CN109798600A - Heat pump system, air conditioner, outdoor unit and control method of outdoor unit - Google Patents
Heat pump system, air conditioner, outdoor unit and control method of outdoor unit Download PDFInfo
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- CN109798600A CN109798600A CN201910216749.2A CN201910216749A CN109798600A CN 109798600 A CN109798600 A CN 109798600A CN 201910216749 A CN201910216749 A CN 201910216749A CN 109798600 A CN109798600 A CN 109798600A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 230000001105 regulatory effect Effects 0.000 claims abstract 5
- 238000001514 detection method Methods 0.000 claims description 19
- 238000004378 air conditioning Methods 0.000 claims description 8
- 239000000284 extract Substances 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000010257 thawing Methods 0.000 abstract 4
- 238000010438 heat treatment Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Abstract
The invention provides a heat pump system, an air conditioner, an outdoor unit and a control method of the outdoor unit. The outdoor unit comprises an outdoor heat exchanger, the outdoor heat exchanger comprises at least two heat exchanging parts which are arranged in parallel, a flow regulating mechanism is arranged between each heat exchanging part and the compressor, and the opening degree of each flow regulating mechanism is in direct proportion to the frosting degree of the heat exchanging parts. According to the heat pump system, the air conditioner, the outdoor unit and the control method of the outdoor unit, the outdoor heat exchanger of the outdoor unit is divided into an upper part and a lower part, the frosting degree of the corresponding heat exchanging part is detected by utilizing the pressure drop of the air flow, and the opening degree of the corresponding flow regulating mechanism is regulated according to the frosting degree, so that targeted defrosting is achieved, the reliability of defrosting is improved, the defrosting time is shortened, and the energy consumption of the heat pump system during defrosting is effectively reduced.
Description
Technical field
The present invention relates to frost-removal structure technical field, the control of especially a kind of heat pump system, air-conditioning, outdoor unit and outdoor unit
Method processed.
Background technique
Air source heat pump is as a kind of efficient warming mode, by feat of its heating efficiency height, it is environmentally friendly the advantages that just
It is promoted on a large scale.But air source heat pump is in the process of running, when environment temperature is lower than 0 DEG C, moisture in air can be
Outdoor heat exchanger fin surface forms frost, and as the heat pump working time continues, frost layer can gradually thicken, the increasing of frost layer degree
Adding, which not only influences heat transfer, can also make flow section of the air between fin become smaller, so that heat pump heating effect significantly reduces.Cause
When this heat pump air conditioner uses in winter, how defrost is that an important link is current, right when unit enters the defrost stage
The upper-lower section of outdoor heat exchanger is all while the defrost of equality strength, but the upper and lower section frosting of outdoor heat exchanger may and it is uneven,
The cold medium flux of unit supply condenser upper-lower section is identical when defrost, if lower section frosting occur when frostless upper section, in this way
Defrost mode the idle work of compressor can be made to increase, so that increasing the accuracy of energy consumption and defrost cannot also ensure.
Summary of the invention
In order to solve the non-uniform technical problem of outdoor unit defrost, and provide a kind of heat pump system according to frosting situation defrost
The control method of system, air-conditioning, outdoor unit and outdoor unit.
A kind of outdoor unit, including outdoor heat exchanger, the outdoor heat exchanger include at least two heat exchanging part being arranged in parallel,
Be provided with a flow control device between each heat exchanging part and compressor, and the aperture of the flow control device with
Frosting degree in the heat exchanging part is directly proportional.
The outdoor unit further includes frosting degree detecting mechanism, and frosting degree detecting mechanism is set at least two institutes
It states on the surface of heat exchanging part, and frosting degree detecting mechanism is electrically connected with the flow control device.
Frosting degree detecting mechanism includes the pressure sensor for detecting the heat exchanging part air-flow pressure drop.
It is N that N number of pressure sensor quantity is arranged in each heat exchanging part, and is obtained according to formula:
Wherein: B1 is the heat exchange area of heat exchanging part；
B is setting value.
Frosting degree detecting mechanism includes multiple for detecting the pressure sensor of the heat exchanging part air-flow pressure drop, institute
There is the pressure sensor to be set on the outside windward side of the corresponding heat exchanging part.
All pressure sensors are uniformly distributed.
The outdoor unit further includes control mechanism, and the control mechanism extracts the data of frosting degree detecting mechanism,
And the aperture of the corresponding flow control device is controlled using the data.
The distribution up and down along the vertical direction of two heat exchanging part.
A kind of heat pump system, including above-mentioned outdoor unit.
A kind of air-conditioning, including above-mentioned outdoor unit.
A kind of control method of above-mentioned outdoor unit, comprising:
The frosting degree D of S1, each heat exchanging part of detection；
S2, the aperture X for adjusting the flow control device in real time according to the frosting degree.
Frosting degree detecting mechanism includes multiple pressure sensors, and all pressure sensors are uniformly distributed in pair
On the outer surface for the heat exchanging part answered, and in step sl, all pressure sensings in the same heat exchanging part are detected
The pressure drop data of device obtains the frosting degree.
It in step sl further include that the detection cycle of frosting degree detecting mechanism is T.
Further include in step sl, set frosting temperature t0, detect the outdoor unit local environment temperature t1, compare t1 and
T0, and detection cycle is corrected according to the comparison result of t1 and t0.
In the detection cycle for correcting frosting degree detecting mechanism according to the comparison result of t1 and t0, comprising:
If t1 > t0, the detection cycle T=k1t1；
If t1≤t0, the detection cycle T=k2t1；
K1 and k2 is constant value, and k1 ≠ k2.
The electric current for extracting the corresponding pressure sensor believes the aperture that the electric current is converted into flow control device
Number, and adjust using the opening amount signal aperture of the corresponding flow control device.
It in step s 2, further include setting the first frosting degree value D1 and the second frosting degree value D2, D2 > D1 > 0, to D
It is compared with D1 and D2, and adjusts the aperture X of the flow control device according to comparison result.
D is being compared with D1 and D2, and is being adjusted according to comparison result in the aperture X of the flow control device (2),
Further include:
As D < D1, X=0；
As D1≤D < D2, X=q1*D；
As D > D2, X=q2*D；
Wherein q1 and q2 is constant, and q1 ≠ q2.
The control method of heat pump system provided by the invention, air-conditioning, outdoor unit and outdoor unit, by the outdoor heat exchange of outdoor unit
Device is divide into upper part and lower part, and using the frosting degree of the corresponding heat exchanging part of air-flow voltage drop detection, according to the adjusting pair of frosting degree
The aperture for the flow control device answered improves the reliability of defrost to reach specific aim defrost, reduces the defrost time, effectively
Reduce energy consumption of the heat pump system in defrost.
Detailed description of the invention
Fig. 1 is the heat pump of the embodiment of the control method of heat pump system provided by the invention, air-conditioning, outdoor unit and outdoor unit
The structural schematic diagram of system；
In figure:
1, heat exchanging part；2, flow control device；3, pressure sensor.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, right with reference to the accompanying drawings and embodiments
The present invention is further elaborated.It should be appreciated that described herein, the specific embodiments are only for explaining the present invention, not
For limiting the present invention.
Outdoor unit as shown in Figure 1, including outdoor heat exchanger, the outdoor heat exchanger include at least two be arranged in parallel
Heat exchanging part 1 is provided with a flow control device 2 between each heat exchanging part 1 and compressor, and the flow adjusts machine
The aperture of structure 2 is directly proportional to the frosting degree in the heat exchanging part, and the aperture of flow control device 2 is adjusted using frosting degree,
The flow for the high temperature and pressure refrigerant for entering corresponding heat exchanging part 1 is controlled, the knot of the flow of refrigerant with corresponding heat exchanging part 1 is made
White degree matches, and carries out accurate defrost, to reduce the defrost time, improves the reliability of defrost, reduces the defrost time, effectively
Reduce energy consumption of the heat pump system in defrost.
The outdoor unit further includes frosting degree detecting mechanism, and frosting degree detecting mechanism is set at least two institutes
It states on the surface of heat exchanging part, and frosting degree detecting mechanism is electrically connected with the flow control device, utilizes frosting degree
Frosting degree detects in testing agency, to adjust the aperture of flow control device.
Frosting degree detecting mechanism includes the pressure sensor for detecting the heat exchanging part air-flow pressure drop.
It is N that N number of pressure sensor quantity is arranged in each heat exchanging part, and is obtained according to formula:
Wherein: B1 is the heat exchange area of heat exchanging part；
B is setting value.
Frosting degree detecting mechanism includes multiple for detecting the pressure sensor 3 of the 1 air-flow pressure drop of heat exchanging part,
All pressure sensors 3 are set on the outside windward side of the corresponding heat exchanging part 1.
All pressure sensors 3 be uniformly distributed namely each frosting degree detecting mechanism included by own
Pressure sensor 3 is arranged in the heat exchanging part of frosting degree detecting mechanism setting, and air flows through pressure when outdoor heat exchanger
Power drop is related with frosting degree, and the pressure sensor 3 on heat exchanger carries out the degree of frosting by the size of induction pressure
Judgement, exists between frosting degree (D) and pressure drop (P): D=y*P, (y ≠ 0 is related coefficient).
The outdoor unit further includes control mechanism, and the control mechanism extracts the data of frosting degree detecting mechanism,
And the aperture of the corresponding flow control device 2 is controlled using the data, the data include the degree of frosting, pressure drop etc.
Data, between aperture (X) and frosting degree (D): X=q1*D (D1≤D < D2, D1 > 0), X=q2*D (D > D2).
It is that gradually the frosting degree of frosting namely its underpart is greater than from the bottom to top since outdoor heat exchanger is in frosting
Or the frosting degree much larger than top, therefore the distribution up and down along the vertical direction by two heat exchanging part.
A kind of heat pump system, including above-mentioned outdoor unit.
A kind of air-conditioning, including above-mentioned outdoor unit.
A kind of control method of above-mentioned outdoor unit, comprising:
The frosting degree of S1, each heat exchanging part 1 of detection, wherein the result of detection frosting degree can be passed according to pressure
The pressure drop that sensor 3 detects carries out conversion and obtains；
S2, the aperture for adjusting the flow control device in real time according to the frosting degree.
Frosting degree detecting mechanism includes multiple pressure sensors 3, and all pressure sensors 3 are uniformly distributed in
On the outer surface of the corresponding heat exchanging part 1, and in step sl, all pressure in the same heat exchanging part 1 are detected
The pressure drop data of sensor 3 obtains the frosting degree, wherein being averaged for the pressure drop data of all pressure sensors 3
Value, or the maximum value in all pressure drop datas.
It in step sl further include that the detection cycle of frosting degree detecting mechanism is T.
Further include in step sl, set frosting temperature t0, detect the outdoor unit local environment temperature t1, compare t1 and
T0, and detection cycle is corrected according to the comparison result of t1 and t0.
In the detection cycle for correcting frosting degree detecting mechanism according to the comparison result of t1 and t0, comprising:
If t1 > t0, the detection cycle T=k1t1；
If t1≤t0, the detection cycle T=k2t1；
K1 and k2 is constant value, and k1 ≠ k2, it is possible to reduce the time of defrost, and the energy of compressor can be reduced
Consumption is realized and is segmented accurate defrost.
The electric current for extracting the corresponding pressure sensor 3 believes the aperture that the electric current is converted into flow control device 2
Number, and adjust using the opening amount signal aperture of the corresponding flow control device 2.
Basic heat exchange area B is set, and determines the heat exchange area B1 of each heat exchanging part, the ratio according to B and B1 is true
The quantity N of level pressure force snesor.
In the quantity for determining pressure sensor according to the ratio of B and B1, further includes:
If B1 >=B, then N=(B1/B)+2；
If B1 < B, N=2.
It in step s 2, further include setting the first frosting degree value D1 and the second frosting degree value D2, D2 > D1 > 0, to D
It is compared with D1 and D2, and adjusts the aperture X of the flow control device 2 according to comparison result.
D is being compared with D1 and D2, and is being adjusted according to comparison result in the aperture X of the flow control device 2, also
Include:
As D < D1, X=0；
As D1≤D < D2, X=q1*D；
As D > D2, X=q2*D；
Wherein q1 and q2 is constant, and q1 ≠ q2.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (18)
1. a kind of outdoor unit, including outdoor heat exchanger, it is characterised in that: the outdoor heat exchanger includes at least two be arranged in parallel
A heat exchanging part is provided with a flow control device (2), and the flow between each heat exchanging part (1) and compressor
The aperture of regulating mechanism (2) is directly proportional to the frosting degree on the heat exchanging part (1).
2. outdoor unit according to claim 1, it is characterised in that: the outdoor unit further includes frosting degree detecting mechanism,
Frosting degree detecting mechanism is set on the surface of at least two heat exchanging part (1), and the frosting degree detecting machine
Structure is electrically connected with the flow control device (2).
3. outdoor unit according to claim 2, it is characterised in that: frosting degree detecting mechanism includes for detecting
State the pressure sensor (3) of heat exchanging part (1) air-flow pressure drop.
4. outdoor unit according to claim 3, it is characterised in that: N number of pressure is arranged in each heat exchanging part and passes
Sensor quantity, N are obtained according to formula:
Wherein: B1 is the heat exchange area of heat exchanging part；
B is setting value.
5. outdoor unit according to claim 3, it is characterised in that: all pressure sensors (3) are set to described change
On the outside windward side of hot portion (1).
6. outdoor unit according to claim 3, it is characterised in that: all pressure sensors (3) are uniformly distributed.
7. outdoor unit according to claim 2, it is characterised in that: the outdoor unit further includes control mechanism, the control
Mechanism extracts the data of frosting degree detecting mechanism, and controls the corresponding flow control device using the data
(2) aperture.
8. outdoor unit according to claim 1, it is characterised in that: the distribution up and down along the vertical direction of two heat exchanging part.
9. a kind of heat pump system, it is characterised in that: including outdoor unit described in any item of the claim 1 to 8.
10. a kind of air-conditioning, it is characterised in that: including outdoor unit described in any item of the claim 1 to 8.
11. a kind of control method of outdoor unit described in any item of the claim 1 to 8, it is characterised in that: include:
S1, the frosting degree D for detecting each heat exchanging part (1)；
S2, the aperture X for adjusting the flow control device in real time according to the frosting degree D.
12. control method according to claim 11, it is characterised in that: frosting degree detecting mechanism includes multiple pressures
Force snesor (3), and in step sl, by detecting all pressure sensors (3) on the same heat exchanging part (1)
Pressure drop data obtains the frosting degree.
13. control method according to claim 11, it is characterised in that: in step sl further include the frosting degree
The detection cycle of testing agency is T.
14. control method according to claim 13, it is characterised in that: in step sl further include setting frosting temperature
T0 detects the outdoor unit local environment temperature t1, compares t1 and t0, and correct the frosting according to the comparison result of t1 and t0
The detection cycle of degree detecting mechanism.
15. control method according to claim 11, it is characterised in that: according to the amendment of the comparison result of t1 and t0
In the detection cycle of frosting degree detecting mechanism, comprising:
If t1 > t0, the detection cycle T=k1t1；
If t1≤t0, the detection cycle T=k2t1；
K1 and k2 is constant value, and k1 ≠ k2.
16. control method according to claim 11, it is characterised in that: extract the corresponding pressure sensor (3)
Electric current converts the electric current to the opening amount signal of flow control device (2), and adjusts corresponding institute using the opening amount signal
State the aperture of flow control device (2).
17. control method according to claim 11, it is characterised in that: further include the first frosting of setting in step s 2
Degree value D1 and the second frosting degree value D2, D2 > D1 > 0, D is compared with D1 and D2, and adjusts institute according to comparison result
State the aperture X of flow control device (2).
18. control method according to claim 17, it is characterised in that: D is being compared with D1 and D2, and according to than
Relatively result is adjusted in the aperture X of the flow control device (2), further includes:
As D < D1, X=0；
As D1≤D < D2, X=q1*D；
As D > D2, X=q2*D；
Wherein q1 and q2 is constant, and q1 ≠ q2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910216749.2A CN109798600A (en) | 2019-03-20 | 2019-03-20 | Heat pump system, air conditioner, outdoor unit and control method of outdoor unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910216749.2A CN109798600A (en) | 2019-03-20 | 2019-03-20 | Heat pump system, air conditioner, outdoor unit and control method of outdoor unit |
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| CN109798600A true CN109798600A (en) | 2019-05-24 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110440489A (en) * | 2019-08-08 | 2019-11-12 | 珠海格力电器股份有限公司 | Pressure difference adjustable defrosting control method and device and heating unit |
| CN112361635A (en) * | 2020-10-30 | 2021-02-12 | 珠海格力电器股份有限公司 | Heating control device and method of air conditioning system and air conditioning system |
| WO2021052193A1 (en) * | 2019-09-17 | 2021-03-25 | 青岛海尔空调电子有限公司 | Method for controlling balanced frosting of outdoor units in multi-split air-conditioning system |
| CN112880132A (en) * | 2021-01-29 | 2021-06-01 | 青岛海尔空调器有限总公司 | Method and device for defrosting control of air conditioning system and air conditioning system |
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