CN117212966A - Air conditioner air supplementing and enthalpy increasing device, control method and device and air conditioner - Google Patents
Air conditioner air supplementing and enthalpy increasing device, control method and device and air conditioner Download PDFInfo
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- CN117212966A CN117212966A CN202311282908.1A CN202311282908A CN117212966A CN 117212966 A CN117212966 A CN 117212966A CN 202311282908 A CN202311282908 A CN 202311282908A CN 117212966 A CN117212966 A CN 117212966A
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- 230000001502 supplementing effect Effects 0.000 title claims abstract description 139
- 238000000034 method Methods 0.000 title claims abstract description 56
- 239000003507 refrigerant Substances 0.000 claims abstract description 91
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 238000004378 air conditioning Methods 0.000 claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims description 32
- 101100129500 Caenorhabditis elegans max-2 gene Proteins 0.000 claims description 13
- 101100083446 Danio rerio plekhh1 gene Proteins 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 description 30
- 230000000694 effects Effects 0.000 description 16
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229940060587 alpha e Drugs 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
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Abstract
The invention provides an air-conditioning air-supplementing enthalpy-increasing device, a control method and device and an air conditioner. The air conditioner comprises an outdoor unit, an indoor unit and an air supplementing and enthalpy increasing device; wherein, be provided with gas pipeline and liquid pipeline between off-premises station and the indoor set, the off-premises station is provided with outdoor heat exchanger and compressor, and the device of increasing enthalpy of tonifying qi sets up in liquid pipeline, and is located between indoor set and the outdoor heat exchanger, and the device of increasing enthalpy of tonifying qi still includes: the plate heat exchanger is arranged on the liquid pipeline and is provided with a second refrigerant inlet and a second refrigerant outlet; the first air supplementing pipeline is connected with the second refrigerant inlet at a first end, connected with the liquid pipeline at a second end and located between the outdoor heat exchanger and the plate heat exchanger. The invention can solve the technical problems that the flow of the refrigerant is difficult to control in the air-conditioning air-supplementing enthalpy-increasing process, and the operation efficiency of the air-conditioning is further affected.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner air supplementing and enthalpy increasing device, a control method and device and an air conditioner.
Background
At present, when an air conditioner heats under a low-temperature working condition, the heating capacity is greatly attenuated, and only because the conditions of overlarge compression ratio, overlarge evaporation temperature and overlarge exhaust temperature exist in the air conditioner under the low-temperature environment, the heating capacity of the air conditioner is attenuated when the air conditioner heats, and the heating effect is further affected; the air supplementing and enthalpy increasing mode is generally adopted to improve the heating efficiency of low-temperature heating.
In the prior art, the air supplementing and enthalpy increasing mode is to add an electronic expansion valve, but the use requirement is difficult to meet due to the limited flow range of the electronic expansion valve. When the maximum flow of the electronic expansion valve is overlarge, and when the system is in low flow demand, the air conditioning system is easy to fluctuate due to the fact that the flow of the expansion valve is overlarge, steady-state demand is difficult to meet, and then the running efficiency of the air conditioner is reduced.
Disclosure of Invention
The invention can solve the technical problems that the flow of the refrigerant is difficult to control in the air-conditioning air-supplementing enthalpy-increasing process, and the operation efficiency of the air-conditioning is further affected.
In order to solve the problems, the invention provides an air conditioner air supplementing and enthalpy increasing device, wherein the air conditioner comprises an outdoor unit, an indoor unit and the air supplementing and enthalpy increasing device; wherein, be provided with gas pipeline and liquid pipeline between off-premises station and the indoor set, the off-premises station is provided with outdoor heat exchanger and compressor, and the device of increasing enthalpy of tonifying qi sets up in liquid pipeline, and is located between indoor set and the outdoor heat exchanger, and the device of increasing enthalpy of tonifying qi still includes: the plate heat exchanger is arranged on the liquid pipeline and is provided with a second refrigerant inlet and a second refrigerant outlet; the first end of the first air supplementing pipeline is connected to the second refrigerant inlet, the second end of the first air supplementing pipeline is connected to the liquid pipeline, and the second end of the first air supplementing pipeline is positioned between the outdoor heat exchanger and the plate heat exchanger; one end of the second air supplementing pipeline is connected to the second refrigerant outlet, and the other end of the second air supplementing pipeline is connected to an air supplementing port of the compressor; the first air supplementing pipeline is provided with a second expansion valve, a first air supplementing expansion valve and a second air supplementing expansion valve, and the first air supplementing expansion valve and the second air supplementing expansion valve are arranged in parallel; the air-supplementing and enthalpy-increasing device can realize air-supplementing and enthalpy-increasing of the air conditioner through the second expansion valve and the first air-supplementing expansion valve and/or through the second expansion valve and the second air-supplementing expansion valve.
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the first air supplementing expansion valve and the second air supplementing expansion valve are arranged in parallel in the air supplementing enthalpy increasing device, so that the accurate control of the air supplementing enthalpy increasing flow of the air conditioner is realized, in the process, the first air supplementing expansion valve or the second air supplementing expansion valve can be selected according to the size of the air supplementing enthalpy increasing flow of the system, or the first air supplementing expansion valve and the second air supplementing expansion valve can be regulated at the same time, and the air supplementing enthalpy increasing requirement of the air conditioning system is met; in the process, the fluctuation of the air conditioning system is reduced, the heating operation efficiency in low-temperature heating operation is improved, and the heating operation of the air conditioner is further stabilized.
Further, in the present invention, the plate heat exchanger is further provided with a first refrigerant inlet and a second refrigerant outlet, and the liquid pipeline includes a first liquid pipeline and a second liquid pipeline, wherein one end of the first liquid pipeline is connected to the indoor unit, the other end is connected to the first refrigerant inlet, one end of the second liquid pipeline is connected to the second refrigerant outlet, the other end is connected to the outdoor heat exchanger, and the first air supplementing pipeline is connected to the second liquid pipeline.
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the first liquid pipeline and the second liquid pipeline enable the air supplementing enthalpy increasing device to be capable of directly conveying the refrigerant flow to the compressor; in the process, the heating operation efficiency in the low-temperature heating operation is improved, and the heating operation of the air conditioner is further stabilized.
Further, in the present invention, the air-supplementing enthalpy-increasing device further includes: the first sensor is arranged at the position, close to the second refrigerant inlet, of the plate heat exchanger and is used for detecting the inlet temperature T of the refrigerant at the second refrigerant inlet Feeding in The method comprises the steps of carrying out a first treatment on the surface of the The second sensor is arranged at the position, close to the second refrigerant outlet, of the plate heat exchanger and is used for detecting the outlet temperature T of the refrigerant at the second refrigerant outlet Out of 。
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the arrangement of the first sensor and the second sensor realizes the inlet temperature T at the inlet of the second refrigerant Feeding in Outlet temperature T of refrigerant at second refrigerant outlet Out of Further by the inlet temperature T of the plate heat exchanger Feeding in Outlet temperature T Out of After detection, the superheat degree T of the plate heat exchanger can be obtained co At the same time according to the superheat degree T co The air conditioner control system controls the flow of the refrigerant in the outdoor unit pipeline, and can realize the air supplementing and enthalpy increasing of the compressor of the outdoor unit, thereby achieving the purpose of stabilizing the heat operation efficiency of the air conditioner.
Further, in the present invention, there is also provided a control method for air-conditioning air-supplementing enthalpy-increasing, the control method being applied to the air-conditioning air-supplementing enthalpy-increasing device, the control method comprising: when the air conditioner is in low-temperature heating operation, the air conditioner is operated according to the inlet temperature T Feeding in And outlet temperature T Out of Calculating superheat degree T of plate heat exchanger co The method comprises the steps of carrying out a first treatment on the surface of the According to the degree of superheat T co Judging whether the air conditioner meets the electromagnetic valve adjusting condition or not; if yes, controlling and adjusting the opening of the first air supplementing expansion valve and/or controlling and adjusting the opening of the second air supplementing expansion valve.
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: by the inlet temperature T at the second refrigerant inlet of the plate heat exchanger Feeding in Outlet temperature T of refrigerant at second refrigerant outlet Out of After detection, the superheat degree T of the plate heat exchanger can be obtained co According to the degree of superheat T co The air conditioner control system controls the flow of the refrigerant in the outdoor unit pipeline, and can realize the air supplementing and enthalpy increasing of the compressor of the outdoor unit, thereby achieving the purpose of stabilizing the heat operation efficiency of the air conditioner.
Further, in the present invention, according to the inlet temperature T Feeding in And outlet temperature T Out of Calculating superheat degree T of plate heat exchanger co Comprising the following steps: degree of superheat T co Outlet temperature T Out of Inlet temperature T Feeding in 。
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: it can be understood that the second refrigerant outlet in the plate heat exchanger is directly connected with the air supplementing port of the compressor through the second air supplementing pipeline, so that the pressure and the temperature of the refrigerant flowing from the plate heat exchanger to the compressor can influence the operation efficiency of the compressor, and the inlet temperature T is controlled by Feeding in Outlet temperature T Out of Detecting to obtain the superheat degree T co After that, the air-supplementing enthalpy-increasing device can finally realize air-supplementing enthalpy-increasing of the air conditioner by adjusting the flow of the refrigerant in the first air-supplementing pipeline and the second air-supplementing pipeline.
Further, in the present invention, controlling and adjusting the opening degree of the first air-supplementing expansion valve, and/or controlling and adjusting the opening degree of the second air-supplementing expansion valve includes: at the superheat degree T co The smaller the opening of the first air supplementing expansion valve is controlled, and/or the opening of the second air supplementing expansion valve is controlled to be smaller; and/or, at the superheat degree T co The larger the opening of the first air-supplementing expansion valve is, the larger the opening of the second air-supplementing expansion valve is.
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: degree of superheat T co The smaller the temperature T at the inlet of the plate heat exchanger Feeding in The smaller the difference between the air-conditioning unit and the outlet temperature Tout, the lower the superheat degree of the air-conditioning unit is, the unit is easy to return liquid, and the reliability of the unit is affected, in the process, the superheat degree T of the plate heat exchanger can be improved by reducing the opening degree of the first air-supplementing expansion valve and/or the second air-supplementing expansion valve co In such a way as to avoid liquid return in the air conditionerA situation; conversely, the degree of superheat T co The larger the temperature T at the inlet of the plate heat exchanger Feeding in And outlet temperature T Out of The larger the difference value is, the higher the superheat degree of the air-conditioner is, the insufficient air-supplementing quantity is indicated, the air-supplementing effect is affected, and the superheat degree T of the plate heat exchanger can be reduced by increasing the opening degree of the first air-supplementing expansion valve and/or the second air-supplementing expansion valve in the process co In order to avoid the condition of insufficient air supply in the air conditioner.
Further, in the present invention, determining whether the air conditioner satisfies the solenoid valve adjustment condition includes: at the superheat degree T co A first preset temperature value T less than or equal to 01 When the first air supplementing expansion valve is controlled, and/or the opening degree of the second air supplementing expansion valve is controlled to be reduced; and/or, at a first preset temperature value T 01 Less than the superheat degree T co A second preset temperature value T less than or equal to 02 When the air supply device is in operation, the first air supply expansion valve is controlled, and/or the second air supply expansion valve is controlled to keep running at the current opening; and/or, at the superheat degree T co > second preset temperature value T 02 And controlling the opening degree of the first air supplementing expansion valve and/or controlling the opening degree of the second air supplementing expansion valve to be increased.
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: over heat T co A first preset temperature value T less than or equal to 01 At this time, the degree of superheat T in the plate heat exchanger is indicated co Smaller, the superheat degree T can be increased by controlling the first air supplementing expansion valve and/or controlling the opening degree of the second air supplementing expansion valve to be reduced co Therefore, the heating efficiency of the air conditioner is ensured; a first preset temperature value T 01 Less than the superheat degree T co A second preset temperature value T less than or equal to 02 When the refrigerant in the liquid pipeline is in a gaseous state, the reliability of the unit can be ensured, and the air supplementing quantity of the air conditioner is maximized, so that the opening degrees of the first air supplementing expansion valve and the second air supplementing expansion valve do not need to be adjusted in the interval, and the air conditioner can be operated at the current opening degree; at the superheat degree T co > second preset temperature value T 02 At this time, the degree of superheat T in the plate heat exchanger is indicated co Larger at this time can be controlled byThe first air-supplementing expansion valve is manufactured and/or the opening degree of the second air-supplementing expansion valve is controlled to be increased so as to improve the superheat degree T co Thereby ensuring the heating efficiency of the air conditioner.
Further, in the present invention, the maximum flow rate Q of the first air-supplementing expansion valve max1 Maximum flow Q with the second air supplementing expansion valve max2 Different.
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: maximum flow Q of first air supplementing expansion valve max1 Maximum flow Q with the second air supplementing expansion valve max2 Different, realized the accurate regulation of tonifying qi and increased enthalpy flow, also satisfied the demand of different flow simultaneously, further promoted the operating efficiency of air conditioner.
Further, in the present invention, the maximum flow rate Q of the first air-supplementing expansion valve max1 Maximum flow Q with the second air supplementing expansion valve max2 The following are satisfied: q (Q) max1 ＝γ×Q max2 Wherein, gamma is a constant and gamma is 2,3]。
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the refrigerant flow is accurately controlled, the opening degree of the first air supplementing expansion valve and the opening degree of the second air supplementing expansion valve are effectively controlled, and the stability of heating operation of the air conditioner is further improved.
Further, in the present invention, the opening degree of the first air-supplementing expansion valve and the second air-supplementing expansion valve is in the range of [0pls,480pls ].
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the opening ranges of the first air supplementing expansion valve and the second air supplementing expansion valve are the same, and when the corresponding flow rates are different, the air supplementing enthalpy increasing device can meet the requirements of different flow rates, so that the heating operation efficiency of the air conditioner is ensured.
Further, the present invention also provides an air conditioner control device, where the air conditioner control device is configured to execute the air conditioner air-supplementing enthalpy-increasing control method, and the control device includes: the calculation module is used for controlling the temperature T according to the inlet temperature when the air conditioner is operated in low-temperature heating mode Feeding in And outlet temperature T Out of Calculating superheat degree T of plate heat exchanger co The method comprises the steps of carrying out a first treatment on the surface of the A judging module for judging the degree of superheat T co Judging whether the air conditioner meets the electromagnetic valve adjusting condition or not; and the control module is used for controlling and adjusting the opening of the first air supplementing expansion valve and/or controlling and adjusting the opening of the second air supplementing expansion valve when the air conditioner meets the electromagnetic valve adjusting condition.
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: when the air conditioner control device executes the control method of air conditioner air supplementing and enthalpy increasing, the control device has all technical characteristics and all beneficial effects of the control method, and the description is omitted herein.
Further, the invention also provides an air conditioner, which is provided with an air conditioner air supplementing and enthalpy increasing device; or the air conditioner comprises a computer readable storage medium storing a computer program and a processor, and when the computer program is read by the processor, the control method for air-conditioning air-supplementing enthalpy-increasing is realized.
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the air conditioner is provided with the air-conditioning air-supplementing enthalpy-increasing device or has all technical characteristics and all beneficial effects of the air-conditioning air-supplementing enthalpy-increasing device and the air-conditioning air-supplementing enthalpy-increasing control method when the air-conditioning air-supplementing enthalpy-increasing control method is realized, and the description is omitted herein.
In summary, after the technical scheme of the invention is adopted, the following technical effects can be achieved:
i) The first air supplementing expansion valve and the second air supplementing expansion valve are arranged in parallel in the air supplementing enthalpy increasing device, so that the accurate control of the air supplementing enthalpy increasing flow of the air conditioner is realized, in the process, the first air supplementing expansion valve or the second air supplementing expansion valve can be selected according to the size of the air supplementing enthalpy increasing flow of the system, or the first air supplementing expansion valve and the second air supplementing expansion valve can be regulated at the same time, and the air supplementing enthalpy increasing requirement of the air conditioning system is met; in the process, the fluctuation of the air conditioning system is reduced, the heating operation efficiency in low-temperature heating operation is improved, and the heating operation of the air conditioner is further stabilized;
ii) a first sensor and a second sensorThe arrangement of the sensor realizes the inlet temperature T of the second refrigerant inlet Feeding in Outlet temperature T of refrigerant at second refrigerant outlet Out of Further by the inlet temperature T of the plate heat exchanger Feeding in Outlet temperature T Out of After detection, the superheat degree T of the plate heat exchanger can be obtained co At the same time according to the superheat degree T co The air conditioning system can realize the air supplementing and enthalpy increasing of the compressor of the outdoor unit by controlling the flow of the refrigerant in the pipeline of the outdoor unit, thereby achieving the aim of stabilizing the heat operating efficiency of the air conditioner;
iii) Over heat T co A first preset temperature value T less than or equal to 01 At this time, the degree of superheat T in the plate heat exchanger is indicated co Smaller, the superheat degree T can be increased by controlling the first air supplementing expansion valve and/or controlling the opening degree of the second air supplementing expansion valve to be reduced co Therefore, the heating efficiency of the air conditioner is ensured; a first preset temperature value T o1 Less than the superheat degree T co A second preset temperature value T less than or equal to 02 When the refrigerant in the liquid pipeline is in a gaseous state, the reliability of the unit can be ensured, and the air supplementing quantity of the air conditioner is maximized, so that the opening degrees of the first air supplementing expansion valve and the second air supplementing expansion valve do not need to be adjusted in the interval, and the air conditioner can be operated at the current opening degree; at the superheat degree T co > second preset temperature value T 02 At this time, the degree of superheat T in the plate heat exchanger is indicated co The superheat degree T can be increased by controlling the first air supplementing expansion valve and/or controlling the opening degree of the second air supplementing expansion valve to be increased co Thereby ensuring the heating efficiency of the air conditioner.
Drawings
For a clearer description of the technical solutions of the present invention, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the description below are only some of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art;
fig. 1 is a schematic structural view of an air conditioner provided by the present invention;
FIG. 2 is a schematic diagram of the vapor-enriched enthalpy-increasing device of FIG. 1;
fig. 3 is a schematic structural diagram of a control method for air-conditioning air-supplementing and enthalpy-increasing according to the present invention.
Description of the reference numerals
100-air conditioning; 10-a compressor; 20-a gas-liquid separator; 30-a four-way valve; 40-an outdoor heat exchanger; 50-a first expansion valve; 60-an air supplementing and enthalpy increasing device; 61-plate heat exchanger; 611-a first sensor; 612-a second sensor; 613-a first refrigerant inlet; 614-a first refrigerant outlet; 615-a second refrigerant inlet; 616—a second refrigerant outlet; 62-a first air supply pipeline; 621-a second expansion valve; 622-a first make-up expansion valve; 623-a second make-up expansion valve; 63-a second air supply line; 71-gas piping; 711-a first control valve; 72-liquid piping; 721-a second control valve; 722-a first liquid conduit; 723-a second liquid conduit; 80-an outdoor unit; 90-indoor unit.
Detailed Description
In order to make the objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
Preferably, referring to fig. 1 and 2, the present invention provides an air conditioner 100, wherein the air conditioner 100 includes an outdoor unit 80, an indoor unit 90, and an air-supplementing enthalpy-increasing device 60; wherein, a gas pipeline 71 and a liquid pipeline 72 are arranged between the outdoor unit 80 and the indoor unit 90, the outdoor unit 80 is provided with an outdoor heat exchanger 40 and a compressor 10, and the air supplementing enthalpy increasing device 60 is arranged on the liquid pipeline 72 and is positioned between the indoor unit 90 and the outdoor heat exchanger 40; the air-supplementing and enthalpy-increasing device 60 is used for supplementing air and increasing enthalpy to the compressor 10, and in the process, the heating efficiency of the air conditioner in low-temperature heating operation can be ensured, the system fluctuation is reduced, and the comfort is improved.
Further, the outdoor unit 80 is further provided with a gas-liquid separator 20, a four-way valve 30, and a first expansion valve 50; the four-way valve 30 is connected between the compressor 10 and the gas pipe 71, and the gas-liquid separator 20 is connected between the four-way valve 30 and the compressor 10; meanwhile, a first control valve 711 for adjusting the flow rate of the refrigerant in the gas pipeline 71 is arranged on the gas pipeline 71; a second control valve 721 for adjusting the flow rate of the refrigerant in the liquid pipe 72 is arranged on the liquid pipe 72, and the second control valve 721 is arranged between the air-supplementing enthalpy-increasing device 60 and the indoor unit 90; the first expansion valve 50 is disposed in the liquid pipe 72 and is located between the air-supplementing and enthalpy-increasing device 60 and the outdoor heat exchanger 40.
Preferably, the air-supplementing enthalpy-increasing device 60 includes: a plate heat exchanger 61, a first air supplementing duct 62 and a second air supplementing duct 63; the plate heat exchanger 61 is provided in the liquid pipe 72, and a second refrigerant inlet 615 and a second refrigerant outlet 616 are provided in the plate heat exchanger 61; the first gas supplementing pipe 62 has a first end connected to the second refrigerant inlet 615, a second end connected to the liquid pipe 72, and a second end located between the outdoor heat exchanger 40 and the plate heat exchanger 61; the second gas-supplementing pipe 63 has one end connected to the second refrigerant outlet 616 and the other end connected to a gas-supplementing port (not shown) of the compressor 10.
Further, the plate heat exchanger 61 is further provided with a first refrigerant inlet 613 and a first refrigerant outlet 614, the liquid pipe 72 includes a first liquid pipe 722 and a second liquid pipe 723, wherein one end of the first liquid pipe 722 is connected to the indoor unit 90, the other end is connected to the first refrigerant inlet 613, one end of the second liquid pipe 723 is connected to the first refrigerant outlet 614, the other end is connected to the outdoor heat exchanger 40, and the first air supplementing pipe 62 is connected to the second liquid pipe 723.
Further, the first air supplementing pipe 62 is provided with a second expansion valve 621, a first air supplementing expansion valve 622 and a second air supplementing expansion valve 623, and the first air supplementing expansion valve 622 and the second air supplementing expansion valve 623 are arranged in parallel; the air-make-up enthalpy increasing device 60 can perform air-make-up enthalpy increasing for the compressor 1 θ by the second expansion valve 621 and the first air-make-up expansion valve 622, and/or by the second expansion valve 621 and the second air-make-up expansion valve 623.
It should be noted that, during the low-temperature heating operation of the air conditioner, the flow direction of the refrigerant in the air conditioner 100 is: a part of refrigerant flows from the indoor unit 90 to the liquid pipeline 72, further flows into the plate heat exchanger 61 after passing through the second control valve 721 and the first refrigerant inlet 613 in sequence, flows out of the first refrigerant outlet 614 of the plate heat exchanger 61, flows into the four-way valve 30 after passing through the first expansion valve 50 and the outdoor heat exchanger 40 in sequence, and finally flows into the compressor 10 after passing through the gas-liquid separator 20 from the four-way valve 30; the other path is as follows: the refrigerant in the indoor unit 90 flows into the plate heat exchanger 61 through the second control valve 721 and the first refrigerant inlet 613 in sequence in the liquid pipeline 72, further flows out from the first refrigerant outlet 614 of the plate heat exchanger 61, flows into the plate heat exchanger 61 again through the second refrigerant inlet 615 through the first air supplementing pipeline 62, the second expansion valve 621, the first air supplementing expansion valve 622 or the second air supplementing expansion valve 623, and flows into the compressor 10 through the second air supplementing pipeline 63 from the second refrigerant outlet 616; finally, after the two-way refrigerant is compressed in the compressor 10, the refrigerant flows into the four-way valve 30 again, and finally flows into the indoor unit 90 again through the gas pipe 71 and the first control valve 711 to complete the cycle.
Preferably, the air-supplementing enthalpy-increasing device 60 further includes: a first sensor 611 and a second sensor 612, the first sensor 611 is disposed at a position of the plate heat exchanger 61 near the second refrigerant inlet 615 for detecting an inlet temperature T of the refrigerant at the second refrigerant inlet 615 Feeding in The method comprises the steps of carrying out a first treatment on the surface of the The second sensor 612 is disposed at a position of the plate heat exchanger 61 near the second refrigerant outlet 616, and is configured to detect an outlet temperature T of the refrigerant at the second refrigerant outlet 616 Out of 。
Preferably, referring to fig. 3, the present invention further provides a control method for air-conditioning air-supplementing enthalpy-increasing, where the control method is applied to the air-conditioning air-supplementing enthalpy-increasing device, and specifically, the control method includes:
s10: when the air conditioner is in low-temperature heating operation, the air conditioner is operated according to the inlet temperature T Feeding in And outlet temperature T Out of Calculating superheat degree T of plate heat exchanger co ；
S20: according to the degree of superheat T co Judging whether the air conditioner meets the electromagnetic valve adjusting condition or not;
s30: if yes, controlling and adjusting the opening of the first air supplementing expansion valve and/or controlling and adjusting the opening of the second air supplementing expansion valve.
In the present invention, the inlet temperature T at the second refrigerant inlet 615 of the plate heat exchanger 61 is used for Feeding in Outlet temperature T of refrigerant at second refrigerant outlet 616 Out of After the detection, the superheat degree T of the plate heat exchanger 61 can be obtained co Further, according to the degree of superheat T co The air-supplementing and enthalpy-increasing of the compressor 10 of the outdoor unit 80 can be realized by controlling the flow of the refrigerant in the pipeline of the outdoor unit 80, thereby achieving the purpose of stabilizing the heating operation efficiency of the air conditioner 100.
Further, in S10, according to the inlet temperature T Feeding in And outlet temperature T Out of Calculating superheat degree T of plate heat exchanger co Comprising the following steps: degree of superheat T co Outlet temperature T Out of Inlet temperature T Feeding in . It will be appreciated that the second refrigerant outlet 616 of the plate heat exchanger 61 is directly connected to the air supply port of the compressor 10 via the second air supply pipe 63, so that the pressure and temperature of the refrigerant flowing from the plate heat exchanger 61 to the compressor 10 will affect the operation efficiency of the compressor 10, and thus the inlet temperature T will be adjusted by Feeding in Outlet temperature T Out of Detecting to obtain the superheat degree T co After that, the air-supplementing enthalpy-increasing of the air conditioner 100 can be finally realized by adjusting the magnitudes of the cooling flow in the first air-supplementing pipeline 62 and the second air-supplementing pipeline 63.
Preferably, in S30, controlling and adjusting the opening degree of the first air-supplementing expansion valve, and/or controlling and adjusting the opening degree of the second air-supplementing expansion valve includes:
s31: at the superheat degree T co The smaller the opening of the first air supplementing expansion valve is controlled, and/or the opening of the second air supplementing expansion valve is controlled to be smaller;
s32: at the superheat degree T co The larger the opening of the first air-supplementing expansion valve is, the larger the opening of the second air-supplementing expansion valve is.
In S31, the superheat T co The smaller the description of the inlet temperature T of the plate heat exchanger 61 Feeding in The smaller the difference between the air-conditioning unit and the outlet temperature Tout, the lower the superheat degree of the air-conditioning unit 100, the easier the unit returns, and the reliability of the unit is affected, and in the process, the opening degree of the first air-supplementing expansion valve and/or the second air-supplementing expansion valve can be reduced to improveDegree of superheat T of lifting plate heat exchanger 61 co In order to avoid the condition of liquid return in the air conditioner; in contrast, in S32, the degree of superheat T co The larger the inlet temperature T of the plate heat exchanger 61 is illustrated Feeding in And outlet temperature T Out of The larger the difference value is, the higher the superheat degree of the air-supplementing in the air conditioner 100 is, the insufficient air-supplementing amount is indicated, and the air-supplementing effect is affected, in this process, the superheat degree T of the plate heat exchanger 61 can be reduced by increasing the opening degree of the first air-supplementing expansion valve and/or the second air-supplementing expansion valve co In order to avoid the condition of insufficient air supply in the air conditioner.
Preferably, in S20, determining whether the air conditioner satisfies the solenoid valve adjustment condition includes:
s21: at the superheat degree T co A first preset temperature value T less than or equal to 01 When the first air supplementing expansion valve is controlled, and/or the opening degree of the second air supplementing expansion valve is controlled to be reduced;
s22: at a first preset temperature value T 01 Less than the superheat degree T co A second preset temperature value T less than or equal to 02 When the air supply device is in operation, the first air supply expansion valve is controlled, and/or the second air supply expansion valve is controlled to keep running at the current opening;
s23: at the superheat degree T co > second preset temperature value T 02 And controlling the opening degree of the first air supplementing expansion valve and/or controlling the opening degree of the second air supplementing expansion valve to be increased.
It should be noted that in S21-S23, the first preset temperature value T 01 The method meets the following conditions: t (T) 01 ∈(0℃，2℃]Wherein T is 01 Selecting 0.5deg.C, 1 deg.C, 1.5deg.C and 2deg.C; a second preset temperature value T 02 The method meets the following conditions: t (T) 02 ∈(2℃，5℃]Wherein T is 02 2.5deg.C, 3deg.C, 3.5deg.C, 4deg.C, 4.5deg.C and 5deg.C can be selected; when the inlet temperature T of the plate heat exchanger 61 Feeding in And outlet temperature T Out of The difference between them is (0 ℃,2℃)]At this time, the degree of superheat T in the plate heat exchanger 61 is indicated co Smaller, the superheat degree T can be increased by controlling the first air supplementing expansion valve and/or controlling the opening degree of the second air supplementing expansion valve to be reduced co Thereby ensuring the heating efficiency of the air conditioner 100The method comprises the steps of carrying out a first treatment on the surface of the Further when the inlet temperature T of the plate heat exchanger 61 Feeding in And outlet temperature T Out of The difference between them is (2 ℃,5℃)]When the refrigerant is in a gaseous state, the reliability of the unit can be ensured, and the air supplementing amount of the air conditioner 100 is maximized, so that the opening degrees of the first air supplementing expansion valve and the second air supplementing expansion valve do not need to be adjusted in the interval, and the air conditioner can operate at the current opening degree; when the inlet temperature T of the plate heat exchanger 61 Feeding in And outlet temperature T Out of When the difference between them is greater than 5 c, this indicates the degree of superheat T in the plate heat exchanger 61 co Larger, the superheat degree T can be increased by controlling the first air-supplementing expansion valve 622 and/or controlling the opening degree of the second air-supplementing expansion valve 623 to be increased co Thereby ensuring the heating efficiency of the air conditioner 100; wherein, the first preset temperature value T 01 A second preset temperature value T 02 The size of the air conditioner (100) can be determined according to the actual operation efficiency of the air conditioner and the actual requirement of the user, and is not limited to the first preset temperature value T in the invention 01 A second preset temperature value T 02 Size limitation.
Preferably, in order to ensure accurate control of refrigerant flow, effective control of opening degrees of the first air-supplementing expansion valve and the second air-supplementing expansion valve is realized, and the maximum flow Q of the first air-supplementing expansion valve max1 Maximum flow Q with the second air supplementing expansion valve max2 Different; specifically, the maximum flow rate Q of the first air supplementing expansion valve max1 Maximum flow Q with the second air supplementing expansion valve max2 The following are satisfied: q (Q) max1 ＝γ×Q max2 Wherein, gamma is a constant and gamma is 2,3]Wherein, γ may be selected from 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, and 3, and of course, the size of γ may be determined according to the actual operating efficiency of the air conditioner 100 and the actual requirement of the user, which is not limited to the limitation of the size of γ in the present invention.
Preferably, the opening of the first and second make-up expansion valves 622, 623 is in the range of [0pls,480pls ]]The opening ranges of the first and second air-supplementing expansion valves 622 and 623 are the same, and the corresponding flow rates are different; wherein the first tonifying qi expandsThe flow rates of the expansion valve 622 and the second make-up expansion valve 623 are respectively Q 1 And Q is equal to 2 The openings of the first and second make-up expansion valves 622 and 623 are P 1 And P 2 ，：
(1)Q 1 -P 1m1 ＝α×Q max2 ；
(2)Q 1 -P 1m2 ＝β×Q max2 。
It is noted that Q 1 -P 1m1 For the first make-up expansion valve 622 and the opening degree is P 1m1 Flow rate at time, alpha E [1.4,1.6 ]]The method comprises the steps of carrying out a first treatment on the surface of the Wherein, alpha can be selected from 1.4, 1.5 and 1.6; q (Q) 1 150 is the flow rate when the opening of the first air-make-up expansion valve 622 is 300 pls; beta is Q 1 -150 flow rate is higher than maximum flow rate Q of second air supplementing expansion valve 623 max2 Is a multiple of beta.E [0.9,1.1 ]]Wherein, beta can be selected from 0.9,1 and 1.1.
Further, when the opening degrees of the first air-supplementing expansion valve 622 and the second air-supplementing expansion valve 623 are adjusted, each time the opening degrees are adjusted according to Δp, the difference in the flow rates of the first air-supplementing expansion valve 622 and the second air-supplementing expansion valve 623 is considered, so that the air conditioner 100 is prevented from generating large fluctuation, and the value of Δp is not easy to be excessively large, in the present invention, Δp e (1 pls,10 pls), wherein Δp may be selected from 2pls, 3pls, 4pls, 5pls, 6pls, 7pls, 8pls, 9pls, 10pls, specifically, may be determined according to the flow rates of the first air-supplementing expansion valve 622 and the second air-supplementing expansion valve 623 and the actual demands of users, which are not limited only herein.
Preferably, in the invention, sectional control can be adopted according to the magnitude of the air-supplementing enthalpy-increasing flow, and the magnitude of the first air-supplementing expansion valve and the magnitude of the second air-supplementing expansion valve are regulated, namely when the air-supplementing enthalpy-increasing flow requirement is large, the first air-supplementing expansion valve and the second air-supplementing expansion valve are regulated; when the air supplementing and enthalpy increasing flow is small, only one electronic expansion valve is controlled.
Table 1: relationship between the vapor-enriched enthalpy flow and the opening degree adjustment of the first vapor-enriched expansion valve and the second vapor-enriched expansion valve
Preferably, when the opening degrees of the first air-supplementing expansion valve 622 and the second air-supplementing expansion valve 623 are the same, the flow rate of the first air-supplementing expansion valve 622 is larger than the flow rate of the second air-supplementing expansion valve 623, so that when the air-supplementing enthalpy flow rate requirements are different, the first air-supplementing expansion valve 622 and the second air-supplementing expansion valve 623 can be adjusted, specifically, in table 1, when the air-supplementing enthalpy flow rate requirement of the air conditioner 100 is in an extra large state, the opening degree of the second air-supplementing expansion valve 623 is adjusted to be the maximum, namely, the opening degree of the second air-supplementing expansion valve 623 is adjusted to be 480pls, and meanwhile, the opening degree of the first air-supplementing expansion valve 622 is adjusted to be more than 300pls, so as to meet the requirement of the air conditioner 100; when the air-conditioning 100 has an air-supplementing enthalpy-increasing flow demand of (super large→large) →large→medium, the opening of the first air-supplementing expansion valve 622 is adjusted to 300pls, and simultaneously the opening of the second air-supplementing expansion valve 623 is adjusted according to the air-conditioning 100 air-supplementing enthalpy-increasing flow demand until the opening is adjusted from 480pls to 0; similarly, in the process of (large→medium→small) the air conditioner 100 with the air-supplementing enthalpy-increasing flow demand, the opening sizes of the first air-supplementing expansion valve 622 and the second air-supplementing expansion valve 623 can be accurately adjusted according to the air-supplementing enthalpy-increasing flow demand, the opening size of the first air-supplementing expansion valve 622 can be adjusted from 300pls to 0pls, meanwhile, the opening size of the second air-supplementing expansion valve 623 can be adjusted from 0pls to 480pls, and the specific adjustment size can be referred to table 1, which is not repeated here.
The invention also provides an air conditioner control device, which is used for executing the air conditioner air supplementing and enthalpy increasing control method, and comprises the following steps: the calculation module is used for controlling the temperature T according to the inlet temperature when the air conditioner is operated in low-temperature heating mode Feeding in And outlet temperature T Out of Calculating the superheat Tc of the plate heat exchanger 61 o The method comprises the steps of carrying out a first treatment on the surface of the And the judging module is used for judging the degree T of superheat. o Judging whether the air conditioner meets the electromagnetic valve adjusting condition or not; and a control module for controlling and adjusting the opening of the first air-supplementing expansion valve 622 and/or controlling and adjusting the opening of the second air-supplementing expansion valve 623 when the air conditioner meets the electromagnetic valve adjusting condition.
Preferably, the air conditioner control device has all technical features and all beneficial effects of the control method when executing the control method for air conditioning air supply and enthalpy increase, and will not be described in detail herein.
The invention also provides an air conditioner, which is provided with an air conditioner air supplementing and enthalpy increasing device; or the air conditioner comprises a computer readable storage medium storing a computer program and a processor, and when the computer program is read by the processor, the control method for air-conditioning air-supplementing enthalpy-increasing is realized.
Preferably, the air conditioner is provided with the air conditioner air supplementing and enthalpy increasing device, or has all technical characteristics and all beneficial effects of the air conditioner air supplementing and enthalpy increasing device and the air conditioner air supplementing and enthalpy increasing control method when the air conditioner air supplementing and enthalpy increasing control method is realized, and the description is omitted herein.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (12)
1. An air conditioner air-supplementing and enthalpy-increasing device, wherein the air conditioner (100) comprises an outdoor unit (80), an indoor unit (90) and an air-supplementing and enthalpy-increasing device (60); wherein, be provided with gas pipeline (71) and liquid pipeline (72) between off-premises station (80) with indoor set (90), off-premises station (80) are provided with outdoor heat exchanger (40) and compressor (10), its characterized in that, air make-up enthalpy device (60) set up in liquid pipeline (72), and be located between indoor set (90) and outdoor heat exchanger (40), air make-up enthalpy device (60) still include:
a plate heat exchanger (61), wherein the plate heat exchanger (61) is arranged on the liquid pipeline (72), and a second refrigerant inlet (615) and a second refrigerant outlet (616) are arranged on the plate heat exchanger (61);
-a first air supplementing duct (62), a first end of the first air supplementing duct (62) being connected to the second refrigerant inlet (615), a second end being connected to the liquid duct (72), and the second end being located between the outdoor heat exchanger (40) and the plate heat exchanger (61);
a second air supplementing pipe (63), wherein one end of the second air supplementing pipe (63) is connected to the second refrigerant outlet (616), and the other end is connected to an air supplementing port of the compressor (10);
wherein the first air supplementing pipeline (62) is provided with a second expansion valve (621), a first air supplementing expansion valve (622) and a second air supplementing expansion valve (623), and the first air supplementing expansion valve (622) and the second air supplementing expansion valve (623) are arranged in parallel; the air-supplementing and enthalpy-increasing device (60) can realize air-supplementing and enthalpy-increasing of the air conditioner (100) through the second expansion valve (621) and the first air-supplementing expansion valve (622) and/or through the second expansion valve (621) and the second air-supplementing expansion valve (623).
2. Air conditioning, air make-up and enthalpy adding device according to claim 1, characterized in that the plate heat exchanger (61) is further provided with a first refrigerant inlet (613) and a first refrigerant outlet (614), the liquid conduit (72) comprises a first liquid conduit (722) and a second liquid conduit (723), wherein one end of the first liquid conduit (722) is connected to the indoor unit (90) and the other end is connected to the first refrigerant inlet (613), one end of the second liquid conduit (723) is connected to the first refrigerant outlet (614), the other end is connected to the outdoor heat exchanger (40), and the first air make-up conduit (62) is connected to the second liquid conduit (723).
3. Air conditioning air make-up enthalpy increasing device according to claim 2, characterized in that the air make-up enthalpy increasing device (60) further comprises:
a first sensor (611), wherein the first sensor (611) is arranged at a position of the plate heat exchanger (61) close to the second refrigerant inlet (615) and is used for detecting the inlet temperature T of the refrigerant at the second refrigerant inlet (615) Feeding in ；
A second sensor (612), wherein the second sensor (612) is arranged at a position of the plate heat exchanger (61) close to the second refrigerant outlet (616) for detecting the second refrigerant outletOutlet temperature T of refrigerant at port (616) Out of 。
4. A control method for air conditioning air supply enthalpy increase, wherein the control method is applied to the air conditioning air supply enthalpy increase device according to claim 3, the control method includes:
when the air conditioner is in low-temperature heating operation, the temperature T is used for controlling the temperature T Feeding in And the outlet temperature T Out of Calculating the superheat T of the plate heat exchanger (61) co ；
According to the superheat degree T co Judging whether the air conditioner meets the electromagnetic valve adjusting condition or not;
if yes, controlling and adjusting the opening degree of the first air supplementing expansion valve (622) and/or controlling and adjusting the opening degree of the second air supplementing expansion valve (623).
5. The method for controlling air conditioning and air supply enthalpy gain according to claim 4, characterized in that the inlet temperature T is set Feeding in And the outlet temperature T Out of Calculating the superheat T of the plate heat exchanger (61) co Comprising the following steps:
the superheat degree T co The outlet temperature T Out of Inlet temperature T Feeding in 。
6. The control method of air conditioning air make-up enthalpy addition according to claim 4, characterized in that the controlling adjusts the opening degree of the first air make-up expansion valve (622) and/or the controlling adjusts the opening degree of the second air make-up expansion valve (623) includes:
at the superheat degree T co The smaller the opening of the first air-supplementing expansion valve (622) and/or the second air-supplementing expansion valve (623) is controlled to be smaller;
and/or, at the superheat degree T co The larger the opening of the first air-supplementing expansion valve (622) is controlled and/or the second air-supplementing expansion valve (623) is controlled to be larger.
7. The method for controlling air conditioning and enthalpy increasing according to claim 5, wherein the determining whether the air conditioner satisfies a solenoid valve adjustment condition includes:
at the superheat degree T co A first preset temperature value T less than or equal to 01 -controlling the first make-up expansion valve (622), and/or controlling the opening of the second make-up expansion valve (623) to decrease;
and/or, at a first preset temperature value T 01 < said degree of superheat T co A second preset temperature value T less than or equal to 02 -controlling the first make-up expansion valve (622) and/or controlling the second make-up expansion valve (623) to remain operating at the current opening;
and/or, at the superheat degree T co >A second preset temperature value T 02 And controlling the opening degree of the first air supplementing expansion valve (622) and/or the second air supplementing expansion valve (623) to be increased.
8. The method for controlling the air-conditioning air-make-up enthalpy addition according to any one of claims 4 to 7, characterized by a maximum flow Q of the first air-make-up expansion valve (622) max1 Maximum flow Q with the second air supplementing expansion valve (623) max2 Different.
9. The method for controlling the air-conditioning air-make-up enthalpy addition according to claim 8, characterized in that the maximum flow Q of the first air-make-up expansion valve (622) max1 Maximum flow Q with the second air supplementing expansion valve (623) max2 The following are satisfied: q (Q) max1 ＝γ×Q max2 Wherein, gamma is a constant and gamma is 2,3]。
10. The control method of air conditioning and air make-up enthalpy according to any one of claims 4 to 7, characterized in that the opening of the first air make-up expansion valve (622) and the second air make-up expansion valve (623) ranges between [0pls,480pls ].
11. An air conditioner control device for executing the control method of air conditioner air supply enthalpy increase according to any one of claims 4 to 10, the control device comprising:
a calculation module for calculating the inlet temperature T during the low-temperature heating operation of the air conditioner Feeding in And the outlet temperature T Out of Calculating the superheat T of the plate heat exchanger (61) co ；
A judging module for judging the degree of superheat T co Judging whether the air conditioner meets the electromagnetic valve adjusting condition or not;
and the control module is used for controlling and adjusting the opening degree of the first air supplementing expansion valve (622) and/or controlling and adjusting the opening degree of the second air supplementing expansion valve (623) when the air conditioner meets the electromagnetic valve adjusting condition.
12. An air conditioner, characterized in that the air conditioner is provided with the air conditioning air supplementing enthalpy increasing device according to any one of claims 1 to 3; or the air conditioner comprises a computer readable storage medium storing a computer program and a processor, wherein the computer program realizes the control method for air conditioning air supply enthalpy increase according to any one of claims 4-10 when read by the processor.
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|---|---|---|---|
| CN202311282908.1A CN117212966A (en) | 2023-09-28 | 2023-09-28 | Air conditioner air supplementing and enthalpy increasing device, control method and device and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311282908.1A CN117212966A (en) | 2023-09-28 | 2023-09-28 | Air conditioner air supplementing and enthalpy increasing device, control method and device and air conditioner |
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| CN (1) | CN117212966A (en) |
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