CN114992803A - Control method and device for air supply and enthalpy increase of heat pump air conditioner and heat pump air conditioner - Google Patents
Control method and device for air supply and enthalpy increase of heat pump air conditioner and heat pump air conditioner Download PDFInfo
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- CN114992803A CN114992803A CN202210602721.4A CN202210602721A CN114992803A CN 114992803 A CN114992803 A CN 114992803A CN 202210602721 A CN202210602721 A CN 202210602721A CN 114992803 A CN114992803 A CN 114992803A
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 230000008859 change Effects 0.000 claims abstract description 48
- 238000010438 heat treatment Methods 0.000 claims abstract description 45
- 239000013589 supplement Substances 0.000 claims abstract description 29
- 239000003507 refrigerant Substances 0.000 claims description 22
- 238000010257 thawing Methods 0.000 claims description 10
- 238000005485 electric heating Methods 0.000 claims description 9
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- 238000004891 communication Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000004378 air conditioning Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
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- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The application relates to the technical field of intelligent household appliances, and discloses a control method for air supplement and enthalpy increase of a heat pump air conditioner, wherein the heat pump air conditioner comprises a heating circulation loop and an air supplement and enthalpy increase loop, and a main electronic expansion valve is arranged on the heating circulation loop; the air-replenishing enthalpy-increasing loop is connected in parallel between the indoor side heat exchanger of the heating circulation loop and the compressor and is used for replenishing air for the compressor; the vapor-supplying enthalpy increasing loop is provided with a vapor-supplying electronic expansion valve; the control method comprises the following steps: under the condition that the heat pump air conditioner is determined to execute the air-supplementing and enthalpy-increasing control instruction, controlling an air-supplementing and enthalpy-increasing loop to be in a conducting state, and controlling an air-supplementing electronic expansion valve to be opened to a preset opening degree; acquiring the exhaust temperature change rate of the compressor; and adjusting the opening degrees of the air supply electronic expansion valve and the main electronic expansion valve according to the change rate of the exhaust air temperature. The method enables the system to run towards a steady state, and improves the heating capacity of the system in a low-temperature environment. The application also discloses a control device and a heat pump air conditioner for increasing enthalpy by air make-up of the heat pump air conditioner.
Description
Technical Field
The application relates to the technical field of intelligent household appliances, for example to a control method and device for air supplement and enthalpy increase of a heat pump air conditioner and the heat pump air conditioner.
Background
The air source heat pump air conditioner is an air conditioner which takes air as a low-temperature heat source, drives a compressor to run by a small amount of electric energy, and raises low-level heat energy in the air into high-level heat energy to supply heat for users. The heat pump air conditioner has the characteristics of high efficiency, environmental protection and the like, but under low-temperature and ultralow-temperature environments, the heat pump air conditioner has the conditions of overlarge compression ratio of a compressor, overlow evaporation temperature and overhigh exhaust temperature. This results in a reduction in the heating capacity of the unit, which in turn affects the heating effect.
In the related art, an air-supplying enthalpy-increasing system and a control method thereof are disclosed, wherein the air-supplying enthalpy-increasing system comprises an air-supplying enthalpy-increasing compressor, a four-way valve, a water side heat exchanger, an air side heat exchanger, an economizer, an electromagnetic valve, a first electronic expansion valve and a second electronic expansion valve; the first outlet of the economizer is connected with one end, far away from the four-way valve, of the air side heat exchanger through a first electronic expansion valve, and the second outlet of the economizer is connected with the first outlet of the economizer and a pipeline between the first electronic expansion valve through a second electronic expansion valve. The control method includes adjusting the states of the electronic expansion valve and the solenoid valve based on the temperatures of the compressor discharge port, the air make-up port, and the economizer second outlet.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
in the related technology, the air-supplying enthalpy-increasing control mainly controls the opening degree of the second electronic expansion valve and adjusts the flow of the refrigerant entering the economizer. But the effect of air supply and enthalpy increase is poor, and the system is difficult to stably operate.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a heat pump air conditioner and a control method and device for air supply and enthalpy increase of the heat pump air conditioner, so as to improve the effect of air supply and enthalpy increase and realize stable operation of an air conditioning system.
In some embodiments, the heat pump air conditioner comprises a heating circulation loop and an air-supplying enthalpy-increasing loop, wherein a main electronic expansion valve is arranged on the heating circulation loop; the air-replenishing enthalpy-increasing loop is connected in parallel between the indoor side heat exchanger of the heating circulation loop and the compressor and is used for replenishing air for the compressor; the vapor-supplementing enthalpy-increasing loop is provided with a vapor-supplementing electronic expansion valve; the control method comprises the following steps: under the condition that the heat pump air conditioner is determined to execute the air-supplementing and enthalpy-increasing control instruction, controlling the air-supplementing and enthalpy-increasing loop to be in a conducting state, and controlling the air-supplementing electronic expansion valve to be opened to a preset opening degree; acquiring the exhaust temperature change rate of the compressor; and adjusting the opening degrees of the air supply electronic expansion valve and the heating electronic expansion valve according to the change rate of the exhaust air temperature.
In some embodiments, the apparatus comprises: the system comprises a processor and a memory, wherein the memory stores program instructions, and the processor is configured to execute the control method for enthalpy increase of air make-up of the heat pump air conditioner.
In some embodiments, the heat pump air conditioner includes: a heating circulation loop comprising a main electronic expansion valve; the vapor-supplying enthalpy-increasing loop comprises a vapor-supplying electronic expansion valve; the air-supplying enthalpy-increasing loop is connected between the indoor side heat exchanger and the compressor in parallel; used for supplying air and increasing enthalpy for the compressor; and the control device for increasing enthalpy of air make-up of the heat pump air conditioner is used as the control device.
The control method and device for air supplement and enthalpy increase of the heat pump air conditioner and the heat pump air conditioner provided by the embodiment of the disclosure can realize the following technical effects:
in the embodiment of the disclosure, under the condition that it is determined that the heat pump air conditioner needs to perform air make-up and enthalpy increase, the conduction of the air make-up and enthalpy increase loop is controlled, and the air make-up electronic expansion valve is controlled to be opened to a preset opening degree. And then the opening degrees of the air supply electronic expansion valve and the main electronic expansion valve are adjusted according to the change rate of the exhaust air temperature. The adjustment of the exhaust temperature is realized by adjusting the flow of the refrigerant at the air supplement port of the compressor. Therefore, the system operation tends to steady state operation, and the heating capacity of the system in a low-temperature environment is improved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated in the accompanying drawings, which correspond to the accompanying drawings and not in a limiting sense, in which elements having the same reference numeral designations represent like elements, and in which:
fig. 1 is a schematic structural diagram of a heat pump air conditioner provided in an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a defrosting pipe of a heat pump air conditioner provided by an embodiment of the disclosure;
FIG. 3 is a schematic diagram of a method for controlling enthalpy increase of air supplied to a heat pump air conditioner according to an embodiment of the disclosure;
FIG. 4 is a schematic diagram illustrating a method for adjusting the opening degrees of the electronic expansion valve for replenishing gas and the main electronic expansion valve according to an embodiment of the disclosure;
FIG. 5 is a schematic diagram of another control method for increasing enthalpy of air make-up of a heat pump air conditioner according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram illustrating another enthalpy increase control method for a heat pump air conditioner according to an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of another control method for increasing enthalpy of air make-up of a heat pump air conditioner according to an embodiment of the present disclosure;
FIG. 8 is a schematic diagram of an application of an embodiment of the present disclosure;
fig. 9 is a schematic diagram of a device for controlling enthalpy increase of air make-up of a heat pump air conditioner according to an embodiment of the present disclosure.
Description of the drawings:
10. a compressor; 20. a four-way valve; 30. an indoor-side heat exchanger; 40. an economizer; 50. an outdoor side heat exchanger; 60. a main electronic expansion valve; 70. an air supply electronic expansion valve; 80. an electromagnetic valve; 90. a filter; 11. an electrical heating belt; 51. a defrosting pipe; 52. a chassis.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. E.g., a and/or B, represents: a or B, or A and B.
The term "correspond" may refer to an association or binding relationship, and a corresponds to B refers to an association or binding relationship between a and B.
Referring to fig. 1, the heat pump air conditioner includes a heating cycle circuit and an enthalpy-increasing vapor-making circuit. The heating cycle circuit includes a compressor 10, a four-way valve 20, an indoor side heat exchanger 30, an economizer 40, a filter 90, a main electronic expansion valve 60, and an outdoor side heat exchanger 50. Specifically, the four-way valve 20 is connected to the discharge port of the compressor 10, and the four-way valve 20 is connected to the inlet of the indoor-side heat exchanger 30. The outlet of the indoor side heat exchanger 30 is connected to the first inlet a of the economizer 40, the first outlet B of the economizer 40 is communicated with the first inlet a, and the first outlet B is connected to the inlet of the outdoor side heat exchanger 50 through the main electronic expansion valve 60. The outlet of the outdoor heat exchanger 50 is connected to the return port of the compressor 10 via the four-way valve 20.
The vapor-supplementing enthalpy-increasing loop is connected in parallel between the indoor side heat exchanger 30 and the compressor 10 of the heating circulation loop. The vapor-supplementing enthalpy-increasing loop comprises a solenoid valve 80, a vapor-supplementing electronic expansion valve 70 and an economizer 40. Specifically, the outlet of the indoor-side heat exchanger 30 is divided into two paths, one of which is connected to the first inlet a of the economizer 40. The other path is connected with the electromagnetic valve 80, passes through the air supply electronic expansion valve 70, is connected with a second inlet C of the economizer 40, passes through a second outlet D communicated with the second inlet C, and is connected with an air supply port of the compressor 10.
Here, the solenoid valve 80 is set to a de-energized closed state, i.e., an initial state after energization is an open state. And the initial state of the make-up air electronic expansion 70 valve is a closed state. The heat pump air conditioner generally needs to supplement air and increase enthalpy when heating in winter. The solenoid valve 80 and the vapor-supplementing electronic expansion valve 70 in the vapor-supplementing enthalpy-increasing loop need to be opened. Further, in the vapor supplement and enthalpy increase control process, the refrigerant amount at the vapor supplement port of the compressor 10 is adjusted by controlling the opening degrees of the vapor supplement electronic expansion valve 70 and the main electronic expansion valve 60. It is understood that when the heat pump air conditioner does not require the air make-up enthalpy increase, the solenoid valve 80 and the air make-up electronic expansion valve 70 need to be closed.
In addition, when the heat pump air conditioner performs heating operation and performs air-supply enthalpy-increasing control, the refrigerant flowing through the first inlet a and the first outlet B of the economizer 40 in the heating cycle circuit is medium-high temperature liquid refrigerant after heat exchange by the indoor-side heat exchanger 30. In the vapor-supplementing enthalpy-increasing loop, the refrigerants flowing through the second inlet C and the second outlet D of the economizer 40 are low-temperature gas-liquid refrigerants which are throttled, cooled and depressurized by the vapor-supplementing electronic expansion valve 70. The refrigerant in the two circuits exchanges heat in the economizer 40, so that the refrigerant in the vapor-supplementing enthalpy-increasing circuit absorbs heat and turns into gas, and the gas is sucked by the vapor supplementing port of the compressor.
Optionally, the vapor-supplementing enthalpy-increasing circuit further includes a defrosting pipe 51 disposed on a base plate 52 of the outdoor heat exchanger 50 of the heating cycle circuit and near the bottom of the outdoor heat exchanger 50. One end of the defrosting pipe 51 is connected with the air supply electronic expansion valve 70, and the other end is connected with the electromagnetic valve 80.
Here, the refrigerant in the vapor-filling enthalpy-increasing circuit is a medium-high temperature refrigerant before flowing through the vapor-filling electronic expansion valve 70. Therefore, the defrosting pipe 51 is added at the time of low-temperature cooling. Thus, the medium and high temperature refrigerant in the circuit can heat the bottom of the outdoor heat exchanger 50 and the chassis 52. So that the condensed water on the surface of the outdoor heat exchanger 50 will not frost and freeze at the bottom and the chassis of the outdoor heat exchanger due to low temperature. In this way, it is not necessary to provide an electric heating device to heat the base plate 52 of the outdoor heat exchanger 50, which contributes to an increase in air-conditioning heating power and energy saving.
Optionally, the defrosting pipe 51 has a shape conforming to the coil cross-sectional shape of the outdoor side heat exchanger 50. In this way, the heat exchange between the two can be further improved. The shape of the defrosting pipe 51 can be seen in fig. 2.
Optionally, the bottom of the compressor 10 is provided with an electric heating belt 11 to heat the compressor when the temperature of the bottom of the compressor is low. Thereby avoiding the liquid impact of the compressor in the process of air supply and enthalpy increase.
With reference to fig. 3, an embodiment of the present disclosure provides a method for controlling air-make-up enthalpy increase of a heat pump air conditioner, including:
s101, the processor controls the air-supplementing enthalpy-increasing loop to be in a conducting state and controls the air-supplementing electronic expansion valve to be opened to a preset opening degree under the condition that the heat pump air conditioner is determined to execute the air-supplementing enthalpy-increasing control instruction.
S102, the processor obtains the exhaust temperature change rate of the compressor.
And S103, the processor adjusts the opening degrees of the air supply electronic expansion valve and the main electronic expansion valve according to the change rate of the exhaust air temperature.
When receiving the air-filling enthalpy-increasing control instruction, controlling the air-filling enthalpy-increasing loop to be in a conducting state. Namely, the electromagnetic valve is in an open state, and the air supply electronic expansion valve is opened. And meanwhile, the opening degree of the air supply electronic expansion valve is adjusted to a preset opening degree. Wherein the preset opening is a set value, generally not more than 50% of the maximum opening. For example, a value of 100Pluse may be taken. The initial opening of the air-supplementing electronic expansion valve is not required to be too large, so that the problem of too much air supplement amount caused by the sudden increase of refrigerant of the compressor is avoided. The return air of the compressor is subjected to liquid impact, and the reliability of the compressor is affected.
Further, a temperature sensor detects the discharge temperature Td of the compressor, and calculates the discharge temperature change rate μ of the compressor. E.g. exhaust temperature, for a period t s When the exhaust temperature change rate μ is equal to (Td (n))/t (Td (n))) s . Td (n) is the exhaust temperature detected in the nth detection period, Td (n-1) is the exhaust temperature detected in the (n-1) th detection period, t s The value may take 30 s. The exhaust gas temperature change rate can quickly and accurately reflect the exhaust condition of the compressor. And then the opening degrees of the air supply electronic expansion valve and the main electronic expansion valve are adjusted according to the change rate of the exhaust air temperature. Specifically, when the rate of change of the exhaust gas temperature indicates that the exhaust gas temperature is rising, the opening degree of the main electronic expansion valve may be adjusted smaller while the opening degree of the sub-air-supply electronic expansion valve may be adjusted larger. Thus, the pressure before and after the air-supplementing electronic expansion valve is increased, so that the refrigerant flow of the air supplementing port of the compressor is increased, and the exhaust temperature is reduced. Alternatively, the adjustment may be made smaller when the rate of change of the exhaust temperature indicates that the exhaust temperature is decreasingAnd the opening degree of the electronic expansion valve is compensated, and the opening degree of the main electronic expansion valve is increased. Thus, the pressure before and after the air-supply electronic expansion valve is reduced, and the flow of the refrigerant at the air-supply port of the compressor is reduced. Further, the air displacement of the compressor is reduced, and the air exhaust temperature is improved. Therefore, the heating capacity of the heat pump air conditioner is improved, and the steady-state operation of the system is ensured.
By adopting the method for controlling air supplement and enthalpy increase of the heat pump air conditioner, the conduction of the air supplement and enthalpy increase loop is controlled under the condition that the heat pump air conditioner needs to supplement air and increase enthalpy, and the opening of the air supplement electronic expansion valve is controlled to be a preset opening degree. And then the opening degrees of the air supply electronic expansion valve and the main electronic expansion valve are adjusted according to the change rate of the exhaust air temperature. The adjustment of the exhaust temperature is realized by adjusting the flow of the refrigerant at the air supplement port of the compressor. Therefore, the system operation tends to steady state operation, and the heating capacity of the system in a low-temperature environment is improved.
Alternatively, as shown in fig. 4, step S103, the processor adjusts the opening degrees of the air make-up electronic expansion valve and the main electronic expansion valve according to the exhaust gas temperature change rate, including:
s131, the processor adjusts the air supply electronic expansion valve according to the first amplitude value under the condition that the absolute value of the change rate of the exhaust temperature is larger than or equal to the first threshold value, determines a second amplitude value according to the current opening degree of the main electronic expansion valve, and adjusts the main electronic expansion valve.
S132, under the condition that the absolute value of the exhaust temperature change rate is smaller than a first threshold value and larger than a second threshold value, the processor adjusts the air supply electronic expansion according to a third amplitude value and adjusts the main electronic expansion valve according to a fourth amplitude value; wherein the first amplitude is greater than the third amplitude and the second amplitude is greater than the fourth amplitude.
And S133, the processor keeps the opening degrees of the air-supplementing electronic expansion valve and the main electronic expansion valve under the condition that the absolute value of the change rate of the exhaust air temperature is less than or equal to a second threshold value and the temperature difference of the refrigerant in the heating circulation loop at the inlet and the outlet of the economizer is greater than a temperature difference threshold value.
Here, a first threshold value and a second threshold value for representing the exhaust gas temperature change rate are set for the absolute value of the exhaust gas temperature change rateAnd (5) fast and slow. For example, the first threshold value takes 5% and the second threshold value takes 2%. When the absolute value of the exhaust temperature change rate is greater than or equal to a first threshold value, it indicates that the exhaust temperature changes rapidly. In this case, the opening adjustment range of the gas supply electronic expansion valve and the main electronic expansion valve needs to be adjusted in a larger range to improve the exhaust temperature. In the case where the absolute value of the exhaust gas temperature change rate is smaller than the first threshold value and larger than the second threshold value, it indicates that the exhaust gas temperature changes slowly. In this case, the opening adjustment range of the gas supply electronic expansion valve and the main electronic expansion valve is small. In the case where the absolute value of the exhaust gas temperature change rate is less than or equal to the second threshold value, it is indicated that the exhaust gas temperature tends to be stable. At this time, the temperature Tc of the refrigerant in the heating cycle circuit at the inlet and outlet of the economizer is detected 1 、Tc 2 To obtain a temperature difference Δ Tc ═ Tc 1 -Tc 2 . If the temperature difference is greater than the preset temperature difference Tc set It shows that the heating effect is better. And keeping the opening degrees of the air-supplementing electronic expansion valve and the main electronic expansion valve. Wherein, the temperature difference threshold value can be 20 ℃. The first amplitude may take on a value of 50plus and the third amplitude may take on a value of 10 plus. The second amplitude may range from 20plus to 5plus and the fourth amplitude may range from 2plus to 3 plus.
As described above, the exhaust temperature change rate has a positive value or a negative value. When the exhaust gas temperature change rate is a positive value, it indicates that the exhaust gas temperature is increasing. The opening degree of the air supply electronic expansion valve needs to be increased according to the corresponding amplitude, and the opening degree of the main electronic expansion valve needs to be decreased. Similarly, when the exhaust gas temperature change rate is a positive value, it indicates that the exhaust gas temperature is decreasing. The opening degree of the air supply electronic expansion valve needs to be decreased according to the corresponding amplitude value, and the opening degree of the main electronic expansion valve needs to be increased at the same time.
In addition, when the main electronic expansion valve needs to be adjusted by a larger amplitude, the second amplitude is determined based on the current opening degree of the main electronic expansion valve. Generally, the larger the current opening, the larger the second amplitude. After the opening degrees of the air-supplying electronic expansion valve and the main electronic expansion valve are kept, if the heating demand load of the heat pump air conditioner is changed (namely the set target temperature is reduced) or the load rate of the heat pump air conditioner is reduced (namely the output load capacity of the heat pump air conditioner is larger than the demand of a user), the air-supplying enthalpy-increasing loop is closed. Otherwise, keeping the air-supplying enthalpy-increasing loop open, and keeping the opening degrees of the air-supplying electronic expansion valve and the main electronic expansion valve.
Alternatively, in step S131, the processor determines the current opening degree of the main electronic expansion valve by:
and the processor determines a second amplitude corresponding to the current opening degree of the main electronic expansion valve according to the corresponding relation between the opening degree interval and the amplitude.
Here, the opening degree interval may be set to a plurality of intervals, and each interval corresponds to a different amplitude. And the larger the value of the opening interval is, the larger the amplitude is. As an example, the opening degree of the main electronic expansion valve is set to four sections, [ maximum opening degree, 200), [200, 150), [150, 100, [100, 0 ]. The corresponding amplitudes are 20Pluse, 15Pluse, 10Pluse and 5Pluse in sequence. Therefore, the opening degree of the main electronic expansion valve can be accurately adjusted.
Optionally, in step S103, the processor adjusts the opening degrees of the air make-up electronic expansion valve and the main electronic expansion valve according to the exhaust gas temperature change rate, and further includes:
s134, the processor acquires the exhaust temperature change rate again under the condition that the absolute value of the exhaust temperature change rate is smaller than or equal to a second threshold and the temperature difference of the refrigerant in the heating circulation loop at the inlet and the outlet of the economizer is smaller than or equal to a temperature difference threshold; and the opening degrees of the air supply electronic expansion valve and the main electronic expansion valve are adjusted according to the latest acquired exhaust gas temperature change rate.
Here, if the temperature difference of the refrigerant in the heating cycle circuit at the economizer inlet and outlet is less than or equal to the temperature difference threshold, it indicates that the heating effect does not reach a better state. Therefore, it is necessary to newly acquire the exhaust gas temperature change rate and adjust the opening degree of the main electronic expansion valve and the air supplement according to the latest exhaust gas temperature change rate. The specific adjustment strategy may be defined in steps S131 through S133 as described above.
With reference to fig. 5, another control method for increasing enthalpy of air make-up of a heat pump air conditioner is provided in an embodiment of the present disclosure, including:
s204, the processor obtains the exhaust temperature of the compressor under the condition that the heat pump air starts to run in the heating mode and the outdoor environment temperature is less than or equal to the first temperature.
S205, determining a heat pump air conditioner control execution air-supplementing enthalpy-increasing control instruction by the processor under the condition that the exhaust temperature meets a preset condition; the preset condition is that the exhaust temperature is greater than or equal to a first exhaust threshold and less than or equal to a second exhaust threshold.
S101, the processor controls the air-supplying enthalpy-increasing loop to be in a conducting state and controls the air-supplying electronic expansion valve to be opened to a preset opening degree.
S102, the processor obtains the exhaust temperature change rate of the compressor.
And S103, the processor adjusts the opening degrees of the air supply electronic expansion valve and the main electronic expansion valve according to the change rate of the exhaust air temperature.
Here, it is determined whether the heat pump air conditioner performs the air supplement enthalpy increase control by detecting the outdoor ambient temperature and the compressor discharge temperature. Specifically, when the outdoor ambient temperature is less than the first temperature, it indicates that the outdoor ambient temperature is low. In order to avoid the attenuation of the heating capacity of the air conditioning system, the air supplementing and enthalpy increasing functions of the compressor are required to be started. Further, the exhaust temperature of the compressor is obtained, and whether the exhaust temperature of the compressor meets a preset condition or not is judged. If the compressor discharge temperature does not meet the preset conditions, it indicates that the compressor discharge temperature is too low or too high. When the exhaust temperature is too high, the system is unstable in operation, and if air supplement and enthalpy increase are carried out, exhaust of the compressor is unnecessarily changed, and the air conditioning system is in failure. When the exhaust temperature is too low, the air supplement and enthalpy increase will cause the exhaust temperature of the compressor to be lower, and the fault is easy to occur. Therefore, when the exhaust temperature and the outdoor temperature both meet the conditions, the compressor is controlled to supplement air and increase enthalpy. In addition, the first temperature may take the value-3 ℃ and the first exhaust gas threshold Td 1 And may take a value of 55 deg.C, a second exhaust threshold Td 2 The value can be 110 ℃.
With reference to fig. 6, another control method for increasing enthalpy of a heat pump air conditioner is provided in the embodiments of the present disclosure, including:
s204, the processor obtains the exhaust temperature of the compressor under the condition that the heat pump air starts to run in the heating mode and the outdoor environment temperature is less than or equal to the first temperature.
S205, determining a heat pump air conditioner control execution air-supplementing enthalpy-increasing control instruction by the processor under the condition that the exhaust temperature meets a preset condition; the preset condition is that the exhaust temperature is greater than or equal to a first exhaust threshold and less than or equal to a second exhaust threshold.
S206, the processor controls the conduction of the air-supply enthalpy-increasing pipeline under the condition that the exhaust temperature does not meet the preset condition and is greater than a second exhaust threshold value; and adjusting the opening of the air supply electronic expansion valve to enable the exhaust temperature to meet the preset condition.
And S207, the processor controls the air-supply enthalpy-increasing pipeline to be closed under the condition that the exhaust temperature does not meet the preset condition and is less than the first exhaust threshold value.
And S101, after the processor executes S205, controlling the air-supplementing enthalpy-increasing loop to be in a conducting state, and controlling the air-supplementing electronic expansion valve to be opened to a preset opening degree.
S102, the processor obtains the exhaust temperature change rate of the compressor.
And S103, the processor adjusts the opening degrees of the air supply electronic expansion valve and the main electronic expansion valve according to the change rate of the exhaust air temperature.
Here, when the discharge temperature is greater than the second discharge threshold, it indicates that the current discharge temperature of the compressor is too high. At the moment, the air-supplementing enthalpy-increasing pipeline is controlled to be opened. The exhaust temperature is quickly reduced to the interval of the preset condition by adjusting the opening degrees of the air-supplementing electronic expansion valve and the main electronic expansion valve. Specifically, the opening degree of the air supply electronic expansion valve is increased, and the opening degree of the main electronic expansion valve is decreased. The opening degree increasing amplitude of the air supply electronic expansion valve can be a fifth amplitude, and the fifth amplitude is larger than the first amplitude. If the fifth amplitude may take on the value 100plus, the modulation amplitude of the main electronic expansion valve may be 5 plus.
Meanwhile, when the exhaust temperature is less than the first exhaust threshold value, the current exhaust temperature of the compressor is indicated to be too low. Therefore, the air-replenishing enthalpy-increasing pipeline is controlled to be closed, namely the electromagnetic valve is controlled to be closed, so that the fault of the compressor is avoided. And after the exhaust temperature rises and meets the preset condition, controlling the compressor to perform air supply and enthalpy increase.
With reference to fig. 7, another control method for increasing enthalpy of air make-up of a heat pump air conditioner is provided in an embodiment of the present disclosure, including:
s306, the processor acquires the operating frequency of the compressor under the condition that the heat pump air starts to operate in the heating mode and the outdoor environment temperature is less than or equal to the first temperature.
S307, under the condition that the running frequency of the compressor is greater than or equal to the preset frequency, the processor judges whether the bottom temperature of the compressor is greater than the preset bottom pressing temperature or not; if yes, executing S204; if not, S308 is performed.
S308, the processor controls the electric heating belt of the compressor to be started so as to increase the bottom temperature of the compressor to the preset bottom pressure temperature, and then S204 is executed.
S204, the processor acquires the exhaust temperature of the compressor.
S205, determining a gas-supplementing enthalpy-increasing control instruction executed by the heat pump air conditioner under the condition that the exhaust temperature meets a preset condition by the processor; the preset condition is that the exhaust temperature is greater than or equal to a first exhaust threshold and less than or equal to a second exhaust threshold.
S101, the processor controls the air-supplying enthalpy-increasing loop to be in a conducting state and controls the air-supplying electronic expansion valve to be opened to a preset opening degree.
S102, the processor obtains the exhaust temperature change rate of the compressor.
And S103, the processor adjusts the opening degrees of the air supply electronic expansion valve and the main electronic expansion valve according to the change rate of the exhaust air temperature.
Here, when the outdoor environment indicates that the air make-up and enthalpy increasing functions need to be started, the operating frequency of the compressor is further judged. If the compressor frequency is low, then no vapor make-up enthalpy is required. In this case, the demand for heating may be low for the user, and on the other hand, the supply of air at low frequency may cause the suction of the compressor to carry liquid. Therefore, when the frequency of the compressor is low, the vapor filling and enthalpy increasing are not carried out. When the frequency of the compressor is greater than or equal to the preset frequency, the exhaust temperature of the compressor is easily overhigh. Therefore, the compressor needs to be started to supplement the air and increase the enthalpy. But when the bottom temperature of the compressor is lower, the hidden danger of liquid impact exists when the compressor is subjected to air supply and enthalpy increase. Therefore, when the temperature of the bottom of the compressor is less than or equal to the preset bottom pressing temperature, the compressor is heated to increase the temperature of the bottom of the compressor. To avoid the occurrence of liquid slugging. After the temperature at the bottom of the compressor rises, the electric heating belt is turned off. And then, further judging whether the exhaust temperature of the compressor meets the condition of starting air supply and enthalpy increase.
In practical applications, as shown in figure 8,
s401, starting a heat pump air conditioner to run in a heating mode;
s402, judging whether the outdoor environment temperature Tao is less than or equal to the first temperature Tao 1 If yes, executing S403; if not, executing S402;
s403, judging whether the frequency f of the compressor is greater than or equal to the preset frequency f set If yes, executing; if not, executing S403;
s404, judging whether the bottom temperature Tb of the compressor is greater than the preset bottom-pressing temperature Tb set (ii) a If so, executing S407; if not, executing S405;
s405, controlling an electric heating belt of the compressor to start running;
s406, Tb > Tb set When the electric heating belt is closed, the electric heating belt is controlled to be closed;
s407, judging whether the discharge temperature Td of the compressor meets a preset condition (Td) 1 ≤Td≤Td 2 ) If yes, executing S410; if NO and Td > Td 2 Then, go to S408; if not and Td < Td 1 If yes, executing S409;
s408, controlling the electromagnetic valve to be opened, opening the air supply electronic expansion valve to 200Pluse, and reducing the main electronic expansion valve by 5 Pluse; then, S407 is executed;
s409, controlling the electromagnetic valve to be closed, and then executing S407;
s410, controlling the electromagnetic valve to be opened, and opening the air-supplementing electronic expansion valve to a preset opening degree of 100 Pluse;
s411, adjusting the opening degrees of the air supply electronic expansion valve and the main electronic expansion valve according to the change rate mu of the exhaust air temperature; (specifically, when mu is more than or equal to 5 percent, the first amplitude of the air-replenishing electronic expansion valve is increased, and the second amplitude of the main electronic expansion valve is decreased, when mu is more than 2 percent and less than 5 percent, the third amplitude of the air-replenishing electronic expansion valve is increased, and the fourth amplitude of the main electronic expansion valve is decreased, when mu is more than or equal to-5 percent, the first amplitude of the air-replenishing electronic expansion valve is decreased, and the second amplitude of the main electronic expansion valve is increased, and when mu is more than-5 percent and less than-2 percent, the third amplitude of the air-replenishing electronic expansion valve is decreased, and the fourth amplitude of the main electronic expansion valve is increased);
s412, judging whether mu is more than or equal to 2% and less than or equal to 2%; if so, perform S413; if not, executing S411;
s413, judging whether the delta Tc is more than Tc set (ii) a If so, go to S414; if not, executing S411;
and S414, keeping the opening degrees of the air replenishing electronic expansion valve and the main electronic expansion valve.
The embodiment of the disclosure provides a control device for increasing enthalpy by air supply of a heat pump air conditioner, which comprises a control module, an acquisition module and an adjusting module. The control module is configured to control the air-supplementing enthalpy-increasing loop to be in a conducting state and control the air-supplementing electronic expansion valve to be opened to a preset opening degree under the condition that the heat pump air conditioner is determined to execute the air-supplementing enthalpy-increasing control instruction; the obtaining module is configured to obtain an exhaust temperature change rate of the compressor; the adjusting module is configured to adjust the opening degrees of the air supply electronic expansion valve and the main electronic expansion valve according to the exhaust air temperature change rate.
By adopting the control device for air supplement and enthalpy increase of the heat pump air conditioner, the conduction of the air supplement and enthalpy increase loop is controlled under the condition that the air supplement and enthalpy increase of the heat pump air conditioner are determined, and the opening of the air supplement electronic expansion valve is controlled to be a preset opening degree. And then the opening degrees of the air supply electronic expansion valve and the main electronic expansion valve are adjusted according to the change rate of the exhaust air temperature. The adjustment of the exhaust temperature is realized by adjusting the flow of the refrigerant at the air supplement port of the compressor. Therefore, the system operation tends to steady state operation, and the heating capacity of the system in a low-temperature environment is improved.
Referring to fig. 9, an embodiment of the present disclosure provides a control apparatus for increasing enthalpy of air make-up of a heat pump air conditioner, including a processor (processor)100 and a memory (memory) 101. Optionally, the apparatus may also include a Communication Interface (Communication Interface)102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via a bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to execute the above-described control method for enthalpy increase of air make-up of heat pump air conditioner.
In addition, the logic instructions in the memory 101 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 101, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes functional applications and data processing by executing program instructions/modules stored in the memory 101, so as to implement the above-described control method for increasing enthalpy of air make-up of the heat pump air conditioner.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides a heat pump air conditioner, which comprises the control device for increasing enthalpy of air supply of the heat pump air conditioner.
The embodiment of the disclosure provides a storage medium, which stores computer-executable instructions configured to execute the above control method for increasing enthalpy of air supply of a heat pump air conditioner.
The storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A control method for air supplement and enthalpy increase of a heat pump air conditioner is characterized in that the heat pump air conditioner comprises a heating circulation loop and an air supplement and enthalpy increase loop, wherein a main electronic expansion valve is arranged on the heating circulation loop; the air-replenishing enthalpy-increasing loop is connected in parallel between the indoor side heat exchanger of the heating circulation loop and the compressor and is used for replenishing air for the compressor; the vapor-supplementing enthalpy-increasing loop is provided with a vapor-supplementing electronic expansion valve; the control method comprises the following steps:
under the condition that the heat pump air conditioner is determined to execute the air-supplementing and enthalpy-increasing control instruction, controlling the air-supplementing and enthalpy-increasing loop to be in a conducting state, and controlling the air-supplementing electronic expansion valve to be opened to a preset opening degree;
acquiring the exhaust temperature change rate of the compressor;
and adjusting the opening degrees of the air supply electronic expansion valve and the main electronic expansion valve according to the change rate of the exhaust air temperature.
2. The method of claim 1, wherein adjusting the opening degrees of the makeup electronic expansion valve and the main electronic expansion valve according to the exhaust temperature change rate comprises:
under the condition that the absolute value of the exhaust gas temperature change rate is greater than or equal to a first threshold value, adjusting the air supply electronic expansion valve according to a first amplitude value, determining a second amplitude value according to the current opening degree of the main electronic expansion valve, and adjusting the main electronic expansion valve according to the second amplitude value;
under the condition that the absolute value of the exhaust temperature change rate is smaller than the first threshold and larger than the second threshold, adjusting the air supply electronic expansion according to a third amplitude, and adjusting the main electronic expansion valve according to a fourth amplitude;
keeping the opening degrees of the air supply electronic expansion valve and the main electronic expansion valve under the condition that the absolute value of the exhaust temperature change rate is less than or equal to a second threshold value and the temperature difference of the refrigerant in the heating circulation loop at the inlet and the outlet of the economizer is greater than a temperature difference threshold value;
wherein the first amplitude is greater than the third amplitude and the second amplitude is greater than the fourth amplitude.
3. The method of claim 2, wherein the second magnitude is determined by determining a current opening degree of the main electronic expansion valve by:
determining a second amplitude corresponding to the current opening degree of the main electronic expansion valve according to the corresponding relation between the opening degree interval and the amplitude;
wherein, the larger the value of the opening degree interval is, the larger the amplitude is.
4. The method of claim 1, wherein the heat pump air conditioner is determined to execute the air-make-up enthalpy increase control command by:
acquiring the exhaust temperature of a compressor under the condition that a heat pump air conditioner starts to operate in a heating mode and the outdoor environment temperature is less than or equal to a first temperature;
determining a vapor-supplementing and enthalpy-increasing control instruction executed by the heat pump air conditioner under the condition that the exhaust temperature meets a preset condition;
the preset condition is that the exhaust temperature is greater than or equal to a first exhaust temperature threshold and is less than or equal to a second exhaust temperature threshold.
5. The method according to claim 4, characterized in that the bottom of the compressor is provided with an electric heating belt; before the obtaining of the discharge temperature of the compressor, the method further comprises:
acquiring the operating frequency of a compressor;
under the condition that the operating frequency of the compressor is greater than or equal to the preset frequency, judging whether the bottom temperature of the compressor is greater than the preset bottom pressing temperature or not; if yes, acquiring the exhaust temperature of the compressor; if not, the electric heating belt of the compressor is controlled to be opened so as to increase the bottom temperature of the compressor to the preset bottom pressing temperature.
6. The method of claim 4, further comprising:
controlling the conduction of the air-supply enthalpy-increasing pipeline under the condition that the exhaust temperature does not meet the preset condition and is greater than a second exhaust threshold value;
and adjusting the opening degrees of the air supply electronic expansion valve and the main electronic expansion valve so as to enable the exhaust temperature to meet the preset condition.
7. The method of claim 4, further comprising:
and under the condition that the exhaust temperature does not meet the preset condition and is less than a first exhaust threshold value, controlling the air-supply enthalpy-increasing pipeline to be closed.
8. A control device for enthalpy increase of air make-up of heat pump air conditioner, comprising a processor and a memory storing program instructions, wherein the processor is configured to execute the control method for enthalpy increase of air make-up of heat pump air conditioner according to any one of claims 1 to 7 when executing the program instructions.
9. A heat pump air conditioner, comprising:
a heating circulation loop including a main electronic expansion valve; is used for heating;
the vapor-supplementing enthalpy-increasing loop comprises a vapor-supplementing electronic expansion valve; the air-supplying enthalpy-increasing loop is connected between the indoor side heat exchanger and the compressor in parallel; used for supplying air and increasing enthalpy for the compressor; and the combination of (a) and (b),
the apparatus of claim 8 for controlling enthalpy increase of air make-up of heat pump air conditioner.
10. The heat pump air conditioner of claim 9 wherein the vapor-make-up enthalpy addition circuit further comprises:
the defrosting pipe is arranged on a chassis of the outdoor heat exchanger of the heating circulation loop and is close to the bottom of the outdoor heat exchanger; one end of the defrosting pipe is connected with the electromagnetic valve, and the other end of the defrosting pipe is connected with the air supply electronic expansion valve.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115560448A (en) * | 2022-10-14 | 2023-01-03 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device, air conditioner and computer readable storage medium |
| CN115560448B (en) * | 2022-10-14 | 2023-06-09 | 宁波奥克斯电气股份有限公司 | Air conditioner control method, device, air conditioner and computer readable storage medium |
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