according to inlet temperature The margin line of rotor moisture condensation.Curve graph shown in Fig. 7 is to carry out schematization to the relationship for using above-mentioned formula (1) to formula (6) to find out Obtained figure.Margin line LN1, LN2, LN3, LN4 respectively be sucking humidity Hi be 85%RH when, when 80%RH, when 70%RH and Margin line when 60%RH.If the temperature Tm of mixing air Ar7 is higher than these margin lines LN1~LN4, knot will not be generated Dew.For opposite, if the temperature Tm of mixing air Ar7 is lower than these margin lines, moisture condensation can be generated.

Using known to Fig. 7: for example, sucking humidity Hi is 80%RH, then by making if evaporating temperature Te is about 7 DEG C The temperature Tm of mixing air Ar7 is higher than about 17 DEG C, can be avoided fan propeller moisture condensation.In other words, margin line LN1~ The dew-point temperature Tp of mixing air Ar7 under the conditions of LN4 expression is each.

Evaporating temperature Te is about 7 DEG C, sucking humidity Hi is 80%RH, the dew-point temperature Tp of mixing air Ar7 is big Under above-mentioned condition as about 17 DEG C, operation controller 80 operates indoor unit 40, and makes indoor unit 40 in the operating of Fig. 7 It is operated at point OP1.In this case, do not have to worry to generate fan propeller moisture condensation.In this case, if indoor unit The temperature Tm of the mixing air Ar7 of 40 operation point OP1 is higher than 17 DEG C, then can also carry out the control for continuing original operating, But in order to reliably fan propeller be avoided to condense, also, it is contemplated that even if the mixing air of the operation point OP1 of indoor unit 40 Temperature Tm be higher than 17 DEG C, also operating condition is changed to be more difficult to generate the operation point of fan propeller moisture condensation, so that mixing is empty The temperature Tm of gas will not due to environment or setting condition sharply variation and be lower than dew-point temperature Tp.

In addition, operation controller 80 is also configured to, for example, ought under the above conditions evaporating temperature Te about 7 DEG C and sucking humidity Hi when not changing at 80%RH, as the temperature Tm and margin line LN2 (dew-point temperature of mixing air Ar7 Tp it when temperature difference) is lower than 1 threshold value, is controlled, reduce the aperture of the indoor expansion valve 41 as the mechanism of decompressor and is made The air quantity of indoor fan 43 increases.For example, if setting the value of the 1st threshold value as 7 DEG C, as the mixing air Ar7 of operation point OP1 When temperature Tm becomes 23 DEG C, operation controller 80 judges (Tm-Tp) < 7 DEG C, to be controlled, reduces indoor expansion valve 41 Aperture and increase the air quantity of indoor fan 43.When operation controller 80 is controlled to reduce indoor expansion valve 41 When aperture, circulating mass of refrigerant is reduced and the superheat region 492 of indoor heat exchanger 42 becomes larger, therefore mixing can be prevented empty The reduction of the temperature Tm of gas, so as to the generation for inhibiting fan propeller to condense.Due to circulating mass of refrigerant reduction and cause The reduction of refrigerating capacity can be compensated by making the air quantity increase of indoor fan 43.

Operation controller 80 is also configured to, for example, at about 7 DEG C and ought inhale evaporating temperature Te under the above conditions When entering humidity Hi and not changing at 80%RH, when the temperature of the temperature Tm and margin line LN2 (dew-point temperature Tp) of mixing air Ar7 When degree difference is lower than 2 threshold value, is controlled, increase the air quantity of indoor fan 43.For example, if setting the value of the 2nd threshold value as 8 DEG C, then when the temperature Tm of the mixing air Ar7 of operation point OP1 becomes 24 DEG C, operation controller 80 judges (Tm-Tp) < 8 DEG C, to be controlled, increase the air quantity of indoor fan 43.When operation controller 80 is controlled such that indoor fan 43 Air quantity when increasing, air quantity increases to which refrigerating capacity improves, to become larger to the superheat region 492 of indoor heat exchanger 42 Direction change, therefore the reduction of the temperature Tm of mixing air Ar7 can be prevented, inhibit the generation of fan propeller moisture condensation.

In addition, operation controller 80 is also configured to, for example, ought under the above conditions evaporating temperature Te about 7 DEG C and sucking humidity Hi when not changing at 80%RH, as the temperature Tm and margin line LN2 (dew-point temperature of mixing air Ar7 Tp when temperature difference) is lower than 3 threshold value, the mode from the pattern switching of capabilities refrigeration operation to usual refrigeration operation is carried out Control.For example, if setting the value of the 3rd threshold value as 0.5 DEG C, when the temperature Tm of the mixing air Ar7 of operation point OP1 becomes 17 DEG C When, operation controller 80 judges (Tm-Tp) < 0.5 DEG C, to be controlled, so that cutting from the mode of capabilities refrigeration operation Change to the mode of usual refrigeration operation.When operation controller 80 is controlled such that the pattern switching from capabilities refrigeration operation To usual refrigeration operation mode when, be state shown in Fig. 4 to can substantially make interior from state change shown in fig. 5 Heat exchanger 42 is whole to become wet area 491, therefore can eliminate the sky of the superheat region 492 by indoor heat exchanger 42 Gas, therefore can prevent fan propeller from condensing while ensuring required refrigerating capacity.

(3-4-4)

Curve graph shown in Fig. 8 is to carry out the figure that schematization obtains to the relationship for using above-mentioned formula (1) to formula (6) to find out. Margin line LN11, LN12, LN13, LN14 are sucking humidity Hi respectively when being 85%RH, when 80%RH, when 70%RH and 60%RH When margin line.If the occupation rate Rw of wet area 491 is less than these margin lines LN11~LN14, moisture condensation will not be generated. , whereas if the occupation rate Rw of wet area 491 is greater than these margin lines LN11~LN14, then moisture condensation can be generated.

Using known to Fig. 8: for example, sucking humidity Hi is 80%RH, then by making if evaporating temperature Te is about 7 DEG C The occupation rate Rw of wet area 491 is less than about 50%, can be avoided fan propeller moisture condensation.

In the boundary for the wet area 491 that evaporating temperature Te is about 7 DEG C, sucking humidity Hi is 80%RH, generation condenses Occupation rate Rmw is about under above-mentioned condition as 50%, and operation controller 80 operates indoor unit 40, and makes indoor unit 40 operate at the operation point OP2 of Fig. 8.In this case, do not have to worry to generate fan propeller moisture condensation.In such situation Under, if the occupation rate Rw of the wet area 491 of the operation point OP2 of indoor unit 40 less than 50%, can also carry out continuing original The control of the operating come, still, in order to reliably fan propeller be avoided to condense, also, it is contemplated that even if the operating of indoor unit 40 Operating condition is also changed to the operation point for being more difficult to generate fan propeller moisture condensation less than 50% by the occupation rate Rw of point OP2.

Operation controller 80 is also configured to, for example, at about 7 DEG C and ought inhale evaporating temperature Te under the above conditions When entering humidity Hi and not changing at 80%RH, when the difference of the occupation rate Rw and margin line LN12 of wet area 491 are lower than the 4th threshold It when value, is controlled, reduces the aperture of the indoor expansion valve 41 as the mechanism of decompressor, and increase the air quantity of indoor fan 43 Add.For example, if setting the value of the 4th threshold value as 15%, when the occupation rate Rw of the wet area 491 of operation point OP2 becomes 40% When, operation controller 80 judges (Rmw-Rw) < 15, to reduce the control of the aperture of indoor expansion valve 41, and makes The air quantity of indoor fan 43 increases.Due to circulating mass of refrigerant reduction caused by the reduction of refrigerating capacity can be by making room The air quantity increase of internal fan 43 compensates.

In addition, operation controller 80 is also configured to, for example, ought under the above conditions evaporating temperature Te about 7 DEG C and sucking humidity Hi when not changing at 80%RH, when the difference of occupation rate Rw and margin line LN12 of wet area 491 are low When 5 threshold value, carry out making the increased control of the air quantity of indoor fan 43.For example, if setting the value of the 5th threshold value as 25%, When the occupation rate Rw of the wet area 491 of operation point OP2 becomes 30%, operation controller 80 judges (Rmw-Rw) < 25%, to carry out making the increased control of the air quantity of indoor fan 43.

In addition, operation controller 80 is also configured to, for example, ought under the above conditions evaporating temperature Te about 7 DEG C and sucking humidity Hi when not changing at 80%RH, when the difference of occupation rate Rw and margin line LN12 of wet area 491 are low When 6 threshold value, the control of the mode from the pattern switching of capabilities refrigeration operation to usual refrigeration operation is carried out.For example, such as Fruit sets the value of the 6th threshold value as 1%, then when the occupation rate Rw of the wet area 491 of operation point OP2 becomes 50%, operating control Device 80 judges (Rmw-Rm) < 1%, to carry out from the pattern switching of capabilities refrigeration operation to the mould of usual refrigeration operation The control of formula.

(3-4-5)

In above-mentioned control, it is illustrated control as follows for what operation controller 80 carried out: compared to usual Refrigeration operation increases in the capabilities refrigeration operation of the superheat region 492 of indoor heat exchanger 42, using inlet temperature Ti, inhales Enter humidity Hi, the temperature Tm of mixing air Ar7 and evaporating temperature Te and avoids fan propeller as shown in Figure 7 to carry out use example The control of moisture condensation, being made and making the temperature Tm of mixing air Ar7 be more than the dew-point temperature Tp of mixing air will not be indoors The downstream of heat exchanger 42 generates fan propeller moisture condensation.But operation controller 80 can also carry out control as follows: use suction Enter temperature Ti, sucking humidity Hi, the humidity of mixing air Ar7 and evaporating temperature Te to replace inlet temperature Ti, sucking humidity Hi, mix The temperature Tm and evaporating temperature Te of air Ar7 is closed to carry out the control for avoiding fan propeller from condensing, by making mixing air Ar7's Humidity be more than mixing air saturated humidity so that will not indoors heat exchanger 42 downstream generate fan propeller moisture condensation.Cause This, for example, as shown in Fig. 2, setting humidity sensor 454 can also be blown out in blowout space S 3.

The control for avoiding fan propeller from condensing when (3-5) capabilities refrigeration operation

The summary for the control that (3-5-1) avoids fan propeller from condensing

In capabilities refrigeration operation, operation controller 80 uses more than two indoor heat exchanger temperature sensors 455 testing result determines the size of wet area 491, is controlled, by the temperature for making mixing air Ar7 shown in fig. 5 Degree is more than that the dew-point temperature of mixing air Ar7 condenses to prevent the downstream for becoming heat exchanger 42 indoors from generating fan propeller Situation.In more detail, using the inlet temperature of sucking air Ar6 and sucking humidity (relative humidity) and evaporating temperature and two The testing result of a above indoor heat exchanger temperature sensor 455 determines the size of wet area 491, according to moist area The judgement result of the size in domain 491 is controlled.

Calculating in (3-5-2) operation controller 80

Operation controller 80 inputs the temperature of installed U-tube 485 from multiple indoor heat exchanger temperature sensors 455 Degree.The temperature of the U-tube 485 is the temperature of the refrigerant flowed in U-tube 485.The heat-transfer pipe 482 of wet area 491 Temperature is substantially the evaporating temperature Te for being used as the temperature of gas-liquid two-phase cold-producing medium.In contrast, the heat-transfer pipe of superheat region 492 482 temperature is higher than evaporating temperature Te.For example, it is assumed that there are 10 heat-transfer pipes 482, if there is 11 indoor heat exchanger temperature Sensor 455 is spent, then can be configured indoor heat exchanger temperature sensor 455 before and after each heat-transfer pipe 482.For example, In any heat-transfer pipe 482, it is configured to, if the detection of two before and after it indoor heat exchanger temperature sensor 455 There is the difference of height more than or equal to defined threshold value in temperature, then is determined as that until heat-transfer pipe 482 be wet area 491.For example, if the interior of the side close to the outlet of the 10th grade of heat-transfer pipe 482 close to the outlet of indoor heat exchanger 42 Heat-exchanger temperature sensor 455 detects evaporating temperature Te, then operation controller 80 is determined as occupying for wet area 491 Rate Rw is 100%.For example, if two indoor heat exchanger temperature sensors 455 at the both ends of the 6th grade of heat-transfer pipe 482 There is the difference of height more than or equal to defined threshold value in detection temperature, then is judged to until the 6th grade of heat-transfer pipe 482 being overheat Region 492, operation controller 80 can obtain the value that the occupation rate Rw of wet area 491 is 50%.

In addition, indoor heat exchanger temperature sensor 455 can be configured equably, can also concentrate on a part into Row configuration.For example, the indoor heat exchanger 42 due to Fig. 2 has 8 heat-transfer pipes 482 in upper front heat exchange department 426, Indoor heat exchanger temperature sensor can also be configured before and after 8 heat-transfer pipes 482 of these upper front heat exchange departments 426 455.In the case where being configured in this way, it can determine that occupation rate Rw is 50% in detail with less number of sensors Front and back.

Operation controller 80 is configured to, and can obtain and pass through Tw DEG C of the air themperature of wet area 491, passed through tide The absolute humidity Xwkg/kgDA of the air of wet zone 491 and passed through superheat region 492 air absolute humidity Xdkg/ The value of kgDA.For example, calculating of the operation controller 80 by progress aftermentioned formula (14), formula (15) and formula (16), Neng Gouqu Must pass through the air themperature Tw of wet area 491, the air for having passed through wet area 491 absolute humidity Xw and pass through The value of the absolute humidity Xd of the air of superheat region 492.

Operation controller 80 uses the moist area obtained from the testing result of indoor heat exchanger temperature sensor 455 The temperature Tm of the occupation rate Rw in domain 491 and acquired mixing air Ar7, passed through wet area 491 air it is absolute wet It spends Xw and has passed through the value of the absolute humidity Xd of the air of superheat region 492, mixing air Ar7 is found out according to following formula (11) Temperature Tm.

Tm=Rw × Tw+ (1-Rw) × Ti (11).

In addition, finding out the absolute humidity Xm of mixing air Ar7 according to following (12) formula.

Xm=Rw × Xw+ (1-Rw) × Xd (12).

Then, the value of the temperature Tm and absolute humidity Xm of the mixing air Ar7 found out using basis (11) formula and (12) formula, The dew-point temperature Tp of the mixing air is found out according to following (13) formula.Wherein, fp be using dry-bulb temperature and absolute humidity as Parameter seeks the function of dew-point temperature.Function fp is, for example, to carry out approximate obtain to air line chart computational chart using calculation formula.

Tp=fp (Tm, Xm) (13).

Operation controller 80 carries out control as follows: the result found out according to formula (13) being used to make mixing air Ar7's Temperature Tm is not less than the dew-point temperature Tp of mixing air Ar7, so that the downstream of heat exchanger 42 will not generate fan turn indoors Son moisture condensation.

Next, obtaining the temperature Tm of mixing air Ar7 to operation controller 80, having passed through the sky of wet area 491 It the absolute humidity Xw of gas and is illustrated by a mode of the value of the absolute humidity Xd of the air of superheat region 492. As being explained, operation controller 80 is configured to, and reads and obtains required from such as internal storage By-path factor BF obtains the value of the inlet temperature Ti detected by indoor temperature transmitter 451 from indoor temperature transmitter 451, The value that the sucking humidity Hi detected by indoor humidity sensor 452 is obtained from indoor humidity sensor 452, from hydraulic fluid side temperature Sensor 44 obtains the value of the evaporating temperature Te detected by hydraulic fluid side temperature sensor 44.

Operation controller 80 finds out the air themperature Tw for having passed through wet area 491 according to following formula (14).

Tw=(Ti-Te) × BF+Te (14).

In addition, operation controller 80 finds out the absolute wet of the air for having passed through superheat region 492 according to following formula (15) Spend Xd.Wherein, fx is the function that absolute humidity is sought using dry-bulb temperature and relative humidity as parameter.

Xd=fx (Ti, Hi) (15).

Using the absolute humidity Xd of the air for having passed through superheat region 492 found out according to formula (15), according to following formula (16) the absolute humidity Xw for having passed through the air of the wet area is found out.

Xw=(Xd-fx (Te, 100)) × BF+fx (Te, 100) (16).

Operation controller 80 can obtain mixing by the calculating of formula (14), formula (15) and formula (16) more than carrying out The temperature Tm of air Ar7, passed through wet area 491 air absolute humidity Xw and passed through the sky of superheat region 492 The value of the absolute humidity Xd of gas.

The equipment that (3-5-3) is used to avoid fan propeller moisture condensation when capabilities refrigeration operation controls

Fig. 7 shows the fan of evaporating temperature, inlet temperature and the temperature about mixing air found out according to inlet temperature The margin line of rotor moisture condensation.Curve graph shown in Fig. 7 is to carry out schema to the relationship for using above-mentioned formula (11) to formula (16) to find out Change obtained figure.Since the curve graph of Fig. 7 is to carry out schematization to the relationship for using above-mentioned formula (1) to formula (6) to find out to obtain Figure, therefore, with used the relationship for utilize above-mentioned formula (1) to formula (6) to find out above-mentioned " (3-4-3) is used to avoid capabilities It is same illustrated by the part of the equipment control of fan propeller moisture condensation when refrigeration operation ", it is able to use and utilizes above-mentioned formula (11) The relationship found out to formula (16) carries out the equipment control for fan propeller moisture condensation when avoiding capabilities refrigeration operation.

(3-5-4)

Curve graph shown in Fig. 8 is to carry out schematization to the relationship for using above-mentioned formula (11) to formula (16) to find out to obtain Figure.Since the curve graph of Fig. 8 is to carry out the figure that schematization obtains to the relationship for using above-mentioned formula (1) to formula (6) to find out, With used the relationship for utilizing above-mentioned formula (1) to formula (6) to find out above-mentioned " (3-4-4) is for avoiding capabilities refrigeration operation When fan propeller moisture condensation equipment control " part illustrated by it is same, be able to use using above-mentioned formula (11) to formula (16) The relationship found out carries out the equipment control for fan propeller moisture condensation when avoiding capabilities refrigeration operation.

(4) feature

(4-1)

As being illustrated above, in multi-type air-conditioning device 10, by increasing 41 (negative booster of indoor expansion valve The example of structure) aperture and expand the wet area 491 of indoor heat exchanger 42 so that refrigerating capacity improves, on the other hand, when When wet area 491 expands, by having passed through the air of the superheat region 492 of indoor heat exchanger 42 and having passed through wet area 491 air mixes and the temperature of the mixing air of formation reduces.Here, the aperture of indoor expansion valve 41 is controlled to be limited in The expansion that the mode within the upper limit of moisture condensation inhibits wet area 491 is not generated on fan propeller 43a, so that mixing air Ar7 Temperature Tm will not excessively be reduced to the dew-point temperature Tp or less of mixing air Ar7 and generate moisture condensation on fan propeller 43a, it is right In the raising of further refrigerating capacity, then ensure required refrigerating capacity by increasing the air quantity of indoor fan 43.It is tied Fruit can prevent when multi-type air-conditioning device 10 carries out capabilities refrigeration operation while ensuring required refrigerating capacity Moisture condensation is generated on the fan propeller 43a of fan 43 indoors.

(4-2)

In capabilities refrigeration operation in refrigeration, it is configured to, when room temperature Tr1 is lower than set temperature Ts1, passes through Reduce the aperture of indoor expansion valve 41 and/or reduces the air quantity of indoor fan 43 to reduce refrigerating capacity.Due to from wet area The state that 491 expansion is limited within the upper limit that will not generate moisture condensation on the fan propeller 43a of fan 43 indoors reduces Wet area 491 and/or air quantity are reduced, and therefore, system are reduced while capable of not generating moisture condensation on maintaining fan propeller 43a Cold energy power.At this moment, since operation controller 80 is without the control for avoiding fan propeller from condensing, it is able to suppress operating control The increase of the burden of device 80 processed.

(4-3)

As long as the blowout of the humidity of the temperature Tm or mixing air Ar7 of measurement mixing air Ar7 is arranged in machine 40 indoors Temperature sensor 453 or blowout humidity sensor 454, it will be able to use the temperature Tm or mixing air Ar7 of mixing air Ar7 Humidity determines the occupation rate Rw of wet area 491.As a result, it is possible to use the temperature Tm of mixing air Ar7 or mixing air The humidity of Ar7 easily determines whether the expansion of wet area 491 has been limited in will not generate moisture condensation on fan propeller 43a The upper limit within, thus improve fan propeller 43a prevent moisture condensation reliability.

(4-4)

As long as more than two indoor heat exchanger temperature sensors 455 are arranged in heat exchanger 42 indoors, it will be able to The occupation rate Rw of wet area 491 is determined using the testing result of indoor heat exchanger temperature sensor 455.As a result, energy The expansion of wet area 491 is enough easily determined using the testing result of more than two indoor heat exchanger temperature sensors 455 Whether it has been limited in and will not have been generated within the upper limit of moisture condensation on fan propeller 43a greatly, to improves the anti-of fan propeller 43a The reliability only to condense.

(4-5)

The air quantity for increasing indoor fan 43 to obtain required refrigerating capacity also can not be by the expansion of wet area When being limited within the upper limit for not generating moisture condensation on rotor, pass through the pattern switching from capabilities refrigeration operation to usual refrigeration fortune The mode turned can substantially make indoor heat exchanger 42 integrally become wet area.As a result, it is possible to eliminate to pass through Indoor Thermal The air of the superheat region 492 of exchanger 42, so as to prevent fan propeller 43a while ensuring required refrigerating capacity Moisture condensation.

(4-6)

In addition, multi-type air-conditioning device 10 can be described as following device, which is configured to have according to a viewpoint: Outdoor unit (20), the outdoor unit (20) have compressor (21), which recycles in order to carry out refrigerating cycle Refrigerant is compressed；With multiple indoor units (40,50,60), multiple indoor unit (40,50,60) is handed over multiple Indoor Thermals Parallel operation (42,52,62) and multiple mechanisms of decompressor (41,51,61,41a, 51a, 61a), and have multiple indoor fans (43, 53,63), wherein the refrigerant being discharged from the compressor is followed in the multiple indoor heat exchanger (42,52,62) Ring passes through the multiple indoor fan (43,53,63), the multiple room by the air after multiple indoor heat exchangers At least one indoor unit in interior machine is configured to, in the capabilities refrigeration fortune for increasing superheat region compared to usual refrigeration operation In turning, when room temperature is higher than set temperature, the indoor heat exchange is reduced by increasing the aperture of the mechanism of decompressor The superheat region of device and expand wet area, on the other hand, increase the air quantity of the indoor fan, can be by the humidity Within the upper limit that the downstream that the expansion in region is limited in the indoor heat exchanger will not condense in generation device.

(5) variation

(5-1) variation 1A

In the above-described embodiment, the control for avoiding fan propeller from condensing is illustrated for indoor unit 40, and for interior Machine 50,60 can also make operation controller 80 carry out the control for avoiding fan propeller from condensing identical with indoor unit 40.The feelings Under condition, each indoor expansion valve 51,61 is functioned as the mechanism of decompressor of each indoor unit 50,60.In addition, indoor fan 53,63 Has fan propeller, mixing air identical with the fan propeller 43a of indoor fan 43 passes through the fan propeller.

(5-2) variation 1B

In the above-described embodiment, setting blowout temperature sensor 453, blowout humidity sensor in machine 40 indoors are shown The example of device 454 and more than two indoor heat exchanger temperature sensors 455, still, as long as any one sensor is arranged, It is just able to carry out the judgement of the size of wet area, therefore, as long as setting blowout temperature sensor 453, blowout humidity sensor 454 and more than two indoor heat exchanger temperature sensors 455 in any one.

(5-3) variation 1C

In the above-described embodiment, it as multi-type air-conditioning device 10, to machine 40 indoors, is separately installed in 50,60 Indoor expansion valve 41,51,61, hydraulic fluid side temperature sensor 44, the devices of 54,64 gentle side temperature sensors 45,55,65 into Still as shown in Figure 9 and Figure 10, these components can also be arranged in explanation of having gone in outdoor unit 20.Expansion valve 41a, 51a, Although 61a is arranged in outdoor unit 20, respectively to the refrigerant flowed in indoor heat exchanger 42,52,62 as negative booster Structure functions.

(5-3-1) outdoor unit 20

As being explained, the difference of Fig. 9 and outdoor unit shown in Fig. 10 20 and outdoor unit 20 shown in FIG. 1 Point is that outdoor unit 20 has expansion valve 41a, 51a, 61a, hydraulic fluid side temperature 44,54,64 gentle side temperature sensors 45,55, 65 this point.About the connection between other compressors 21, four-way switching valve 22, outdoor heat exchanger 23, liquid storage device 24, Fig. 9 and Outdoor unit 20 shown in Fig. 10 is identical as outdoor unit 20 shown in FIG. 1.

In Fig. 9 and outdoor unit shown in Fig. 10 20, the hydraulic fluid side of outdoor heat exchanger 23 in outdoor unit 20 with liquid One end connection of piping 271.Here, the other end of liquid pipe 271 branches into three, and the end difference of branch destination It is connected with one end of expansion valve 41a, 51a, 61a.What the other end of expansion valve 41a, 51a, 61a had with outdoor unit 20 respectively Three hydraulic fluid sides connectivity port 222 connects.The other end and three hydraulic fluid sides connectivity port in these expansion valves 41a, 51a, 61a Hydraulic fluid side temperature sensor 44,54,64 is separately installed between 222.Three hydraulic fluid sides connectivity port 222 respectively with indoor unit The hydraulic fluid side of 40,50,60 indoor heat exchanger 42,52,62 connects.

Fig. 9 and outdoor unit shown in Fig. 10 20 have three gas side connectivity ports 221, three gas side connectivity ports 221 connect with the gas side of the indoor heat exchanger 42,52,62 of indoor unit 40,50,60 respectively.Three gas side connectivity ports 221 connect with three other ends of the gas pipe 272 for branching into three respectively.The refrigerant of three other ends is flowed through in gas One end flowing of piping 272.One end of gas pipe 272 is connect with four-way switching valve 22.In refrigeration operation, gas is matched One end of pipe 272 is connect with liquid storage device 24, and in heating operation, one end of gas pipe 272 and the discharge side of compressor 21 connect It connects.In order to detect three other ends for flowing through gas pipe 272 refrigerant temperature, be separately installed with gas in three other ends Side temperature sensor 45,55,65.

(5-3-2) indoor unit 40,50,60

The expansion valve 41a, 51a, 61a of indoor unit 40,50,60 shown in Fig. 9, hydraulic fluid side temperature sensor 44,54,64, Gas side temperature sensor 45,55,65 is identical with the structure of external structure and indoor unit 40,50,60 shown in FIG. 1, therefore omits Explanation.

The movement of (5-3-3) multi-type air-conditioning device 10

In Fig. 9 and outdoor unit shown in Fig. 10 20, expansion valve 41a, 51a, 61a are controlled by outside control device 37 Aperture.In addition, by hydraulic fluid side temperature sensor 44, temperature that 54,64 gentle side temperature sensors 45,55,65 detect Value is obtained by outside control device 37.

In multi-type air-conditioning device 10 shown in Fig. 1, operation controller 80 via indoor control device 47,57, 67 obtain the temperature value detected by hydraulic fluid side temperature sensor 44,54,64 gentle side temperature sensors 45,55,65, and pass through Expansion valve 41a, 51a, 61a, and multi-type air-conditioning device 10 shown in Fig. 9 are controlled by indoor control device 47,57,67 In, operation controller 80 is obtained via outside control device 37 by hydraulic fluid side temperature sensor 44,54,64 and gas side temperature The temperature value that degree sensor 45,55,65 detects, and expansion valve 41a, 51a, 61a are controlled via indoor control device 37.But It is to obtain about operation controller 80 by hydraulic fluid side temperature sensor 44,54,64 gentle side temperature sensors 45,55,65 The temperature value detected, and expansion valve 41a, 51a, 61a this point, multi-type air-conditioning device shown in FIG. 1 are controlled via device 10 and multi-type air-conditioning device 10 shown in Fig. 9 it is identical, multi-type air-conditioning device 10 shown in Fig. 9 can with it is shown in FIG. 1 more Connection type air-conditioning device 10 is carried out similarly control identical with above embodiment.

In addition, in multi-type air-conditioning device 10 shown in Fig. 9, it is omitted outdoor expansion valve 38, and it is shown in Fig. 1 more In connection type air-conditioning device 10, in refrigeration operation, outdoor expansion valve 38 is made to be shown in a fully open operation the movement for being helpless to refrigeration operation, Therefore, multi-type air-conditioning device 10 shown in Fig. 9 can also freeze identically as multi-type air-conditioning device 10 shown in FIG. 1 The movement other than outdoor expansion valve 38 when operating.

(5-4) variation 1D

In the above-described embodiment, to using blowout temperature sensor 453 of the setting indoors in machine 40, blowout humidity to pass In sensor 454 and indoor heat exchanger temperature sensor 455 any one come carry out wet area size determine the case where It is illustrated, still, in order to improve precision, they can also be combined use.

(5-5) variation 1E

In the above-described embodiment, it condenses in the device as the downstream of indoor heat exchanger 42, with indoor fan 43 It is illustrated for the moisture condensation of fan propeller 43a, still, moisture condensation is not limited to the moisture condensation of fan propeller 43a in device.For example, The case where generating moisture condensation on the vertical vane 416 and/or horizontal blade 417 in the downstream of heat exchanger 42 indoors is also contained in dress It sets in interior moisture condensation.

(5-6) variation 1F

In the above-described embodiment, it illustrates using more than two indoor heat exchanger temperature sensors 455 and passes through Calculate the wet area 491 for the upper limit that the downstream of the indoor heat exchanger 42 for the machine 40 indoors that finds out does not condense in generation device Occupation rate Rw.But it is also possible to be configured to, it can be by wet area using an indoor heat exchanger temperature sensor 455 491 expansion is limited within the upper limit that the downstream of heat exchanger 42 indoors does not condense in generation device.For example, when specific Indoor unit 40 regulation operating range in determine the humidity that the downstream of heat exchanger 42 indoors will not condense in generation device When the occupation rate in region 491, it can be determined that the position of the occupation rate for the wet area 491 that will not be condensed in generation device is matched Indoor heat exchanger temperature sensor 455 is set, in a period of capabilities refrigeration operation, makes the indoor heat exchanger temperature of the position Degree sensor 455 detects the temperature for showing superheat region 492.With this configuration, in a period of capabilities refrigeration operation, energy The upper limit that enough downstreams that the expansion of wet area 491 is limited in heat exchanger 42 indoors will not condense in generation device with It is interior.In addition, such control not only in machine 40 indoors, but also machine 50 indoors, can also be carried out similarly in 60.

Label declaration

10: air-conditioning device；

20: outdoor unit；

21: compressor；

40,50,50: indoor unit；

41,51,61: indoor expansion valve (example of the mechanism of decompressor)；

41a, 51a, 61a: expansion valve (example of the mechanism of decompressor)；

42,52,62: indoor heat exchanger；

43,53,63: indoor fan；

80: operation controller.

Citation

Patent document 1: Japanese Unexamined Patent Application 59-122864 bulletin

Claims (5)

1. a kind of multi-type air-conditioning device, has:

Outdoor unit (20), the outdoor unit (20) have compressor (21), which follows in order to carry out refrigerating cycle The refrigerant of ring is compressed；With

Multiple indoor units (40,50,60), multiple indoor unit (40,50,60) have multiple indoor heat exchangers (42,52,62) With multiple mechanisms of decompressor (41,51,61,41a, 51a, 61a), and have multiple indoor fans (43,53,63), wherein from institute The refrigerant for stating compressor discharge is recycled in the multiple indoor heat exchanger (42,52,62), passes through multiple rooms Air after inside heat exchanger passes through the multiple indoor fan (43,53,63),

At least one indoor unit in the multiple indoor unit is configured to, and is increasing superheat region compared to usual refrigeration operation Capabilities refrigeration operation in, when room temperature is higher than set temperature, reduced by increasing the aperture of the mechanism of decompressor The superheat region of the indoor heat exchanger and expand wet area, on the other hand, increase the air quantity of the indoor fan.

2. multi-type air-conditioning device according to claim 1, wherein

At least one described indoor unit is configured to, in the capabilities refrigeration operation, when room temperature is lower than set temperature, Refrigerating capacity can be reduced by reducing the aperture of the mechanism of decompressor and/or reducing the air quantity of the indoor fan.

3. multi-type air-conditioning device according to claim 1 or 2, wherein

At least one described indoor unit is in the capabilities refrigeration operation using having passed through the wet area and the overheat The mixing air in region freezes, and is determined using the temperature of the mixing air or the humidity of the mixing air in institute The expansion for stating wet area described in the downstream of indoor heat exchanger has been limited within the upper limit that will not be condensed in generation device.

4. multi-type air-conditioning device according to any one of claims 1 to 3, wherein

At least one described indoor unit also has indoor heat exchanger temperature sensor (455) in the indoor heat exchanger, In the capabilities refrigeration operation, determined using the testing result of the indoor heat exchanger temperature sensor in the room The expansion of wet area described in the downstream of inside heat exchanger has been limited within the upper limit that will not be condensed in generation device.

5. multi-type air-conditioning device according to any one of claims 1 to 4, wherein

At least one described indoor unit is increasing the air quantity of the indoor fan to obtain required refrigerating capacity and in institute The downstream for stating indoor heat exchanger the expansion of the wet area can not be limited in the upper limit that will not condense in generation device with When interior, from the pattern switching of the capabilities refrigeration operation to the mode of the usual refrigeration operation.