CN107560217A - Heat pump system and control method thereof - Google Patents
Heat pump system and control method thereof Download PDFInfo
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- CN107560217A CN107560217A CN201710800326.6A CN201710800326A CN107560217A CN 107560217 A CN107560217 A CN 107560217A CN 201710800326 A CN201710800326 A CN 201710800326A CN 107560217 A CN107560217 A CN 107560217A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 63
- 239000003507 refrigerant Substances 0.000 claims abstract description 49
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 37
- 238000005086 pumping Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000010257 thawing Methods 0.000 abstract 8
- 238000004378 air conditioning Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
The invention discloses a heat pump system and a control method thereof. The heat pump system comprises a refrigerant flow path, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a throttling element and a defrosting branch path, wherein the defrosting branch path is used for defrosting the outdoor heat exchanger, one end of the defrosting branch path can be connected with an exhaust pipe of the compressor, and the other end of the defrosting branch path can be connected to the upstream side of the outdoor heat exchanger when the heat pump system operates in a heating mode. The defrosting branch in the heat pump system can introduce high-temperature exhaust gas of the compressor to the bottom and/or the lower part of the outdoor heat exchanger to heat the outdoor heat exchanger, so that the problems of low heating efficiency and high energy consumption caused by incomplete defrosting of the bottom and the lower part of the outdoor heat exchanger are solved, a refrigerant after heat exchange is introduced to the upstream side of the outdoor heat exchanger by the defrosting branch, the heating efficiency is ensured, the energy efficiency loss is reduced, the impact of the refrigerant on a pipeline is avoided, and the operation reliability of the heat pump system is ensured.
Description
Technical field
The present invention relates to technical field of heat pumps, particularly a kind of heat pump and its control method.
Background technology
When air-conditioning system runs heating mode under worst cold case, frost occurs on outdoor heat exchanger, therefore need
Defrosted, common Defrost mode is that four-way valve commutates so that air-conditioning system runs defrost pattern, utilizes air-conditioning system
The refrigerant of itself defrosts to outdoor heat exchanger.Under the Action of Gravity Field of refrigerant, the bottom of outdoor heat exchanger has more
Refrigerant, therefore the bottom frost of outdoor heat exchanger can be than more serious, the conventional defrost pattern of air-conditioning system operation can not incite somebody to action
Positioned at the white fully erased of bottom, cause efficiency of the air-conditioning system when running heating mode low, it is difficult to meet normal heating
Demand.
In view of the above-mentioned problems, the structure of air-conditioning system is improved in the prior art, for example, being run in air-conditioning system
The refrigerant in outdoor heat exchanger lower manifold is ended during heating mode, or the refrigerant that indoor heat exchanger flows out is introduced directly into
In the lower manifold of outdoor heat exchanger, then it is introduced into again after throttling arrangement throttles in the upper pipeline of outdoor heat exchanger, this
Although kind mode can solve the problem that the problem of frosting of outdoor heat exchanger bottom is serious, but due in the lower manifold of outdoor heat exchanger
Refrigerant is heat release, reduces the heating capacity of air-conditioning system.For another example in compressor operating heating mode, compressor is discharged
Refrigerant be introduced directly into the lower manifold of outdoor heat exchanger and exchanged heat, the refrigerant after heat exchange directly flows back to the air-breathing of compressor
Mouthful, the problem of this mode is there is also the heating capacity of air-conditioning system is reduced, also, due to cold after outdoor heat exchanger exchanges heat
Matchmaker is returned directly to the air entry of compressor, and refrigerant impact is easily formed in pipeline, influences the operation stability of air-conditioning system.
The content of the invention
In view of this, an object of the present invention is to provide one kind and can ensure operational efficiency in a heating mode, reduce
Efficiency consume, the heat pump of stable and reliable operation and its control method.
For the above-mentioned purpose, on the one hand, the present invention adopts the following technical scheme that：
A kind of heat pump, compressor, outdoor heat exchanger, indoor heat exchange are provided with the refrigerant flow of the heat pump
Device and restricting element, in addition to for carrying out the defrost branch road of defrost to the outdoor heat exchanger, run in the heat pump
During heating mode, one end of the defrost branch road can be connected with the blast pipe of the compressor, and the other end has access to described
The upstream side of outdoor heat exchanger.
Preferably, the other end of the defrost branch road is had access between the outdoor heat exchanger and the restricting element
In pipeline.
Preferably, the defrost branch road includes being arranged on the bottom of the outdoor heat exchanger and/or the heat exchanger tube of bottom.
Preferably, one end of the heat exchanger tube passes through the first pipeline and the gas exhaust piping of the compressor in a heating mode
Connection, the other end are accessed in the pipeline between the outdoor heat exchanger and the restricting element by the second pipeline.
Preferably, it is provided with first switch device on first pipeline；And/or
Second switch device is provided with second pipeline.
Preferably, one end of the heat exchanger tube also passes through the 3rd pipeline and the outdoor heat exchanger in a heating mode cold
Matchmaker's export pipeline connects, the other end of the heat exchanger tube also by the 4th pipeline and the outdoor heat exchanger in a heating mode
Refrigerant inlet pipeline connects.
Preferably, it is provided with the 3rd switching device on the 3rd pipeline；And/or
The 4th switching device is provided with 4th pipeline.
Preferably, the heat pump also includes the first temperature detection dress for being used to detect the Guan Wen of the outdoor heat exchanger
Put and be arranged on the bottom of the outdoor heat exchanger or the second temperature detection means of bottom.
On the other hand, the present invention adopts the following technical scheme that：
A kind of control method for being used to control heat pump as described above, the heat pump include being arranged on described change
The bottom of hot device or the second temperature detection means of bottom, the control method include：
Whether defrost branch road is to the outdoor heat exchange described in the temperature control detected according to the second temperature detection means
The bottom of device and/or bottom carry out defrost.
Preferably, the heat pump also includes the first temperature detection dress for being used to detect the Guan Wen of the outdoor heat exchanger
Put, the control method further comprises：
Heat pump heat pump according to the temperature control that first temperature-detecting device detects is heating
Switch between module and defrost pattern.
Preferably, the heat pump includes the second temperature detection dress for being arranged on the bottom of the heat exchanger or bottom
Put, the control method includes：
The heat pump in a heating mode, makes a reservation for when the temperature of second temperature detection means detection is less than the 3rd
During temperature, first pipeline and the second pipeline are opened in control, until the temperature of second temperature detection means detection is high
First pipeline and second pipeline are closed in control when four predetermined temperatures.
Preferably, the heat pump also includes four-way valve, and the gas exhaust piping of the compressor in a heating mode is institute
The connecting line between the exhaust outlet of compressor and the four-way valve is stated, the control method includes：
For the heat pump under defrost pattern, first pipeline and the second pipeline are opened in control.
Preferably, one end of the heat exchanger tube also passes through the 3rd pipeline and the outdoor heat exchanger in a heating mode cold
Matchmaker's export pipeline connects, the other end of the heat exchanger tube also by the 4th pipeline and the outdoor heat exchanger in a heating mode
Refrigerant inlet pipeline connects, and the control method also includes：
The heat pump in a heating mode, makes a reservation for when the temperature of second temperature detection means detection is less than the 3rd
During temperature, the 3rd pipeline and the 4th pipeline are closed in control, until the temperature of second temperature detection means detection
The 3rd pipeline and the 4th pipeline are opened in control when degree is higher than four predetermined temperatures.
It is provided with heat pump provided by the invention and carries out defrost for the bottom to outdoor heat exchanger and/or bottom
Defrost branch road, when heat pump runs heating mode, the high-temperature exhaust air of compressor can be incorporated into outdoor and changed by defrost branch road
The bottom and/or bottom of hot device are heated to it, so as to avoid because the bottom of outdoor heat exchanger and bottom defrost be not thorough
The problem of heating efficiency caused by and is low, high energy consumption, in addition, defrost branch road will enter in the bottom of outdoor heat exchanger and/or bottom
Refrigerant after row heat exchange introduces the upstream side of outdoor heat exchanger so that refrigerant can be again introduced into outdoor heat exchanger and be evaporated
Heat absorption, on the one hand ensure that heating efficiency, reduces efficiency consume, on the other hand can avoid impact of the refrigerant to pipeline, protects
Demonstrate,prove the operational reliability of heat pump.
Brief description of the drawings
By the description to the embodiment of the present invention referring to the drawings, above-mentioned and other purpose of the invention, feature and
Advantage will be apparent from, in the accompanying drawings：
Fig. 1 shows a kind of structural representation of the heat pump of structure type provided by the invention；
Fig. 2 shows the enlarged drawing at A in Fig. 1；
Fig. 3 shows the structural representation of the heat pump of another structure type provided by the invention；
Fig. 4 shows the enlarged drawing at B in Fig. 3.
In figure, 1, compressor；2nd, four-way valve；3rd, outdoor heat exchanger；4th, indoor heat exchanger；5th, electric expansion valve；6th, gas-liquid
Separator；7th, oil eliminator；8th, current divider；9th, discharge；10th, the first temperature-sensitive bag；11st, defrost branch road；111st, the first pipeline；
112nd, the second pipeline；113rd, the 3rd pipeline；114th, the 4th pipeline；115th, the first magnetic valve；116th, second solenoid valve；117th, the 3rd
Magnetic valve；118th, the 4th magnetic valve；119th, heat exchanger tube；12nd, the second temperature-sensitive bag；13rd, subcooler；14th, subcooler electric expansion valve.
Embodiment
Below based on embodiment, present invention is described, but the present invention is not restricted to these embodiments.Under
It is detailed to describe some specific detail sections in the literary detailed description to the present invention.Do not have for a person skilled in the art
The description of these detail sections can also understand the present invention completely.In order to avoid obscuring the essence of the present invention, known method, mistake
The not narration in detail of journey, flow, element.
In addition, it should be understood by one skilled in the art that provided herein accompanying drawing be provided to explanation purpose, and
What accompanying drawing was not necessarily drawn to scale.
Unless the context clearly requires otherwise, otherwise entire disclosure is similar with the " comprising " in claims, "comprising" etc.
Word should be construed to the implication included rather than exclusive or exhaustive implication；That is, it is containing for " including but is not limited to "
Justice.
In the description of the invention, it is to be understood that term " first ", " second " etc. are only used for describing purpose, without
It is understood that to indicate or implying relative importance.In addition, in the description of the invention, unless otherwise indicated, the implication of " multiple "
It is two or more.
This application provides a kind of heat pump, as shown in figures 1 and 3, pressure is provided with the refrigerant flow of heat pump
Contracting machine 1, four-way valve 2, outdoor heat exchanger 3, indoor heat exchanger 4 and restricting element, so as to form the circulation loop of refrigerant, wherein,
The switching of heat pump operational mode can be realized by the commutation of four-way valve 2.It is provided with and is used on the air inlet pipeline of compressor 1
Gas-liquid separation is carried out to refrigerant, avoids the gas-liquid separator 6 of the absorbing gas belt liquid of compressor 1, is provided with the gas exhaust piping of compressor 1
The oil eliminator 7 that lubricating oil in the refrigerant of discharge is separated.Restricting element can be that arbitrarily refrigerant can be saved
The structure of stream, such as can be capillary, electric expansion valve etc., it can be provided only on outside, can also indoor and room
There is setting in outside, and different control is carried out to the restricting element of diverse location when heat pump runs different patterns.
In the application, restricting element is the electric expansion valve 5 of the outside for being arranged on heat pump shown in Fig. 2 and Fig. 4.
Preferably, a plurality of refrigerant flow in parallel is provided with outdoor heat exchanger 3, a plurality of refrigerant flow in parallel is heating
Arrival end under pattern is connected with current divider 8, and the port of export is connected with discharge 9, when heat pump runs heating mode,
Refrigerant is separately flowed into a plurality of refrigerant flow in parallel by current divider 8, and the refrigerant after heat exchange imports discharge 9, and discharge 9 will
The refrigerant collected is drawn.
In the common method for judging outdoor heat exchanger 3 and whether needing progress defrost, it is provided with outdoor heat exchanger 3
For detecting its Guan Wen the first temperature-detecting device, the first temperature-sensitive bag 10 shown in for example, Fig. 2 and Fig. 4, when the first sense
The temperature that thermometer bulb 10 detects judges that outdoor heat exchanger 3 needs progress defrost when be less than the first predetermined temperature, now heat pump by
Heating mode switches to defrost pattern, and four-way valve 2 commutates, and the high temperature refrigerant discharged using compressor 1 is carried out to outdoor heat exchanger 3
Defrost, and when the temperature of the first temperature-sensitive bag 10 detection is higher than the second predetermined temperature, judge that the defrost of outdoor heat exchanger 3 finishes, this
When heat pump heating mode switched back into by defrost pattern continued to indoor heating.Due to the Action of Gravity Field of refrigerant, outdoor heat exchange
The bottom refrigerant of device 3 is more, therefore the bottom frost of outdoor heat exchanger 3 detects than more serious when the first temperature-sensitive bag 10
When temperature is higher than the second predetermined temperature, the frost of bottom is not often removed thoroughly, for this problem, in the application, is set and is used
In the defrost branch road 11 that defrost is carried out to the bottom of outdoor heat exchanger 3 and/or bottom, when heat pump runs heating mode,
One end of defrost branch road 11 can be connected with the blast pipe of compressor 1, be changed so as to which the high-temperature exhaust air of compressor 1 is incorporated into outdoor
The bottom and/or bottom of hot device 3 are heated to it, avoid due to the bottom of outdoor heat exchanger 3 and bottom defrost it is not thorough and
Caused by the problem of heating efficiency is low, high energy consumption.The other end of defrost branch road 11 has access to the upstream side of outdoor heat exchanger 3,
So as to which the refrigerant after the bottom of outdoor heat exchanger 3 and/or bottom are exchanged heat to be introduced to the upstream side of outdoor heat exchanger 3, make
Refrigerant can be again introduced into outdoor heat exchanger 3 and be evaporated heat absorption, on the one hand ensure that heating efficiency, reduce efficiency and consume
Damage, on the other hand can avoid impact of the refrigerant to pipeline, ensure the operational reliability of heat pump.It will of course be understood that
It is that the defrost branch road 11 that the application provides can be used for carrying out defrost to the other positions of outdoor heat exchanger 3.
Preferably, the pipeline that the other end of defrost branch road 11 is had access between outdoor heat exchanger 3 and electric expansion valve 5
In, conflux with the refrigerant after the throttling of electric expansion valve 5, then branched to through current divider 8 in each refrigerant flow.
Preferably, for convenience of the setting of defrost branch road 11, structure is simplified, defrost branch road 11 includes being disposed in the outdoor heat exchanger
3 bottom and/or the heat exchanger tube 119 of bottom, for example, as shown in Figure 2, being located at one of foot using outdoor heat exchanger 3
Heat exchanger tube 119 of the pipeline as defrost branch road 11 where refrigerant flow, in the embodiment shown in Figure 2, heat exchanger tube 119 is by four
Bar branch pipe (two rows two arrange) is in turn connected to form, one end (i.e. refrigerant of the heat pump when running heating mode of heat exchanger tube 119
The port of export) it is connected through the 3rd pipeline 113 with the heating export pipeline of outdoor heat exchanger 3, heating export pipeline is that heat pump exists
The refrigerant exit pipeline of outdoor heat exchanger 3 when running heating mode, in the embodiment shown in Figure 2, the 3rd pipeline 113 and gas collection
Pipe 9 connects, and the other end (i.e. refrigerant inlet end of the heat pump when running heating mode) of heat exchanger tube 119 is through the 4th pipeline
114 are connected with the heating entrance pipe of outdoor heat exchanger 3, and heating entrance pipe is heat pump when running heating mode outside room
The refrigerant inlet pipeline of heat exchanger 3, in the embodiment shown in Figure 2, the 4th pipeline 114 is connected with current divider 8.Heat exchanger tube 119
One end be also connected by gas exhaust piping of first pipeline 111 with compressor 1 in a heating mode, i.e., heat pump operation make
The pipeline being connected during heat pattern with its exhaust outlet, the connecting line that can be connected between the exhaust outlet of compressor 1 and four-way valve 2
On, it can also be connected to as shown in fig. 1 on the connecting line between four-way valve 2 and indoor heat exchanger 4.Heat exchanger tube 119 it is another
One end is also accessed in the pipeline between outdoor heat exchanger 3 and electric expansion valve 5 by the second pipeline 112.In this way, pass through control the
One to the 4th pipeline is opened and closed to control on-position of the heat exchanger tube 119 in heat pump, and then utilizes defrost branch road
11 pairs of outdoor heat exchangers 3 carry out the effect of defrost.
Specifically, the first switch device for controlling the opening and closing of the first pipeline 111, example are provided with the first pipeline 111
For the first magnetic valve 115 as shown in Fig. 2, similarly, second switch device is provided with the second pipeline 112, for example,
Two magnetic valves 116, are provided with the 3rd switching device, for example, the 3rd magnetic valve 117 on the 3rd pipeline 113, on the 4th pipeline 114
It is provided with the 4th switching device, for example, the 4th magnetic valve 118.First magnetic valve 115 and second solenoid valve 116 are opened, the
When the valve of three electromagnetism 117 and the 4th magnetic valve 118 are closed, then defrost branch road 11 can utilize the high temperature refrigerant pair that compressor 1 is discharged
Outdoor heat exchanger 3 carries out defrost, and the first magnetic valve 115 and second solenoid valve 116 are closed, the 3rd magnetic valve 117 and the 4th electricity
When magnet valve 118 is opened, then the heat exchanger tube 119 in defrost branch road 11 can participate in heat pump as a part for outdoor heat exchanger 3
Normal heating and process of refrigerastion.Due to being by the use of the heat exchanger tube 119 in outdoor heat exchanger 3 as defrost branch road 11, can facilitate
Ground is transformed on existing heat pump, reduces the design cost of heat exchanger, is facilitated the upgrading of old product and is improved.
It is further preferred that second temperature detection means is provided with the bottom of outdoor heat exchanger 3 or bottom, such as
In embodiment shown in Fig. 2, the second temperature-sensitive bag 12 is provided with the bottom of outdoor heat exchanger 3, it is preferable that in the height direction,
Second temperature-sensitive bag 12, can root when heat pump runs heating mode between two branch pipes up and down for forming heat exchanger tube 119
Control whether defrost branch road 11 carries out defrost to outdoor heat exchanger 3 according to the temperature of the second temperature-sensitive bag 12 detection.Preferably, second
Temperature-sensitive bag 12 is set close to the fin of outdoor heat exchanger 3, and apart from the fin preset distance of outdoor heat exchanger 3, for example, predetermined
Distance is 3 to 7mm, preferably 5mm.It is further preferred that the bearing of trend of the second temperature-sensitive bag 12 and the bearing of trend of fin are in
Predetermined angular is set, it is preferable that the bearing of trend of the second temperature-sensitive bag 12 and the bearing of trend of fin are mutually perpendicular to.Specifically, exist
When heat pump runs heating mode, when the temperature of the second temperature-sensitive bag 12 detection is less than three predetermined temperatures, illustrate that outdoor is changed
The bottom frosting of hot device 3 now controls defrost branch road 11 to carry out defrost to outdoor heat exchanger 3 than more serious, and when the second temperature-sensitive
When the temperature of the detection of bag 12 is higher than four predetermined temperatures, illustrates that defrost is completed, now defrost branch road 11 can be taken back system again
In hot refrigerant circulation stream.For example, in the embodiment shown in Figure 2, when the temperature of the second temperature-sensitive bag 12 detection is pre- less than the 3rd
When constant temperature is spent, control and open the first magnetic valve 115 and second solenoid valve 116, the 3rd magnetic valve 117 and the 4th magnetic valve 118
Close, until control is electric by the first magnetic valve 115 and second when the temperature of the second temperature-sensitive bag 12 detection is higher than four predetermined temperatures
Magnet valve 116 is closed, and the 3rd magnetic valve 117 and the 4th magnetic valve 118 are opened.
Further, also according to the temperature that the first temperature-sensitive bag 10 detects heat pump can be controlled to carry out conventional defrost
Journey, specifically, when the temperature of the first temperature-sensitive bag 10 detection is less than the first predetermined temperature, judge that outdoor heat exchanger 3 needs to carry out
Defrost, now heat pump defrost pattern is switched to by heating mode, four-way valve 2 commutates, using compressor 1 discharge high temperature it is cold
Matchmaker carries out defrost to outdoor heat exchanger 3, and when the temperature of the first temperature-sensitive bag 10 detection is higher than the second predetermined temperature, judge outdoor
The defrost of heat exchanger 3 finishes, and now heat pump switches back into heating mode by defrost pattern and continued to indoor heating.In heat pump
When running defrost pattern, the second temperature-sensitive bag 12 can not work, until after heat pump switches to heating mode by defrost pattern
Just start working.
Preferably, subcooler 13 is additionally provided between electric expansion valve 5 and indoor heat exchanger 4, is made by subcooler 13
Further cooling throttles and freezed to be sent into throttling arrangement the medium temperature highly pressurised liquid that condenser comes out, and improves the operation of heat pump
Efficiency.The heating outlet of subcooler 13 has two branch roads, and a branch road is connected with electric expansion valve 5, another equal energy of branch road
Enough subcooler electric expansion valves 14 are back in subcooler 13, are then introduced in gas-liquid separator 6.
In alternate embodiments, defrost branch road 11 can also be an independent branch road, as shown in Figure 3 and Figure 4, in room
The bottom of external heat exchanger 3 is separately provided a heat exchanger tube 119, and the heat exchanger tube 119 is not connected with current divider 8 and discharge 9, heat exchange
One end of pipe 119 is connected by the first pipeline 111 with the heating gas exhaust piping of compressor 1, can be connected to the exhaust of compressor 1
On connecting line between mouth and four-way valve 2, it can also be connected to as shown in fig. 1 between four-way valve 2 and indoor heat exchanger 4
On connecting line.The other end of heat exchanger tube 119 is accessed between outdoor heat exchanger 3 and electric expansion valve 5 by the second pipeline 112
In pipeline.First magnetic valve 115 is set on first pipeline 111, second solenoid valve 116 is set on the second pipeline 112.Preferably,
One end of heat exchanger tube 119 is connected on the connecting line between the exhaust outlet of compressor 1 and four-way valve 2, so so that this implementation
Defrost branch road 11 in example is formed as independent stream, can control opening and closing according to defrost demand, not influenceed by heating mode,
I.e. no matter heat pump runs (including heating mode and defrost pattern) in what mode, can all be entered using defrost branch road 11
Row defrost, in a specific embodiment, when heat pump runs heating mode, when the temperature of the second temperature-sensitive bag 12 detection
During less than three predetermined temperatures, control and open the first pipeline 111 and the second pipeline 112, until the detection of the second temperature-sensitive bag 12
The first pipeline 111 and the second pipeline 112 are closed in control when temperature is higher than four predetermined temperatures.When heat pump runs defrost mould
During formula, directly the first pipeline 111 and the second pipeline 112 can be opened.
For those skilled in the art it is easily understood that on the premise of not conflicting, above-mentioned each preferred scheme can be free
Ground combination, superposition.
It should be appreciated that above-mentioned embodiment is only illustrative, and not restrictive, without departing from the basic of the present invention
In the case of principle, those skilled in the art can be directed to the various obvious or equivalent modification made of above-mentioned details or replace
Change, be all included in scope of the presently claimed invention.
Claims (13)
1. a kind of heat pump, it is characterised in that compressor, outdoor heat exchange are provided with the refrigerant flow of the heat pump
Device, indoor heat exchanger and restricting element, in addition to for carrying out the defrost branch road of defrost to the outdoor heat exchanger, in the heat
When pumping system runs heating mode, one end of the defrost branch road can be connected with the blast pipe of the compressor, other end energy
Enough access the upstream side of the outdoor heat exchanger.
2. heat pump according to claim 1, it is characterised in that the other end of the defrost branch road has access to described
In pipeline between outdoor heat exchanger and the restricting element.
3. heat pump according to claim 1, it is characterised in that the defrost branch road changes including being arranged on the outdoor
The bottom of hot device and/or the heat exchanger tube of bottom.
4. heat pump according to claim 3, it is characterised in that one end of the heat exchanger tube passes through the first pipeline and institute
State the gas exhaust piping connection of compressor in a heating mode, the other end by the second pipeline access the outdoor heat exchanger with it is described
In pipeline between restricting element.
5. heat pump according to claim 4, it is characterised in that first switch dress is provided with first pipeline
Put；And/or
Second switch device is provided with second pipeline.
6. heat pump according to claim 4, it is characterised in that one end of the heat exchanger tube also by the 3rd pipeline with
The refrigerant exit pipeline connection of the outdoor heat exchanger in a heating mode, the other end of the heat exchanger tube also pass through the 4th pipeline
It is connected with the refrigerant inlet pipeline of the outdoor heat exchanger in a heating mode.
7. heat pump according to claim 6, it is characterised in that the 3rd switch dress is provided with the 3rd pipeline
Put；And/or
The 4th switching device is provided with 4th pipeline.
8. the heat pump according to one of claim 1 to 7, it is characterised in that the heat pump also includes being used to examine
The first temperature-detecting device for surveying the Guan Wen of the outdoor heat exchanger and the bottom for being arranged on the outdoor heat exchanger or under
The second temperature detection means in portion.
9. a kind of control method for being used to control the heat pump as described in one of claim 1 to 8, it is characterised in that described
Heat pump includes being arranged on the bottom of the heat exchanger or the second temperature detection means of bottom, the control method bag
Include：
Whether defrost branch road is to the outdoor heat exchanger described in the temperature control detected according to the second temperature detection means
Bottom and/or bottom carry out defrost.
10. control method according to claim 9, it is characterised in that the heat pump also includes described for detecting
The Guan Wen of outdoor heat exchanger the first temperature-detecting device, the control method further comprise：
The heat pump according to the temperature control that first temperature-detecting device detects heat pump in heating module
Switch between defrost pattern.
11. a kind of control method for being used to control the heat pump as described in one of claim 4 to 7, it is characterised in that described
Heat pump includes being arranged on the bottom of the heat exchanger or the second temperature detection means of bottom, the control method bag
Include：
The heat pump in a heating mode, when the second temperature detection means detection temperature be less than the 3rd predetermined temperature
When, first pipeline and the second pipeline are opened in control, until the temperature of second temperature detection means detection is higher than the
First pipeline and second pipeline are closed in control during four predetermined temperatures.
12. control method according to claim 11, it is characterised in that the heat pump also includes four-way valve, described
Connecting line of the gas exhaust piping of compressor in a heating mode between the exhaust outlet of the compressor and the four-way valve, institute
Stating control method includes：
For the heat pump under defrost pattern, first pipeline and the second pipeline are opened in control.
13. the control method of heat pump according to claim 11, it is characterised in that one end of the heat exchanger tube is also logical
Cross the refrigerant exit pipeline of the 3rd pipeline with the outdoor heat exchanger in a heating mode to be connected, the other end of the heat exchanger tube is also
It is connected by refrigerant inlet pipeline of the 4th pipeline with the outdoor heat exchanger in a heating mode, the control method is also wrapped
Include：
The heat pump in a heating mode, when the second temperature detection means detection temperature be less than the 3rd predetermined temperature
When, the 3rd pipeline and the 4th pipeline are closed in control, until the temperature of second temperature detection means detection is high
The 3rd pipeline and the 4th pipeline are opened in control when four predetermined temperatures.
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|---|---|---|---|
| CN201710800326.6A CN107560217A (en) | 2017-09-07 | 2017-09-07 | Heat pump system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710800326.6A CN107560217A (en) | 2017-09-07 | 2017-09-07 | Heat pump system and control method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489130A (en) * | 2018-11-02 | 2019-03-19 | 珠海格力电器股份有限公司 | Heat exchanger, outdoor unit and air conditioner |
| CN110553328A (en) * | 2019-09-09 | 2019-12-10 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN110645746A (en) * | 2019-10-23 | 2020-01-03 | 珠海格力电器股份有限公司 | Continuous heating control system and method and air conditioning equipment |
| WO2021169539A1 (en) * | 2019-10-23 | 2021-09-02 | 珠海格力电器股份有限公司 | Circulation system and control method and device therefor, and air conditioner |
| CN115031439A (en) * | 2022-06-16 | 2022-09-09 | 江苏省华扬太阳能有限公司 | High-efficiency defrosting heat pump type large and medium air conditioning device |
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| CN115077119B (en) * | 2022-07-01 | 2024-04-09 | 江苏省华扬新能源有限公司 | Energy-saving air conditioner capable of quickly defrosting without stopping |
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