CN109416204A - Air conditioner - Google Patents
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- CN109416204A CN109416204A CN201780040641.1A CN201780040641A CN109416204A CN 109416204 A CN109416204 A CN 109416204A CN 201780040641 A CN201780040641 A CN 201780040641A CN 109416204 A CN109416204 A CN 109416204A
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- refrigerant
- source side
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- heat source
- side heat
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Abstract
Heat source side heat exchanger (23) has the first connecting refrigerant lines (23a) and second refrigerant connecting tube (23b), and constitute are as follows: the refrigerant flowed into from the first connecting refrigerant lines (23a) from top towards flowing underneath, is then flowed out from second refrigerant connecting tube (23b) in the inside of heat source side heat exchanger (23).Refrigerant circuit (20) has the heat source side loop portion (30) comprising heat source side heat exchanger (23).Heat source side loop portion (30) is constituted are as follows: under refrigeration operation and heating operation, the circulating direction by the refrigerant of heat source side heat exchanger (23) is all the direction that second refrigerant connecting tube (23b) is flowed to from the first connecting refrigerant lines (23a).
Description
Technical field
This disclosure relates to a kind of air conditioner.
Background technique
So far, known comprising carrying out the air conditioner of the refrigerant circuit of refrigeration cycle.For example, in patent text
It offers and discloses a kind of air-conditioning device in 1, which has refrigerant circuit, and implements the refrigeration freezed to cabin and transport
Turn, which there is compressor, condenser (heat source side heat exchanger), expansion mechanism and evaporator (to be handed over using side heat
Parallel operation).In addition, condenser is made of shell-and-tube exchanger in the air-conditioning device of patent document 1.Specifically, condenser
The more heat-transfer pipes for including the shell for being formed as cylindrical shape and being arranged in inside shell.The top of shell is provided with refrigerant inlet
Pipe, is provided with refrigerant outlet pipe in the lower part of shell.Also, the refrigerant inside shell is flowed into shell from refrigerant inlet pipe
It is then flowed out from refrigerant outlet pipe from top towards flowing underneath inside.The refrigeration flowed downward inside shell from top
Agent is cooled down after carrying out heat exchange with the cooling water flowed in more heat-transfer pipes.
Patent document 1: Japanese Laid-Open Patent Publication Laid-Open 2012-136152 bulletin
Summary of the invention
Technical problems to be solved by the inivention-
It is contemplated that switching carry out refrigeration operation and heating operation in following air conditioners, wherein the air conditioner includes
With compressor, heat source side heat exchanger, expansion mechanism and the refrigerant circuit for utilizing side heat exchanger, in the refrigeration operation
Under, allow refrigerant to recycle in refrigerant circuit, and heat source side heat exchanger becomes condenser, becomes using side heat exchanger
Evaporator allows refrigerant to recycle in refrigerant circuit under the heating operation, and heat source side heat exchanger becomes evaporation
Device becomes condenser using side heat exchanger.It may also be contemplated that constituting heat with shell-and-tube exchanger as patent document 1
Source heat exchanger.That is, it is contemplated that: so that the side that refrigerant flows along the vertical direction in heat source side heat exchanger
Formula constitutes heat source side heat exchanger.
With construction as described above, under refrigeration operation, the refrigerant to gush out from compressor is just
It can be flowed out in the inside of heat source side heat exchanger from top towards flowing underneath, and under heating operation from expansion mechanism
Refrigerant will the inside of heat source side heat exchanger from below towards top flow.Also, under heating operation, refrigerant
(refrigerant evaporated) is flowed towards top from below in the inside of heat source side heat exchanger, when refrigerator oil is from the refrigerant
In when separating, refrigerator oil will accumulate in heat source side heat exchange from top towards flowing underneath under gravity
The inside of device.
It should be noted that in order to eliminate the refrigerator oil in above-mentioned such heat source side heat exchanger accumulate get up show
As, it may be however recalled that oil return pipe is set on heat source side heat exchanger, make the refrigerator oil accumulated in heat source side heat exchanger from
Oil return pipe outflow.But, it due to the type of refrigerant, the type of refrigerator oil, operating condition (temperature, pressure) etc., leads
It causes the accumulation position (liquid level of refrigerator oil) of refrigerator oil to generate variation, thus is difficult to suitably set the position of oil return pipe
It sets.
Then, the purpose of the disclosure is: providing a kind of refrigerator oil accumulation being able to suppress in heat source side heat exchanger
Air conditioner.
To solve the technical solution-of technical problem
The first aspect of the disclosure is related to a kind of air conditioner, and the air conditioner includes handing over compressor 21, heat source side heat
Parallel operation 23, expansion mechanism 24 and the refrigerant circuit 20 using side heat exchanger 25, the air conditioner switch carry out refrigeration operation
And heating operation, under the refrigeration operation, the refrigerant circulation in the refrigerant circuit 20, and the heat source side heat exchanger
23 become condenser, this becomes evaporator using side heat exchanger 25, under the heating operation, in the refrigerant circuit 20
Refrigerant circulation, and the heat source side heat exchanger 23 becomes evaporator, and this becomes condenser using side heat exchanger 25, special
Sign is: the heat source side heat exchanger 23 has the first connecting refrigerant lines 23a and second refrigerant connecting tube 23b, and
It is configured to the refrigerant flowed into from the first connecting refrigerant lines 23a in the inside of the heat source side heat exchanger 23 from top court
Flowing underneath, then from the second refrigerant connecting tube 23b flow out, the refrigerant circuit 20 have includes the heat source side
The heat source side loop portion 30 of heat exchanger 23, heat source side loop portion 30 are constituted are as follows: under refrigeration operation and heating operation, are led to
The circulating direction for crossing the refrigerant of the heat source side heat exchanger 23 is all from described in the first connecting refrigerant lines 23a flow direction
The direction of second refrigerant connecting tube 23b.
In the first aspect, under refrigeration operation and heating operation, it can make inside heat source side heat exchanger 23
The circulating direction of refrigerant be the direction flowed downward from above.Therefore, even if refrigerator oil is comfortable warm under heating operation
The inside of source heat exchanger 23 is separated from the refrigerant that top is flowed downward, which also can be in gravity
From top towards flowing underneath under effect, it is thus possible to make the refrigerator oil together with refrigerant from heat source side heat exchanger 23
Outflow.
The second aspect of the disclosure is on the basis of the first aspect, it is characterised in that: under the heating operation,
The decompression amount of refrigerant in the expansion mechanism 24 is according to the refrigerant flowed out from the heat source side heat exchanger 23
What the degree of superheat was adjusted.
In above-mentioned second aspect, due to the decompression amount of the refrigerant under heating operation in expansion mechanism 24 be according to from
The degree of superheat of the refrigerant flowed out in heat source side heat exchanger 23 is adjusted, it is thus possible to make the refrigerant in heating
It is reliably evaporated in heat source side heat exchanger 23 in operation process.
The third aspect of the disclosure is on the basis of the first or second aspect, it is characterised in that: the heat source side
Heat exchanger 23 is made of shell-and-tube exchanger.
In the above-mentioned third aspect, by constituting heat source side heat exchanger 23 with shell-and-tube exchanger, so as to hold
It changes places and splits heat source side heat exchanger 23.
The fourth aspect of the disclosure is on the basis of first face either into the third aspect, and feature exists
In: the first connecting refrigerant lines 23a of the heat source side heat exchanger 23 is evaporated by condensation side connecting refrigerant lines 81 and Duo Gen
Side connecting refrigerant lines 82 are constituted, the heat source side heat exchanger 23 be configured to from the condensation side connecting refrigerant lines 81 or
The refrigerant that the more evaporation side connecting refrigerant lines 82 flow into the inside of the heat source side heat exchanger 23 from top towards
Then flowing underneath is flowed out from the second refrigerant connecting tube 23b, heat source side loop portion 30 has to make refrigerant
The current divider 80 of shunting, and be configured under the refrigeration operation, the refrigerant quilt to have gushed out from the compressor 21
The condensation side connecting refrigerant lines 81 for supplying the heat source side heat exchanger 23, under the heating operation, from the expansion
The refrigerant that mechanism 24 flows out passes through the current divider more evaporation sides after 80s for being supplied to the heat source side heat exchanger 23
Connecting refrigerant lines 82.
In above-mentioned fourth aspect, the refrigerant flowed out from expansion mechanism 24 under heating operation is after 80s by current divider
It is supplied to more evaporation side connecting refrigerant lines 82 of heat source side heat exchanger 23, it is thus possible to promote heat source side heat exchanger 23
In refrigerant evaporation.
The effect of invention-
According to the disclosure in a first aspect, even if under heating operation in refrigerator oil leisure heat source side heat exchanger 23
Portion is separated from the refrigerant that top is flowed downward, can also make the refrigerator oil together with refrigerant from heat source side heat
The refrigerator oil for flowing out, therefore being able to suppress in heat source side heat exchanger 23 in exchanger 23 accumulates.
According to the second aspect of the disclosure, since heat source side heat of refrigerant during in heating operation can be made to hand over
It is reliably evaporated in parallel operation 23, therefore can prevent the liquid refrigerant under heating operation from flowing out from heat source side heat exchanger 23
The phenomenon that being sucked afterwards by compressor 21 (so-called liquid reflux phenomenon) occurs.
It, can because can easily split heat source side heat exchanger 23 according to the third aspect of the disclosure
Easily heat source side heat exchanger 23 is maintained, is checked.
According to the fourth aspect of the disclosure, since the refrigeration in heat source side heat exchanger 23 can be promoted under heating operation
Agent evaporation, therefore can be difficult to generate the liquid refrigerant under heating operation and be compressed after being flowed out in heat source side heat exchanger 23
The phenomenon that machine 21 sucks (so-called liquid reflux phenomenon).
Detailed description of the invention
Fig. 1 is the piping diagram for showing the topology example of air conditioner involved in embodiment.
Fig. 2 is the longitudinal sectional view for showing the topology example of heat source side heat exchanger.
Fig. 3 is the piping diagram to illustrate refrigeration operation.
Fig. 4 is the piping diagram to illustrate heating operation.
Fig. 5 is the piping diagram for showing the variation of air conditioner.
Specific embodiment
In the following, embodiment is explained in detail with reference to the accompanying drawings.It should be noted that in the accompanying drawings to same section or suitable portion
Minute mark note same symbol does not do repeated explanation to it.
(air conditioner)
Fig. 1 shows the topology example of air conditioner 10 involved in embodiment.The air conditioner 10 is empty to air-conditioning object
Between (such as in the cabin of ship) carry out the device of air conditioning, and have refrigerant circuit 20 and controller 60.In air-conditioning
In machine 10, the heating for carrying out the refrigeration operation to freeze to air-conditioning object space and being heated to air-conditioning object space is transported
Turn.
< refrigerant circuit >
Refrigerant circuit 20 has compressor 21, four-way reversing valve 22, heat source side heat exchanger 23, expansion mechanism 24 and benefit
With side heat exchanger 25, and it is configured to make refrigerant circulation and carry out steam compression type refrigerating circulation.Specifically, freezing
It under operating, recycles refrigerant in refrigerant circuit 20, and heat source side heat exchanger 23 becomes condenser, is handed over using side heat
Parallel operation 25 becomes evaporator.On the other hand, under heating operation, recycle refrigerant in refrigerant circuit 20, and utilize
Side heat exchanger 25 becomes condenser, and heat source side heat exchanger 23 becomes evaporator.In this example, refrigerant circuit 20 has
Heat source side loop portion 30 comprising heat source side heat exchanger 23.In addition, using near side heat exchanger 25, be provided with to
Side heat exchanger is utilized by feeding to using side air (feeding to the air in the cabin of the refrigeration air of object space, such as ship)
25 utilization crosswind fan 26.
" compressor "
Compressor 21 is constituted are as follows: is sprayed again after compressing to the refrigerant sucked.For example, compressor 21 is by complete
Closed screw compressor is constituted.In addition, the internal storage in compressor 21 has the freezing for being lubricated to compressor 21
Machine oil.It should be noted that a part of refrigerator oil recycles in refrigerant circuit 20 together with refrigerant.
" four-way reversing valve "
Four-way reversing valve 22 is constituted are as follows: can be connected in the first valve port with third valve port and the second valve port and the 4th valve port connect
Logical first state (state being shown by a solid line in Fig. 1) and the first valve port are connected to the 4th valve port and the second valve port and
It is switched between the second state (state being shown in broken lines in Fig. 1) of three valve ports connection.
In this example, via the first refrigerant between the first valve port of four-way reversing valve 22 and the ejiction opening of compressor 21
Pipeline P1 is connected with each other, via second refrigerant between the second valve port of four-way reversing valve 22 and the suction inlet of compressor 21
Pipeline P2 is connected with each other.In addition, the third valve port of four-way reversing valve 22 and one end (tie point in heat source side loop portion 30
Q1 it is connected with each other between) via third refrigerant tubing P3, the 4th valve port of four-way reversing valve 22 and utilization side heat exchange
It is connected with each other between the gas end of device 25 via the 4th refrigerant tubing P4.In addition, the other end in heat source side loop portion 30
It is connected with each other between one end (tie point Q3) of (tie point Q2) and expansion mechanism 24 via the 5th refrigerant tubing P5, it is swollen
Via the 6th refrigerant tubing P6 between the other end (tie point Q4) of swollen mechanism 24 and the liquid end for utilizing side heat exchanger 25
It is connected with each other.
" heat source side heat exchanger "
Heat source side heat exchanger 23 is configured to that refrigerant and water (such as seawater, clear water) is made to carry out heat exchange.Specifically,
Heat source side heat exchanger 23 has the first connecting refrigerant lines 23a and second refrigerant connecting tube 23b, and constitutes are as follows: from
First connecting refrigerant lines 23a flow into refrigerant the inside (first flow path) of heat source side heat exchanger 23 from top under
Then Fang Liudong is flowed out from second refrigerant connecting tube 23b.
In this example, heat source side heat exchanger 23 has the first connecting refrigerant lines 23a, second refrigerant connecting tube
23b, the first water connecting tube 23c and the second water connecting tube 23d.In turn, heat source side heat exchanger 23 is included to make from the first system
The refrigerant that cryogen connecting tube 23a is flowed into flows out first-class from second refrigerant connecting tube 23b after circulating downward from top
Road and the second flow path to make to flow out after logical from the second water connecting tube 23d from the water flow that the first water connecting tube 23c is flowed into.And
And heat source side heat exchanger 23 constitute are as follows: make the refrigerant flowed in first flow path in second flow path flowing water into
Row heat exchange.
As shown in Fig. 2, heat source side heat exchanger 23 is made of shell-and-tube exchanger.Specifically, heat source side heat exchange
Device 23 has shell 71, more heat-transfer pipes 72 and supporting station 73.
Shell 71 is formed as cylindrical shape closed at both ends.The inner space of shell 71 is arranged in shell 71 by reserving compartment of terrain each other
First and second partition 71a, 71b in axial direction are divided into three spaces, the sky between first partition 71a and second partition 71b
Between constitute cryogen chamber S10, the space between first partition 71a and the one end of shell 71 is (for than first partition 71a in Fig. 2
Space on the right side) the first header space S11 is constituted, the space between second partition 71b and the other end of shell 71 is (in Fig. 2
In for than second partition 71b lean on left side space) constitute the second header space S12.First header space S11 is by the axis along shell 71
Two spaces are divided into the third partition 71c of extension, paper front side (is leaned on than third partition 71c in Fig. 2 in a space
Space) constitute the first water chamber S15, another space (space in Fig. 2 to lean on paper inboard than third partition 71c) composition
Second water chamber S16.
The top of shell 71 is arranged in first connecting refrigerant lines 23a, and is connected to cryogen chamber S10.Second refrigerant connects
The lower part of shell 71 is arranged in adapter tube 23b, and is connected to cryogen chamber S10.First and second water connecting tube 23c, 23d is arranged in shell
71 one end (being right part in Fig. 2), and be connected to respectively with first and second water chamber S15, S16.
More heat-transfer pipes 72 are arranged in cryogen chamber S10 and respectively along the axially extending of shell 71, the more heat transfers
The one end of pipe 72 is connected to after running through first partition 71a with the first header space S11, and the other end of the more heat-transfer pipes 72 is passed through
It is connected to after wearing second partition 71b with the second header space S12.Supporting station 73 by make shell 71 be axially facing horizontal direction in a manner of
Support shell 71.
In heat source side heat exchanger 23 shown in Fig. 2, cryogen chamber is flowed into from the first connecting refrigerant lines 23a
Refrigerant in S10, from top towards flowing underneath, then flows to the second refrigeration from cryogen chamber S10 in cryogen chamber S10
Agent connecting tube 23b.On the other hand, the water in the first water chamber S15 is flowed into more heat-transfer pipes 72 from the first water connecting tube 23c
Portion of heat transfer pipe (in Fig. 2 be located at than third partition 71c lean on paper front side heat-transfer pipe 72) in flowing and reach second
Header space S12, in the surplus of more heat-transfer pipes 72 after then inverting the flow direction of water in the second header space S12
It flows in remaining heat-transfer pipe (being located at the heat-transfer pipe 72 for leaning on paper inboard than third partition 71c in Fig. 2) and reaches the second water chamber
S16 flows to the second water connecting tube 23d from the second water chamber S16 again later.Also, heat source side heat exchanger 23 shown in Fig. 2
In, heat is being carried out in the refrigerant flowed along the vertical direction in cryogen chamber S10 and between flowing water in more heat-transfer pipes 72
Exchange.
" expansion mechanism "
Fig. 1 is returned to, expansion mechanism 24 is configured to depressurize refrigerant.In addition, expansion mechanism 24 is configured to adjust
Control the decompression amount of cryogen.Under refrigeration operation, according to the degree of superheat of the refrigerant flowed out from using side heat exchanger 25 come
Adjust the decompression amount of the refrigerant in expansion mechanism 24；Under heating operation, according to what is flowed out from heat source side heat exchanger 23
The degree of superheat of refrigerant adjusts the decompression amount of the refrigerant in expansion mechanism 24.
In this example, expansion mechanism 24 has the first expansion valve 41 and the second expansion valve 42, and constitutes are as follows: is freezing
Under operating, refrigerant is flowed via the first expansion valve 41 towards using side heat exchanger 25 from heat source side heat exchanger 23；It is making
Under heat run, refrigerant is flowed via the second expansion valve 42 towards heat source side heat exchanger 23 from using side heat exchanger 25.
First and second expansion valve 41,42 is made of thermal expansion valve (heating power expansion valve).Specifically, first and
Two expansion valves 41,42 are respectively provided with first and second temperature sensing package 41a, 42a.First and second temperature sensing package 41a, 42a be filled with
The identical refrigerant of the refrigerant recycled in refrigerant circuit 20.First temperature sensing package 41a be mounted under refrigeration operation from benefit
The pipeline flowed with the refrigerant flowed out in side heat exchanger 25 is (in this example on second refrigerant pipeline P2), second feels
Thermometer bulb 42a is mounted on the pipeline for the refrigerant flowing flowed out from heat source side heat exchanger 23 under heating operation (in this example
In be heat source side heat exchanger 23 second refrigerant connecting tube 23b) on.Also, first and second expansion valve 41,42 is constituted
Are as follows: the aperture of first and second expansion valve 41,42 is automatic by the temperature respectively according to first and second temperature sensing package 41a, 42a
Ground is adjusted.
It should be noted that first and second expansion valve 41,42 can also be made of outer balanced type heating power expansion valve.Specifically
For, first and second expansion valve 41,42 can also be respectively provided with first and second temperature sensing package 41a, 42a and first and second is equal
Pressure pipe.The balance pipe (the first balance pipe) of first expansion valve 41 is flowed out from using side heat exchanger 25 under refrigeration operation with confession
Refrigerant flowing pipeline (be connected in this example for second refrigerant pipeline P2), the balance pipe of the second expansion valve 42
(the second balance pipe) and the pipeline of the refrigerant flowing for flowing out from heat source side heat exchanger 23 under heating operation (are originally showing
It is the second refrigerant connecting tube 23b of heat source side heat exchanger 23 in example) it is connected.It is first swollen that first expansion valve 41 is configured to this
The aperture of swollen valve 41 is automatically adjusted by the refrigerant pressure in the temperature and the first balance pipe according to the first temperature sensing package 41a
Section；The aperture that second expansion valve 42 is configured to second expansion valve 42 is pressed by the temperature and second according to the second temperature sensing package 42a
Refrigerant pressure in pipe is automatically adjusted.
In this example, expansion mechanism 24 also has intermediate conduit other than having first and second expansion valve 41,42
50, first and second main pipeline 51,52, first and second bypass duct 53,54, first and second filter 55,56, Yi Ji
One and second bypass check valve 57,58.
First main pipeline 51 is for making refrigerant via the first expansion valve 41 in heat source side loop portion 30 and utilization side heat
The pipeline flowed between exchanger 25.The first expansion valve 41 is provided on the first main pipeline 51.Also, the first main pipeline 51
One end is connect with one end of intermediate conduit 50, and the other end of first main pipeline 51 via the 6th refrigerant tubing P6 and utilizes side
The liquid end of heat exchanger 25 connects.
Second main pipeline 52 is for making refrigerant via the second expansion valve 42 in heat source side loop portion 30 and utilization side heat
The pipeline flowed between exchanger 25.The second expansion valve 42 is provided on the second main pipeline 52.In this example, the second supervisor
The one end in road 52 is connect with one end of intermediate conduit 50, the other end of second main pipeline 52 via the 5th refrigerant tubing P5 with
The other end (tie point Q2) in heat source side loop portion 30 connects.
First bypass duct 53 is for making refrigerant bypass the first expansion valve 41 in heat source side loop portion 30 and utilizing side
The pipeline flowed between heat exchanger 25.In this example, the other end of one end of the first bypass duct 53 and intermediate conduit 50
The other end of connection, first bypass duct 53 is connected via the 6th refrigerant tubing P6 and using the liquid end of side heat exchanger 25
It connects.In addition, being provided with first filter 55 and the first bypass check valve 57 on the first bypass duct 53.First bypass check valve
57 are constituted are as follows: refrigerant is only allowed (originally to show from using 25 side of side heat exchanger towards the flowing of 30 side of heat source side loop portion
It is other end flowing of the refrigerant from the 6th refrigerant tubing P6 towards intermediate conduit 50 in example).
Second bypass duct 54 is for making refrigerant bypass the second expansion valve 42 in heat source side loop portion 30 and utilizing side
The pipeline flowed between heat exchanger 25.In this example, the other end of one end of the second bypass duct 54 and intermediate conduit 50
The other end of connection, second bypass duct 54 (connects via the other end in the 5th refrigerant tubing P5 and heat source side loop portion 30
Contact Q2) connection.In addition, being provided with the second filter 56 and the second bypass check valve 58 on the second bypass duct 54.Second
Bypass check valve 58 constitute are as follows: only allow refrigerant from 30 side of heat source side loop portion towards utilize 25 1 effluent of side heat exchanger
Dynamic (in this example, being other end flowing of the refrigerant from the 5th refrigerant tubing P5 towards intermediate conduit 50).
" utilizing side heat exchanger "
Utilize side heat exchanger 25 constitute are as follows: make refrigerant with by using crosswind fan 26 transport come utilize side air (quilt
Feed to the air of refrigeration object space) carry out heat exchange.In this example, using side heat exchanger 25 by Gilled heat exchanger
It constitutes.
" heat source side loop portion "
Heat source side loop portion 30 is constituted are as follows: under refrigeration operation and heating operation, passes through the system of heat source side heat exchanger 23
The circulating direction of cryogen is all the direction that second refrigerant connecting tube 23b is flowed to from the first connecting refrigerant lines 23a.In this example
In, heat source side loop portion 30 has the first~the 4th connecting pipe 31~34 and the first~the 4th check-valves 35~38.
One end of first connecting pipe 31 is connect with the first connecting refrigerant lines 23a of heat source side heat exchanger 23, this
The other end of one connecting pipe 31 is connect via third refrigerant tubing P3 with the third valve port of four-way reversing valve 22.First non-return
Valve 35 is arranged in the first connecting pipe 31, and is configured to only allow refrigerant from the side third refrigerant tubing P3 (that is, four
Logical 22 side of reversal valve) it is flowed towards the first side connecting refrigerant lines 23a of heat source side heat exchanger 23.
One end of second connecting pipe 32 is connect with the first connecting refrigerant lines 23a of heat source side heat exchanger 23, this
The other end of two connecting pipes 32 is connect via the 5th refrigerant tubing P5 with one end (tie point Q3) of expansion mechanism 24.Second
Check-valves 36 is arranged in the second connecting pipe 32, and is configured to only allow refrigerant from the 5th side refrigerant tubing P5
(that is, 24 side of expansion mechanism) is flowed towards the first side connecting refrigerant lines 23a of heat source side heat exchanger 23.
One end of third connecting pipe 33 is connect with the second refrigerant connecting tube 23b of heat source side heat exchanger 23, this
The other end of three connecting pipes 33 is connect via the 5th refrigerant tubing P5 with one end (tie point Q3) of expansion mechanism 24.Third
Check-valves 37 is arranged in third connecting pipe 33, and is configured to only allow refrigerant from the second of heat source side heat exchanger 23
It is flowed towards the 5th side refrigerant tubing P5 (that is, 24 side of expansion mechanism) side connecting refrigerant lines 23b.
One end of 4th connecting pipe 34 is connect with the second refrigerant connecting tube 23b of heat source side heat exchanger 23, this
The other end of four connecting pipes 34 is connect via third refrigerant tubing P3 with the third valve port of four-way reversing valve 22.4th non-return
Valve 38 is arranged in the 4th connecting pipe 34, and is configured to only allow second refrigeration of the refrigerant from heat source side heat exchanger 23
It is flowed towards the side third refrigerant tubing P3 (that is, 22 side of four-way reversing valve) the agent side connecting tube 23b.
< controller >
Controller 60 is constituted are as follows: according to various sensors (temperature sensor, pressure sensor being arranged in air conditioner 10
Deng) detected value control the various pieces of air conditioner 10, to control the motion of air conditioner 10.Specifically, control
Device 60 is configured to control to compressor 21, four-way reversing valve 22 and using crosswind fan 26.
< refrigeration operation >
Then, refrigeration operation is illustrated referring to Fig. 3.Under refrigeration operation, four-way reversing valve 22 is set to first
State.The ejiction opening of compressor 21 is connected to heat source side loop portion 30 as a result, the suction inlet of compressor 21 and utilization side heat exchange
The gas end of device 25 is connected to.In addition, compressor 21 and 26 being set to operating condition using crosswind fan.Refrigerant is being made as a result,
It is recycled in refrigerant circuit 20, to carry out heat source side heat exchanger 23 as condenser and using side heat exchanger 25 as evaporator
Refrigeration cycle.
In addition, adjusting expansion mechanism according to the degree of superheat of the refrigerant flowed out from the gas end using side heat exchanger 25
The decompression amount of refrigerant in 24.In this example, the first expansion valve 41 is automatically regulated according to the temperature of the first temperature sensing package 41a
Aperture, so as to reach pre-set target from the degree of superheat of refrigerant that the gas end using side heat exchanger 25 is flowed out
The degree of superheat.
From the refrigerant sprayed in compressor 21 by flowing into heat source side loop portion 30 after four-way reversing valve 22.It has been flowed into
Refrigerant to heat source side loop portion 30 is connected by flowing into the first refrigerant of heat source side heat exchanger 23 after first check-valve 35
Adapter tube 23a.In heat source side heat exchanger 23, the refrigerant flowed into from the first connecting refrigerant lines 23a is in heat source side heat exchange
The inside (specifically, be cryogen chamber S10) of device 23 is from the top of vertical direction towards during flowing underneath, in heat source
Inside (specifically, be heat-transfer pipe 72) the flowing water heat release of side heat exchanger 23 and condense, then connect from second refrigerant
Adapter tube 23b outflow.The refrigerant flowed out from the second refrigerant connecting tube 23b of heat source side heat exchanger 23 passes through third non-return
Expansion mechanism 24 is flowed into after valve 37.The refrigerant having flowed into expansion mechanism 24 passes sequentially through by the second filter 56, second
The first expansion valve 41 is flowed into after road check-valves 58 and intermediate conduit 50, and is depressurized in the first expansion valve 41.?
The refrigerant that has been depressurized in one expansion valve 41 is flowed into using side heat exchanger 25, using in side heat exchanger 25 from utilizing side
Air absorbs heat and evaporates.It is cooled down as a result, using side air, realizes the refrigeration to air-conditioning object space.From utilize side
The refrigerant flowed out in heat exchanger 25 is sucked after passing through four-way reversing valve 22 by compressor 21.
< heating operation >
Then, heating operation is illustrated referring to Fig. 4.Under heating operation, four-way reversing valve 22 is set to second
State.The ejiction opening of compressor 21 is connected to using the gas end of side heat exchanger 25 as a result, the suction inlet and heat of compressor 21
Source circuit portion 30 is connected to.In addition, compressor 21 and 26 being set to operating condition using crosswind fan.Refrigerant is being made as a result,
It is recycled in refrigerant circuit 20, utilize, side heat exchanger 25 becomes condenser and heat source side heat exchanger 23 becomes evaporator
Refrigeration cycle.
In addition, according to the degree of superheat of the refrigerant flowed out from the second refrigerant connecting tube 23b of heat source side heat exchanger 23
To adjust the decompression amount of the refrigerant in expansion mechanism 24.In this example, it is automatically adjusted according to the temperature of the second temperature sensing package 42a
The aperture of the second expansion valve 42 is saved, so that the refrigerant flowed out from the second refrigerant connecting tube 23b of heat source side heat exchanger 23
The degree of superheat reach pre-set target superheat degree.
The refrigerant that compressor 21 is sprayed flows into after passing through four-way reversing valve 22 using side heat exchanger 25, is utilizing side
It is condensed in heat exchanger 25 towards using side air heat release.It is heated, is realized empty to air-conditioning object using side air as a result,
Between heating.Expansion mechanism 24 is flowed into from the refrigerant flowed out using side heat exchanger 25.It has flowed into expansion mechanism 24
Refrigerant flows into the second expansion valve 42 after passing sequentially through first filter 55, the first bypass check valve 57 and intermediate conduit 50, and
And it is depressurized in the second expansion valve 42.The refrigerant flowed out from the second expansion valve 42 flows into heat source side loop portion 30.It has flowed
The first refrigerant that the refrigerant entered to heat source side loop portion 30 passes through inflow heat source side heat exchanger 23 after second check-valve 36
Connecting tube 23a.In heat source side heat exchanger 23, the refrigerant flowed into from the first connecting refrigerant lines 23a is handed in heat source side heat
The inside (specifically, be cryogen chamber S10) of parallel operation 23 is from the top of vertical direction towards during flowing underneath, Cong Re
It absorbs heat and evaporates in inside (specifically, being heat-transfer pipe 72) flowing water of source heat exchanger 23, then from the second refrigeration
Agent connecting tube 23b outflow.It is passed sequentially through from the refrigerant that the second refrigerant connecting tube 23b of heat source side heat exchanger 23 flows out
It is sucked after 4th check-valves 38 and four-way reversing valve 22 by compressor 21.
The effect > of < embodiment
As described above, the refrigerant inside heat source side heat exchanger 23 can be made under refrigeration operation and heating operation
Circulating direction be the direction flowed downward from above.Therefore, even if refrigerator oil leisure heat source side heat is handed under heating operation
The inside of parallel operation 23 is separated from the refrigerant that top is flowed downward, the refrigerator oil also can under gravity from
Top is towards flowing underneath, it is thus possible to flow out the refrigerator oil from heat source side heat exchanger 23 together with refrigerant.By
This, the refrigerator oil being able to suppress in heat source side heat exchanger 23 accumulates.
Further, since the decompression amount of the refrigerant under heating operation in expansion mechanism 24 is according to from heat source side heat exchange
The degree of superheat of the refrigerant flowed out in device 23 is adjusted, it is thus possible to make refrigerant in heating operation during
It is reliably evaporated in heat source side heat exchanger 23.Thereby, it is possible to prevent under heating operation liquid refrigerant to hand over from heat source side heat
The phenomenon that being sucked after flowing out in parallel operation 23 by compressor 21 (so-called liquid reflux phenomenon) occurs.
Further, since the decompression amount of the refrigerant under refrigeration operation in expansion mechanism 24 be according to from utilize side heat exchange
The degree of superheat of the refrigerant flowed out in device 25 is adjusted, it is thus possible to make refrigerant in refrigeration operation during
Using reliably being evaporated in side heat exchanger 25.Thereby, it is possible to prevent under refrigeration operation liquid refrigerant to hand over from using side heat
The phenomenon that being sucked after flowing out in parallel operation 25 by compressor 21 (so-called liquid reflux phenomenon) occurs.
In addition, by constituting heat source side heat exchanger 23 with shell-and-tube exchanger, so as to easily by heat source side
Heat exchanger 23 is split.Thereby, it is possible to easily be maintained heat source side heat exchanger 23, checked.
(variation of air conditioner)
Then, referring to Fig. 5, the variation of air conditioner 10 is illustrated.The heat source side heat of air conditioner 10 shown in fig. 5 is handed over
The structure in parallel operation 23 and heat source side loop portion 30 is different from air conditioner 10 shown in FIG. 1.It should be noted that sky shown in fig. 5
The other structures of tune machine 10 are identical as the structure of air conditioner 10 shown in FIG. 1.
" heat source side heat exchanger "
In the example of hgure 5, the first connecting refrigerant lines 23a of heat source side heat exchanger 23 is connected by condensation side refrigerant
Pipe 81 and Duo Gen (being in this example the six roots of sensation) evaporation side connecting refrigerant lines 82 are constituted.Also, 23 structure of heat source side heat exchanger
Become: the refrigerant flowed into from 81 or more evaporation side connecting refrigerant lines 82 of condensation side connecting refrigerant lines is handed in heat source side heat
It is then flowed out from second refrigerant connecting tube 23b from top towards flowing underneath the inside of parallel operation 23.
Specifically, in the example of hgure 5, heat source side heat exchanger 23 is made of shell-and-tube exchanger (referring to Fig. 2).
For example, the top of shell 71 shown in Fig. 2 is arranged in condensation side connecting refrigerant lines 81 and Duo Gen evaporation side connecting refrigerant lines 82,
And it is connected to cryogen chamber S10.It should be noted that the other structures of heat source side heat exchanger 23 can also with it is shown in Fig. 2
The structure of heat source side heat exchanger 23 is identical.In the heat source side heat exchanger 23 with above structure, in cryogen chamber S10
The refrigerant that flows along the vertical direction and heat exchange is carried out between the refrigerant flowed in more heat-transfer pipes 72.
" heat source side loop portion "
In addition, in the example of hgure 5, heat source side loop portion 30 has the current divider 80 for shunting refrigerant.It shunts
Device 80 has an inflow entrance and multiple (being in this example six) outfluxes, and is configured to the system for making to flow into from inflow entrance
Cryogen flows out after shunting from multiple outfluxes.Also, heat source side loop portion 30 is constituted are as follows: is sprayed under refrigeration operation from compressor 21
Refrigerant out is supplied to the condensation side connecting refrigerant lines 81 of heat source side heat exchanger 23；From expansion mechanism under heating operation
The refrigerant of 24 outflows passes through current divider more evaporation side connecting refrigerant lines 82 after 80s for being supplied to heat source side heat exchanger 23.
Specifically, in the example of hgure 5, one end of first connecting pipe 31 in heat source side loop portion 30 and heat source side heat
The condensation side connecting refrigerant lines 81 of exchanger 23 connect, and the other end of first connecting pipe 31 is via third refrigerant tubing
P3 is connect with the third valve port of four-way reversing valve 22.One end of second connecting pipe 32 in heat source side loop portion 30 is via current divider
80 connect with more evaporation side connecting refrigerant lines 82, and the other end of second connecting pipe 32 is via the 5th refrigerant tubing P5
It is connect with one end (tie point Q3) of expansion mechanism 24.That is, one end of the second connecting pipe 32 and the one of current divider 80
A inflow entrance connection, multiple outfluxes of current divider 80 are connect with more evaporation side connecting refrigerant lines 82 respectively.Second non-return
Valve 36 is arranged in the second connecting pipe 32 and between current divider 80 and the 5th refrigerant tubing P5.It should be noted that
The other structures in heat source side loop portion 30 are identical as the structure in heat source side loop shown in FIG. 1 portion 30.
<effect of the variation of embodiment>
As described above, the refrigerant flowed out from expansion mechanism 24 under heating operation is supplied to heat by the way that current divider is after 80s
More evaporation side connecting refrigerant lines 82 of source heat exchanger 23, it is thus possible to promote the refrigeration in heat source side heat exchanger 23
Agent evaporation.Thereby, it is possible to be difficult to generate the liquid refrigerant under heating operation to be pressed after flowing out in heat source side heat exchanger 23
The phenomenon that contracting machine 21 sucks (so-called liquid reflux phenomenon).
(other embodiment)
In the above description, the case where heat source side heat exchanger 23 is made of shell-and-tube exchanger is illustrated, is not overheated
Source heat exchanger 23 is not limited to shell-and-tube exchanger, such as can also be made of heat-exchangers of the plate type.In such case
Under, heat source side heat exchanger 23 can also be made to constitute are as follows: make the refrigerant flowed into from the first connecting refrigerant lines 23a in heat source side
Then the inside (first flow path) of heat exchanger 23 is flowed out from top towards flowing underneath from second refrigerant connecting tube 23b, and
The water flowed into from the first water connecting tube 23c is set to pass through the inside (second different from first flow path of heat source side heat exchanger 23
Road) after from the second water connecting tube 23d flow out, and make the inside (first flow path) of heat source side heat exchanger 23 along the vertical direction
The refrigerant of flowing and heat exchange is carried out between inside (second flow path) flowing water of heat source side heat exchanger 23.
In addition, in the above description, illustrate expansion mechanism 24 by thermal expansion valve (heating power expansion valve) i.e. first and
The case where second expansion valve 41,42 is constituted, but expansion mechanism 24 can also be adjusted under the control of controller 60 by aperture
The electric expansion valve (motor-driven valve) of section is constituted.As described above, when constituting expansion mechanism 24 by electric expansion valve, in refrigeration operation
Under, the electronic expansion for constituting expansion mechanism 24 is adjusted according to the degree of superheat of the refrigerant flowed out from using side heat exchanger 25
The aperture of valve, and under heating operation, it is adjusted according to the degree of superheat of the refrigerant flowed out from heat source side heat exchanger 23
Constitute the aperture of the electric expansion valve of expansion mechanism 24.
In addition it is also possible to which above embodiment, variation are appropriately combined implementation.Embodiment of above and deformation
Example is substantially preferred example, is not intended to the limitation disclosure, its application to the range of object or its purposes.
Industrial applicability-
In conclusion above-mentioned air-conditioning device is very useful as the air conditioner of air conditioning is carried out to air-conditioning object space
's.
Symbol description-
10 air conditioners
20 refrigerant circuits
21 compressors
22 four-way reversing valves
23 heat source side heat exchangers
The first connecting refrigerant lines of 23a
23b second refrigerant connecting tube
23c the first water connecting tube
23d the second water connecting tube
24 expansion mechanisms
25 utilize side heat exchanger
26 are fanned using crosswind
30 heat source side loop portions
41 first expansion valves
42 second expansion valves
60 controllers
71 shells
72 heat-transfer pipes
73 supporting stations
80 current dividers
81 condensation side connecting refrigerant lines
82 evaporation side connecting refrigerant lines
S10 cryogen chamber
The first header space of S11
The second header space of S12
The first water chamber of S15
The second water chamber of S16
Claims (4)
1. a kind of air conditioner comprising there is compressor (21), heat source side heat exchanger (23), expansion mechanism (24) and utilize side
The refrigerant circuit (20) of heat exchanger (25), which switches carry out refrigeration operation and heating operation, in the refrigeration
Under operating, the refrigerant circulation in the refrigerant circuit (20), and the heat source side heat exchanger (23) becomes condenser, the benefit
Become evaporator with side heat exchanger (25), under the heating operation, the refrigerant circulation in the refrigerant circuit (20), and
And the heat source side heat exchanger (23) becomes evaporator, this becomes condenser using side heat exchanger (25), it is characterised in that:
The heat source side heat exchanger (23) has the first connecting refrigerant lines (23a) and second refrigerant connecting tube (23b), and
And constitute are as follows: the refrigerant flowed into from first connecting refrigerant lines (23a) is in the inside of the heat source side heat exchanger (23)
From top towards flowing underneath, then flowed out from the second refrigerant connecting tube (23b),
The refrigerant circuit (20) has the heat source side loop portion (30) comprising the heat source side heat exchanger (23),
Heat source side loop portion (30) is constituted are as follows: under refrigeration operation and heating operation, passes through the heat source side heat exchanger
(23) circulating direction of refrigerant is all to flow to the second refrigerant connecting tube from first connecting refrigerant lines (23a)
The direction of (23b).
2. air conditioner according to claim 1, it is characterised in that:
Under the heating operation, the decompression amount of the refrigerant in the expansion mechanism (24) is handed over according to from the heat source side heat
What the degree of superheat of the refrigerant flowed out in parallel operation (23) was adjusted.
3. air conditioner according to claim 1 or 2, it is characterised in that:
The heat source side heat exchanger (23) is made of shell-and-tube exchanger.
4. air conditioner according to any one of claim 1 to 3, it is characterised in that:
The first connecting refrigerant lines (23a) of the heat source side heat exchanger (23) are by condensation side connecting refrigerant lines (81) and more
Root evaporation side connecting refrigerant lines (82) are constituted,
The heat source side heat exchanger (23) is constituted are as follows: from the condensation side connecting refrigerant lines (81) or the more evaporations
The refrigerant that side connecting refrigerant lines (82) flow into the inside of the heat source side heat exchanger (23) from top towards flowing underneath,
Then it is flowed out from the second refrigerant connecting tube (23b),
Heat source side loop portion (30) has the current divider (80) shunt refrigerant, and constitutes are as follows: in the system
Under blowdown firing, the refrigerant sprayed from the compressor (21) is supplied to the condensation side of the heat source side heat exchanger (23)
Connecting refrigerant lines (81)；Under the heating operation, the refrigerant flowed out from the expansion mechanism (24) is by described point
More evaporation side connecting refrigerant lines (82) of the heat source side heat exchanger (23) are supplied to after stream device (80).
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016130535 | 2016-06-30 | ||
| JP2016-130535 | 2016-06-30 | ||
| JP2017-113378 | 2017-06-08 | ||
| JP2017113378A JP6341321B2 (en) | 2016-06-30 | 2017-06-08 | Air conditioner |
| PCT/JP2017/023230 WO2018003699A1 (en) | 2016-06-30 | 2017-06-23 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109416204A true CN109416204A (en) | 2019-03-01 |
Family
ID=60995237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780040641.1A Pending CN109416204A (en) | 2016-06-30 | 2017-06-23 | Air conditioner |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6341321B2 (en) |
| CN (1) | CN109416204A (en) |
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| KR102136883B1 (en) * | 2013-12-09 | 2020-07-23 | 엘지전자 주식회사 | A heat pump system |
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| Publication number | Publication date |
|---|---|
| JP2018009780A (en) | 2018-01-18 |
| JP6341321B2 (en) | 2018-06-13 |
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